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wp-includes/class-wp-xmlrpc-server.php

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<?php
/**
 * XML-RPC protocol support for WordPress.
 *
 * @package WordPress
 * @subpackage Publishing
 */

/**
 * WordPress XMLRPC server implementation.
 *
 * Implements compatibility for Blogger API, MetaWeblog API, MovableType, and
 * pingback. Additional WordPress API for managing comments, pages, posts,
 * options, etc.
 *
 * As of WordPress 3.5.0, XML-RPC is enabled by default. It can be disabled
 * via the {@see 'xmlrpc_enabled'} filter found in wp_xmlrpc_server::set_is_enabled().
 *
 * @since 1.5.0
 *
 * @see IXR_Server
 */
#[AllowDynamicProperties]
class wp_xmlrpc_server extends IXR_Server {
    /**
     * Methods.
     *
     * @var array
     */
    public $methods;

    /**
     * Blog options.
     *
     * @var array
     */
    public $blog_options;

    /**
     * IXR_Error instance.
     *
     * @var IXR_Error
     */
    public $error;

    /**
     * Flags that the user authentication has failed in this instance of wp_xmlrpc_server.
     *
     * @var bool
     */
    protected $auth_failed = false;

    /**
     * Flags that XML-RPC is enabled
     *
     * @var bool
     */
    private $is_enabled;

    /**
     * Registers all of the XMLRPC methods that XMLRPC server understands.
     *
     * Sets up server and method property. Passes XMLRPC methods through the
     * {@see 'xmlrpc_methods'} filter to allow plugins to extend or replace
     * XML-RPC methods.
     *
     * @since 1.5.0
     */
    public function __construct() {
        $this->methods = array(
            // WordPress API.
            'wp.getUsersBlogs'                 => 'this:wp_getUsersBlogs',
            'wp.newPost'                       => 'this:wp_newPost',
            'wp.editPost'                      => 'this:wp_editPost',
            'wp.deletePost'                    => 'this:wp_deletePost',
            'wp.getPost'                       => 'this:wp_getPost',
            'wp.getPosts'                      => 'this:wp_getPosts',
            'wp.newTerm'                       => 'this:wp_newTerm',
            'wp.editTerm'                      => 'this:wp_editTerm',
            'wp.deleteTerm'                    => 'this:wp_deleteTerm',
            'wp.getTerm'                       => 'this:wp_getTerm',
            'wp.getTerms'                      => 'this:wp_getTerms',
            'wp.getTaxonomy'                   => 'this:wp_getTaxonomy',
            'wp.getTaxonomies'                 => 'this:wp_getTaxonomies',
            'wp.getUser'                       => 'this:wp_getUser',
            'wp.getUsers'                      => 'this:wp_getUsers',
            'wp.getProfile'                    => 'this:wp_getProfile',
            'wp.editProfile'                   => 'this:wp_editProfile',
            'wp.getPage'                       => 'this:wp_getPage',
            'wp.getPages'                      => 'this:wp_getPages',
            'wp.newPage'                       => 'this:wp_newPage',
            'wp.deletePage'                    => 'this:wp_deletePage',
            'wp.editPage'                      => 'this:wp_editPage',
            'wp.getPageList'                   => 'this:wp_getPageList',
            'wp.getAuthors'                    => 'this:wp_getAuthors',
            'wp.getCategories'                 => 'this:mw_getCategories',     // Alias.
            'wp.getTags'                       => 'this:wp_getTags',
            'wp.newCategory'                   => 'this:wp_newCategory',
            'wp.deleteCategory'                => 'this:wp_deleteCategory',
            'wp.suggestCategories'             => 'this:wp_suggestCategories',
            'wp.uploadFile'                    => 'this:mw_newMediaObject',    // Alias.
            'wp.deleteFile'                    => 'this:wp_deletePost',        // Alias.
            'wp.getCommentCount'               => 'this:wp_getCommentCount',
            'wp.getPostStatusList'             => 'this:wp_getPostStatusList',
            'wp.getPageStatusList'             => 'this:wp_getPageStatusList',
            'wp.getPageTemplates'              => 'this:wp_getPageTemplates',
            'wp.getOptions'                    => 'this:wp_getOptions',
            'wp.setOptions'                    => 'this:wp_setOptions',
            'wp.getComment'                    => 'this:wp_getComment',
            'wp.getComments'                   => 'this:wp_getComments',
            'wp.deleteComment'                 => 'this:wp_deleteComment',
            'wp.editComment'                   => 'this:wp_editComment',
            'wp.newComment'                    => 'this:wp_newComment',
            'wp.getCommentStatusList'          => 'this:wp_getCommentStatusList',
            'wp.getMediaItem'                  => 'this:wp_getMediaItem',
            'wp.getMediaLibrary'               => 'this:wp_getMediaLibrary',
            'wp.getPostFormats'                => 'this:wp_getPostFormats',
            'wp.getPostType'                   => 'this:wp_getPostType',
            'wp.getPostTypes'                  => 'this:wp_getPostTypes',
            'wp.getRevisions'                  => 'this:wp_getRevisions',
            'wp.restoreRevision'               => 'this:wp_restoreRevision',

            // Blogger API.
            'blogger.getUsersBlogs'            => 'this:blogger_getUsersBlogs',
            'blogger.getUserInfo'              => 'this:blogger_getUserInfo',
            'blogger.getPost'                  => 'this:blogger_getPost',
            'blogger.getRecentPosts'           => 'this:blogger_getRecentPosts',
            'blogger.newPost'                  => 'this:blogger_newPost',
            'blogger.editPost'                 => 'this:blogger_editPost',
            'blogger.deletePost'               => 'this:blogger_deletePost',

            // MetaWeblog API (with MT extensions to structs).
            'metaWeblog.newPost'               => 'this:mw_newPost',
            'metaWeblog.editPost'              => 'this:mw_editPost',
            'metaWeblog.getPost'               => 'this:mw_getPost',
            'metaWeblog.getRecentPosts'        => 'this:mw_getRecentPosts',
            'metaWeblog.getCategories'         => 'this:mw_getCategories',
            'metaWeblog.newMediaObject'        => 'this:mw_newMediaObject',

            /*
             * MetaWeblog API aliases for Blogger API.
             * See http://www.xmlrpc.com/stories/storyReader$2460
             */
            'metaWeblog.deletePost'            => 'this:blogger_deletePost',
            'metaWeblog.getUsersBlogs'         => 'this:blogger_getUsersBlogs',

            // MovableType API.
            'mt.getCategoryList'               => 'this:mt_getCategoryList',
            'mt.getRecentPostTitles'           => 'this:mt_getRecentPostTitles',
            'mt.getPostCategories'             => 'this:mt_getPostCategories',
            'mt.setPostCategories'             => 'this:mt_setPostCategories',
            'mt.supportedMethods'              => 'this:mt_supportedMethods',
            'mt.supportedTextFilters'          => 'this:mt_supportedTextFilters',
            'mt.getTrackbackPings'             => 'this:mt_getTrackbackPings',
            'mt.publishPost'                   => 'this:mt_publishPost',

            // Pingback.
            'pingback.ping'                    => 'this:pingback_ping',
            'pingback.extensions.getPingbacks' => 'this:pingback_extensions_getPingbacks',

            'demo.sayHello'                    => 'this:sayHello',
            'demo.addTwoNumbers'               => 'this:addTwoNumbers',
        );

        $this->initialise_blog_option_info();

        /**
         * Filters the methods exposed by the XML-RPC server.
         *
         * This filter can be used to add new methods, and remove built-in methods.
         *
         * @since 1.5.0
         *
         * @param string[] $methods An array of XML-RPC methods, keyed by their methodName.
         */
        $this->methods = apply_filters( 'xmlrpc_methods', $this->methods );

        $this->set_is_enabled();
    }

    /**
     * Sets wp_xmlrpc_server::$is_enabled property.
     *
     * Determines whether the xmlrpc server is enabled on this WordPress install
     * and set the is_enabled property accordingly.
     *
     * @since 5.7.3
     */
    private function set_is_enabled() {
        /*
         * Respect old get_option() filters left for back-compat when the 'enable_xmlrpc'
         * option was deprecated in 3.5.0. Use the {@see 'xmlrpc_enabled'} hook instead.
         */
        $is_enabled = apply_filters( 'pre_option_enable_xmlrpc', false );
        if ( false === $is_enabled ) {
            $is_enabled = apply_filters( 'option_enable_xmlrpc', true );
        }

        /**
         * Filters whether XML-RPC methods requiring authentication are enabled.
         *
         * Contrary to the way it's named, this filter does not control whether XML-RPC is *fully*
         * enabled, rather, it only controls whether XML-RPC methods requiring authentication -
         * such as for publishing purposes - are enabled.
         *
         * Further, the filter does not control whether pingbacks or other custom endpoints that don't
         * require authentication are enabled. This behavior is expected, and due to how parity was matched
         * with the `enable_xmlrpc` UI option the filter replaced when it was introduced in 3.5.
         *
         * To disable XML-RPC methods that require authentication, use:
         *
         *     add_filter( 'xmlrpc_enabled', '__return_false' );
         *
         * For more granular control over all XML-RPC methods and requests, see the {@see 'xmlrpc_methods'}
         * and {@see 'xmlrpc_element_limit'} hooks.
         *
         * @since 3.5.0
         *
         * @param bool $is_enabled Whether XML-RPC is enabled. Default true.
         */
        $this->is_enabled = apply_filters( 'xmlrpc_enabled', $is_enabled );
    }

    /**
     * Makes private/protected methods readable for backward compatibility.
     *
     * @since 4.0.0
     *
     * @param string $name      Method to call.
     * @param array  $arguments Arguments to pass when calling.
     * @return array|IXR_Error|false Return value of the callback, false otherwise.
     */
    public function __call( $name, $arguments ) {
        if ( '_multisite_getUsersBlogs' === $name ) {
            return $this->_multisite_getUsersBlogs( ...$arguments );
        }
        return false;
    }

    /**
     * Serves the XML-RPC request.
     *
     * @since 2.9.0
     */
    public function serve_request() {
        $this->IXR_Server( $this->methods );
    }

    /**
     * Tests XMLRPC API by saying, "Hello!" to client.
     *
     * @since 1.5.0
     *
     * @return string Hello string response.
     */
    public function sayHello() {
        return 'Hello!';
    }

    /**
     * Tests XMLRPC API by adding two numbers for client.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int $0 A number to add.
     *     @type int $1 A second number to add.
     * }
     * @return int Sum of the two given numbers.
     */
    public function addTwoNumbers( $args ) {
        $number1 = $args[0];
        $number2 = $args[1];
        return $number1 + $number2;
    }

    /**
     * Logs user in.
     *
     * @since 2.8.0
     *
     * @param string $username User's username.
     * @param string $password User's password.
     * @return WP_User|false WP_User object if authentication passed, false otherwise.
     */
    public function login( $username, $password ) {
        if ( ! $this->is_enabled ) {
            $this->error = new IXR_Error( 405, sprintf( __( 'XML-RPC services are disabled on this site.' ) ) );
            return false;
        }

        if ( $this->auth_failed ) {
            $user = new WP_Error( 'login_prevented' );
        } else {
            $user = wp_authenticate( $username, $password );
        }

        if ( is_wp_error( $user ) ) {
            $this->error = new IXR_Error( 403, __( 'Incorrect username or password.' ) );

            // Flag that authentication has failed once on this wp_xmlrpc_server instance.
            $this->auth_failed = true;

            /**
             * Filters the XML-RPC user login error message.
             *
             * @since 3.5.0
             *
             * @param IXR_Error $error The XML-RPC error message.
             * @param WP_Error  $user  WP_Error object.
             */
            $this->error = apply_filters( 'xmlrpc_login_error', $this->error, $user );
            return false;
        }

        wp_set_current_user( $user->ID );
        return $user;
    }

    /**
     * Checks user's credentials. Deprecated.
     *
     * @since 1.5.0
     * @deprecated 2.8.0 Use wp_xmlrpc_server::login()
     * @see wp_xmlrpc_server::login()
     *
     * @param string $username User's username.
     * @param string $password User's password.
     * @return bool Whether authentication passed.
     */
    public function login_pass_ok( $username, $password ) {
        return (bool) $this->login( $username, $password );
    }

    /**
     * Escapes string or array of strings for database.
     *
     * @since 1.5.2
     *
     * @param string|array $data Escape single string or array of strings.
     * @return string|void Returns with string is passed, alters by-reference
     *                     when array is passed.
     */
    public function escape( &$data ) {
        if ( ! is_array( $data ) ) {
            return wp_slash( $data );
        }

        foreach ( $data as &$v ) {
            if ( is_array( $v ) ) {
                $this->escape( $v );
            } elseif ( ! is_object( $v ) ) {
                $v = wp_slash( $v );
            }
        }
    }

    /**
     * Sends error response to client.
     *
     * Sends an XML error response to the client. If the endpoint is enabled
     * an HTTP 200 response is always sent per the XML-RPC specification.
     *
     * @since 5.7.3
     *
     * @param IXR_Error|string $error   Error code or an error object.
     * @param false            $message Error message. Optional.
     */
    public function error( $error, $message = false ) {
        // Accepts either an error object or an error code and message
        if ( $message && ! is_object( $error ) ) {
            $error = new IXR_Error( $error, $message );
        }

        if ( ! $this->is_enabled ) {
            status_header( $error->code );
        }

        $this->output( $error->getXml() );
    }

    /**
     * Retrieves custom fields for post.
     *
     * @since 2.5.0
     *
     * @param int $post_id Post ID.
     * @return array Custom fields, if exist.
     */
    public function get_custom_fields( $post_id ) {
        $post_id = (int) $post_id;

        $custom_fields = array();

        foreach ( (array) has_meta( $post_id ) as $meta ) {
            // Don't expose protected fields.
            if ( ! current_user_can( 'edit_post_meta', $post_id, $meta['meta_key'] ) ) {
                continue;
            }

            $custom_fields[] = array(
                'id'    => $meta['meta_id'],
                'key'   => $meta['meta_key'],
                'value' => $meta['meta_value'],
            );
        }

        return $custom_fields;
    }

    /**
     * Sets custom fields for post.
     *
     * @since 2.5.0
     *
     * @param int   $post_id Post ID.
     * @param array $fields  Custom fields.
     */
    public function set_custom_fields( $post_id, $fields ) {
        $post_id = (int) $post_id;

        foreach ( (array) $fields as $meta ) {
            if ( isset( $meta['id'] ) ) {
                $meta['id'] = (int) $meta['id'];
                $pmeta      = get_metadata_by_mid( 'post', $meta['id'] );

                if ( ! $pmeta || $pmeta->post_id != $post_id ) {
                    continue;
                }

                if ( isset( $meta['key'] ) ) {
                    $meta['key'] = wp_unslash( $meta['key'] );
                    if ( $meta['key'] !== $pmeta->meta_key ) {
                        continue;
                    }
                    $meta['value'] = wp_unslash( $meta['value'] );
                    if ( current_user_can( 'edit_post_meta', $post_id, $meta['key'] ) ) {
                        update_metadata_by_mid( 'post', $meta['id'], $meta['value'] );
                    }
                } elseif ( current_user_can( 'delete_post_meta', $post_id, $pmeta->meta_key ) ) {
                    delete_metadata_by_mid( 'post', $meta['id'] );
                }
            } elseif ( current_user_can( 'add_post_meta', $post_id, wp_unslash( $meta['key'] ) ) ) {
                add_post_meta( $post_id, $meta['key'], $meta['value'] );
            }
        }
    }

    /**
     * Retrieves custom fields for a term.
     *
     * @since 4.9.0
     *
     * @param int $term_id Term ID.
     * @return array Array of custom fields, if they exist.
     */
    public function get_term_custom_fields( $term_id ) {
        $term_id = (int) $term_id;

        $custom_fields = array();

        foreach ( (array) has_term_meta( $term_id ) as $meta ) {

            if ( ! current_user_can( 'edit_term_meta', $term_id ) ) {
                continue;
            }

            $custom_fields[] = array(
                'id'    => $meta['meta_id'],
                'key'   => $meta['meta_key'],
                'value' => $meta['meta_value'],
            );
        }

        return $custom_fields;
    }

    /**
     * Sets custom fields for a term.
     *
     * @since 4.9.0
     *
     * @param int   $term_id Term ID.
     * @param array $fields  Custom fields.
     */
    public function set_term_custom_fields( $term_id, $fields ) {
        $term_id = (int) $term_id;

        foreach ( (array) $fields as $meta ) {
            if ( isset( $meta['id'] ) ) {
                $meta['id'] = (int) $meta['id'];
                $pmeta      = get_metadata_by_mid( 'term', $meta['id'] );
                if ( isset( $meta['key'] ) ) {
                    $meta['key'] = wp_unslash( $meta['key'] );
                    if ( $meta['key'] !== $pmeta->meta_key ) {
                        continue;
                    }
                    $meta['value'] = wp_unslash( $meta['value'] );
                    if ( current_user_can( 'edit_term_meta', $term_id ) ) {
                        update_metadata_by_mid( 'term', $meta['id'], $meta['value'] );
                    }
                } elseif ( current_user_can( 'delete_term_meta', $term_id ) ) {
                    delete_metadata_by_mid( 'term', $meta['id'] );
                }
            } elseif ( current_user_can( 'add_term_meta', $term_id ) ) {
                add_term_meta( $term_id, $meta['key'], $meta['value'] );
            }
        }
    }

    /**
     * Sets up blog options property.
     *
     * Passes property through {@see 'xmlrpc_blog_options'} filter.
     *
     * @since 2.6.0
     */
    public function initialise_blog_option_info() {
        $this->blog_options = array(
            // Read-only options.
            'software_name'           => array(
                'desc'     => __( 'Software Name' ),
                'readonly' => true,
                'value'    => 'WordPress',
            ),
            'software_version'        => array(
                'desc'     => __( 'Software Version' ),
                'readonly' => true,
                'value'    => get_bloginfo( 'version' ),
            ),
            'blog_url'                => array(
                'desc'     => __( 'WordPress Address (URL)' ),
                'readonly' => true,
                'option'   => 'siteurl',
            ),
            'home_url'                => array(
                'desc'     => __( 'Site Address (URL)' ),
                'readonly' => true,
                'option'   => 'home',
            ),
            'login_url'               => array(
                'desc'     => __( 'Login Address (URL)' ),
                'readonly' => true,
                'value'    => wp_login_url(),
            ),
            'admin_url'               => array(
                'desc'     => __( 'The URL to the admin area' ),
                'readonly' => true,
                'value'    => get_admin_url(),
            ),
            'image_default_link_type' => array(
                'desc'     => __( 'Image default link type' ),
                'readonly' => true,
                'option'   => 'image_default_link_type',
            ),
            'image_default_size'      => array(
                'desc'     => __( 'Image default size' ),
                'readonly' => true,
                'option'   => 'image_default_size',
            ),
            'image_default_align'     => array(
                'desc'     => __( 'Image default align' ),
                'readonly' => true,
                'option'   => 'image_default_align',
            ),
            'template'                => array(
                'desc'     => __( 'Template' ),
                'readonly' => true,
                'option'   => 'template',
            ),
            'stylesheet'              => array(
                'desc'     => __( 'Stylesheet' ),
                'readonly' => true,
                'option'   => 'stylesheet',
            ),
            'post_thumbnail'          => array(
                'desc'     => __( 'Post Thumbnail' ),
                'readonly' => true,
                'value'    => current_theme_supports( 'post-thumbnails' ),
            ),

            // Updatable options.
            'time_zone'               => array(
                'desc'     => __( 'Time Zone' ),
                'readonly' => false,
                'option'   => 'gmt_offset',
            ),
            'blog_title'              => array(
                'desc'     => __( 'Site Title' ),
                'readonly' => false,
                'option'   => 'blogname',
            ),
            'blog_tagline'            => array(
                'desc'     => __( 'Site Tagline' ),
                'readonly' => false,
                'option'   => 'blogdescription',
            ),
            'date_format'             => array(
                'desc'     => __( 'Date Format' ),
                'readonly' => false,
                'option'   => 'date_format',
            ),
            'time_format'             => array(
                'desc'     => __( 'Time Format' ),
                'readonly' => false,
                'option'   => 'time_format',
            ),
            'users_can_register'      => array(
                'desc'     => __( 'Allow new users to sign up' ),
                'readonly' => false,
                'option'   => 'users_can_register',
            ),
            'thumbnail_size_w'        => array(
                'desc'     => __( 'Thumbnail Width' ),
                'readonly' => false,
                'option'   => 'thumbnail_size_w',
            ),
            'thumbnail_size_h'        => array(
                'desc'     => __( 'Thumbnail Height' ),
                'readonly' => false,
                'option'   => 'thumbnail_size_h',
            ),
            'thumbnail_crop'          => array(
                'desc'     => __( 'Crop thumbnail to exact dimensions' ),
                'readonly' => false,
                'option'   => 'thumbnail_crop',
            ),
            'medium_size_w'           => array(
                'desc'     => __( 'Medium size image width' ),
                'readonly' => false,
                'option'   => 'medium_size_w',
            ),
            'medium_size_h'           => array(
                'desc'     => __( 'Medium size image height' ),
                'readonly' => false,
                'option'   => 'medium_size_h',
            ),
            'medium_large_size_w'     => array(
                'desc'     => __( 'Medium-Large size image width' ),
                'readonly' => false,
                'option'   => 'medium_large_size_w',
            ),
            'medium_large_size_h'     => array(
                'desc'     => __( 'Medium-Large size image height' ),
                'readonly' => false,
                'option'   => 'medium_large_size_h',
            ),
            'large_size_w'            => array(
                'desc'     => __( 'Large size image width' ),
                'readonly' => false,
                'option'   => 'large_size_w',
            ),
            'large_size_h'            => array(
                'desc'     => __( 'Large size image height' ),
                'readonly' => false,
                'option'   => 'large_size_h',
            ),
            'default_comment_status'  => array(
                'desc'     => __( 'Allow people to submit comments on new posts.' ),
                'readonly' => false,
                'option'   => 'default_comment_status',
            ),
            'default_ping_status'     => array(
                'desc'     => __( 'Allow link notifications from other blogs (pingbacks and trackbacks) on new posts.' ),
                'readonly' => false,
                'option'   => 'default_ping_status',
            ),
        );

        /**
         * Filters the XML-RPC blog options property.
         *
         * @since 2.6.0
         *
         * @param array $blog_options An array of XML-RPC blog options.
         */
        $this->blog_options = apply_filters( 'xmlrpc_blog_options', $this->blog_options );
    }

    /**
     * Retrieves the blogs of the user.
     *
     * @since 2.6.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type string $0 Username.
     *     @type string $1 Password.
     * }
     * @return array|IXR_Error Array contains:
     *  - 'isAdmin'
     *  - 'isPrimary' - whether the blog is the user's primary blog
     *  - 'url'
     *  - 'blogid'
     *  - 'blogName'
     *  - 'xmlrpc' - url of xmlrpc endpoint
     */
    public function wp_getUsersBlogs( $args ) {
        if ( ! $this->minimum_args( $args, 2 ) ) {
            return $this->error;
        }

        // If this isn't on WPMU then just use blogger_getUsersBlogs().
        if ( ! is_multisite() ) {
            array_unshift( $args, 1 );
            return $this->blogger_getUsersBlogs( $args );
        }

        $this->escape( $args );

        $username = $args[0];
        $password = $args[1];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /**
         * Fires after the XML-RPC user has been authenticated but before the rest of
         * the method logic begins.
         *
         * All built-in XML-RPC methods use the action xmlrpc_call, with a parameter
         * equal to the method's name, e.g., wp.getUsersBlogs, wp.newPost, etc.
         *
         * @since 2.5.0
         * @since 5.7.0 Added the `$args` and `$server` parameters.
         *
         * @param string           $name   The method name.
         * @param array|string     $args   The escaped arguments passed to the method.
         * @param wp_xmlrpc_server $server The XML-RPC server instance.
         */
        do_action( 'xmlrpc_call', 'wp.getUsersBlogs', $args, $this );

        $blogs           = (array) get_blogs_of_user( $user->ID );
        $struct          = array();
        $primary_blog_id = 0;
        $active_blog     = get_active_blog_for_user( $user->ID );
        if ( $active_blog ) {
            $primary_blog_id = (int) $active_blog->blog_id;
        }

        foreach ( $blogs as $blog ) {
            // Don't include blogs that aren't hosted at this site.
            if ( get_current_network_id() != $blog->site_id ) {
                continue;
            }

            $blog_id = $blog->userblog_id;

            switch_to_blog( $blog_id );

            $is_admin   = current_user_can( 'manage_options' );
            $is_primary = ( (int) $blog_id === $primary_blog_id );

            $struct[] = array(
                'isAdmin'   => $is_admin,
                'isPrimary' => $is_primary,
                'url'       => home_url( '/' ),
                'blogid'    => (string) $blog_id,
                'blogName'  => get_option( 'blogname' ),
                'xmlrpc'    => site_url( 'xmlrpc.php', 'rpc' ),
            );

            restore_current_blog();
        }

        return $struct;
    }

    /**
     * Checks if the method received at least the minimum number of arguments.
     *
     * @since 3.4.0
     *
     * @param array $args  An array of arguments to check.
     * @param int   $count Minimum number of arguments.
     * @return bool True if `$args` contains at least `$count` arguments, false otherwise.
     */
    protected function minimum_args( $args, $count ) {
        if ( ! is_array( $args ) || count( $args ) < $count ) {
            $this->error = new IXR_Error( 400, __( 'Insufficient arguments passed to this XML-RPC method.' ) );
            return false;
        }

        return true;
    }

    /**
     * Prepares taxonomy data for return in an XML-RPC object.
     *
     * @param WP_Taxonomy $taxonomy The unprepared taxonomy data.
     * @param array       $fields   The subset of taxonomy fields to return.
     * @return array The prepared taxonomy data.
     */
    protected function _prepare_taxonomy( $taxonomy, $fields ) {
        $_taxonomy = array(
            'name'         => $taxonomy->name,
            'label'        => $taxonomy->label,
            'hierarchical' => (bool) $taxonomy->hierarchical,
            'public'       => (bool) $taxonomy->public,
            'show_ui'      => (bool) $taxonomy->show_ui,
            '_builtin'     => (bool) $taxonomy->_builtin,
        );

        if ( in_array( 'labels', $fields, true ) ) {
            $_taxonomy['labels'] = (array) $taxonomy->labels;
        }

        if ( in_array( 'cap', $fields, true ) ) {
            $_taxonomy['cap'] = (array) $taxonomy->cap;
        }

        if ( in_array( 'menu', $fields, true ) ) {
            $_taxonomy['show_in_menu'] = (bool) $taxonomy->show_in_menu;
        }

        if ( in_array( 'object_type', $fields, true ) ) {
            $_taxonomy['object_type'] = array_unique( (array) $taxonomy->object_type );
        }

        /**
         * Filters XML-RPC-prepared data for the given taxonomy.
         *
         * @since 3.4.0
         *
         * @param array       $_taxonomy An array of taxonomy data.
         * @param WP_Taxonomy $taxonomy  Taxonomy object.
         * @param array       $fields    The subset of taxonomy fields to return.
         */
        return apply_filters( 'xmlrpc_prepare_taxonomy', $_taxonomy, $taxonomy, $fields );
    }

    /**
     * Prepares term data for return in an XML-RPC object.
     *
     * @param array|object $term The unprepared term data.
     * @return array The prepared term data.
     */
    protected function _prepare_term( $term ) {
        $_term = $term;
        if ( ! is_array( $_term ) ) {
            $_term = get_object_vars( $_term );
        }

        // For integers which may be larger than XML-RPC supports ensure we return strings.
        $_term['term_id']          = (string) $_term['term_id'];
        $_term['term_group']       = (string) $_term['term_group'];
        $_term['term_taxonomy_id'] = (string) $_term['term_taxonomy_id'];
        $_term['parent']           = (string) $_term['parent'];

        // Count we are happy to return as an integer because people really shouldn't use terms that much.
        $_term['count'] = (int) $_term['count'];

        // Get term meta.
        $_term['custom_fields'] = $this->get_term_custom_fields( $_term['term_id'] );

        /**
         * Filters XML-RPC-prepared data for the given term.
         *
         * @since 3.4.0
         *
         * @param array        $_term An array of term data.
         * @param array|object $term  Term object or array.
         */
        return apply_filters( 'xmlrpc_prepare_term', $_term, $term );
    }

    /**
     * Converts a WordPress date string to an IXR_Date object.
     *
     * @param string $date Date string to convert.
     * @return IXR_Date IXR_Date object.
     */
    protected function _convert_date( $date ) {
        if ( '0000-00-00 00:00:00' === $date ) {
            return new IXR_Date( '00000000T00:00:00Z' );
        }
        return new IXR_Date( mysql2date( 'Ymd\TH:i:s', $date, false ) );
    }

    /**
     * Converts a WordPress GMT date string to an IXR_Date object.
     *
     * @param string $date_gmt WordPress GMT date string.
     * @param string $date     Date string.
     * @return IXR_Date IXR_Date object.
     */
    protected function _convert_date_gmt( $date_gmt, $date ) {
        if ( '0000-00-00 00:00:00' !== $date && '0000-00-00 00:00:00' === $date_gmt ) {
            return new IXR_Date( get_gmt_from_date( mysql2date( 'Y-m-d H:i:s', $date, false ), 'Ymd\TH:i:s' ) );
        }
        return $this->_convert_date( $date_gmt );
    }

    /**
     * Prepares post data for return in an XML-RPC object.
     *
     * @param array $post   The unprepared post data.
     * @param array $fields The subset of post type fields to return.
     * @return array The prepared post data.
     */
    protected function _prepare_post( $post, $fields ) {
        // Holds the data for this post. built up based on $fields.
        $_post = array( 'post_id' => (string) $post['ID'] );

        // Prepare common post fields.
        $post_fields = array(
            'post_title'        => $post['post_title'],
            'post_date'         => $this->_convert_date( $post['post_date'] ),
            'post_date_gmt'     => $this->_convert_date_gmt( $post['post_date_gmt'], $post['post_date'] ),
            'post_modified'     => $this->_convert_date( $post['post_modified'] ),
            'post_modified_gmt' => $this->_convert_date_gmt( $post['post_modified_gmt'], $post['post_modified'] ),
            'post_status'       => $post['post_status'],
            'post_type'         => $post['post_type'],
            'post_name'         => $post['post_name'],
            'post_author'       => $post['post_author'],
            'post_password'     => $post['post_password'],
            'post_excerpt'      => $post['post_excerpt'],
            'post_content'      => $post['post_content'],
            'post_parent'       => (string) $post['post_parent'],
            'post_mime_type'    => $post['post_mime_type'],
            'link'              => get_permalink( $post['ID'] ),
            'guid'              => $post['guid'],
            'menu_order'        => (int) $post['menu_order'],
            'comment_status'    => $post['comment_status'],
            'ping_status'       => $post['ping_status'],
            'sticky'            => ( 'post' === $post['post_type'] && is_sticky( $post['ID'] ) ),
        );

        // Thumbnail.
        $post_fields['post_thumbnail'] = array();
        $thumbnail_id                  = get_post_thumbnail_id( $post['ID'] );
        if ( $thumbnail_id ) {
            $thumbnail_size                = current_theme_supports( 'post-thumbnail' ) ? 'post-thumbnail' : 'thumbnail';
            $post_fields['post_thumbnail'] = $this->_prepare_media_item( get_post( $thumbnail_id ), $thumbnail_size );
        }

        // Consider future posts as published.
        if ( 'future' === $post_fields['post_status'] ) {
            $post_fields['post_status'] = 'publish';
        }

        // Fill in blank post format.
        $post_fields['post_format'] = get_post_format( $post['ID'] );
        if ( empty( $post_fields['post_format'] ) ) {
            $post_fields['post_format'] = 'standard';
        }

        // Merge requested $post_fields fields into $_post.
        if ( in_array( 'post', $fields, true ) ) {
            $_post = array_merge( $_post, $post_fields );
        } else {
            $requested_fields = array_intersect_key( $post_fields, array_flip( $fields ) );
            $_post            = array_merge( $_post, $requested_fields );
        }

        $all_taxonomy_fields = in_array( 'taxonomies', $fields, true );

        if ( $all_taxonomy_fields || in_array( 'terms', $fields, true ) ) {
            $post_type_taxonomies = get_object_taxonomies( $post['post_type'], 'names' );
            $terms                = wp_get_object_terms( $post['ID'], $post_type_taxonomies );
            $_post['terms']       = array();
            foreach ( $terms as $term ) {
                $_post['terms'][] = $this->_prepare_term( $term );
            }
        }

        if ( in_array( 'custom_fields', $fields, true ) ) {
            $_post['custom_fields'] = $this->get_custom_fields( $post['ID'] );
        }

        if ( in_array( 'enclosure', $fields, true ) ) {
            $_post['enclosure'] = array();
            $enclosures         = (array) get_post_meta( $post['ID'], 'enclosure' );
            if ( ! empty( $enclosures ) ) {
                $encdata                      = explode( "\n", $enclosures[0] );
                $_post['enclosure']['url']    = trim( htmlspecialchars( $encdata[0] ) );
                $_post['enclosure']['length'] = (int) trim( $encdata[1] );
                $_post['enclosure']['type']   = trim( $encdata[2] );
            }
        }

        /**
         * Filters XML-RPC-prepared date for the given post.
         *
         * @since 3.4.0
         *
         * @param array $_post  An array of modified post data.
         * @param array $post   An array of post data.
         * @param array $fields An array of post fields.
         */
        return apply_filters( 'xmlrpc_prepare_post', $_post, $post, $fields );
    }

    /**
     * Prepares post data for return in an XML-RPC object.
     *
     * @since 3.4.0
     * @since 4.6.0 Converted the `$post_type` parameter to accept a WP_Post_Type object.
     *
     * @param WP_Post_Type $post_type Post type object.
     * @param array        $fields    The subset of post fields to return.
     * @return array The prepared post type data.
     */
    protected function _prepare_post_type( $post_type, $fields ) {
        $_post_type = array(
            'name'         => $post_type->name,
            'label'        => $post_type->label,
            'hierarchical' => (bool) $post_type->hierarchical,
            'public'       => (bool) $post_type->public,
            'show_ui'      => (bool) $post_type->show_ui,
            '_builtin'     => (bool) $post_type->_builtin,
            'has_archive'  => (bool) $post_type->has_archive,
            'supports'     => get_all_post_type_supports( $post_type->name ),
        );

        if ( in_array( 'labels', $fields, true ) ) {
            $_post_type['labels'] = (array) $post_type->labels;
        }

        if ( in_array( 'cap', $fields, true ) ) {
            $_post_type['cap']          = (array) $post_type->cap;
            $_post_type['map_meta_cap'] = (bool) $post_type->map_meta_cap;
        }

        if ( in_array( 'menu', $fields, true ) ) {
            $_post_type['menu_position'] = (int) $post_type->menu_position;
            $_post_type['menu_icon']     = $post_type->menu_icon;
            $_post_type['show_in_menu']  = (bool) $post_type->show_in_menu;
        }

        if ( in_array( 'taxonomies', $fields, true ) ) {
            $_post_type['taxonomies'] = get_object_taxonomies( $post_type->name, 'names' );
        }

        /**
         * Filters XML-RPC-prepared date for the given post type.
         *
         * @since 3.4.0
         * @since 4.6.0 Converted the `$post_type` parameter to accept a WP_Post_Type object.
         *
         * @param array        $_post_type An array of post type data.
         * @param WP_Post_Type $post_type  Post type object.
         */
        return apply_filters( 'xmlrpc_prepare_post_type', $_post_type, $post_type );
    }

    /**
     * Prepares media item data for return in an XML-RPC object.
     *
     * @param WP_Post $media_item     The unprepared media item data.
     * @param string  $thumbnail_size The image size to use for the thumbnail URL.
     * @return array The prepared media item data.
     */
    protected function _prepare_media_item( $media_item, $thumbnail_size = 'thumbnail' ) {
        $_media_item = array(
            'attachment_id'    => (string) $media_item->ID,
            'date_created_gmt' => $this->_convert_date_gmt( $media_item->post_date_gmt, $media_item->post_date ),
            'parent'           => $media_item->post_parent,
            'link'             => wp_get_attachment_url( $media_item->ID ),
            'title'            => $media_item->post_title,
            'caption'          => $media_item->post_excerpt,
            'description'      => $media_item->post_content,
            'metadata'         => wp_get_attachment_metadata( $media_item->ID ),
            'type'             => $media_item->post_mime_type,
            'alt'              => get_post_meta( $media_item->ID, '_wp_attachment_image_alt', true ),
        );

        $thumbnail_src = image_downsize( $media_item->ID, $thumbnail_size );
        if ( $thumbnail_src ) {
            $_media_item['thumbnail'] = $thumbnail_src[0];
        } else {
            $_media_item['thumbnail'] = $_media_item['link'];
        }

        /**
         * Filters XML-RPC-prepared data for the given media item.
         *
         * @since 3.4.0
         *
         * @param array   $_media_item    An array of media item data.
         * @param WP_Post $media_item     Media item object.
         * @param string  $thumbnail_size Image size.
         */
        return apply_filters( 'xmlrpc_prepare_media_item', $_media_item, $media_item, $thumbnail_size );
    }

    /**
     * Prepares page data for return in an XML-RPC object.
     *
     * @param WP_Post $page The unprepared page data.
     * @return array The prepared page data.
     */
    protected function _prepare_page( $page ) {
        // Get all of the page content and link.
        $full_page = get_extended( $page->post_content );
        $link      = get_permalink( $page->ID );

        // Get info the page parent if there is one.
        $parent_title = '';
        if ( ! empty( $page->post_parent ) ) {
            $parent       = get_post( $page->post_parent );
            $parent_title = $parent->post_title;
        }

        // Determine comment and ping settings.
        $allow_comments = comments_open( $page->ID ) ? 1 : 0;
        $allow_pings    = pings_open( $page->ID ) ? 1 : 0;

        // Format page date.
        $page_date     = $this->_convert_date( $page->post_date );
        $page_date_gmt = $this->_convert_date_gmt( $page->post_date_gmt, $page->post_date );

        // Pull the categories info together.
        $categories = array();
        if ( is_object_in_taxonomy( 'page', 'category' ) ) {
            foreach ( wp_get_post_categories( $page->ID ) as $cat_id ) {
                $categories[] = get_cat_name( $cat_id );
            }
        }

        // Get the author info.
        $author = get_userdata( $page->post_author );

        $page_template = get_page_template_slug( $page->ID );
        if ( empty( $page_template ) ) {
            $page_template = 'default';
        }

        $_page = array(
            'dateCreated'            => $page_date,
            'userid'                 => $page->post_author,
            'page_id'                => $page->ID,
            'page_status'            => $page->post_status,
            'description'            => $full_page['main'],
            'title'                  => $page->post_title,
            'link'                   => $link,
            'permaLink'              => $link,
            'categories'             => $categories,
            'excerpt'                => $page->post_excerpt,
            'text_more'              => $full_page['extended'],
            'mt_allow_comments'      => $allow_comments,
            'mt_allow_pings'         => $allow_pings,
            'wp_slug'                => $page->post_name,
            'wp_password'            => $page->post_password,
            'wp_author'              => $author->display_name,
            'wp_page_parent_id'      => $page->post_parent,
            'wp_page_parent_title'   => $parent_title,
            'wp_page_order'          => $page->menu_order,
            'wp_author_id'           => (string) $author->ID,
            'wp_author_display_name' => $author->display_name,
            'date_created_gmt'       => $page_date_gmt,
            'custom_fields'          => $this->get_custom_fields( $page->ID ),
            'wp_page_template'       => $page_template,
        );

        /**
         * Filters XML-RPC-prepared data for the given page.
         *
         * @since 3.4.0
         *
         * @param array   $_page An array of page data.
         * @param WP_Post $page  Page object.
         */
        return apply_filters( 'xmlrpc_prepare_page', $_page, $page );
    }

    /**
     * Prepares comment data for return in an XML-RPC object.
     *
     * @param WP_Comment $comment The unprepared comment data.
     * @return array The prepared comment data.
     */
    protected function _prepare_comment( $comment ) {
        // Format page date.
        $comment_date_gmt = $this->_convert_date_gmt( $comment->comment_date_gmt, $comment->comment_date );

        if ( '0' == $comment->comment_approved ) {
            $comment_status = 'hold';
        } elseif ( 'spam' === $comment->comment_approved ) {
            $comment_status = 'spam';
        } elseif ( '1' == $comment->comment_approved ) {
            $comment_status = 'approve';
        } else {
            $comment_status = $comment->comment_approved;
        }
        $_comment = array(
            'date_created_gmt' => $comment_date_gmt,
            'user_id'          => $comment->user_id,
            'comment_id'       => $comment->comment_ID,
            'parent'           => $comment->comment_parent,
            'status'           => $comment_status,
            'content'          => $comment->comment_content,
            'link'             => get_comment_link( $comment ),
            'post_id'          => $comment->comment_post_ID,
            'post_title'       => get_the_title( $comment->comment_post_ID ),
            'author'           => $comment->comment_author,
            'author_url'       => $comment->comment_author_url,
            'author_email'     => $comment->comment_author_email,
            'author_ip'        => $comment->comment_author_IP,
            'type'             => $comment->comment_type,
        );

        /**
         * Filters XML-RPC-prepared data for the given comment.
         *
         * @since 3.4.0
         *
         * @param array      $_comment An array of prepared comment data.
         * @param WP_Comment $comment  Comment object.
         */
        return apply_filters( 'xmlrpc_prepare_comment', $_comment, $comment );
    }

    /**
     * Prepares user data for return in an XML-RPC object.
     *
     * @param WP_User $user   The unprepared user object.
     * @param array   $fields The subset of user fields to return.
     * @return array The prepared user data.
     */
    protected function _prepare_user( $user, $fields ) {
        $_user = array( 'user_id' => (string) $user->ID );

        $user_fields = array(
            'username'     => $user->user_login,
            'first_name'   => $user->user_firstname,
            'last_name'    => $user->user_lastname,
            'registered'   => $this->_convert_date( $user->user_registered ),
            'bio'          => $user->user_description,
            'email'        => $user->user_email,
            'nickname'     => $user->nickname,
            'nicename'     => $user->user_nicename,
            'url'          => $user->user_url,
            'display_name' => $user->display_name,
            'roles'        => $user->roles,
        );

        if ( in_array( 'all', $fields, true ) ) {
            $_user = array_merge( $_user, $user_fields );
        } else {
            if ( in_array( 'basic', $fields, true ) ) {
                $basic_fields = array( 'username', 'email', 'registered', 'display_name', 'nicename' );
                $fields       = array_merge( $fields, $basic_fields );
            }
            $requested_fields = array_intersect_key( $user_fields, array_flip( $fields ) );
            $_user            = array_merge( $_user, $requested_fields );
        }

        /**
         * Filters XML-RPC-prepared data for the given user.
         *
         * @since 3.5.0
         *
         * @param array   $_user  An array of user data.
         * @param WP_User $user   User object.
         * @param array   $fields An array of user fields.
         */
        return apply_filters( 'xmlrpc_prepare_user', $_user, $user, $fields );
    }

    /**
     * Creates a new post for any registered post type.
     *
     * @since 3.4.0
     *
     * @link https://en.wikipedia.org/wiki/RSS_enclosure for information on RSS enclosures.
     *
     * @param array $args {
     *     Method arguments. Note: top-level arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 {
     *         Content struct for adding a new post. See wp_insert_post() for information on
     *         additional post fields
     *
     *         @type string $post_type      Post type. Default 'post'.
     *         @type string $post_status    Post status. Default 'draft'
     *         @type string $post_title     Post title.
     *         @type int    $post_author    Post author ID.
     *         @type string $post_excerpt   Post excerpt.
     *         @type string $post_content   Post content.
     *         @type string $post_date_gmt  Post date in GMT.
     *         @type string $post_date      Post date.
     *         @type string $post_password  Post password (20-character limit).
     *         @type string $comment_status Post comment enabled status. Accepts 'open' or 'closed'.
     *         @type string $ping_status    Post ping status. Accepts 'open' or 'closed'.
     *         @type bool   $sticky         Whether the post should be sticky. Automatically false if
     *                                      `$post_status` is 'private'.
     *         @type int    $post_thumbnail ID of an image to use as the post thumbnail/featured image.
     *         @type array  $custom_fields  Array of meta key/value pairs to add to the post.
     *         @type array  $terms          Associative array with taxonomy names as keys and arrays
     *                                      of term IDs as values.
     *         @type array  $terms_names    Associative array with taxonomy names as keys and arrays
     *                                      of term names as values.
     *         @type array  $enclosure      {
     *             Array of feed enclosure data to add to post meta.
     *
     *             @type string $url    URL for the feed enclosure.
     *             @type int    $length Size in bytes of the enclosure.
     *             @type string $type   Mime-type for the enclosure.
     *         }
     *     }
     * }
     * @return int|IXR_Error Post ID on success, IXR_Error instance otherwise.
     */
    public function wp_newPost( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $content_struct = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        // Convert the date field back to IXR form.
        if ( isset( $content_struct['post_date'] ) && ! ( $content_struct['post_date'] instanceof IXR_Date ) ) {
            $content_struct['post_date'] = $this->_convert_date( $content_struct['post_date'] );
        }

        /*
         * Ignore the existing GMT date if it is empty or a non-GMT date was supplied in $content_struct,
         * since _insert_post() will ignore the non-GMT date if the GMT date is set.
         */
        if ( isset( $content_struct['post_date_gmt'] ) && ! ( $content_struct['post_date_gmt'] instanceof IXR_Date ) ) {
            if ( '0000-00-00 00:00:00' === $content_struct['post_date_gmt'] || isset( $content_struct['post_date'] ) ) {
                unset( $content_struct['post_date_gmt'] );
            } else {
                $content_struct['post_date_gmt'] = $this->_convert_date( $content_struct['post_date_gmt'] );
            }
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.newPost', $args, $this );

        unset( $content_struct['ID'] );

        return $this->_insert_post( $user, $content_struct );
    }

    /**
     * Helper method for filtering out elements from an array.
     *
     * @since 3.4.0
     *
     * @param int $count Number to compare to one.
     * @return bool True if the number is greater than one, false otherwise.
     */
    private function _is_greater_than_one( $count ) {
        return $count > 1;
    }

    /**
     * Encapsulates the logic for sticking a post and determining if
     * the user has permission to do so.
     *
     * @since 4.3.0
     *
     * @param array $post_data
     * @param bool  $update
     * @return void|IXR_Error
     */
    private function _toggle_sticky( $post_data, $update = false ) {
        $post_type = get_post_type_object( $post_data['post_type'] );

        // Private and password-protected posts cannot be stickied.
        if ( 'private' === $post_data['post_status'] || ! empty( $post_data['post_password'] ) ) {
            // Error if the client tried to stick the post, otherwise, silently unstick.
            if ( ! empty( $post_data['sticky'] ) ) {
                return new IXR_Error( 401, __( 'Sorry, you cannot stick a private post.' ) );
            }

            if ( $update ) {
                unstick_post( $post_data['ID'] );
            }
        } elseif ( isset( $post_data['sticky'] ) ) {
            if ( ! current_user_can( $post_type->cap->edit_others_posts ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to make posts sticky.' ) );
            }

            $sticky = wp_validate_boolean( $post_data['sticky'] );
            if ( $sticky ) {
                stick_post( $post_data['ID'] );
            } else {
                unstick_post( $post_data['ID'] );
            }
        }
    }

    /**
     * Helper method for wp_newPost() and wp_editPost(), containing shared logic.
     *
     * @since 3.4.0
     *
     * @see wp_insert_post()
     *
     * @param WP_User         $user           The post author if post_author isn't set in $content_struct.
     * @param array|IXR_Error $content_struct Post data to insert.
     * @return IXR_Error|string
     */
    protected function _insert_post( $user, $content_struct ) {
        $defaults = array(
            'post_status'    => 'draft',
            'post_type'      => 'post',
            'post_author'    => 0,
            'post_password'  => '',
            'post_excerpt'   => '',
            'post_content'   => '',
            'post_title'     => '',
            'post_date'      => '',
            'post_date_gmt'  => '',
            'post_format'    => null,
            'post_name'      => null,
            'post_thumbnail' => null,
            'post_parent'    => 0,
            'ping_status'    => '',
            'comment_status' => '',
            'custom_fields'  => null,
            'terms_names'    => null,
            'terms'          => null,
            'sticky'         => null,
            'enclosure'      => null,
            'ID'             => null,
        );

        $post_data = wp_parse_args( array_intersect_key( $content_struct, $defaults ), $defaults );

        $post_type = get_post_type_object( $post_data['post_type'] );
        if ( ! $post_type ) {
            return new IXR_Error( 403, __( 'Invalid post type.' ) );
        }

        $update = ! empty( $post_data['ID'] );

        if ( $update ) {
            if ( ! get_post( $post_data['ID'] ) ) {
                return new IXR_Error( 401, __( 'Invalid post ID.' ) );
            }
            if ( ! current_user_can( 'edit_post', $post_data['ID'] ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
            }
            if ( get_post_type( $post_data['ID'] ) !== $post_data['post_type'] ) {
                return new IXR_Error( 401, __( 'The post type may not be changed.' ) );
            }
        } else {
            if ( ! current_user_can( $post_type->cap->create_posts ) || ! current_user_can( $post_type->cap->edit_posts ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to post on this site.' ) );
            }
        }

        switch ( $post_data['post_status'] ) {
            case 'draft':
            case 'pending':
                break;
            case 'private':
                if ( ! current_user_can( $post_type->cap->publish_posts ) ) {
                    return new IXR_Error( 401, __( 'Sorry, you are not allowed to create private posts in this post type.' ) );
                }
                break;
            case 'publish':
            case 'future':
                if ( ! current_user_can( $post_type->cap->publish_posts ) ) {
                    return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish posts in this post type.' ) );
                }
                break;
            default:
                if ( ! get_post_status_object( $post_data['post_status'] ) ) {
                    $post_data['post_status'] = 'draft';
                }
                break;
        }

        if ( ! empty( $post_data['post_password'] ) && ! current_user_can( $post_type->cap->publish_posts ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to create password protected posts in this post type.' ) );
        }

        $post_data['post_author'] = absint( $post_data['post_author'] );
        if ( ! empty( $post_data['post_author'] ) && $post_data['post_author'] != $user->ID ) {
            if ( ! current_user_can( $post_type->cap->edit_others_posts ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to create posts as this user.' ) );
            }

            $author = get_userdata( $post_data['post_author'] );

            if ( ! $author ) {
                return new IXR_Error( 404, __( 'Invalid author ID.' ) );
            }
        } else {
            $post_data['post_author'] = $user->ID;
        }

        if ( 'open' !== $post_data['comment_status'] && 'closed' !== $post_data['comment_status'] ) {
            unset( $post_data['comment_status'] );
        }

        if ( 'open' !== $post_data['ping_status'] && 'closed' !== $post_data['ping_status'] ) {
            unset( $post_data['ping_status'] );
        }

        // Do some timestamp voodoo.
        if ( ! empty( $post_data['post_date_gmt'] ) ) {
            // We know this is supposed to be GMT, so we're going to slap that Z on there by force.
            $dateCreated = rtrim( $post_data['post_date_gmt']->getIso(), 'Z' ) . 'Z';
        } elseif ( ! empty( $post_data['post_date'] ) ) {
            $dateCreated = $post_data['post_date']->getIso();
        }

        // Default to not flagging the post date to be edited unless it's intentional.
        $post_data['edit_date'] = false;

        if ( ! empty( $dateCreated ) ) {
            $post_data['post_date']     = iso8601_to_datetime( $dateCreated );
            $post_data['post_date_gmt'] = iso8601_to_datetime( $dateCreated, 'gmt' );

            // Flag the post date to be edited.
            $post_data['edit_date'] = true;
        }

        if ( ! isset( $post_data['ID'] ) ) {
            $post_data['ID'] = get_default_post_to_edit( $post_data['post_type'], true )->ID;
        }
        $post_id = $post_data['ID'];

        if ( 'post' === $post_data['post_type'] ) {
            $error = $this->_toggle_sticky( $post_data, $update );
            if ( $error ) {
                return $error;
            }
        }

        if ( isset( $post_data['post_thumbnail'] ) ) {
            // Empty value deletes, non-empty value adds/updates.
            if ( ! $post_data['post_thumbnail'] ) {
                delete_post_thumbnail( $post_id );
            } elseif ( ! get_post( absint( $post_data['post_thumbnail'] ) ) ) {
                return new IXR_Error( 404, __( 'Invalid attachment ID.' ) );
            }
            set_post_thumbnail( $post_id, $post_data['post_thumbnail'] );
            unset( $content_struct['post_thumbnail'] );
        }

        if ( isset( $post_data['custom_fields'] ) ) {
            $this->set_custom_fields( $post_id, $post_data['custom_fields'] );
        }

        if ( isset( $post_data['terms'] ) || isset( $post_data['terms_names'] ) ) {
            $post_type_taxonomies = get_object_taxonomies( $post_data['post_type'], 'objects' );

            // Accumulate term IDs from terms and terms_names.
            $terms = array();

            // First validate the terms specified by ID.
            if ( isset( $post_data['terms'] ) && is_array( $post_data['terms'] ) ) {
                $taxonomies = array_keys( $post_data['terms'] );

                // Validating term IDs.
                foreach ( $taxonomies as $taxonomy ) {
                    if ( ! array_key_exists( $taxonomy, $post_type_taxonomies ) ) {
                        return new IXR_Error( 401, __( 'Sorry, one of the given taxonomies is not supported by the post type.' ) );
                    }

                    if ( ! current_user_can( $post_type_taxonomies[ $taxonomy ]->cap->assign_terms ) ) {
                        return new IXR_Error( 401, __( 'Sorry, you are not allowed to assign a term to one of the given taxonomies.' ) );
                    }

                    $term_ids           = $post_data['terms'][ $taxonomy ];
                    $terms[ $taxonomy ] = array();
                    foreach ( $term_ids as $term_id ) {
                        $term = get_term_by( 'id', $term_id, $taxonomy );

                        if ( ! $term ) {
                            return new IXR_Error( 403, __( 'Invalid term ID.' ) );
                        }

                        $terms[ $taxonomy ][] = (int) $term_id;
                    }
                }
            }

            // Now validate terms specified by name.
            if ( isset( $post_data['terms_names'] ) && is_array( $post_data['terms_names'] ) ) {
                $taxonomies = array_keys( $post_data['terms_names'] );

                foreach ( $taxonomies as $taxonomy ) {
                    if ( ! array_key_exists( $taxonomy, $post_type_taxonomies ) ) {
                        return new IXR_Error( 401, __( 'Sorry, one of the given taxonomies is not supported by the post type.' ) );
                    }

                    if ( ! current_user_can( $post_type_taxonomies[ $taxonomy ]->cap->assign_terms ) ) {
                        return new IXR_Error( 401, __( 'Sorry, you are not allowed to assign a term to one of the given taxonomies.' ) );
                    }

                    /*
                     * For hierarchical taxonomies, we can't assign a term when multiple terms
                     * in the hierarchy share the same name.
                     */
                    $ambiguous_terms = array();
                    if ( is_taxonomy_hierarchical( $taxonomy ) ) {
                        $tax_term_names = get_terms(
                            array(
                                'taxonomy'   => $taxonomy,
                                'fields'     => 'names',
                                'hide_empty' => false,
                            )
                        );

                        // Count the number of terms with the same name.
                        $tax_term_names_count = array_count_values( $tax_term_names );

                        // Filter out non-ambiguous term names.
                        $ambiguous_tax_term_counts = array_filter( $tax_term_names_count, array( $this, '_is_greater_than_one' ) );

                        $ambiguous_terms = array_keys( $ambiguous_tax_term_counts );
                    }

                    $term_names = $post_data['terms_names'][ $taxonomy ];
                    foreach ( $term_names as $term_name ) {
                        if ( in_array( $term_name, $ambiguous_terms, true ) ) {
                            return new IXR_Error( 401, __( 'Ambiguous term name used in a hierarchical taxonomy. Please use term ID instead.' ) );
                        }

                        $term = get_term_by( 'name', $term_name, $taxonomy );

                        if ( ! $term ) {
                            // Term doesn't exist, so check that the user is allowed to create new terms.
                            if ( ! current_user_can( $post_type_taxonomies[ $taxonomy ]->cap->edit_terms ) ) {
                                return new IXR_Error( 401, __( 'Sorry, you are not allowed to add a term to one of the given taxonomies.' ) );
                            }

                            // Create the new term.
                            $term_info = wp_insert_term( $term_name, $taxonomy );
                            if ( is_wp_error( $term_info ) ) {
                                return new IXR_Error( 500, $term_info->get_error_message() );
                            }

                            $terms[ $taxonomy ][] = (int) $term_info['term_id'];
                        } else {
                            $terms[ $taxonomy ][] = (int) $term->term_id;
                        }
                    }
                }
            }

            $post_data['tax_input'] = $terms;
            unset( $post_data['terms'], $post_data['terms_names'] );
        }

        if ( isset( $post_data['post_format'] ) ) {
            $format = set_post_format( $post_id, $post_data['post_format'] );

            if ( is_wp_error( $format ) ) {
                return new IXR_Error( 500, $format->get_error_message() );
            }

            unset( $post_data['post_format'] );
        }

        // Handle enclosures.
        $enclosure = isset( $post_data['enclosure'] ) ? $post_data['enclosure'] : null;
        $this->add_enclosure_if_new( $post_id, $enclosure );

        $this->attach_uploads( $post_id, $post_data['post_content'] );

        /**
         * Filters post data array to be inserted via XML-RPC.
         *
         * @since 3.4.0
         *
         * @param array $post_data      Parsed array of post data.
         * @param array $content_struct Post data array.
         */
        $post_data = apply_filters( 'xmlrpc_wp_insert_post_data', $post_data, $content_struct );

        // Remove all null values to allow for using the insert/update post default values for those keys instead.
        $post_data = array_filter(
            $post_data,
            static function ( $value ) {
                return null !== $value;
            }
        );

        $post_id = $update ? wp_update_post( $post_data, true ) : wp_insert_post( $post_data, true );
        if ( is_wp_error( $post_id ) ) {
            return new IXR_Error( 500, $post_id->get_error_message() );
        }

        if ( ! $post_id ) {
            if ( $update ) {
                return new IXR_Error( 401, __( 'Sorry, the post could not be updated.' ) );
            } else {
                return new IXR_Error( 401, __( 'Sorry, the post could not be created.' ) );
            }
        }

        return (string) $post_id;
    }

    /**
     * Edits a post for any registered post type.
     *
     * The $content_struct parameter only needs to contain fields that
     * should be changed. All other fields will retain their existing values.
     *
     * @since 3.4.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Post ID.
     *     @type array  $4 Extra content arguments.
     * }
     * @return true|IXR_Error True on success, IXR_Error on failure.
     */
    public function wp_editPost( $args ) {
        if ( ! $this->minimum_args( $args, 5 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $post_id        = (int) $args[3];
        $content_struct = $args[4];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.editPost', $args, $this );

        $post = get_post( $post_id, ARRAY_A );

        if ( empty( $post['ID'] ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( isset( $content_struct['if_not_modified_since'] ) ) {
            // If the post has been modified since the date provided, return an error.
            if ( mysql2date( 'U', $post['post_modified_gmt'] ) > $content_struct['if_not_modified_since']->getTimestamp() ) {
                return new IXR_Error( 409, __( 'There is a revision of this post that is more recent.' ) );
            }
        }

        // Convert the date field back to IXR form.
        $post['post_date'] = $this->_convert_date( $post['post_date'] );

        /*
         * Ignore the existing GMT date if it is empty or a non-GMT date was supplied in $content_struct,
         * since _insert_post() will ignore the non-GMT date if the GMT date is set.
         */
        if ( '0000-00-00 00:00:00' === $post['post_date_gmt'] || isset( $content_struct['post_date'] ) ) {
            unset( $post['post_date_gmt'] );
        } else {
            $post['post_date_gmt'] = $this->_convert_date( $post['post_date_gmt'] );
        }

        /*
         * If the API client did not provide 'post_date', then we must not perpetuate the value that
         * was stored in the database, or it will appear to be an intentional edit. Conveying it here
         * as if it was coming from the API client will cause an otherwise zeroed out 'post_date_gmt'
         * to get set with the value that was originally stored in the database when the draft was created.
         */
        if ( ! isset( $content_struct['post_date'] ) ) {
            unset( $post['post_date'] );
        }

        $this->escape( $post );
        $merged_content_struct = array_merge( $post, $content_struct );

        $retval = $this->_insert_post( $user, $merged_content_struct );
        if ( $retval instanceof IXR_Error ) {
            return $retval;
        }

        return true;
    }

    /**
     * Deletes a post for any registered post type.
     *
     * @since 3.4.0
     *
     * @see wp_delete_post()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Post ID.
     * }
     * @return true|IXR_Error True on success, IXR_Error instance on failure.
     */
    public function wp_deletePost( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $post_id  = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.deletePost', $args, $this );

        $post = get_post( $post_id, ARRAY_A );
        if ( empty( $post['ID'] ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'delete_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to delete this post.' ) );
        }

        $result = wp_delete_post( $post_id );

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, the post could not be deleted.' ) );
        }

        return true;
    }

    /**
     * Retrieves a post.
     *
     * @since 3.4.0
     *
     * The optional $fields parameter specifies what fields will be included
     * in the response array. This should be a list of field names. 'post_id' will
     * always be included in the response regardless of the value of $fields.
     *
     * Instead of, or in addition to, individual field names, conceptual group
     * names can be used to specify multiple fields. The available conceptual
     * groups are 'post' (all basic fields), 'taxonomies', 'custom_fields',
     * and 'enclosure'.
     *
     * @see get_post()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Post ID.
     *     @type array  $4 Optional. The subset of post type fields to return.
     * }
     * @return array|IXR_Error Array contains (based on $fields parameter):
     *  - 'post_id'
     *  - 'post_title'
     *  - 'post_date'
     *  - 'post_date_gmt'
     *  - 'post_modified'
     *  - 'post_modified_gmt'
     *  - 'post_status'
     *  - 'post_type'
     *  - 'post_name'
     *  - 'post_author'
     *  - 'post_password'
     *  - 'post_excerpt'
     *  - 'post_content'
     *  - 'link'
     *  - 'comment_status'
     *  - 'ping_status'
     *  - 'sticky'
     *  - 'custom_fields'
     *  - 'terms'
     *  - 'categories'
     *  - 'tags'
     *  - 'enclosure'
     */
    public function wp_getPost( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $post_id  = (int) $args[3];

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /**
             * Filters the default post query fields used by the given XML-RPC method.
             *
             * @since 3.4.0
             *
             * @param array  $fields An array of post fields to retrieve. By default,
             *                       contains 'post', 'terms', and 'custom_fields'.
             * @param string $method Method name.
             */
            $fields = apply_filters( 'xmlrpc_default_post_fields', array( 'post', 'terms', 'custom_fields' ), 'wp.getPost' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPost', $args, $this );

        $post = get_post( $post_id, ARRAY_A );

        if ( empty( $post['ID'] ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        return $this->_prepare_post( $post, $fields );
    }

    /**
     * Retrieves posts.
     *
     * @since 3.4.0
     *
     * @see wp_get_recent_posts()
     * @see wp_getPost() for more on `$fields`
     * @see get_posts() for more on `$filter` values
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. Modifies the query used to retrieve posts. Accepts 'post_type',
     *                     'post_status', 'number', 'offset', 'orderby', 's', and 'order'.
     *                     Default empty array.
     *     @type array  $4 Optional. The subset of post type fields to return in the response array.
     * }
     * @return array|IXR_Error Array containing a collection of posts.
     */
    public function wp_getPosts( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $filter   = isset( $args[3] ) ? $args[3] : array();

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
            $fields = apply_filters( 'xmlrpc_default_post_fields', array( 'post', 'terms', 'custom_fields' ), 'wp.getPosts' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPosts', $args, $this );

        $query = array();

        if ( isset( $filter['post_type'] ) ) {
            $post_type = get_post_type_object( $filter['post_type'] );
            if ( ! ( (bool) $post_type ) ) {
                return new IXR_Error( 403, __( 'Invalid post type.' ) );
            }
        } else {
            $post_type = get_post_type_object( 'post' );
        }

        if ( ! current_user_can( $post_type->cap->edit_posts ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit posts in this post type.' ) );
        }

        $query['post_type'] = $post_type->name;

        if ( isset( $filter['post_status'] ) ) {
            $query['post_status'] = $filter['post_status'];
        }

        if ( isset( $filter['number'] ) ) {
            $query['numberposts'] = absint( $filter['number'] );
        }

        if ( isset( $filter['offset'] ) ) {
            $query['offset'] = absint( $filter['offset'] );
        }

        if ( isset( $filter['orderby'] ) ) {
            $query['orderby'] = $filter['orderby'];

            if ( isset( $filter['order'] ) ) {
                $query['order'] = $filter['order'];
            }
        }

        if ( isset( $filter['s'] ) ) {
            $query['s'] = $filter['s'];
        }

        $posts_list = wp_get_recent_posts( $query );

        if ( ! $posts_list ) {
            return array();
        }

        // Holds all the posts data.
        $struct = array();

        foreach ( $posts_list as $post ) {
            if ( ! current_user_can( 'edit_post', $post['ID'] ) ) {
                continue;
            }

            $struct[] = $this->_prepare_post( $post, $fields );
        }

        return $struct;
    }

    /**
     * Creates a new term.
     *
     * @since 3.4.0
     *
     * @see wp_insert_term()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Content struct for adding a new term. The struct must contain
     *                     the term 'name' and 'taxonomy'. Optional accepted values include
     *                     'parent', 'description', and 'slug'.
     * }
     * @return int|IXR_Error The term ID on success, or an IXR_Error object on failure.
     */
    public function wp_newTerm( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $content_struct = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.newTerm', $args, $this );

        if ( ! taxonomy_exists( $content_struct['taxonomy'] ) ) {
            return new IXR_Error( 403, __( 'Invalid taxonomy.' ) );
        }

        $taxonomy = get_taxonomy( $content_struct['taxonomy'] );

        if ( ! current_user_can( $taxonomy->cap->edit_terms ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to create terms in this taxonomy.' ) );
        }

        $taxonomy = (array) $taxonomy;

        // Hold the data of the term.
        $term_data = array();

        $term_data['name'] = trim( $content_struct['name'] );
        if ( empty( $term_data['name'] ) ) {
            return new IXR_Error( 403, __( 'The term name cannot be empty.' ) );
        }

        if ( isset( $content_struct['parent'] ) ) {
            if ( ! $taxonomy['hierarchical'] ) {
                return new IXR_Error( 403, __( 'This taxonomy is not hierarchical.' ) );
            }

            $parent_term_id = (int) $content_struct['parent'];
            $parent_term    = get_term( $parent_term_id, $taxonomy['name'] );

            if ( is_wp_error( $parent_term ) ) {
                return new IXR_Error( 500, $parent_term->get_error_message() );
            }

            if ( ! $parent_term ) {
                return new IXR_Error( 403, __( 'Parent term does not exist.' ) );
            }

            $term_data['parent'] = $content_struct['parent'];
        }

        if ( isset( $content_struct['description'] ) ) {
            $term_data['description'] = $content_struct['description'];
        }

        if ( isset( $content_struct['slug'] ) ) {
            $term_data['slug'] = $content_struct['slug'];
        }

        $term = wp_insert_term( $term_data['name'], $taxonomy['name'], $term_data );

        if ( is_wp_error( $term ) ) {
            return new IXR_Error( 500, $term->get_error_message() );
        }

        if ( ! $term ) {
            return new IXR_Error( 500, __( 'Sorry, the term could not be created.' ) );
        }

        // Add term meta.
        if ( isset( $content_struct['custom_fields'] ) ) {
            $this->set_term_custom_fields( $term['term_id'], $content_struct['custom_fields'] );
        }

        return (string) $term['term_id'];
    }

    /**
     * Edits a term.
     *
     * @since 3.4.0
     *
     * @see wp_update_term()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Term ID.
     *     @type array  $4 Content struct for editing a term. The struct must contain the
     *                     term 'taxonomy'. Optional accepted values include 'name', 'parent',
     *                     'description', and 'slug'.
     * }
     * @return true|IXR_Error True on success, IXR_Error instance on failure.
     */
    public function wp_editTerm( $args ) {
        if ( ! $this->minimum_args( $args, 5 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $term_id        = (int) $args[3];
        $content_struct = $args[4];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.editTerm', $args, $this );

        if ( ! taxonomy_exists( $content_struct['taxonomy'] ) ) {
            return new IXR_Error( 403, __( 'Invalid taxonomy.' ) );
        }

        $taxonomy = get_taxonomy( $content_struct['taxonomy'] );

        $taxonomy = (array) $taxonomy;

        // Hold the data of the term.
        $term_data = array();

        $term = get_term( $term_id, $content_struct['taxonomy'] );

        if ( is_wp_error( $term ) ) {
            return new IXR_Error( 500, $term->get_error_message() );
        }

        if ( ! $term ) {
            return new IXR_Error( 404, __( 'Invalid term ID.' ) );
        }

        if ( ! current_user_can( 'edit_term', $term_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this term.' ) );
        }

        if ( isset( $content_struct['name'] ) ) {
            $term_data['name'] = trim( $content_struct['name'] );

            if ( empty( $term_data['name'] ) ) {
                return new IXR_Error( 403, __( 'The term name cannot be empty.' ) );
            }
        }

        if ( ! empty( $content_struct['parent'] ) ) {
            if ( ! $taxonomy['hierarchical'] ) {
                return new IXR_Error( 403, __( 'Cannot set parent term, taxonomy is not hierarchical.' ) );
            }

            $parent_term_id = (int) $content_struct['parent'];
            $parent_term    = get_term( $parent_term_id, $taxonomy['name'] );

            if ( is_wp_error( $parent_term ) ) {
                return new IXR_Error( 500, $parent_term->get_error_message() );
            }

            if ( ! $parent_term ) {
                return new IXR_Error( 403, __( 'Parent term does not exist.' ) );
            }

            $term_data['parent'] = $content_struct['parent'];
        }

        if ( isset( $content_struct['description'] ) ) {
            $term_data['description'] = $content_struct['description'];
        }

        if ( isset( $content_struct['slug'] ) ) {
            $term_data['slug'] = $content_struct['slug'];
        }

        $term = wp_update_term( $term_id, $taxonomy['name'], $term_data );

        if ( is_wp_error( $term ) ) {
            return new IXR_Error( 500, $term->get_error_message() );
        }

        if ( ! $term ) {
            return new IXR_Error( 500, __( 'Sorry, editing the term failed.' ) );
        }

        // Update term meta.
        if ( isset( $content_struct['custom_fields'] ) ) {
            $this->set_term_custom_fields( $term_id, $content_struct['custom_fields'] );
        }

        return true;
    }

    /**
     * Deletes a term.
     *
     * @since 3.4.0
     *
     * @see wp_delete_term()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type string $3 Taxonomy name.
     *     @type int    $4 Term ID.
     * }
     * @return true|IXR_Error True on success, IXR_Error instance on failure.
     */
    public function wp_deleteTerm( $args ) {
        if ( ! $this->minimum_args( $args, 5 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $taxonomy = $args[3];
        $term_id  = (int) $args[4];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.deleteTerm', $args, $this );

        if ( ! taxonomy_exists( $taxonomy ) ) {
            return new IXR_Error( 403, __( 'Invalid taxonomy.' ) );
        }

        $taxonomy = get_taxonomy( $taxonomy );
        $term     = get_term( $term_id, $taxonomy->name );

        if ( is_wp_error( $term ) ) {
            return new IXR_Error( 500, $term->get_error_message() );
        }

        if ( ! $term ) {
            return new IXR_Error( 404, __( 'Invalid term ID.' ) );
        }

        if ( ! current_user_can( 'delete_term', $term_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to delete this term.' ) );
        }

        $result = wp_delete_term( $term_id, $taxonomy->name );

        if ( is_wp_error( $result ) ) {
            return new IXR_Error( 500, $term->get_error_message() );
        }

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, deleting the term failed.' ) );
        }

        return $result;
    }

    /**
     * Retrieves a term.
     *
     * @since 3.4.0
     *
     * @see get_term()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type string $3 Taxonomy name.
     *     @type int    $4 Term ID.
     * }
     * @return array|IXR_Error IXR_Error on failure, array on success, containing:
     *  - 'term_id'
     *  - 'name'
     *  - 'slug'
     *  - 'term_group'
     *  - 'term_taxonomy_id'
     *  - 'taxonomy'
     *  - 'description'
     *  - 'parent'
     *  - 'count'
     */
    public function wp_getTerm( $args ) {
        if ( ! $this->minimum_args( $args, 5 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $taxonomy = $args[3];
        $term_id  = (int) $args[4];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getTerm', $args, $this );

        if ( ! taxonomy_exists( $taxonomy ) ) {
            return new IXR_Error( 403, __( 'Invalid taxonomy.' ) );
        }

        $taxonomy = get_taxonomy( $taxonomy );

        $term = get_term( $term_id, $taxonomy->name, ARRAY_A );

        if ( is_wp_error( $term ) ) {
            return new IXR_Error( 500, $term->get_error_message() );
        }

        if ( ! $term ) {
            return new IXR_Error( 404, __( 'Invalid term ID.' ) );
        }

        if ( ! current_user_can( 'assign_term', $term_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to assign this term.' ) );
        }

        return $this->_prepare_term( $term );
    }

    /**
     * Retrieves all terms for a taxonomy.
     *
     * @since 3.4.0
     *
     * The optional $filter parameter modifies the query used to retrieve terms.
     * Accepted keys are 'number', 'offset', 'orderby', 'order', 'hide_empty', and 'search'.
     *
     * @see get_terms()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type string $3 Taxonomy name.
     *     @type array  $4 Optional. Modifies the query used to retrieve posts. Accepts 'number',
     *                     'offset', 'orderby', 'order', 'hide_empty', and 'search'. Default empty array.
     * }
     * @return array|IXR_Error An associative array of terms data on success, IXR_Error instance otherwise.
     */
    public function wp_getTerms( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $taxonomy = $args[3];
        $filter   = isset( $args[4] ) ? $args[4] : array();

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getTerms', $args, $this );

        if ( ! taxonomy_exists( $taxonomy ) ) {
            return new IXR_Error( 403, __( 'Invalid taxonomy.' ) );
        }

        $taxonomy = get_taxonomy( $taxonomy );

        if ( ! current_user_can( $taxonomy->cap->assign_terms ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to assign terms in this taxonomy.' ) );
        }

        $query = array( 'taxonomy' => $taxonomy->name );

        if ( isset( $filter['number'] ) ) {
            $query['number'] = absint( $filter['number'] );
        }

        if ( isset( $filter['offset'] ) ) {
            $query['offset'] = absint( $filter['offset'] );
        }

        if ( isset( $filter['orderby'] ) ) {
            $query['orderby'] = $filter['orderby'];

            if ( isset( $filter['order'] ) ) {
                $query['order'] = $filter['order'];
            }
        }

        if ( isset( $filter['hide_empty'] ) ) {
            $query['hide_empty'] = $filter['hide_empty'];
        } else {
            $query['get'] = 'all';
        }

        if ( isset( $filter['search'] ) ) {
            $query['search'] = $filter['search'];
        }

        $terms = get_terms( $query );

        if ( is_wp_error( $terms ) ) {
            return new IXR_Error( 500, $terms->get_error_message() );
        }

        $struct = array();

        foreach ( $terms as $term ) {
            $struct[] = $this->_prepare_term( $term );
        }

        return $struct;
    }

    /**
     * Retrieves a taxonomy.
     *
     * @since 3.4.0
     *
     * @see get_taxonomy()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type string $3 Taxonomy name.
     *     @type array  $4 Optional. Array of taxonomy fields to limit to in the return.
     *                     Accepts 'labels', 'cap', 'menu', and 'object_type'.
     *                     Default empty array.
     * }
     * @return array|IXR_Error An array of taxonomy data on success, IXR_Error instance otherwise.
     */
    public function wp_getTaxonomy( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $taxonomy = $args[3];

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /**
             * Filters the default taxonomy query fields used by the given XML-RPC method.
             *
             * @since 3.4.0
             *
             * @param array  $fields An array of taxonomy fields to retrieve. By default,
             *                       contains 'labels', 'cap', and 'object_type'.
             * @param string $method The method name.
             */
            $fields = apply_filters( 'xmlrpc_default_taxonomy_fields', array( 'labels', 'cap', 'object_type' ), 'wp.getTaxonomy' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getTaxonomy', $args, $this );

        if ( ! taxonomy_exists( $taxonomy ) ) {
            return new IXR_Error( 403, __( 'Invalid taxonomy.' ) );
        }

        $taxonomy = get_taxonomy( $taxonomy );

        if ( ! current_user_can( $taxonomy->cap->assign_terms ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to assign terms in this taxonomy.' ) );
        }

        return $this->_prepare_taxonomy( $taxonomy, $fields );
    }

    /**
     * Retrieves all taxonomies.
     *
     * @since 3.4.0
     *
     * @see get_taxonomies()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. An array of arguments for retrieving taxonomies.
     *     @type array  $4 Optional. The subset of taxonomy fields to return.
     * }
     * @return array|IXR_Error An associative array of taxonomy data with returned fields determined
     *                         by `$fields`, or an IXR_Error instance on failure.
     */
    public function wp_getTaxonomies( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $filter   = isset( $args[3] ) ? $args[3] : array( 'public' => true );

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
            $fields = apply_filters( 'xmlrpc_default_taxonomy_fields', array( 'labels', 'cap', 'object_type' ), 'wp.getTaxonomies' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getTaxonomies', $args, $this );

        $taxonomies = get_taxonomies( $filter, 'objects' );

        // Holds all the taxonomy data.
        $struct = array();

        foreach ( $taxonomies as $taxonomy ) {
            // Capability check for post types.
            if ( ! current_user_can( $taxonomy->cap->assign_terms ) ) {
                continue;
            }

            $struct[] = $this->_prepare_taxonomy( $taxonomy, $fields );
        }

        return $struct;
    }

    /**
     * Retrieves a user.
     *
     * The optional $fields parameter specifies what fields will be included
     * in the response array. This should be a list of field names. 'user_id' will
     * always be included in the response regardless of the value of $fields.
     *
     * Instead of, or in addition to, individual field names, conceptual group
     * names can be used to specify multiple fields. The available conceptual
     * groups are 'basic' and 'all'.
     *
     * @uses get_userdata()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 User ID.
     *     @type array  $4 Optional. Array of fields to return.
     * }
     * @return array|IXR_Error Array contains (based on $fields parameter):
     *  - 'user_id'
     *  - 'username'
     *  - 'first_name'
     *  - 'last_name'
     *  - 'registered'
     *  - 'bio'
     *  - 'email'
     *  - 'nickname'
     *  - 'nicename'
     *  - 'url'
     *  - 'display_name'
     *  - 'roles'
     */
    public function wp_getUser( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $user_id  = (int) $args[3];

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /**
             * Filters the default user query fields used by the given XML-RPC method.
             *
             * @since 3.5.0
             *
             * @param array  $fields An array of user fields to retrieve. By default, contains 'all'.
             * @param string $method The method name.
             */
            $fields = apply_filters( 'xmlrpc_default_user_fields', array( 'all' ), 'wp.getUser' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getUser', $args, $this );

        if ( ! current_user_can( 'edit_user', $user_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this user.' ) );
        }

        $user_data = get_userdata( $user_id );

        if ( ! $user_data ) {
            return new IXR_Error( 404, __( 'Invalid user ID.' ) );
        }

        return $this->_prepare_user( $user_data, $fields );
    }

    /**
     * Retrieves users.
     *
     * The optional $filter parameter modifies the query used to retrieve users.
     * Accepted keys are 'number' (default: 50), 'offset' (default: 0), 'role',
     * 'who', 'orderby', and 'order'.
     *
     * The optional $fields parameter specifies what fields will be included
     * in the response array.
     *
     * @uses get_users()
     * @see wp_getUser() for more on $fields and return values
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. Arguments for the user query.
     *     @type array  $4 Optional. Fields to return.
     * }
     * @return array|IXR_Error users data
     */
    public function wp_getUsers( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $filter   = isset( $args[3] ) ? $args[3] : array();

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
            $fields = apply_filters( 'xmlrpc_default_user_fields', array( 'all' ), 'wp.getUsers' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getUsers', $args, $this );

        if ( ! current_user_can( 'list_users' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to list users.' ) );
        }

        $query = array( 'fields' => 'all_with_meta' );

        $query['number'] = ( isset( $filter['number'] ) ) ? absint( $filter['number'] ) : 50;
        $query['offset'] = ( isset( $filter['offset'] ) ) ? absint( $filter['offset'] ) : 0;

        if ( isset( $filter['orderby'] ) ) {
            $query['orderby'] = $filter['orderby'];

            if ( isset( $filter['order'] ) ) {
                $query['order'] = $filter['order'];
            }
        }

        if ( isset( $filter['role'] ) ) {
            if ( get_role( $filter['role'] ) === null ) {
                return new IXR_Error( 403, __( 'Invalid role.' ) );
            }

            $query['role'] = $filter['role'];
        }

        if ( isset( $filter['who'] ) ) {
            $query['who'] = $filter['who'];
        }

        $users = get_users( $query );

        $_users = array();
        foreach ( $users as $user_data ) {
            if ( current_user_can( 'edit_user', $user_data->ID ) ) {
                $_users[] = $this->_prepare_user( $user_data, $fields );
            }
        }
        return $_users;
    }

    /**
     * Retrieves information about the requesting user.
     *
     * @uses get_userdata()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username
     *     @type string $2 Password
     *     @type array  $3 Optional. Fields to return.
     * }
     * @return array|IXR_Error (@see wp_getUser)
     */
    public function wp_getProfile( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        if ( isset( $args[3] ) ) {
            $fields = $args[3];
        } else {
            /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
            $fields = apply_filters( 'xmlrpc_default_user_fields', array( 'all' ), 'wp.getProfile' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getProfile', $args, $this );

        if ( ! current_user_can( 'edit_user', $user->ID ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit your profile.' ) );
        }

        $user_data = get_userdata( $user->ID );

        return $this->_prepare_user( $user_data, $fields );
    }

    /**
     * Edits user's profile.
     *
     * @uses wp_update_user()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Content struct. It can optionally contain:
     *      - 'first_name'
     *      - 'last_name'
     *      - 'website'
     *      - 'display_name'
     *      - 'nickname'
     *      - 'nicename'
     *      - 'bio'
     * }
     * @return true|IXR_Error True, on success.
     */
    public function wp_editProfile( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $content_struct = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.editProfile', $args, $this );

        if ( ! current_user_can( 'edit_user', $user->ID ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit your profile.' ) );
        }

        // Holds data of the user.
        $user_data       = array();
        $user_data['ID'] = $user->ID;

        // Only set the user details if they were given.
        if ( isset( $content_struct['first_name'] ) ) {
            $user_data['first_name'] = $content_struct['first_name'];
        }

        if ( isset( $content_struct['last_name'] ) ) {
            $user_data['last_name'] = $content_struct['last_name'];
        }

        if ( isset( $content_struct['url'] ) ) {
            $user_data['user_url'] = $content_struct['url'];
        }

        if ( isset( $content_struct['display_name'] ) ) {
            $user_data['display_name'] = $content_struct['display_name'];
        }

        if ( isset( $content_struct['nickname'] ) ) {
            $user_data['nickname'] = $content_struct['nickname'];
        }

        if ( isset( $content_struct['nicename'] ) ) {
            $user_data['user_nicename'] = $content_struct['nicename'];
        }

        if ( isset( $content_struct['bio'] ) ) {
            $user_data['description'] = $content_struct['bio'];
        }

        $result = wp_update_user( $user_data );

        if ( is_wp_error( $result ) ) {
            return new IXR_Error( 500, $result->get_error_message() );
        }

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, the user could not be updated.' ) );
        }

        return true;
    }

    /**
     * Retrieves a page.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type int    $1 Page ID.
     *     @type string $2 Username.
     *     @type string $3 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPage( $args ) {
        $this->escape( $args );

        $page_id  = (int) $args[1];
        $username = $args[2];
        $password = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        $page = get_post( $page_id );
        if ( ! $page ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_page', $page_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this page.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPage', $args, $this );

        // If we found the page then format the data.
        if ( $page->ID && ( 'page' === $page->post_type ) ) {
            return $this->_prepare_page( $page );
        } else {
            // If the page doesn't exist, indicate that.
            return new IXR_Error( 404, __( 'Sorry, no such page.' ) );
        }
    }

    /**
     * Retrieves Pages.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Optional. Number of pages. Default 10.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPages( $args ) {
        $this->escape( $args );

        $username  = $args[1];
        $password  = $args[2];
        $num_pages = isset( $args[3] ) ? (int) $args[3] : 10;

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_pages' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit pages.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPages', $args, $this );

        $pages     = get_posts(
            array(
                'post_type'   => 'page',
                'post_status' => 'any',
                'numberposts' => $num_pages,
            )
        );
        $num_pages = count( $pages );

        // If we have pages, put together their info.
        if ( $num_pages >= 1 ) {
            $pages_struct = array();

            foreach ( $pages as $page ) {
                if ( current_user_can( 'edit_page', $page->ID ) ) {
                    $pages_struct[] = $this->_prepare_page( $page );
                }
            }

            return $pages_struct;
        }

        return array();
    }

    /**
     * Creates a new page.
     *
     * @since 2.2.0
     *
     * @see wp_xmlrpc_server::mw_newPost()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Content struct.
     * }
     * @return int|IXR_Error
     */
    public function wp_newPage( $args ) {
        // Items not escaped here will be escaped in wp_newPost().
        $username = $this->escape( $args[1] );
        $password = $this->escape( $args[2] );

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.newPage', $args, $this );

        // Mark this as content for a page.
        $args[3]['post_type'] = 'page';

        // Let mw_newPost() do all of the heavy lifting.
        return $this->mw_newPost( $args );
    }

    /**
     * Deletes a page.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Page ID.
     * }
     * @return true|IXR_Error True, if success.
     */
    public function wp_deletePage( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $page_id  = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.deletePage', $args, $this );

        /*
         * Get the current page based on the 'page_id' and
         * make sure it is a page and not a post.
         */
        $actual_page = get_post( $page_id, ARRAY_A );
        if ( ! $actual_page || ( 'page' !== $actual_page['post_type'] ) ) {
            return new IXR_Error( 404, __( 'Sorry, no such page.' ) );
        }

        // Make sure the user can delete pages.
        if ( ! current_user_can( 'delete_page', $page_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to delete this page.' ) );
        }

        // Attempt to delete the page.
        $result = wp_delete_post( $page_id );
        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Failed to delete the page.' ) );
        }

        /**
         * Fires after a page has been successfully deleted via XML-RPC.
         *
         * @since 3.4.0
         *
         * @param int   $page_id ID of the deleted page.
         * @param array $args    An array of arguments to delete the page.
         */
        do_action( 'xmlrpc_call_success_wp_deletePage', $page_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return true;
    }

    /**
     * Edits a page.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type int    $1 Page ID.
     *     @type string $2 Username.
     *     @type string $3 Password.
     *     @type string $4 Content.
     *     @type int    $5 Publish flag. 0 for draft, 1 for publish.
     * }
     * @return array|IXR_Error
     */
    public function wp_editPage( $args ) {
        // Items will be escaped in mw_editPost().
        $page_id  = (int) $args[1];
        $username = $args[2];
        $password = $args[3];
        $content  = $args[4];
        $publish  = $args[5];

        $escaped_username = $this->escape( $username );
        $escaped_password = $this->escape( $password );

        $user = $this->login( $escaped_username, $escaped_password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.editPage', $args, $this );

        // Get the page data and make sure it is a page.
        $actual_page = get_post( $page_id, ARRAY_A );
        if ( ! $actual_page || ( 'page' !== $actual_page['post_type'] ) ) {
            return new IXR_Error( 404, __( 'Sorry, no such page.' ) );
        }

        // Make sure the user is allowed to edit pages.
        if ( ! current_user_can( 'edit_page', $page_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this page.' ) );
        }

        // Mark this as content for a page.
        $content['post_type'] = 'page';

        // Arrange args in the way mw_editPost() understands.
        $args = array(
            $page_id,
            $username,
            $password,
            $content,
            $publish,
        );

        // Let mw_editPost() do all of the heavy lifting.
        return $this->mw_editPost( $args );
    }

    /**
     * Retrieves page list.
     *
     * @since 2.2.0
     *
     * @global wpdb $wpdb WordPress database abstraction object.
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPageList( $args ) {
        global $wpdb;

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_pages' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit pages.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPageList', $args, $this );

        // Get list of page IDs and titles.
        $page_list = $wpdb->get_results(
            "
            SELECT ID page_id,
                post_title page_title,
                post_parent page_parent_id,
                post_date_gmt,
                post_date,
                post_status
            FROM {$wpdb->posts}
            WHERE post_type = 'page'
            ORDER BY ID
        "
        );

        // The date needs to be formatted properly.
        $num_pages = count( $page_list );
        for ( $i = 0; $i < $num_pages; $i++ ) {
            $page_list[ $i ]->dateCreated      = $this->_convert_date( $page_list[ $i ]->post_date );
            $page_list[ $i ]->date_created_gmt = $this->_convert_date_gmt( $page_list[ $i ]->post_date_gmt, $page_list[ $i ]->post_date );

            unset( $page_list[ $i ]->post_date_gmt );
            unset( $page_list[ $i ]->post_date );
            unset( $page_list[ $i ]->post_status );
        }

        return $page_list;
    }

    /**
     * Retrieves authors list.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getAuthors( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit posts.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getAuthors', $args, $this );

        $authors = array();
        foreach ( get_users( array( 'fields' => array( 'ID', 'user_login', 'display_name' ) ) ) as $user ) {
            $authors[] = array(
                'user_id'      => $user->ID,
                'user_login'   => $user->user_login,
                'display_name' => $user->display_name,
            );
        }

        return $authors;
    }

    /**
     * Gets the list of all tags.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getTags( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you must be able to edit posts on this site in order to view tags.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getKeywords', $args, $this );

        $tags = array();

        $all_tags = get_tags();
        if ( $all_tags ) {
            foreach ( (array) $all_tags as $tag ) {
                $struct             = array();
                $struct['tag_id']   = $tag->term_id;
                $struct['name']     = $tag->name;
                $struct['count']    = $tag->count;
                $struct['slug']     = $tag->slug;
                $struct['html_url'] = esc_html( get_tag_link( $tag->term_id ) );
                $struct['rss_url']  = esc_html( get_tag_feed_link( $tag->term_id ) );

                $tags[] = $struct;
            }
        }

        return $tags;
    }

    /**
     * Creates a new category.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Category.
     * }
     * @return int|IXR_Error Category ID.
     */
    public function wp_newCategory( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $category = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.newCategory', $args, $this );

        // Make sure the user is allowed to add a category.
        if ( ! current_user_can( 'manage_categories' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to add a category.' ) );
        }

        /*
         * If no slug was provided, make it empty
         * so that WordPress will generate one.
         */
        if ( empty( $category['slug'] ) ) {
            $category['slug'] = '';
        }

        /*
         * If no parent_id was provided, make it empty
         * so that it will be a top-level page (no parent).
         */
        if ( ! isset( $category['parent_id'] ) ) {
            $category['parent_id'] = '';
        }

        // If no description was provided, make it empty.
        if ( empty( $category['description'] ) ) {
            $category['description'] = '';
        }

        $new_category = array(
            'cat_name'             => $category['name'],
            'category_nicename'    => $category['slug'],
            'category_parent'      => $category['parent_id'],
            'category_description' => $category['description'],
        );

        $cat_id = wp_insert_category( $new_category, true );
        if ( is_wp_error( $cat_id ) ) {
            if ( 'term_exists' === $cat_id->get_error_code() ) {
                return (int) $cat_id->get_error_data();
            } else {
                return new IXR_Error( 500, __( 'Sorry, the category could not be created.' ) );
            }
        } elseif ( ! $cat_id ) {
            return new IXR_Error( 500, __( 'Sorry, the category could not be created.' ) );
        }

        /**
         * Fires after a new category has been successfully created via XML-RPC.
         *
         * @since 3.4.0
         *
         * @param int   $cat_id ID of the new category.
         * @param array $args   An array of new category arguments.
         */
        do_action( 'xmlrpc_call_success_wp_newCategory', $cat_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return $cat_id;
    }

    /**
     * Deletes a category.
     *
     * @since 2.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Category ID.
     * }
     * @return bool|IXR_Error See wp_delete_term() for return info.
     */
    public function wp_deleteCategory( $args ) {
        $this->escape( $args );

        $username    = $args[1];
        $password    = $args[2];
        $category_id = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.deleteCategory', $args, $this );

        if ( ! current_user_can( 'delete_term', $category_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to delete this category.' ) );
        }

        $status = wp_delete_term( $category_id, 'category' );

        if ( true == $status ) {
            /**
             * Fires after a category has been successfully deleted via XML-RPC.
             *
             * @since 3.4.0
             *
             * @param int   $category_id ID of the deleted category.
             * @param array $args        An array of arguments to delete the category.
             */
            do_action( 'xmlrpc_call_success_wp_deleteCategory', $category_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase
        }

        return $status;
    }

    /**
     * Retrieves category list.
     *
     * @since 2.2.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Category
     *     @type int    $4 Max number of results.
     * }
     * @return array|IXR_Error
     */
    public function wp_suggestCategories( $args ) {
        $this->escape( $args );

        $username    = $args[1];
        $password    = $args[2];
        $category    = $args[3];
        $max_results = (int) $args[4];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you must be able to edit posts on this site in order to view categories.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.suggestCategories', $args, $this );

        $category_suggestions = array();
        $args                 = array(
            'get'        => 'all',
            'number'     => $max_results,
            'name__like' => $category,
        );
        foreach ( (array) get_categories( $args ) as $cat ) {
            $category_suggestions[] = array(
                'category_id'   => $cat->term_id,
                'category_name' => $cat->name,
            );
        }

        return $category_suggestions;
    }

    /**
     * Retrieves a comment.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Comment ID.
     * }
     * @return array|IXR_Error
     */
    public function wp_getComment( $args ) {
        $this->escape( $args );

        $username   = $args[1];
        $password   = $args[2];
        $comment_id = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getComment', $args, $this );

        $comment = get_comment( $comment_id );
        if ( ! $comment ) {
            return new IXR_Error( 404, __( 'Invalid comment ID.' ) );
        }

        if ( ! current_user_can( 'edit_comment', $comment_id ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to moderate or edit this comment.' ) );
        }

        return $this->_prepare_comment( $comment );
    }

    /**
     * Retrieves comments.
     *
     * Besides the common blog_id (unused), username, and password arguments,
     * it takes a filter array as the last argument.
     *
     * Accepted 'filter' keys are 'status', 'post_id', 'offset', and 'number'.
     *
     * The defaults are as follows:
     * - 'status'  - Default is ''. Filter by status (e.g., 'approve', 'hold')
     * - 'post_id' - Default is ''. The post where the comment is posted.
     *               Empty string shows all comments.
     * - 'number'  - Default is 10. Total number of media items to retrieve.
     * - 'offset'  - Default is 0. See WP_Query::query() for more.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. Query arguments.
     * }
     * @return array|IXR_Error Array containing a collection of comments.
     *                         See wp_xmlrpc_server::wp_getComment() for a description
     *                         of each item contents.
     */
    public function wp_getComments( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $struct   = isset( $args[3] ) ? $args[3] : array();

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getComments', $args, $this );

        if ( isset( $struct['status'] ) ) {
            $status = $struct['status'];
        } else {
            $status = '';
        }

        if ( ! current_user_can( 'moderate_comments' ) && 'approve' !== $status ) {
            return new IXR_Error( 401, __( 'Invalid comment status.' ) );
        }

        $post_id = '';
        if ( isset( $struct['post_id'] ) ) {
            $post_id = absint( $struct['post_id'] );
        }

        $post_type = '';
        if ( isset( $struct['post_type'] ) ) {
            $post_type_object = get_post_type_object( $struct['post_type'] );
            if ( ! $post_type_object || ! post_type_supports( $post_type_object->name, 'comments' ) ) {
                return new IXR_Error( 404, __( 'Invalid post type.' ) );
            }
            $post_type = $struct['post_type'];
        }

        $offset = 0;
        if ( isset( $struct['offset'] ) ) {
            $offset = absint( $struct['offset'] );
        }

        $number = 10;
        if ( isset( $struct['number'] ) ) {
            $number = absint( $struct['number'] );
        }

        $comments = get_comments(
            array(
                'status'    => $status,
                'post_id'   => $post_id,
                'offset'    => $offset,
                'number'    => $number,
                'post_type' => $post_type,
            )
        );

        $comments_struct = array();
        if ( is_array( $comments ) ) {
            foreach ( $comments as $comment ) {
                $comments_struct[] = $this->_prepare_comment( $comment );
            }
        }

        return $comments_struct;
    }

    /**
     * Deletes a comment.
     *
     * By default, the comment will be moved to the Trash instead of deleted.
     * See wp_delete_comment() for more information on this behavior.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Comment ID.
     * }
     * @return bool|IXR_Error See wp_delete_comment().
     */
    public function wp_deleteComment( $args ) {
        $this->escape( $args );

        $username   = $args[1];
        $password   = $args[2];
        $comment_id = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! get_comment( $comment_id ) ) {
            return new IXR_Error( 404, __( 'Invalid comment ID.' ) );
        }

        if ( ! current_user_can( 'edit_comment', $comment_id ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to delete this comment.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.deleteComment', $args, $this );

        $status = wp_delete_comment( $comment_id );

        if ( $status ) {
            /**
             * Fires after a comment has been successfully deleted via XML-RPC.
             *
             * @since 3.4.0
             *
             * @param int   $comment_id ID of the deleted comment.
             * @param array $args       An array of arguments to delete the comment.
             */
            do_action( 'xmlrpc_call_success_wp_deleteComment', $comment_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase
        }

        return $status;
    }

    /**
     * Edits a comment.
     *
     * Besides the common blog_id (unused), username, and password arguments,
     * it takes a comment_id integer and a content_struct array as the last argument.
     *
     * The allowed keys in the content_struct array are:
     *  - 'author'
     *  - 'author_url'
     *  - 'author_email'
     *  - 'content'
     *  - 'date_created_gmt'
     *  - 'status'. Common statuses are 'approve', 'hold', 'spam'. See get_comment_statuses() for more details.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Comment ID.
     *     @type array  $4 Content structure.
     * }
     * @return true|IXR_Error True, on success.
     */
    public function wp_editComment( $args ) {
        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $comment_id     = (int) $args[3];
        $content_struct = $args[4];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! get_comment( $comment_id ) ) {
            return new IXR_Error( 404, __( 'Invalid comment ID.' ) );
        }

        if ( ! current_user_can( 'edit_comment', $comment_id ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to moderate or edit this comment.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.editComment', $args, $this );
        $comment = array(
            'comment_ID' => $comment_id,
        );

        if ( isset( $content_struct['status'] ) ) {
            $statuses = get_comment_statuses();
            $statuses = array_keys( $statuses );

            if ( ! in_array( $content_struct['status'], $statuses, true ) ) {
                return new IXR_Error( 401, __( 'Invalid comment status.' ) );
            }

            $comment['comment_approved'] = $content_struct['status'];
        }

        // Do some timestamp voodoo.
        if ( ! empty( $content_struct['date_created_gmt'] ) ) {
            // We know this is supposed to be GMT, so we're going to slap that Z on there by force.
            $dateCreated                 = rtrim( $content_struct['date_created_gmt']->getIso(), 'Z' ) . 'Z';
            $comment['comment_date']     = get_date_from_gmt( $dateCreated );
            $comment['comment_date_gmt'] = iso8601_to_datetime( $dateCreated, 'gmt' );
        }

        if ( isset( $content_struct['content'] ) ) {
            $comment['comment_content'] = $content_struct['content'];
        }

        if ( isset( $content_struct['author'] ) ) {
            $comment['comment_author'] = $content_struct['author'];
        }

        if ( isset( $content_struct['author_url'] ) ) {
            $comment['comment_author_url'] = $content_struct['author_url'];
        }

        if ( isset( $content_struct['author_email'] ) ) {
            $comment['comment_author_email'] = $content_struct['author_email'];
        }

        $result = wp_update_comment( $comment, true );
        if ( is_wp_error( $result ) ) {
            return new IXR_Error( 500, $result->get_error_message() );
        }

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, the comment could not be updated.' ) );
        }

        /**
         * Fires after a comment has been successfully updated via XML-RPC.
         *
         * @since 3.4.0
         *
         * @param int   $comment_id ID of the updated comment.
         * @param array $args       An array of arguments to update the comment.
         */
        do_action( 'xmlrpc_call_success_wp_editComment', $comment_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return true;
    }

    /**
     * Creates a new comment.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int        $0 Blog ID (unused).
     *     @type string     $1 Username.
     *     @type string     $2 Password.
     *     @type string|int $3 Post ID or URL.
     *     @type array      $4 Content structure.
     * }
     * @return int|IXR_Error See wp_new_comment().
     */
    public function wp_newComment( $args ) {
        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $post           = $args[3];
        $content_struct = $args[4];

        /**
         * Filters whether to allow anonymous comments over XML-RPC.
         *
         * @since 2.7.0
         *
         * @param bool $allow Whether to allow anonymous commenting via XML-RPC.
         *                    Default false.
         */
        $allow_anon = apply_filters( 'xmlrpc_allow_anonymous_comments', false );

        $user = $this->login( $username, $password );

        if ( ! $user ) {
            $logged_in = false;
            if ( $allow_anon && get_option( 'comment_registration' ) ) {
                return new IXR_Error( 403, __( 'Sorry, you must be logged in to comment.' ) );
            } elseif ( ! $allow_anon ) {
                return $this->error;
            }
        } else {
            $logged_in = true;
        }

        if ( is_numeric( $post ) ) {
            $post_id = absint( $post );
        } else {
            $post_id = url_to_postid( $post );
        }

        if ( ! $post_id ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! get_post( $post_id ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! comments_open( $post_id ) ) {
            return new IXR_Error( 403, __( 'Sorry, comments are closed for this item.' ) );
        }

        if (
            'publish' === get_post_status( $post_id ) &&
            ! current_user_can( 'edit_post', $post_id ) &&
            post_password_required( $post_id )
        ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to comment on this post.' ) );
        }

        if (
            'private' === get_post_status( $post_id ) &&
            ! current_user_can( 'read_post', $post_id )
        ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to comment on this post.' ) );
        }

        $comment = array(
            'comment_post_ID' => $post_id,
            'comment_content' => trim( $content_struct['content'] ),
        );

        if ( $logged_in ) {
            $display_name = $user->display_name;
            $user_email   = $user->user_email;
            $user_url     = $user->user_url;

            $comment['comment_author']       = $this->escape( $display_name );
            $comment['comment_author_email'] = $this->escape( $user_email );
            $comment['comment_author_url']   = $this->escape( $user_url );
            $comment['user_id']              = $user->ID;
        } else {
            $comment['comment_author'] = '';
            if ( isset( $content_struct['author'] ) ) {
                $comment['comment_author'] = $content_struct['author'];
            }

            $comment['comment_author_email'] = '';
            if ( isset( $content_struct['author_email'] ) ) {
                $comment['comment_author_email'] = $content_struct['author_email'];
            }

            $comment['comment_author_url'] = '';
            if ( isset( $content_struct['author_url'] ) ) {
                $comment['comment_author_url'] = $content_struct['author_url'];
            }

            $comment['user_id'] = 0;

            if ( get_option( 'require_name_email' ) ) {
                if ( strlen( $comment['comment_author_email'] ) < 6 || '' === $comment['comment_author'] ) {
                    return new IXR_Error( 403, __( 'Comment author name and email are required.' ) );
                } elseif ( ! is_email( $comment['comment_author_email'] ) ) {
                    return new IXR_Error( 403, __( 'A valid email address is required.' ) );
                }
            }
        }

        $comment['comment_parent'] = isset( $content_struct['comment_parent'] ) ? absint( $content_struct['comment_parent'] ) : 0;

        /** This filter is documented in wp-includes/comment.php */
        $allow_empty = apply_filters( 'allow_empty_comment', false, $comment );

        if ( ! $allow_empty && '' === $comment['comment_content'] ) {
            return new IXR_Error( 403, __( 'Comment is required.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.newComment', $args, $this );

        $comment_id = wp_new_comment( $comment, true );
        if ( is_wp_error( $comment_id ) ) {
            return new IXR_Error( 403, $comment_id->get_error_message() );
        }

        if ( ! $comment_id ) {
            return new IXR_Error( 403, __( 'Something went wrong.' ) );
        }

        /**
         * Fires after a new comment has been successfully created via XML-RPC.
         *
         * @since 3.4.0
         *
         * @param int   $comment_id ID of the new comment.
         * @param array $args       An array of new comment arguments.
         */
        do_action( 'xmlrpc_call_success_wp_newComment', $comment_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return $comment_id;
    }

    /**
     * Retrieves all of the comment status.
     *
     * @since 2.7.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getCommentStatusList( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'publish_posts' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to access details about this site.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getCommentStatusList', $args, $this );

        return get_comment_statuses();
    }

    /**
     * Retrieves comment counts.
     *
     * @since 2.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Post ID.
     * }
     * @return array|IXR_Error
     */
    public function wp_getCommentCount( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $post_id  = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        $post = get_post( $post_id, ARRAY_A );
        if ( empty( $post['ID'] ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to access details of this post.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getCommentCount', $args, $this );

        $count = wp_count_comments( $post_id );

        return array(
            'approved'            => $count->approved,
            'awaiting_moderation' => $count->moderated,
            'spam'                => $count->spam,
            'total_comments'      => $count->total_comments,
        );
    }

    /**
     * Retrieves post statuses.
     *
     * @since 2.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPostStatusList( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to access details about this site.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPostStatusList', $args, $this );

        return get_post_statuses();
    }

    /**
     * Retrieves page statuses.
     *
     * @since 2.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPageStatusList( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_pages' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to access details about this site.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPageStatusList', $args, $this );

        return get_page_statuses();
    }

    /**
     * Retrieves page templates.
     *
     * @since 2.6.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPageTemplates( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_pages' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to access details about this site.' ) );
        }

        $templates            = get_page_templates();
        $templates['Default'] = 'default';

        return $templates;
    }

    /**
     * Retrieves blog options.
     *
     * @since 2.6.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. Options.
     * }
     * @return array|IXR_Error
     */
    public function wp_getOptions( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $options  = isset( $args[3] ) ? (array) $args[3] : array();

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        // If no specific options where asked for, return all of them.
        if ( count( $options ) === 0 ) {
            $options = array_keys( $this->blog_options );
        }

        return $this->_getOptions( $options );
    }

    /**
     * Retrieves blog options value from list.
     *
     * @since 2.6.0
     *
     * @param array $options Options to retrieve.
     * @return array
     */
    public function _getOptions( $options ) {
        $data       = array();
        $can_manage = current_user_can( 'manage_options' );
        foreach ( $options as $option ) {
            if ( array_key_exists( $option, $this->blog_options ) ) {
                $data[ $option ] = $this->blog_options[ $option ];
                // Is the value static or dynamic?
                if ( isset( $data[ $option ]['option'] ) ) {
                    $data[ $option ]['value'] = get_option( $data[ $option ]['option'] );
                    unset( $data[ $option ]['option'] );
                }

                if ( ! $can_manage ) {
                    $data[ $option ]['readonly'] = true;
                }
            }
        }

        return $data;
    }

    /**
     * Updates blog options.
     *
     * @since 2.6.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Options.
     * }
     * @return array|IXR_Error
     */
    public function wp_setOptions( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $options  = (array) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'manage_options' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to update options.' ) );
        }

        $option_names = array();
        foreach ( $options as $o_name => $o_value ) {
            $option_names[] = $o_name;
            if ( ! array_key_exists( $o_name, $this->blog_options ) ) {
                continue;
            }

            if ( true == $this->blog_options[ $o_name ]['readonly'] ) {
                continue;
            }

            update_option( $this->blog_options[ $o_name ]['option'], wp_unslash( $o_value ) );
        }

        // Now return the updated values.
        return $this->_getOptions( $option_names );
    }

    /**
     * Retrieves a media item by ID.
     *
     * @since 3.1.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Attachment ID.
     * }
     * @return array|IXR_Error Associative array contains:
     *  - 'date_created_gmt'
     *  - 'parent'
     *  - 'link'
     *  - 'thumbnail'
     *  - 'title'
     *  - 'caption'
     *  - 'description'
     *  - 'metadata'
     */
    public function wp_getMediaItem( $args ) {
        $this->escape( $args );

        $username      = $args[1];
        $password      = $args[2];
        $attachment_id = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'upload_files' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to upload files.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getMediaItem', $args, $this );

        $attachment = get_post( $attachment_id );
        if ( ! $attachment || 'attachment' !== $attachment->post_type ) {
            return new IXR_Error( 404, __( 'Invalid attachment ID.' ) );
        }

        return $this->_prepare_media_item( $attachment );
    }

    /**
     * Retrieves a collection of media library items (or attachments).
     *
     * Besides the common blog_id (unused), username, and password arguments,
     * it takes a filter array as the last argument.
     *
     * Accepted 'filter' keys are 'parent_id', 'mime_type', 'offset', and 'number'.
     *
     * The defaults are as follows:
     * - 'number'    - Default is 5. Total number of media items to retrieve.
     * - 'offset'    - Default is 0. See WP_Query::query() for more.
     * - 'parent_id' - Default is ''. The post where the media item is attached.
     *                 Empty string shows all media items. 0 shows unattached media items.
     * - 'mime_type' - Default is ''. Filter by mime type (e.g., 'image/jpeg', 'application/pdf')
     *
     * @since 3.1.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. Query arguments.
     * }
     * @return array|IXR_Error Array containing a collection of media items.
     *                         See wp_xmlrpc_server::wp_getMediaItem() for a description
     *                         of each item contents.
     */
    public function wp_getMediaLibrary( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $struct   = isset( $args[3] ) ? $args[3] : array();

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'upload_files' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to upload files.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getMediaLibrary', $args, $this );

        $parent_id = ( isset( $struct['parent_id'] ) ) ? absint( $struct['parent_id'] ) : '';
        $mime_type = ( isset( $struct['mime_type'] ) ) ? $struct['mime_type'] : '';
        $offset    = ( isset( $struct['offset'] ) ) ? absint( $struct['offset'] ) : 0;
        $number    = ( isset( $struct['number'] ) ) ? absint( $struct['number'] ) : -1;

        $attachments = get_posts(
            array(
                'post_type'      => 'attachment',
                'post_parent'    => $parent_id,
                'offset'         => $offset,
                'numberposts'    => $number,
                'post_mime_type' => $mime_type,
            )
        );

        $attachments_struct = array();

        foreach ( $attachments as $attachment ) {
            $attachments_struct[] = $this->_prepare_media_item( $attachment );
        }

        return $attachments_struct;
    }

    /**
     * Retrieves a list of post formats used by the site.
     *
     * @since 3.1.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error List of post formats, otherwise IXR_Error object.
     */
    public function wp_getPostFormats( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 403, __( 'Sorry, you are not allowed to access details about this site.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPostFormats', $args, $this );

        $formats = get_post_format_strings();

        // Find out if they want a list of currently supports formats.
        if ( isset( $args[3] ) && is_array( $args[3] ) ) {
            if ( $args[3]['show-supported'] ) {
                if ( current_theme_supports( 'post-formats' ) ) {
                    $supported = get_theme_support( 'post-formats' );

                    $data              = array();
                    $data['all']       = $formats;
                    $data['supported'] = $supported[0];

                    $formats = $data;
                }
            }
        }

        return $formats;
    }

    /**
     * Retrieves a post type.
     *
     * @since 3.4.0
     *
     * @see get_post_type_object()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type string $3 Post type name.
     *     @type array  $4 Optional. Fields to fetch.
     * }
     * @return array|IXR_Error Array contains:
     *  - 'labels'
     *  - 'description'
     *  - 'capability_type'
     *  - 'cap'
     *  - 'map_meta_cap'
     *  - 'hierarchical'
     *  - 'menu_position'
     *  - 'taxonomies'
     *  - 'supports'
     */
    public function wp_getPostType( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $post_type_name = $args[3];

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /**
             * Filters the default post type query fields used by the given XML-RPC method.
             *
             * @since 3.4.0
             *
             * @param array  $fields An array of post type fields to retrieve. By default,
             *                       contains 'labels', 'cap', and 'taxonomies'.
             * @param string $method The method name.
             */
            $fields = apply_filters( 'xmlrpc_default_posttype_fields', array( 'labels', 'cap', 'taxonomies' ), 'wp.getPostType' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPostType', $args, $this );

        if ( ! post_type_exists( $post_type_name ) ) {
            return new IXR_Error( 403, __( 'Invalid post type.' ) );
        }

        $post_type = get_post_type_object( $post_type_name );

        if ( ! current_user_can( $post_type->cap->edit_posts ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit posts in this post type.' ) );
        }

        return $this->_prepare_post_type( $post_type, $fields );
    }

    /**
     * Retrieves post types.
     *
     * @since 3.4.0
     *
     * @see get_post_types()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Optional. Query arguments.
     *     @type array  $4 Optional. Fields to fetch.
     * }
     * @return array|IXR_Error
     */
    public function wp_getPostTypes( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $filter   = isset( $args[3] ) ? $args[3] : array( 'public' => true );

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
            $fields = apply_filters( 'xmlrpc_default_posttype_fields', array( 'labels', 'cap', 'taxonomies' ), 'wp.getPostTypes' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getPostTypes', $args, $this );

        $post_types = get_post_types( $filter, 'objects' );

        $struct = array();

        foreach ( $post_types as $post_type ) {
            if ( ! current_user_can( $post_type->cap->edit_posts ) ) {
                continue;
            }

            $struct[ $post_type->name ] = $this->_prepare_post_type( $post_type, $fields );
        }

        return $struct;
    }

    /**
     * Retrieves revisions for a specific post.
     *
     * @since 3.5.0
     *
     * The optional $fields parameter specifies what fields will be included
     * in the response array.
     *
     * @uses wp_get_post_revisions()
     * @see wp_getPost() for more on $fields
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Post ID.
     *     @type array  $4 Optional. Fields to fetch.
     * }
     * @return array|IXR_Error Array containing a collection of posts.
     */
    public function wp_getRevisions( $args ) {
        if ( ! $this->minimum_args( $args, 4 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        $post_id  = (int) $args[3];

        if ( isset( $args[4] ) ) {
            $fields = $args[4];
        } else {
            /**
             * Filters the default revision query fields used by the given XML-RPC method.
             *
             * @since 3.5.0
             *
             * @param array  $field  An array of revision fields to retrieve. By default,
             *                       contains 'post_date' and 'post_date_gmt'.
             * @param string $method The method name.
             */
            $fields = apply_filters( 'xmlrpc_default_revision_fields', array( 'post_date', 'post_date_gmt' ), 'wp.getRevisions' );
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.getRevisions', $args, $this );

        $post = get_post( $post_id );
        if ( ! $post ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit posts.' ) );
        }

        // Check if revisions are enabled.
        if ( ! wp_revisions_enabled( $post ) ) {
            return new IXR_Error( 401, __( 'Sorry, revisions are disabled.' ) );
        }

        $revisions = wp_get_post_revisions( $post_id );

        if ( ! $revisions ) {
            return array();
        }

        $struct = array();

        foreach ( $revisions as $revision ) {
            if ( ! current_user_can( 'read_post', $revision->ID ) ) {
                continue;
            }

            // Skip autosaves.
            if ( wp_is_post_autosave( $revision ) ) {
                continue;
            }

            $struct[] = $this->_prepare_post( get_object_vars( $revision ), $fields );
        }

        return $struct;
    }

    /**
     * Restores a post revision.
     *
     * @since 3.5.0
     *
     * @uses wp_restore_post_revision()
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Revision ID.
     * }
     * @return bool|IXR_Error false if there was an error restoring, true if success.
     */
    public function wp_restoreRevision( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        $this->escape( $args );

        $username    = $args[1];
        $password    = $args[2];
        $revision_id = (int) $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'wp.restoreRevision', $args, $this );

        $revision = wp_get_post_revision( $revision_id );
        if ( ! $revision ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( wp_is_post_autosave( $revision ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        $post = get_post( $revision->post_parent );
        if ( ! $post ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $revision->post_parent ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        // Check if revisions are disabled.
        if ( ! wp_revisions_enabled( $post ) ) {
            return new IXR_Error( 401, __( 'Sorry, revisions are disabled.' ) );
        }

        $post = wp_restore_post_revision( $revision_id );

        return (bool) $post;
    }

    /*
     * Blogger API functions.
     * Specs on http://plant.blogger.com/api and https://groups.yahoo.com/group/bloggerDev/
     */

    /**
     * Retrieves blogs that user owns.
     *
     * Will make more sense once we support multiple blogs.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function blogger_getUsersBlogs( $args ) {
        if ( ! $this->minimum_args( $args, 3 ) ) {
            return $this->error;
        }

        if ( is_multisite() ) {
            return $this->_multisite_getUsersBlogs( $args );
        }

        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.getUsersBlogs', $args, $this );

        $is_admin = current_user_can( 'manage_options' );

        $struct = array(
            'isAdmin'  => $is_admin,
            'url'      => get_option( 'home' ) . '/',
            'blogid'   => '1',
            'blogName' => get_option( 'blogname' ),
            'xmlrpc'   => site_url( 'xmlrpc.php', 'rpc' ),
        );

        return array( $struct );
    }

    /**
     * Private function for retrieving a users blogs for multisite setups.
     *
     * @since 3.0.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    protected function _multisite_getUsersBlogs( $args ) {
        $current_blog = get_site();

        $domain = $current_blog->domain;
        $path   = $current_blog->path . 'xmlrpc.php';

        $blogs = $this->wp_getUsersBlogs( $args );
        if ( $blogs instanceof IXR_Error ) {
            return $blogs;
        }

        if ( $_SERVER['HTTP_HOST'] == $domain && $_SERVER['REQUEST_URI'] == $path ) {
            return $blogs;
        } else {
            foreach ( (array) $blogs as $blog ) {
                if ( str_contains( $blog['url'], $_SERVER['HTTP_HOST'] ) ) {
                    return array( $blog );
                }
            }
            return array();
        }
    }

    /**
     * Retrieves user's data.
     *
     * Gives your client some info about you, so you don't have to.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function blogger_getUserInfo( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to access user data on this site.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.getUserInfo', $args, $this );

        $struct = array(
            'nickname'  => $user->nickname,
            'userid'    => $user->ID,
            'url'       => $user->user_url,
            'lastname'  => $user->last_name,
            'firstname' => $user->first_name,
        );

        return $struct;
    }

    /**
     * Retrieves a post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type int    $1 Post ID.
     *     @type string $2 Username.
     *     @type string $3 Password.
     * }
     * @return array|IXR_Error
     */
    public function blogger_getPost( $args ) {
        $this->escape( $args );

        $post_id  = (int) $args[1];
        $username = $args[2];
        $password = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        $post_data = get_post( $post_id, ARRAY_A );
        if ( ! $post_data ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.getPost', $args, $this );

        $categories = implode( ',', wp_get_post_categories( $post_id ) );

        $content  = '<title>' . wp_unslash( $post_data['post_title'] ) . '</title>';
        $content .= '<category>' . $categories . '</category>';
        $content .= wp_unslash( $post_data['post_content'] );

        $struct = array(
            'userid'      => $post_data['post_author'],
            'dateCreated' => $this->_convert_date( $post_data['post_date'] ),
            'content'     => $content,
            'postid'      => (string) $post_data['ID'],
        );

        return $struct;
    }

    /**
     * Retrieves the list of recent posts.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type string $0 App key (unused).
     *     @type int    $1 Blog ID (unused).
     *     @type string $2 Username.
     *     @type string $3 Password.
     *     @type int    $4 Optional. Number of posts.
     * }
     * @return array|IXR_Error
     */
    public function blogger_getRecentPosts( $args ) {

        $this->escape( $args );

        // $args[0] = appkey - ignored.
        $username = $args[2];
        $password = $args[3];
        if ( isset( $args[4] ) ) {
            $query = array( 'numberposts' => absint( $args[4] ) );
        } else {
            $query = array();
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit posts.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.getRecentPosts', $args, $this );

        $posts_list = wp_get_recent_posts( $query );

        if ( ! $posts_list ) {
            $this->error = new IXR_Error( 500, __( 'Either there are no posts, or something went wrong.' ) );
            return $this->error;
        }

        $recent_posts = array();
        foreach ( $posts_list as $entry ) {
            if ( ! current_user_can( 'edit_post', $entry['ID'] ) ) {
                continue;
            }

            $post_date  = $this->_convert_date( $entry['post_date'] );
            $categories = implode( ',', wp_get_post_categories( $entry['ID'] ) );

            $content  = '<title>' . wp_unslash( $entry['post_title'] ) . '</title>';
            $content .= '<category>' . $categories . '</category>';
            $content .= wp_unslash( $entry['post_content'] );

            $recent_posts[] = array(
                'userid'      => $entry['post_author'],
                'dateCreated' => $post_date,
                'content'     => $content,
                'postid'      => (string) $entry['ID'],
            );
        }

        return $recent_posts;
    }

    /**
     * Deprecated.
     *
     * @since 1.5.0
     * @deprecated 3.5.0
     *
     * @param array $args Unused.
     * @return IXR_Error Error object.
     */
    public function blogger_getTemplate( $args ) {
        return new IXR_Error( 403, __( 'Sorry, this method is not supported.' ) );
    }

    /**
     * Deprecated.
     *
     * @since 1.5.0
     * @deprecated 3.5.0
     *
     * @param array $args Unused.
     * @return IXR_Error Error object.
     */
    public function blogger_setTemplate( $args ) {
        return new IXR_Error( 403, __( 'Sorry, this method is not supported.' ) );
    }

    /**
     * Creates a new post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type string $0 App key (unused).
     *     @type int    $1 Blog ID (unused).
     *     @type string $2 Username.
     *     @type string $3 Password.
     *     @type string $4 Content.
     *     @type int    $5 Publish flag. 0 for draft, 1 for publish.
     * }
     * @return int|IXR_Error
     */
    public function blogger_newPost( $args ) {
        $this->escape( $args );

        $username = $args[2];
        $password = $args[3];
        $content  = $args[4];
        $publish  = $args[5];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.newPost', $args, $this );

        $cap = ( $publish ) ? 'publish_posts' : 'edit_posts';
        if ( ! current_user_can( get_post_type_object( 'post' )->cap->create_posts ) || ! current_user_can( $cap ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to post on this site.' ) );
        }

        $post_status = ( $publish ) ? 'publish' : 'draft';

        $post_author = $user->ID;

        $post_title    = xmlrpc_getposttitle( $content );
        $post_category = xmlrpc_getpostcategory( $content );
        $post_content  = xmlrpc_removepostdata( $content );

        $post_date     = current_time( 'mysql' );
        $post_date_gmt = current_time( 'mysql', 1 );

        $post_data = compact( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_category', 'post_status' );

        $post_id = wp_insert_post( $post_data );
        if ( is_wp_error( $post_id ) ) {
            return new IXR_Error( 500, $post_id->get_error_message() );
        }

        if ( ! $post_id ) {
            return new IXR_Error( 500, __( 'Sorry, the post could not be created.' ) );
        }

        $this->attach_uploads( $post_id, $post_content );

        /**
         * Fires after a new post has been successfully created via the XML-RPC Blogger API.
         *
         * @since 3.4.0
         *
         * @param int   $post_id ID of the new post.
         * @param array $args    An array of new post arguments.
         */
        do_action( 'xmlrpc_call_success_blogger_newPost', $post_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return $post_id;
    }

    /**
     * Edits a post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type int    $1 Post ID.
     *     @type string $2 Username.
     *     @type string $3 Password.
     *     @type string $4 Content
     *     @type int    $5 Publish flag. 0 for draft, 1 for publish.
     * }
     * @return true|IXR_Error true when done.
     */
    public function blogger_editPost( $args ) {

        $this->escape( $args );

        $post_id  = (int) $args[1];
        $username = $args[2];
        $password = $args[3];
        $content  = $args[4];
        $publish  = $args[5];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.editPost', $args, $this );

        $actual_post = get_post( $post_id, ARRAY_A );

        if ( ! $actual_post || 'post' !== $actual_post['post_type'] ) {
            return new IXR_Error( 404, __( 'Sorry, no such post.' ) );
        }

        $this->escape( $actual_post );

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }
        if ( 'publish' === $actual_post['post_status'] && ! current_user_can( 'publish_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish this post.' ) );
        }

        $postdata                  = array();
        $postdata['ID']            = $actual_post['ID'];
        $postdata['post_content']  = xmlrpc_removepostdata( $content );
        $postdata['post_title']    = xmlrpc_getposttitle( $content );
        $postdata['post_category'] = xmlrpc_getpostcategory( $content );
        $postdata['post_status']   = $actual_post['post_status'];
        $postdata['post_excerpt']  = $actual_post['post_excerpt'];
        $postdata['post_status']   = $publish ? 'publish' : 'draft';

        $result = wp_update_post( $postdata );

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, the post could not be updated.' ) );
        }
        $this->attach_uploads( $actual_post['ID'], $postdata['post_content'] );

        /**
         * Fires after a post has been successfully updated via the XML-RPC Blogger API.
         *
         * @since 3.4.0
         *
         * @param int   $post_id ID of the updated post.
         * @param array $args    An array of arguments for the post to edit.
         */
        do_action( 'xmlrpc_call_success_blogger_editPost', $post_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return true;
    }

    /**
     * Deletes a post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type int    $1 Post ID.
     *     @type string $2 Username.
     *     @type string $3 Password.
     * }
     * @return true|IXR_Error True when post is deleted.
     */
    public function blogger_deletePost( $args ) {
        $this->escape( $args );

        $post_id  = (int) $args[1];
        $username = $args[2];
        $password = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'blogger.deletePost', $args, $this );

        $actual_post = get_post( $post_id, ARRAY_A );

        if ( ! $actual_post || 'post' !== $actual_post['post_type'] ) {
            return new IXR_Error( 404, __( 'Sorry, no such post.' ) );
        }

        if ( ! current_user_can( 'delete_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to delete this post.' ) );
        }

        $result = wp_delete_post( $post_id );

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, the post could not be deleted.' ) );
        }

        /**
         * Fires after a post has been successfully deleted via the XML-RPC Blogger API.
         *
         * @since 3.4.0
         *
         * @param int   $post_id ID of the deleted post.
         * @param array $args    An array of arguments to delete the post.
         */
        do_action( 'xmlrpc_call_success_blogger_deletePost', $post_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return true;
    }

    /*
     * MetaWeblog API functions.
     * Specs on wherever Dave Winer wants them to be.
     */

    /**
     * Creates a new post.
     *
     * The 'content_struct' argument must contain:
     *  - title
     *  - description
     *  - mt_excerpt
     *  - mt_text_more
     *  - mt_keywords
     *  - mt_tb_ping_urls
     *  - categories
     *
     * Also, it can optionally contain:
     *  - wp_slug
     *  - wp_password
     *  - wp_page_parent_id
     *  - wp_page_order
     *  - wp_author_id
     *  - post_status | page_status - can be 'draft', 'private', 'publish', or 'pending'
     *  - mt_allow_comments - can be 'open' or 'closed'
     *  - mt_allow_pings - can be 'open' or 'closed'
     *  - date_created_gmt
     *  - dateCreated
     *  - wp_post_thumbnail
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Content structure.
     *     @type int    $4 Optional. Publish flag. 0 for draft, 1 for publish. Default 0.
     * }
     * @return int|IXR_Error
     */
    public function mw_newPost( $args ) {
        $this->escape( $args );

        $username       = $args[1];
        $password       = $args[2];
        $content_struct = $args[3];
        $publish        = isset( $args[4] ) ? $args[4] : 0;

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'metaWeblog.newPost', $args, $this );

        $page_template = '';
        if ( ! empty( $content_struct['post_type'] ) ) {
            if ( 'page' === $content_struct['post_type'] ) {
                if ( $publish ) {
                    $cap = 'publish_pages';
                } elseif ( isset( $content_struct['page_status'] ) && 'publish' === $content_struct['page_status'] ) {
                    $cap = 'publish_pages';
                } else {
                    $cap = 'edit_pages';
                }
                $error_message = __( 'Sorry, you are not allowed to publish pages on this site.' );
                $post_type     = 'page';
                if ( ! empty( $content_struct['wp_page_template'] ) ) {
                    $page_template = $content_struct['wp_page_template'];
                }
            } elseif ( 'post' === $content_struct['post_type'] ) {
                if ( $publish ) {
                    $cap = 'publish_posts';
                } elseif ( isset( $content_struct['post_status'] ) && 'publish' === $content_struct['post_status'] ) {
                    $cap = 'publish_posts';
                } else {
                    $cap = 'edit_posts';
                }
                $error_message = __( 'Sorry, you are not allowed to publish posts on this site.' );
                $post_type     = 'post';
            } else {
                // No other 'post_type' values are allowed here.
                return new IXR_Error( 401, __( 'Invalid post type.' ) );
            }
        } else {
            if ( $publish ) {
                $cap = 'publish_posts';
            } elseif ( isset( $content_struct['post_status'] ) && 'publish' === $content_struct['post_status'] ) {
                $cap = 'publish_posts';
            } else {
                $cap = 'edit_posts';
            }
            $error_message = __( 'Sorry, you are not allowed to publish posts on this site.' );
            $post_type     = 'post';
        }

        if ( ! current_user_can( get_post_type_object( $post_type )->cap->create_posts ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish posts on this site.' ) );
        }
        if ( ! current_user_can( $cap ) ) {
            return new IXR_Error( 401, $error_message );
        }

        // Check for a valid post format if one was given.
        if ( isset( $content_struct['wp_post_format'] ) ) {
            $content_struct['wp_post_format'] = sanitize_key( $content_struct['wp_post_format'] );
            if ( ! array_key_exists( $content_struct['wp_post_format'], get_post_format_strings() ) ) {
                return new IXR_Error( 404, __( 'Invalid post format.' ) );
            }
        }

        // Let WordPress generate the 'post_name' (slug) unless
        // one has been provided.
        $post_name = null;
        if ( isset( $content_struct['wp_slug'] ) ) {
            $post_name = $content_struct['wp_slug'];
        }

        // Only use a password if one was given.
        $post_password = '';
        if ( isset( $content_struct['wp_password'] ) ) {
            $post_password = $content_struct['wp_password'];
        }

        // Only set a post parent if one was given.
        $post_parent = 0;
        if ( isset( $content_struct['wp_page_parent_id'] ) ) {
            $post_parent = $content_struct['wp_page_parent_id'];
        }

        // Only set the 'menu_order' if it was given.
        $menu_order = 0;
        if ( isset( $content_struct['wp_page_order'] ) ) {
            $menu_order = $content_struct['wp_page_order'];
        }

        $post_author = $user->ID;

        // If an author id was provided then use it instead.
        if ( isset( $content_struct['wp_author_id'] ) && ( $user->ID != $content_struct['wp_author_id'] ) ) {
            switch ( $post_type ) {
                case 'post':
                    if ( ! current_user_can( 'edit_others_posts' ) ) {
                        return new IXR_Error( 401, __( 'Sorry, you are not allowed to create posts as this user.' ) );
                    }
                    break;
                case 'page':
                    if ( ! current_user_can( 'edit_others_pages' ) ) {
                        return new IXR_Error( 401, __( 'Sorry, you are not allowed to create pages as this user.' ) );
                    }
                    break;
                default:
                    return new IXR_Error( 401, __( 'Invalid post type.' ) );
            }
            $author = get_userdata( $content_struct['wp_author_id'] );
            if ( ! $author ) {
                return new IXR_Error( 404, __( 'Invalid author ID.' ) );
            }
            $post_author = $content_struct['wp_author_id'];
        }

        $post_title   = isset( $content_struct['title'] ) ? $content_struct['title'] : '';
        $post_content = isset( $content_struct['description'] ) ? $content_struct['description'] : '';

        $post_status = $publish ? 'publish' : 'draft';

        if ( isset( $content_struct[ "{$post_type}_status" ] ) ) {
            switch ( $content_struct[ "{$post_type}_status" ] ) {
                case 'draft':
                case 'pending':
                case 'private':
                case 'publish':
                    $post_status = $content_struct[ "{$post_type}_status" ];
                    break;
                default:
                    // Deliberably left empty.
                    break;
            }
        }

        $post_excerpt = isset( $content_struct['mt_excerpt'] ) ? $content_struct['mt_excerpt'] : '';
        $post_more    = isset( $content_struct['mt_text_more'] ) ? $content_struct['mt_text_more'] : '';

        $tags_input = isset( $content_struct['mt_keywords'] ) ? $content_struct['mt_keywords'] : array();

        if ( isset( $content_struct['mt_allow_comments'] ) ) {
            if ( ! is_numeric( $content_struct['mt_allow_comments'] ) ) {
                switch ( $content_struct['mt_allow_comments'] ) {
                    case 'closed':
                        $comment_status = 'closed';
                        break;
                    case 'open':
                        $comment_status = 'open';
                        break;
                    default:
                        $comment_status = get_default_comment_status( $post_type );
                        break;
                }
            } else {
                switch ( (int) $content_struct['mt_allow_comments'] ) {
                    case 0:
                    case 2:
                        $comment_status = 'closed';
                        break;
                    case 1:
                        $comment_status = 'open';
                        break;
                    default:
                        $comment_status = get_default_comment_status( $post_type );
                        break;
                }
            }
        } else {
            $comment_status = get_default_comment_status( $post_type );
        }

        if ( isset( $content_struct['mt_allow_pings'] ) ) {
            if ( ! is_numeric( $content_struct['mt_allow_pings'] ) ) {
                switch ( $content_struct['mt_allow_pings'] ) {
                    case 'closed':
                        $ping_status = 'closed';
                        break;
                    case 'open':
                        $ping_status = 'open';
                        break;
                    default:
                        $ping_status = get_default_comment_status( $post_type, 'pingback' );
                        break;
                }
            } else {
                switch ( (int) $content_struct['mt_allow_pings'] ) {
                    case 0:
                        $ping_status = 'closed';
                        break;
                    case 1:
                        $ping_status = 'open';
                        break;
                    default:
                        $ping_status = get_default_comment_status( $post_type, 'pingback' );
                        break;
                }
            }
        } else {
            $ping_status = get_default_comment_status( $post_type, 'pingback' );
        }

        if ( $post_more ) {
            $post_content .= '<!--more-->' . $post_more;
        }

        $to_ping = '';
        if ( isset( $content_struct['mt_tb_ping_urls'] ) ) {
            $to_ping = $content_struct['mt_tb_ping_urls'];
            if ( is_array( $to_ping ) ) {
                $to_ping = implode( ' ', $to_ping );
            }
        }

        // Do some timestamp voodoo.
        if ( ! empty( $content_struct['date_created_gmt'] ) ) {
            // We know this is supposed to be GMT, so we're going to slap that Z on there by force.
            $dateCreated = rtrim( $content_struct['date_created_gmt']->getIso(), 'Z' ) . 'Z';
        } elseif ( ! empty( $content_struct['dateCreated'] ) ) {
            $dateCreated = $content_struct['dateCreated']->getIso();
        }

        $post_date     = '';
        $post_date_gmt = '';
        if ( ! empty( $dateCreated ) ) {
            $post_date     = iso8601_to_datetime( $dateCreated );
            $post_date_gmt = iso8601_to_datetime( $dateCreated, 'gmt' );
        }

        $post_category = array();
        if ( isset( $content_struct['categories'] ) ) {
            $catnames = $content_struct['categories'];

            if ( is_array( $catnames ) ) {
                foreach ( $catnames as $cat ) {
                    $post_category[] = get_cat_ID( $cat );
                }
            }
        }

        $postdata = compact( 'post_author', 'post_date', 'post_date_gmt', 'post_content', 'post_title', 'post_category', 'post_status', 'post_excerpt', 'comment_status', 'ping_status', 'to_ping', 'post_type', 'post_name', 'post_password', 'post_parent', 'menu_order', 'tags_input', 'page_template' );

        $post_id        = get_default_post_to_edit( $post_type, true )->ID;
        $postdata['ID'] = $post_id;

        // Only posts can be sticky.
        if ( 'post' === $post_type && isset( $content_struct['sticky'] ) ) {
            $data           = $postdata;
            $data['sticky'] = $content_struct['sticky'];
            $error          = $this->_toggle_sticky( $data );
            if ( $error ) {
                return $error;
            }
        }

        if ( isset( $content_struct['custom_fields'] ) ) {
            $this->set_custom_fields( $post_id, $content_struct['custom_fields'] );
        }

        if ( isset( $content_struct['wp_post_thumbnail'] ) ) {
            if ( set_post_thumbnail( $post_id, $content_struct['wp_post_thumbnail'] ) === false ) {
                return new IXR_Error( 404, __( 'Invalid attachment ID.' ) );
            }

            unset( $content_struct['wp_post_thumbnail'] );
        }

        // Handle enclosures.
        $thisEnclosure = isset( $content_struct['enclosure'] ) ? $content_struct['enclosure'] : null;
        $this->add_enclosure_if_new( $post_id, $thisEnclosure );

        $this->attach_uploads( $post_id, $post_content );

        /*
         * Handle post formats if assigned, value is validated earlier
         * in this function.
         */
        if ( isset( $content_struct['wp_post_format'] ) ) {
            set_post_format( $post_id, $content_struct['wp_post_format'] );
        }

        $post_id = wp_insert_post( $postdata, true );
        if ( is_wp_error( $post_id ) ) {
            return new IXR_Error( 500, $post_id->get_error_message() );
        }

        if ( ! $post_id ) {
            return new IXR_Error( 500, __( 'Sorry, the post could not be created.' ) );
        }

        /**
         * Fires after a new post has been successfully created via the XML-RPC MovableType API.
         *
         * @since 3.4.0
         *
         * @param int   $post_id ID of the new post.
         * @param array $args    An array of arguments to create the new post.
         */
        do_action( 'xmlrpc_call_success_mw_newPost', $post_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return (string) $post_id;
    }

    /**
     * Adds an enclosure to a post if it's new.
     *
     * @since 2.8.0
     *
     * @param int   $post_id   Post ID.
     * @param array $enclosure Enclosure data.
     */
    public function add_enclosure_if_new( $post_id, $enclosure ) {
        if ( is_array( $enclosure ) && isset( $enclosure['url'] ) && isset( $enclosure['length'] ) && isset( $enclosure['type'] ) ) {
            $encstring  = $enclosure['url'] . "\n" . $enclosure['length'] . "\n" . $enclosure['type'] . "\n";
            $found      = false;
            $enclosures = get_post_meta( $post_id, 'enclosure' );
            if ( $enclosures ) {
                foreach ( $enclosures as $enc ) {
                    // This method used to omit the trailing new line. #23219
                    if ( rtrim( $enc, "\n" ) === rtrim( $encstring, "\n" ) ) {
                        $found = true;
                        break;
                    }
                }
            }
            if ( ! $found ) {
                add_post_meta( $post_id, 'enclosure', $encstring );
            }
        }
    }

    /**
     * Attaches an upload to a post.
     *
     * @since 2.1.0
     *
     * @global wpdb $wpdb WordPress database abstraction object.
     *
     * @param int    $post_id      Post ID.
     * @param string $post_content Post Content for attachment.
     */
    public function attach_uploads( $post_id, $post_content ) {
        global $wpdb;

        // Find any unattached files.
        $attachments = $wpdb->get_results( "SELECT ID, guid FROM {$wpdb->posts} WHERE post_parent = '0' AND post_type = 'attachment'" );
        if ( is_array( $attachments ) ) {
            foreach ( $attachments as $file ) {
                if ( ! empty( $file->guid ) && str_contains( $post_content, $file->guid ) ) {
                    $wpdb->update( $wpdb->posts, array( 'post_parent' => $post_id ), array( 'ID' => $file->ID ) );
                }
            }
        }
    }

    /**
     * Edits a post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Post ID.
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Content structure.
     *     @type int    $4 Optional. Publish flag. 0 for draft, 1 for publish. Default 0.
     * }
     * @return true|IXR_Error True on success.
     */
    public function mw_editPost( $args ) {
        $this->escape( $args );

        $post_id        = (int) $args[0];
        $username       = $args[1];
        $password       = $args[2];
        $content_struct = $args[3];
        $publish        = isset( $args[4] ) ? $args[4] : 0;

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'metaWeblog.editPost', $args, $this );

        $postdata = get_post( $post_id, ARRAY_A );

        /*
         * If there is no post data for the give post ID, stop now and return an error.
         * Otherwise a new post will be created (which was the old behavior).
         */
        if ( ! $postdata || empty( $postdata['ID'] ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        // Use wp.editPost to edit post types other than post and page.
        if ( ! in_array( $postdata['post_type'], array( 'post', 'page' ), true ) ) {
            return new IXR_Error( 401, __( 'Invalid post type.' ) );
        }

        // Thwart attempt to change the post type.
        if ( ! empty( $content_struct['post_type'] ) && ( $content_struct['post_type'] != $postdata['post_type'] ) ) {
            return new IXR_Error( 401, __( 'The post type may not be changed.' ) );
        }

        // Check for a valid post format if one was given.
        if ( isset( $content_struct['wp_post_format'] ) ) {
            $content_struct['wp_post_format'] = sanitize_key( $content_struct['wp_post_format'] );
            if ( ! array_key_exists( $content_struct['wp_post_format'], get_post_format_strings() ) ) {
                return new IXR_Error( 404, __( 'Invalid post format.' ) );
            }
        }

        $this->escape( $postdata );

        $ID             = $postdata['ID'];
        $post_content   = $postdata['post_content'];
        $post_title     = $postdata['post_title'];
        $post_excerpt   = $postdata['post_excerpt'];
        $post_password  = $postdata['post_password'];
        $post_parent    = $postdata['post_parent'];
        $post_type      = $postdata['post_type'];
        $menu_order     = $postdata['menu_order'];
        $ping_status    = $postdata['ping_status'];
        $comment_status = $postdata['comment_status'];

        // Let WordPress manage slug if none was provided.
        $post_name = $postdata['post_name'];
        if ( isset( $content_struct['wp_slug'] ) ) {
            $post_name = $content_struct['wp_slug'];
        }

        // Only use a password if one was given.
        if ( isset( $content_struct['wp_password'] ) ) {
            $post_password = $content_struct['wp_password'];
        }

        // Only set a post parent if one was given.
        if ( isset( $content_struct['wp_page_parent_id'] ) ) {
            $post_parent = $content_struct['wp_page_parent_id'];
        }

        // Only set the 'menu_order' if it was given.
        if ( isset( $content_struct['wp_page_order'] ) ) {
            $menu_order = $content_struct['wp_page_order'];
        }

        $page_template = '';
        if ( ! empty( $content_struct['wp_page_template'] ) && 'page' === $post_type ) {
            $page_template = $content_struct['wp_page_template'];
        }

        $post_author = $postdata['post_author'];

        // If an author id was provided then use it instead.
        if ( isset( $content_struct['wp_author_id'] ) ) {
            // Check permissions if attempting to switch author to or from another user.
            if ( $user->ID != $content_struct['wp_author_id'] || $user->ID != $post_author ) {
                switch ( $post_type ) {
                    case 'post':
                        if ( ! current_user_can( 'edit_others_posts' ) ) {
                            return new IXR_Error( 401, __( 'Sorry, you are not allowed to change the post author as this user.' ) );
                        }
                        break;
                    case 'page':
                        if ( ! current_user_can( 'edit_others_pages' ) ) {
                            return new IXR_Error( 401, __( 'Sorry, you are not allowed to change the page author as this user.' ) );
                        }
                        break;
                    default:
                        return new IXR_Error( 401, __( 'Invalid post type.' ) );
                }
                $post_author = $content_struct['wp_author_id'];
            }
        }

        if ( isset( $content_struct['mt_allow_comments'] ) ) {
            if ( ! is_numeric( $content_struct['mt_allow_comments'] ) ) {
                switch ( $content_struct['mt_allow_comments'] ) {
                    case 'closed':
                        $comment_status = 'closed';
                        break;
                    case 'open':
                        $comment_status = 'open';
                        break;
                    default:
                        $comment_status = get_default_comment_status( $post_type );
                        break;
                }
            } else {
                switch ( (int) $content_struct['mt_allow_comments'] ) {
                    case 0:
                    case 2:
                        $comment_status = 'closed';
                        break;
                    case 1:
                        $comment_status = 'open';
                        break;
                    default:
                        $comment_status = get_default_comment_status( $post_type );
                        break;
                }
            }
        }

        if ( isset( $content_struct['mt_allow_pings'] ) ) {
            if ( ! is_numeric( $content_struct['mt_allow_pings'] ) ) {
                switch ( $content_struct['mt_allow_pings'] ) {
                    case 'closed':
                        $ping_status = 'closed';
                        break;
                    case 'open':
                        $ping_status = 'open';
                        break;
                    default:
                        $ping_status = get_default_comment_status( $post_type, 'pingback' );
                        break;
                }
            } else {
                switch ( (int) $content_struct['mt_allow_pings'] ) {
                    case 0:
                        $ping_status = 'closed';
                        break;
                    case 1:
                        $ping_status = 'open';
                        break;
                    default:
                        $ping_status = get_default_comment_status( $post_type, 'pingback' );
                        break;
                }
            }
        }

        if ( isset( $content_struct['title'] ) ) {
            $post_title = $content_struct['title'];
        }

        if ( isset( $content_struct['description'] ) ) {
            $post_content = $content_struct['description'];
        }

        $post_category = array();
        if ( isset( $content_struct['categories'] ) ) {
            $catnames = $content_struct['categories'];
            if ( is_array( $catnames ) ) {
                foreach ( $catnames as $cat ) {
                    $post_category[] = get_cat_ID( $cat );
                }
            }
        }

        if ( isset( $content_struct['mt_excerpt'] ) ) {
            $post_excerpt = $content_struct['mt_excerpt'];
        }

        $post_more = isset( $content_struct['mt_text_more'] ) ? $content_struct['mt_text_more'] : '';

        $post_status = $publish ? 'publish' : 'draft';
        if ( isset( $content_struct[ "{$post_type}_status" ] ) ) {
            switch ( $content_struct[ "{$post_type}_status" ] ) {
                case 'draft':
                case 'pending':
                case 'private':
                case 'publish':
                    $post_status = $content_struct[ "{$post_type}_status" ];
                    break;
                default:
                    $post_status = $publish ? 'publish' : 'draft';
                    break;
            }
        }

        $tags_input = isset( $content_struct['mt_keywords'] ) ? $content_struct['mt_keywords'] : array();

        if ( 'publish' === $post_status || 'private' === $post_status ) {
            if ( 'page' === $post_type && ! current_user_can( 'publish_pages' ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish this page.' ) );
            } elseif ( ! current_user_can( 'publish_posts' ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish this post.' ) );
            }
        }

        if ( $post_more ) {
            $post_content = $post_content . '<!--more-->' . $post_more;
        }

        $to_ping = '';
        if ( isset( $content_struct['mt_tb_ping_urls'] ) ) {
            $to_ping = $content_struct['mt_tb_ping_urls'];
            if ( is_array( $to_ping ) ) {
                $to_ping = implode( ' ', $to_ping );
            }
        }

        // Do some timestamp voodoo.
        if ( ! empty( $content_struct['date_created_gmt'] ) ) {
            // We know this is supposed to be GMT, so we're going to slap that Z on there by force.
            $dateCreated = rtrim( $content_struct['date_created_gmt']->getIso(), 'Z' ) . 'Z';
        } elseif ( ! empty( $content_struct['dateCreated'] ) ) {
            $dateCreated = $content_struct['dateCreated']->getIso();
        }

        // Default to not flagging the post date to be edited unless it's intentional.
        $edit_date = false;

        if ( ! empty( $dateCreated ) ) {
            $post_date     = iso8601_to_datetime( $dateCreated );
            $post_date_gmt = iso8601_to_datetime( $dateCreated, 'gmt' );

            // Flag the post date to be edited.
            $edit_date = true;
        } else {
            $post_date     = $postdata['post_date'];
            $post_date_gmt = $postdata['post_date_gmt'];
        }

        // We've got all the data -- post it.
        $newpost = compact( 'ID', 'post_content', 'post_title', 'post_category', 'post_status', 'post_excerpt', 'comment_status', 'ping_status', 'edit_date', 'post_date', 'post_date_gmt', 'to_ping', 'post_name', 'post_password', 'post_parent', 'menu_order', 'post_author', 'tags_input', 'page_template' );

        $result = wp_update_post( $newpost, true );
        if ( is_wp_error( $result ) ) {
            return new IXR_Error( 500, $result->get_error_message() );
        }

        if ( ! $result ) {
            return new IXR_Error( 500, __( 'Sorry, the post could not be updated.' ) );
        }

        // Only posts can be sticky.
        if ( 'post' === $post_type && isset( $content_struct['sticky'] ) ) {
            $data              = $newpost;
            $data['sticky']    = $content_struct['sticky'];
            $data['post_type'] = 'post';
            $error             = $this->_toggle_sticky( $data, true );
            if ( $error ) {
                return $error;
            }
        }

        if ( isset( $content_struct['custom_fields'] ) ) {
            $this->set_custom_fields( $post_id, $content_struct['custom_fields'] );
        }

        if ( isset( $content_struct['wp_post_thumbnail'] ) ) {

            // Empty value deletes, non-empty value adds/updates.
            if ( empty( $content_struct['wp_post_thumbnail'] ) ) {
                delete_post_thumbnail( $post_id );
            } else {
                if ( set_post_thumbnail( $post_id, $content_struct['wp_post_thumbnail'] ) === false ) {
                    return new IXR_Error( 404, __( 'Invalid attachment ID.' ) );
                }
            }
            unset( $content_struct['wp_post_thumbnail'] );
        }

        // Handle enclosures.
        $thisEnclosure = isset( $content_struct['enclosure'] ) ? $content_struct['enclosure'] : null;
        $this->add_enclosure_if_new( $post_id, $thisEnclosure );

        $this->attach_uploads( $ID, $post_content );

        // Handle post formats if assigned, validation is handled earlier in this function.
        if ( isset( $content_struct['wp_post_format'] ) ) {
            set_post_format( $post_id, $content_struct['wp_post_format'] );
        }

        /**
         * Fires after a post has been successfully updated via the XML-RPC MovableType API.
         *
         * @since 3.4.0
         *
         * @param int   $post_id ID of the updated post.
         * @param array $args    An array of arguments to update the post.
         */
        do_action( 'xmlrpc_call_success_mw_editPost', $post_id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        return true;
    }

    /**
     * Retrieves a post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Post ID.
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function mw_getPost( $args ) {
        $this->escape( $args );

        $post_id  = (int) $args[0];
        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        $postdata = get_post( $post_id, ARRAY_A );
        if ( ! $postdata ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'metaWeblog.getPost', $args, $this );

        if ( '' !== $postdata['post_date'] ) {
            $post_date         = $this->_convert_date( $postdata['post_date'] );
            $post_date_gmt     = $this->_convert_date_gmt( $postdata['post_date_gmt'], $postdata['post_date'] );
            $post_modified     = $this->_convert_date( $postdata['post_modified'] );
            $post_modified_gmt = $this->_convert_date_gmt( $postdata['post_modified_gmt'], $postdata['post_modified'] );

            $categories = array();
            $catids     = wp_get_post_categories( $post_id );
            foreach ( $catids as $catid ) {
                $categories[] = get_cat_name( $catid );
            }

            $tagnames = array();
            $tags     = wp_get_post_tags( $post_id );
            if ( ! empty( $tags ) ) {
                foreach ( $tags as $tag ) {
                    $tagnames[] = $tag->name;
                }
                $tagnames = implode( ', ', $tagnames );
            } else {
                $tagnames = '';
            }

            $post = get_extended( $postdata['post_content'] );
            $link = get_permalink( $postdata['ID'] );

            // Get the author info.
            $author = get_userdata( $postdata['post_author'] );

            $allow_comments = ( 'open' === $postdata['comment_status'] ) ? 1 : 0;
            $allow_pings    = ( 'open' === $postdata['ping_status'] ) ? 1 : 0;

            // Consider future posts as published.
            if ( 'future' === $postdata['post_status'] ) {
                $postdata['post_status'] = 'publish';
            }

            // Get post format.
            $post_format = get_post_format( $post_id );
            if ( empty( $post_format ) ) {
                $post_format = 'standard';
            }

            $sticky = false;
            if ( is_sticky( $post_id ) ) {
                $sticky = true;
            }

            $enclosure = array();
            foreach ( (array) get_post_custom( $post_id ) as $key => $val ) {
                if ( 'enclosure' === $key ) {
                    foreach ( (array) $val as $enc ) {
                        $encdata             = explode( "\n", $enc );
                        $enclosure['url']    = trim( htmlspecialchars( $encdata[0] ) );
                        $enclosure['length'] = (int) trim( $encdata[1] );
                        $enclosure['type']   = trim( $encdata[2] );
                        break 2;
                    }
                }
            }

            $resp = array(
                'dateCreated'            => $post_date,
                'userid'                 => $postdata['post_author'],
                'postid'                 => $postdata['ID'],
                'description'            => $post['main'],
                'title'                  => $postdata['post_title'],
                'link'                   => $link,
                'permaLink'              => $link,
                // Commented out because no other tool seems to use this.
                // 'content' => $entry['post_content'],
                'categories'             => $categories,
                'mt_excerpt'             => $postdata['post_excerpt'],
                'mt_text_more'           => $post['extended'],
                'wp_more_text'           => $post['more_text'],
                'mt_allow_comments'      => $allow_comments,
                'mt_allow_pings'         => $allow_pings,
                'mt_keywords'            => $tagnames,
                'wp_slug'                => $postdata['post_name'],
                'wp_password'            => $postdata['post_password'],
                'wp_author_id'           => (string) $author->ID,
                'wp_author_display_name' => $author->display_name,
                'date_created_gmt'       => $post_date_gmt,
                'post_status'            => $postdata['post_status'],
                'custom_fields'          => $this->get_custom_fields( $post_id ),
                'wp_post_format'         => $post_format,
                'sticky'                 => $sticky,
                'date_modified'          => $post_modified,
                'date_modified_gmt'      => $post_modified_gmt,
            );

            if ( ! empty( $enclosure ) ) {
                $resp['enclosure'] = $enclosure;
            }

            $resp['wp_post_thumbnail'] = get_post_thumbnail_id( $postdata['ID'] );

            return $resp;
        } else {
            return new IXR_Error( 404, __( 'Sorry, no such post.' ) );
        }
    }

    /**
     * Retrieves list of recent posts.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Optional. Number of posts.
     * }
     * @return array|IXR_Error
     */
    public function mw_getRecentPosts( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        if ( isset( $args[3] ) ) {
            $query = array( 'numberposts' => absint( $args[3] ) );
        } else {
            $query = array();
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit posts.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'metaWeblog.getRecentPosts', $args, $this );

        $posts_list = wp_get_recent_posts( $query );

        if ( ! $posts_list ) {
            return array();
        }

        $recent_posts = array();
        foreach ( $posts_list as $entry ) {
            if ( ! current_user_can( 'edit_post', $entry['ID'] ) ) {
                continue;
            }

            $post_date         = $this->_convert_date( $entry['post_date'] );
            $post_date_gmt     = $this->_convert_date_gmt( $entry['post_date_gmt'], $entry['post_date'] );
            $post_modified     = $this->_convert_date( $entry['post_modified'] );
            $post_modified_gmt = $this->_convert_date_gmt( $entry['post_modified_gmt'], $entry['post_modified'] );

            $categories = array();
            $catids     = wp_get_post_categories( $entry['ID'] );
            foreach ( $catids as $catid ) {
                $categories[] = get_cat_name( $catid );
            }

            $tagnames = array();
            $tags     = wp_get_post_tags( $entry['ID'] );
            if ( ! empty( $tags ) ) {
                foreach ( $tags as $tag ) {
                    $tagnames[] = $tag->name;
                }
                $tagnames = implode( ', ', $tagnames );
            } else {
                $tagnames = '';
            }

            $post = get_extended( $entry['post_content'] );
            $link = get_permalink( $entry['ID'] );

            // Get the post author info.
            $author = get_userdata( $entry['post_author'] );

            $allow_comments = ( 'open' === $entry['comment_status'] ) ? 1 : 0;
            $allow_pings    = ( 'open' === $entry['ping_status'] ) ? 1 : 0;

            // Consider future posts as published.
            if ( 'future' === $entry['post_status'] ) {
                $entry['post_status'] = 'publish';
            }

            // Get post format.
            $post_format = get_post_format( $entry['ID'] );
            if ( empty( $post_format ) ) {
                $post_format = 'standard';
            }

            $recent_posts[] = array(
                'dateCreated'            => $post_date,
                'userid'                 => $entry['post_author'],
                'postid'                 => (string) $entry['ID'],
                'description'            => $post['main'],
                'title'                  => $entry['post_title'],
                'link'                   => $link,
                'permaLink'              => $link,
                // Commented out because no other tool seems to use this.
                // 'content' => $entry['post_content'],
                'categories'             => $categories,
                'mt_excerpt'             => $entry['post_excerpt'],
                'mt_text_more'           => $post['extended'],
                'wp_more_text'           => $post['more_text'],
                'mt_allow_comments'      => $allow_comments,
                'mt_allow_pings'         => $allow_pings,
                'mt_keywords'            => $tagnames,
                'wp_slug'                => $entry['post_name'],
                'wp_password'            => $entry['post_password'],
                'wp_author_id'           => (string) $author->ID,
                'wp_author_display_name' => $author->display_name,
                'date_created_gmt'       => $post_date_gmt,
                'post_status'            => $entry['post_status'],
                'custom_fields'          => $this->get_custom_fields( $entry['ID'] ),
                'wp_post_format'         => $post_format,
                'date_modified'          => $post_modified,
                'date_modified_gmt'      => $post_modified_gmt,
                'sticky'                 => ( 'post' === $entry['post_type'] && is_sticky( $entry['ID'] ) ),
                'wp_post_thumbnail'      => get_post_thumbnail_id( $entry['ID'] ),
            );
        }

        return $recent_posts;
    }

    /**
     * Retrieves the list of categories on a given blog.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function mw_getCategories( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you must be able to edit posts on this site in order to view categories.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'metaWeblog.getCategories', $args, $this );

        $categories_struct = array();

        $cats = get_categories( array( 'get' => 'all' ) );
        if ( $cats ) {
            foreach ( $cats as $cat ) {
                $struct                        = array();
                $struct['categoryId']          = $cat->term_id;
                $struct['parentId']            = $cat->parent;
                $struct['description']         = $cat->name;
                $struct['categoryDescription'] = $cat->description;
                $struct['categoryName']        = $cat->name;
                $struct['htmlUrl']             = esc_html( get_category_link( $cat->term_id ) );
                $struct['rssUrl']              = esc_html( get_category_feed_link( $cat->term_id, 'rss2' ) );

                $categories_struct[] = $struct;
            }
        }

        return $categories_struct;
    }

    /**
     * Uploads a file, following your settings.
     *
     * Adapted from a patch by Johann Richard.
     *
     * @link http://mycvs.org/archives/2004/06/30/file-upload-to-wordpress-in-ecto/
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Data.
     * }
     * @return array|IXR_Error
     */
    public function mw_newMediaObject( $args ) {
        $username = $this->escape( $args[1] );
        $password = $this->escape( $args[2] );
        $data     = $args[3];

        $name = sanitize_file_name( $data['name'] );
        $type = $data['type'];
        $bits = $data['bits'];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'metaWeblog.newMediaObject', $args, $this );

        if ( ! current_user_can( 'upload_files' ) ) {
            $this->error = new IXR_Error( 401, __( 'Sorry, you are not allowed to upload files.' ) );
            return $this->error;
        }

        if ( is_multisite() && upload_is_user_over_quota( false ) ) {
            $this->error = new IXR_Error(
                401,
                sprintf(
                    /* translators: %s: Allowed space allocation. */
                    __( 'Sorry, you have used your space allocation of %s. Please delete some files to upload more files.' ),
                    size_format( get_space_allowed() * MB_IN_BYTES )
                )
            );
            return $this->error;
        }

        /**
         * Filters whether to preempt the XML-RPC media upload.
         *
         * Returning a truthy value will effectively short-circuit the media upload,
         * returning that value as a 500 error instead.
         *
         * @since 2.1.0
         *
         * @param bool $error Whether to pre-empt the media upload. Default false.
         */
        $upload_err = apply_filters( 'pre_upload_error', false );
        if ( $upload_err ) {
            return new IXR_Error( 500, $upload_err );
        }

        $upload = wp_upload_bits( $name, null, $bits );
        if ( ! empty( $upload['error'] ) ) {
            /* translators: 1: File name, 2: Error message. */
            $errorString = sprintf( __( 'Could not write file %1$s (%2$s).' ), $name, $upload['error'] );
            return new IXR_Error( 500, $errorString );
        }
        // Construct the attachment array.
        $post_id = 0;
        if ( ! empty( $data['post_id'] ) ) {
            $post_id = (int) $data['post_id'];

            if ( ! current_user_can( 'edit_post', $post_id ) ) {
                return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
            }
        }
        $attachment = array(
            'post_title'     => $name,
            'post_content'   => '',
            'post_type'      => 'attachment',
            'post_parent'    => $post_id,
            'post_mime_type' => $type,
            'guid'           => $upload['url'],
        );

        // Save the data.
        $id = wp_insert_attachment( $attachment, $upload['file'], $post_id );
        wp_update_attachment_metadata( $id, wp_generate_attachment_metadata( $id, $upload['file'] ) );

        /**
         * Fires after a new attachment has been added via the XML-RPC MovableType API.
         *
         * @since 3.4.0
         *
         * @param int   $id   ID of the new attachment.
         * @param array $args An array of arguments to add the attachment.
         */
        do_action( 'xmlrpc_call_success_mw_newMediaObject', $id, $args ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.NotLowercase

        $struct = $this->_prepare_media_item( get_post( $id ) );

        // Deprecated values.
        $struct['id']   = $struct['attachment_id'];
        $struct['file'] = $struct['title'];
        $struct['url']  = $struct['link'];

        return $struct;
    }

    /*
     * MovableType API functions.
     * Specs archive on http://web.archive.org/web/20050220091302/http://www.movabletype.org:80/docs/mtmanual_programmatic.html
     */

    /**
     * Retrieves the post titles of recent posts.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type int    $3 Optional. Number of posts.
     * }
     * @return array|IXR_Error
     */
    public function mt_getRecentPostTitles( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];
        if ( isset( $args[3] ) ) {
            $query = array( 'numberposts' => absint( $args[3] ) );
        } else {
            $query = array();
        }

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.getRecentPostTitles', $args, $this );

        $posts_list = wp_get_recent_posts( $query );

        if ( ! $posts_list ) {
            $this->error = new IXR_Error( 500, __( 'Either there are no posts, or something went wrong.' ) );
            return $this->error;
        }

        $recent_posts = array();

        foreach ( $posts_list as $entry ) {
            if ( ! current_user_can( 'edit_post', $entry['ID'] ) ) {
                continue;
            }

            $post_date     = $this->_convert_date( $entry['post_date'] );
            $post_date_gmt = $this->_convert_date_gmt( $entry['post_date_gmt'], $entry['post_date'] );

            $recent_posts[] = array(
                'dateCreated'      => $post_date,
                'userid'           => $entry['post_author'],
                'postid'           => (string) $entry['ID'],
                'title'            => $entry['post_title'],
                'post_status'      => $entry['post_status'],
                'date_created_gmt' => $post_date_gmt,
            );
        }

        return $recent_posts;
    }

    /**
     * Retrieves the list of all categories on a blog.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Blog ID (unused).
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function mt_getCategoryList( $args ) {
        $this->escape( $args );

        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! current_user_can( 'edit_posts' ) ) {
            return new IXR_Error( 401, __( 'Sorry, you must be able to edit posts on this site in order to view categories.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.getCategoryList', $args, $this );

        $categories_struct = array();

        $cats = get_categories(
            array(
                'hide_empty'   => 0,
                'hierarchical' => 0,
            )
        );
        if ( $cats ) {
            foreach ( $cats as $cat ) {
                $struct                 = array();
                $struct['categoryId']   = $cat->term_id;
                $struct['categoryName'] = $cat->name;

                $categories_struct[] = $struct;
            }
        }

        return $categories_struct;
    }

    /**
     * Retrieves post categories.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Post ID.
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return array|IXR_Error
     */
    public function mt_getPostCategories( $args ) {
        $this->escape( $args );

        $post_id  = (int) $args[0];
        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        if ( ! get_post( $post_id ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.getPostCategories', $args, $this );

        $categories = array();
        $catids     = wp_get_post_categories( (int) $post_id );
        // First listed category will be the primary category.
        $isPrimary = true;
        foreach ( $catids as $catid ) {
            $categories[] = array(
                'categoryName' => get_cat_name( $catid ),
                'categoryId'   => (string) $catid,
                'isPrimary'    => $isPrimary,
            );
            $isPrimary    = false;
        }

        return $categories;
    }

    /**
     * Sets categories for a post.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Post ID.
     *     @type string $1 Username.
     *     @type string $2 Password.
     *     @type array  $3 Categories.
     * }
     * @return true|IXR_Error True on success.
     */
    public function mt_setPostCategories( $args ) {
        $this->escape( $args );

        $post_id    = (int) $args[0];
        $username   = $args[1];
        $password   = $args[2];
        $categories = $args[3];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.setPostCategories', $args, $this );

        if ( ! get_post( $post_id ) ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to edit this post.' ) );
        }

        $catids = array();
        foreach ( $categories as $cat ) {
            $catids[] = $cat['categoryId'];
        }

        wp_set_post_categories( $post_id, $catids );

        return true;
    }

    /**
     * Retrieves an array of methods supported by this server.
     *
     * @since 1.5.0
     *
     * @return array
     */
    public function mt_supportedMethods() {
        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.supportedMethods', array(), $this );

        return array_keys( $this->methods );
    }

    /**
     * Retrieves an empty array because we don't support per-post text filters.
     *
     * @since 1.5.0
     */
    public function mt_supportedTextFilters() {
        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.supportedTextFilters', array(), $this );

        /**
         * Filters the MoveableType text filters list for XML-RPC.
         *
         * @since 2.2.0
         *
         * @param array $filters An array of text filters.
         */
        return apply_filters( 'xmlrpc_text_filters', array() );
    }

    /**
     * Retrieves trackbacks sent to a given post.
     *
     * @since 1.5.0
     *
     * @global wpdb $wpdb WordPress database abstraction object.
     *
     * @param int $post_id
     * @return array|IXR_Error
     */
    public function mt_getTrackbackPings( $post_id ) {
        global $wpdb;

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.getTrackbackPings', $post_id, $this );

        $actual_post = get_post( $post_id, ARRAY_A );

        if ( ! $actual_post ) {
            return new IXR_Error( 404, __( 'Sorry, no such post.' ) );
        }

        $comments = $wpdb->get_results( $wpdb->prepare( "SELECT comment_author_url, comment_content, comment_author_IP, comment_type FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ) );

        if ( ! $comments ) {
            return array();
        }

        $trackback_pings = array();
        foreach ( $comments as $comment ) {
            if ( 'trackback' === $comment->comment_type ) {
                $content           = $comment->comment_content;
                $title             = substr( $content, 8, ( strpos( $content, '</strong>' ) - 8 ) );
                $trackback_pings[] = array(
                    'pingTitle' => $title,
                    'pingURL'   => $comment->comment_author_url,
                    'pingIP'    => $comment->comment_author_IP,
                );
            }
        }

        return $trackback_pings;
    }

    /**
     * Sets a post's publish status to 'publish'.
     *
     * @since 1.5.0
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type int    $0 Post ID.
     *     @type string $1 Username.
     *     @type string $2 Password.
     * }
     * @return int|IXR_Error
     */
    public function mt_publishPost( $args ) {
        $this->escape( $args );

        $post_id  = (int) $args[0];
        $username = $args[1];
        $password = $args[2];

        $user = $this->login( $username, $password );
        if ( ! $user ) {
            return $this->error;
        }

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'mt.publishPost', $args, $this );

        $postdata = get_post( $post_id, ARRAY_A );
        if ( ! $postdata ) {
            return new IXR_Error( 404, __( 'Invalid post ID.' ) );
        }

        if ( ! current_user_can( 'publish_posts' ) || ! current_user_can( 'edit_post', $post_id ) ) {
            return new IXR_Error( 401, __( 'Sorry, you are not allowed to publish this post.' ) );
        }

        $postdata['post_status'] = 'publish';

        // Retain old categories.
        $postdata['post_category'] = wp_get_post_categories( $post_id );
        $this->escape( $postdata );

        return wp_update_post( $postdata );
    }

    /*
     * Pingback functions.
     * Specs on www.hixie.ch/specs/pingback/pingback
     */

    /**
     * Retrieves a pingback and registers it.
     *
     * @since 1.5.0
     *
     * @global wpdb $wpdb WordPress database abstraction object.
     *
     * @param array $args {
     *     Method arguments. Note: arguments must be ordered as documented.
     *
     *     @type string $0 URL of page linked from.
     *     @type string $1 URL of page linked to.
     * }
     * @return string|IXR_Error
     */
    public function pingback_ping( $args ) {
        global $wpdb;

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'pingback.ping', $args, $this );

        $this->escape( $args );

        $pagelinkedfrom = str_replace( '&amp;', '&', $args[0] );
        $pagelinkedto   = str_replace( '&amp;', '&', $args[1] );
        $pagelinkedto   = str_replace( '&', '&amp;', $pagelinkedto );

        /**
         * Filters the pingback source URI.
         *
         * @since 3.6.0
         *
         * @param string $pagelinkedfrom URI of the page linked from.
         * @param string $pagelinkedto   URI of the page linked to.
         */
        $pagelinkedfrom = apply_filters( 'pingback_ping_source_uri', $pagelinkedfrom, $pagelinkedto );

        if ( ! $pagelinkedfrom ) {
            return $this->pingback_error( 0, __( 'A valid URL was not provided.' ) );
        }

        // Check if the page linked to is on our site.
        $pos1 = strpos( $pagelinkedto, str_replace( array( 'http://www.', 'http://', 'https://www.', 'https://' ), '', get_option( 'home' ) ) );
        if ( ! $pos1 ) {
            return $this->pingback_error( 0, __( 'Is there no link to us?' ) );
        }

        /*
         * Let's find which post is linked to.
         * FIXME: Does url_to_postid() cover all these cases already?
         * If so, then let's use it and drop the old code.
         */
        $urltest = parse_url( $pagelinkedto );
        $post_id = url_to_postid( $pagelinkedto );
        if ( $post_id ) {
            // $way
        } elseif ( isset( $urltest['path'] ) && preg_match( '#p/[0-9]{1,}#', $urltest['path'], $match ) ) {
            // The path defines the post_ID (archives/p/XXXX).
            $blah    = explode( '/', $match[0] );
            $post_id = (int) $blah[1];
        } elseif ( isset( $urltest['query'] ) && preg_match( '#p=[0-9]{1,}#', $urltest['query'], $match ) ) {
            // The query string defines the post_ID (?p=XXXX).
            $blah    = explode( '=', $match[0] );
            $post_id = (int) $blah[1];
        } elseif ( isset( $urltest['fragment'] ) ) {
            // An #anchor is there, it's either...
            if ( (int) $urltest['fragment'] ) {
                // ...an integer #XXXX (simplest case),
                $post_id = (int) $urltest['fragment'];
            } elseif ( preg_match( '/post-[0-9]+/', $urltest['fragment'] ) ) {
                // ...a post ID in the form 'post-###',
                $post_id = preg_replace( '/[^0-9]+/', '', $urltest['fragment'] );
            } elseif ( is_string( $urltest['fragment'] ) ) {
                // ...or a string #title, a little more complicated.
                $title   = preg_replace( '/[^a-z0-9]/i', '.', $urltest['fragment'] );
                $sql     = $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title RLIKE %s", $title );
                $post_id = $wpdb->get_var( $sql );
                if ( ! $post_id ) {
                    // Returning unknown error '0' is better than die()'ing.
                    return $this->pingback_error( 0, '' );
                }
            }
        } else {
            // TODO: Attempt to extract a post ID from the given URL.
            return $this->pingback_error( 33, __( 'The specified target URL cannot be used as a target. It either does not exist, or it is not a pingback-enabled resource.' ) );
        }
        $post_id = (int) $post_id;

        $post = get_post( $post_id );

        if ( ! $post ) { // Post not found.
            return $this->pingback_error( 33, __( 'The specified target URL cannot be used as a target. It either does not exist, or it is not a pingback-enabled resource.' ) );
        }

        if ( url_to_postid( $pagelinkedfrom ) == $post_id ) {
            return $this->pingback_error( 0, __( 'The source URL and the target URL cannot both point to the same resource.' ) );
        }

        // Check if pings are on.
        if ( ! pings_open( $post ) ) {
            return $this->pingback_error( 33, __( 'The specified target URL cannot be used as a target. It either does not exist, or it is not a pingback-enabled resource.' ) );
        }

        // Let's check that the remote site didn't already pingback this entry.
        if ( $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s", $post_id, $pagelinkedfrom ) ) ) {
            return $this->pingback_error( 48, __( 'The pingback has already been registered.' ) );
        }

        /*
         * The remote site may have sent the pingback before it finished publishing its own content
         * containing this pingback URL. If that happens then it won't be immediately possible to fetch
         * the pinging post; adding a small delay reduces the likelihood of this happening.
         *
         * While there are more robust methods than calling `sleep()` here (because `sleep()` merely
         * mitigates the risk of requesting the remote post before it's available), this is effective
         * enough for most cases and avoids introducing more complexity into this code.
         *
         * One way to improve the reliability of this code might be to add failure-handling to the remote
         * fetch and retry up to a set number of times if it receives a 404. This could also handle 401 and
         * 403 responses to differentiate the "does not exist" failure from the "may not access" failure.
         */
        sleep( 1 );

        $remote_ip = preg_replace( '/[^0-9a-fA-F:., ]/', '', $_SERVER['REMOTE_ADDR'] );

        /** This filter is documented in wp-includes/class-wp-http.php */
        $user_agent = apply_filters( 'http_headers_useragent', 'WordPress/' . get_bloginfo( 'version' ) . '; ' . get_bloginfo( 'url' ), $pagelinkedfrom );

        // Let's check the remote site.
        $http_api_args = array(
            'timeout'             => 10,
            'redirection'         => 0,
            'limit_response_size' => 153600, // 150 KB
            'user-agent'          => "$user_agent; verifying pingback from $remote_ip",
            'headers'             => array(
                'X-Pingback-Forwarded-For' => $remote_ip,
            ),
        );

        $request                = wp_safe_remote_get( $pagelinkedfrom, $http_api_args );
        $remote_source          = wp_remote_retrieve_body( $request );
        $remote_source_original = $remote_source;

        if ( ! $remote_source ) {
            return $this->pingback_error( 16, __( 'The source URL does not exist.' ) );
        }

        /**
         * Filters the pingback remote source.
         *
         * @since 2.5.0
         *
         * @param string $remote_source Response source for the page linked from.
         * @param string $pagelinkedto  URL of the page linked to.
         */
        $remote_source = apply_filters( 'pre_remote_source', $remote_source, $pagelinkedto );

        // Work around bug in strip_tags():
        $remote_source = str_replace( '<!DOC', '<DOC', $remote_source );
        $remote_source = preg_replace( '/[\r\n\t ]+/', ' ', $remote_source ); // normalize spaces
        $remote_source = preg_replace( '/<\/*(h1|h2|h3|h4|h5|h6|p|th|td|li|dt|dd|pre|caption|input|textarea|button|body)[^>]*>/', "\n\n", $remote_source );

        preg_match( '|<title>([^<]*?)</title>|is', $remote_source, $matchtitle );
        $title = isset( $matchtitle[1] ) ? $matchtitle[1] : '';
        if ( empty( $title ) ) {
            return $this->pingback_error( 32, __( 'A title on that page cannot be found.' ) );
        }

        // Remove all script and style tags including their content.
        $remote_source = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $remote_source );
        // Just keep the tag we need.
        $remote_source = strip_tags( $remote_source, '<a>' );

        $p = explode( "\n\n", $remote_source );

        $preg_target = preg_quote( $pagelinkedto, '|' );

        foreach ( $p as $para ) {
            if ( str_contains( $para, $pagelinkedto ) ) { // It exists, but is it a link?
                preg_match( '|<a[^>]+?' . $preg_target . '[^>]*>([^>]+?)</a>|', $para, $context );

                // If the URL isn't in a link context, keep looking.
                if ( empty( $context ) ) {
                    continue;
                }

                /*
                 * We're going to use this fake tag to mark the context in a bit.
                 * The marker is needed in case the link text appears more than once in the paragraph.
                 */
                $excerpt = preg_replace( '|\</?wpcontext\>|', '', $para );

                // prevent really long link text
                if ( strlen( $context[1] ) > 100 ) {
                    $context[1] = substr( $context[1], 0, 100 ) . '&#8230;';
                }

                $marker      = '<wpcontext>' . $context[1] . '</wpcontext>';  // Set up our marker.
                $excerpt     = str_replace( $context[0], $marker, $excerpt ); // Swap out the link for our marker.
                $excerpt     = strip_tags( $excerpt, '<wpcontext>' );         // Strip all tags but our context marker.
                $excerpt     = trim( $excerpt );
                $preg_marker = preg_quote( $marker, '|' );
                $excerpt     = preg_replace( "|.*?\s(.{0,100}$preg_marker.{0,100})\s.*|s", '$1', $excerpt );
                $excerpt     = strip_tags( $excerpt ); // YES, again, to remove the marker wrapper.
                break;
            }
        }

        if ( empty( $context ) ) { // Link to target not found.
            return $this->pingback_error( 17, __( 'The source URL does not contain a link to the target URL, and so cannot be used as a source.' ) );
        }

        $pagelinkedfrom = str_replace( '&', '&amp;', $pagelinkedfrom );

        $context        = '[&#8230;] ' . esc_html( $excerpt ) . ' [&#8230;]';
        $pagelinkedfrom = $this->escape( $pagelinkedfrom );

        $comment_post_id      = (int) $post_id;
        $comment_author       = $title;
        $comment_author_email = '';
        $this->escape( $comment_author );
        $comment_author_url = $pagelinkedfrom;
        $comment_content    = $context;
        $this->escape( $comment_content );
        $comment_type = 'pingback';

        $commentdata = array(
            'comment_post_ID' => $comment_post_id,
        );

        $commentdata += compact(
            'comment_author',
            'comment_author_url',
            'comment_author_email',
            'comment_content',
            'comment_type',
            'remote_source',
            'remote_source_original'
        );

        $comment_id = wp_new_comment( $commentdata );

        if ( is_wp_error( $comment_id ) ) {
            return $this->pingback_error( 0, $comment_id->get_error_message() );
        }

        /**
         * Fires after a post pingback has been sent.
         *
         * @since 0.71
         *
         * @param int $comment_id Comment ID.
         */
        do_action( 'pingback_post', $comment_id );

        /* translators: 1: URL of the page linked from, 2: URL of the page linked to. */
        return sprintf( __( 'Pingback from %1$s to %2$s registered. Keep the web talking! :-)' ), $pagelinkedfrom, $pagelinkedto );
    }

    /**
     * Retrieves an array of URLs that pingbacked the given URL.
     *
     * Specs on http://www.aquarionics.com/misc/archives/blogite/0198.html
     *
     * @since 1.5.0
     *
     * @global wpdb $wpdb WordPress database abstraction object.
     *
     * @param string $url
     * @return array|IXR_Error
     */
    public function pingback_extensions_getPingbacks( $url ) {
        global $wpdb;

        /** This action is documented in wp-includes/class-wp-xmlrpc-server.php */
        do_action( 'xmlrpc_call', 'pingback.extensions.getPingbacks', $url, $this );

        $url = $this->escape( $url );

        $post_id = url_to_postid( $url );
        if ( ! $post_id ) {
            // We aren't sure that the resource is available and/or pingback enabled.
            return $this->pingback_error( 33, __( 'The specified target URL cannot be used as a target. It either does not exist, or it is not a pingback-enabled resource.' ) );
        }

        $actual_post = get_post( $post_id, ARRAY_A );

        if ( ! $actual_post ) {
            // No such post = resource not found.
            return $this->pingback_error( 32, __( 'The specified target URL does not exist.' ) );
        }

        $comments = $wpdb->get_results( $wpdb->prepare( "SELECT comment_author_url, comment_content, comment_author_IP, comment_type FROM $wpdb->comments WHERE comment_post_ID = %d", $post_id ) );

        if ( ! $comments ) {
            return array();
        }

        $pingbacks = array();
        foreach ( $comments as $comment ) {
            if ( 'pingback' === $comment->comment_type ) {
                $pingbacks[] = $comment->comment_author_url;
            }
        }

        return $pingbacks;
    }

    /**
     * Sends a pingback error based on the given error code and message.
     *
     * @since 3.6.0
     *
     * @param int    $code    Error code.
     * @param string $message Error message.
     * @return IXR_Error Error object.
     */
    protected function pingback_error( $code, $message ) {
        /**
         * Filters the XML-RPC pingback error return.
         *
         * @since 3.5.1
         *
         * @param IXR_Error $error An IXR_Error object containing the error code and message.
         */
        return apply_filters( 'xmlrpc_pingback_error', new IXR_Error( $code, $message ) );
    }
}