seb86/Auto-Load-Next-Post

<?php
/**
 * Auto Load Next Post - AJAX Events.
 *
 * @since    1.6.0
 * @author   Sébastien Dumont
 * @category Classes
 * @package  Auto Load Next Post/Classes/AJAX
 * @license  GPL-2.0+
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

if ( ! class_exists( 'ALNP_AJAX' ) ) {

    class ALNP_AJAX {

        /**
         * Constructor.
         *
         * @access public
         */
        public function __construct() {
            self::add_ajax_events();
        } // END __construct()

        /**
         * Hook in methods - uses WordPress Ajax handlers (admin-ajax).
         *
         * @access public
         * @static
         */
        public static function add_ajax_events() {
            $ajax_events = array(
                'find_template_location'        => true,
                'get_container_selectors'       => true,
                'get_title_selectors'           => true,
                'get_post_navigation_selectors' => true,
                'get_comment_selectors'         => true,
                'set_setting'                   => true,
            );

            foreach ( $ajax_events as $ajax_event => $nopriv ) {
                add_action( 'wp_ajax_alnp_' . $ajax_event, array( __CLASS__, $ajax_event ) );

                if ( $nopriv ) {
                    add_action( 'wp_ajax_nopriv_alnp_' . $ajax_event, array( __CLASS__, $ajax_event ) );
                }
            }
        } // END add_ajax_events()

        /**
         * Find template location.
         *
         * @access public
         * @static
         * @return string|int
         */
        public static function find_template_location() {
            $post_type = isset( $_GET['post_type'] ) ? $_GET['post_type'] : 'post';

            if ( empty( $post_type ) ) {
                wp_send_json( -1 );
                wp_die();
            }

            // Scan directories and saves the location.
            alnp_scan_directories( $post_type );

            // Get directory location.
            $directory = alnp_get_template_directory( $post_type );

            // Return if directory was saved.
            if ( ! empty( $directory ) || $directory == null ) {
                wp_send_json( $directory );
            } else {
                wp_send_json( -1 );
            }

            wp_die();
        } // END find_template_location()

        /**
         * Return container theme selectors.
         *
         * @access public
         * @static
         * @return json $selectors
         */
        public static function get_container_selectors() {
            $selectors = array(
                'main.site-main',
                'main#main',
                'main.post-wrap',
                'div#main',
                'div.site-content',
                'div#content',
                'div.content-container'
            );

            wp_send_json( $selectors );
            wp_die();
        } // END get_container_selectors()

        /**
         * Return title theme selectors.
         *
         * @access public
         * @static
         * @return json $selectors
         */
        public static function get_title_selectors() {
            $selectors = array(
                'h1.entry-title',
                'h1.post-title',
                'h1.page-title',
                'h1.title-single',
                'h1'
            );

            wp_send_json( $selectors );
            wp_die();
        } // END get_title_selectors()

        /**
         * Return post navigation theme selectors.
         *
         * @access public
         * @static
         * @return json $selectors
         */
        public static function get_post_navigation_selectors() {
            $selectors = array(
                'nav.post-navigation',
                'nav.navigation-post',
                'nav.navigation',
                'div.navigation',
                'nav#nav-below',
                '#nav-single',
                'div.next-prev',
                'nav.prev-next-nav'
            );

            wp_send_json( $selectors );
            wp_die();
        } // END get_post_navigation_selectors()

        /**
         * Return comments container theme selectors.
         *
         * @access public
         * @static
         * @return json $selectors
         */
        public static function get_comment_selectors() {
            $selectors = array(
                'div#comments',
                'section#comments'
            );

            wp_send_json( $selectors );
            wp_die();
        } // END get_comment_selectors()

        /**
         * Sets an Auto Load Next Post Setting.
         *
         * @access public
         * @static
         * @return bool
         */
        public static function set_setting() {
            $setting = isset( $_POST['setting'] ) ? $_POST['setting'] : '';
            $value   = isset( $_POST['value'] ) ? $_POST['value'] : '';

            if ( empty( $setting ) && empty( $value ) ) {
                wp_send_json( -1 );
                wp_die();
            }

            update_option( 'auto_load_next_post_' . $setting, $value );

            wp_send_json( 1 );
            wp_die();
        } // END set_setting()

    } // END class

} // END if class exists

return new ALNP_AJAX();