stevegrunwell/schemify

<?php
/**
 * The MediaObject Schema.
 *
 * @package Schemify
 * @link    http://schema.org/MediaObject
 */

namespace Schemify\Schemas;

use Schemify\Core as Core;

class MediaObject extends CreativeWork {

    /**
     * The properties this schema may utilize.
     *
     * @var array $properties
     */
    protected static $properties = array(
        'associatedArticle',
        'bitrate',
        'contentSize',
        'contentUrl',
        'duration',
        'embedUrl',
        'encodesCreativeWork',
        'encodingFormat',
        'expires',
        'height',
        'playerType',
        'productionCompany',
        'regionsAllowed',
        'requiresSubscription',
        'uploadDate',
        'width',
    );

    /**
     * Get the associated (attached) post object.
     *
     * @throws \Exception When unable to load a schema.
     *
     * @param int $post_id The post ID.
     * @return CreativeWork|null A CreativeWork object or null if the attachment is unattached.
     */
    public function getAssociatedArticle( $post_id ) {
        if ( ! $this->isMain ) {
            return null;
        }

        $parent_post_id = wp_get_post_parent_id( $post_id );

        // Return early if the media is unattached.
        if ( ! $parent_post_id ) {
            return;
        }

        // Proceed building the parent post's schema.
        $schema   = __NAMESPACE__ . '\\' . Core\get_schema_name( $parent_post_id, 'post' );
        $instance = null;

        try {
            if ( ! class_exists( $schema ) ) {
                throw new \Exception( esc_html__( 'Schema is not defined', 'schemify' ) );
            }

            $instance = new $schema( $parent_post_id );

        } catch ( \Exception $e ) {
            trigger_error( esc_html( sprintf(
                /* Translators: %1$s is the schema name, %2$s is the error message. */
                __( 'Unable to load schema %1$s: %2$s', 'schemify' ),
                $schema,
                $e->getMessage()
            ) ), E_USER_WARNING );
        }

        return $instance;
    }

    /**
     * Get the actual content URL.
     *
     * @param int $post_id The attachment ID.
     * @return string The content URL.
     */
    public function getContentUrl( $post_id ) {
        return wp_get_attachment_url( $post_id );
    }

    /**
     * Retrieve the thumbnail URL for a post.
     *
     * @param int $post_id The post ID.
     * @return string The post's URL.
     */
    public function getThumbnailUrl( $post_id ) {
        $thumbnail = wp_get_attachment_image_src( $post_id, 'thumbnail', true );

        return $thumbnail ? $thumbnail[0] : null;
    }
}