woothemes/woocommerce

<?php
/**
 * Product Images
 *
 * Display the product images meta box.
 *
 * @author      WooThemes
 * @category    Admin
 * @package     WooCommerce\Admin\Meta Boxes
 * @version     2.1.0
 */

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

/**
 * WC_Meta_Box_Product_Images Class.
 */
class WC_Meta_Box_Product_Images {

    /**
     * Output the metabox.
     *
     * @param WP_Post $post
     */
    public static function output( $post ) {
        global $thepostid, $product_object;

        $thepostid      = $post->ID;
        $product_object = $thepostid ? wc_get_product( $thepostid ) : new WC_Product();
        wp_nonce_field( 'woocommerce_save_data', 'woocommerce_meta_nonce' );
        ?>
        <div id="product_images_container">
            <ul class="product_images">
                <?php
                $product_image_gallery = $product_object->get_gallery_image_ids( 'edit' );

                $attachments         = array_filter( $product_image_gallery );
                $update_meta         = false;
                $updated_gallery_ids = array();

                if ( ! empty( $attachments ) ) {
                    foreach ( $attachments as $attachment_id ) {
                        $attachment = wp_get_attachment_image( $attachment_id, 'thumbnail' );

                        // if attachment is empty skip.
                        if ( empty( $attachment ) ) {
                            $update_meta = true;
                            continue;
                        }
                        ?>
                        <li class="image" data-attachment_id="<?php echo esc_attr( $attachment_id ); ?>">
                            <?php echo $attachment; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped ?>
                            <ul class="actions">
                                <li><a href="#" class="delete tips" data-tip="<?php esc_attr_e( 'Delete image', 'woocommerce' ); ?>"><?php esc_html_e( 'Delete', 'woocommerce' ); ?></a></li>
                            </ul>
                            <?php
                            // Allow for extra info to be exposed or extra action to be executed for this attachment.
                            do_action( 'woocommerce_admin_after_product_gallery_item', $thepostid, $attachment_id );
                            ?>
                        </li>
                        <?php

                        // rebuild ids to be saved.
                        $updated_gallery_ids[] = $attachment_id;
                    }

                    // need to update product meta to set new gallery ids
                    if ( $update_meta ) {
                        update_post_meta( $post->ID, '_product_image_gallery', implode( ',', $updated_gallery_ids ) );
                    }
                }
                ?>
            </ul>

            <input type="hidden" id="product_image_gallery" name="product_image_gallery" value="<?php echo esc_attr( implode( ',', $updated_gallery_ids ) ); ?>" />

        </div>
        <p class="add_product_images hide-if-no-js">
            <a href="#" data-choose="<?php esc_attr_e( 'Add images to product gallery', 'woocommerce' ); ?>" data-update="<?php esc_attr_e( 'Add to gallery', 'woocommerce' ); ?>" data-delete="<?php esc_attr_e( 'Delete image', 'woocommerce' ); ?>" data-text="<?php esc_attr_e( 'Delete', 'woocommerce' ); ?>"><?php esc_html_e( 'Add product gallery images', 'woocommerce' ); ?></a>
        </p>
        <?php
    }

    /**
     * Save meta box data.
     *
     * @param int     $post_id
     * @param WP_Post $post
     */
    public static function save( $post_id, $post ) {
        $product_type   = empty( $_POST['product-type'] ) ? WC_Product_Factory::get_product_type( $post_id ) : sanitize_title( stripslashes( $_POST['product-type'] ) );
        $classname      = WC_Product_Factory::get_product_classname( $post_id, $product_type ? $product_type : 'simple' );
        $product        = new $classname( $post_id );
        $attachment_ids = isset( $_POST['product_image_gallery'] ) ? array_filter( explode( ',', wc_clean( $_POST['product_image_gallery'] ) ) ) : array();

        $product->set_gallery_image_ids( $attachment_ids );
        $product->save();
    }
}