UpdateSelectionCommand.php

<?php

namespace Drupal\media_library\Ajax;

use Drupal\Core\Ajax\CommandInterface;

/**
 * AJAX command for adding media items to the media library selection.
 *
 * This command instructs the client to add the given media item IDs to the
 * current selection of the media library stored in
 * Drupal.MediaLibrary.currentSelection.
 *
 * This command is implemented by
 * Drupal.AjaxCommands.prototype.updateMediaLibrarySelection() defined in
 * media_library.ui.js.
 *
 * @ingroup ajax
 *
 * @internal
 *   This is an internal part of Media Library and may be subject to change in
 *   minor releases. External code should not instantiate or extend this class.
 */
class UpdateSelectionCommand implements CommandInterface {
    
    /**
     * An array of media IDs to add to the current selection.
     *
     * @var int[]
     */
    protected $mediaIds;
    
    /**
     * Constructs an UpdateSelectionCommand object.
     *
     * @param int[] $media_ids
     *   An array of media IDs to add to the current selection.
     */
    public function __construct(array $media_ids) {
        $this->mediaIds = $media_ids;
    }
    
    /**
     * {@inheritdoc}
     */
    public function render() {
        return [
            'command' => 'updateMediaLibrarySelection',
            'mediaIds' => $this->mediaIds,
        ];
    }

}