add_shortcode( 'sort_by' , 'mars_orderblock_videos' );

if( ! function_exists( 'videotube_prefilter_main_video_args' ) ){
    /**
     *
     *
     * Filter the main video args
     *
     * @param array $args
     * @param string $id
     *
     *
     */
    function videotube_prefilter_main_video_args( $args, $id = '' ) {
        if( isset( $_GET['order_post'] ) && in_array( $_GET['order_post'] , array( 'latest', 'liked', 'viewed', 'comments' )) ){
            switch ( $_GET['order_post'] ) {
                case 'liked':
                case 'viewed':
                    $args['orderby'] = 'meta_value_num';
                    if( $_GET['order_post'] == 'liked' ){
                        $args['meta_key'] = 'like_key';
                    }
                    else{
                        $args['meta_key'] = 'count_viewed';
                    }
                break;

                case 'comments':
                    $args['orderby'] = 'comment_count';
                break;

                case 'latest':
                    $args['orderby'] = 'date';
                break;
            }
        }
        return $args;
    }
    add_filter( 'mars_sc_videotube_args' , 'videotube_prefilter_main_video_args', 10, 2 );
}