<?php

class Graphthemes_Widget_Functions {

    public function __construct() {
      add_action( 'admin_enqueue_scripts', array( $this, 'enqueue_admin_scripts' ) );
    }

    public function enqueue_admin_scripts() {
        wp_enqueue_media();
        wp_enqueue_script( 'graphthemes-widgets-admin-scripts', get_template_directory_uri() . '/inc/graphthemes-widgets/includes/js/graphthemes-widgets-admin.js', array( 'jquery' ), ZEITFRESSER_VERSION , true );
    }

    public function zeitfresser_widget_get_attachment_id( $url ) {
        $attachment_id = 0;
        $dir = wp_upload_dir();
        if ( false !== strpos( $url, $dir['baseurl'] . '/' ) ) { // Is URL in uploads directory?
            $file = basename( $url );
            $query_args = array(
                'post_type'   => 'attachment',
                'post_status' => 'inherit',
                'fields'      => 'ids',
                'meta_query'  => array(
                    array(
                        'value'   => $file,
                        'compare' => 'LIKE',
                        'key'     => '_wp_attachment_metadata',
                    ),
                )
            );
            $query = new WP_Query( $query_args );
            if ( $query->have_posts() ) {
                foreach ( $query->posts as $post_id ) {
                    $meta = wp_get_attachment_metadata( $post_id );
                    $original_file       = basename( $meta['file'] );
                    $cropped_image_files = wp_list_pluck( $meta['sizes'], 'file' );
                    if ( $original_file === $file || in_array( $file, $cropped_image_files ) ) {
                        $attachment_id = $post_id;
                        break;
                    }
                }
            }
        }
        return $attachment_id;
    }


}   
$obj = new Graphthemes_Widget_Functions;