<?php

// Prevent loading this file directly

defined( 'ABSPATH' ) || exit;



if ( ! class_exists( 'RWMB_Image_Field' ) )

{

	class RWMB_Image_Field extends RWMB_File_Field

	{

		/**

		 * Enqueue scripts and styles

		 *

		 * @return void

		 */

		static function admin_enqueue_scripts()

		{

			// Enqueue same scripts and styles as for file field

			parent::admin_enqueue_scripts();



			wp_enqueue_style( 'rwmb-image', RWMB_CSS_URL . 'image.css', array(), RWMB_VER );

			wp_enqueue_script( 'rwmb-image', RWMB_JS_URL . 'image.js', array( 'jquery-ui-sortable' ), RWMB_VER, true );

		}



		/**

		 * Add actions

		 *

		 * @return void

		 */

		static function add_actions()

		{

			// Do same actions as file field

			parent::add_actions();



			// Reorder images via Ajax

			add_action( 'wp_ajax_rwmb_reorder_images', array( __CLASS__, 'wp_ajax_reorder_images' ) );

		}



		/**

		 * Ajax callback for reordering images

		 *

		 * @return void

		 */

		static function wp_ajax_reorder_images()

		{

			$field_id = isset( $_POST['field_id'] ) ? $_POST['field_id'] : 0;

			$order    = isset( $_POST['order'] ) ? $_POST['order'] : 0;

			$post_id  = isset( $_POST['post_id'] ) ? (int) $_POST['post_id'] : 0;



			check_ajax_referer( "rwmb-reorder-images_{$field_id}" );



			parse_str( $order, $items );



			delete_post_meta( $post_id, $field_id );

			foreach ( $items['item'] as $item )

			{

				add_post_meta( $post_id, $field_id, $item, false );

			}

			wp_send_json_success();

		}



		/**

		 * Get field HTML

		 *

		 * @param mixed  $meta

		 * @param array  $field

		 *

		 * @return string

		 */

		static function html( $meta, $field )

		{

			$i18n_title = apply_filters( 'rwmb_image_upload_string', _x( 'Upload Images', 'image upload', 'harvest' ), $field );

			$i18n_more  = apply_filters( 'rwmb_image_add_string', _x( '+ Add new image', 'image upload', 'harvest' ), $field );



			// Uploaded images

			$html = self::get_uploaded_images( $meta, $field );



			// Show form upload

			$html .= sprintf(

				'<h4>%s</h4>

				<div class="new-files">

					<div class="file-input"><input type="file" name="%s[]" /></div>

					<a class="rwmb-add-file" href="#"><strong>%s</strong></a>

				</div>',

				$i18n_title,

				$field['id'],

				$i18n_more

			);



			return $html;

		}



		/**

		 * Get HTML markup for uploaded images

		 *

		 * @param array $images

		 * @param array $field

		 *

		 * @return string

		 */

		static function get_uploaded_images( $images, $field )

		{

			$reorder_nonce = wp_create_nonce( "rwmb-reorder-images_{$field['id']}" );

			$delete_nonce = wp_create_nonce( "rwmb-delete-file_{$field['id']}" );

			$classes = array( 'rwmb-images', 'rwmb-uploaded' );

			if ( count( $images ) <= 0  )

				$classes[] = 'hidden';

			$ul = '<ul class="%s" data-field_id="%s" data-delete_nonce="%s" data-reorder_nonce="%s" data-force_delete="%s" data-max_file_uploads="%s">';

			$html = sprintf(

				$ul,

				implode( ' ', $classes ),

				$field['id'],

				$delete_nonce,

				$reorder_nonce,

				$field['force_delete'] ? 1 : 0,

				$field['max_file_uploads']

			);



			foreach ( $images as $image )

			{

				$html .= self::img_html( $image );

			}



			$html .= '</ul>';



			return $html;

		}



		/**

		 * Get HTML markup for ONE uploaded image

		 *

		 * @param int $image Image ID

		 *

		 * @return string

		 */

		static function img_html( $image )

		{

			$i18n_delete = apply_filters( 'rwmb_image_delete_string', _x( 'Delete', 'image upload', 'harvest' ) );

			$i18n_edit   = apply_filters( 'rwmb_image_edit_string', _x( 'Edit', 'image upload', 'harvest' ) );

			$li = '

				<li id="item_%s">

					<img src="%s" />

					<div class="rwmb-image-bar">

						<a title="%s" class="rwmb-edit-file" href="%s" target="_blank">%s</a> |

						<a title="%s" class="rwmb-delete-file" href="#" data-attachment_id="%s">&#42</a>

					</div>

				</li>

			';



			$src  = wp_get_attachment_image_src( $image, 'thumbnail' );

			$src  = $src[0];

			$link = get_edit_post_link( $image );



			return sprintf(

				$li,

				$image,

				$src,

				$i18n_edit, $link, $i18n_edit,

				$i18n_delete, $image

			);

		}



		/**

		 * Standard meta retrieval

		 *

		 * @param int   $post_id

		 * @param array $field

		 * @param bool  $saved

		 *

		 * @return mixed

		 */

		static function meta( $post_id, $saved, $field )

		{

			global $wpdb;



			$meta = $wpdb->get_col( $wpdb->prepare( "

				SELECT meta_value FROM $wpdb->postmeta

				WHERE post_id = %d AND meta_key = '%s'

				ORDER BY meta_id ASC

			", $post_id, $field['id'] ) );



			return empty( $meta ) ? array() : $meta;

		}

	}

}

