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<?php
/*
 * FooGallery Admin Demo Content class
 */

if ( ! class_exists( 'FooGallery_Admin_Demo_Content' ) ) {

	class FooGallery_Admin_Demo_Content {

		/**
		 * Import attachments and galleries
		 *
		 * @return int[]
		 */
		function import_demo_content() {
			//import all the images first, so that we can get attachment ID's
			$image_data = include( FOOGALLERY_PATH . 'includes/admin/demo-content-images.php' );

			$images_imported     = 0;
			$attachment_mappings = array();

			foreach ( $image_data as $attachment_data ) {
				$result = $this->import_attachment( $attachment_data );
				if ( $result !== false ) {
					if ( $result['imported'] ) {
						$images_imported++;
					}
					$attachment_mappings[ $result['key'] ] = intval( $result['attachment_id'] );
				}
			}

			$gallery_data = include( FOOGALLERY_PATH . 'includes/admin/demo-content-galleries.php' );

			$galleries_imported = 0;

			foreach ( $gallery_data as $post_data ) {
				//create the post
				$result = $this->import_gallery( $post_data, $attachment_mappings );
				if ( $result !== false ) {
					if ( $result['imported'] ) {
						$galleries_imported++;
					}
				}
			}

			return array(
				'attachments' => $images_imported,
				'galleries' => $galleries_imported
			);
		}

		function import_gallery( $gallery_data, $attachment_mappings ) {
			$imported_galleries = get_option( FOOGALLERY_OPTION_DEMO_CONTENT_GALLERIES, array() );

			$key = $gallery_data['key'];

			//check to see if the gallery has already been imported
			if ( array_key_exists( $key, $imported_galleries ) ) {
				$gallery_id = $imported_galleries[ $key ];
				//check that the gallery actually exists
				if ( get_post_status ( $gallery_id ) ) {
					return array(
						'id'       => $gallery_id,
						'imported' => false
					);
				}
			}

			$items = $gallery_data['items'];
			unset( $gallery_data['items'] );
			unset( $gallery_data['key'] );

			$gallery_id = wp_insert_post( $gallery_data, true );
			$imported = true;

			if ( !is_wp_error( $gallery_id ) ) {

				if ( $imported ) {
					//save the gallery to options so we can delete easily it later
					$imported_galleries                = get_option( FOOGALLERY_OPTION_DEMO_CONTENT_GALLERIES, array() );
					$imported_galleries[ $key ] = $gallery_id;
					update_option( FOOGALLERY_OPTION_DEMO_CONTENT_GALLERIES, $imported_galleries );
				}

				$attachments = array();

				//get the attachment ID's and set the attachment metadata
				foreach ( $items as $item ) {
					if ( array_key_exists( $item, $attachment_mappings ) ) {
						$attachments[] = $attachment_mappings[ $item ];
					}
				}

				update_post_meta( $gallery_id, FOOGALLERY_META_ATTACHMENTS, $attachments );

				return array(
					'id' => $gallery_id,
					'imported' => $imported
				);
			}

			return false;
		}

		/**
		 * Import an attachment into the media library
		 *
		 * @param $attachment_data
		 *
		 * @return array|bool
		 */
		function import_attachment( $attachment_data ) {

			$imported_attachments = get_option( FOOGALLERY_OPTION_DEMO_CONTENT_ATTACHMENTS, array() );

			//check to see if the image has already been imported
			if ( array_key_exists( $attachment_data['key'], $imported_attachments ) ) {
				$attachment_id = $imported_attachments[ $attachment_data['key'] ];
				//check that the attachment actually exists
				if ( get_post_status ( $attachment_id ) ) {
					return array(
						'key'           => $attachment_data['key'],
						'attachment_id' => $attachment_id,
						'imported'      => false
					);
				}
			}

			$attachment_id = foogallery_import_attachment( $attachment_data );

			if ( ! is_wp_error( $attachment_id ) && intval( $attachment_id ) > 0 ) {

				$imported_attachments[ $attachment_data['key'] ] = $attachment_id;

				update_option( FOOGALLERY_OPTION_DEMO_CONTENT_ATTACHMENTS, $imported_attachments );

				return array(
					'key'           => $attachment_data['key'],
					'attachment_id' => $attachment_id,
					'imported'      => true,
				);
			}

			return array(
				'key'           => $attachment_data['key'],
				'attachment_id' => false,
				'imported'      => false,
			);
		}
	}
}