hissy · October 9, 2024 00:33 · overclokk · Dec 30, 2016 · renegithub · Jan 30, 2017
diff --git a/nav-menu-exporter-importer.php b/nav-menu-exporter-importer.php
 <?php
 /*
 Plugin Name: Nav Menu Exporter and Importer
 Description: Export and Import nav menus. Requires WordPress Importer plugin
 Author: hissy, megumi themes
 Version: 0.1
 Text Domain: nav-menu-exporter-importer
 License: GPL version 2 or later - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 */


 /**
 * Exporter
 */
 function add_mav_menu_to_export() {
 	$post_type = get_post_type_object('nav_menu_item');
 	?>
 	<p><label><input type="radio" name="content" value="<?php echo esc_attr( $post_type->name ); ?>" /> <?php echo esc_html( $post_type->label ); ?></label></p>
 	<?php
 }
 add_action('export_filters','add_mav_menu_to_export');


 /**
 * Importer
 */
 if ( ! defined( 'WP_LOAD_IMPORTERS' ) )
 	return;

 // Load Importer API
 require_once ABSPATH . 'wp-admin/includes/import.php';

 if ( ! class_exists( 'WP_Importer' ) ) {
 	$class_wp_importer = ABSPATH . 'wp-admin/includes/class-wp-importer.php';
 	if ( file_exists( $class_wp_importer ) )
 		require $class_wp_importer;
 }

 // include WXR file parsers
 $wordpress_importer = ABSPATH . 'wp-content/plugins/wordpress-importer/wordpress-importer.php';
 if ( file_exists( $wordpress_importer ) )
 	require_once $wordpress_importer;

 /**
 * Nav Menu Importer class
 */
 if ( class_exists( 'WP_Import' ) ) {
 class Nav_Menu_Importer extends WP_Import {

 	function dispatch() {
 		$this->header();

 		$step = empty( $_GET['step'] ) ? 0 : (int) $_GET['step'];
 		switch ( $step ) {
 			case 0:
 				$this->greet();
 				break;
 			case 1:
 				check_admin_referer( 'import-upload' );
 				if ( $this->handle_upload() ) {
 					$file = get_attached_file( $this->id );
 					set_time_limit(0);
 					$this->import( $file );
 				}
 				break;
 		}

 		$this->footer();
 	}
 	
 	function greet() {
 		wp_import_upload_form( add_query_arg('step', 1) );
 	}
 	
 	function import_end() {
 		wp_import_cleanup( $this->id );

 		wp_cache_flush();

 		echo '<p>' . __( 'All done.', 'wordpress-importer' ) . ' <a href="' . admin_url() . '">' . __( 'Have fun!', 'wordpress-importer' ) . '</a>' . '</p>';
 	}
 	
 	function import( $file ) {
 		$this->import_start( $file );

 		wp_suspend_cache_invalidation( true );
 		// only processing nav menus
 		$this->process_menus();
 		wp_suspend_cache_invalidation( false );

 		$this->import_end();
 	}
 	
 	function process_menus() {
 		$count = 0;
 		
 		foreach ( $this->posts as $item ) {
 			$count++;

 			// check the item is public nav item
 			if ( 'nav_menu_item' == $item['post_type'] && 'draft' != $item['status'] ) {
 				
 				$menu_slug = false;
 				if ( isset($item['terms']) ) {
 					// loop through terms, assume first nav_menu term is correct menu
 					foreach ( $item['terms'] as $term ) {
 						if ( 'nav_menu' == $term['domain'] ) {
 							$menu_slug = $term['slug'];
 							break;
 						}
 					}
 				}

 				// no nav_menu term associated with this menu item
 				if ( ! $menu_slug ) {
 					_e( 'Menu item skipped due to missing menu slug', 'wordpress-importer' );
 					echo '<br>';
 					continue;
 				}
 		
 				$menu_id = term_exists( $menu_slug, 'nav_menu' );
 				if ( ! $menu_id ) {
 					printf( __( 'Menu item skipped due to invalid menu slug: %s', 'wordpress-importer' ), esc_html( $menu_slug ) );
 					echo '<br>';
 					continue;
 				} else {
 					$menu_id = is_array( $menu_id ) ? $menu_id['term_id'] : $menu_id;
 				}
 				
 				// set postmeta
 				foreach ( $item['postmeta'] as $meta )
 					$$meta['key'] = $meta['value'];
 				
 				// skip nav item when menu item object is not exists
 				switch ($_menu_item_type) {
 					case 'taxonomy':
 						$_menu_item_object_id = get_term($_menu_item_object_id,$_menu_item_object);
 						if ($_menu_item_object_id == null || is_wp_error($_menu_item_object_id)) {
 							printf( __( 'Menu item skipped due to %s is not exists', 'nav-menu-exporter-importer' ), esc_html( $_menu_item_object ) );
 							echo '<br>';
 						}
 						break;
 					case 'post_type':
 						$_menu_item_object_id = get_post($_menu_item_object_id);
 						if ($_menu_item_object_id instanceof WP_Post) {
 							$_menu_item_object_id = $_menu_item_object_id->ID;
 							unset($_post);
 						} else {
 							printf( __( 'Menu item skipped due to %s is not exists', 'nav-menu-exporter-importer' ), esc_html( $_menu_item_object ) );
 							echo '<br>';
 						}
 						break;
 				}
 				
 				if ($_menu_item_object_id == null || is_wp_error($_menu_item_object_id))
 					continue;
 				
 				// wp_update_nav_menu_item expects CSS classes as a space separated string
 				$_menu_item_classes = maybe_unserialize( $_menu_item_classes );
 				if ( is_array( $_menu_item_classes ) )
 					$_menu_item_classes = implode( ' ', $_menu_item_classes );

 				$args = array(
 					'menu-item-object-id' => $_menu_item_object_id,
 					'menu-item-object' => $_menu_item_object,
 					'menu-item-parent-id' => $_menu_item_menu_item_parent,
 					'menu-item-position' => intval( $item['menu_order'] ),
 					'menu-item-type' => $_menu_item_type,
 					'menu-item-title' => $item['post_title'],
 					'menu-item-url' => $_menu_item_url,
 					'menu-item-description' => $item['post_content'],
 					'menu-item-attr-title' => $item['post_excerpt'],
 					'menu-item-target' => $_menu_item_target,
 					'menu-item-classes' => $_menu_item_classes,
 					'menu-item-xfn' => $_menu_item_xfn,
 					'menu-item-status' => $item['status']
 				);
 		
 				$r = wp_update_nav_menu_item( $menu_id, 0, $args );
 				
 				if ( $r && is_wp_error( $r ) ) {
 					echo $r->get_error_message();
 					echo '<br>';
 				} else {
 					echo '.';
 				}
 				
 			}
 			
 		}
 		
 		echo '<br>';
 		printf( __( '%s items processed.', 'nav-menu-exporter-importer' ), esc_html( $count ) );
 	}

 }

 // setup importer
 $nav_menu_importer = new Nav_Menu_Importer();

 register_importer('nav_menu', __('Nav Menu', 'nav-menu-exporter-importer'), __('Export and Import nav menus. Requires WordPress Importer plugin', 'nav-menu-exporter-importer'), array ($nav_menu_importer, 'dispatch'));

 } // class_exists( 'WP_Import' )
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