芝麻web文件管理V1.00

编辑当前文件:/home/felaukpo/public_html/wp-content/plugins/vamtam-importers-e/importers/importer/importer.php

<?php
/**
 * VamTam Content Importer
 */

if ( ! defined( 'WP_LOAD_IMPORTERS' ) )
	return;

/** Display verbose errors */
if ( ! defined( 'IMPORT_DEBUG' ) ) {
	define( 'IMPORT_DEBUG', false );
}

// 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
require dirname( __FILE__ ) . '/parsers.php';

/**
 * WordPress Importer class for managing the import process of a WXR file
 *
 * @package Importer
 */
if ( class_exists( 'WP_Importer' ) ) {
class Vamtam_Import extends WP_Importer {
	var $max_wxr_version = 1.1; // max. supported WXR version

var $id; // WXR attachment ID

// information to import from WXR file
	var $version;
	var $authors = array();
	var $posts = array();
	var $terms = array();
	var $categories = array();
	var $tags = array();
	var $base_url = '';
	var $front_page = 0;
	var $woocommerce_pages = 0;

private $attachments = [];

// mappings from old information to new
	var $processed_authors = array();
	var $author_mapping = array();
	var $processed_terms = array();
	var $processed_posts = array();
	var $processed_attachments = array();
	var $post_orphans = array();
	var $processed_menu_items = array();
	var $menu_item_orphans = array();
	var $missing_menu_items = array();

var $fetch_attachments = false;
	var $url_remap = array();
	var $featured_images = array();

function __construct() {
	/* nothing */ }

/**
	 * Registered callback function for the WordPress Importer
	 *
	 * Manages the three separate stages of the WXR import process
	 */
	function dispatch() {
		$this->header();

$step = empty( $_GET['step'] ) ? 0 : $_GET['step'];

check_admin_referer( 'vamtam-import' );
		$file = VAMTAM_SAMPLES_DIR . 'content.xml';

$this->fetch_attachments = ( $this->allow_fetch_attachments() );
		$this->one_click = true;

update_option( 'vamtam-used-one-click-import', true );

set_time_limit( 0 );

$this->import( $file );

$this->footer();
	}

/**
	 * The main controller for the actual import stage.
	 *
	 * @param string $file Path to the WXR file for importing
	 */
	function import( $file ) {
		global $vamtam_defaults;

add_filter( 'import_post_meta_key', array( $this, 'is_valid_meta_key' ) );
		add_filter( 'http_request_timeout', array( $this, 'bump_request_timeout' ) );

do_action( 'vamtam_before_content_import' );

$start = microtime( true );

$this->import_start( $file );

$this->get_author_mapping();

wp_suspend_cache_invalidation( true );
		$this->process_categories();
		$this->process_tags();
		$this->process_terms();
		$this->process_posts();
		wp_suspend_cache_invalidation( false );

if ( get_option( 'vamtam_theme', false ) === false && is_array( $vamtam_defaults ) ) {
			update_option( 'vamtam_theme', $vamtam_defaults );
		}

// update incorrect/missing information in the DB
		$this->backfill_parents();

$this->import_end();

$end = microtime( true );

echo 'Parse and Import: ' . ( $end - $start ) . "s\n";

do_action( 'vamtam_after_content_import' );
	}

/**
	 * Parses the WXR file and prepares us for the task of processing parsed data
	 *
	 * @param string $file Path to the WXR file for importing
	 */
	function import_start( $file ) {
		if ( ! is_file( $file ) ) {
			echo '<p><strong>' . esc_html__( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
			echo esc_html__( 'The file does not exist, please try again.', 'wordpress-importer' ) . '</p>';
			$this->footer();
			die();
		}

$import_data = $this->parse( $file );

if ( is_wp_error( $import_data ) ) {
			echo '<p><strong>' . esc_html__( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
			echo esc_html( $import_data->get_error_message() ) . '</p>';
			$this->footer();
			die();
		}

$this->version = $import_data['version'];
		$this->get_authors_from_import( $import_data );
		$this->posts = $import_data['posts'];
		$this->terms = $import_data['terms'];
		$this->categories = $import_data['categories'];
		$this->tags = $import_data['tags'];
		$this->base_url = esc_url( $import_data['base_url'] );

if ( isset( $import_data['frontpage'] ) ) {
			$this->front_page = $import_data['frontpage'];
		}

if ( isset( $import_data['woocommerce_pages'] ) ) {
			$this->woocommerce_pages = $import_data['woocommerce_pages'];
		}

wp_defer_term_counting( true );
		wp_defer_comment_counting( true );

do_action( 'import_start' );
	}

/**
	 * Performs post-import cleanup of files and the cache
	 */
	function import_end() {
		wp_import_cleanup( $this->id );

wp_cache_flush();
		foreach ( get_taxonomies() as $tax ) {
			delete_option( "{$tax}_children" );
			_get_term_hierarchy( $tax );
		}

wp_defer_term_counting( false );
		wp_defer_comment_counting( false );

echo '<p>' . esc_html__( 'All done.', 'wordpress-importer' ) . ' <a href="' . esc_url( admin_url() ) . '">' . esc_html__( 'Have fun!', 'wordpress-importer' ) . '</a></p>';

echo '<p>' . esc_html__( 'Remember to update the passwords and roles of imported users.', 'wordpress-importer' ) . '</p>';

if ( $this->one_click ) {
			if ( $this->front_page ) {
				update_option( 'page_on_front', $this->processed_posts[ intval( $this->front_page ) ] );
				update_option( 'show_on_front', 'page' );
			}

if ( $this->woocommerce_pages ) {
				$wc_pages = json_decode( $this->woocommerce_pages );

foreach ( $wc_pages as $option => $pageid ) {
					if ( isset( $this->processed_posts[ intval( $pageid ) ] ) ) {
						update_option( $option, $this->processed_posts[ intval( $pageid ) ] );
					}
				}
			}

update_option( 'vamtam_last_import_map', array(
				'posts'           => $this->processed_posts,
				'terms'           => $this->processed_terms,
				'authors'         => $this->processed_authors,
				'featured_images' => $this->featured_images,
				'menus'           => $this->processed_menu_items,
			) );

update_option( 'vamtam_import_attachments_todo', [
				'base_url'    => $this->base_url,
				'attachments' => $this->attachments,
			] );
		}

if ( vamtam_has_woocommerce() ) {
			self::wc_import_status_actions();
		}

do_action( 'import_end' );
	}

/**
	 * Handles the WXR upload and initial parsing of the file to prepare for
	 * displaying author import options
	 *
	 * @return bool False if error uploading or invalid file, true otherwise
	 */
	function handle_upload() {
		$file = wp_import_handle_upload();

if ( isset( $file['error'] ) ) {
			echo '<p><strong>' . esc_html__( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
			echo esc_html( $file['error'] ) . '</p>';
			return false;
		}

$this->id = (int) $file['id'];
		$import_data = $this->parse( $file['file'] );
		if ( is_wp_error( $import_data ) ) {
			echo '<p><strong>' . esc_html__( 'Sorry, there has been an error.', 'wordpress-importer' ) . '</strong><br />';
			echo esc_html( $import_data->get_error_message() ) . '</p>';
			return false;
		}

$this->version = $import_data['version'];
		if ( $this->version > $this->max_wxr_version ) {
			echo '<div class="error"><p><strong>';
			printf( esc_html__( 'This WXR file (version %s) may not be supported by this version of the importer. Please consider updating.', 'wordpress-importer' ), esc_html( $import_data['version'] ) );
			echo '</strong></p></div>';
		}

$this->get_authors_from_import( $import_data );

return true;
	}

/**
	 * Retrieve authors from parsed WXR data
	 *
	 * Uses the provided author information from WXR 1.1 files
	 * or extracts info from each post for WXR 1.0 files
	 *
	 * @param array $import_data Data returned by a WXR parser
	 */
	function get_authors_from_import( $import_data ) {
		if ( ! empty( $import_data['authors'] ) ) {
			$this->authors = $import_data['authors'];
		// no author information, grab it from the posts
		} else {
			foreach ( $import_data['posts'] as $post ) {
				$login = sanitize_user( $post['post_author'], true );
				if ( empty( $login ) ) {
					printf( esc_html__( 'Failed to import author %s. Their posts will be attributed to the current user.', 'wordpress-importer' ), esc_html( $post['post_author'] ) ); echo '<br />';
					continue;
				}

if ( ! isset( $this->authors[ $login ] ) )
					$this->authors[ $login ] = array(
						'author_login' => $login,
						'author_display_name' => $post['post_author'],
					);
			}
		}
	}

/**
	 * Map old author logins to local user IDs based on decisions made
	 * in import options form. Can map to an existing user, create a new user
	 * or falls back to the current user in case of error with either of the previous
	 */
	function get_author_mapping() {
		if ( ! isset( $_POST['imported_authors'] ) )
			return;

$create_users = $this->allow_create_users();

foreach ( (array) $_POST['imported_authors'] as $i => $old_login ) {
			$old_id = isset( $this->authors[ $old_login ]['author_id'] ) ? intval( $this->authors[ $old_login ]['author_id'] ) : false;

if ( ! empty( $_POST['user_map'][ $i ] ) ) {
				$user = get_userdata( intval( $_POST['user_map'][ $i ] ) );
				if ( isset( $user->ID ) ) {
					if ( $old_id )
						$this->processed_authors[ $old_id ] = $user->ID;
					$this->author_mapping[ $old_login ] = $user->ID;
				}
			} else if ( $create_users ) {
				if ( ! empty( $_POST['user_new'][ $i ] ) ) {
					$user_id = wp_create_user( $_POST['user_new'][ $i ], wp_generate_password() );
				} else if ( $this->version != '1.0' ) {
					$user_data = array(
						'user_login' => $old_login,
						'user_pass' => wp_generate_password(),
						'user_email' => isset( $this->authors[ $old_login ]['author_email'] ) ? $this->authors[ $old_login ]['author_email'] : '',
						'display_name' => $this->authors[ $old_login ]['author_display_name'],
						'first_name' => isset( $this->authors[ $old_login ]['author_first_name'] ) ? $this->authors[ $old_login ]['author_first_name'] : '',
						'last_name' => isset( $this->authors[ $old_login ]['author_last_name'] ) ? $this->authors[ $old_login ]['author_last_name'] : '',
					);
					$user_id = wp_insert_user( $user_data );
				}

if ( ! is_wp_error( $user_id ) ) {
					if ( $old_id )
						$this->processed_authors[ $old_id ] = $user_id;
					$this->author_mapping[ $old_login ] = $user_id;
				} else {
					printf( esc_html__( 'Failed to create new user for %s. Their posts will be attributed to the current user.', 'wordpress-importer' ), esc_html( $this->authors[ $old_login ]['author_display_name'] ) );
					if ( defined( 'IMPORT_DEBUG' ) && IMPORT_DEBUG ) {
						echo ' ' . $user_id->get_error_message(); // xss ok
					}
					echo '<br />';
				}
			}

// failsafe: if the user_id was invalid, default to the current user
			if ( ! isset( $this->author_mapping[ $old_login ] ) ) {
				if ( $old_id )
					$this->processed_authors[ $old_id ] = (int) get_current_user_id();
				$this->author_mapping[ $old_login ] = (int) get_current_user_id();
			}
		}
	}

/**
	 * Create new categories based on import information
	 *
	 * Doesn't create a new category if its slug already exists
	 */
	function process_categories() {
		$this->categories = apply_filters( 'wp_import_categories', $this->categories );

if ( empty( $this->categories ) )
			return;

foreach ( $this->categories as $cat ) {
			// if the category already exists leave it alone
			$term_id = term_exists( $cat['category_nicename'], 'category' );
			if ( $term_id ) {
				if ( is_array($term_id) ) $term_id = $term_id['term_id'];
				if ( isset($cat['term_id']) )
					$this->processed_terms[intval($cat['term_id'])] = (int) $term_id;
				continue;
			}

$category_parent = empty( $cat['category_parent'] ) ? 0 : category_exists( $cat['category_parent'] );
			$category_description = isset( $cat['category_description'] ) ? $cat['category_description'] : '';
			$catarr = array(
				'category_nicename' => $cat['category_nicename'],
				'category_parent' => $category_parent,
				'cat_name' => $cat['cat_name'],
				'category_description' => $category_description
			);
			$catarr = wp_slash( $catarr );

$id = wp_insert_category( $catarr );
			if ( ! is_wp_error( $id ) ) {
				if ( isset($cat['term_id']) )
					$this->processed_terms[intval($cat['term_id'])] = $id;
			} else {
				printf( __( 'Failed to import category %s', 'wordpress-importer' ), esc_html($cat['category_nicename']) );
				if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
					echo ': ' . $id->get_error_message();
				echo '<br />';
				continue;
			}

$this->process_termmeta( $cat, $id );
		}

unset( $this->categories );
	}

/**
	 * Create new post tags based on import information
	 *
	 * Doesn't create a tag if its slug already exists
	 */
	function process_tags() {
		$this->tags = apply_filters( 'wp_import_tags', $this->tags );

if ( empty( $this->tags ) )
			return;

foreach ( $this->tags as $tag ) {
			// if the tag already exists leave it alone
			$term_id = term_exists( $tag['tag_slug'], 'post_tag' );
			if ( $term_id ) {
				if ( is_array($term_id) ) $term_id = $term_id['term_id'];
				if ( isset($tag['term_id']) )
					$this->processed_terms[intval($tag['term_id'])] = (int) $term_id;
				continue;
			}

$tag = wp_slash( $tag );
			$tag_desc = isset( $tag['tag_description'] ) ? $tag['tag_description'] : '';
			$tagarr = array( 'slug' => $tag['tag_slug'], 'description' => $tag_desc );

$id = wp_insert_term( $tag['tag_name'], 'post_tag', $tagarr );
			if ( ! is_wp_error( $id ) ) {
				if ( isset($tag['term_id']) )
					$this->processed_terms[intval($tag['term_id'])] = $id['term_id'];
			} else {
				printf( __( 'Failed to import post tag %s', 'wordpress-importer' ), esc_html($tag['tag_name']) );
				if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
					echo ': ' . $id->get_error_message();
				echo '<br />';
				continue;
			}

$this->process_termmeta( $tag, $id['term_id'] );
		}

unset( $this->tags );
	}

/**
	 * Create new terms based on import information
	 *
	 * Doesn't create a term its slug already exists
	 */
	function process_terms() {
		$this->terms = apply_filters( 'wp_import_terms', $this->terms );

if ( empty( $this->terms ) )
			return;

foreach ( $this->terms as $term ) {
			// if the term already exists in the correct taxonomy leave it alone
			$term_id = term_exists( $term['slug'], $term['term_taxonomy'] );
			if ( $term_id ) {
				if ( is_array($term_id) ) $term_id = $term_id['term_id'];
				if ( isset($term['term_id']) )
					$this->processed_terms[intval($term['term_id'])] = (int) $term_id;
				continue;
			}

if ( empty( $term['term_parent'] ) ) {
				$parent = 0;
			} else {
				$parent = term_exists( $term['term_parent'], $term['term_taxonomy'] );
				if ( is_array( $parent ) ) $parent = $parent['term_id'];
			}
			$term = wp_slash( $term );
			$description = isset( $term['term_description'] ) ? $term['term_description'] : '';
			$termarr = array( 'slug' => $term['slug'], 'description' => $description, 'parent' => intval($parent) );

$id = wp_insert_term( $term['term_name'], $term['term_taxonomy'], $termarr );
			if ( ! is_wp_error( $id ) ) {
				if ( isset($term['term_id']) )
					$this->processed_terms[intval($term['term_id'])] = $id['term_id'];
			} else {
				printf( __( 'Failed to import %s %s', 'wordpress-importer' ), esc_html($term['term_taxonomy']), esc_html($term['term_name']) );
				if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
					echo ': ' . $id->get_error_message();
				echo '<br />';
				continue;
			}

$this->process_termmeta( $term, $id['term_id'] );
		}

unset( $this->terms );
	}

/**
	 * Add metadata to imported term.
	 *
	 * @since 0.6.2
	 *
	 * @param array $term    Term data from WXR import.
	 * @param int   $term_id ID of the newly created term.
	 */
	protected function process_termmeta( $term, $term_id ) {
		if ( ! isset( $term['termmeta'] ) ) {
			$term['termmeta'] = array();
		}

/**
		 * Filters the metadata attached to an imported term.
		 *
		 * @since 0.6.2
		 *
		 * @param array $termmeta Array of term meta.
		 * @param int   $term_id  ID of the newly created term.
		 * @param array $term     Term data from the WXR import.
		 */
		$term['termmeta'] = apply_filters( 'wp_import_term_meta', $term['termmeta'], $term_id, $term );

if ( empty( $term['termmeta'] ) ) {
			return;
		}

foreach ( $term['termmeta'] as $meta ) {
			/**
			 * Filters the meta key for an imported piece of term meta.
			 *
			 * @since 0.6.2
			 *
			 * @param string $meta_key Meta key.
			 * @param int    $term_id  ID of the newly created term.
			 * @param array  $term     Term data from the WXR import.
			 */
			$key = apply_filters( 'import_term_meta_key', $meta['key'], $term_id, $term );
			if ( ! $key ) {
				continue;
			}

// Export gets meta straight from the DB so could have a serialized string
			$value = maybe_unserialize( $meta['value'] );

add_term_meta( $term_id, $key, $value );

/**
			 * Fires after term meta is imported.
			 *
			 * @since 0.6.2
			 *
			 * @param int    $term_id ID of the newly created term.
			 * @param string $key     Meta key.
			 * @param mixed  $value   Meta value.
			 */
			do_action( 'import_term_meta', $term_id, $key, $value );
		}
	}

/**
	 * Create new posts based on import information
	 *
	 * Posts marked as having a parent which doesn't exist will become top level items.
	 * Doesn't create a new post if: the post type doesn't exist, the given post ID
	 * is already noted as imported or a post with the same title and date already exists.
	 * Note that new/updated terms, comments and meta are imported for the last of the above.
	 */
	function process_posts() {
		$this->posts = apply_filters( 'wp_import_posts', $this->posts );

foreach ( $this->posts as $post ) {
			$post = apply_filters( 'wp_import_post_data_raw', $post );

if ( ! post_type_exists( $post['post_type'] ) ) {
				printf( __( 'Failed to import “%s”: Invalid post type %s', 'wordpress-importer' ),
					esc_html($post['post_title']), esc_html($post['post_type']) );
				echo '<br />';
				do_action( 'wp_import_post_exists', $post );
				continue;
			}

if ( isset( $this->processed_posts[$post['post_id']] ) && ! empty( $post['post_id'] ) )
				continue;

if ( $post['status'] == 'auto-draft' )
				continue;

if ( 'nav_menu_item' == $post['post_type'] ) {
				$this->process_menu_item( $post );
				continue;
			}

$post_type_object = get_post_type_object( $post['post_type'] );

$post_exists = post_exists( $post['post_title'], '', $post['post_date'] );

/**
			* Filter ID of the existing post corresponding to post currently importing.
			*
			* Return 0 to force the post to be imported. Filter the ID to be something else
			* to override which existing post is mapped to the imported post.
			*
			* @see post_exists()
			* @since 0.6.2
			*
			* @param int   $post_exists  Post ID, or 0 if post did not exist.
			* @param array $post         The post array to be inserted.
			*/
			$post_exists = apply_filters( 'wp_import_existing_post', $post_exists, $post );

if ( $post_exists && get_post_type( $post_exists ) == $post['post_type'] ) {
				printf( __('%s “%s” already exists.', 'wordpress-importer'), $post_type_object->labels->singular_name, esc_html($post['post_title']) );
				echo '<br />';
				$comment_post_ID = $post_id = $post_exists;
				$this->processed_posts[ intval( $post['post_id'] ) ] = intval( $post_exists );
			} else {
				$post_parent = (int) $post['post_parent'];
				if ( $post_parent ) {
					// if we already know the parent, map it to the new local ID
					if ( isset( $this->processed_posts[$post_parent] ) ) {
						$post_parent = $this->processed_posts[$post_parent];
					// otherwise record the parent for later
					} else {
						$this->post_orphans[intval($post['post_id'])] = $post_parent;
						$post_parent = 0;
					}
				}

// map the post author
				$author = sanitize_user( $post['post_author'], true );
				if ( isset( $this->author_mapping[$author] ) )
					$author = $this->author_mapping[$author];
				else
					$author = (int) get_current_user_id();

$postdata = array(
					'import_id' => $post['post_id'], 'post_author' => $author, 'post_date' => $post['post_date'],
					'post_date_gmt' => $post['post_date_gmt'], 'post_content' => $post['post_content'],
					'post_excerpt' => $post['post_excerpt'], 'post_title' => $post['post_title'],
					'post_status' => $post['status'], 'post_name' => $post['post_name'],
					'comment_status' => $post['comment_status'], 'ping_status' => $post['ping_status'],
					'guid' => $post['guid'], 'post_parent' => $post_parent, 'menu_order' => $post['menu_order'],
					'post_type' => $post['post_type'], 'post_password' => $post['post_password']
				);

$original_post_ID = $post['post_id'];
				$postdata = apply_filters( 'wp_import_post_data_processed', $postdata, $post );

$postdata = wp_slash( $postdata );

if ( 'attachment' == $postdata['post_type'] ) {
					$remote_url = ! empty($post['attachment_url']) ? $post['attachment_url'] : $post['guid'];

// try to use _wp_attached file for upload folder placement to ensure the same location as the export site
					// e.g. location is 2003/05/image.jpg but the attachment post_date is 2010/09, see media_handle_upload()
					$postdata['upload_date'] = $post['post_date'];
					if ( isset( $post['postmeta'] ) ) {
						foreach( $post['postmeta'] as $meta ) {
							if ( $meta['key'] == '_wp_attached_file' ) {
								if ( preg_match( '%^[0-9]{4}/[0-9]{2}%', $meta['value'], $matches ) )
									$postdata['upload_date'] = $matches[0];
								break;
							}
						}
					}

// $comment_post_ID = $post_id = $this->process_attachment( $postdata, $remote_url );

$this->attachments[] = [ $postdata, $remote_url ];
					$this->processed_posts[ intval( $post['post_id'] ) ] = '__TO_BE_IMPORTED__';

printf( __( 'Attachment skipped: %s', 'wpv' ), $remote_url );
					echo '<br>';

continue;
				} else {
					$comment_post_ID = $post_id = wp_insert_post( $postdata, true );
					do_action( 'wp_import_insert_post', $post_id, $original_post_ID, $postdata, $post );
				}

if ( is_wp_error( $post_id ) ) {
					printf( __( 'Failed to import %s “%s”', 'wordpress-importer' ),
						$post_type_object->labels->singular_name, esc_html($post['post_title']) );
					if ( defined('IMPORT_DEBUG') && IMPORT_DEBUG )
						echo ': ' . $post_id->get_error_message();
					echo '<br />';
					continue;
				}

if ( $post['is_sticky'] == 1 ) {
					stick_post( $post_id );
				}
			}

// map pre-import ID to local ID
			$this->processed_posts[intval($post['post_id'])] = (int) $post_id;

Vamtam_Importers_E::process_post_additional_data( $post, $post_id, $post_exists, $this->processed_authors, $this->featured_images );
		}

unset( $this->posts );
	}

/**
	 * Attempt to create a new menu item from import data
	 *
	 * Fails for draft, orphaned menu items and those without an associated nav_menu
	 * or an invalid nav_menu term. If the post type or term object which the menu item
	 * represents doesn't exist then the menu item will not be imported (waits until the
	 * end of the import to retry again before discarding).
	 *
	 * @param array $item Menu item details from WXR file
	 */
	function process_menu_item( $item ) {
		// skip draft, orphaned menu items
		if ( 'draft' == $item['status'] )
			return;

$menu_slug = false;
		if ( isset($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 />';
			return;
		}

$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 />';
			return;
		} else {
			$menu_id = is_array( $menu_id ) ? $menu_id['term_id'] : $menu_id;
		}

foreach ( $item['postmeta'] as $meta ) {
			${$meta['key']} = $meta['value'];
		}

if ( 'taxonomy' == $_menu_item_type && isset( $this->processed_terms[intval($_menu_item_object_id)] ) ) {
			$_menu_item_object_id = $this->processed_terms[intval($_menu_item_object_id)];
		} else if ( 'post_type' == $_menu_item_type && isset( $this->processed_posts[intval($_menu_item_object_id)] ) ) {
			$_menu_item_object_id = $this->processed_posts[intval($_menu_item_object_id)];
		} else if ( 'custom' != $_menu_item_type ) {
			// associated object is missing or not imported yet, we'll retry later
			$this->missing_menu_items[] = $item;
			return;
		}

if ( isset( $this->processed_menu_items[intval($_menu_item_menu_item_parent)] ) ) {
			$_menu_item_menu_item_parent = $this->processed_menu_items[intval($_menu_item_menu_item_parent)];
		} else if ( $_menu_item_menu_item_parent ) {
			$this->menu_item_orphans[intval($item['post_id'])] = (int) $_menu_item_menu_item_parent;
			$_menu_item_menu_item_parent = 0;
		}

// 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']
		);

$id = $id = wp_update_nav_menu_item( $menu_id, 0, $args );
		if ( $id && ! is_wp_error( $id ) )
			$this->processed_menu_items[intval($item['post_id'])] = (int) $id;

foreach ( $item['postmeta'] as $meta ) {
			if ( strpos( '_menu', $meta['key'] ) === false ) {
				$key = apply_filters( 'import_post_meta_key', $meta['key'], $id, $item );
				$value = false;

if ( $key ) {
					// export gets meta straight from the DB so could have a serialized string
					if ( ! $value )
						$value = maybe_unserialize( $meta['value'] );

add_post_meta( $id, $key, $value );
					do_action( 'import_post_meta', $id, $key, $value );
				}
			}
		}
	}

/**
	 * Attempt to associate posts and menu items with previously missing parents
	 *
	 * An imported post's parent may not have been imported when it was first created
	 * so try again. Similarly for child menu items and menu items which were missing
	 * the object (e.g. post) they represent in the menu
	 */
	function backfill_parents() {
		global $wpdb;

// find parents for post orphans
		foreach ( $this->post_orphans as $child_id => $parent_id ) {
			$local_child_id = $local_parent_id = false;
			if ( isset( $this->processed_posts[$child_id] ) )
				$local_child_id = $this->processed_posts[$child_id];
			if ( isset( $this->processed_posts[$parent_id] ) )
				$local_parent_id = $this->processed_posts[$parent_id];

if ( $local_child_id && $local_parent_id )
				$wpdb->update( $wpdb->posts, array( 'post_parent' => $local_parent_id ), array( 'ID' => $local_child_id ), '%d', '%d' );
		}

// all other posts/terms are imported, retry menu items with missing associated object
		$missing_menu_items = $this->missing_menu_items;
		foreach ( $missing_menu_items as $item )
			$this->process_menu_item( $item );

// find parents for menu item orphans
		foreach ( $this->menu_item_orphans as $child_id => $parent_id ) {
			$local_child_id = $local_parent_id = 0;
			if ( isset( $this->processed_menu_items[$child_id] ) )
				$local_child_id = $this->processed_menu_items[$child_id];
			if ( isset( $this->processed_menu_items[$parent_id] ) )
				$local_parent_id = $this->processed_menu_items[$parent_id];

if ( $local_child_id && $local_parent_id )
				update_post_meta( $local_child_id, '_menu_item_menu_item_parent', (int) $local_parent_id );
		}
	}

/**
	 * Parse a WXR file
	 *
	 * @param string $file Path to WXR file for parsing
	 * @return array Information gathered from the WXR file
	 */
	function parse( $file ) {
		$parser = new VAMTAM_WXR_Parser();
		return $parser->parse( $file );
	}

// Display import page title
	function header() {
		echo '<div class="wrap">';
		echo '<h2>' . __( 'Import WordPress', 'wordpress-importer' ) . '</h2>';

$updates = get_plugin_updates();
		$basename = plugin_basename(__FILE__);
		if ( isset( $updates[$basename] ) ) {
			$update = $updates[$basename];
			echo '<div class="error"><p><strong>';
			printf( __( 'A new version of this importer is available. Please update to version %s to ensure compatibility with newer export files.', 'wordpress-importer' ), $update->update->new_version );
			echo '</strong></p></div>';
		}
	}

// Close div.wrap
	function footer() {
		echo '</div>';
	}

/**
	 * Display introductory text and file upload form
	 */
	function greet() {
		echo '<div class="narrow">';
		echo '<p>'.__( 'Howdy! Upload your WordPress eXtended RSS (WXR) file and we’ll import the posts, pages, comments, custom fields, categories, and tags into this site.', 'wordpress-importer' ).'</p>';
		echo '<p>'.__( 'Choose a WXR (.xml) file to upload, then click Upload file and import.', 'wordpress-importer' ).'</p>';
		wp_import_upload_form( 'admin.php?import=wordpress&step=1' );
		echo '</div>';
	}

/**
	 * Decide if the given meta key maps to information we will want to import
	 *
	 * @param string $key The meta key to check
	 * @return string|bool The key if we do want to import, false if not
	 */
	function is_valid_meta_key( $key ) {
		// skip attachment metadata since we'll regenerate it from scratch
		// skip _edit_lock as not relevant for import
		if ( in_array( $key, array( '_wp_attached_file', '_wp_attachment_metadata', '_edit_lock' ) ) )
			return false;
		return $key;
	}

/**
	 * Decide whether or not the importer is allowed to create users.
	 * Default is true, can be filtered via import_allow_create_users
	 *
	 * @return bool True if creating users is allowed
	 */
	function allow_create_users() {
		return apply_filters( 'import_allow_create_users', true );
	}

/**
	 * Decide whether or not the importer should attempt to download attachment files.
	 * Default is true, can be filtered via import_allow_fetch_attachments. The choice
	 * made at the import options screen must also be true, false here hides that checkbox.
	 *
	 * @return bool True if downloading attachments is allowed
	 */
	function allow_fetch_attachments() {
		return apply_filters( 'import_allow_fetch_attachments', true );
	}

/**
	 * Decide what the maximum file size for downloaded attachments is.
	 * Default is 0 (unlimited), can be filtered via import_attachment_size_limit
	 *
	 * @return int Maximum attachment file size to import
	 */
	function max_attachment_size() {
		return apply_filters( 'import_attachment_size_limit', 0 );
	}

/**
	 * Added to http_request_timeout filter to force timeout at 60 seconds during import
	 * @return int 60
	 */
	function bump_request_timeout( $val ) {
		return 60;
	}

function wc_import_status_actions() {
		if ( ! class_exists( 'WC_REST_System_Status_Tools_Controller' ) ) {
            // TODO: Add some messaging here to tell the user to run the required actions from WC->Status->Tools menu manually.
			return false;
		}

$tools_controller = new WC_REST_System_Status_Tools_Controller();
		$failed_actions   = [];

$actions_to_run   = [
			'clear_expired_transients',
			'clear_transients',
			'regenerate_product_lookup_tables',
			'verify_db_tables',
		];

foreach ( $actions_to_run as $action ) {
			$response = $tools_controller->execute_tool( $action );
			if ( $response['success'] === false ) {
				$failed_actions[] = $action;
			}
		}

if ( ! empty( $failed_actions ) ) {
            // TODO: Add some messaging here to tell the user to run the failed actions from WC->Status->Tools menu manually.
			return false;
		}
	}
}

} // class_exists( 'WP_Importer' )

function vamtam_importer_init() {
	if ( defined( 'VAMTAM_SAMPLES_DIR' ) ) {
		$GLOBALS['vamtam_import'] = new VAMTAM_Import();
		register_importer( 'wpv', 'Vamtam Demo Content', sprintf( esc_html__( 'Import posts, pages, comments, custom fields, categories, tags and sidebars from a %s dummy content file.', 'wordpress-importer' ), VAMTAM_THEME_NAME ), array( $GLOBALS['vamtam_import'], 'dispatch' ) );
	}
}
add_action( 'admin_init', 'vamtam_importer_init' );