/**
 *  Imports user selected chapters from an instance of PB 
 * 
 * @param array $chapters
 * Array(
  [5] => Array(
    [222] => chapter
    )
  [14] => Array(
    [164] => front-matter
    )
  )
 * @return type
 */
 function import(array $chapters)
 {
     $this->chapters = $chapters;
     $chapters_to_import = $this->getChapters();
     libxml_use_internal_errors(true);
     foreach ($chapters_to_import as $new_post) {
         // Load HTMl snippet into DOMDocument using UTF-8 hack
         $utf8_hack = '<?xml version="1.0" encoding="UTF-8"?>';
         $doc = new \DOMDocument();
         $doc->loadHTML($utf8_hack . $new_post['post_content']);
         // Download images, change image paths
         $doc = $this->scrapeAndKneadImages($doc);
         $html = $doc->saveXML($doc->documentElement);
         // Remove auto-created <html> <body> and <!DOCTYPE> tags.
         $html = preg_replace('/^<!DOCTYPE.+?>/', '', str_replace(array('<html>', '</html>', '<body>', '</body>'), array('', '', '', ''), $html));
         $import_post = array('post_title' => $new_post['post_title'], 'post_content' => $html, 'post_type' => $new_post['post_type'], 'post_status' => $new_post['post_status']);
         // set post parent
         if ('chapter' == $new_post['post_type']) {
             $post_parent = $this->getChapterParent();
             $import_post['post_parent'] = $post_parent;
         }
         // woot, woot!
         $pid = wp_insert_post($import_post);
         // check for errors, redirect and record
         if (is_wp_error($pid)) {
             error_log('\\PBT\\Import\\PBImport()->import error at `wp_insert_post()`: ' . $pid->get_error_message());
             \PBT\Search\ApiSearch::revokeCurrentImport();
             \Pressbooks\Redirect\location(get_bloginfo('url') . '/wp-admin/admin.php?page=api_search_import');
         }
         // set post metadata
         $this->setPostMeta($pid, $new_post);
         \Pressbooks\Book::consolidatePost($pid, get_post($pid));
     }
     return \PBT\Search\ApiSearch::revokeCurrentImport();
 }
	/**
	 * 
	 * @param array $current_import
	 */
	function import( array $current_import ) {
		$parent = 0;
		foreach ( $current_import as $import ) {
			
			// fetch the remote content
			$html = wp_remote_get( $import['file'] );
			
			if( is_wp_error( $html ) ){
				$err = $html->get_error_message();
				error_log( '\PBT\Import\RemoteImport\import() error with wp_remote_get(): ' . $err );
				unset( $html );
				$html['body'] = $err;
			}
			
			$url = parse_url( $import['file'] );
			// get parent directory (with forward slash e.g. /parent)
			$path = dirname( $url['path'] );

			$domain = $url['scheme'] . '://' . $url['host'] . $path;

			// get id (there will be only one)
			$id = array_keys( $import['chapters'] );

			// front-matter, part, chapter, or back-matter
			$post_type = ( isset( $import['type'] ) ) ? $import['type'] : $this->determinePostType( $id[0] );

			// chapter is the exception, needs a post_parent other than 0
			// front-matter, back-matter, parts all have post parent = 0;
			if ( 'chapter' == $post_type ){
				$chapter_parent = $this->getChapterParent();
			} else {
				$chapter_parent = $parent;
			}

			$pid = $this->kneadandInsert( $html['body'], $post_type, $chapter_parent, $domain );
			
			// set variable with Post ID of the last Part
			if ( 'part' == $post_type ){
				$parent = $pid;
			}
			
		}
		// Done
		return Search\ApiSearch::revokeCurrentImport();
	}