<?php
/**
 * WordPress eXtended RSS file parser implementations
 *
 * @package WordPress
 * @subpackage Importer
 */

/**
 * WordPress Importer class for managing parsing of WXR files.
 */
if ( ! class_exists( 'PORTO_WXR_Parser' ) ) {
	class PORTO_WXR_Parser {
		function parse( $file ) {
			// Attempt to use proper XML parsers first
			if ( extension_loaded( 'simplexml' ) && class_exists( 'DOMDocument' ) ) {
				$parser = new PORTO_WXR_Parser_SimpleXML;
				$result = $parser->parse( $file );

				// If SimpleXML succeeds or this is an invalid WXR file then return the results
				if ( ! is_wp_error( $result ) || 'SimpleXML_parse_error' != $result->get_error_code() ) {
					return $result;
				}
			} elseif ( extension_loaded( 'xml' ) ) {
				$parser = new PORTO_WXR_Parser_XML;
				$result = $parser->parse( $file );

				// If XMLParser succeeds or this is an invalid WXR file then return the results
				if ( ! is_wp_error( $result ) || 'XML_parse_error' != $result->get_error_code() ) {
					return $result;
				}
			}

			// We have a malformed XML file, so display the error and fallthrough to regex
			if ( isset( $result ) && defined( 'IMPORT_DEBUG' ) && IMPORT_DEBUG ) {
				echo '<pre>';
				if ( 'SimpleXML_parse_error' == $result->get_error_code() ) {
					foreach ( $result->get_error_data() as $error ) {
						echo esc_html( $error->line . ':' . $error->column ) . ' ' . esc_html( $error->message ) . "\n";
					}
				} elseif ( 'XML_parse_error' == $result->get_error_code() ) {
					$error = $result->get_error_data();
					echo esc_html( $error[0] . ':' . $error[1] ) . ' ' . esc_html( $error[2] );
				}
				echo '</pre>';
				echo '<p><strong>' . esc_html__( 'There was an error when reading this WXR file', 'porto' ) . '</strong><br />';
				esc_html_e( 'Details are shown above. The importer will now try again with a different parser...', 'porto' ) . '</p>';
			}

			// use regular expressions if nothing else available or this is bad XML
			$parser = new PORTO_WXR_Parser_Regex;
			return $parser->parse( $file );
		}
	}
}

/**
 * WXR Parser that makes use of the SimpleXML PHP extension.
 */
if ( ! class_exists( 'PORTO_WXR_Parser_SimpleXML' ) ) {
	class PORTO_WXR_Parser_SimpleXML {
		function parse( $file ) {
			$authors = $posts = $categories = $tags = $terms = array();

			$internal_errors = libxml_use_internal_errors( true );

			$dom       = new DOMDocument;
			$old_value = null;
			if ( function_exists( 'libxml_disable_entity_loader' ) && PHP_VERSION_ID < 80000 ) {
				$old_value = libxml_disable_entity_loader( true );
			}

			if ( '.gz' === substr( $file, -3 ) ) {
				$gz            = gzopen( $file, 'r' );
				$file_contents = '';
				while ( ! gzeof( $gz ) ) {
					$file_contents .= gzgets( $gz, 8192 );
				}
				gzclose( $gz );
			} else {
				// filesystem
				global $wp_filesystem;
				// Initialize the WordPress filesystem, no more using file_put_contents function
				if ( empty( $wp_filesystem ) ) {
					require_once( ABSPATH . '/wp-admin/includes/file.php' );
					WP_Filesystem();
				}
				$file_contents = $wp_filesystem->get_contents( $file );
			}
			$success = $dom->loadXML( $file_contents );
			if ( ! is_null( $old_value ) ) {
				libxml_disable_entity_loader( $old_value );
			}

			if ( ! $success || isset( $dom->doctype ) ) {
				return new WP_Error( 'SimpleXML_parse_error', __( 'There was an error when reading this WXR file', 'porto' ), libxml_get_errors() );
			}

			$xml = simplexml_import_dom( $dom );
			unset( $dom );

			// halt if loading produces an error
			if ( ! $xml ) {
				return new WP_Error( 'SimpleXML_parse_error', __( 'There was an error when reading this WXR file', 'porto' ), libxml_get_errors() );
			}

			$wxr_version = $xml->xpath( '/rss/channel/wp:wxr_version' );
			if ( ! $wxr_version ) {
				return new WP_Error( 'PORTO_WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'porto' ) );
			}

			$wxr_version = (string) trim( $wxr_version[0] );
			// confirm that we are dealing with the correct file format
			if ( ! preg_match( '/^\d+\.\d+$/', $wxr_version ) ) {
				return new WP_Error( 'PORTO_WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'porto' ) );
			}

			$base_url = $xml->xpath( '/rss/channel/wp:base_site_url' );
			$base_url = (string) trim( $base_url[0] );

			$namespaces = $xml->getDocNamespaces();
			if ( ! isset( $namespaces['wp'] ) ) {
				$namespaces['wp'] = 'http://wordpress.org/export/1.1/';
			}
			if ( ! isset( $namespaces['excerpt'] ) ) {
				$namespaces['excerpt'] = 'http://wordpress.org/export/1.1/excerpt/';
			}

			// grab authors
			foreach ( $xml->xpath( '/rss/channel/wp:author' ) as $author_arr ) {
				$a                 = $author_arr->children( $namespaces['wp'] );
				$login             = (string) $a->author_login;
				$authors[ $login ] = array(
					'author_id'           => (int) $a->author_id,
					'author_login'        => $login,
					'author_email'        => (string) $a->author_email,
					'author_display_name' => (string) $a->author_display_name,
					'author_first_name'   => (string) $a->author_first_name,
					'author_last_name'    => (string) $a->author_last_name,
				);
			}

			// grab cats, tags and terms
			foreach ( $xml->xpath( '/rss/channel/wp:category' ) as $term_arr ) {
				$t        = $term_arr->children( $namespaces['wp'] );
				$category = array(
					'term_id'              => (int) $t->term_id,
					'category_nicename'    => (string) $t->category_nicename,
					'category_parent'      => (string) $t->category_parent,
					'cat_name'             => (string) $t->cat_name,
					'category_description' => (string) $t->category_description,
				);

				foreach ( $t->termmeta as $meta ) {
					$category['termmeta'][] = array(
						'key'   => (string) $meta->meta_key,
						'value' => (string) $meta->meta_value,
					);
				}

				if ( isset( $t->tax_meta ) ) {
					foreach ( $t->tax_meta as $meta ) {
						$category['tax_meta'][] = array(
							'key'   => (string) $meta->meta_key,
							'value' => (string) $meta->meta_value
						);
					}
				}

				$categories[] = $category;
			}

			foreach ( $xml->xpath( '/rss/channel/wp:tag' ) as $term_arr ) {
				$t   = $term_arr->children( $namespaces['wp'] );
				$tag = array(
					'term_id'         => (int) $t->term_id,
					'tag_slug'        => (string) $t->tag_slug,
					'tag_name'        => (string) $t->tag_name,
					'tag_description' => (string) $t->tag_description,
				);

				foreach ( $t->termmeta as $meta ) {
					$tag['termmeta'][] = array(
						'key'   => (string) $meta->meta_key,
						'value' => (string) $meta->meta_value,
					);
				}

				$tags[] = $tag;
			}

			foreach ( $xml->xpath( '/rss/channel/wp:term' ) as $term_arr ) {
				$t    = $term_arr->children( $namespaces['wp'] );
				$term = array(
					'term_id'          => (int) $t->term_id,
					'term_taxonomy'    => (string) $t->term_taxonomy,
					'slug'             => (string) $t->term_slug,
					'term_parent'      => (string) $t->term_parent,
					'term_name'        => (string) $t->term_name,
					'term_description' => (string) $t->term_description,
				);

				foreach ( $t->termmeta as $meta ) {
					$term['termmeta'][] = array(
						'key'   => (string) $meta->meta_key,
						'value' => (string) $meta->meta_value,
					);
				}

				if ( isset( $t->tax_meta ) ) {
					foreach ( $t->tax_meta as $meta ) {
						$term['tax_meta'][] = array(
							'key'   => (string) $meta->meta_key,
							'value' => (string) $meta->meta_value
						);
					}
				}

				$terms[] = $term;
			}

			// grab posts
			foreach ( $xml->channel->item as $item ) {
				$post = array(
					'post_title' => (string) $item->title,
					'guid'       => (string) $item->guid,
				);

				$dc                  = $item->children( 'http://purl.org/dc/elements/1.1/' );
				$post['post_author'] = (string) $dc->creator;

				$content              = $item->children( 'http://purl.org/rss/1.0/modules/content/' );
				$excerpt              = $item->children( $namespaces['excerpt'] );
				$post['post_content'] = (string) $content->encoded;
				$post['post_excerpt'] = (string) $excerpt->encoded;

				$wp                     = $item->children( $namespaces['wp'] );
				$post['post_id']        = (int) $wp->post_id;
				$post['post_date']      = (string) $wp->post_date;
				$post['post_date_gmt']  = (string) $wp->post_date_gmt;
				$post['comment_status'] = (string) $wp->comment_status;
				$post['ping_status']    = (string) $wp->ping_status;
				$post['post_name']      = (string) $wp->post_name;
				$post['status']         = (string) $wp->status;
				$post['post_parent']    = (int) $wp->post_parent;
				$post['menu_order']     = (int) $wp->menu_order;
				$post['post_type']      = (string) $wp->post_type;
				$post['post_password']  = (string) $wp->post_password;
				$post['is_sticky']      = (int) $wp->is_sticky;

				if ( isset( $wp->attachment_url ) ) {
					$post['attachment_url'] = (string) $wp->attachment_url;
				}

				foreach ( $item->category as $c ) {
					$att = $c->attributes();
					if ( isset( $att['nicename'] ) ) {
						$post['terms'][] = array(
							'name'   => (string) $c,
							'slug'   => (string) $att['nicename'],
							'domain' => (string) $att['domain'],
						);
					}
				}

				foreach ( $wp->postmeta as $meta ) {
					$post['postmeta'][] = array(
						'key'   => (string) $meta->meta_key,
						'value' => (string) $meta->meta_value,
					);
				}

				foreach ( $wp->comment as $comment ) {
					$meta = array();
					if ( isset( $comment->commentmeta ) ) {
						foreach ( $comment->commentmeta as $m ) {
							$meta[] = array(
								'key'   => (string) $m->meta_key,
								'value' => (string) $m->meta_value,
							);
						}
					}

					$post['comments'][] = array(
						'comment_id'           => (int) $comment->comment_id,
						'comment_author'       => (string) $comment->comment_author,
						'comment_author_email' => (string) $comment->comment_author_email,
						'comment_author_IP'    => (string) $comment->comment_author_IP,
						'comment_author_url'   => (string) $comment->comment_author_url,
						'comment_date'         => (string) $comment->comment_date,
						'comment_date_gmt'     => (string) $comment->comment_date_gmt,
						'comment_content'      => (string) $comment->comment_content,
						'comment_approved'     => (string) $comment->comment_approved,
						'comment_type'         => (string) $comment->comment_type,
						'comment_parent'       => (string) $comment->comment_parent,
						'comment_user_id'      => (int) $comment->comment_user_id,
						'commentmeta'          => $meta,
					);
				}

				$posts[] = $post;
			}

			return array(
				'authors'    => $authors,
				'posts'      => $posts,
				'categories' => $categories,
				'tags'       => $tags,
				'terms'      => $terms,
				'base_url'   => $base_url,
				'version'    => $wxr_version,
			);
		}
	}
}

/**
 * WXR Parser that makes use of the XML Parser PHP extension.
 */
if ( ! class_exists( 'PORTO_WXR_Parser_XML' ) ) {
	class PORTO_WXR_Parser_XML {
		public $wp_tags     = array(
			'wp:post_id',
			'wp:post_date',
			'wp:post_date_gmt',
			'wp:comment_status',
			'wp:ping_status',
			'wp:attachment_url',
			'wp:status',
			'wp:post_name',
			'wp:post_parent',
			'wp:menu_order',
			'wp:post_type',
			'wp:post_password',
			'wp:is_sticky',
			'wp:term_id',
			'wp:category_nicename',
			'wp:category_parent',
			'wp:cat_name',
			'wp:category_description',
			'wp:tag_slug',
			'wp:tag_name',
			'wp:tag_description',
			'wp:term_taxonomy',
			'wp:term_parent',
			'wp:term_name',
			'wp:term_description',
			'wp:author_id',
			'wp:author_login',
			'wp:author_email',
			'wp:author_display_name',
			'wp:author_first_name',
			'wp:author_last_name',
		);
		public $wp_sub_tags = array(
			'wp:comment_id',
			'wp:comment_author',
			'wp:comment_author_email',
			'wp:comment_author_url',
			'wp:comment_author_IP',
			'wp:comment_date',
			'wp:comment_date_gmt',
			'wp:comment_content',
			'wp:comment_approved',
			'wp:comment_type',
			'wp:comment_parent',
			'wp:comment_user_id',
		);

		public $wxr_version;
		public $in_post;
		public $cdata;
		public $data;
		public $sub_data;
		public $in_tag;
		public $in_sub_tag;
		public $authors;
		public $posts;
		public $term;
		public $category;
		public $tag;
		public $base_url;
		public $base_blog_url;

		function parse( $file ) {
			$this->wxr_version = $this->in_post = $this->cdata = $this->data = $this->sub_data = $this->in_tag = $this->in_sub_tag = false;
			$this->authors     = $this->posts = $this->term = $this->category = $this->tag = array();

			$xml = xml_parser_create( 'UTF-8' );
			xml_parser_set_option( $xml, XML_OPTION_SKIP_WHITE, 1 );
			xml_parser_set_option( $xml, XML_OPTION_CASE_FOLDING, 0 );
			xml_set_object( $xml, $this );
			xml_set_character_data_handler( $xml, 'cdata' );
			xml_set_element_handler( $xml, 'tag_open', 'tag_close' );

			if ( '.gz' === substr( $file, -3 ) ) {
				$gz            = gzopen( $file, 'r' );
				$file_contents = '';
				while ( ! gzeof( $gz ) ) {
					$file_contents .= gzgets( $gz, 8192 );
				}
				gzclose( $gz );
			} else {
				// filesystem
				global $wp_filesystem;
				// Initialize the WordPress filesystem, no more using file_put_contents function
				if ( empty( $wp_filesystem ) ) {
					require_once( ABSPATH . '/wp-admin/includes/file.php' );
					WP_Filesystem();
				}
				$file_contents = $wp_filesystem->get_contents( $file );
			}
			if ( ! xml_parse( $xml, $file_contents, true ) ) {
				$current_line   = xml_get_current_line_number( $xml );
				$current_column = xml_get_current_column_number( $xml );
				$error_code     = xml_get_error_code( $xml );
				$error_string   = xml_error_string( $error_code );
				return new WP_Error( 'XML_parse_error', 'There was an error when reading this WXR file', array( $current_line, $current_column, $error_string ) );
			}
			PHP_VERSION_ID < 80000 && xml_parser_free( $xml );

			if ( ! preg_match( '/^\d+\.\d+$/', $this->wxr_version ) ) {
				return new WP_Error( 'PORTO_WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'porto' ) );
			}

			return array(
				'authors'    => $this->authors,
				'posts'      => $this->posts,
				'categories' => $this->category,
				'tags'       => $this->tag,
				'terms'      => $this->term,
				'base_url'   => $this->base_url,
				'version'    => $this->wxr_version,
			);
		}

		function tag_open( $parse, $tag, $attr ) {
			if ( in_array( $tag, $this->wp_tags ) ) {
				$this->in_tag = substr( $tag, 3 );
				return;
			}

			if ( in_array( $tag, $this->wp_sub_tags ) ) {
				$this->in_sub_tag = substr( $tag, 3 );
				return;
			}

			switch ( $tag ) {
				case 'category':
					if ( isset( $attr['domain'], $attr['nicename'] ) ) {
						$this->sub_data['domain'] = $attr['domain'];
						$this->sub_data['slug']   = $attr['nicename'];
					}
					break;
				case 'item':
					$this->in_post = true;
				case 'title':
					if ( $this->in_post ) {
						$this->in_tag = 'post_title';
					} break;
				case 'guid':
					$this->in_tag = 'guid';
					break;
				case 'dc:creator':
					$this->in_tag = 'post_author';
					break;
				case 'content:encoded':
					$this->in_tag = 'post_content';
					break;
				case 'excerpt:encoded':
					$this->in_tag = 'post_excerpt';
					break;

				case 'wp:term_slug':
					$this->in_tag = 'slug';
					break;
				case 'wp:meta_key':
					$this->in_sub_tag = 'key';
					break;
				case 'wp:meta_value':
					$this->in_sub_tag = 'value';
					break;
			}
		}

		function cdata( $parser, $cdata ) {
			if ( ! trim( $cdata ) ) {
				return;
			}

			if ( false !== $this->in_tag || false !== $this->in_sub_tag ) {
				$this->cdata .= $cdata;
			} else {
				$this->cdata .= trim( $cdata );
			}
		}

		function tag_close( $parser, $tag ) {
			switch ( $tag ) {
				case 'wp:comment':
					unset( $this->sub_data['key'], $this->sub_data['value'] ); // remove meta sub_data
					if ( ! empty( $this->sub_data ) ) {
						$this->data['comments'][] = $this->sub_data;
					}
					$this->sub_data = false;
					break;
				case 'wp:commentmeta':
					$this->sub_data['commentmeta'][] = array(
						'key'   => $this->sub_data['key'],
						'value' => $this->sub_data['value'],
					);
					break;
				case 'category':
					if ( ! empty( $this->sub_data ) ) {
						$this->sub_data['name'] = $this->cdata;
						$this->data['terms'][]  = $this->sub_data;
					}
					$this->sub_data = false;
					break;
				case 'wp:postmeta':
					if ( ! empty( $this->sub_data ) ) {
						$this->data['postmeta'][] = $this->sub_data;
					}
					$this->sub_data = false;
					break;
				case 'item':
					$this->posts[] = $this->data;
					$this->data    = false;
					break;
				case 'wp:category':
				case 'wp:tag':
				case 'wp:term':
					$n = substr( $tag, 3 );
					array_push( $this->$n, $this->data );
					$this->data = false;
					break;
				case 'wp:author':
					if ( ! empty( $this->data['author_login'] ) ) {
						$this->authors[ $this->data['author_login'] ] = $this->data;
					}
					$this->data = false;
					break;
				case 'wp:base_site_url':
					$this->base_url = $this->cdata;
					break;
				case 'wp:wxr_version':
					$this->wxr_version = $this->cdata;
					break;

				default:
					if ( $this->in_sub_tag ) {
						$this->sub_data[ $this->in_sub_tag ] = ! empty( $this->cdata ) ? $this->cdata : '';
						$this->in_sub_tag                    = false;
					} elseif ( $this->in_tag ) {
						$this->data[ $this->in_tag ] = ! empty( $this->cdata ) ? $this->cdata : '';
						$this->in_tag                = false;
					}
			}

			$this->cdata = false;
		}
	}
}

/**
 * WXR Parser that uses regular expressions. Fallback for installs without an XML parser.
 */
if ( ! class_exists( 'PORTO_WXR_Parser_Regex' ) ) {
	class PORTO_WXR_Parser_Regex {
		public $authors       = array();
		public $posts         = array();
		public $categories    = array();
		public $tags          = array();
		public $terms         = array();
		public $base_url      = '';
		public $base_blog_url = '';
		public $has_gzip;

		function __construct() {
			$this->has_gzip = is_callable( 'gzopen' );
		}

		function parse( $file ) {
			$wxr_version  = false;
			$in_multiline = false;

			$multiline_content = '';

			$multiline_tags = array(
				'item'        => array( 'posts', array( $this, 'process_post' ) ),
				'wp:category' => array( 'categories', array( $this, 'process_category' ) ),
				'wp:tag'      => array( 'tags', array( $this, 'process_tag' ) ),
				'wp:term'     => array( 'terms', array( $this, 'process_term' ) ),
			);

			$fp = $this->fopen( $file, 'r' );
			if ( $fp ) {
				while ( ! $this->feof( $fp ) ) {
					$is_tag_line = false;
					$importline  = rtrim( $this->fgets( $fp ) );

					if ( ! $wxr_version && preg_match( '|<wp:wxr_version>(\d+\.\d+)</wp:wxr_version>|', $importline, $version ) ) {
						$wxr_version = $version[1];
					}

					if ( false !== strpos( $importline, '<wp:base_site_url>' ) ) {
						preg_match( '|<wp:base_site_url>(.*?)</wp:base_site_url>|is', $importline, $url );
						$this->base_url = $url[1];
						continue;
					}

					if ( false !== strpos( $importline, '<wp:base_blog_url>' ) ) {
						preg_match( '|<wp:base_blog_url>(.*?)</wp:base_blog_url>|is', $importline, $blog_url );
						$this->base_blog_url = $blog_url[1];
						continue;
					} elseif ( empty( $this->base_blog_url ) ) {
						$this->base_blog_url = $this->base_url;
					}

					if ( false !== strpos( $importline, '<wp:author>' ) ) {
						preg_match( '|<wp:author>(.*?)</wp:author>|is', $importline, $author );
						$a                                   = $this->process_author( $author[1] );
						$this->authors[ $a['author_login'] ] = $a;
						continue;
					}

					foreach ( $multiline_tags as $tag => $handler ) {
						// Handle multi-line tags on a singular line
						$pos         = strpos( $importline, "<$tag>" );
						$pos_closing = strpos( $importline, "</$tag>" );
						if ( preg_match( '|<' . $tag . '>(.*?)</' . $tag . '>|is', $importline, $matches ) ) {
							$this->{$handler[0]}[] = call_user_func( $handler[1], $matches[1] );

						} elseif ( false !== $pos ) {
							// Take note of any content after the opening tag
							$multiline_content = trim( substr( $importline, $pos + strlen( $tag ) + 2 ) );

							// We don't want to have this line added to `$is_multiline` below.
							$in_multiline = $tag;
							$is_tag_line  = true;

						} elseif ( false !== $pos_closing ) {
							$in_multiline       = false;
							$multiline_content .= trim( substr( $importline, 0, $pos_closing ) );

							$this->{$handler[0]}[] = call_user_func( $handler[1], $multiline_content );
						}
					}

					if ( $in_multiline && ! $is_tag_line ) {
						$multiline_content .= $importline/* . "\n"*/;
					}
				}

				$this->fclose( $fp );
			}

			if ( ! $wxr_version ) {
				return new WP_Error( 'PORTO_WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'porto' ) );
			}

			return array(
				'authors'       => $this->authors,
				'posts'         => $this->posts,
				'categories'    => $this->categories,
				'tags'          => $this->tags,
				'terms'         => $this->terms,
				'base_url'      => $this->base_url,
				'base_blog_url' => $this->base_blog_url,
				'version'       => $wxr_version,
			);
		}

		function get_tag( $string, $tag ) {
			preg_match( "|<$tag.*?>(.*?)</$tag>|is", $string, $return );
			if ( isset( $return[1] ) ) {
				if ( substr( $return[1], 0, 9 ) == '<![CDATA[' ) {
					if ( strpos( $return[1], ']]]]><![CDATA[>' ) !== false ) {
						preg_match_all( '|<!\[CDATA\[(.*?)\]\]>|s', $return[1], $matches );
						$return = '';
						foreach ( $matches[1] as $match ) {
							$return .= $match;
						}
					} else {
						$return = preg_replace( '|^<!\[CDATA\[(.*)\]\]>$|s', '$1', $return[1] );
					}
				} else {
					$return = $return[1];
				}
			} else {
				$return = '';
			}
			return $return;
		}

		function process_category( $c ) {
			$term = array(
				'term_id'              => $this->get_tag( $c, 'wp:term_id' ),
				'cat_name'             => $this->get_tag( $c, 'wp:cat_name' ),
				'category_nicename'    => $this->get_tag( $c, 'wp:category_nicename' ),
				'category_parent'      => $this->get_tag( $c, 'wp:category_parent' ),
				'category_description' => $this->get_tag( $c, 'wp:category_description' ),
			);

			$term_meta = $this->process_meta( $c, 'wp:termmeta' );
			if ( ! empty( $term_meta ) ) {
				$term['termmeta'] = $term_meta;
			}

			return $term;
		}

		function process_tag( $t ) {
			$term = array(
				'term_id'         => $this->get_tag( $t, 'wp:term_id' ),
				'tag_name'        => $this->get_tag( $t, 'wp:tag_name' ),
				'tag_slug'        => $this->get_tag( $t, 'wp:tag_slug' ),
				'tag_description' => $this->get_tag( $t, 'wp:tag_description' ),
			);

			$term_meta = $this->process_meta( $t, 'wp:termmeta' );
			if ( ! empty( $term_meta ) ) {
				$term['termmeta'] = $term_meta;
			}

			return $term;
		}

		function process_term( $t ) {
			$term = array(
				'term_id'          => $this->get_tag( $t, 'wp:term_id' ),
				'term_taxonomy'    => $this->get_tag( $t, 'wp:term_taxonomy' ),
				'slug'             => $this->get_tag( $t, 'wp:term_slug' ),
				'term_parent'      => $this->get_tag( $t, 'wp:term_parent' ),
				'term_name'        => $this->get_tag( $t, 'wp:term_name' ),
				'term_description' => $this->get_tag( $t, 'wp:term_description' ),
			);

			$term_meta = $this->process_meta( $t, 'wp:termmeta' );
			if ( ! empty( $term_meta ) ) {
				$term['termmeta'] = $term_meta;
			}

			return $term;
		}

		function process_meta( $string, $tag ) {
			$parsed_meta = array();

			preg_match_all( "|<$tag>(.+?)</$tag>|is", $string, $meta );

			if ( ! isset( $meta[1] ) ) {
				return $parsed_meta;
			}

			foreach ( $meta[1] as $m ) {
				$parsed_meta[] = array(
					'key'   => $this->get_tag( $m, 'wp:meta_key' ),
					'value' => $this->get_tag( $m, 'wp:meta_value' ),
				);
			}

			return $parsed_meta;
		}

		function process_author( $a ) {
			return array(
				'author_id'           => $this->get_tag( $a, 'wp:author_id' ),
				'author_login'        => $this->get_tag( $a, 'wp:author_login' ),
				'author_email'        => $this->get_tag( $a, 'wp:author_email' ),
				'author_display_name' => $this->get_tag( $a, 'wp:author_display_name' ),
				'author_first_name'   => $this->get_tag( $a, 'wp:author_first_name' ),
				'author_last_name'    => $this->get_tag( $a, 'wp:author_last_name' ),
			);
		}

		function process_post( $post ) {
			$post_id        = $this->get_tag( $post, 'wp:post_id' );
			$post_title     = $this->get_tag( $post, 'title' );
			$post_date      = $this->get_tag( $post, 'wp:post_date' );
			$post_date_gmt  = $this->get_tag( $post, 'wp:post_date_gmt' );
			$comment_status = $this->get_tag( $post, 'wp:comment_status' );
			$ping_status    = $this->get_tag( $post, 'wp:ping_status' );
			$status         = $this->get_tag( $post, 'wp:status' );
			$post_name      = $this->get_tag( $post, 'wp:post_name' );
			$post_parent    = $this->get_tag( $post, 'wp:post_parent' );
			$menu_order     = $this->get_tag( $post, 'wp:menu_order' );
			$post_type      = $this->get_tag( $post, 'wp:post_type' );
			$post_password  = $this->get_tag( $post, 'wp:post_password' );
			$is_sticky      = $this->get_tag( $post, 'wp:is_sticky' );
			$guid           = $this->get_tag( $post, 'guid' );
			$post_author    = $this->get_tag( $post, 'dc:creator' );

			$post_excerpt = $this->get_tag( $post, 'excerpt:encoded' );
			$post_excerpt = preg_replace_callback( '|<(/?[A-Z]+)|', array( &$this, '_normalize_tag' ), $post_excerpt );
			$post_excerpt = str_replace( '<br>', '<br />', $post_excerpt );
			$post_excerpt = str_replace( '<hr>', '<hr />', $post_excerpt );

			$post_content = $this->get_tag( $post, 'content:encoded' );
			$post_content = preg_replace_callback( '|<(/?[A-Z]+)|', array( &$this, '_normalize_tag' ), $post_content );
			$post_content = str_replace( '<br>', '<br />', $post_content );
			$post_content = str_replace( '<hr>', '<hr />', $post_content );

			$postdata = compact(
				'post_id',
				'post_author',
				'post_date',
				'post_date_gmt',
				'post_content',
				'post_excerpt',
				'post_title',
				'status',
				'post_name',
				'comment_status',
				'ping_status',
				'guid',
				'post_parent',
				'menu_order',
				'post_type',
				'post_password',
				'is_sticky'
			);

			$attachment_url = $this->get_tag( $post, 'wp:attachment_url' );
			if ( $attachment_url ) {
				$postdata['attachment_url'] = $attachment_url;
			}

			preg_match_all( '|<category domain="([^"]+?)" nicename="([^"]+?)">(.+?)</category>|is', $post, $terms, PREG_SET_ORDER );
			foreach ( $terms as $t ) {
				$post_terms[] = array(
					'slug'   => $t[2],
					'domain' => $t[1],
					'name'   => str_replace( array( '<![CDATA[', ']]>' ), '', $t[3] ),
				);
			}
			if ( ! empty( $post_terms ) ) {
				$postdata['terms'] = $post_terms;
			}

			preg_match_all( '|<wp:comment>(.+?)</wp:comment>|is', $post, $comments );
			$comments = $comments[1];
			if ( $comments ) {
				foreach ( $comments as $comment ) {
					$post_comments[] = array(
						'comment_id'           => $this->get_tag( $comment, 'wp:comment_id' ),
						'comment_author'       => $this->get_tag( $comment, 'wp:comment_author' ),
						'comment_author_email' => $this->get_tag( $comment, 'wp:comment_author_email' ),
						'comment_author_IP'    => $this->get_tag( $comment, 'wp:comment_author_IP' ),
						'comment_author_url'   => $this->get_tag( $comment, 'wp:comment_author_url' ),
						'comment_date'         => $this->get_tag( $comment, 'wp:comment_date' ),
						'comment_date_gmt'     => $this->get_tag( $comment, 'wp:comment_date_gmt' ),
						'comment_content'      => $this->get_tag( $comment, 'wp:comment_content' ),
						'comment_approved'     => $this->get_tag( $comment, 'wp:comment_approved' ),
						'comment_type'         => $this->get_tag( $comment, 'wp:comment_type' ),
						'comment_parent'       => $this->get_tag( $comment, 'wp:comment_parent' ),
						'comment_user_id'      => $this->get_tag( $comment, 'wp:comment_user_id' ),
						'commentmeta'          => $this->process_meta( $comment, 'wp:commentmeta' ),
					);
				}
			}
			if ( ! empty( $post_comments ) ) {
				$postdata['comments'] = $post_comments;
			}

			$post_meta = $this->process_meta( $post, 'wp:postmeta' );
			if ( ! empty( $post_meta ) ) {
				$postdata['postmeta'] = $post_meta;
			}

			return $postdata;
		}

		function _normalize_tag( $matches ) {
			return '<' . strtolower( $matches[1] );
		}

		function fopen( $filename, $mode = 'r' ) {
			if ( $this->has_gzip ) {
				return gzopen( $filename, $mode );
			}
			return fopen( $filename, $mode );
		}

		function feof( $fp ) {
			if ( $this->has_gzip ) {
				return gzeof( $fp );
			}
			return feof( $fp );
		}

		function fgets( $fp, $len = 8192 ) {
			if ( $this->has_gzip ) {
				return gzgets( $fp, $len );
			}
			return fgets( $fp, $len );
		}

		function fclose( $fp ) {
			if ( $this->has_gzip ) {
				return gzclose( $fp );
			}
			return fclose( $fp );
		}
	}
}
