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

/**
 * WordPress Importer class for managing parsing of WXR files.
 */
if (!class_exists("CT_WXR_Parser")) {
    class CT_WXR_Parser
    {
        function parse( $file ) {
            // Attempt to use proper XML parsers first
            if ( extension_loaded( 'simplexml' ) ) {
                $parser = new CT_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;
            } else if ( extension_loaded( 'xml' ) ) {
                $parser = new 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 $error->line . ':' . $error->column . ' ' . esc_html( $error->message ) . "\n";
                } else if ( 'XML_parse_error' == $result->get_error_code() ) {
                    $error = $result->get_error_data();
                    echo $error[0] . ':' . $error[1] . ' ' . esc_html( $error[2] );
                }
                echo '</pre>';
                echo '<p><strong>' . __( 'There was an error when reading this WXR file', 'wordpress-importer' ) . '</strong><br />';
                echo __( 'Details are shown above. The importer will now try again with a different parser...', 'wordpress-importer' ) . '</p>';
            }

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

/**
 * WXR Parser that makes use of the SimpleXML PHP extension.
 */
if (!class_exists("CT_WXR_Parser_SimpleXML")) {
    class CT_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' ) ) {
                $old_value = libxml_disable_entity_loader( true );
            }
            $success = $dom->loadXML( file_get_contents( $file ) );
            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', 'wordpress-importer' ), 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', 'wordpress-importer' ), libxml_get_errors() );

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

            $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( 'WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'wordpress-importer' ) );

            $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
                    );
                }

                $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
                    );
                }

                $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("CT_WXR_Parser_XML")) {
    class CT_WXR_Parser_XML
    {
        var $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',
        );
        var $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',
        );

        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 ( ! xml_parse( $xml, file_get_contents( $file ), 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 ) );
            }
            xml_parser_free( $xml );

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

            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;
                    } else if ( $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("CT_WXR_Parser_Regex")) {
    class CT_WXR_Parser_Regex
    {
        var $authors = array();
        var $posts = array();
        var $categories = array();
        var $tags = array();
        var $terms = array();
        var $base_url = '';

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

        function parse( $file ) {
            $wxr_version = $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 ) ) {
                    $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: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
                        if ( preg_match( '|<' . $tag . '>(.*?)</' . $tag . '>|is', $importline, $matches ) ) {
                            $this->{$handler[0]}[] = call_user_func( $handler[1], $matches[1] );

                        } elseif ( false !== ( $pos = strpos( $importline, "<$tag>" ) ) ) {
                            // 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.
                            $importline        = '';
                            $in_multiline      = $tag;

                        } elseif ( false !== ( $pos = strpos( $importline, "</$tag>" ) ) ) {
                            $in_multiline          = false;
                            $multiline_content    .= trim( substr( $importline, 0, $pos ) );

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

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

                $this->fclose($fp);
            }

            if ( ! $wxr_version )
                return new WP_Error( 'WXR_parse_error', __( 'This does not appear to be a WXR file, missing/invalid WXR version number', 'wordpress-importer' ) );

            return array(
                'authors' => $this->authors,
                'posts' => $this->posts,
                'categories' => $this->categories,
                'tags' => $this->tags,
                'terms' => $this->terms,
                'base_url' => $this->base_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 ) {
            return 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' ),
            );
        }

        function process_tag( $t ) {
            return 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' ),
            );
        }

        function process_term( $t ) {
            return 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' ),
            );
        }

        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 ) {
                    preg_match_all( '|<wp:commentmeta>(.+?)</wp:commentmeta>|is', $comment, $commentmeta );
                    $commentmeta = $commentmeta[1];
                    $c_meta = array();
                    foreach ( $commentmeta as $m ) {
                        $c_meta[] = array(
                            'key' => $this->get_tag( $m, 'wp:meta_key' ),
                            'value' => $this->get_tag( $m, 'wp:meta_value' ),
                        );
                    }

                    $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' => $c_meta,
                    );
                }
            }
            if ( ! empty( $post_comments ) ) $postdata['comments'] = $post_comments;

            preg_match_all( '|<wp:postmeta>(.+?)</wp:postmeta>|is', $post, $postmeta );
            $postmeta = $postmeta[1];
            if ( $postmeta ) {
                foreach ( $postmeta as $p ) {
                    $post_postmeta[] = array(
                        'key' => $this->get_tag( $p, 'wp:meta_key' ),
                        'value' => $this->get_tag( $p, 'wp:meta_value' ),
                    );
                }
            }
            if ( ! empty( $post_postmeta ) ) $postdata['postmeta'] = $post_postmeta;

            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 );
        }
    }
}