root/trunk/wp-admin/import/livejournal.php

<?php
/**
 * LiveJournal Importer
 *
 * @package WordPress
 * @subpackage Importer
 */

/**
 * LiveJournal Importer class
 *
 * Imports your LiveJournal XML exported file into WordPress.
 *
 * @since unknown
 */
class LJ_Import {

    var $file;

    function header() {
        echo '<div class="wrap">';
        echo '<h2>'.__('Import LiveJournal').'</h2>';
    }

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

    function unhtmlentities($string) { // From php.net for < 4.3 compat
        $trans_tbl = get_html_translation_table(HTML_ENTITIES);
        $trans_tbl = array_flip($trans_tbl);
        return strtr($string, $trans_tbl);
    }

    function greet() {
        echo '<div class="narrow">';
        echo '<p>'.__('Howdy! Upload your LiveJournal XML export file and we&#8217;ll import the posts into this blog.').'</p>';
        echo '<p>'.__('Choose a LiveJournal XML file to upload, then click Upload file and import.').'</p>';
        wp_import_upload_form("admin.php?import=livejournal&amp;step=1");
        echo '</div>';
    }

    function import_posts() {
        global $wpdb, $current_user;

        set_magic_quotes_runtime(0);
        $importdata = file($this->file); // Read the file into an array
        $importdata = implode('', $importdata); // squish it
        $importdata = str_replace(array ("\r\n", "\r"), "\n", $importdata);

        preg_match_all('|<entry>(.*?)</entry>|is', $importdata, $posts);
        $posts = $posts[1];
        unset($importdata);
        echo '<ol>';
        foreach ($posts as $post) {
            preg_match('|<subject>(.*?)</subject>|is', $post, $post_title);
            $post_title = $wpdb->escape(trim($post_title[1]));
            if ( empty($post_title) ) {
                preg_match('|<itemid>(.*?)</itemid>|is', $post, $post_title);
                $post_title = $wpdb->escape(trim($post_title[1]));
            }

            preg_match('|<eventtime>(.*?)</eventtime>|is', $post, $post_date);
            $post_date = strtotime($post_date[1]);
            $post_date = date('Y-m-d H:i:s', $post_date);

            preg_match('|<event>(.*?)</event>|is', $post, $post_content);
            $post_content = str_replace(array ('<![CDATA[', ']]>'), '', trim($post_content[1]));
            $post_content = $this->unhtmlentities($post_content);

            // Clean up content
            $post_content = preg_replace('|<(/?[A-Z]+)|e', "'<' . strtolower('$1')", $post_content);
            $post_content = str_replace('<br>', '<br />', $post_content);
            $post_content = str_replace('<hr>', '<hr />', $post_content);
            $post_content = $wpdb->escape($post_content);

            $post_author = $current_user->ID;
            $post_status = 'publish';

            echo '<li>';
            if ($post_id = post_exists($post_title, $post_content, $post_date)) {
                printf(__('Post <em>%s</em> already exists.'), stripslashes($post_title));
            } else {
                printf(__('Importing post <em>%s</em>...'), stripslashes($post_title));
                $postdata = compact('post_author', 'post_date', 'post_content', 'post_title', 'post_status');
                $post_id = wp_insert_post($postdata);
                if ( is_wp_error( $post_id ) )
                    return $post_id;
                if (!$post_id) {
                    _e("Couldn't get post ID");
                    echo '</li>';
                    break;
                }
            }

            preg_match_all('|<comment>(.*?)</comment>|is', $post, $comments);
            $comments = $comments[1];

            if ( $comments ) {
                $comment_post_ID = (int) $post_id;
                $num_comments = 0;
                foreach ($comments as $comment) {
                    preg_match('|<event>(.*?)</event>|is', $comment, $comment_content);
                    $comment_content = str_replace(array ('<![CDATA[', ']]>'), '', trim($comment_content[1]));
                    $comment_content = $this->unhtmlentities($comment_content);

                    // Clean up content
                    $comment_content = preg_replace('|<(/?[A-Z]+)|e', "'<' . strtolower('$1')", $comment_content);
                    $comment_content = str_replace('<br>', '<br />', $comment_content);
                    $comment_content = str_replace('<hr>', '<hr />', $comment_content);
                    $comment_content = $wpdb->escape($comment_content);

                    preg_match('|<eventtime>(.*?)</eventtime>|is', $comment, $comment_date);
                    $comment_date = trim($comment_date[1]);
                    $comment_date = date('Y-m-d H:i:s', strtotime($comment_date));

                    preg_match('|<name>(.*?)</name>|is', $comment, $comment_author);
                    $comment_author = $wpdb->escape(trim($comment_author[1]));

                    preg_match('|<email>(.*?)</email>|is', $comment, $comment_author_email);
                    $comment_author_email = $wpdb->escape(trim($comment_author_email[1]));

                    $comment_approved = 1;
                    // Check if it's already there
                    if (!comment_exists($comment_author, $comment_date)) {
                        $commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_date', 'comment_content', 'comment_approved');
                        $commentdata = wp_filter_comment($commentdata);
                        wp_insert_comment($commentdata);
                        $num_comments++;
                    }
                }
            }
            if ( $num_comments ) {
                echo ' ';
                printf(__ngettext('(%s comment)', '(%s comments)', $num_comments), $num_comments);
            }
            echo '</li>';
        }
        echo '</ol>';
    }

    function import() {
        $file = wp_import_handle_upload();
        if ( isset($file['error']) ) {
            echo $file['error'];
            return;
        }

        $this->file = $file['file'];
        $result = $this->import_posts();
        if ( is_wp_error( $result ) )
            return $result;
        wp_import_cleanup($file['id']);
        do_action('import_done', 'livejournal');

        echo '<h3>';
        printf(__('All done. <a href="%s">Have fun!</a>'), get_option('home'));
        echo '</h3>';
    }

    function dispatch() {
        if (empty ($_GET['step']))
            $step = 0;
        else
            $step = (int) $_GET['step'];

        $this->header();

        switch ($step) {
            case 0 :
                $this->greet();
                break;
            case 1 :
                check_admin_referer('import-upload');
                $result = $this->import();
                if ( is_wp_error( $result ) )
                    echo $result->get_error_message();
                break;
        }

        $this->footer();
    }

    function LJ_Import() {
        // Nothing.
    }
}

$livejournal_import = new LJ_Import();

register_importer('livejournal', __('LiveJournal'), __('Import posts from a LiveJournal XML export file.'), array ($livejournal_import, 'dispatch'));
?>