root/blogger-title-fix/tags/0.1/blogger-title-fix.php

<?php
/*
Plugin Name: Blogger Title Fix
Plugin URI: http://notions.okuda.ca/wordpress-plugins/blogger-title-fix/
Description: Replaces numerical titles (from Blogger import) with the first few words of the post.
Author: Poco
Version: 0.1
Author URI: http://notions.okuda.ca
*/


class ko_blogger_title_fix
{

        function fragment($str, $n, $delim='...')
        {
                $len = strlen($str);
                if ($len > $n)
                {
                        // This code would limit the output to about n characters and not cut any words.
                        // This looks a bit better than the default, but this is not how Blogger reacts.
                        //preg_match('/(.{' . $n . '}.*?)\b/', $str, $matches);
                        //return rtrim($matches[1]) . $delim;

                        // Just take the first n characters, like Blogger does.
                        return substr(trim($str), 0, $n) . $delim;
                }
                else
                {
                        return $str;
                }
        }

        function is_bad_title($title)
        {
                // Look for a title that is only decimal digits (or empty)
                return preg_match("/^\d*$/", $title);
        }

        function filter_title($content = '', $thispost = NULL)
        {
                global $post;

                // If we didn't get a post parameter then use the global one.
                if (!isset($thispost))
                {
                        $thispost = post;
                }
                else
                {
                        // In generate $thispost will only contain the ID and Title and we need more
                        // So get it now.
                        $thispost = get_post($thispost->ID);
                }

                if ($this->is_bad_title($content))
                {
                        // Couldn't think of a better way to handle this.
                        // Stole this code from get_the_excerpt except that it uses the available $thispost
                        // instead of the global $post.
                        $output = $thispost->post_excerpt;
                        if ( !empty($thispost->post_password) ) { // if there's a password
                                if ( $_COOKIE['wp-postpass_'.COOKIEHASH] != $thispost->post_password ) {  // and it doesn't match the cookie
                                        $output = "";  // empty title
                                }
                        }

                        // If there is no excerpt then we take the content.  Again, there was no good function to call
                        // here since they all assume $post is global.
                        if ( '' == $output ) {
                                $output = $thispost->post_content;
                                $output = apply_filters('the_content', $output);
                                $output = str_replace(']]>', ']]&gt;', $output);
                                $output = strip_tags($output);
                        }


                        $newtitle = $this->fragment($output, 48, '...');
                        return $newtitle;
                }
                else
                {
                        return $content;
                }
        }
}

$ko_blogger_title_fix_instance = new ko_blogger_title_fix();
add_filter('the_title', array(&$ko_blogger_title_fix_instance, 'filter_title'),10,2);

?>