--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/punbb/include/search_idx.php Sun Apr 06 00:28:50 2008 -0400
@@ -0,0 +1,231 @@
+<?php
+/***********************************************************************
+
+ Copyright (C) 2002-2008 PunBB.org
+
+ This file is part of PunBB.
+
+ PunBB is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ PunBB is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ MA 02111-1307 USA
+
+************************************************************************/
+
+
+// The contents of this file are very much inspired by the file functions_search.php
+// from the phpBB Group forum software phpBB2 (http://www.phpbb.com).
+
+
+// Make sure no one attempts to run this script "directly"
+if (!defined('PUN'))
+ exit;
+
+
+//
+// "Cleans up" a text string and returns an array of unique words
+// This function depends on the current locale setting
+//
+function split_words($text)
+{
+ global $pun_user;
+ static $noise_match, $noise_replace, $stopwords;
+
+ if (empty($noise_match))
+ {
+ $noise_match = array('[quote', '[code', '[url', '[img', '[email', '[color', '[colour', 'quote]', 'code]', 'url]', 'img]', 'email]', 'color]', 'colour]', '^', '$', '&', '(', ')', '<', '>', '`', '\'', '"', '|', ',', '@', '_', '?', '%', '~', '+', '[', ']', '{', '}', ':', '\\', '/', '=', '#', ';', '!', '*');
+ $noise_replace = array('', '', '', '', '', '', '', '', '', '', '', '', '', '', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '', '', ' ', ' ', ' ', ' ', '', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '' , ' ', ' ', ' ', ' ', ' ', ' ');
+
+ $stopwords = (array)@file(PUN_ROOT.'lang/'.$pun_user['language'].'/stopwords.txt');
+ $stopwords = array_map('trim', $stopwords);
+ }
+
+ // Clean up
+ $patterns[] = '#&[\#a-z0-9]+?;#i';
+ $patterns[] = '#\b[\w]+:\/\/[a-z0-9\.\-]+(\/[a-z0-9\?\.%_\-\+=&\/~]+)?#';
+ $patterns[] = '#\[\/?[a-z\*=\+\-]+(\:?[0-9a-z]+)?:[a-z0-9]{10,}(\:[a-z0-9]+)?=?.*?\]#';
+ $text = preg_replace($patterns, ' ', ' '.strtolower($text).' ');
+
+ // Filter out junk
+ $text = str_replace($noise_match, $noise_replace, $text);
+
+ // Strip out extra whitespace between words
+ $text = trim(preg_replace('#\s+#', ' ', $text));
+
+ // Fill an array with all the words
+ $words = explode(' ', $text);
+
+ if (!empty($words))
+ {
+ while (list($i, $word) = @each($words))
+ {
+ $words[$i] = trim($word, '.');
+ $num_chars = pun_strlen($word);
+
+ if ($num_chars < 3 || $num_chars > 20 || in_array($words[$i], $stopwords))
+ unset($words[$i]);
+ }
+ }
+
+ return array_unique($words);
+}
+
+
+//
+// Updates the search index with the contents of $post_id (and $subject)
+//
+function update_search_index($mode, $post_id, $message, $subject = null)
+{
+ global $db_type, $pun_db;
+
+ // Split old and new post/subject to obtain array of 'words'
+ $words_message = split_words($message);
+ $words_subject = ($subject) ? split_words($subject) : array();
+
+ if ($mode == 'edit')
+ {
+ $result = $pun_db->query('SELECT w.id, w.word, m.subject_match FROM '.$pun_db->prefix.'search_words AS w INNER JOIN '.$pun_db->prefix.'search_matches AS m ON w.id=m.word_id WHERE m.post_id='.$post_id, true) or error(__FILE__, __LINE__);
+
+ // Declare here to stop array_keys() and array_diff() from complaining if not set
+ $cur_words['post'] = array();
+ $cur_words['subject'] = array();
+
+ while ($row = $pun_db->fetch_row($result))
+ {
+ $match_in = ($row[2]) ? 'subject' : 'post';
+ $cur_words[$match_in][$row[1]] = $row[0];
+ }
+
+ $pun_db->free_result($result);
+
+ $words['add']['post'] = array_diff($words_message, array_keys($cur_words['post']));
+ $words['add']['subject'] = array_diff($words_subject, array_keys($cur_words['subject']));
+ $words['del']['post'] = array_diff(array_keys($cur_words['post']), $words_message);
+ $words['del']['subject'] = array_diff(array_keys($cur_words['subject']), $words_subject);
+ }
+ else
+ {
+ $words['add']['post'] = $words_message;
+ $words['add']['subject'] = $words_subject;
+ $words['del']['post'] = array();
+ $words['del']['subject'] = array();
+ }
+
+ unset($words_message);
+ unset($words_subject);
+
+ // Get unique words from the above arrays
+ $unique_words = array_unique(array_merge($words['add']['post'], $words['add']['subject']));
+
+ if (!empty($unique_words))
+ {
+ $result = $pun_db->query('SELECT id, word FROM '.$pun_db->prefix.'search_words WHERE word IN('.implode(',', preg_replace('#^(.*)$#', '\'\1\'', $unique_words)).')', true) or error(__FILE__, __LINE__);
+
+ $word_ids = array();
+ while ($row = $pun_db->fetch_row($result))
+ $word_ids[$row[1]] = $row[0];
+
+ $pun_db->free_result($result);
+
+ $new_words = array_diff($unique_words, array_keys($word_ids));
+ unset($unique_words);
+
+ if (!empty($new_words))
+ {
+ switch ($db_type)
+ {
+ case 'mysql':
+ case 'mysqli':
+ $pun_db->query('INSERT INTO '.$pun_db->prefix.'search_words (word) VALUES'.implode(',', preg_replace('#^(.*)$#', '(\'\1\')', $new_words))) or error(__FILE__, __LINE__);
+ break;
+
+ default:
+ while (list(, $word) = @each($new_words))
+ $pun_db->query('INSERT INTO '.$pun_db->prefix.'search_words (word) VALUES(\''.$word.'\')') or error(__FILE__, __LINE__);
+ break;
+ }
+ }
+
+ unset($new_words);
+ }
+
+ // Delete matches (only if editing a post)
+ while (list($match_in, $wordlist) = @each($words['del']))
+ {
+ $subject_match = ($match_in == 'subject') ? 1 : 0;
+
+ if (!empty($wordlist))
+ {
+ $sql = '';
+ while (list(, $word) = @each($wordlist))
+ $sql .= (($sql != '') ? ',' : '').$cur_words[$match_in][$word];
+
+ $pun_db->query('DELETE FROM '.$pun_db->prefix.'search_matches WHERE word_id IN('.$sql.') AND post_id='.$post_id.' AND subject_match='.$subject_match) or error(__FILE__, __LINE__);
+ }
+ }
+
+ // Add new matches
+ while (list($match_in, $wordlist) = @each($words['add']))
+ {
+ $subject_match = ($match_in == 'subject') ? 1 : 0;
+
+ if (!empty($wordlist))
+ $pun_db->query('INSERT INTO '.$pun_db->prefix.'search_matches (post_id, word_id, subject_match) SELECT '.$post_id.', id, '.$subject_match.' FROM '.$pun_db->prefix.'search_words WHERE word IN('.implode(',', preg_replace('#^(.*)$#', '\'\1\'', $wordlist)).')') or error(__FILE__, __LINE__);
+ }
+
+ unset($words);
+}
+
+
+//
+// Strip search index of indexed words in $post_ids
+//
+function strip_search_index($post_ids)
+{
+ global $db_type, $pun_db;
+
+ switch ($db_type)
+ {
+ case 'mysql':
+ case 'mysqli':
+ {
+ $result = $pun_db->query('SELECT word_id FROM '.$pun_db->prefix.'search_matches WHERE post_id IN('.$post_ids.') GROUP BY word_id') or error(__FILE__, __LINE__);
+
+ if ($pun_db->num_rows($result))
+ {
+ $word_ids = '';
+ while ($row = $pun_db->fetch_row($result))
+ $word_ids .= ($word_ids != '') ? ','.$row[0] : $row[0];
+
+ $result = $pun_db->query('SELECT word_id FROM '.$pun_db->prefix.'search_matches WHERE word_id IN('.$word_ids.') GROUP BY word_id HAVING COUNT(word_id)=1') or error(__FILE__, __LINE__);
+
+ if ($pun_db->num_rows($result))
+ {
+ $word_ids = '';
+ while ($row = $pun_db->fetch_row($result))
+ $word_ids .= ($word_ids != '') ? ','.$row[0] : $row[0];
+
+ $pun_db->query('DELETE FROM '.$pun_db->prefix.'search_words WHERE id IN('.$word_ids.')') or error(__FILE__, __LINE__);
+ }
+ }
+
+ break;
+ }
+
+ default:
+ $pun_db->query('DELETE FROM '.$pun_db->prefix.'search_words WHERE id IN(SELECT word_id FROM '.$pun_db->prefix.'search_matches WHERE word_id IN(SELECT word_id FROM '.$pun_db->prefix.'search_matches WHERE post_id IN('.$post_ids.') GROUP BY word_id) GROUP BY word_id HAVING COUNT(word_id)=1)') or error(__FILE__, __LINE__);
+ break;
+ }
+
+ $pun_db->query('DELETE FROM '.$pun_db->prefix.'search_matches WHERE post_id IN('.$post_ids.')') or error(__FILE__, __LINE__);
+}