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<?php
/**
*
* @package search
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @package search
* fulltext_mysql
* Search indexing for MySQL
*/
class fulltext_mysql
{
var $version = 4;
var $split_words = array();
var $common_words = array();
var $old_split_words = array();
function fulltext_mysql(&$error)
{
global $db;
$result = $db->sql_query('SELECT VERSION() AS mysql_version');
$version = ($row = $db->sql_fetchrow($result)) ? $row['mysql_version'] : '';
$db->sql_freeresult($result);
// Need to check for fulltext indexes ... maybe all of thise is best left in acp?
$error = (!preg_match('#^4|5|6#s', $version)) ? true : false;
}
function search($type, &$fields, &$terms, &$fid_ary, &$keywords, &$author, &$pid_ary, $sort_days)
{
global $phpbb_root_path, $phpEx, $config, $db, $user, $SID;
// Are we looking for words
if ($keywords)
{
$author = ($author) ? ' AND ' . $author : '';
$this->split_words = $this->common_words = array();
$drop_char_match = array('^', '$', ';', '#', '&', '(', ')', '<', '>', '`', '\'', '"', '|', ',', '@', '_', '?', '%', '~', '.', '[', ']', '{', '}', ':', '\\', '/', '=', '\'', '!', '*');
$drop_char_replace = array(' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '', '', ' ', ' ', ' ', ' ', '', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '' , ' ', ' ', ' ', ' ', ' ');
if ($fp = @fopen($user->lang_path . '/search_stopwords.txt', 'rb'))
{
$stopwords = explode("\n", str_replace("\r\n", "\n", fread($fp, filesize($user->lang_path . '/search_stopwords.txt'))));
}
fclose($fp);
if ($fp = @fopen($user->lang_path . '/search_synonyms.txt', 'rb'))
{
preg_match_all('#^(.*?) (.*?)$#ms', fread($fp, filesize($user->lang_path . '/search_synonyms.txt')), $match);
$replace_synonym = &$match[1];
$match_synonym = &$match[2];
}
fclose($fp);
$match = array('#\sand\s#i', '#\sor\s#i', '#\snot\s#i', '#\+#', '#-#', '#\|#');
$replace = array(' +', ' |', ' -', ' +', ' -', ' |');
$keywords = preg_replace($match, $replace, $keywords);
$match = array();
// Comments for hardcoded bbcode elements (urls, smilies, html)
$match[] = '#<!\-\- .* \-\->(.*?)<!\-\- .* \-\->#is';
// New lines, carriage returns
$match[] = "#[\n\r]+#";
// NCRs like etc.
$match[] = '#(&|&)[\#a-z0-9]+?;#i';
// BBcode
$match[] = '#\[\/?[a-z\*\+\-]+(=.*)?(\:?[0-9a-z]{5,})\]#';
// Filter out as above
$keywords = preg_replace($match, ' ', strtolower(trim($keywords)));
$keywords = str_replace($drop_char_match, $drop_char_replace, $keywords);
// Split words
$this->split_words = explode(' ', preg_replace('#\s+#', ' ', $keywords));
if (sizeof($stopwords))
{
$this->common_words = array_intersect($this->split_words, $stopwords);
$this->split_words = array_diff($this->split_words, $stopwords);
}
if (sizeof($replace_synonym))
{
$this->split_words = str_replace($replace_synonym, $match_synonym, $this->split_words);
}
}
if ($this->old_split_words && sizeof($this->old_split_words))
{
$this->split_words = (sizeof($this->split_words)) ? array_diff($this->split_words, $this->old_split_words) : $this->old_split_words;
}
if (sizeof($this->split_words))
{
// Build some display specific variable strings
$sql_select = ($type == 'posts') ? 'p.post_id' : 'DISTINCT t.topic_id';
$sql_from = ($type == 'posts') ? '' : TOPICS_TABLE . ' t, ';
$sql_fora = (sizeof($fid_ary)) ? ' AND p.forum_id IN (' . implode(',', $fid_ary) . ')' : '';
$sql_author = ($author) ? 'AND p.poster_id = ' . $author : '';
$sql_time = ($sort_days) ? 'AND p.post_time >= ' . ($current_time - ($sort_days * 86400)) : '';
$sql_topic = ($type == 'posts') ? '' : 'AND t.topic_id = p.topic_id';
switch ($fields)
{
case 'titleonly':
$sql_match = 'p.post_subject';
break;
case 'msgonly':
$sql_match = 'p.post_text';
break;
default:
$sql_match = 'p.post_text, p.post_subject';
}
// Are we searching within an existing search set? Yes, then include the old ids
$sql_find_in = (sizeof($pid_ary)) ? 'AND ' . (($type == 'topics') ? 't.topic_id' : 'p.post_id') . ' IN (' . implode(', ', $pid_ary) . ')' : '';
$words = array();
if ($terms == 'all')
{
foreach ($this->split_words as $id => $word)
{
$words[] = (strpos($word, '+') === 0) ? $word : '+' . $word;
}
}
else
{
$words = $this->split_words;
}
$sql = "SELECT $sql_select
FROM $sql_from" . POSTS_TABLE . " p
WHERE MATCH ($sql_match) AGAINST ('" . implode(' ', $words) . "' IN BOOLEAN MODE)
$sql_topic
$sql_find_in
$sql_fora
$sql_author
$sql_time";
$result = $db->sql_query_limit($sql, 1000);
if ($db->sql_numrows() > 999)
{
trigger_error($user->lang['TOO_MANY_SEARCH_RESULTS']);
}
$pid_ary = array();
while ($row = $db->sql_fetchrow($result))
{
$pid_ary[] = ($type == 'topics') ? $row['topic_id'] : $row['post_id'];
}
$db->sql_freeresult($result);
$pid_ary = array_unique($pid_ary);
if (!sizeof($pid_ary))
{
trigger_error($user->lang['NO_SEARCH_RESULTS']);
}
}
else if ($author)
{
$sql_author = ($author) ? 'p.poster_id = ' . $author : '';
$sql_fora = (sizeof($fid_ary)) ? ' AND p.forum_id IN (' . implode(',', $fid_ary) . ')' : '';
if ($type == 'posts')
{
$sql = 'SELECT p.post_id
FROM ' . POSTS_TABLE . " p
WHERE $sql_author
$sql_fora";
$field = 'post_id';
}
else
{
$sql = 'SELECT t.topic_id
FROM ' . TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
WHERE $sql_author
$sql_fora
AND t.topic_id = p.topic_id
GROUP BY t.topic_id";
$field = 'topic_id';
}
$result = $db->sql_query_limit($sql, 1000);
while ($row = $db->sql_fetchrow($result))
{
$pid_ary[] = $row[$field];
}
$db->sql_freeresult($result);
}
return false;
}
}
?>
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