Current File : /home/admin/public_html/old/happyezystyle/board/Sources/SearchAPI-Fulltext.php
<?php
/**********************************************************************************
* SearchAPI-Fulltext.php *
***********************************************************************************
* SMF: Simple Machines Forum *
* Open-Source Project Inspired by Zef Hemel (zef@zefhemel.com) *
* =============================================================================== *
* Software Version: SMF 2.0 RC1 *
* Software by: Simple Machines (http://www.simplemachines.org) *
* Copyright 2006-2009 by: Simple Machines LLC (http://www.simplemachines.org) *
* 2001-2006 by: Lewis Media (http://www.lewismedia.com) *
* Support, News, Updates at: http://www.simplemachines.org *
***********************************************************************************
* This program is free software; you may redistribute it and/or modify it under *
* the terms of the provided license as published by Simple Machines LLC. *
* *
* This program is distributed in the hope that it is and will be useful, but *
* WITHOUT ANY WARRANTIES; without even any implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. *
* *
* See the "license.txt" file for details of the Simple Machines license. *
* The latest version can always be found at http://www.simplemachines.org. *
**********************************************************************************/
if (!defined('SMF'))
die('Hacking attempt...');
/*
int searchSort(string $wordA, string $wordB)
- callback function for usort used to sort the fulltext results.
- the order of sorting is: large words, small words, large words that
are excluded from the search, small words that are excluded.
*/
class fulltext_search
{
// This is the last version of SMF that this was tested on, to protect against API changes.
public $version_compatible = 'SMF 2.0 RC1';
// This won't work with versions of SMF less than this.
public $min_smf_version = 'SMF 2.0 Beta 2';
// Is it supported?
public $is_supported = true;
// Can we do a boolean search - tested on construct.
protected $canDoBooleanSearch = false;
// What words are banned?
protected $bannedWords = array();
// What is the minimum word length?
protected $min_word_length = 4;
// What databases support the fulltext index?
protected $supported_databases = array('mysql');
public function __construct()
{
global $smcFunc, $db_connection, $modSettings, $db_type;
// Is this database supported?
if (!in_array($db_type, $this->supported_databases))
{
$this->is_supported = false;
return;
}
// Some MySQL versions are superior to others :P.
$this->canDoBooleanSearch = version_compare($smcFunc['db_server_info']($db_connection), '4.0.1', '>=') == 1;
$this->bannedWords = empty($modSettings['search_banned_words']) ? array() : explode(',', $modSettings['search_banned_words']);
$this->min_word_length = $this->_getMinWordLength();
}
// Check whether the method can be performed by this API.
public function supportsMethod($methodName, $query_params = null)
{
switch ($methodName)
{
case 'searchSort':
case 'prepareIndexes':
case 'indexedWordQuery':
return true;
break;
default:
return false;
break;
}
}
// What is the minimum word length full text supports?
protected function _getMinWordLength()
{
global $smcFunc;
// Try to determine the minimum number of letters for a fulltext search.
$request = $smcFunc['db_search_query']('max_fulltext_length', '
SHOW VARIABLES
LIKE {string:fulltext_minimum_word_length}',
array(
'fulltext_minimum_word_length' => 'ft_min_word_len',
)
);
if ($request !== false && $smcFunc['db_num_rows']($request) == 1)
{
list (, $min_word_length) = $smcFunc['db_fetch_row']($request);
$smcFunc['db_free_result']($request);
}
// 4 is the MySQL default...
else
$min_word_length = 4;
return $min_word_length;
}
// This function compares the length of two strings plus a little.
public function searchSort($a, $b)
{
global $modSettings, $excludedWords;
$x = strlen($a) - (in_array($a, $excludedWords) ? 1000 : 0);
$y = strlen($b) - (in_array($b, $excludedWords) ? 1000 : 0);
return $x < $y ? 1 : ($x > $y ? -1 : 0);
}
// Do we have to do some work with the words we are searching for to prepare them?
public function prepareIndexes($word, &$wordsSearch, &$wordsExclude, $isExcluded)
{
global $modSettings;
$subwords = text2words($word, null, false);
if (!$this->canDoBooleanSearch && count($subwords) > 1 && empty($modSettings['search_force_index']))
$wordsSearch['words'][] = $word;
if ($this->canDoBooleanSearch)
{
$fulltextWord = count($subwords) === 1 ? $word : '"' . $word . '"';
$wordsSearch['indexed_words'][] = $fulltextWord;
if ($isExcluded)
$wordsExclude[] = $fulltextWord;
}
// Excluded phrases don't benefit from being split into subwords.
elseif (count($subwords) > 1 && $isExcluded)
return;
else
{
$relyOnIndex = true;
foreach ($subwords as $subword)
{
if ((strlen($subword) >= $this->min_word_length) && !in_array($subword, $this->bannedWords))
{
$wordsSearch['indexed_words'][] = $subword;
if ($isExcluded)
$wordsExclude[] = $subword;
}
elseif (!in_array($subword, $this->bannedWords))
$relyOnIndex = false;
}
if ($this->canDoBooleanSearch && !$relyOnIndex && empty($modSettings['search_force_index']))
$wordsSearch['words'][] = $word;
}
}
// Search for indexed words.
public function indexedWordQuery($words, $search_data)
{
global $modSettings, $smcFunc;
$query_select = array(
'id_msg' => 'm.id_msg',
);
$query_where = array();
$query_params = $search_data['params'];
if ($query_params['id_search'])
$query_select['id_search'] = '{int:id_search}';
$count = 0;
if (empty($modSettings['search_simple_fulltext']))
foreach ($words['words'] as $regularWord)
{
$query_where[] = 'm.body' . (in_array($regularWord, $query_params['excluded_words']) ? ' NOT' : '') . (empty($modSettings['search_match_words']) || $no_regexp ? ' LIKE ' : 'RLIKE') . '{string:complex_body_' . $count . '}';
$query_params['complex_body_' . $count++] = empty($modSettings['search_match_words']) || $no_regexp ? '%' . strtr($regularWord, array('_' => '\\_', '%' => '\\%')) . '%' : '[[:<:]]' . addcslashes(preg_replace(array('/([\[\]$.+*?|{}()])/'), array('[$1]'), $regularWord), '\\\'') . '[[:>:]]';
}
if ($query_params['user_query'])
$query_where[] = '{raw:user_query}';
if ($query_params['board_query'])
$query_where[] = 'm.id_board {raw:board_query}';
if ($query_params['topic'])
$query_where[] = 'm.id_topic = {int:topic}';
if ($query_params['min_msg_id'])
$query_where[] = 'm.id_msg >= {int:min_msg_id}';
if ($query_params['max_msg_id'])
$query_where[] = 'm.id_msg <= {int:max_msg_id}';
$count = 0;
if (!empty($query_params['excluded_phrases']) && empty($modSettings['search_force_index']))
foreach ($query_params['excluded_phrases'] as $phrase)
{
$query_where[] = 'subject NOT ' . (empty($modSettings['search_match_words']) || $no_regexp ? ' LIKE ' : 'RLIKE') . '{string:exclude_subject_phrase_' . $count . '}';
$query_params['exclude_subject_phrase_' . $count++] = empty($modSettings['search_match_words']) || $no_regexp ? '%' . strtr($phrase, array('_' => '\\_', '%' => '\\%')) . '%' : '[[:<:]]' . addcslashes(preg_replace(array('/([\[\]$.+*?|{}()])/'), array('[$1]'), $phrase), '\\\'') . '[[:>:]]';
}
$count = 0;
if (!empty($query_params['excluded_subject_words']) && empty($modSettings['search_force_index']))
foreach ($query_params['excluded_subject_words'] as $excludedWord)
{
$query_where[] = 'subject NOT ' . (empty($modSettings['search_match_words']) || $no_regexp ? ' LIKE ' : 'RLIKE') . '{string:exclude_subject_words_' . $count . '}';
$query_params['exclude_subject_words_' . $count++] = empty($modSettings['search_match_words']) || $no_regexp ? '%' . strtr($excludedWord, array('_' => '\\_', '%' => '\\%')) . '%' : '[[:<:]]' . addcslashes(preg_replace(array('/([\[\]$.+*?|{}()])/'), array('[$1]'), $excludedWord), '\\\'') . '[[:>:]]';
}
if (!empty($modSettings['search_simple_fulltext']))
{
$query_where[] = 'MATCH (body) AGAINST ({string:body_match})';
$query_params['body_match'] = implode(' ', array_diff($words['indexed_words'], $query_params['excluded_index_words']));
}
elseif ($this->canDoBooleanSearch)
{
$query_params['boolean_match'] = '';
foreach ($words['indexed_words'] as $fulltextWord)
$query_params['boolean_match'] .= (in_array($fulltextWord, $query_params['excluded_index_words']) ? '-' : '+') . $fulltextWord . ' ';
$query_params['boolean_match'] = substr($query_params['boolean_match'], 0, -1);
$query_where[] = 'MATCH (body) AGAINST ({string:boolean_match} IN BOOLEAN MODE)';
}
else
{
$count = 0;
foreach ($words['indexed_words'] as $fulltextWord)
{
$query_where[] = (in_array($fulltextWord, $query_params['excluded_index_words']) ? 'NOT ' : '') . 'MATCH (body) AGAINST ({string:fulltext_match_' . $count . '})';
$query_params['fulltext_match_' . $count++] = $fulltextWord;
}
}
$ignoreRequest = $smcFunc['db_search_query']('insert_into_log_messages_fulltext', ($smcFunc['db_support_ignore'] ? ( '
INSERT IGNORE INTO {db_prefix}' . $search_data['insert_into'] . '
(' . implode(', ', array_keys($query_select)) . ')') : '') . '
SELECT ' . implode(', ', $query_select) . '
FROM {db_prefix}messages AS m
WHERE ' . implode('
AND ', $query_where) . (empty($search_data['max_results']) ? '' : '
LIMIT ' . ($search_data['max_results'] - $search_data['indexed_results'])),
$query_params
);
return $ignoreRequest;
}
}
?>