<?php
-# Copyright (C) 2004 Brion Vibber <brion@pobox.com>
-# http://www.mediawiki.org/
-#
-# This program 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.
-#
-# This program 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.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
-# http://www.gnu.org/copyleft/gpl.html
-
/**
+ * MySQL search engine
+ *
+ * Copyright (C) 2004 Brion Vibber <brion@pobox.com>
+ * http://www.mediawiki.org/
+ *
+ * This program 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.
+ *
+ * This program 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
* @file
* @ingroup Search
*/
*/
class SearchMySQL extends SearchEngine {
var $strictMatching = true;
+ static $mMinSearchLength;
- /** @todo document */
+ /**
+ * Creates an instance of this class
+ * @param $db DatabaseMysql: database object
+ */
function __construct( $db ) {
- $this->db = $db;
+ parent::__construct( $db );
}
/**
* Parse the user's query and transform it into an SQL fragment which will
* become part of a WHERE clause
+ *
+ * @param $filteredText string
+ * @param $fullText string
+ *
+ * @return string
*/
function parseQuery( $filteredText, $fulltext ) {
global $wgContLang;
$searchon = '';
$this->searchTerms = array();
- # FIXME: This doesn't handle parenthetical expressions.
+ # @todo FIXME: This doesn't handle parenthetical expressions.
$m = array();
if( preg_match_all( '/([-+<>~]?)(([' . $lc . ']+)(\*?)|"[^"]*")/',
$filteredText, $m, PREG_SET_ORDER ) ) {
foreach( $m as $bits ) {
@list( /* all */, $modifier, $term, $nonQuoted, $wildcard ) = $bits;
-
+
if( $nonQuoted != '' ) {
$term = $nonQuoted;
$quote = '';
$term = str_replace( '"', '', $term );
$quote = '"';
}
-
+
if( $searchon !== '' ) $searchon .= ' ';
if( $this->strictMatching && ($modifier == '') ) {
// If we leave this out, boolean op defaults to OR which is rarely helpful.
$modifier = '+';
}
-
+
// Some languages such as Serbian store the input form in the search index,
// so we may need to search for matches in multiple writing system variants.
$convertedVariants = $wgContLang->autoConvertToAllVariants( $term );
} else {
$variants = array( $term );
}
-
+
// The low-level search index does some processing on input to work
// around problems with minimum lengths and encoding in MySQL's
// fulltext engine.
// For Chinese this also inserts spaces between adjacent Han characters.
$strippedVariants = array_map(
- array( $wgContLang, 'stripForSearch' ),
+ array( $wgContLang, 'normalizeForSearch' ),
$variants );
-
+
// Some languages such as Chinese force all variants to a canonical
// form when stripping to the low-level search index, so to be sure
// let's check our variants list for unique items after stripping.
$strippedVariants = array_unique( $strippedVariants );
-
+
$searchon .= $modifier;
if( count( $strippedVariants) > 1 )
$searchon .= '(';
foreach( $strippedVariants as $stripped ) {
+ $stripped = $this->normalizeText( $stripped );
if( $nonQuoted && strpos( $stripped, ' ' ) !== false ) {
// Hack for Chinese: we need to toss in quotes for
- // multiple-character phrases since stripForSearch()
+ // multiple-character phrases since normalizeForSearch()
// added spaces between them to make word breaks.
$stripped = '"' . trim( $stripped ) . '"';
}
}
if( count( $strippedVariants) > 1 )
$searchon .= ')';
-
+
// Match individual terms or quoted phrase in result highlighting...
// Note that variants will be introduced in a later stage for highlighting!
$regexp = $this->regexTerm( $term, $wildcard );
$field = $this->getIndexField( $fulltext );
return " MATCH($field) AGAINST('$searchon' IN BOOLEAN MODE) ";
}
-
+
function regexTerm( $string, $wildcard ) {
global $wgContLang;
-
+
$regex = preg_quote( $string, '/' );
if( $wgContLang->hasWordBreaks() ) {
if( $wildcard ) {
function searchTitle( $term ) {
return $this->searchInternal( $term, false );
}
-
+
protected function searchInternal( $term, $fulltext ) {
- global $wgSearchMySQLTotalHits;
-
+ global $wgCountTotalSearchHits;
+
+ // This seems out of place, why is this called with empty term?
+ if ( trim( $term ) === '' ) return null;
+
$filteredTerm = $this->filter( $term );
- $resultSet = $this->db->query( $this->getQuery( $filteredTerm, $fulltext ) );
-
+ $query = $this->getQuery( $filteredTerm, $fulltext );
+ $resultSet = $this->db->select(
+ $query['tables'], $query['fields'], $query['conds'],
+ __METHOD__, $query['options'], $query['joins']
+ );
+
$total = null;
- if( $wgSearchMySQLTotalHits ) {
- $totalResult = $this->db->query( $this->getCountQuery( $filteredTerm, $fulltext ) );
+ if( $wgCountTotalSearchHits ) {
+ $query = $this->getCountQuery( $filteredTerm, $fulltext );
+ $totalResult = $this->db->select(
+ $query['tables'], $query['fields'], $query['conds'],
+ __METHOD__, $query['options'], $query['joins']
+ );
+
$row = $totalResult->fetchObject();
if( $row ) {
$total = intval( $row->c );
}
$totalResult->free();
}
-
+
return new MySQLSearchResultSet( $resultSet, $this->searchTerms, $total );
}
-
- /**
- * Return a partial WHERE clause to exclude redirects, if so set
- * @return String
- */
- function queryRedirect() {
- if( $this->showRedirects ) {
- return '';
- } else {
- return 'AND page_is_redirect=0';
+ public function supports( $feature ) {
+ switch( $feature ) {
+ case 'list-redirects':
+ case 'title-suffix-filter':
+ return true;
+ default:
+ return false;
}
}
/**
- * Return a partial WHERE clause to limit the search to the given namespaces
- * @return String
+ * Add special conditions
+ * @param $query Array
+ * @since 1.18
*/
- function queryNamespaces() {
- if( is_null($this->namespaces) )
- return ''; # search all
- if ( !count( $this->namespaces ) ) {
- $namespaces = '0';
- } else {
- $namespaces = $this->db->makeList( $this->namespaces );
+ protected function queryFeatures( &$query ) {
+ foreach ( $this->features as $feature => $value ) {
+ if ( $feature === 'list-redirects' && !$value ) {
+ $query['conds']['page_is_redirect'] = 0;
+ } elseif( $feature === 'title-suffix-filter' && $value ) {
+ $query['conds'][] = 'page_title' . $this->db->buildLike( $this->db->anyString(), $value );
+ }
}
- return 'AND page_namespace IN (' . $namespaces . ')';
}
/**
- * Return a LIMIT clause to limit results on the query.
- * @return String
+ * Add namespace conditions
+ * @param $query Array
+ * @since 1.18 (changed)
*/
- function queryLimit() {
- return $this->db->limitResult( '', $this->limit, $this->offset );
+ function queryNamespaces( &$query ) {
+ if ( is_array( $this->namespaces ) ) {
+ if ( count( $this->namespaces ) === 0 ) {
+ $this->namespaces[] = '0';
+ }
+ $query['conds']['page_namespace'] = $this->namespaces;
+ }
}
/**
- * Does not do anything for generic search engine
- * subclasses may define this though
- * @return String
+ * Add limit options
+ * @param $query Array
+ * @since 1.18
*/
- function queryRanking( $filteredTerm, $fulltext ) {
- return '';
+ protected function limitResult( &$query ) {
+ $query['options']['LIMIT'] = $this->limit;
+ $query['options']['OFFSET'] = $this->offset;
}
/**
- * Construct the full SQL query to do the search.
+ * Construct the SQL query to do the search.
* The guts shoulds be constructed in queryMain()
* @param $filteredTerm String
* @param $fulltext Boolean
+ * @return Array
+ * @since 1.18 (changed)
*/
function getQuery( $filteredTerm, $fulltext ) {
- return $this->queryMain( $filteredTerm, $fulltext ) . ' ' .
- $this->queryRedirect() . ' ' .
- $this->queryNamespaces() . ' ' .
- $this->queryRanking( $filteredTerm, $fulltext ) . ' ' .
- $this->queryLimit();
+ $query = array(
+ 'tables' => array(),
+ 'fields' => array(),
+ 'conds' => array(),
+ 'options' => array(),
+ 'joins' => array(),
+ );
+
+ $this->queryMain( $query, $filteredTerm, $fulltext );
+ $this->queryFeatures( $query );
+ $this->queryNamespaces( $query );
+ $this->limitResult( $query );
+
+ return $query;
}
-
+
/**
* Picks which field to index on, depending on what type of query.
* @param $fulltext Boolean
/**
* Get the base part of the search query.
- * The actual match syntax will depend on the server
- * version; MySQL 3 and MySQL 4 have different capabilities
- * in their fulltext search indexes.
*
* @param $filteredTerm String
* @param $fulltext Boolean
- * @return String
+ * @since 1.18 (changed)
*/
- function queryMain( $filteredTerm, $fulltext ) {
+ function queryMain( &$query, $filteredTerm, $fulltext ) {
$match = $this->parseQuery( $filteredTerm, $fulltext );
- $page = $this->db->tableName( 'page' );
- $searchindex = $this->db->tableName( 'searchindex' );
- return 'SELECT page_id, page_namespace, page_title ' .
- "FROM $page,$searchindex " .
- 'WHERE page_id=si_page AND ' . $match;
+ $query['tables'][] = 'page';
+ $query['tables'][] = 'searchindex';
+ $query['fields'][] = 'page_id';
+ $query['fields'][] = 'page_namespace';
+ $query['fields'][] = 'page_title';
+ $query['conds'][] = 'page_id=si_page';
+ $query['conds'][] = $match;
}
+ /**
+ * @since 1.18 (changed)
+ */
function getCountQuery( $filteredTerm, $fulltext ) {
$match = $this->parseQuery( $filteredTerm, $fulltext );
- $page = $this->db->tableName( 'page' );
- $searchindex = $this->db->tableName( 'searchindex' );
- return "SELECT COUNT(*) AS c " .
- "FROM $page,$searchindex " .
- 'WHERE page_id=si_page AND ' . $match .
- $this->queryRedirect() . ' ' .
- $this->queryNamespaces();
+
+ $query = array(
+ 'tables' => array( 'page', 'searchindex' ),
+ 'fields' => array( 'COUNT(*) as c' ),
+ 'conds' => array( 'page_id=si_page', $match ),
+ 'options' => array(),
+ 'joins' => array(),
+ );
+
+ $this->queryFeatures( $query );
+ $this->queryNamespaces( $query );
+
+ return $query;
}
/**
array( 'si_page' ),
array(
'si_page' => $id,
- 'si_title' => $title,
- 'si_text' => $text
+ 'si_title' => $this->normalizeText( $title ),
+ 'si_text' => $this->normalizeText( $text )
), __METHOD__ );
}
* @param $id Integer
* @param $title String
*/
- function updateTitle( $id, $title ) {
+ function updateTitle( $id, $title ) {
$dbw = wfGetDB( DB_MASTER );
$dbw->update( 'searchindex',
- array( 'si_title' => $title ),
+ array( 'si_title' => $this->normalizeText( $title ) ),
array( 'si_page' => $id ),
__METHOD__,
array( $dbw->lowPriorityOption() ) );
}
-}
-/**
- * @ingroup Search
- */
-class MySQLSearchResultSet extends SearchResultSet {
- function MySQLSearchResultSet( $resultSet, $terms, $totalHits=null ) {
- $this->mResultSet = $resultSet;
- $this->mTerms = $terms;
- $this->mTotalHits = $totalHits;
- }
+ /**
+ * Converts some characters for MySQL's indexing to grok it correctly,
+ * and pads short words to overcome limitations.
+ */
+ function normalizeText( $string ) {
+ global $wgContLang;
+
+ wfProfileIn( __METHOD__ );
+
+ $out = parent::normalizeText( $string );
+
+ // MySQL fulltext index doesn't grok utf-8, so we
+ // need to fold cases and convert to hex
+ $out = preg_replace_callback(
+ "/([\\xc0-\\xff][\\x80-\\xbf]*)/",
+ array( $this, 'stripForSearchCallback' ),
+ $wgContLang->lc( $out ) );
+
+ // And to add insult to injury, the default indexing
+ // ignores short words... Pad them so we can pass them
+ // through without reconfiguring the server...
+ $minLength = $this->minSearchLength();
+ if( $minLength > 1 ) {
+ $n = $minLength - 1;
+ $out = preg_replace(
+ "/\b(\w{1,$n})\b/",
+ "$1u800",
+ $out );
+ }
- function termMatches() {
- return $this->mTerms;
+ // Periods within things like hostnames and IP addresses
+ // are also important -- we want a search for "example.com"
+ // or "192.168.1.1" to work sanely.
+ //
+ // MySQL's search seems to ignore them, so you'd match on
+ // "example.wikipedia.com" and "192.168.83.1" as well.
+ $out = preg_replace(
+ "/(\w)\.(\w|\*)/u",
+ "$1u82e$2",
+ $out );
+
+ wfProfileOut( __METHOD__ );
+
+ return $out;
}
- function numRows() {
- return $this->mResultSet->numRows();
+ /**
+ * Armor a case-folded UTF-8 string to get through MySQL's
+ * fulltext search without being mucked up by funny charset
+ * settings or anything else of the sort.
+ */
+ protected function stripForSearchCallback( $matches ) {
+ return 'u8' . bin2hex( $matches[1] );
}
- function next() {
- $row = $this->mResultSet->fetchObject();
- if( $row === false ) {
- return false;
- } else {
- return new SearchResult( $row );
+ /**
+ * Check MySQL server's ft_min_word_len setting so we know
+ * if we need to pad short words...
+ *
+ * @return int
+ */
+ protected function minSearchLength() {
+ if( is_null( self::$mMinSearchLength ) ) {
+ $sql = "SHOW GLOBAL VARIABLES LIKE 'ft\\_min\\_word\\_len'";
+
+ $dbr = wfGetDB( DB_SLAVE );
+ $result = $dbr->query( $sql );
+ $row = $result->fetchObject();
+ $result->free();
+
+ if( $row && $row->Variable_name == 'ft_min_word_len' ) {
+ self::$mMinSearchLength = intval( $row->Value );
+ } else {
+ self::$mMinSearchLength = 0;
+ }
}
+ return self::$mMinSearchLength;
}
+}
- function free() {
- $this->mResultSet->free();
+/**
+ * @ingroup Search
+ */
+class MySQLSearchResultSet extends SqlSearchResultSet {
+ function __construct( $resultSet, $terms, $totalHits=null ) {
+ parent::__construct( $resultSet, $terms );
+ $this->mTotalHits = $totalHits;
}
-
function getTotalHits() {
return $this->mTotalHits;
}
-}
\ No newline at end of file
+}
dépôts / lhc / web / wiklou.git / blobdiff