903e8b63de
Non-breaking change. Remaining uses are public interfaces (a constant, two globals, a config sub-parameter, SQL queries, storage function names), one i18n message key, and a whole lot of maintenance scripts with calls to the deprecated function wfWaitForSlaves(). Change-Id: I6ee5ca92ccf6a80c08f53d9efe38ebb4b05064d7
108 lines
2.9 KiB
PHP
108 lines
2.9 KiB
PHP
<?php
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/**
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* Database search engine
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Search
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*/
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use Wikimedia\Rdbms\IDatabase;
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/**
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* Base search engine base class for database-backed searches
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* @ingroup Search
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* @since 1.23
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*/
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abstract class SearchDatabase extends SearchEngine {
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/**
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* @var IDatabase Replica database from which to read results
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*/
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protected $db;
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/**
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* @param IDatabase|null $db The database to search from
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*/
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public function __construct( IDatabase $db = null ) {
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if ( $db ) {
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$this->db = $db;
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} else {
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$this->db = wfGetDB( DB_REPLICA );
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}
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}
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/**
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* @param string $term
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* @return SearchResultSet|Status|null
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*/
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final public function doSearchText( $term ) {
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return $this->doSearchTextInDB( $this->extractNamespacePrefix( $term ) );
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}
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/**
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* Perform a full text search query and return a result set.
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*
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* @param string $term Raw search term
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* @return SqlSearchResultSet
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*/
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abstract protected function doSearchTextInDB( $term );
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/**
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* @param string $term
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* @return SearchResultSet|null
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*/
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final public function doSearchTitle( $term ) {
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return $this->doSearchTitleInDB( $this->extractNamespacePrefix( $term ) );
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}
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/**
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* Perform a title-only search query and return a result set.
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*
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* @param string $term Raw search term
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* @return SqlSearchResultSet
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*/
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abstract protected function doSearchTitleInDB( $term );
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/**
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* Return a 'cleaned up' search string
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*
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* @param string $text
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* @return string
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*/
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protected function filter( $text ) {
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// List of chars allowed in the search query.
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// This must include chars used in the search syntax.
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// Usually " (phrase) or * (wildcards) if supported by the engine
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$lc = $this->legalSearchChars( self::CHARS_ALL );
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return trim( preg_replace( "/[^{$lc}]/", " ", $text ) );
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}
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/**
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* Extract the optional namespace prefix and set self::namespaces
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* accordingly and return the query string
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* @param string $term
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* @return string the query string without any namespace prefix
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*/
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final protected function extractNamespacePrefix( $term ) {
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$queryAndNs = self::parseNamespacePrefixes( $term );
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if ( $queryAndNs === false ) {
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return $term;
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}
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$this->namespaces = $queryAndNs[1];
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return $queryAndNs[0];
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}
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}
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