update to MediaWiki 1.17.0

1 files changed, 254 insertions, 0 deletions

diff --git a/includes/search/SearchMssql.php b/includes/search/SearchMssql.php
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+<?php
+/**
+ * Mssql search engine
+ *
+ * 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
+ */
+
+/**
+ * Search engine hook base class for Mssql (ConText).
+ * @ingroup Search
+ */
+class SearchMssql extends SearchEngine {
+
+	/**
+	 * Creates an instance of this class
+	 * @param $db DatabaseMssql: database object
+	 */
+	function __construct( $db ) {
+		parent::__construct( $db );
+	}
+
+	/**
+	 * Perform a full text search query and return a result set.
+	 *
+	 * @param $term String: raw search term
+	 * @return MssqlSearchResultSet
+	 * @access public
+	 */
+	function searchText( $term ) {
+		$resultSet = $this->db->resultObject( $this->db->query( $this->getQuery( $this->filter( $term ), true ) ) );
+		return new MssqlSearchResultSet( $resultSet, $this->searchTerms );
+	}
+
+	/**
+	 * Perform a title-only search query and return a result set.
+	 *
+	 * @param $term String: raw search term
+	 * @return MssqlSearchResultSet
+	 * @access public
+	 */
+	function searchTitle( $term ) {
+		$resultSet = $this->db->resultObject( $this->db->query( $this->getQuery( $this->filter( $term ), false ) ) );
+		return new MssqlSearchResultSet( $resultSet, $this->searchTerms );
+	}
+
+
+	/**
+	 * Return a partial WHERE clause to exclude redirects, if so set
+	 *
+	 * @return String
+	 * @private
+	 */
+	function queryRedirect() {
+		if ( $this->showRedirects ) {
+			return '';
+		} else {
+			return 'AND page_is_redirect=0';
+		}
+	}
+
+	/**
+	 * Return a partial WHERE clause to limit the search to the given namespaces
+	 *
+	 * @return String
+	 * @private                           
+	 */
+	function queryNamespaces() {
+		$namespaces = implode( ',', $this->namespaces );
+		if ( $namespaces == '' ) {
+			$namespaces = '0';
+		}
+		return 'AND page_namespace IN (' . $namespaces . ')';
+	}
+
+	/**
+	 * Return a LIMIT clause to limit results on the query.
+	 *
+	 * @return String
+	 * @private
+	 */
+	function queryLimit( $sql ) {
+		return $this->db->limitResult( $sql, $this->limit, $this->offset );
+	}
+
+	/**
+	 * Does not do anything for generic search engine
+	 * subclasses may define this though
+	 *
+	 * @return String
+	 * @private
+	 */
+	function queryRanking( $filteredTerm, $fulltext ) {
+		return ' ORDER BY ftindex.[RANK] DESC'; // return ' ORDER BY score(1)';
+	}
+
+	/**
+	 * Construct the full SQL query to do the search.
+	 * The guts shoulds be constructed in queryMain()
+	 *
+	 * @param $filteredTerm String
+	 * @param $fulltext Boolean
+	 * @private
+	 */
+	function getQuery( $filteredTerm, $fulltext ) {
+		return $this->queryLimit( $this->queryMain( $filteredTerm, $fulltext ) . ' ' .
+			$this->queryRedirect() . ' ' .
+			$this->queryNamespaces() . ' ' .
+			$this->queryRanking( $filteredTerm, $fulltext ) . ' ' );
+	}
+
+
+	/**
+	 * Picks which field to index on, depending on what type of query.
+	 *
+	 * @param $fulltext Boolean
+	 * @return string
+	 */
+	function getIndexField( $fulltext ) {
+		return $fulltext ? 'si_text' : 'si_title';
+	}
+
+	/**
+	 * Get the base part of the search query.
+	 *
+	 * @param $filteredTerm String
+	 * @param $fulltext Boolean
+	 * @return String
+	 * @private
+	 */
+	function queryMain( $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, ftindex.[RANK]' .
+			"FROM $page,FREETEXTTABLE($searchindex , $match, LANGUAGE 'English') as ftindex " .
+			'WHERE page_id=ftindex.[KEY] ';
+	}
+
+	/** @todo document */
+	function parseQuery( $filteredText, $fulltext ) {
+		global $wgContLang;
+		$lc = SearchEngine::legalSearchChars();
+		$this->searchTerms = array();
+
+		# FIXME: This doesn't handle parenthetical expressions.
+		$m = array();
+		$q = array();
+
+		if ( preg_match_all( '/([-+<>~]?)(([' . $lc . ']+)(\*?)|"[^"]*")/',
+			$filteredText, $m, PREG_SET_ORDER ) ) {
+			foreach ( $m as $terms ) {
+				$q[] = $terms[1] . $wgContLang->normalizeForSearch( $terms[2] );
+
+				if ( !empty( $terms[3] ) ) {
+					$regexp = preg_quote( $terms[3], '/' );
+					if ( $terms[4] )
+						$regexp .= "[0-9A-Za-z_]+";
+				} else {
+					$regexp = preg_quote( str_replace( '"', '', $terms[2] ), '/' );
+				}
+				$this->searchTerms[] = $regexp;
+			}
+		}
+
+		$searchon = $this->db->strencode( join( ',', $q ) );
+		$field = $this->getIndexField( $fulltext );
+		return "$field, '$searchon'";
+	}
+
+	/**
+	 * Create or update the search index record for the given page.
+	 * Title and text should be pre-processed.
+	 *
+	 * @param $id Integer
+	 * @param $title String
+	 * @param $text String
+	 */
+	function update( $id, $title, $text ) {
+		// We store the column data as UTF-8 byte order marked binary stream
+		// because we are invoking the plain text IFilter on it so that, and we want it 
+		// to properly decode the stream as UTF-8.  SQL doesn't support UTF8 as a data type
+		// but the indexer will correctly handle it by this method.  Since all we are doing
+		// is passing this data to the indexer and never retrieving it via PHP, this will save space
+		$table = $this->db->tableName( 'searchindex' );
+		$utf8bom = '0xEFBBBF';
+		$si_title = $utf8bom . bin2hex( $title );
+		$si_text = $utf8bom . bin2hex( $text );
+		$sql = "DELETE FROM $table WHERE si_page = $id;";
+		$sql .= "INSERT INTO $table (si_page, si_title, si_text) VALUES ($id, $si_title, $si_text)";
+		return $this->db->query( $sql, 'SearchMssql::update' );
+	}
+
+	/**
+	 * Update a search index record's title only.
+	 * Title should be pre-processed.
+	 *
+	 * @param $id Integer
+	 * @param $title String
+	 */
+	function updateTitle( $id, $title ) {
+		$table = $this->db->tableName( 'searchindex' );
+
+		// see update for why we are using the utf8bom
+		$utf8bom = '0xEFBBBF';
+		$si_title = $utf8bom . bin2hex( $title );
+		$sql = "DELETE FROM $table WHERE si_page = $id;";
+		$sql .= "INSERT INTO $table (si_page, si_title, si_text) VALUES ($id, $si_title, 0x00)";
+		return $this->db->query( $sql, 'SearchMssql::updateTitle' );
+	}
+}
+
+/**
+ * @ingroup Search
+ */
+class MssqlSearchResultSet extends SearchResultSet {
+	function __construct( $resultSet, $terms ) {
+		$this->mResultSet = $resultSet;
+		$this->mTerms = $terms;
+	}
+
+	function termMatches() {
+		return $this->mTerms;
+	}
+
+	function numRows() {
+		return $this->mResultSet->numRows();
+	}
+
+	function next() {
+		$row = $this->mResultSet->fetchObject();
+		if ( $row === false )
+			return false;
+		return new SearchResult( $row );
+	}
+}
+
+