rawText = trim( $text );
# We display the query, so let's strip it for safety
#
global $wgDBmysql4;
$lc = SearchEngine::legalSearchChars() . '()';
if( $wgDBmysql4 ) {
$lc .= "\"~<>*+-";
}
$this->filteredText = trim( preg_replace( "/[^{$lc}]/", " ", $text ) );
$this->searchTerms = array();
$this->strictMatching = true; # Google-style, add '+' on all terms
$this->db =& wfGetDB( DB_SLAVE );
}
/**
* Return a partial WHERE clause to limit the search to the given namespaces
*/
function queryNamespaces() {
$namespaces = implode( ',', $this->namespacesToSearch );
if ($namespaces == '') {
$namespaces = '0';
}
return "AND cur_namespace IN (" . $namespaces . ')';
}
/**
* Return a partial WHERE clause to include or exclude redirects from results
*/
function searchRedirects() {
if ( $this->doSearchRedirects ) {
return '';
} else {
return 'AND cur_is_redirect=0 ';
}
}
/**
* @access private
*/ function initNamespaceCheckbox( $i ) {
global $wgUser, $wgNamespacesToBeSearchedDefault;
if ($wgUser->getID()) {
// User is logged in so we retrieve his default namespaces
return $wgUser->getOption( 'searchNs'.$i );
} else {
// User is not logged in so we give him the global default namespaces
return !empty($wgNamespacesToBeSearchedDefault[ $i ]);
}
}
/**
* Display the "power search" footer. Does not actually perform the search,
* that is done by showResults()
*/
function powersearch() {
global $wgUser, $wgOut, $wgLang, $wgTitle, $wgRequest;
$sk =& $wgUser->getSkin();
$search = $this->rawText;
$searchx = $wgRequest->getVal( 'searchx' );
$listredirs = $wgRequest->getVal( 'redirs' );
$ret = wfMsg('powersearchtext'); # Text to be returned
$tempText = ''; # Temporary text, for substitution into $ret
if( isset( $_REQUEST['searchx'] ) ) {
$this->addToQuery['searchx'] = '1';
}
# Do namespace checkboxes
$namespaces = $wgLang->getNamespaces();
foreach ( $namespaces as $i => $namespace ) {
# Skip virtual namespaces
if ( $i < 0 ) {
continue;
}
$formVar = 'ns'.$i;
# Initialise checkboxValues, either from defaults or from
# a previous invocation
if ( !isset( $searchx ) ) {
$checkboxValue = $this->initNamespaceCheckbox( $i );
} else {
$checkboxValue = $wgRequest->getVal( $formVar );
}
$checked = '';
if ( $checkboxValue == 1 ) {
$checked = ' checked="checked"';
$this->addToQuery['ns'.$i] = 1;
array_push( $this->namespacesToSearch, $i );
}
$name = str_replace( '_', ' ', $namespaces[$i] );
if ( '' == $name ) {
$name = wfMsg( 'blanknamespace' );
}
if ( $tempText !== '' ) {
$tempText .= ' ';
}
$tempText .= "{$name}\n";
}
$ret = str_replace ( '$1', $tempText, $ret );
# List redirects checkbox
$checked = '';
if ( $listredirs == 1 ) {
$this->addToQuery['redirs'] = 1;
$checked = ' checked="checked"';
}
$tempText = "\n";
$ret = str_replace( '$2', $tempText, $ret );
# Search field
$tempText = "\n";
$ret = str_replace( "$3", $tempText, $ret );
# Searchx button
$tempText = '\n";
$ret = str_replace( '$9', $tempText, $ret );
$action = $sk->escapeSearchLink();
$ret = "
\n
{$top}
\n" ); # For powersearch $a2l = ''; $akk = array_keys( $this->addToQuery ); foreach ( $akk AS $ak ) { $a2l .= "&{$ak}={$this->addToQuery[$ak]}" ; } $prevnext = wfViewPrevNext( $offset, $limit, '', 'search=' . wfUrlencode( $this->filteredText ) . $a2l ); $wgOut->addHTML( "{$prevnext}
\n" ); $wgOut->addHTML( $powersearch ); } function legalSearchChars() { $lc = "A-Za-z_'0-9\\x80-\\xFF\\-"; return $lc; } function parseQuery() { global $wgDBmysql4; if( $wgDBmysql4 ) { # Use cleaner boolean search if available return $this->parseQuery4(); } else { # Fall back to ugly hack with multiple search clauses return $this->parseQuery3(); } } function parseQuery3() { global $wgDBminWordLen, $wgLang; # on non mysql4 database: get list of words we don't want to search for require_once( 'FulltextStoplist.php' ); $lc = SearchEngine::legalSearchChars() . '()'; $q = preg_replace( "/([()])/", " \\1 ", $this->filteredText ); $q = preg_replace( "/\\s+/", " ", $q ); $w = explode( ' ', trim( $q ) ); $last = $cond = ''; foreach ( $w as $word ) { $word = $wgLang->stripForSearch( $word ); if ( 'and' == $word || 'or' == $word || 'not' == $word || '(' == $word || ')' == $word ) { $cond .= ' ' . strtoupper( $word ); $last = ''; } else if ( strlen( $word ) < $wgDBminWordLen ) { continue; } else if ( FulltextStoplist::inList( $word ) ) { continue; } else { if ( '' != $last ) { $cond .= ' AND'; } $cond .= " (MATCH (##field##) AGAINST ('" . $this->db->strencode( $word ). "'))"; $last = $word; array_push( $this->searchTerms, "\\b" . $word . "\\b" ); } } if ( 0 == count( $this->searchTerms ) ) { return MW_SEARCH_BAD_QUERY; } $this->titleCond = '(' . str_replace( '##field##', 'si_title', $cond ) . ' )'; $this->textCond = '(' . str_replace( '##field##', 'si_text', $cond ) . ' AND (cur_is_redirect=0) )'; return MW_SEARCH_OK; } function parseQuery4() { global $wgLang; $lc = SearchEngine::legalSearchChars(); $searchon = ''; $this->searchTerms = array(); # FIXME: This doesn't handle parenthetical expressions. if( preg_match_all( '/([-+<>~]?)(([' . $lc . ']+)(\*?)|"[^"]*")/', $this->filteredText, $m, PREG_SET_ORDER ) ) { foreach( $m as $terms ) { if( $searchon !== '' ) $searchon .= ' '; if( $this->strictMatching && ($terms[1] == '') ) { $terms[1] = '+'; } $searchon .= $terms[1] . $wgLang->stripForSearch( $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[] = $regexp; } wfDebug( "Would search with '$searchon'\n" ); wfDebug( "Match with /\b" . implode( '\b|\b', $this->searchTerms ) . "\b/\n" ); } else { wfDebug( "Can't understand search query '{$this->filteredText}'\n" ); } $searchon = $this->db->strencode( $searchon ); $this->titleCond = " MATCH(si_title) AGAINST('$searchon' IN BOOLEAN MODE)"; $this->textCond = " (MATCH(si_text) AGAINST('$searchon' IN BOOLEAN MODE) AND cur_is_redirect=0)"; return MW_SEARCH_OK; } function &getMatches( $cond, $limit, $offset = 0 ) { $searchindex = $this->db->tableName( 'searchindex' ); $cur = $this->db->tableName( 'cur' ); $searchnamespaces = $this->queryNamespaces(); $redircond = $this->searchRedirects(); $sql = "SELECT cur_id,cur_namespace,cur_title," . "cur_text FROM $cur,$searchindex " . "WHERE cur_id=si_page AND {$cond} " . "{$searchnamespaces} {$redircond} " . $this->db->limitResult( $limit, $offset ); $res = $this->db->query( $sql, 'SearchEngine::getMatches' ); $matches = array(); while ( $row = $this->db->fetchObject( $res ) ) { $matches[] = $row; } $this->db->freeResult( $res ); return $matches; } function showMatches( &$matches, $offset, $msgEmpty, $msgFound ) { global $wgOut; if ( 0 == count( $matches ) ) { $wgOut->addHTML( "' . wfMsg('nogomatch', $editurl ) . "
\n" ); # Try a fuzzy title search $anyhit = false; global $wgDisableFuzzySearch; if(! $wgDisableFuzzySearch ){ foreach( array(NS_MAIN, NS_PROJECT, NS_USER, NS_IMAGE, NS_MEDIAWIKI) as $namespace){ $anyhit |= SearchEngine::doFuzzyTitleSearch( $this->rawText, $namespace ); } } if( ! $anyhit ){ return $this->showResults(); } } /** * @static */ function doFuzzyTitleSearch( $search, $namespace ){ global $wgLang, $wgOut; $this->setupPage(); $sstr = ucfirst($search); $sstr = str_replace(' ', '_', $sstr); $fuzzymatches = SearchEngine::fuzzyTitles( $sstr, $namespace ); $fuzzymatches = array_slice($fuzzymatches, 0, 10); $slen = strlen( $search ); $wikitext = ''; foreach($fuzzymatches as $res){ $t = str_replace('_', ' ', $res[1]); $tfull = $wgLang->getNsText( $namespace ) . ":$t|$t"; if( $namespace == NS_MAIN ) $tfull = "$t"; $distance = $res[0]; $closeness = (strlen( $search ) - $distance) / strlen( $search ); $percent = intval( $closeness * 100 ) . '%'; $stars = str_repeat('*', ceil(5 * $closeness) ); $wikitext .= "* [[$tfull]] $percent ($stars)\n"; } if( $wikitext ){ if( $namespace != NS_MAIN ) $wikitext = '=== ' . $wgLang->getNsText( $namespace ) . " ===\n" . $wikitext; $wgOut->addWikiText( $wikitext ); return true; } return false; } /** * @static */ function fuzzyTitles( $sstr, $namespace = NS_MAIN ){ $span = 0.10; // weed on title length before doing levenshtein. $tolerance = 0.35; // allowed percentage of erronous characters $slen = strlen($sstr); $tolerance_count = ceil($tolerance * $slen); $spanabs = ceil($slen * (1 + $span)) - $slen; # print "Word: $sstr, len = $slen, range = [$min, $max], tolerance_count = $tolerance_count