# See search.doc
class SearchEngine {
/* private */ var $mUsertext, $mSearchterms;
/* private */ var $mTitlecond, $mTextcond;
var $doSearchRedirects = true;
var $addtoquery = array();
var $namespacesToSearch = array();
var $alternateTitle;
function SearchEngine( $text )
{
# We display the query, so let's strip it for safety
#
global $wgDBmysql4;
$lc = SearchEngine::legalSearchChars() . "()";
if( $wgDBmysql4 ) $lc .= "\"~<>*+-";
$this->mUsertext = trim( preg_replace( "/[^{$lc}]/", " ", $text ) );
$this->mSearchterms = array();
}
function queryNamespaces()
{
$namespaces = implode( ",", $this->namespacesToSearch );
if ($namespaces == "") {
$namespaces = "0";
}
return "AND cur_namespace IN (" . $namespaces . ")";
#return "1";
}
function searchRedirects()
{
if ( $this->doSearchRedirects ) return "";
return "AND cur_is_redirect=0 ";
}
/* 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 $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;
$search = $_REQUEST['search'];
$searchx = $_REQUEST['searchx'];
$listredirs = $_REQUEST['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 = $_REQUEST[$formVar];
}
$checked = "";
if ( $checkboxValue == 1 ) {
$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";
}
$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 );
$ret = "
\n
" . wfMsg( "badquerytext" ) ); return; } list( $limit, $offset ) = wfCheckLimits( 20, "searchlimit" ); $searchnamespaces = $this->queryNamespaces(); $redircond = $this->searchRedirects(); $sql = "SELECT cur_id,cur_namespace,cur_title," . "cur_text FROM cur,searchindex " . "WHERE cur_id=si_page AND {$this->mTitlecond} " . "{$searchnamespaces} {$redircond}" . "LIMIT {$offset}, {$limit}"; $res1 = wfQuery( $sql, DB_READ, $fname ); $num = wfNumRows($res1); if ( $wgDisableTextSearch ) { $wgOut->addHTML( wfMsg( "searchdisabled", $search, $wgInputEncoding ) ); } else { $sk = $wgUser->getSkin(); $text = wfMsg( "searchresulttext", $sk->makeKnownLink( wfMsg( "searchhelppage" ), wfMsg( "searchingwikipedia" ) ) ); $wgOut->addHTML( $text ); $this->parseQuery(); if ( "" == $this->mTitlecond || "" == $this->mTextcond ) { $wgOut->addHTML( "
" . wfMsg( "badquerytext" ) ); return; } list( $limit, $offset ) = wfCheckLimits( 20, "searchlimit" ); $searchnamespaces = $this->queryNamespaces(); $redircond = $this->searchRedirects(); $sql = "SELECT cur_id,cur_namespace,cur_title," . "cur_text FROM cur,searchindex " . "WHERE cur_id=si_page AND {$this->mTitlecond} " . "{$searchnamespaces} {$redircond}" . "LIMIT {$offset}, {$limit}"; $res1 = wfQuery( $sql, DB_READ, $fname ); $num = wfNumRows($res1); $sql = "SELECT cur_id,cur_namespace,cur_title," . "cur_text FROM cur,searchindex " . "WHERE cur_id=si_page AND {$this->mTextcond} " . "{$searchnamespaces} {$redircond} " . "LIMIT {$offset}, {$limit}"; $res2 = wfQuery( $sql, DB_READ, $fname ); $num = $num + wfNumRows($res2); if ( $num == $limit ) { $top = wfShowingResults( $offset, $limit); } else { $top = wfShowingResultsNum( $offset, $limit, $num ); } $wgOut->addHTML( "
{$top}\n" );
# For powersearch
$a2l = "" ;
$akk = array_keys( $this->addtoquery ) ;
foreach ( $akk AS $ak ) {
$a2l .= "&{$ak}={$this->addtoquery[$ak]}" ;
}
$sl = wfViewPrevNext( $offset, $limit, "",
"search=" . wfUrlencode( $this->mUsertext ) . $a2l );
$wgOut->addHTML( "
{$sl}\n" );
$foundsome = false;
if ( 0 == wfNumRows( $res1 ) ) {
$wgOut->addHTML( "
" . wfMsg( "nonefound" ) . "\n" ); } $wgOut->addHTML( "
{$sl}\n" ); $wgOut->addHTML( $powersearch ); } } function legalSearchChars() { $lc = "A-Za-z_'0-9\\x80-\\xFF\\-"; return $lc; } function parseQuery() { global $wgDBminWordLen, $wgLang, $wgDBmysql4; if( $wgDBmysql4 ) { # Use cleaner boolean search if available return $this->parseQuery4(); } $lc = SearchEngine::legalSearchChars() . "()"; $q = preg_replace( "/([()])/", " \\1 ", $this->mUsertext ); $q = preg_replace( "/\\s+/", " ", $q ); $w = explode( " ", strtolower( 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 ('" . wfStrencode( $word ). "'))"; $last = $word; array_push( $this->mSearchterms, "\\b" . $word . "\\b" ); } } if ( 0 == count( $this->mSearchterms ) ) { return; } $this->mTitlecond = "(" . str_replace( "##field##", "si_title", $cond ) . " )"; $this->mTextcond = "(" . str_replace( "##field##", "si_text", $cond ) . " AND (cur_is_redirect=0) )"; } function parseQuery4() { # FIXME: not ready yet! Do not use. global $wgLang; $lc = SearchEngine::legalSearchChars(); #$q = preg_replace( "/([+-]?)([$lc]+)/e", # "\"$1\" . \$wgLang->stripForSearch(\"$2\")", # $this->mUsertext ); $q = $this->mUsertext; $qq = wfStrencode( $wgLang->stripForSearch( $q ) ); $this->mSearchterms = preg_split( '/\s+/', $q ); $this->mTitlecond = " MATCH(si_title) AGAINST('$qq' IN BOOLEAN MODE)"; $this->mTextcond = " (MATCH(si_text) AGAINST('$qq' IN BOOLEAN MODE) AND cur_is_redirect=0)"; } function showHit( $row ) { global $wgUser, $wgOut; $t = Title::makeName( $row->cur_namespace, $row->cur_title ); $sk = $wgUser->getSkin(); $contextlines = $wgUser->getOption( "contextlines" ); if ( "" == $contextlines ) { $contextlines = 5; } $contextchars = $wgUser->getOption( "contextchars" ); if ( "" == $contextchars ) { $contextchars = 50; } $link = $sk->makeKnownLink( $t, "" ); $size = wfMsg( "nbytes", strlen( $row->cur_text ) ); $wgOut->addHTML( "
" ); $this->showResults(); } } ?>