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<?php
class PrefixSearch {
/**
* Do a prefix search of titles and return a list of matching page names.
* @param string $search
* @param int $limit
* @return array of strings
*/
public static function titleSearch( $search, $limit ) {
$search = trim( $search );
if( $search == '' ) {
return array(); // Return empty result
}
$title = Title::newFromText( $search );
if( $title && $title->getInterwiki() == '' ) {
$ns = $title->getNamespace();
return self::searchBackend(
$title->getNamespace(), $title->getText(), $limit );
}
// Is this a namespace prefix?
$title = Title::newFromText( $search . 'Dummy' );
if( $title && $title->getText() == 'Dummy'
&& $title->getNamespace() != NS_MAIN
&& $title->getInterwiki() == '' ) {
return self::searchBackend(
$title->getNamespace(), '', $limit );
}
return self::searchBackend( 0, $search, $limit );
}
/**
* Do a prefix search of titles and return a list of matching page names.
* @param string $search
* @param int $limit
* @return array of strings
*/
protected static function searchBackend( $ns, $search, $limit ) {
if( $ns == NS_MEDIA ) {
$ns = NS_IMAGE;
} elseif( $ns == NS_SPECIAL ) {
return self::specialSearch( $search, $limit );
}
$srchres = array();
if( wfRunHooks( 'PrefixSearchBackend', array( $ns, $search, $limit, &$srchres ) ) ) {
return self::defaultSearchBackend( $ns, $search, $limit );
}
return $srchres;
}
/**
* Prefix search special-case for Special: namespace.
*/
protected static function specialSearch( $search, $limit ) {
global $wgContLang;
$searchKey = $wgContLang->caseFold( $search );
// Unlike SpecialPage itself, we want the canonical forms of both
// canonical and alias title forms...
SpecialPage::initList();
SpecialPage::initAliasList();
$keys = array();
foreach( array_keys( SpecialPage::$mList ) as $page ) {
$keys[$wgContLang->caseFold( $page )] = $page;
}
foreach( $wgContLang->getSpecialPageAliases() as $page => $aliases ) {
foreach( $aliases as $alias ) {
$keys[$wgContLang->caseFold( $alias )] = $alias;
}
}
ksort( $keys );
$srchres = array();
foreach( $keys as $pageKey => $page ) {
if( $searchKey === '' || strpos( $pageKey, $searchKey ) === 0 ) {
$srchres[] = Title::makeTitle( NS_SPECIAL, $page )->getPrefixedText();
}
if( count( $srchres ) >= $limit ) {
break;
}
}
return $srchres;
}
/**
* Unless overridden by PrefixSearchBackend hook...
* This is case-sensitive except the first letter (per $wgCapitalLinks)
*
* @param int $ns Namespace to search in
* @param string $search term
* @param int $limit max number of items to return
* @return array of title strings
*/
protected static function defaultSearchBackend( $ns, $search, $limit ) {
global $wgCapitalLinks, $wgContLang;
if( $wgCapitalLinks ) {
$search = $wgContLang->ucfirst( $search );
}
// Prepare nested request
$req = new FauxRequest(array (
'action' => 'query',
'list' => 'allpages',
'apnamespace' => $ns,
'aplimit' => $limit,
'apprefix' => $search
));
// Execute
$module = new ApiMain($req);
$module->execute();
// Get resulting data
$data = $module->getResultData();
// Reformat useful data for future printing by JSON engine
$srchres = array ();
foreach ($data['query']['allpages'] as & $pageinfo) {
// Note: this data will no be printable by the xml engine
// because it does not support lists of unnamed items
$srchres[] = $pageinfo['title'];
}
return $srchres;
}
}
?>
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