includes/specials/SpecialSearch.php

   1 <?php
   2 /**
   3  * Implements Special:Search
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  */
  25
  26 use MediaWiki\MediaWikiServices;
  27 use MediaWiki\Widget\Search\BasicSearchResultSetWidget;
  28 use MediaWiki\Widget\Search\FullSearchResultWidget;
  29 use MediaWiki\Widget\Search\InterwikiSearchResultWidget;
  30 use MediaWiki\Widget\Search\InterwikiSearchResultSetWidget;
  31 use MediaWiki\Widget\Search\SimpleSearchResultWidget;
  32 use MediaWiki\Widget\Search\SimpleSearchResultSetWidget;
  33
  34 /**
  35  * implements Special:Search - Run text & title search and display the output
  36  * @ingroup SpecialPage
  37  */
  38 class SpecialSearch extends SpecialPage {
  39         /**
  40          * Current search profile. Search profile is just a name that identifies
  41          * the active search tab on the search page (content, discussions...)
  42          * For users tt replaces the set of enabled namespaces from the query
  43          * string when applicable. Extensions can add new profiles with hooks
  44          * with custom search options just for that profile.
  45          * @var null|string
  46          */
  47         protected $profile;
  48
  49         /** @var SearchEngine Search engine */
  50         protected $searchEngine;
  51
  52         /** @var string Search engine type, if not default */
  53         protected $searchEngineType;
  54
  55         /** @var array For links */
  56         protected $extraParams = [];
  57
  58         /**
  59          * @var string The prefix url parameter. Set on the searcher and the
  60          * is expected to treat it as prefix filter on titles.
  61          */
  62         protected $mPrefix;
  63
  64         /**
  65          * @var int
  66          */
  67         protected $limit, $offset;
  68
  69         /**
  70          * @var array
  71          */
  72         protected $namespaces;
  73
  74         /**
  75          * @var string
  76          */
  77         protected $fulltext;
  78
  79         /**
  80          * @var bool
  81          */
  82         protected $runSuggestion = true;
  83
  84         /**
  85          * Search engine configurations.
  86          * @var SearchEngineConfig
  87          */
  88         protected $searchConfig;
  89
  90         const NAMESPACES_CURRENT = 'sense';
  91
  92         public function __construct() {
  93                 parent::__construct( 'Search' );
  94                 $this->searchConfig = MediaWikiServices::getInstance()->getSearchEngineConfig();
  95         }
  96
  97         /**
  98          * Entry point
  99          *
 100          * @param string $par
 101          */
 102         public function execute( $par ) {
 103                 $request = $this->getRequest();
 104                 $out = $this->getOutput();
 105
 106                 // Fetch the search term
 107                 $term = str_replace( "\n", " ", $request->getText( 'search' ) );
 108
 109                 // Historically search terms have been accepted not only in the search query
 110                 // parameter, but also as part of the primary url. This can have PII implications
 111                 // in releasing page view data. As such issue a 301 redirect to the correct
 112                 // URL.
 113                 if ( strlen( $par ) && !strlen( $term ) ) {
 114                         $query = $request->getValues();
 115                         unset( $query['title'] );
 116                         // Strip underscores from title parameter; most of the time we'll want
 117                         // text form here. But don't strip underscores from actual text params!
 118                         $query['search'] = str_replace( '_', ' ', $par );
 119                         $out->redirect( $this->getPageTitle()->getFullURL( $query ), 301 );
 120                         return;
 121                 }
 122
 123                 // Need to load selected namespaces before handling nsRemember
 124                 $this->load();
 125                 // TODO: This performs database actions on GET request, which is going to
 126                 // be a problem for our multi-datacenter work.
 127                 if ( !is_null( $request->getVal( 'nsRemember' ) ) ) {
 128                         $this->saveNamespaces();
 129                         // Remove the token from the URL to prevent the user from inadvertently
 130                         // exposing it (e.g. by pasting it into a public wiki page) or undoing
 131                         // later settings changes (e.g. by reloading the page).
 132                         $query = $request->getValues();
 133                         unset( $query['title'], $query['nsRemember'] );
 134                         $out->redirect( $this->getPageTitle()->getFullURL( $query ) );
 135                         return;
 136                 }
 137
 138                 $this->searchEngineType = $request->getVal( 'srbackend' );
 139                 if (
 140                         !$request->getVal( 'fulltext' ) &&
 141                         $request->getVal( 'offset' ) === null
 142                 ) {
 143                         $url = $this->goResult( $term );
 144                         if ( $url !== null ) {
 145                                 // successful 'go'
 146                                 $out->redirect( $url );
 147                                 return;
 148                         }
 149                         // No match. If it could plausibly be a title
 150                         // run the No go match hook.
 151                         $title = Title::newFromText( $term );
 152                         if ( !is_null( $title ) ) {
 153                                 Hooks::run( 'SpecialSearchNogomatch', [ &$title ] );
 154                         }
 155                 }
 156
 157                 $this->setupPage( $term );
 158
 159                 if ( $this->getConfig()->get( 'DisableTextSearch' ) ) {
 160                         $searchForwardUrl = $this->getConfig()->get( 'SearchForwardUrl' );
 161                         if ( $searchForwardUrl ) {
 162                                 $url = str_replace( '$1', urlencode( $term ), $searchForwardUrl );
 163                                 $out->redirect( $url );
 164                         } else {
 165                                 $out->addHTML(
 166                                         "<fieldset>" .
 167                                                 "<legend>" .
 168                                                         $this->msg( 'search-external' )->escaped() .
 169                                                 "</legend>" .
 170                                                 "<p class='mw-searchdisabled'>" .
 171                                                         $this->msg( 'searchdisabled' )->escaped() .
 172                                                 "</p>" .
 173                                                 $this->msg( 'googlesearch' )->rawParams(
 174                                                         htmlspecialchars( $term ),
 175                                                         'UTF-8',
 176                                                         $this->msg( 'searchbutton' )->escaped()
 177                                                 )->text() .
 178                                         "</fieldset>"
 179                                 );
 180                         }
 181
 182                         return;
 183                 }
 184
 185                 $this->showResults( $term );
 186         }
 187
 188         /**
 189          * Set up basic search parameters from the request and user settings.
 190          *
 191          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 192          */
 193         public function load() {
 194                 $request = $this->getRequest();
 195                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '' );
 196                 $this->mPrefix = $request->getVal( 'prefix', '' );
 197
 198                 $user = $this->getUser();
 199
 200                 # Extract manually requested namespaces
 201                 $nslist = $this->powerSearch( $request );
 202                 if ( !count( $nslist ) ) {
 203                         # Fallback to user preference
 204                         $nslist = $this->searchConfig->userNamespaces( $user );
 205                 }
 206
 207                 $profile = null;
 208                 if ( !count( $nslist ) ) {
 209                         $profile = 'default';
 210                 }
 211
 212                 $profile = $request->getVal( 'profile', $profile );
 213                 $profiles = $this->getSearchProfiles();
 214                 if ( $profile === null ) {
 215                         // BC with old request format
 216                         $profile = 'advanced';
 217                         foreach ( $profiles as $key => $data ) {
 218                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 219                                         $profile = $key;
 220                                 }
 221                         }
 222                         $this->namespaces = $nslist;
 223                 } elseif ( $profile === 'advanced' ) {
 224                         $this->namespaces = $nslist;
 225                 } else {
 226                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 227                                 $this->namespaces = $profiles[$profile]['namespaces'];
 228                         } else {
 229                                 // Unknown profile requested
 230                                 $profile = 'default';
 231                                 $this->namespaces = $profiles['default']['namespaces'];
 232                         }
 233                 }
 234
 235                 $this->fulltext = $request->getVal( 'fulltext' );
 236                 $this->runSuggestion = (bool)$request->getVal( 'runsuggestion', true );
 237                 $this->profile = $profile;
 238         }
 239
 240         /**
 241          * If an exact title match can be found, jump straight ahead to it.
 242          *
 243          * @param string $term
 244          * @return string|null The url to redirect to, or null if no redirect.
 245          */
 246         public function goResult( $term ) {
 247                 # If the string cannot be used to create a title
 248                 if ( is_null( Title::newFromText( $term ) ) ) {
 249                         return null;
 250                 }
 251                 # If there's an exact or very near match, jump right there.
 252                 $title = $this->getSearchEngine()
 253                         ->getNearMatcher( $this->getConfig() )->getNearMatch( $term );
 254                 if ( is_null( $title ) ) {
 255                         return null;
 256                 }
 257                 $url = null;
 258                 if ( !Hooks::run( 'SpecialSearchGoResult', [ $term, $title, &$url ] ) ) {
 259                         return null;
 260                 }
 261
 262                 return $url === null ? $title->getFullUrlForRedirect() : $url;
 263         }
 264
 265         /**
 266          * @param string $term
 267          */
 268         public function showResults( $term ) {
 269                 global $wgContLang;
 270
 271                 if ( $this->searchEngineType !== null ) {
 272                         $this->setExtraParam( 'srbackend', $this->searchEngineType );
 273                 }
 274
 275                 $out = $this->getOutput();
 276                 $formWidget = new MediaWiki\Widget\Search\SearchFormWidget(
 277                         $this,
 278                         $this->searchConfig,
 279                         $this->getSearchProfiles()
 280                 );
 281                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 282                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 283                         // Empty query -- straight view of search form
 284                         if ( !Hooks::run( 'SpecialSearchResultsPrepend', [ $this, $out, $term ] ) ) {
 285                                 # Hook requested termination
 286                                 return;
 287                         }
 288                         $out->enableOOUI();
 289                         // The form also contains the 'Showing results 0 - 20 of 1234' so we can
 290                         // only do the form render here for the empty $term case. Rendering
 291                         // the form when a search is provided is repeated below.
 292                         $out->addHTML( $formWidget->render(
 293                                 $this->profile, $term, 0, 0, $this->offset, $this->isPowerSearch()
 294                         ) );
 295                         return;
 296                 }
 297
 298                 $search = $this->getSearchEngine();
 299                 $search->setFeatureData( 'rewrite', $this->runSuggestion );
 300                 $search->setLimitOffset( $this->limit, $this->offset );
 301                 $search->setNamespaces( $this->namespaces );
 302                 $search->prefix = $this->mPrefix;
 303                 $term = $search->transformSearchTerm( $term );
 304
 305                 Hooks::run( 'SpecialSearchSetupEngine', [ $this, $this->profile, $search ] );
 306                 if ( !Hooks::run( 'SpecialSearchResultsPrepend', [ $this, $out, $term ] ) ) {
 307                         # Hook requested termination
 308                         return;
 309                 }
 310
 311                 $title = Title::newFromText( $term );
 312                 $showSuggestion = $title === null || !$title->isKnown();
 313                 $search->setShowSuggestion( $showSuggestion );
 314
 315                 // fetch search results
 316                 $rewritten = $search->replacePrefixes( $term );
 317
 318                 $titleMatches = $search->searchTitle( $rewritten );
 319                 $textMatches = $search->searchText( $rewritten );
 320
 321                 $textStatus = null;
 322                 if ( $textMatches instanceof Status ) {
 323                         $textStatus = $textMatches;
 324                         $textMatches = $textStatus->getValue();
 325                 }
 326
 327                 // Get number of results
 328                 $titleMatchesNum = $textMatchesNum = $numTitleMatches = $numTextMatches = 0;
 329                 if ( $titleMatches ) {
 330                         $titleMatchesNum = $titleMatches->numRows();
 331                         $numTitleMatches = $titleMatches->getTotalHits();
 332                 }
 333                 if ( $textMatches ) {
 334                         $textMatchesNum = $textMatches->numRows();
 335                         $numTextMatches = $textMatches->getTotalHits();
 336                         if ( $textMatchesNum > 0 ) {
 337                                 $search->augmentSearchResults( $textMatches );
 338                         }
 339                 }
 340                 $num = $titleMatchesNum + $textMatchesNum;
 341                 $totalRes = $numTitleMatches + $numTextMatches;
 342
 343                 // start rendering the page
 344                 $out->enableOOUI();
 345                 $out->addHTML( $formWidget->render(
 346                         $this->profile, $term, $num, $totalRes, $this->offset, $this->isPowerSearch()
 347                 ) );
 348
 349                 // did you mean... suggestions
 350                 if ( $textMatches ) {
 351                         $dymWidget = new MediaWiki\Widget\Search\DidYouMeanWidget( $this );
 352                         $out->addHTML( $dymWidget->render( $term, $textMatches ) );
 353                 }
 354
 355                 $out->addHTML( "<div class='searchresults'>" );
 356
 357                 $hasErrors = $textStatus && $textStatus->getErrors();
 358                 $hasOtherResults = $textMatches &&
 359                         $textMatches->hasInterwikiResults( SearchResultSet::INLINE_RESULTS );
 360
 361                 if ( $hasErrors ) {
 362                         list( $error, $warning ) = $textStatus->splitByErrorType();
 363                         if ( $error->getErrors() ) {
 364                                 $out->addHTML( Html::rawElement(
 365                                         'div',
 366                                         [ 'class' => 'errorbox' ],
 367                                         $error->getHTML( 'search-error' )
 368                                 ) );
 369                         }
 370                         if ( $warning->getErrors() ) {
 371                                 $out->addHTML( Html::rawElement(
 372                                         'div',
 373                                         [ 'class' => 'warningbox' ],
 374                                         $warning->getHTML( 'search-warning' )
 375                                 ) );
 376                         }
 377                 }
 378
 379                 // Show the create link ahead
 380                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 381
 382                 Hooks::run( 'SpecialSearchResults', [ $term, &$titleMatches, &$textMatches ] );
 383
 384                 // If we have no results and have not already displayed an error message
 385                 if ( $num === 0 && !$hasErrors ) {
 386                         $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>", [
 387                                 $hasOtherResults ? 'search-nonefound-thiswiki' : 'search-nonefound',
 388                                 wfEscapeWikiText( $term )
 389                         ] );
 390                 }
 391
 392                 // Although $num might be 0 there can still be secondary or inline
 393                 // results to display.
 394                 $linkRenderer = $this->getLinkRenderer();
 395                 $mainResultWidget = new FullSearchResultWidget( $this, $linkRenderer );
 396
 397                 if ( $search->getFeatureData( 'enable-new-crossproject-page' ) ) {
 398
 399                         $sidebarResultWidget = new InterwikiSearchResultWidget( $this, $linkRenderer );
 400                         $sidebarResultsWidget = new InterwikiSearchResultSetWidget(
 401                                 $this,
 402                                 $sidebarResultWidget,
 403                                 $linkRenderer,
 404                                 MediaWikiServices::getInstance()->getInterwikiLookup()
 405                         );
 406                 } else {
 407                         $sidebarResultWidget = new SimpleSearchResultWidget( $this, $linkRenderer );
 408                         $sidebarResultsWidget = new SimpleSearchResultSetWidget(
 409                                 $this,
 410                                 $sidebarResultWidget,
 411                                 $linkRenderer,
 412                                 MediaWikiServices::getInstance()->getInterwikiLookup()
 413                         );
 414                 }
 415
 416                 $widget = new BasicSearchResultSetWidget( $this, $mainResultWidget, $sidebarResultsWidget );
 417
 418                 $out->addHTML( $widget->render(
 419                         $term, $this->offset, $titleMatches, $textMatches
 420                 ) );
 421
 422                 if ( $titleMatches ) {
 423                         $titleMatches->free();
 424                 }
 425
 426                 if ( $textMatches ) {
 427                         $textMatches->free();
 428                 }
 429
 430                 $out->addHTML( '<div class="mw-search-visualclear"></div>' );
 431
 432                 // prev/next links
 433                 if ( $totalRes > $this->limit || $this->offset ) {
 434                         $prevnext = $this->getLanguage()->viewPrevNext(
 435                                 $this->getPageTitle(),
 436                                 $this->offset,
 437                                 $this->limit,
 438                                 $this->powerSearchOptions() + [ 'search' => $term ],
 439                                 $this->limit + $this->offset >= $totalRes
 440                         );
 441                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 442                 }
 443
 444                 // Close <div class='searchresults'>
 445                 $out->addHTML( "</div>" );
 446
 447                 Hooks::run( 'SpecialSearchResultsAppend', [ $this, $out, $term ] );
 448         }
 449
 450         /**
 451          * @param Title $title
 452          * @param int $num The number of search results found
 453          * @param null|SearchResultSet $titleMatches Results from title search
 454          * @param null|SearchResultSet $textMatches Results from text search
 455          */
 456         protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
 457                 // show direct page/create link if applicable
 458
 459                 // Check DBkey !== '' in case of fragment link only.
 460                 if ( is_null( $title ) || $title->getDBkey() === ''
 461                         || ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
 462                         || ( $textMatches !== null && $textMatches->searchContainedSyntax() )
 463                 ) {
 464                         // invalid title
 465                         // preserve the paragraph for margins etc...
 466                         $this->getOutput()->addHTML( '<p></p>' );
 467
 468                         return;
 469                 }
 470
 471                 $messageName = 'searchmenu-new-nocreate';
 472                 $linkClass = 'mw-search-createlink';
 473
 474                 if ( !$title->isExternal() ) {
 475                         if ( $title->isKnown() ) {
 476                                 $messageName = 'searchmenu-exists';
 477                                 $linkClass = 'mw-search-exists';
 478                         } elseif ( $title->quickUserCan( 'create', $this->getUser() ) ) {
 479                                 $messageName = 'searchmenu-new';
 480                         }
 481                 }
 482
 483                 $params = [
 484                         $messageName,
 485                         wfEscapeWikiText( $title->getPrefixedText() ),
 486                         Message::numParam( $num )
 487                 ];
 488                 Hooks::run( 'SpecialSearchCreateLink', [ $title, &$params ] );
 489
 490                 // Extensions using the hook might still return an empty $messageName
 491                 if ( $messageName ) {
 492                         $this->getOutput()->wrapWikiMsg( "<p class=\"$linkClass\">\n$1</p>", $params );
 493                 } else {
 494                         // preserve the paragraph for margins etc...
 495                         $this->getOutput()->addHTML( '<p></p>' );
 496                 }
 497         }
 498
 499         /**
 500          * Sets up everything for the HTML output page including styles, javascript,
 501          * page title, etc.
 502          *
 503          * @param string $term
 504          */
 505         protected function setupPage( $term ) {
 506                 $out = $this->getOutput();
 507
 508                 $this->setHeaders();
 509                 $this->outputHeader();
 510                 // TODO: Is this true? The namespace remember uses a user token
 511                 // on save.
 512                 $out->allowClickjacking();
 513                 $this->addHelpLink( 'Help:Searching' );
 514
 515                 if ( strval( $term ) !== '' ) {
 516                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 517                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 518                                 ->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
 519                                 ->inContentLanguage()->text()
 520                         );
 521                 }
 522
 523                 $out->addJsConfigVars( [ 'searchTerm' => $term ] );
 524                 $out->addModules( 'mediawiki.special.search' );
 525                 $out->addModuleStyles( [
 526                         'mediawiki.special', 'mediawiki.special.search.styles', 'mediawiki.ui', 'mediawiki.ui.button',
 527                         'mediawiki.ui.input', 'mediawiki.widgets.SearchInputWidget.styles',
 528                 ] );
 529         }
 530
 531         /**
 532          * Return true if current search is a power (advanced) search
 533          *
 534          * @return bool
 535          */
 536         protected function isPowerSearch() {
 537                 return $this->profile === 'advanced';
 538         }
 539
 540         /**
 541          * Extract "power search" namespace settings from the request object,
 542          * returning a list of index numbers to search.
 543          *
 544          * @param WebRequest $request
 545          * @return array
 546          */
 547         protected function powerSearch( &$request ) {
 548                 $arr = [];
 549                 foreach ( $this->searchConfig->searchableNamespaces() as $ns => $name ) {
 550                         if ( $request->getCheck( 'ns' . $ns ) ) {
 551                                 $arr[] = $ns;
 552                         }
 553                 }
 554
 555                 return $arr;
 556         }
 557
 558         /**
 559          * Reconstruct the 'power search' options for links
 560          * TODO: Instead of exposing this publicly, could we instead expose
 561          *  a function for creating search links?
 562          *
 563          * @return array
 564          */
 565         public function powerSearchOptions() {
 566                 $opt = [];
 567                 if ( $this->isPowerSearch() ) {
 568                         foreach ( $this->namespaces as $n ) {
 569                                 $opt['ns' . $n] = 1;
 570                         }
 571                 } else {
 572                         $opt['profile'] = $this->profile;
 573                 }
 574
 575                 return $opt + $this->extraParams;
 576         }
 577
 578         /**
 579          * Save namespace preferences when we're supposed to
 580          *
 581          * @return bool Whether we wrote something
 582          */
 583         protected function saveNamespaces() {
 584                 $user = $this->getUser();
 585                 $request = $this->getRequest();
 586
 587                 if ( $user->isLoggedIn() &&
 588                         $user->matchEditToken(
 589                                 $request->getVal( 'nsRemember' ),
 590                                 'searchnamespace',
 591                                 $request
 592                         ) && !wfReadOnly()
 593                 ) {
 594                         // Reset namespace preferences: namespaces are not searched
 595                         // when they're not mentioned in the URL parameters.
 596                         foreach ( MWNamespace::getValidNamespaces() as $n ) {
 597                                 $user->setOption( 'searchNs' . $n, false );
 598                         }
 599                         // The request parameters include all the namespaces to be searched.
 600                         // Even if they're the same as an existing profile, they're not eaten.
 601                         foreach ( $this->namespaces as $n ) {
 602                                 $user->setOption( 'searchNs' . $n, true );
 603                         }
 604
 605                         DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 606                                 $user->saveSettings();
 607                         } );
 608
 609                         return true;
 610                 }
 611
 612                 return false;
 613         }
 614
 615         /**
 616          * @return array
 617          */
 618         protected function getSearchProfiles() {
 619                 // Builds list of Search Types (profiles)
 620                 $nsAllSet = array_keys( $this->searchConfig->searchableNamespaces() );
 621                 $defaultNs = $this->searchConfig->defaultNamespaces();
 622                 $profiles = [
 623                         'default' => [
 624                                 'message' => 'searchprofile-articles',
 625                                 'tooltip' => 'searchprofile-articles-tooltip',
 626                                 'namespaces' => $defaultNs,
 627                                 'namespace-messages' => $this->searchConfig->namespacesAsText(
 628                                         $defaultNs
 629                                 ),
 630                         ],
 631                         'images' => [
 632                                 'message' => 'searchprofile-images',
 633                                 'tooltip' => 'searchprofile-images-tooltip',
 634                                 'namespaces' => [ NS_FILE ],
 635                         ],
 636                         'all' => [
 637                                 'message' => 'searchprofile-everything',
 638                                 'tooltip' => 'searchprofile-everything-tooltip',
 639                                 'namespaces' => $nsAllSet,
 640                         ],
 641                         'advanced' => [
 642                                 'message' => 'searchprofile-advanced',
 643                                 'tooltip' => 'searchprofile-advanced-tooltip',
 644                                 'namespaces' => self::NAMESPACES_CURRENT,
 645                         ]
 646                 ];
 647
 648                 Hooks::run( 'SpecialSearchProfiles', [ &$profiles ] );
 649
 650                 foreach ( $profiles as &$data ) {
 651                         if ( !is_array( $data['namespaces'] ) ) {
 652                                 continue;
 653                         }
 654                         sort( $data['namespaces'] );
 655                 }
 656
 657                 return $profiles;
 658         }
 659
 660         /**
 661          * @since 1.18
 662          *
 663          * @return SearchEngine
 664          */
 665         public function getSearchEngine() {
 666                 if ( $this->searchEngine === null ) {
 667                         $this->searchEngine = $this->searchEngineType ?
 668                                 MediaWikiServices::getInstance()->getSearchEngineFactory()->create( $this->searchEngineType ) :
 669                                 MediaWikiServices::getInstance()->newSearchEngine();
 670                 }
 671
 672                 return $this->searchEngine;
 673         }
 674
 675         /**
 676          * Current search profile.
 677          * @return null|string
 678          */
 679         function getProfile() {
 680                 return $this->profile;
 681         }
 682
 683         /**
 684          * Current namespaces.
 685          * @return array
 686          */
 687         function getNamespaces() {
 688                 return $this->namespaces;
 689         }
 690
 691         /**
 692          * Users of hook SpecialSearchSetupEngine can use this to
 693          * add more params to links to not lose selection when
 694          * user navigates search results.
 695          * @since 1.18
 696          *
 697          * @param string $key
 698          * @param mixed $value
 699          */
 700         public function setExtraParam( $key, $value ) {
 701                 $this->extraParams[$key] = $value;
 702         }
 703
 704         protected function getGroupName() {
 705                 return 'pages';
 706         }
 707 }