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 string
  81          */
  82         protected $sort;
  83
  84         /**
  85          * @var bool
  86          */
  87         protected $runSuggestion = true;
  88
  89         /**
  90          * Search engine configurations.
  91          * @var SearchEngineConfig
  92          */
  93         protected $searchConfig;
  94
  95         const NAMESPACES_CURRENT = 'sense';
  96
  97         public function __construct() {
  98                 parent::__construct( 'Search' );
  99                 $this->searchConfig = MediaWikiServices::getInstance()->getSearchEngineConfig();
 100         }
 101
 102         /**
 103          * Entry point
 104          *
 105          * @param string|null $par
 106          */
 107         public function execute( $par ) {
 108                 $request = $this->getRequest();
 109                 $out = $this->getOutput();
 110
 111                 // Fetch the search term
 112                 $term = str_replace( "\n", " ", $request->getText( 'search' ) );
 113
 114                 // Historically search terms have been accepted not only in the search query
 115                 // parameter, but also as part of the primary url. This can have PII implications
 116                 // in releasing page view data. As such issue a 301 redirect to the correct
 117                 // URL.
 118                 if ( $par !== null && $par !== '' && $term === '' ) {
 119                         $query = $request->getValues();
 120                         unset( $query['title'] );
 121                         // Strip underscores from title parameter; most of the time we'll want
 122                         // text form here. But don't strip underscores from actual text params!
 123                         $query['search'] = str_replace( '_', ' ', $par );
 124                         $out->redirect( $this->getPageTitle()->getFullURL( $query ), 301 );
 125                         return;
 126                 }
 127
 128                 // Need to load selected namespaces before handling nsRemember
 129                 $this->load();
 130                 // TODO: This performs database actions on GET request, which is going to
 131                 // be a problem for our multi-datacenter work.
 132                 if ( $request->getCheck( 'nsRemember' ) ) {
 133                         $this->saveNamespaces();
 134                         // Remove the token from the URL to prevent the user from inadvertently
 135                         // exposing it (e.g. by pasting it into a public wiki page) or undoing
 136                         // later settings changes (e.g. by reloading the page).
 137                         $query = $request->getValues();
 138                         unset( $query['title'], $query['nsRemember'] );
 139                         $out->redirect( $this->getPageTitle()->getFullURL( $query ) );
 140                         return;
 141                 }
 142
 143                 $this->searchEngineType = $request->getVal( 'srbackend' );
 144                 if ( !$request->getVal( 'fulltext' ) && !$request->getCheck( 'offset' ) ) {
 145                         $url = $this->goResult( $term );
 146                         if ( $url !== null ) {
 147                                 // successful 'go'
 148                                 $out->redirect( $url );
 149                                 return;
 150                         }
 151                         // No match. If it could plausibly be a title
 152                         // run the No go match hook.
 153                         $title = Title::newFromText( $term );
 154                         if ( !is_null( $title ) ) {
 155                                 Hooks::run( 'SpecialSearchNogomatch', [ &$title ] );
 156                         }
 157                 }
 158
 159                 $this->setupPage( $term );
 160
 161                 if ( $this->getConfig()->get( 'DisableTextSearch' ) ) {
 162                         $searchForwardUrl = $this->getConfig()->get( 'SearchForwardUrl' );
 163                         if ( $searchForwardUrl ) {
 164                                 $url = str_replace( '$1', urlencode( $term ), $searchForwardUrl );
 165                                 $out->redirect( $url );
 166                         } else {
 167                                 $this->showGoogleSearch( $term );
 168                         }
 169
 170                         return;
 171                 }
 172
 173                 $this->showResults( $term );
 174         }
 175
 176         /**
 177          * Output a google search form if search is disabled
 178          *
 179          * @param string $term Search term
 180          * @todo FIXME Maybe we should get rid of this raw html message at some future time
 181          * @suppress SecurityCheck-XSS
 182          */
 183         private function showGoogleSearch( $term ) {
 184                 $this->getOutput()->addHTML(
 185                         "<fieldset>" .
 186                                 "<legend>" .
 187                                         $this->msg( 'search-external' )->escaped() .
 188                                 "</legend>" .
 189                                 "<p class='mw-searchdisabled'>" .
 190                                         $this->msg( 'searchdisabled' )->escaped() .
 191                                 "</p>" .
 192                                 $this->msg( 'googlesearch' )->rawParams(
 193                                         htmlspecialchars( $term ),
 194                                         'UTF-8',
 195                                         $this->msg( 'searchbutton' )->escaped()
 196                                 )->text() .
 197                         "</fieldset>"
 198                 );
 199         }
 200
 201         /**
 202          * Set up basic search parameters from the request and user settings.
 203          *
 204          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 205          */
 206         public function load() {
 207                 $request = $this->getRequest();
 208                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '' );
 209                 $this->mPrefix = $request->getVal( 'prefix', '' );
 210                 if ( $this->mPrefix !== '' ) {
 211                         $this->setExtraParam( 'prefix', $this->mPrefix );
 212                 }
 213
 214                 $this->sort = $request->getVal( 'sort', SearchEngine::DEFAULT_SORT );
 215                 if ( $this->sort !== SearchEngine::DEFAULT_SORT ) {
 216                         $this->setExtraParam( 'sort', $this->sort );
 217                 }
 218
 219                 $user = $this->getUser();
 220
 221                 # Extract manually requested namespaces
 222                 $nslist = $this->powerSearch( $request );
 223                 if ( $nslist === [] ) {
 224                         # Fallback to user preference
 225                         $nslist = $this->searchConfig->userNamespaces( $user );
 226                 }
 227
 228                 $profile = null;
 229                 if ( $nslist === [] ) {
 230                         $profile = 'default';
 231                 }
 232
 233                 $profile = $request->getVal( 'profile', $profile );
 234                 $profiles = $this->getSearchProfiles();
 235                 if ( $profile === null ) {
 236                         // BC with old request format
 237                         $profile = 'advanced';
 238                         foreach ( $profiles as $key => $data ) {
 239                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 240                                         $profile = $key;
 241                                 }
 242                         }
 243                         $this->namespaces = $nslist;
 244                 } elseif ( $profile === 'advanced' ) {
 245                         $this->namespaces = $nslist;
 246                 } elseif ( isset( $profiles[$profile]['namespaces'] ) ) {
 247                         $this->namespaces = $profiles[$profile]['namespaces'];
 248                 } else {
 249                         // Unknown profile requested
 250                         $profile = 'default';
 251                         $this->namespaces = $profiles['default']['namespaces'];
 252                 }
 253
 254                 $this->fulltext = $request->getVal( 'fulltext' );
 255                 $this->runSuggestion = (bool)$request->getVal( 'runsuggestion', true );
 256                 $this->profile = $profile;
 257         }
 258
 259         /**
 260          * If an exact title match can be found, jump straight ahead to it.
 261          *
 262          * @param string $term
 263          * @return string|null The url to redirect to, or null if no redirect.
 264          */
 265         public function goResult( $term ) {
 266                 # If the string cannot be used to create a title
 267                 if ( is_null( Title::newFromText( $term ) ) ) {
 268                         return null;
 269                 }
 270                 # If there's an exact or very near match, jump right there.
 271                 $title = $this->getSearchEngine()
 272                         ->getNearMatcher( $this->getConfig() )->getNearMatch( $term );
 273                 if ( is_null( $title ) ) {
 274                         return null;
 275                 }
 276                 $url = null;
 277                 if ( !Hooks::run( 'SpecialSearchGoResult', [ $term, $title, &$url ] ) ) {
 278                         return null;
 279                 }
 280
 281                 return $url ?? $title->getFullUrlForRedirect();
 282         }
 283
 284         /**
 285          * @param string $term
 286          */
 287         public function showResults( $term ) {
 288                 if ( $this->searchEngineType !== null ) {
 289                         $this->setExtraParam( 'srbackend', $this->searchEngineType );
 290                 }
 291
 292                 $out = $this->getOutput();
 293                 $formWidget = new MediaWiki\Widget\Search\SearchFormWidget(
 294                         $this,
 295                         $this->searchConfig,
 296                         $this->getSearchProfiles()
 297                 );
 298                 $filePrefix = MediaWikiServices::getInstance()->getContentLanguage()->
 299                         getFormattedNsText( NS_FILE ) . ':';
 300                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 301                         // Empty query -- straight view of search form
 302                         if ( !Hooks::run( 'SpecialSearchResultsPrepend', [ $this, $out, $term ] ) ) {
 303                                 # Hook requested termination
 304                                 return;
 305                         }
 306                         $out->enableOOUI();
 307                         // The form also contains the 'Showing results 0 - 20 of 1234' so we can
 308                         // only do the form render here for the empty $term case. Rendering
 309                         // the form when a search is provided is repeated below.
 310                         $out->addHTML( $formWidget->render(
 311                                 $this->profile, $term, 0, 0, $this->offset, $this->isPowerSearch()
 312                         ) );
 313                         return;
 314                 }
 315
 316                 $search = $this->getSearchEngine();
 317                 $search->setFeatureData( 'rewrite', $this->runSuggestion );
 318                 $search->setLimitOffset( $this->limit, $this->offset );
 319                 $search->setNamespaces( $this->namespaces );
 320                 $search->setSort( $this->sort );
 321                 $search->prefix = $this->mPrefix;
 322
 323                 Hooks::run( 'SpecialSearchSetupEngine', [ $this, $this->profile, $search ] );
 324                 if ( !Hooks::run( 'SpecialSearchResultsPrepend', [ $this, $out, $term ] ) ) {
 325                         # Hook requested termination
 326                         return;
 327                 }
 328
 329                 $title = Title::newFromText( $term );
 330                 $showSuggestion = $title === null || !$title->isKnown();
 331                 $search->setShowSuggestion( $showSuggestion );
 332
 333                 $rewritten = $search->transformSearchTerm( $term );
 334                 if ( $rewritten !== $term ) {
 335                         $term = $rewritten;
 336                         wfDeprecated( 'SearchEngine::transformSearchTerm() (overridden by ' .
 337                                 get_class( $search ) . ')', '1.32' );
 338                 }
 339
 340                 $rewritten = $search->replacePrefixes( $term );
 341                 if ( $rewritten !== $term ) {
 342                         wfDeprecated( 'SearchEngine::replacePrefixes() (overridden by ' .
 343                                                   get_class( $search ) . ')', '1.32' );
 344                 }
 345
 346                 // fetch search results
 347                 $titleMatches = $search->searchTitle( $rewritten );
 348                 $textMatches = $search->searchText( $rewritten );
 349
 350                 $textStatus = null;
 351                 if ( $textMatches instanceof Status ) {
 352                         $textStatus = $textMatches;
 353                         $textMatches = $textStatus->getValue();
 354                 }
 355
 356                 // Get number of results
 357                 $titleMatchesNum = $textMatchesNum = $numTitleMatches = $numTextMatches = 0;
 358                 if ( $titleMatches ) {
 359                         $titleMatchesNum = $titleMatches->numRows();
 360                         $numTitleMatches = $titleMatches->getTotalHits();
 361                 }
 362                 if ( $textMatches ) {
 363                         $textMatchesNum = $textMatches->numRows();
 364                         $numTextMatches = $textMatches->getTotalHits();
 365                         if ( $textMatchesNum > 0 ) {
 366                                 $search->augmentSearchResults( $textMatches );
 367                         }
 368                 }
 369                 $num = $titleMatchesNum + $textMatchesNum;
 370                 $totalRes = $numTitleMatches + $numTextMatches;
 371
 372                 // start rendering the page
 373                 $out->enableOOUI();
 374                 $out->addHTML( $formWidget->render(
 375                         $this->profile, $term, $num, $totalRes, $this->offset, $this->isPowerSearch()
 376                 ) );
 377
 378                 // did you mean... suggestions
 379                 if ( $textMatches ) {
 380                         $dymWidget = new MediaWiki\Widget\Search\DidYouMeanWidget( $this );
 381                         $out->addHTML( $dymWidget->render( $term, $textMatches ) );
 382                 }
 383
 384                 $hasErrors = $textStatus && $textStatus->getErrors() !== [];
 385                 $hasOtherResults = $textMatches &&
 386                         $textMatches->hasInterwikiResults( SearchResultSet::INLINE_RESULTS );
 387
 388                 if ( $textMatches && $textMatches->hasInterwikiResults( SearchResultSet::SECONDARY_RESULTS ) ) {
 389                         $out->addHTML( '<div class="searchresults mw-searchresults-has-iw">' );
 390                 } else {
 391                         $out->addHTML( '<div class="searchresults">' );
 392                 }
 393
 394                 if ( $hasErrors ) {
 395                         list( $error, $warning ) = $textStatus->splitByErrorType();
 396                         if ( $error->getErrors() ) {
 397                                 $out->addHTML( Html::errorBox(
 398                                         $error->getHTML( 'search-error' )
 399                                 ) );
 400                         }
 401                         if ( $warning->getErrors() ) {
 402                                 $out->addHTML( Html::warningBox(
 403                                         $warning->getHTML( 'search-warning' )
 404                                 ) );
 405                         }
 406                 }
 407
 408                 // Show the create link ahead
 409                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 410
 411                 Hooks::run( 'SpecialSearchResults', [ $term, &$titleMatches, &$textMatches ] );
 412
 413                 // If we have no results and have not already displayed an error message
 414                 if ( $num === 0 && !$hasErrors ) {
 415                         $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>", [
 416                                 $hasOtherResults ? 'search-nonefound-thiswiki' : 'search-nonefound',
 417                                 wfEscapeWikiText( $term )
 418                         ] );
 419                 }
 420
 421                 // Although $num might be 0 there can still be secondary or inline
 422                 // results to display.
 423                 $linkRenderer = $this->getLinkRenderer();
 424                 $mainResultWidget = new FullSearchResultWidget( $this, $linkRenderer );
 425
 426                 // Default (null) on. Can be explicitly disabled.
 427                 if ( $search->getFeatureData( 'enable-new-crossproject-page' ) !== false ) {
 428                         $sidebarResultWidget = new InterwikiSearchResultWidget( $this, $linkRenderer );
 429                         $sidebarResultsWidget = new InterwikiSearchResultSetWidget(
 430                                 $this,
 431                                 $sidebarResultWidget,
 432                                 $linkRenderer,
 433                                 MediaWikiServices::getInstance()->getInterwikiLookup(),
 434                                 $search->getFeatureData( 'show-multimedia-search-results' )
 435                         );
 436                 } else {
 437                         $sidebarResultWidget = new SimpleSearchResultWidget( $this, $linkRenderer );
 438                         $sidebarResultsWidget = new SimpleSearchResultSetWidget(
 439                                 $this,
 440                                 $sidebarResultWidget,
 441                                 $linkRenderer,
 442                                 MediaWikiServices::getInstance()->getInterwikiLookup()
 443                         );
 444                 }
 445
 446                 $widget = new BasicSearchResultSetWidget( $this, $mainResultWidget, $sidebarResultsWidget );
 447
 448                 $out->addHTML( $widget->render(
 449                         $term, $this->offset, $titleMatches, $textMatches
 450                 ) );
 451
 452                 if ( $titleMatches ) {
 453                         $titleMatches->free();
 454                 }
 455
 456                 if ( $textMatches ) {
 457                         $textMatches->free();
 458                 }
 459
 460                 $out->addHTML( '<div class="mw-search-visualclear"></div>' );
 461
 462                 // prev/next links
 463                 if ( $totalRes > $this->limit || $this->offset ) {
 464                         // Allow matches to define the correct offset, as interleaved
 465                         // AB testing may require a different next page offset.
 466                         if ( $textMatches && $textMatches->getOffset() !== null ) {
 467                                 $offset = $textMatches->getOffset();
 468                         } else {
 469                                 $offset = $this->offset;
 470                         }
 471
 472                         $prevnext = $this->buildPrevNextNavigation(
 473                                 $offset,
 474                                 $this->limit,
 475                                 $this->powerSearchOptions() + [ 'search' => $term ],
 476                                 $this->limit + $this->offset >= $totalRes
 477                         );
 478                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 479                 }
 480
 481                 // Close <div class='searchresults'>
 482                 $out->addHTML( "</div>" );
 483
 484                 Hooks::run( 'SpecialSearchResultsAppend', [ $this, $out, $term ] );
 485         }
 486
 487         /**
 488          * @param Title $title
 489          * @param int $num The number of search results found
 490          * @param null|SearchResultSet $titleMatches Results from title search
 491          * @param null|SearchResultSet $textMatches Results from text search
 492          */
 493         protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
 494                 // show direct page/create link if applicable
 495
 496                 // Check DBkey !== '' in case of fragment link only.
 497                 if ( is_null( $title ) || $title->getDBkey() === ''
 498                         || ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
 499                         || ( $textMatches !== null && $textMatches->searchContainedSyntax() )
 500                 ) {
 501                         // invalid title
 502                         // preserve the paragraph for margins etc...
 503                         $this->getOutput()->addHTML( '<p></p>' );
 504
 505                         return;
 506                 }
 507
 508                 $messageName = 'searchmenu-new-nocreate';
 509                 $linkClass = 'mw-search-createlink';
 510
 511                 if ( !$title->isExternal() ) {
 512                         if ( $title->isKnown() ) {
 513                                 $messageName = 'searchmenu-exists';
 514                                 $linkClass = 'mw-search-exists';
 515                         } elseif ( ContentHandler::getForTitle( $title )->supportsDirectEditing()
 516                                 && $title->quickUserCan( 'create', $this->getUser() )
 517                         ) {
 518                                 $messageName = 'searchmenu-new';
 519                         }
 520                 }
 521
 522                 $params = [
 523                         $messageName,
 524                         wfEscapeWikiText( $title->getPrefixedText() ),
 525                         Message::numParam( $num )
 526                 ];
 527                 Hooks::run( 'SpecialSearchCreateLink', [ $title, &$params ] );
 528
 529                 // Extensions using the hook might still return an empty $messageName
 530                 if ( $messageName ) {
 531                         $this->getOutput()->wrapWikiMsg( "<p class=\"$linkClass\">\n$1</p>", $params );
 532                 } else {
 533                         // preserve the paragraph for margins etc...
 534                         $this->getOutput()->addHTML( '<p></p>' );
 535                 }
 536         }
 537
 538         /**
 539          * Sets up everything for the HTML output page including styles, javascript,
 540          * page title, etc.
 541          *
 542          * @param string $term
 543          */
 544         protected function setupPage( $term ) {
 545                 $out = $this->getOutput();
 546
 547                 $this->setHeaders();
 548                 $this->outputHeader();
 549                 // TODO: Is this true? The namespace remember uses a user token
 550                 // on save.
 551                 $out->allowClickjacking();
 552                 $this->addHelpLink( 'Help:Searching' );
 553
 554                 if ( strval( $term ) !== '' ) {
 555                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 556                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 557                                 ->plaintextParams( $this->msg( 'searchresults-title' )->plaintextParams( $term )->text() )
 558                                 ->inContentLanguage()->text()
 559                         );
 560                 }
 561
 562                 if ( $this->mPrefix !== '' ) {
 563                         $subtitle = $this->msg( 'search-filter-title-prefix' )->plaintextParams( $this->mPrefix );
 564                         $params = $this->powerSearchOptions();
 565                         unset( $params['prefix'] );
 566                         $params += [
 567                                 'search' => $term,
 568                                 'fulltext' => 1,
 569                         ];
 570
 571                         $subtitle .= ' (';
 572                         $subtitle .= Xml::element(
 573                                 'a',
 574                                 [
 575                                         'href' => $this->getPageTitle()->getLocalURL( $params ),
 576                                         'title' => $this->msg( 'search-filter-title-prefix-reset' )->text(),
 577                                 ],
 578                                 $this->msg( 'search-filter-title-prefix-reset' )->text()
 579                         );
 580                         $subtitle .= ')';
 581                         $out->setSubtitle( $subtitle );
 582                 }
 583
 584                 $out->addJsConfigVars( [ 'searchTerm' => $term ] );
 585                 $out->addModules( 'mediawiki.special.search' );
 586                 $out->addModuleStyles( [
 587                         'mediawiki.special', 'mediawiki.special.search.styles', 'mediawiki.ui', 'mediawiki.ui.button',
 588                         'mediawiki.ui.input', 'mediawiki.widgets.SearchInputWidget.styles',
 589                 ] );
 590         }
 591
 592         /**
 593          * Return true if current search is a power (advanced) search
 594          *
 595          * @return bool
 596          */
 597         protected function isPowerSearch() {
 598                 return $this->profile === 'advanced';
 599         }
 600
 601         /**
 602          * Extract "power search" namespace settings from the request object,
 603          * returning a list of index numbers to search.
 604          *
 605          * @param WebRequest &$request
 606          * @return array
 607          */
 608         protected function powerSearch( &$request ) {
 609                 $arr = [];
 610                 foreach ( $this->searchConfig->searchableNamespaces() as $ns => $name ) {
 611                         if ( $request->getCheck( 'ns' . $ns ) ) {
 612                                 $arr[] = $ns;
 613                         }
 614                 }
 615
 616                 return $arr;
 617         }
 618
 619         /**
 620          * Reconstruct the 'power search' options for links
 621          * TODO: Instead of exposing this publicly, could we instead expose
 622          *  a function for creating search links?
 623          *
 624          * @return array
 625          */
 626         public function powerSearchOptions() {
 627                 $opt = [];
 628                 if ( $this->isPowerSearch() ) {
 629                         foreach ( $this->namespaces as $n ) {
 630                                 $opt['ns' . $n] = 1;
 631                         }
 632                 } else {
 633                         $opt['profile'] = $this->profile;
 634                 }
 635
 636                 return $opt + $this->extraParams;
 637         }
 638
 639         /**
 640          * Save namespace preferences when we're supposed to
 641          *
 642          * @return bool Whether we wrote something
 643          */
 644         protected function saveNamespaces() {
 645                 $user = $this->getUser();
 646                 $request = $this->getRequest();
 647
 648                 if ( $user->isLoggedIn() &&
 649                         $user->matchEditToken(
 650                                 $request->getVal( 'nsRemember' ),
 651                                 'searchnamespace',
 652                                 $request
 653                         ) && !wfReadOnly()
 654                 ) {
 655                         // Reset namespace preferences: namespaces are not searched
 656                         // when they're not mentioned in the URL parameters.
 657                         foreach ( MWNamespace::getValidNamespaces() as $n ) {
 658                                 $user->setOption( 'searchNs' . $n, false );
 659                         }
 660                         // The request parameters include all the namespaces to be searched.
 661                         // Even if they're the same as an existing profile, they're not eaten.
 662                         foreach ( $this->namespaces as $n ) {
 663                                 $user->setOption( 'searchNs' . $n, true );
 664                         }
 665
 666                         DeferredUpdates::addCallableUpdate( function () use ( $user ) {
 667                                 $user->saveSettings();
 668                         } );
 669
 670                         return true;
 671                 }
 672
 673                 return false;
 674         }
 675
 676         /**
 677          * @return array
 678          */
 679         protected function getSearchProfiles() {
 680                 // Builds list of Search Types (profiles)
 681                 $nsAllSet = array_keys( $this->searchConfig->searchableNamespaces() );
 682                 $defaultNs = $this->searchConfig->defaultNamespaces();
 683                 $profiles = [
 684                         'default' => [
 685                                 'message' => 'searchprofile-articles',
 686                                 'tooltip' => 'searchprofile-articles-tooltip',
 687                                 'namespaces' => $defaultNs,
 688                                 'namespace-messages' => $this->searchConfig->namespacesAsText(
 689                                         $defaultNs
 690                                 ),
 691                         ],
 692                         'images' => [
 693                                 'message' => 'searchprofile-images',
 694                                 'tooltip' => 'searchprofile-images-tooltip',
 695                                 'namespaces' => [ NS_FILE ],
 696                         ],
 697                         'all' => [
 698                                 'message' => 'searchprofile-everything',
 699                                 'tooltip' => 'searchprofile-everything-tooltip',
 700                                 'namespaces' => $nsAllSet,
 701                         ],
 702                         'advanced' => [
 703                                 'message' => 'searchprofile-advanced',
 704                                 'tooltip' => 'searchprofile-advanced-tooltip',
 705                                 'namespaces' => self::NAMESPACES_CURRENT,
 706                         ]
 707                 ];
 708
 709                 Hooks::run( 'SpecialSearchProfiles', [ &$profiles ] );
 710
 711                 foreach ( $profiles as &$data ) {
 712                         if ( !is_array( $data['namespaces'] ) ) {
 713                                 continue;
 714                         }
 715                         sort( $data['namespaces'] );
 716                 }
 717
 718                 return $profiles;
 719         }
 720
 721         /**
 722          * @since 1.18
 723          *
 724          * @return SearchEngine
 725          */
 726         public function getSearchEngine() {
 727                 if ( $this->searchEngine === null ) {
 728                         $services = MediaWikiServices::getInstance();
 729                         $this->searchEngine = $this->searchEngineType ?
 730                                 $services->getSearchEngineFactory()->create( $this->searchEngineType ) :
 731                                 $services->newSearchEngine();
 732                 }
 733
 734                 return $this->searchEngine;
 735         }
 736
 737         /**
 738          * Current search profile.
 739          * @return null|string
 740          */
 741         function getProfile() {
 742                 return $this->profile;
 743         }
 744
 745         /**
 746          * Current namespaces.
 747          * @return array
 748          */
 749         function getNamespaces() {
 750                 return $this->namespaces;
 751         }
 752
 753         /**
 754          * Users of hook SpecialSearchSetupEngine can use this to
 755          * add more params to links to not lose selection when
 756          * user navigates search results.
 757          * @since 1.18
 758          *
 759          * @param string $key
 760          * @param mixed $value
 761          */
 762         public function setExtraParam( $key, $value ) {
 763                 $this->extraParams[$key] = $value;
 764         }
 765
 766         /**
 767          * The prefix value send to Special:Search using the 'prefix' URI param
 768          * It means that the user is willing to search for pages whose titles start with
 769          * this prefix value.
 770          * (Used by the InputBox extension)
 771          *
 772          * @return string
 773          */
 774         public function getPrefix() {
 775                 return $this->mPrefix;
 776         }
 777
 778         protected function getGroupName() {
 779                 return 'pages';
 780         }
 781 }