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 /**
  27  * implements Special:Search - Run text & title search and display the output
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialSearch extends SpecialPage {
  31         /**
  32          * Current search profile. Search profile is just a name that identifies
  33          * the active search tab on the search page (content, discussions...)
  34          * For users tt replaces the set of enabled namespaces from the query
  35          * string when applicable. Extensions can add new profiles with hooks
  36          * with custom search options just for that profile.
  37          * @var null|string
  38          */
  39         protected $profile;
  40
  41         /** @var SearchEngine Search engine */
  42         protected $searchEngine;
  43
  44         /** @var string Search engine type, if not default */
  45         protected $searchEngineType;
  46
  47         /** @var array For links */
  48         protected $extraParams = array();
  49
  50         /** @var string No idea, apparently used by some other classes */
  51         protected $mPrefix;
  52
  53         /**
  54          * @var int
  55          */
  56         protected $limit, $offset;
  57
  58         /**
  59          * @var array
  60          */
  61         protected $namespaces;
  62
  63         /**
  64          * @var string
  65          */
  66         protected $didYouMeanHtml, $fulltext;
  67
  68         const NAMESPACES_CURRENT = 'sense';
  69
  70         public function __construct() {
  71                 parent::__construct( 'Search' );
  72         }
  73
  74         /**
  75          * Entry point
  76          *
  77          * @param string $par
  78          */
  79         public function execute( $par ) {
  80                 $this->setHeaders();
  81                 $this->outputHeader();
  82                 $out = $this->getOutput();
  83                 $out->allowClickjacking();
  84                 $out->addModuleStyles( array(
  85                         'mediawiki.special', 'mediawiki.special.search', 'mediawiki.ui', 'mediawiki.ui.button',
  86                         'mediawiki.ui.input',
  87                 ) );
  88
  89                 // Strip underscores from title parameter; most of the time we'll want
  90                 // text form here. But don't strip underscores from actual text params!
  91                 $titleParam = str_replace( '_', ' ', $par );
  92
  93                 $request = $this->getRequest();
  94
  95                 // Fetch the search term
  96                 $search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );
  97
  98                 $this->load();
  99                 if ( !is_null( $request->getVal( 'nsRemember' ) ) ) {
 100                         $this->saveNamespaces();
 101                         // Remove the token from the URL to prevent the user from inadvertently
 102                         // exposing it (e.g. by pasting it into a public wiki page) or undoing
 103                         // later settings changes (e.g. by reloading the page).
 104                         $query = $request->getValues();
 105                         unset( $query['title'], $query['nsRemember'] );
 106                         $out->redirect( $this->getPageTitle()->getFullURL( $query ) );
 107                         return;
 108                 }
 109
 110                 $this->searchEngineType = $request->getVal( 'srbackend' );
 111
 112                 if ( $request->getVal( 'fulltext' )
 113                         || !is_null( $request->getVal( 'offset' ) )
 114                 ) {
 115                         $this->showResults( $search );
 116                 } else {
 117                         $this->goResult( $search );
 118                 }
 119         }
 120
 121         /**
 122          * Set up basic search parameters from the request and user settings.
 123          *
 124          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 125          */
 126         public function load() {
 127                 $request = $this->getRequest();
 128                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '' );
 129                 $this->mPrefix = $request->getVal( 'prefix', '' );
 130
 131                 $user = $this->getUser();
 132
 133                 # Extract manually requested namespaces
 134                 $nslist = $this->powerSearch( $request );
 135                 if ( !count( $nslist ) ) {
 136                         # Fallback to user preference
 137                         $nslist = SearchEngine::userNamespaces( $user );
 138                 }
 139
 140                 $profile = null;
 141                 if ( !count( $nslist ) ) {
 142                         $profile = 'default';
 143                 }
 144
 145                 $profile = $request->getVal( 'profile', $profile );
 146                 $profiles = $this->getSearchProfiles();
 147                 if ( $profile === null ) {
 148                         // BC with old request format
 149                         $profile = 'advanced';
 150                         foreach ( $profiles as $key => $data ) {
 151                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 152                                         $profile = $key;
 153                                 }
 154                         }
 155                         $this->namespaces = $nslist;
 156                 } elseif ( $profile === 'advanced' ) {
 157                         $this->namespaces = $nslist;
 158                 } else {
 159                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 160                                 $this->namespaces = $profiles[$profile]['namespaces'];
 161                         } else {
 162                                 // Unknown profile requested
 163                                 $profile = 'default';
 164                                 $this->namespaces = $profiles['default']['namespaces'];
 165                         }
 166                 }
 167
 168                 $this->didYouMeanHtml = ''; # html of did you mean... link
 169                 $this->fulltext = $request->getVal( 'fulltext' );
 170                 $this->profile = $profile;
 171         }
 172
 173         /**
 174          * If an exact title match can be found, jump straight ahead to it.
 175          *
 176          * @param string $term
 177          */
 178         public function goResult( $term ) {
 179                 $this->setupPage( $term );
 180                 # Try to go to page as entered.
 181                 $title = Title::newFromText( $term );
 182                 # If the string cannot be used to create a title
 183                 if ( is_null( $title ) ) {
 184                         $this->showResults( $term );
 185
 186                         return;
 187                 }
 188                 # If there's an exact or very near match, jump right there.
 189                 $title = SearchEngine::getNearMatch( $term );
 190
 191                 if ( !is_null( $title ) ) {
 192                         $this->getOutput()->redirect( $title->getFullURL() );
 193
 194                         return;
 195                 }
 196                 # No match, generate an edit URL
 197                 $title = Title::newFromText( $term );
 198                 if ( !is_null( $title ) ) {
 199                         wfRunHooks( 'SpecialSearchNogomatch', array( &$title ) );
 200                         wfDebugLog( 'nogomatch', $title->getFullText(), 'private' );
 201
 202                         # If the feature is enabled, go straight to the edit page
 203                         if ( $this->getConfig()->get( 'GoToEdit' ) ) {
 204                                 $this->getOutput()->redirect( $title->getFullURL( array( 'action' => 'edit' ) ) );
 205
 206                                 return;
 207                         }
 208                 }
 209                 $this->showResults( $term );
 210         }
 211
 212         /**
 213          * @param string $term
 214          */
 215         public function showResults( $term ) {
 216                 global $wgContLang;
 217
 218                 $profile = new ProfileSection( __METHOD__ );
 219                 $search = $this->getSearchEngine();
 220                 $search->setLimitOffset( $this->limit, $this->offset );
 221                 $search->setNamespaces( $this->namespaces );
 222                 $search->prefix = $this->mPrefix;
 223                 $term = $search->transformSearchTerm( $term );
 224
 225                 wfRunHooks( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 226
 227                 $this->setupPage( $term );
 228
 229                 $out = $this->getOutput();
 230
 231                 if ( $this->getConfig()->get( 'DisableTextSearch' ) ) {
 232                         $searchFowardUrl = $this->getConfig()->get( 'SearchForwardUrl' );
 233                         if ( $searchFowardUrl ) {
 234                                 $url = str_replace( '$1', urlencode( $term ), $searchFowardUrl );
 235                                 $out->redirect( $url );
 236                         } else {
 237                                 $out->addHTML(
 238                                         Xml::openElement( 'fieldset' ) .
 239                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 240                                         Xml::element(
 241                                                 'p',
 242                                                 array( 'class' => 'mw-searchdisabled' ),
 243                                                 $this->msg( 'searchdisabled' )->text()
 244                                         ) .
 245                                         $this->msg( 'googlesearch' )->rawParams(
 246                                                 htmlspecialchars( $term ),
 247                                                 'UTF-8',
 248                                                 $this->msg( 'searchbutton' )->escaped()
 249                                         )->text() .
 250                                         Xml::closeElement( 'fieldset' )
 251                                 );
 252                         }
 253
 254                         return;
 255                 }
 256
 257                 $title = Title::newFromText( $term );
 258                 $showSuggestion = $title === null || !$title->isKnown();
 259                 $search->setShowSuggestion( $showSuggestion );
 260
 261                 // fetch search results
 262                 $rewritten = $search->replacePrefixes( $term );
 263
 264                 $titleMatches = $search->searchTitle( $rewritten );
 265                 $textMatches = $search->searchText( $rewritten );
 266
 267                 $textStatus = null;
 268                 if ( $textMatches instanceof Status ) {
 269                         $textStatus = $textMatches;
 270                         $textMatches = null;
 271                 }
 272
 273                 // did you mean... suggestions
 274                 if ( $showSuggestion && $textMatches && !$textStatus && $textMatches->hasSuggestion() ) {
 275                         # mirror Go/Search behavior of original request ..
 276                         $didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );
 277
 278                         if ( $this->fulltext != null ) {
 279                                 $didYouMeanParams['fulltext'] = $this->fulltext;
 280                         }
 281
 282                         $stParams = array_merge(
 283                                 $didYouMeanParams,
 284                                 $this->powerSearchOptions()
 285                         );
 286
 287                         $suggestionSnippet = $textMatches->getSuggestionSnippet();
 288
 289                         if ( $suggestionSnippet == '' ) {
 290                                 $suggestionSnippet = null;
 291                         }
 292
 293                         $suggestLink = Linker::linkKnown(
 294                                 $this->getPageTitle(),
 295                                 $suggestionSnippet,
 296                                 array(),
 297                                 $stParams
 298                         );
 299
 300                         $this->didYouMeanHtml = '<div class="searchdidyoumean">'
 301                                 . $this->msg( 'search-suggest' )->rawParams( $suggestLink )->text() . '</div>';
 302                 }
 303
 304                 if ( !wfRunHooks( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 305                         # Hook requested termination
 306                         return;
 307                 }
 308
 309                 // start rendering the page
 310                 $out->addHtml(
 311                         Xml::openElement(
 312                                 'form',
 313                                 array(
 314                                         'id' => ( $this->profile === 'advanced' ? 'powersearch' : 'search' ),
 315                                         'method' => 'get',
 316                                         'action' => wfScript(),
 317                                 )
 318                         )
 319                 );
 320
 321                 // Get number of results
 322                 $titleMatchesNum = $textMatchesNum = $numTitleMatches = $numTextMatches = 0;
 323                 if ( $titleMatches ) {
 324                         $titleMatchesNum = $titleMatches->numRows();
 325                         $numTitleMatches = $titleMatches->getTotalHits();
 326                 }
 327                 if ( $textMatches ) {
 328                         $textMatchesNum = $textMatches->numRows();
 329                         $numTextMatches = $textMatches->getTotalHits();
 330                 }
 331                 $num = $titleMatchesNum + $textMatchesNum;
 332                 $totalRes = $numTitleMatches + $numTextMatches;
 333
 334                 $out->addHtml(
 335                         # This is an awful awful ID name. It's not a table, but we
 336                         # named it poorly from when this was a table so now we're
 337                         # stuck with it
 338                         Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
 339                         $this->shortDialog( $term, $num, $totalRes ) .
 340                         Xml::closeElement( 'div' ) .
 341                         $this->formHeader( $term ) .
 342                         Xml::closeElement( 'form' )
 343                 );
 344
 345                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 346                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 347                         // Empty query -- straight view of search form
 348                         return;
 349                 }
 350
 351                 $out->addHtml( "<div class='searchresults'>" );
 352
 353                 // prev/next links
 354                 $prevnext = null;
 355                 if ( $num || $this->offset ) {
 356                         // Show the create link ahead
 357                         $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 358                         if ( $totalRes > $this->limit || $this->offset ) {
 359                                 if ( $this->searchEngineType !== null ) {
 360                                         $this->setExtraParam( 'srbackend', $this->searchEngineType );
 361                                 }
 362                                 $prevnext = $this->getLanguage()->viewPrevNext(
 363                                         $this->getPageTitle(),
 364                                         $this->offset,
 365                                         $this->limit,
 366                                         $this->powerSearchOptions() + array( 'search' => $term ),
 367                                         $this->limit + $this->offset >= $totalRes
 368                                 );
 369                         }
 370                 }
 371                 wfRunHooks( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 372
 373                 $out->parserOptions()->setEditSection( false );
 374                 if ( $titleMatches ) {
 375                         if ( $numTitleMatches > 0 ) {
 376                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 377                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 378                         }
 379                         $titleMatches->free();
 380                 }
 381                 if ( $textMatches && !$textStatus ) {
 382                         // output appropriate heading
 383                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 384                                 // if no title matches the heading is redundant
 385                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 386                         }
 387
 388                         // show interwiki results if any
 389                         if ( $textMatches->hasInterwikiResults() ) {
 390                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 391                         }
 392                         // show results
 393                         if ( $numTextMatches > 0 ) {
 394                                 $out->addHTML( $this->showMatches( $textMatches ) );
 395                         }
 396
 397                         $textMatches->free();
 398                 }
 399                 if ( $num === 0 ) {
 400                         if ( $textStatus ) {
 401                                 $out->addHTML( '<div class="error">' .
 402                                         $textStatus->getMessage( 'search-error' ) . '</div>' );
 403                         } else {
 404                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 405                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 406                                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 407                         }
 408                 }
 409                 $out->addHtml( "</div>" );
 410
 411                 if ( $prevnext ) {
 412                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 413                 }
 414         }
 415
 416         /**
 417          * @param Title $title
 418          * @param int $num The number of search results found
 419          * @param null|SearchResultSet $titleMatches Results from title search
 420          * @param null|SearchResultSet $textMatches Results from text search
 421          */
 422         protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
 423                 // show direct page/create link if applicable
 424
 425                 // Check DBkey !== '' in case of fragment link only.
 426                 if ( is_null( $title ) || $title->getDBkey() === ''
 427                         || ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
 428                         || ( $textMatches !== null && $textMatches->searchContainedSyntax() )
 429                 ) {
 430                         // invalid title
 431                         // preserve the paragraph for margins etc...
 432                         $this->getOutput()->addHtml( '<p></p>' );
 433
 434                         return;
 435                 }
 436
 437                 $linkClass = 'mw-search-createlink';
 438                 if ( $title->isKnown() ) {
 439                         $messageName = 'searchmenu-exists';
 440                         $linkClass = 'mw-search-exists';
 441                 } elseif ( $title->quickUserCan( 'create', $this->getUser() ) ) {
 442                         $messageName = 'searchmenu-new';
 443                 } else {
 444                         $messageName = 'searchmenu-new-nocreate';
 445                 }
 446                 $params = array(
 447                         $messageName,
 448                         wfEscapeWikiText( $title->getPrefixedText() ),
 449                         Message::numParam( $num )
 450                 );
 451                 wfRunHooks( 'SpecialSearchCreateLink', array( $title, &$params ) );
 452
 453                 // Extensions using the hook might still return an empty $messageName
 454                 if ( $messageName ) {
 455                         $this->getOutput()->wrapWikiMsg( "<p class=\"$linkClass\">\n$1</p>", $params );
 456                 } else {
 457                         // preserve the paragraph for margins etc...
 458                         $this->getOutput()->addHtml( '<p></p>' );
 459                 }
 460         }
 461
 462         /**
 463          * @param string $term
 464          */
 465         protected function setupPage( $term ) {
 466                 # Should advanced UI be used?
 467                 $this->searchAdvanced = ( $this->profile === 'advanced' );
 468                 $out = $this->getOutput();
 469                 if ( strval( $term ) !== '' ) {
 470                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 471                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 472                                 ->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
 473                                 ->inContentLanguage()->text()
 474                         );
 475                 }
 476                 // add javascript specific to special:search
 477                 $out->addModules( 'mediawiki.special.search' );
 478         }
 479
 480         /**
 481          * Extract "power search" namespace settings from the request object,
 482          * returning a list of index numbers to search.
 483          *
 484          * @param WebRequest $request
 485          * @return array
 486          */
 487         protected function powerSearch( &$request ) {
 488                 $arr = array();
 489                 foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
 490                         if ( $request->getCheck( 'ns' . $ns ) ) {
 491                                 $arr[] = $ns;
 492                         }
 493                 }
 494
 495                 return $arr;
 496         }
 497
 498         /**
 499          * Reconstruct the 'power search' options for links
 500          *
 501          * @return array
 502          */
 503         protected function powerSearchOptions() {
 504                 $opt = array();
 505                 if ( $this->profile !== 'advanced' ) {
 506                         $opt['profile'] = $this->profile;
 507                 } else {
 508                         foreach ( $this->namespaces as $n ) {
 509                                 $opt['ns' . $n] = 1;
 510                         }
 511                 }
 512
 513                 return $opt + $this->extraParams;
 514         }
 515
 516         /**
 517          * Save namespace preferences when we're supposed to
 518          *
 519          * @return bool Whether we wrote something
 520          */
 521         protected function saveNamespaces() {
 522                 $user = $this->getUser();
 523                 $request = $this->getRequest();
 524
 525                 if ( $user->isLoggedIn() &&
 526                         $user->matchEditToken(
 527                                 $request->getVal( 'nsRemember' ),
 528                                 'searchnamespace',
 529                                 $request
 530                         )
 531                 ) {
 532                         // Reset namespace preferences: namespaces are not searched
 533                         // when they're not mentioned in the URL parameters.
 534                         foreach ( MWNamespace::getValidNamespaces() as $n ) {
 535                                 $user->setOption( 'searchNs' . $n, false );
 536                         }
 537                         // The request parameters include all the namespaces to be searched.
 538                         // Even if they're the same as an existing profile, they're not eaten.
 539                         foreach ( $this->namespaces as $n ) {
 540                                 $user->setOption( 'searchNs' . $n, true );
 541                         }
 542
 543                         $user->saveSettings();
 544                         return true;
 545                 }
 546
 547                 return false;
 548         }
 549
 550         /**
 551          * Show whole set of results
 552          *
 553          * @param SearchResultSet $matches
 554          *
 555          * @return string
 556          */
 557         protected function showMatches( &$matches ) {
 558                 global $wgContLang;
 559
 560                 $profile = new ProfileSection( __METHOD__ );
 561                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 562
 563                 $out = "<ul class='mw-search-results'>\n";
 564                 $result = $matches->next();
 565                 while ( $result ) {
 566                         $out .= $this->showHit( $result, $terms );
 567                         $result = $matches->next();
 568                 }
 569                 $out .= "</ul>\n";
 570
 571                 // convert the whole thing to desired language variant
 572                 $out = $wgContLang->convert( $out );
 573
 574                 return $out;
 575         }
 576
 577         /**
 578          * Format a single hit result
 579          *
 580          * @param SearchResult $result
 581          * @param array $terms Terms to highlight
 582          *
 583          * @return string
 584          */
 585         protected function showHit( $result, $terms ) {
 586                 $profile = new ProfileSection( __METHOD__ );
 587
 588                 if ( $result->isBrokenTitle() ) {
 589                         return '';
 590                 }
 591
 592                 $title = $result->getTitle();
 593
 594                 $titleSnippet = $result->getTitleSnippet( $terms );
 595
 596                 if ( $titleSnippet == '' ) {
 597                         $titleSnippet = null;
 598                 }
 599
 600                 $link_t = clone $title;
 601
 602                 wfRunHooks( 'ShowSearchHitTitle',
 603                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 604
 605                 $link = Linker::linkKnown(
 606                         $link_t,
 607                         $titleSnippet
 608                 );
 609
 610                 //If page content is not readable, just return the title.
 611                 //This is not quite safe, but better than showing excerpts from non-readable pages
 612                 //Note that hiding the entry entirely would screw up paging.
 613                 if ( !$title->userCan( 'read', $this->getUser() ) ) {
 614                         return "<li>{$link}</li>\n";
 615                 }
 616
 617                 // If the page doesn't *exist*... our search index is out of date.
 618                 // The least confusing at this point is to drop the result.
 619                 // You may get less results, but... oh well. :P
 620                 if ( $result->isMissingRevision() ) {
 621                         return '';
 622                 }
 623
 624                 // format redirects / relevant sections
 625                 $redirectTitle = $result->getRedirectTitle();
 626                 $redirectText = $result->getRedirectSnippet( $terms );
 627                 $sectionTitle = $result->getSectionTitle();
 628                 $sectionText = $result->getSectionSnippet( $terms );
 629                 $redirect = '';
 630
 631                 if ( !is_null( $redirectTitle ) ) {
 632                         if ( $redirectText == '' ) {
 633                                 $redirectText = null;
 634                         }
 635
 636                         $redirect = "<span class='searchalttitle'>" .
 637                                 $this->msg( 'search-redirect' )->rawParams(
 638                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 639                                 "</span>";
 640                 }
 641
 642                 $section = '';
 643
 644                 if ( !is_null( $sectionTitle ) ) {
 645                         if ( $sectionText == '' ) {
 646                                 $sectionText = null;
 647                         }
 648
 649                         $section = "<span class='searchalttitle'>" .
 650                                 $this->msg( 'search-section' )->rawParams(
 651                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 652                                 "</span>";
 653                 }
 654
 655                 // format text extract
 656                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 657
 658                 $lang = $this->getLanguage();
 659
 660                 // format description
 661                 $byteSize = $result->getByteSize();
 662                 $wordCount = $result->getWordCount();
 663                 $timestamp = $result->getTimestamp();
 664                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 665                         ->numParams( $wordCount )->escaped();
 666
 667                 if ( $title->getNamespace() == NS_CATEGORY ) {
 668                         $cat = Category::newFromTitle( $title );
 669                         $size = $this->msg( 'search-result-category-size' )
 670                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 671                                 ->escaped();
 672                 }
 673
 674                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 675
 676                 $fileMatch = '';
 677                 // Include a thumbnail for media files...
 678                 if ( $title->getNamespace() == NS_FILE ) {
 679                         $img = $result->getFile();
 680                         $img = $img ?: wfFindFile( $title );
 681                         if ( $result->isFileMatch() ) {
 682                                 $fileMatch = "<span class='searchalttitle'>" .
 683                                         $this->msg( 'search-file-match' )->escaped() . "</span>";
 684                         }
 685                         if ( $img ) {
 686                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 687                                 if ( $thumb ) {
 688                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 689                                         // Float doesn't seem to interact well with the bullets.
 690                                         // Table messes up vertical alignment of the bullets.
 691                                         // Bullets are therefore disabled (didn't look great anyway).
 692                                         return "<li>" .
 693                                                 '<table class="searchResultImage">' .
 694                                                 '<tr>' .
 695                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 696                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 697                                                 '</td>' .
 698                                                 '<td style="vertical-align: top;">' .
 699                                                 "{$link} {$redirect} {$section} {$fileMatch}" .
 700                                                 $extract .
 701                                                 "<div class='mw-search-result-data'>{$desc} - {$date}</div>" .
 702                                                 '</td>' .
 703                                                 '</tr>' .
 704                                                 '</table>' .
 705                                                 "</li>\n";
 706                                 }
 707                         }
 708                 }
 709
 710                 $html = null;
 711
 712                 $score = '';
 713                 if ( wfRunHooks( 'ShowSearchHit', array(
 714                         $this, $result, $terms,
 715                         &$link, &$redirect, &$section, &$extract,
 716                         &$score, &$size, &$date, &$related,
 717                         &$html
 718                 ) ) ) {
 719                         $html = "<li><div class='mw-search-result-heading'>" .
 720                                 "{$link} {$redirect} {$section} {$fileMatch}</div> {$extract}\n" .
 721                                 "<div class='mw-search-result-data'>{$size} - {$date}</div>" .
 722                                 "</li>\n";
 723                 }
 724
 725                 return $html;
 726         }
 727
 728         /**
 729          * Show results from other wikis
 730          *
 731          * @param SearchResultSet|array $matches
 732          * @param string $query
 733          *
 734          * @return string
 735          */
 736         protected function showInterwiki( $matches, $query ) {
 737                 global $wgContLang;
 738                 $profile = new ProfileSection( __METHOD__ );
 739
 740                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 741                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 742                 $out .= "<ul class='mw-search-iwresults'>\n";
 743
 744                 // work out custom project captions
 745                 $customCaptions = array();
 746                 // format per line <iwprefix>:<caption>
 747                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() );
 748                 foreach ( $customLines as $line ) {
 749                         $parts = explode( ":", $line, 2 );
 750                         if ( count( $parts ) == 2 ) { // validate line
 751                                 $customCaptions[$parts[0]] = $parts[1];
 752                         }
 753                 }
 754
 755                 if ( !is_array( $matches ) ) {
 756                         $matches = array( $matches );
 757                 }
 758
 759                 foreach ( $matches as $set ) {
 760                         $prev = null;
 761                         $result = $set->next();
 762                         while ( $result ) {
 763                                 $out .= $this->showInterwikiHit( $result, $prev, $query, $customCaptions );
 764                                 $prev = $result->getInterwikiPrefix();
 765                                 $result = $set->next();
 766                         }
 767                 }
 768
 769                 // @todo Should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 770                 $out .= "</ul></div>\n";
 771
 772                 // convert the whole thing to desired language variant
 773                 $out = $wgContLang->convert( $out );
 774
 775                 return $out;
 776         }
 777
 778         /**
 779          * Show single interwiki link
 780          *
 781          * @param SearchResult $result
 782          * @param string $lastInterwiki
 783          * @param string $query
 784          * @param array $customCaptions Interwiki prefix -> caption
 785          *
 786          * @return string
 787          */
 788         protected function showInterwikiHit( $result, $lastInterwiki, $query, $customCaptions ) {
 789                 $profile = new ProfileSection( __METHOD__ );
 790
 791                 if ( $result->isBrokenTitle() ) {
 792                         return '';
 793                 }
 794
 795                 $title = $result->getTitle();
 796
 797                 $titleSnippet = $result->getTitleSnippet();
 798
 799                 if ( $titleSnippet == '' ) {
 800                         $titleSnippet = null;
 801                 }
 802
 803                 $link = Linker::linkKnown(
 804                         $title,
 805                         $titleSnippet
 806                 );
 807
 808                 // format redirect if any
 809                 $redirectTitle = $result->getRedirectTitle();
 810                 $redirectText = $result->getRedirectSnippet();
 811                 $redirect = '';
 812                 if ( !is_null( $redirectTitle ) ) {
 813                         if ( $redirectText == '' ) {
 814                                 $redirectText = null;
 815                         }
 816
 817                         $redirect = "<span class='searchalttitle'>" .
 818                                 $this->msg( 'search-redirect' )->rawParams(
 819                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 820                                 "</span>";
 821                 }
 822
 823                 $out = "";
 824                 // display project name
 825                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $title->getInterwiki() ) {
 826                         if ( array_key_exists( $title->getInterwiki(), $customCaptions ) ) {
 827                                 // captions from 'search-interwiki-custom'
 828                                 $caption = $customCaptions[$title->getInterwiki()];
 829                         } else {
 830                                 // default is to show the hostname of the other wiki which might suck
 831                                 // if there are many wikis on one hostname
 832                                 $parsed = wfParseUrl( $title->getFullURL() );
 833                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 834                         }
 835                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 836                         $searchTitle = Title::newFromText( $title->getInterwiki() . ":Special:Search" );
 837                         $searchLink = Linker::linkKnown(
 838                                 $searchTitle,
 839                                 $this->msg( 'search-interwiki-more' )->text(),
 840                                 array(),
 841                                 array(
 842                                         'search' => $query,
 843                                         'fulltext' => 'Search'
 844                                 )
 845                         );
 846                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 847                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 848                 }
 849
 850                 $out .= "<li>{$link} {$redirect}</li>\n";
 851
 852                 return $out;
 853         }
 854
 855         /**
 856          * Generates the power search box at [[Special:Search]]
 857          *
 858          * @param string $term Search term
 859          * @param array $opts
 860          * @return string HTML form
 861          */
 862         protected function powerSearchBox( $term, $opts ) {
 863                 global $wgContLang;
 864
 865                 // Groups namespaces into rows according to subject
 866                 $rows = array();
 867                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 868                         $subject = MWNamespace::getSubject( $namespace );
 869                         if ( !array_key_exists( $subject, $rows ) ) {
 870                                 $rows[$subject] = "";
 871                         }
 872
 873                         $name = $wgContLang->getConverter()->convertNamespace( $namespace );
 874                         if ( $name == '' ) {
 875                                 $name = $this->msg( 'blanknamespace' )->text();
 876                         }
 877
 878                         $rows[$subject] .=
 879                                 Xml::openElement( 'td' ) .
 880                                 Xml::checkLabel(
 881                                         $name,
 882                                         "ns{$namespace}",
 883                                         "mw-search-ns{$namespace}",
 884                                         in_array( $namespace, $this->namespaces )
 885                                 ) .
 886                                 Xml::closeElement( 'td' );
 887                 }
 888
 889                 $rows = array_values( $rows );
 890                 $numRows = count( $rows );
 891
 892                 // Lays out namespaces in multiple floating two-column tables so they'll
 893                 // be arranged nicely while still accommodating different screen widths
 894                 $namespaceTables = '';
 895                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 896                         $namespaceTables .= Xml::openElement(
 897                                 'table',
 898                                 array( 'cellpadding' => 0, 'cellspacing' => 0 )
 899                         );
 900
 901                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 902                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 903                         }
 904
 905                         $namespaceTables .= Xml::closeElement( 'table' );
 906                 }
 907
 908                 $showSections = array( 'namespaceTables' => $namespaceTables );
 909
 910                 wfRunHooks( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 911
 912                 $hidden = '';
 913                 foreach ( $opts as $key => $value ) {
 914                         $hidden .= Html::hidden( $key, $value );
 915                 }
 916
 917                 # Stuff to feed saveNamespaces()
 918                 $remember = '';
 919                 $user = $this->getUser();
 920                 if ( $user->isLoggedIn() ) {
 921                         $remember .= Xml::checkLabel(
 922                                 wfMessage( 'powersearch-remember' )->text(),
 923                                 'nsRemember',
 924                                 'mw-search-powersearch-remember',
 925                                 false,
 926                                 // The token goes here rather than in a hidden field so it
 927                                 // is only sent when necessary (not every form submission).
 928                                 array( 'value' => $user->getEditToken(
 929                                         'searchnamespace',
 930                                         $this->getRequest()
 931                                 ) )
 932                         );
 933                 }
 934
 935                 // Return final output
 936                 return Xml::openElement( 'fieldset', array( 'id' => 'mw-searchoptions' ) ) .
 937                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
 938                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
 939                         Xml::element( 'div', array( 'id' => 'mw-search-togglebox' ), '', false ) .
 940                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
 941                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
 942                         $hidden .
 943                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
 944                         $remember .
 945                         Xml::closeElement( 'fieldset' );
 946         }
 947
 948         /**
 949          * @return array
 950          */
 951         protected function getSearchProfiles() {
 952                 // Builds list of Search Types (profiles)
 953                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
 954
 955                 $profiles = array(
 956                         'default' => array(
 957                                 'message' => 'searchprofile-articles',
 958                                 'tooltip' => 'searchprofile-articles-tooltip',
 959                                 'namespaces' => SearchEngine::defaultNamespaces(),
 960                                 'namespace-messages' => SearchEngine::namespacesAsText(
 961                                         SearchEngine::defaultNamespaces()
 962                                 ),
 963                         ),
 964                         'images' => array(
 965                                 'message' => 'searchprofile-images',
 966                                 'tooltip' => 'searchprofile-images-tooltip',
 967                                 'namespaces' => array( NS_FILE ),
 968                         ),
 969                         'all' => array(
 970                                 'message' => 'searchprofile-everything',
 971                                 'tooltip' => 'searchprofile-everything-tooltip',
 972                                 'namespaces' => $nsAllSet,
 973                         ),
 974                         'advanced' => array(
 975                                 'message' => 'searchprofile-advanced',
 976                                 'tooltip' => 'searchprofile-advanced-tooltip',
 977                                 'namespaces' => self::NAMESPACES_CURRENT,
 978                         )
 979                 );
 980
 981                 wfRunHooks( 'SpecialSearchProfiles', array( &$profiles ) );
 982
 983                 foreach ( $profiles as &$data ) {
 984                         if ( !is_array( $data['namespaces'] ) ) {
 985                                 continue;
 986                         }
 987                         sort( $data['namespaces'] );
 988                 }
 989
 990                 return $profiles;
 991         }
 992
 993         /**
 994          * @param string $term
 995          * @return string
 996          */
 997         protected function formHeader( $term ) {
 998                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-formheader' ) );
 999
1000                 $bareterm = $term;
1001                 if ( $this->startsWithImage( $term ) ) {
1002                         // Deletes prefixes
1003                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1004                 }
1005
1006                 $profiles = $this->getSearchProfiles();
1007                 $lang = $this->getLanguage();
1008
1009                 // Outputs XML for Search Types
1010                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1011                 $out .= Xml::openElement( 'ul' );
1012                 foreach ( $profiles as $id => $profile ) {
1013                         if ( !isset( $profile['parameters'] ) ) {
1014                                 $profile['parameters'] = array();
1015                         }
1016                         $profile['parameters']['profile'] = $id;
1017
1018                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1019                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1020                         $out .= Xml::tags(
1021                                 'li',
1022                                 array(
1023                                         'class' => $this->profile === $id ? 'current' : 'normal'
1024                                 ),
1025                                 $this->makeSearchLink(
1026                                         $bareterm,
1027                                         array(),
1028                                         $this->msg( $profile['message'] )->text(),
1029                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1030                                         $profile['parameters']
1031                                 )
1032                         );
1033                 }
1034                 $out .= Xml::closeElement( 'ul' );
1035                 $out .= Xml::closeElement( 'div' );
1036                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1037                 $out .= Xml::closeElement( 'div' );
1038
1039                 // Hidden stuff
1040                 $opts = array();
1041                 $opts['profile'] = $this->profile;
1042
1043                 if ( $this->profile === 'advanced' ) {
1044                         $out .= $this->powerSearchBox( $term, $opts );
1045                 } else {
1046                         $form = '';
1047                         wfRunHooks( 'SpecialSearchProfileForm', array( $this, &$form, $this->profile, $term, $opts ) );
1048                         $out .= $form;
1049                 }
1050
1051                 return $out;
1052         }
1053
1054         /**
1055          * @param string $term
1056          * @param int $resultsShown
1057          * @param int $totalNum
1058          * @return string
1059          */
1060         protected function shortDialog( $term, $resultsShown, $totalNum ) {
1061                 $out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
1062                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1063                 // Term box
1064                 $out .= Html::input( 'search', $term, 'search', array(
1065                         'id' => $this->profile === 'advanced' ? 'powerSearchText' : 'searchText',
1066                         'size' => '50',
1067                         'autofocus',
1068                         'class' => 'mw-ui-input mw-ui-input-inline',
1069                 ) ) . "\n";
1070                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1071                 $out .= Xml::submitButton(
1072                         $this->msg( 'searchbutton' )->text(),
1073                         array( 'class' => array( 'mw-ui-button', 'mw-ui-progressive' ) )
1074                 ) . "\n";
1075
1076                 // Results-info
1077                 if ( $totalNum > 0 && $this->offset < $totalNum ) {
1078                         $top = $this->msg( 'search-showingresults' )
1079                                 ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1080                                 ->numParams( $resultsShown )
1081                                 ->parse();
1082                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ), $top ) .
1083                                 Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1084                 }
1085
1086                 return $out . $this->didYouMeanHtml;
1087         }
1088
1089         /**
1090          * Make a search link with some target namespaces
1091          *
1092          * @param string $term
1093          * @param array $namespaces Ignored
1094          * @param string $label Link's text
1095          * @param string $tooltip Link's tooltip
1096          * @param array $params Query string parameters
1097          * @return string HTML fragment
1098          */
1099         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1100                 $opt = $params;
1101                 foreach ( $namespaces as $n ) {
1102                         $opt['ns' . $n] = 1;
1103                 }
1104
1105                 $stParams = array_merge(
1106                         array(
1107                                 'search' => $term,
1108                                 'fulltext' => $this->msg( 'search' )->text()
1109                         ),
1110                         $opt
1111                 );
1112
1113                 return Xml::element(
1114                         'a',
1115                         array(
1116                                 'href' => $this->getPageTitle()->getLocalURL( $stParams ),
1117                                 'title' => $tooltip
1118                         ),
1119                         $label
1120                 );
1121         }
1122
1123         /**
1124          * Check if query starts with image: prefix
1125          *
1126          * @param string $term The string to check
1127          * @return bool
1128          */
1129         protected function startsWithImage( $term ) {
1130                 global $wgContLang;
1131
1132                 $parts = explode( ':', $term );
1133                 if ( count( $parts ) > 1 ) {
1134                         return $wgContLang->getNsIndex( $parts[0] ) == NS_FILE;
1135                 }
1136
1137                 return false;
1138         }
1139
1140         /**
1141          * Check if query starts with all: prefix
1142          *
1143          * @param string $term The string to check
1144          * @return bool
1145          */
1146         protected function startsWithAll( $term ) {
1147
1148                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1149
1150                 $parts = explode( ':', $term );
1151                 if ( count( $parts ) > 1 ) {
1152                         return $parts[0] == $allkeyword;
1153                 }
1154
1155                 return false;
1156         }
1157
1158         /**
1159          * @since 1.18
1160          *
1161          * @return SearchEngine
1162          */
1163         public function getSearchEngine() {
1164                 if ( $this->searchEngine === null ) {
1165                         $this->searchEngine = $this->searchEngineType ?
1166                                 SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
1167                 }
1168
1169                 return $this->searchEngine;
1170         }
1171
1172         /**
1173          * Current search profile.
1174          * @return null|string
1175          */
1176         function getProfile() {
1177                 return $this->profile;
1178         }
1179
1180         /**
1181          * Current namespaces.
1182          * @return array
1183          */
1184         function getNamespaces() {
1185                 return $this->namespaces;
1186         }
1187
1188         /**
1189          * Users of hook SpecialSearchSetupEngine can use this to
1190          * add more params to links to not lose selection when
1191          * user navigates search results.
1192          * @since 1.18
1193          *
1194          * @param string $key
1195          * @param mixed $value
1196          */
1197         public function setExtraParam( $key, $value ) {
1198                 $this->extraParams[$key] = $value;
1199         }
1200
1201         protected function getGroupName() {
1202                 return 'pages';
1203         }
1204 }