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                 ) );
  87
  88                 // Strip underscores from title parameter; most of the time we'll want
  89                 // text form here. But don't strip underscores from actual text params!
  90                 $titleParam = str_replace( '_', ' ', $par );
  91
  92                 $request = $this->getRequest();
  93
  94                 // Fetch the search term
  95                 $search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );
  96
  97                 $this->load();
  98
  99                 $this->searchEngineType = $request->getVal( 'srbackend' );
 100
 101                 if ( $request->getVal( 'fulltext' )
 102                         || !is_null( $request->getVal( 'offset' ) )
 103                 ) {
 104                         $this->showResults( $search );
 105                 } else {
 106                         $this->goResult( $search );
 107                 }
 108         }
 109
 110         /**
 111          * Set up basic search parameters from the request and user settings.
 112          *
 113          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 114          */
 115         public function load() {
 116                 $request = $this->getRequest();
 117                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20 );
 118                 $this->mPrefix = $request->getVal( 'prefix', '' );
 119
 120                 $user = $this->getUser();
 121
 122                 # Extract manually requested namespaces
 123                 $nslist = $this->powerSearch( $request );
 124                 if ( !count( $nslist ) ) {
 125                         # Fallback to user preference
 126                         $nslist = SearchEngine::userNamespaces( $user );
 127                 }
 128
 129                 $profile = null;
 130                 if ( !count( $nslist ) ) {
 131                         $profile = 'default';
 132                 }
 133
 134                 $profile = $request->getVal( 'profile', $profile );
 135                 $profiles = $this->getSearchProfiles();
 136                 if ( $profile === null ) {
 137                         // BC with old request format
 138                         $profile = 'advanced';
 139                         foreach ( $profiles as $key => $data ) {
 140                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 141                                         $profile = $key;
 142                                 }
 143                         }
 144                         $this->namespaces = $nslist;
 145                 } elseif ( $profile === 'advanced' ) {
 146                         $this->namespaces = $nslist;
 147                 } else {
 148                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 149                                 $this->namespaces = $profiles[$profile]['namespaces'];
 150                         } else {
 151                                 // Unknown profile requested
 152                                 $profile = 'default';
 153                                 $this->namespaces = $profiles['default']['namespaces'];
 154                         }
 155                 }
 156
 157                 $this->didYouMeanHtml = ''; # html of did you mean... link
 158                 $this->fulltext = $request->getVal( 'fulltext' );
 159                 $this->profile = $profile;
 160         }
 161
 162         /**
 163          * If an exact title match can be found, jump straight ahead to it.
 164          *
 165          * @param string $term
 166          */
 167         public function goResult( $term ) {
 168                 $this->setupPage( $term );
 169                 # Try to go to page as entered.
 170                 $title = Title::newFromText( $term );
 171                 # If the string cannot be used to create a title
 172                 if ( is_null( $title ) ) {
 173                         $this->showResults( $term );
 174
 175                         return;
 176                 }
 177                 # If there's an exact or very near match, jump right there.
 178                 $title = SearchEngine::getNearMatch( $term );
 179
 180                 if ( !is_null( $title ) ) {
 181                         $this->getOutput()->redirect( $title->getFullURL() );
 182
 183                         return;
 184                 }
 185                 # No match, generate an edit URL
 186                 $title = Title::newFromText( $term );
 187                 if ( !is_null( $title ) ) {
 188                         global $wgGoToEdit;
 189                         wfRunHooks( 'SpecialSearchNogomatch', array( &$title ) );
 190                         wfDebugLog( 'nogomatch', $title->getFullText(), 'private' );
 191
 192                         # If the feature is enabled, go straight to the edit page
 193                         if ( $wgGoToEdit ) {
 194                                 $this->getOutput()->redirect( $title->getFullURL( array( 'action' => 'edit' ) ) );
 195
 196                                 return;
 197                         }
 198                 }
 199                 $this->showResults( $term );
 200         }
 201
 202         /**
 203          * @param string $term
 204          */
 205         public function showResults( $term ) {
 206                 global $wgDisableTextSearch, $wgSearchForwardUrl, $wgContLang, $wgScript;
 207
 208                 $profile = new ProfileSection( __METHOD__ );
 209                 $search = $this->getSearchEngine();
 210                 $search->setLimitOffset( $this->limit, $this->offset );
 211                 $search->setNamespaces( $this->namespaces );
 212                 $this->saveNamespaces();
 213                 $search->prefix = $this->mPrefix;
 214                 $term = $search->transformSearchTerm( $term );
 215
 216                 wfRunHooks( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 217
 218                 $this->setupPage( $term );
 219
 220                 $out = $this->getOutput();
 221
 222                 if ( $wgDisableTextSearch ) {
 223                         if ( $wgSearchForwardUrl ) {
 224                                 $url = str_replace( '$1', urlencode( $term ), $wgSearchForwardUrl );
 225                                 $out->redirect( $url );
 226                         } else {
 227                                 $out->addHTML(
 228                                         Xml::openElement( 'fieldset' ) .
 229                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 230                                         Xml::element(
 231                                                 'p',
 232                                                 array( 'class' => 'mw-searchdisabled' ),
 233                                                 $this->msg( 'searchdisabled' )->text()
 234                                         ) .
 235                                         $this->msg( 'googlesearch' )->rawParams(
 236                                                 htmlspecialchars( $term ),
 237                                                 'UTF-8',
 238                                                 $this->msg( 'searchbutton' )->escaped()
 239                                         )->text() .
 240                                         Xml::closeElement( 'fieldset' )
 241                                 );
 242                         }
 243
 244                         return;
 245                 }
 246
 247                 $title = Title::newFromText( $term );
 248                 $showSuggestion = $title === null || !$title->isKnown();
 249                 $search->setShowSuggestion( $showSuggestion );
 250
 251                 // fetch search results
 252                 $rewritten = $search->replacePrefixes( $term );
 253
 254                 $titleMatches = $search->searchTitle( $rewritten );
 255                 if ( !( $titleMatches instanceof SearchResultTooMany ) ) {
 256                         $textMatches = $search->searchText( $rewritten );
 257                 }
 258
 259                 $textStatus = null;
 260                 if ( $textMatches instanceof Status ) {
 261                         $textStatus = $textMatches;
 262                         $textMatches = null;
 263                 }
 264
 265                 // did you mean... suggestions
 266                 if ( $showSuggestion && $textMatches && !$textStatus && $textMatches->hasSuggestion() ) {
 267                         # mirror Go/Search behavior of original request ..
 268                         $didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );
 269
 270                         if ( $this->fulltext != null ) {
 271                                 $didYouMeanParams['fulltext'] = $this->fulltext;
 272                         }
 273
 274                         $stParams = array_merge(
 275                                 $didYouMeanParams,
 276                                 $this->powerSearchOptions()
 277                         );
 278
 279                         $suggestionSnippet = $textMatches->getSuggestionSnippet();
 280
 281                         if ( $suggestionSnippet == '' ) {
 282                                 $suggestionSnippet = null;
 283                         }
 284
 285                         $suggestLink = Linker::linkKnown(
 286                                 $this->getPageTitle(),
 287                                 $suggestionSnippet,
 288                                 array(),
 289                                 $stParams
 290                         );
 291
 292                         $this->didYouMeanHtml = '<div class="searchdidyoumean">'
 293                                 . $this->msg( 'search-suggest' )->rawParams( $suggestLink )->text() . '</div>';
 294                 }
 295
 296                 if ( !wfRunHooks( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 297                         # Hook requested termination
 298                         return;
 299                 }
 300
 301                 // start rendering the page
 302                 $out->addHtml(
 303                         Xml::openElement(
 304                                 'form',
 305                                 array(
 306                                         'id' => ( $this->profile === 'advanced' ? 'powersearch' : 'search' ),
 307                                         'method' => 'get',
 308                                         'action' => $wgScript
 309                                 )
 310                         )
 311                 );
 312                 $out->addHtml(
 313                         # This is an awful awful ID name. It's not a table, but we
 314                         # named it poorly from when this was a table so now we're
 315                         # stuck with it
 316                         Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
 317                         $this->shortDialog( $term ) .
 318                         Xml::closeElement( 'div' )
 319                 );
 320
 321                 // Sometimes the search engine knows there are too many hits
 322                 if ( $titleMatches instanceof SearchResultTooMany ) {
 323                         $out->wrapWikiMsg( "==$1==\n", 'toomanymatches' );
 324
 325                         return;
 326                 }
 327
 328                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 329                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 330                         $out->addHTML( $this->formHeader( $term, 0, 0 ) );
 331                         $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 332                         $out->addHTML( '</form>' );
 333
 334                         // Empty query -- straight view of search form
 335                         return;
 336                 }
 337
 338                 // Get number of results
 339                 $titleMatchesNum = $titleMatches ? $titleMatches->numRows() : 0;
 340                 $textMatchesNum = $textMatches ? $textMatches->numRows() : 0;
 341                 // Total initial query matches (possible false positives)
 342                 $num = $titleMatchesNum + $textMatchesNum;
 343
 344                 // Get total actual results (after second filtering, if any)
 345                 $numTitleMatches = $titleMatches && !is_null( $titleMatches->getTotalHits() ) ?
 346                         $titleMatches->getTotalHits() : $titleMatchesNum;
 347                 $numTextMatches = $textMatches && !is_null( $textMatches->getTotalHits() ) ?
 348                         $textMatches->getTotalHits() : $textMatchesNum;
 349
 350                 // get total number of results if backend can calculate it
 351                 $totalRes = 0;
 352                 if ( $titleMatches && !is_null( $titleMatches->getTotalHits() ) ) {
 353                         $totalRes += $titleMatches->getTotalHits();
 354                 }
 355                 if ( $textMatches && !is_null( $textMatches->getTotalHits() ) ) {
 356                         $totalRes += $textMatches->getTotalHits();
 357                 }
 358
 359                 // show number of results and current offset
 360                 $out->addHTML( $this->formHeader( $term, $num, $totalRes ) );
 361                 $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 362
 363                 $out->addHtml( Xml::closeElement( 'form' ) );
 364                 $out->addHtml( "<div class='searchresults'>" );
 365
 366                 // prev/next links
 367                 $prevnext = null;
 368                 if ( $num || $this->offset ) {
 369                         // Show the create link ahead
 370                         $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 371                         if ( $totalRes > $this->limit || $this->offset ) {
 372                                 $prevnext = $this->getLanguage()->viewPrevNext(
 373                                         $this->getPageTitle(),
 374                                         $this->offset,
 375                                         $this->limit,
 376                                         $this->powerSearchOptions() + array( 'search' => $term ),
 377                                         max( $titleMatchesNum, $textMatchesNum ) < $this->limit
 378                                 );
 379                         }
 380                         wfRunHooks( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 381                 } else {
 382                         wfRunHooks( 'SpecialSearchNoResults', array( $term ) );
 383                 }
 384
 385                 $out->parserOptions()->setEditSection( false );
 386                 if ( $titleMatches ) {
 387                         if ( $numTitleMatches > 0 ) {
 388                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 389                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 390                         }
 391                         $titleMatches->free();
 392                 }
 393                 if ( $textMatches && !$textStatus ) {
 394                         // output appropriate heading
 395                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 396                                 // if no title matches the heading is redundant
 397                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 398                         }
 399
 400                         // show interwiki results if any
 401                         if ( $textMatches->hasInterwikiResults() ) {
 402                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 403                         }
 404                         // show results
 405                         if ( $numTextMatches > 0 ) {
 406                                 $out->addHTML( $this->showMatches( $textMatches ) );
 407                         }
 408
 409                         $textMatches->free();
 410                 }
 411                 if ( $num === 0 ) {
 412                         if ( $textStatus ) {
 413                                 $out->addHTML( '<div class="error">' .
 414                                         htmlspecialchars( $textStatus->getWikiText( 'search-error' ) ) . '</div>' );
 415                         } else {
 416                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 417                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 418                                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 419                         }
 420                 }
 421                 $out->addHtml( "</div>" );
 422
 423                 if ( $prevnext ) {
 424                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 425                 }
 426         }
 427
 428         /**
 429          * @param Title $title
 430          * @param int $num The number of search results found
 431          * @param null|SearchResultSet $titleMatches Results from title search
 432          * @param null|SearchResultSet $textMatches  Results from text search
 433          */
 434         protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
 435                 // show direct page/create link if applicable
 436
 437                 // Check DBkey !== '' in case of fragment link only.
 438                 if ( is_null( $title ) || $title->getDBkey() === ''
 439                         || ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
 440                         || ( $textMatches !== null && $textMatches->searchContainedSyntax() )
 441                 ) {
 442                         // invalid title
 443                         // preserve the paragraph for margins etc...
 444                         $this->getOutput()->addHtml( '<p></p>' );
 445
 446                         return;
 447                 }
 448
 449                 if ( $title->isKnown() ) {
 450                         $messageName = 'searchmenu-exists';
 451                 } elseif ( $title->userCan( 'create', $this->getUser() ) ) {
 452                         $messageName = 'searchmenu-new';
 453                 } else {
 454                         $messageName = 'searchmenu-new-nocreate';
 455                 }
 456                 $params = array(
 457                         $messageName,
 458                         wfEscapeWikiText( $title->getPrefixedText() ),
 459                         Message::numParam( $num )
 460                 );
 461                 wfRunHooks( 'SpecialSearchCreateLink', array( $title, &$params ) );
 462
 463                 // Extensions using the hook might still return an empty $messageName
 464                 if ( $messageName ) {
 465                         $this->getOutput()->wrapWikiMsg( "<p class=\"mw-search-createlink\">\n$1</p>", $params );
 466                 } else {
 467                         // preserve the paragraph for margins etc...
 468                         $this->getOutput()->addHtml( '<p></p>' );
 469                 }
 470         }
 471
 472         /**
 473          * @param string $term
 474          */
 475         protected function setupPage( $term ) {
 476                 # Should advanced UI be used?
 477                 $this->searchAdvanced = ( $this->profile === 'advanced' );
 478                 $out = $this->getOutput();
 479                 if ( strval( $term ) !== '' ) {
 480                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 481                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 482                                 ->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
 483                                 ->inContentLanguage()->text()
 484                         );
 485                 }
 486                 // add javascript specific to special:search
 487                 $out->addModules( 'mediawiki.special.search' );
 488         }
 489
 490         /**
 491          * Extract "power search" namespace settings from the request object,
 492          * returning a list of index numbers to search.
 493          *
 494          * @param WebRequest $request
 495          * @return array
 496          */
 497         protected function powerSearch( &$request ) {
 498                 $arr = array();
 499                 foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
 500                         if ( $request->getCheck( 'ns' . $ns ) ) {
 501                                 $arr[] = $ns;
 502                         }
 503                 }
 504
 505                 return $arr;
 506         }
 507
 508         /**
 509          * Reconstruct the 'power search' options for links
 510          *
 511          * @return array
 512          */
 513         protected function powerSearchOptions() {
 514                 $opt = array();
 515                 if ( $this->profile !== 'advanced' ) {
 516                         $opt['profile'] = $this->profile;
 517                 } else {
 518                         foreach ( $this->namespaces as $n ) {
 519                                 $opt['ns' . $n] = 1;
 520                         }
 521                 }
 522
 523                 return $opt + $this->extraParams;
 524         }
 525
 526         /**
 527          * Save namespace preferences when we're supposed to
 528          *
 529          * @return bool Whether we wrote something
 530          */
 531         protected function saveNamespaces() {
 532                 $user = $this->getUser();
 533                 $request = $this->getRequest();
 534
 535                 if ( $user->isLoggedIn() &&
 536                         !is_null( $request->getVal( 'nsRemember' ) ) &&
 537                         $user->matchEditToken( $request->getVal( 'nsToken' ) )
 538                 ) {
 539                         // Reset namespace preferences: namespaces are not searched
 540                         // when they're not mentioned in the URL parameters.
 541                         foreach ( MWNamespace::getValidNamespaces() as $n ) {
 542                                 $user->setOption( 'searchNs' . $n, false );
 543                         }
 544                         // The request parameters include all the namespaces we just searched.
 545                         // Even if they're the same as an existing profile, they're not eaten.
 546                         foreach ( $this->namespaces as $n ) {
 547                                 $user->setOption( 'searchNs' . $n, true );
 548                         }
 549
 550                         $user->saveSettings();
 551                         return true;
 552                 }
 553
 554                 return false;
 555         }
 556
 557         /**
 558          * Show whole set of results
 559          *
 560          * @param SearchResultSet $matches
 561          *
 562          * @return string
 563          */
 564         protected function showMatches( &$matches ) {
 565                 global $wgContLang;
 566
 567                 $profile = new ProfileSection( __METHOD__ );
 568                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 569
 570                 $out = "<ul class='mw-search-results'>\n";
 571                 $result = $matches->next();
 572                 while ( $result ) {
 573                         $out .= $this->showHit( $result, $terms );
 574                         $result = $matches->next();
 575                 }
 576                 $out .= "</ul>\n";
 577
 578                 // convert the whole thing to desired language variant
 579                 $out = $wgContLang->convert( $out );
 580
 581                 return $out;
 582         }
 583
 584         /**
 585          * Format a single hit result
 586          *
 587          * @param SearchResult $result
 588          * @param array $terms Terms to highlight
 589          *
 590          * @return string
 591          */
 592         protected function showHit( $result, $terms ) {
 593                 $profile = new ProfileSection( __METHOD__ );
 594
 595                 if ( $result->isBrokenTitle() ) {
 596                         return '';
 597                 }
 598
 599                 $title = $result->getTitle();
 600
 601                 $titleSnippet = $result->getTitleSnippet( $terms );
 602
 603                 if ( $titleSnippet == '' ) {
 604                         $titleSnippet = null;
 605                 }
 606
 607                 $link_t = clone $title;
 608
 609                 wfRunHooks( 'ShowSearchHitTitle',
 610                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 611
 612                 $link = Linker::linkKnown(
 613                         $link_t,
 614                         $titleSnippet
 615                 );
 616
 617                 //If page content is not readable, just return the title.
 618                 //This is not quite safe, but better than showing excerpts from non-readable pages
 619                 //Note that hiding the entry entirely would screw up paging.
 620                 if ( !$title->userCan( 'read', $this->getUser() ) ) {
 621                         return "<li>{$link}</li>\n";
 622                 }
 623
 624                 // If the page doesn't *exist*... our search index is out of date.
 625                 // The least confusing at this point is to drop the result.
 626                 // You may get less results, but... oh well. :P
 627                 if ( $result->isMissingRevision() ) {
 628                         return '';
 629                 }
 630
 631                 // format redirects / relevant sections
 632                 $redirectTitle = $result->getRedirectTitle();
 633                 $redirectText = $result->getRedirectSnippet( $terms );
 634                 $sectionTitle = $result->getSectionTitle();
 635                 $sectionText = $result->getSectionSnippet( $terms );
 636                 $redirect = '';
 637
 638                 if ( !is_null( $redirectTitle ) ) {
 639                         if ( $redirectText == '' ) {
 640                                 $redirectText = null;
 641                         }
 642
 643                         $redirect = "<span class='searchalttitle'>" .
 644                                 $this->msg( 'search-redirect' )->rawParams(
 645                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 646                                 "</span>";
 647                 }
 648
 649                 $section = '';
 650
 651                 if ( !is_null( $sectionTitle ) ) {
 652                         if ( $sectionText == '' ) {
 653                                 $sectionText = null;
 654                         }
 655
 656                         $section = "<span class='searchalttitle'>" .
 657                                 $this->msg( 'search-section' )->rawParams(
 658                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 659                                 "</span>";
 660                 }
 661
 662                 // format text extract
 663                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 664
 665                 $lang = $this->getLanguage();
 666
 667                 // format score
 668                 if ( is_null( $result->getScore() ) ) {
 669                         // Search engine doesn't report scoring info
 670                         $score = '';
 671                 } else {
 672                         $percent = sprintf( '%2.1f', $result->getScore() * 100 );
 673                         $score = $this->msg( 'search-result-score' )->numParams( $percent )->text()
 674                                 . ' - ';
 675                 }
 676
 677                 // format description
 678                 $byteSize = $result->getByteSize();
 679                 $wordCount = $result->getWordCount();
 680                 $timestamp = $result->getTimestamp();
 681                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 682                         ->numParams( $wordCount )->escaped();
 683
 684                 if ( $title->getNamespace() == NS_CATEGORY ) {
 685                         $cat = Category::newFromTitle( $title );
 686                         $size = $this->msg( 'search-result-category-size' )
 687                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 688                                 ->escaped();
 689                 }
 690
 691                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 692
 693                 // link to related articles if supported
 694                 $related = '';
 695                 if ( $result->hasRelated() ) {
 696                         $stParams = array_merge(
 697                                 $this->powerSearchOptions(),
 698                                 array(
 699                                         'search' => $this->msg( 'searchrelated' )->inContentLanguage()->text() .
 700                                                 ':' . $title->getPrefixedText(),
 701                                         'fulltext' => $this->msg( 'search' )->text()
 702                                 )
 703                         );
 704
 705                         $related = ' -- ' . Linker::linkKnown(
 706                                 $this->getPageTitle(),
 707                                 $this->msg( 'search-relatedarticle' )->text(),
 708                                 array(),
 709                                 $stParams
 710                         );
 711                 }
 712
 713                 $fileMatch = '';
 714                 // Include a thumbnail for media files...
 715                 if ( $title->getNamespace() == NS_FILE ) {
 716                         $img = $result->getFile();
 717                         $img = $img ?: wfFindFile( $title );
 718                         if ( $result->isFileMatch() ) {
 719                                 $fileMatch = "<span class='searchalttitle'>" .
 720                                         $this->msg( 'search-file-match' )->escaped() . "</span>";
 721                         }
 722                         if ( $img ) {
 723                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 724                                 if ( $thumb ) {
 725                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 726                                         // Float doesn't seem to interact well with the bullets.
 727                                         // Table messes up vertical alignment of the bullets.
 728                                         // Bullets are therefore disabled (didn't look great anyway).
 729                                         return "<li>" .
 730                                                 '<table class="searchResultImage">' .
 731                                                 '<tr>' .
 732                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 733                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 734                                                 '</td>' .
 735                                                 '<td style="vertical-align: top;">' .
 736                                                 "{$link} {$fileMatch}" .
 737                                                 $extract .
 738                                                 "<div class='mw-search-result-data'>{$score}{$desc} - {$date}{$related}</div>" .
 739                                                 '</td>' .
 740                                                 '</tr>' .
 741                                                 '</table>' .
 742                                                 "</li>\n";
 743                                 }
 744                         }
 745                 }
 746
 747                 $html = null;
 748
 749                 if ( wfRunHooks( 'ShowSearchHit', array(
 750                         $this, $result, $terms,
 751                         &$link, &$redirect, &$section, &$extract,
 752                         &$score, &$size, &$date, &$related,
 753                         &$html
 754                 ) ) ) {
 755                         $html = "<li><div class='mw-search-result-heading'>" .
 756                                 "{$link} {$redirect} {$section} {$fileMatch}</div> {$extract}\n" .
 757                                 "<div class='mw-search-result-data'>{$score}{$size} - {$date}{$related}</div>" .
 758                                 "</li>\n";
 759                 }
 760
 761                 return $html;
 762         }
 763
 764         /**
 765          * Show results from other wikis
 766          *
 767          * @param SearchResultSet|array $matches
 768          * @param string $query
 769          *
 770          * @return string
 771          */
 772         protected function showInterwiki( $matches, $query ) {
 773                 global $wgContLang;
 774                 $profile = new ProfileSection( __METHOD__ );
 775
 776                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 777                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 778                 $out .= "<ul class='mw-search-iwresults'>\n";
 779
 780                 // work out custom project captions
 781                 $customCaptions = array();
 782                 // format per line <iwprefix>:<caption>
 783                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() );
 784                 foreach ( $customLines as $line ) {
 785                         $parts = explode( ":", $line, 2 );
 786                         if ( count( $parts ) == 2 ) { // validate line
 787                                 $customCaptions[$parts[0]] = $parts[1];
 788                         }
 789                 }
 790
 791                 if ( !is_array( $matches ) ) {
 792                         $matches = array( $matches );
 793                 }
 794
 795                 foreach ( $matches as $set ) {
 796                         $prev = null;
 797                         $result = $set->next();
 798                         while ( $result ) {
 799                                 $out .= $this->showInterwikiHit( $result, $prev, $query, $customCaptions );
 800                                 $prev = $result->getInterwikiPrefix();
 801                                 $result = $set->next();
 802                         }
 803                 }
 804
 805                 // @todo Should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 806                 $out .= "</ul></div>\n";
 807
 808                 // convert the whole thing to desired language variant
 809                 $out = $wgContLang->convert( $out );
 810
 811                 return $out;
 812         }
 813
 814         /**
 815          * Show single interwiki link
 816          *
 817          * @param SearchResult $result
 818          * @param string $lastInterwiki
 819          * @param string $query
 820          * @param array $customCaptions iw prefix -> caption
 821          *
 822          * @return string
 823          */
 824         protected function showInterwikiHit( $result, $lastInterwiki, $query, $customCaptions ) {
 825                 $profile = new ProfileSection( __METHOD__ );
 826
 827                 if ( $result->isBrokenTitle() ) {
 828                         return '';
 829                 }
 830
 831                 $title = $result->getTitle();
 832
 833                 $titleSnippet = $result->getTitleSnippet();
 834
 835                 if ( $titleSnippet == '' ) {
 836                         $titleSnippet = null;
 837                 }
 838
 839                 $link = Linker::linkKnown(
 840                         $title,
 841                         $titleSnippet
 842                 );
 843
 844                 // format redirect if any
 845                 $redirectTitle = $result->getRedirectTitle();
 846                 $redirectText = $result->getRedirectSnippet();
 847                 $redirect = '';
 848                 if ( !is_null( $redirectTitle ) ) {
 849                         if ( $redirectText == '' ) {
 850                                 $redirectText = null;
 851                         }
 852
 853                         $redirect = "<span class='searchalttitle'>" .
 854                                 $this->msg( 'search-redirect' )->rawParams(
 855                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 856                                 "</span>";
 857                 }
 858
 859                 $out = "";
 860                 // display project name
 861                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $title->getInterwiki() ) {
 862                         if ( array_key_exists( $title->getInterwiki(), $customCaptions ) ) {
 863                                 // captions from 'search-interwiki-custom'
 864                                 $caption = $customCaptions[$title->getInterwiki()];
 865                         } else {
 866                                 // default is to show the hostname of the other wiki which might suck
 867                                 // if there are many wikis on one hostname
 868                                 $parsed = wfParseUrl( $title->getFullURL() );
 869                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 870                         }
 871                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 872                         $searchTitle = Title::newFromText( $title->getInterwiki() . ":Special:Search" );
 873                         $searchLink = Linker::linkKnown(
 874                                 $searchTitle,
 875                                 $this->msg( 'search-interwiki-more' )->text(),
 876                                 array(),
 877                                 array(
 878                                         'search' => $query,
 879                                         'fulltext' => 'Search'
 880                                 )
 881                         );
 882                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 883                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 884                 }
 885
 886                 $out .= "<li>{$link} {$redirect}</li>\n";
 887
 888                 return $out;
 889         }
 890
 891         /**
 892          * @param string $profile
 893          * @param string $term
 894          * @return string
 895          */
 896         protected function getProfileForm( $profile, $term ) {
 897                 // Hidden stuff
 898                 $opts = array();
 899                 $opts['profile'] = $this->profile;
 900
 901                 if ( $profile === 'advanced' ) {
 902                         return $this->powerSearchBox( $term, $opts );
 903                 } else {
 904                         $form = '';
 905                         wfRunHooks( 'SpecialSearchProfileForm', array( $this, &$form, $profile, $term, $opts ) );
 906
 907                         return $form;
 908                 }
 909         }
 910
 911         /**
 912          * Generates the power search box at [[Special:Search]]
 913          *
 914          * @param string $term Search term
 915          * @param array $opts
 916          * @return string HTML form
 917          */
 918         protected function powerSearchBox( $term, $opts ) {
 919                 global $wgContLang;
 920
 921                 // Groups namespaces into rows according to subject
 922                 $rows = array();
 923                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 924                         $subject = MWNamespace::getSubject( $namespace );
 925                         if ( !array_key_exists( $subject, $rows ) ) {
 926                                 $rows[$subject] = "";
 927                         }
 928
 929                         $name = $wgContLang->getConverter()->convertNamespace( $namespace );
 930                         if ( $name == '' ) {
 931                                 $name = $this->msg( 'blanknamespace' )->text();
 932                         }
 933
 934                         $rows[$subject] .=
 935                                 Xml::openElement(
 936                                         'td', array( 'style' => 'white-space: nowrap' )
 937                                 ) .
 938                                 Xml::checkLabel(
 939                                         $name,
 940                                         "ns{$namespace}",
 941                                         "mw-search-ns{$namespace}",
 942                                         in_array( $namespace, $this->namespaces )
 943                                 ) .
 944                                 Xml::closeElement( 'td' );
 945                 }
 946
 947                 $rows = array_values( $rows );
 948                 $numRows = count( $rows );
 949
 950                 // Lays out namespaces in multiple floating two-column tables so they'll
 951                 // be arranged nicely while still accommodating different screen widths
 952                 $namespaceTables = '';
 953                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 954                         $namespaceTables .= Xml::openElement(
 955                                 'table',
 956                                 array( 'cellpadding' => 0, 'cellspacing' => 0 )
 957                         );
 958
 959                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 960                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 961                         }
 962
 963                         $namespaceTables .= Xml::closeElement( 'table' );
 964                 }
 965
 966                 $showSections = array( 'namespaceTables' => $namespaceTables );
 967
 968                 wfRunHooks( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 969
 970                 $hidden = '';
 971                 foreach ( $opts as $key => $value ) {
 972                         $hidden .= Html::hidden( $key, $value );
 973                 }
 974
 975                 # Stuff to feed saveNamespaces()
 976                 $remember = '';
 977                 $user = $this->getUser();
 978                 if ( $user->isLoggedIn() ) {
 979                         $remember .= Html::hidden( 'nsToken', $user->getEditToken() ) .
 980                         Xml::checkLabel(
 981                                 wfMessage( 'powersearch-remember' )->text(),
 982                                 'nsRemember',
 983                                 'mw-search-powersearch-remember',
 984                                 false
 985                         );
 986                 }
 987
 988                 // Return final output
 989                 return Xml::openElement(
 990                         'fieldset',
 991                         array( 'id' => 'mw-searchoptions', 'style' => 'margin:0em;' )
 992                 ) .
 993                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
 994                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
 995                         Html::element( 'div', array( 'id' => 'mw-search-togglebox' ) ) .
 996                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
 997                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
 998                         $hidden .
 999                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1000                         $remember .
1001                         Xml::closeElement( 'fieldset' );
1002         }
1003
1004         /**
1005          * @return array
1006          */
1007         protected function getSearchProfiles() {
1008                 // Builds list of Search Types (profiles)
1009                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
1010
1011                 $profiles = array(
1012                         'default' => array(
1013                                 'message' => 'searchprofile-articles',
1014                                 'tooltip' => 'searchprofile-articles-tooltip',
1015                                 'namespaces' => SearchEngine::defaultNamespaces(),
1016                                 'namespace-messages' => SearchEngine::namespacesAsText(
1017                                         SearchEngine::defaultNamespaces()
1018                                 ),
1019                         ),
1020                         'images' => array(
1021                                 'message' => 'searchprofile-images',
1022                                 'tooltip' => 'searchprofile-images-tooltip',
1023                                 'namespaces' => array( NS_FILE ),
1024                         ),
1025                         'all' => array(
1026                                 'message' => 'searchprofile-everything',
1027                                 'tooltip' => 'searchprofile-everything-tooltip',
1028                                 'namespaces' => $nsAllSet,
1029                         ),
1030                         'advanced' => array(
1031                                 'message' => 'searchprofile-advanced',
1032                                 'tooltip' => 'searchprofile-advanced-tooltip',
1033                                 'namespaces' => self::NAMESPACES_CURRENT,
1034                         )
1035                 );
1036
1037                 wfRunHooks( 'SpecialSearchProfiles', array( &$profiles ) );
1038
1039                 foreach ( $profiles as &$data ) {
1040                         if ( !is_array( $data['namespaces'] ) ) {
1041                                 continue;
1042                         }
1043                         sort( $data['namespaces'] );
1044                 }
1045
1046                 return $profiles;
1047         }
1048
1049         /**
1050          * @param string $term
1051          * @param int $resultsShown
1052          * @param int $totalNum
1053          * @return string
1054          */
1055         protected function formHeader( $term, $resultsShown, $totalNum ) {
1056                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-formheader' ) );
1057
1058                 $bareterm = $term;
1059                 if ( $this->startsWithImage( $term ) ) {
1060                         // Deletes prefixes
1061                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1062                 }
1063
1064                 $profiles = $this->getSearchProfiles();
1065                 $lang = $this->getLanguage();
1066
1067                 // Outputs XML for Search Types
1068                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1069                 $out .= Xml::openElement( 'ul' );
1070                 foreach ( $profiles as $id => $profile ) {
1071                         if ( !isset( $profile['parameters'] ) ) {
1072                                 $profile['parameters'] = array();
1073                         }
1074                         $profile['parameters']['profile'] = $id;
1075
1076                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1077                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1078                         $out .= Xml::tags(
1079                                 'li',
1080                                 array(
1081                                         'class' => $this->profile === $id ? 'current' : 'normal'
1082                                 ),
1083                                 $this->makeSearchLink(
1084                                         $bareterm,
1085                                         array(),
1086                                         $this->msg( $profile['message'] )->text(),
1087                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1088                                         $profile['parameters']
1089                                 )
1090                         );
1091                 }
1092                 $out .= Xml::closeElement( 'ul' );
1093                 $out .= Xml::closeElement( 'div' );
1094
1095                 // Results-info
1096                 if ( $resultsShown > 0 ) {
1097                         if ( $totalNum > 0 ) {
1098                                 $top = $this->msg( 'showingresultsheader' )
1099                                         ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1100                                         ->params( wfEscapeWikiText( $term ) )
1101                                         ->numParams( $resultsShown )
1102                                         ->parse();
1103                         } elseif ( $resultsShown >= $this->limit ) {
1104                                 $top = $this->msg( 'showingresults' )
1105                                         ->numParams( $this->limit, $this->offset + 1 )
1106                                         ->parse();
1107                         } else {
1108                                 $top = $this->msg( 'showingresultsnum' )
1109                                         ->numParams( $this->limit, $this->offset + 1, $resultsShown )
1110                                         ->parse();
1111                         }
1112                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ),
1113                                 Xml::tags( 'ul', null, Xml::tags( 'li', null, $top ) )
1114                         );
1115                 }
1116
1117                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1118                 $out .= Xml::closeElement( 'div' );
1119
1120                 return $out;
1121         }
1122
1123         /**
1124          * @param string $term
1125          * @return string
1126          */
1127         protected function shortDialog( $term ) {
1128                 $out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
1129                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1130                 // Term box
1131                 $out .= Html::input( 'search', $term, 'search', array(
1132                         'id' => $this->profile === 'advanced' ? 'powerSearchText' : 'searchText',
1133                         'size' => '50',
1134                         'autofocus',
1135                         'class' => 'mw-ui-input',
1136                 ) ) . "\n";
1137                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1138                 $out .= Xml::submitButton(
1139                         $this->msg( 'searchbutton' )->text(),
1140                         array( 'class' => array( 'mw-ui-button', 'mw-ui-progressive' ) )
1141                 ) . "\n";
1142
1143                 return $out . $this->didYouMeanHtml;
1144         }
1145
1146         /**
1147          * Make a search link with some target namespaces
1148          *
1149          * @param string $term
1150          * @param array $namespaces Ignored
1151          * @param string $label Link's text
1152          * @param string $tooltip Link's tooltip
1153          * @param array $params Query string parameters
1154          * @return string HTML fragment
1155          */
1156         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1157                 $opt = $params;
1158                 foreach ( $namespaces as $n ) {
1159                         $opt['ns' . $n] = 1;
1160                 }
1161
1162                 $stParams = array_merge(
1163                         array(
1164                                 'search' => $term,
1165                                 'fulltext' => $this->msg( 'search' )->text()
1166                         ),
1167                         $opt
1168                 );
1169
1170                 return Xml::element(
1171                         'a',
1172                         array(
1173                                 'href' => $this->getPageTitle()->getLocalURL( $stParams ),
1174                                 'title' => $tooltip
1175                         ),
1176                         $label
1177                 );
1178         }
1179
1180         /**
1181          * Check if query starts with image: prefix
1182          *
1183          * @param string $term The string to check
1184          * @return bool
1185          */
1186         protected function startsWithImage( $term ) {
1187                 global $wgContLang;
1188
1189                 $parts = explode( ':', $term );
1190                 if ( count( $parts ) > 1 ) {
1191                         return $wgContLang->getNsIndex( $parts[0] ) == NS_FILE;
1192                 }
1193
1194                 return false;
1195         }
1196
1197         /**
1198          * Check if query starts with all: prefix
1199          *
1200          * @param string $term The string to check
1201          * @return bool
1202          */
1203         protected function startsWithAll( $term ) {
1204
1205                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1206
1207                 $parts = explode( ':', $term );
1208                 if ( count( $parts ) > 1 ) {
1209                         return $parts[0] == $allkeyword;
1210                 }
1211
1212                 return false;
1213         }
1214
1215         /**
1216          * @since 1.18
1217          *
1218          * @return SearchEngine
1219          */
1220         public function getSearchEngine() {
1221                 if ( $this->searchEngine === null ) {
1222                         $this->searchEngine = $this->searchEngineType ?
1223                                 SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
1224                 }
1225
1226                 return $this->searchEngine;
1227         }
1228
1229         /**
1230          * Current search profile.
1231          * @return null|string
1232          */
1233         function getProfile() {
1234                 return $this->profile;
1235         }
1236
1237         /**
1238          * Current namespaces.
1239          * @return array
1240          */
1241         function getNamespaces() {
1242                 return $this->namespaces;
1243         }
1244
1245         /**
1246          * Users of hook SpecialSearchSetupEngine can use this to
1247          * add more params to links to not lose selection when
1248          * user navigates search results.
1249          * @since 1.18
1250          *
1251          * @param string $key
1252          * @param mixed $value
1253          */
1254         public function setExtraParam( $key, $value ) {
1255                 $this->extraParams[$key] = $value;
1256         }
1257
1258         protected function getGroupName() {
1259                 return 'pages';
1260         }
1261 }