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, help, 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          * null|string
  38          */
  39         protected $profile;
  40
  41         /// Search engine
  42         protected $searchEngine;
  43
  44         /// Search engine type, if not default
  45         protected $searchEngineType;
  46
  47         /// For links
  48         protected $extraParams = array();
  49
  50         /// 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 bool
  65          */
  66         protected $searchRedirects;
  67
  68         /**
  69          * @var string
  70          */
  71         protected $didYouMeanHtml, $fulltext;
  72
  73         const NAMESPACES_CURRENT = 'sense';
  74
  75         public function __construct() {
  76                 parent::__construct( 'Search' );
  77         }
  78
  79         /**
  80          * Entry point
  81          *
  82          * @param string $par or null
  83          */
  84         public function execute( $par ) {
  85                 $this->setHeaders();
  86                 $this->outputHeader();
  87                 $out = $this->getOutput();
  88                 $out->allowClickjacking();
  89                 $out->addModuleStyles( array(
  90                         'mediawiki.special', 'mediawiki.special.search', 'mediawiki.ui', 'mediawiki.ui.button'
  91                 ) );
  92
  93                 // Strip underscores from title parameter; most of the time we'll want
  94                 // text form here. But don't strip underscores from actual text params!
  95                 $titleParam = str_replace( '_', ' ', $par );
  96
  97                 $request = $this->getRequest();
  98
  99                 // Fetch the search term
 100                 $search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );
 101
 102                 $this->load();
 103
 104                 $this->searchEngineType = $request->getVal( 'srbackend' );
 105
 106                 if ( $request->getVal( 'fulltext' )
 107                         || !is_null( $request->getVal( 'offset' ) )
 108                         || !is_null( $request->getVal( 'searchx' ) )
 109                 ) {
 110                         $this->showResults( $search );
 111                 } else {
 112                         $this->goResult( $search );
 113                 }
 114         }
 115
 116         /**
 117          * Set up basic search parameters from the request and user settings.
 118          *
 119          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 120          */
 121         public function load() {
 122                 $request = $this->getRequest();
 123                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '', 500 );
 124                 $this->mPrefix = $request->getVal( 'prefix', '' );
 125
 126                 $user = $this->getUser();
 127
 128                 # Extract manually requested namespaces
 129                 $nslist = $this->powerSearch( $request );
 130                 if ( !count( $nslist ) ) {
 131                         # Fallback to user preference
 132                         $nslist = SearchEngine::userNamespaces( $user );
 133                 }
 134
 135                 $profile = null;
 136                 if ( !count( $nslist ) ) {
 137                         $profile = 'default';
 138                 }
 139
 140                 $profile = $request->getVal( 'profile', $profile );
 141                 $profiles = $this->getSearchProfiles();
 142                 if ( $profile === null ) {
 143                         // BC with old request format
 144                         $profile = 'advanced';
 145                         foreach ( $profiles as $key => $data ) {
 146                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 147                                         $profile = $key;
 148                                 }
 149                         }
 150                         $this->namespaces = $nslist;
 151                 } elseif ( $profile === 'advanced' ) {
 152                         $this->namespaces = $nslist;
 153                 } else {
 154                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 155                                 $this->namespaces = $profiles[$profile]['namespaces'];
 156                         } else {
 157                                 // Unknown profile requested
 158                                 $profile = 'default';
 159                                 $this->namespaces = $profiles['default']['namespaces'];
 160                         }
 161                 }
 162
 163                 // Redirects defaults to true, but we don't know whether it was ticked of or just missing
 164                 $default = $request->getBool( 'profile' ) ? 0 : 1;
 165                 $this->searchRedirects = $request->getBool( 'redirs', $default ) ? 1 : 0;
 166                 $this->didYouMeanHtml = ''; # html of did you mean... link
 167                 $this->fulltext = $request->getVal( 'fulltext' );
 168                 $this->profile = $profile;
 169         }
 170
 171         /**
 172          * If an exact title match can be found, jump straight ahead to it.
 173          *
 174          * @param $term String
 175          */
 176         public function goResult( $term ) {
 177                 $this->setupPage( $term );
 178                 # Try to go to page as entered.
 179                 $t = Title::newFromText( $term );
 180                 # If the string cannot be used to create a title
 181                 if ( is_null( $t ) ) {
 182                         $this->showResults( $term );
 183                         return;
 184                 }
 185                 # If there's an exact or very near match, jump right there.
 186                 $t = SearchEngine::getNearMatch( $term );
 187
 188                 if ( !wfRunHooks( 'SpecialSearchGo', array( &$t, &$term ) ) ) {
 189                         # Hook requested termination
 190                         return;
 191                 }
 192
 193                 if ( !is_null( $t ) ) {
 194                         $this->getOutput()->redirect( $t->getFullURL() );
 195                         return;
 196                 }
 197                 # No match, generate an edit URL
 198                 $t = Title::newFromText( $term );
 199                 if ( !is_null( $t ) ) {
 200                         global $wgGoToEdit;
 201                         wfRunHooks( 'SpecialSearchNogomatch', array( &$t ) );
 202                         wfDebugLog( 'nogomatch', $t->getText(), false );
 203
 204                         # If the feature is enabled, go straight to the edit page
 205                         if ( $wgGoToEdit ) {
 206                                 $this->getOutput()->redirect( $t->getFullURL( array( 'action' => 'edit' ) ) );
 207                                 return;
 208                         }
 209                 }
 210                 $this->showResults( $term );
 211         }
 212
 213         /**
 214          * @param $term String
 215          */
 216         public function showResults( $term ) {
 217                 global $wgDisableTextSearch, $wgSearchForwardUrl, $wgContLang, $wgScript;
 218                 wfProfileIn( __METHOD__ );
 219
 220                 $search = $this->getSearchEngine();
 221                 $search->setLimitOffset( $this->limit, $this->offset );
 222                 $search->setNamespaces( $this->namespaces );
 223                 $search->showRedirects = $this->searchRedirects; // BC
 224                 $search->setFeatureData( 'list-redirects', $this->searchRedirects );
 225                 $search->prefix = $this->mPrefix;
 226                 $term = $search->transformSearchTerm( $term );
 227
 228                 wfRunHooks( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 229
 230                 $this->setupPage( $term );
 231
 232                 $out = $this->getOutput();
 233
 234                 if ( $wgDisableTextSearch ) {
 235                         if ( $wgSearchForwardUrl ) {
 236                                 $url = str_replace( '$1', urlencode( $term ), $wgSearchForwardUrl );
 237                                 $out->redirect( $url );
 238                         } else {
 239                                 $out->addHTML(
 240                                         Xml::openElement( 'fieldset' ) .
 241                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 242                                         Xml::element( 'p', array( 'class' => 'mw-searchdisabled' ), $this->msg( 'searchdisabled' )->text() ) .
 243                                         $this->msg( 'googlesearch' )->rawParams(
 244                                                 htmlspecialchars( $term ),
 245                                                 'UTF-8',
 246                                                 $this->msg( 'searchbutton' )->escaped()
 247                                         )->text() .
 248                                         Xml::closeElement( 'fieldset' )
 249                                 );
 250                         }
 251                         wfProfileOut( __METHOD__ );
 252                         return;
 253                 }
 254
 255                 $t = Title::newFromText( $term );
 256                 $showSuggestion = $t === null || !$t->isKnown();
 257                 $search->setShowSuggestion( $showSuggestion );
 258
 259                 // fetch search results
 260                 $rewritten = $search->replacePrefixes( $term );
 261
 262                 $titleMatches = $search->searchTitle( $rewritten );
 263                 if ( !( $titleMatches instanceof SearchResultTooMany ) ) {
 264                         $textMatches = $search->searchText( $rewritten );
 265                 }
 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                         $st = SpecialPage::getTitleFor( 'Search' );
 276
 277                         # mirror Go/Search behavior of original request ..
 278                         $didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );
 279
 280                         if ( $this->fulltext != null ) {
 281                                 $didYouMeanParams['fulltext'] = $this->fulltext;
 282                         }
 283
 284                         $stParams = array_merge(
 285                                 $didYouMeanParams,
 286                                 $this->powerSearchOptions()
 287                         );
 288
 289                         $suggestionSnippet = $textMatches->getSuggestionSnippet();
 290
 291                         if ( $suggestionSnippet == '' ) {
 292                                 $suggestionSnippet = null;
 293                         }
 294
 295                         $suggestLink = Linker::linkKnown(
 296                                 $st,
 297                                 $suggestionSnippet,
 298                                 array(),
 299                                 $stParams
 300                         );
 301
 302                         $this->didYouMeanHtml = '<div class="searchdidyoumean">' . $this->msg( 'search-suggest' )->rawParams( $suggestLink )->text() . '</div>';
 303                 }
 304
 305                 if ( !wfRunHooks( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 306                         # Hook requested termination
 307                         wfProfileOut( __METHOD__ );
 308                         return;
 309                 }
 310
 311                 // start rendering the page
 312                 $out->addHtml(
 313                         Xml::openElement(
 314                                 'form',
 315                                 array(
 316                                         'id' => ( $this->profile === 'advanced' ? 'powersearch' : 'search' ),
 317                                         'method' => 'get',
 318                                         'action' => $wgScript
 319                                 )
 320                         )
 321                 );
 322                 $out->addHtml(
 323                         # This is an awful awful ID name. It's not a table, but we
 324                         # named it poorly from when this was a table so now we're
 325                         # stuck with it
 326                         Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
 327                         $this->shortDialog( $term ) .
 328                         Xml::closeElement( 'div' )
 329                 );
 330
 331                 // Sometimes the search engine knows there are too many hits
 332                 if ( $titleMatches instanceof SearchResultTooMany ) {
 333                         $out->wrapWikiMsg( "==$1==\n", 'toomanymatches' );
 334                         wfProfileOut( __METHOD__ );
 335                         return;
 336                 }
 337
 338                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 339                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 340                         $out->addHTML( $this->formHeader( $term, 0, 0 ) );
 341                         $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 342                         $out->addHTML( '</form>' );
 343                         // Empty query -- straight view of search form
 344                         wfProfileOut( __METHOD__ );
 345                         return;
 346                 }
 347
 348                 // Get number of results
 349                 $titleMatchesNum = $titleMatches ? $titleMatches->numRows() : 0;
 350                 $textMatchesNum = $textMatches ? $textMatches->numRows() : 0;
 351                 // Total initial query matches (possible false positives)
 352                 $num = $titleMatchesNum + $textMatchesNum;
 353
 354                 // Get total actual results (after second filtering, if any)
 355                 $numTitleMatches = $titleMatches && !is_null( $titleMatches->getTotalHits() ) ?
 356                         $titleMatches->getTotalHits() : $titleMatchesNum;
 357                 $numTextMatches = $textMatches && !is_null( $textMatches->getTotalHits() ) ?
 358                         $textMatches->getTotalHits() : $textMatchesNum;
 359
 360                 // get total number of results if backend can calculate it
 361                 $totalRes = 0;
 362                 if ( $titleMatches && !is_null( $titleMatches->getTotalHits() ) ) {
 363                         $totalRes += $titleMatches->getTotalHits();
 364                 }
 365                 if ( $textMatches && !is_null( $textMatches->getTotalHits() ) ) {
 366                         $totalRes += $textMatches->getTotalHits();
 367                 }
 368
 369                 // show number of results and current offset
 370                 $out->addHTML( $this->formHeader( $term, $num, $totalRes ) );
 371                 $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 372
 373                 $out->addHtml( Xml::closeElement( 'form' ) );
 374                 $out->addHtml( "<div class='searchresults'>" );
 375
 376                 // prev/next links
 377                 if ( $num || $this->offset ) {
 378                         // Show the create link ahead
 379                         $this->showCreateLink( $t, $num );
 380                         $prevnext = $this->getLanguage()->viewPrevNext( $this->getPageTitle(), $this->offset, $this->limit,
 381                                 $this->powerSearchOptions() + array( 'search' => $term ),
 382                                 max( $titleMatchesNum, $textMatchesNum ) < $this->limit
 383                         );
 384                         //$out->addHTML( "<p class='mw-search-pager-top'>{$prevnext}</p>\n" );
 385                         wfRunHooks( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 386                 } else {
 387                         wfRunHooks( 'SpecialSearchNoResults', array( $term ) );
 388                 }
 389
 390                 $out->parserOptions()->setEditSection( false );
 391                 if ( $titleMatches ) {
 392                         if ( $numTitleMatches > 0 ) {
 393                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 394                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 395                         }
 396                         $titleMatches->free();
 397                 }
 398                 if ( $textMatches && !$textStatus ) {
 399                         // output appropriate heading
 400                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 401                                 // if no title matches the heading is redundant
 402                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 403                         } elseif ( $totalRes == 0 ) {
 404                                 # Don't show the 'no text matches' if we received title matches
 405                                 # $out->wrapWikiMsg( "==$1==\n", 'notextmatches' );
 406                         }
 407                         // show interwiki results if any
 408                         if ( $textMatches->hasInterwikiResults() ) {
 409                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 410                         }
 411                         // show results
 412                         if ( $numTextMatches > 0 ) {
 413                                 $out->addHTML( $this->showMatches( $textMatches ) );
 414                         }
 415
 416                         $textMatches->free();
 417                 }
 418                 if ( $num === 0 ) {
 419                         if ( $textStatus ) {
 420                                 $out->addHTML( '<div class="error">' .
 421                                         htmlspecialchars( $textStatus->getWikiText( 'search-error' ) ) . '</div>' );
 422                         } else {
 423                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 424                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 425                                 $this->showCreateLink( $t, $num );
 426                         }
 427                 }
 428                 $out->addHtml( "</div>" );
 429
 430                 if ( $num || $this->offset ) {
 431                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 432                 }
 433                 wfRunHooks( 'SpecialSearchResultsAppend', array( $this, $out, $term ) );
 434                 wfProfileOut( __METHOD__ );
 435         }
 436
 437         /**
 438          * @param $t Title
 439          * @param int $num The number of search results found
 440          */
 441         protected function showCreateLink( $t, $num ) {
 442                 // show direct page/create link if applicable
 443
 444                 // Check DBkey !== '' in case of fragment link only.
 445                 if ( is_null( $t ) || $t->getDBkey() === '' ) {
 446                         // invalid title
 447                         // preserve the paragraph for margins etc...
 448                         $this->getOutput()->addHtml( '<p></p>' );
 449                         return;
 450                 }
 451
 452                 if ( $t->isKnown() ) {
 453                         $messageName = 'searchmenu-exists';
 454                 } elseif ( $t->userCan( 'create', $this->getUser() ) ) {
 455                         $messageName = 'searchmenu-new';
 456                 } else {
 457                         $messageName = 'searchmenu-new-nocreate';
 458                 }
 459                 $params = array( $messageName, wfEscapeWikiText( $t->getPrefixedText() ), Message::numParam( $num ) );
 460                 wfRunHooks( 'SpecialSearchCreateLink', array( $t, &$params ) );
 461
 462                 // Extensions using the hook might still return an empty $messageName
 463                 if ( $messageName ) {
 464                         $this->getOutput()->wrapWikiMsg( "<p class=\"mw-search-createlink\">\n$1</p>", $params );
 465                 } else {
 466                         // preserve the paragraph for margins etc...
 467                         $this->getOutput()->addHtml( '<p></p>' );
 468                 }
 469         }
 470
 471         /**
 472          * @param $term string
 473          */
 474         protected function setupPage( $term ) {
 475                 # Should advanced UI be used?
 476                 $this->searchAdvanced = ( $this->profile === 'advanced' );
 477                 $out = $this->getOutput();
 478                 if ( strval( $term ) !== '' ) {
 479                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 480                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 481                                 ->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
 482                                 ->inContentLanguage()->text()
 483                         );
 484                 }
 485                 // add javascript specific to special:search
 486                 $out->addModules( 'mediawiki.special.search' );
 487         }
 488
 489         /**
 490          * Extract "power search" namespace settings from the request object,
 491          * returning a list of index numbers to search.
 492          *
 493          * @param $request WebRequest
 494          * @return Array
 495          */
 496         protected function powerSearch( &$request ) {
 497                 $arr = array();
 498                 foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
 499                         if ( $request->getCheck( 'ns' . $ns ) ) {
 500                                 $arr[] = $ns;
 501                         }
 502                 }
 503
 504                 return $arr;
 505         }
 506
 507         /**
 508          * Reconstruct the 'power search' options for links
 509          *
 510          * @return Array
 511          */
 512         protected function powerSearchOptions() {
 513                 $opt = array();
 514                 $opt['redirs'] = $this->searchRedirects ? 1 : 0;
 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                 return $opt + $this->extraParams;
 523         }
 524
 525         /**
 526          * Show whole set of results
 527          *
 528          * @param $matches SearchResultSet
 529          *
 530          * @return string
 531          */
 532         protected function showMatches( &$matches ) {
 533                 global $wgContLang;
 534                 wfProfileIn( __METHOD__ );
 535
 536                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 537
 538                 $out = "";
 539                 $infoLine = $matches->getInfo();
 540                 if ( !is_null( $infoLine ) ) {
 541                         $out .= "\n<!-- {$infoLine} -->\n";
 542                 }
 543                 $out .= "<ul class='mw-search-results'>\n";
 544                 $result = $matches->next();
 545                 while ( $result ) {
 546                         $out .= $this->showHit( $result, $terms );
 547                         $result = $matches->next();
 548                 }
 549                 $out .= "</ul>\n";
 550
 551                 // convert the whole thing to desired language variant
 552                 $out = $wgContLang->convert( $out );
 553                 wfProfileOut( __METHOD__ );
 554                 return $out;
 555         }
 556
 557         /**
 558          * Format a single hit result
 559          *
 560          * @param $result SearchResult
 561          * @param array $terms terms to highlight
 562          *
 563          * @return string
 564          */
 565         protected function showHit( $result, $terms ) {
 566                 wfProfileIn( __METHOD__ );
 567
 568                 if ( $result->isBrokenTitle() ) {
 569                         wfProfileOut( __METHOD__ );
 570                         return "<!-- Broken link in search result -->\n";
 571                 }
 572
 573                 $t = $result->getTitle();
 574
 575                 $titleSnippet = $result->getTitleSnippet( $terms );
 576
 577                 if ( $titleSnippet == '' ) {
 578                         $titleSnippet = null;
 579                 }
 580
 581                 $link_t = clone $t;
 582
 583                 wfRunHooks( 'ShowSearchHitTitle',
 584                                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 585
 586                 $link = Linker::linkKnown(
 587                         $link_t,
 588                         $titleSnippet
 589                 );
 590
 591                 //If page content is not readable, just return the title.
 592                 //This is not quite safe, but better than showing excerpts from non-readable pages
 593                 //Note that hiding the entry entirely would screw up paging.
 594                 if ( !$t->userCan( 'read', $this->getUser() ) ) {
 595                         wfProfileOut( __METHOD__ );
 596                         return "<li>{$link}</li>\n";
 597                 }
 598
 599                 // If the page doesn't *exist*... our search index is out of date.
 600                 // The least confusing at this point is to drop the result.
 601                 // You may get less results, but... oh well. :P
 602                 if ( $result->isMissingRevision() ) {
 603                         wfProfileOut( __METHOD__ );
 604                         return "<!-- missing page " . htmlspecialchars( $t->getPrefixedText() ) . "-->\n";
 605                 }
 606
 607                 // format redirects / relevant sections
 608                 $redirectTitle = $result->getRedirectTitle();
 609                 $redirectText = $result->getRedirectSnippet( $terms );
 610                 $sectionTitle = $result->getSectionTitle();
 611                 $sectionText = $result->getSectionSnippet( $terms );
 612                 $redirect = '';
 613
 614                 if ( !is_null( $redirectTitle ) ) {
 615                         if ( $redirectText == '' ) {
 616                                 $redirectText = null;
 617                         }
 618
 619                         $redirect = "<span class='searchalttitle'>" .
 620                                 $this->msg( 'search-redirect' )->rawParams(
 621                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 622                                 "</span>";
 623                 }
 624
 625                 $section = '';
 626
 627                 if ( !is_null( $sectionTitle ) ) {
 628                         if ( $sectionText == '' ) {
 629                                 $sectionText = null;
 630                         }
 631
 632                         $section = "<span class='searchalttitle'>" .
 633                                 $this->msg( 'search-section' )->rawParams(
 634                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 635                                 "</span>";
 636                 }
 637
 638                 // format text extract
 639                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 640
 641                 $lang = $this->getLanguage();
 642
 643                 // format score
 644                 if ( is_null( $result->getScore() ) ) {
 645                         // Search engine doesn't report scoring info
 646                         $score = '';
 647                 } else {
 648                         $percent = sprintf( '%2.1f', $result->getScore() * 100 );
 649                         $score = $this->msg( 'search-result-score' )->numParams( $percent )->text()
 650                                 . ' - ';
 651                 }
 652
 653                 // format description
 654                 $byteSize = $result->getByteSize();
 655                 $wordCount = $result->getWordCount();
 656                 $timestamp = $result->getTimestamp();
 657                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 658                         ->numParams( $wordCount )->escaped();
 659
 660                 if ( $t->getNamespace() == NS_CATEGORY ) {
 661                         $cat = Category::newFromTitle( $t );
 662                         $size = $this->msg( 'search-result-category-size' )
 663                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 664                                 ->escaped();
 665                 }
 666
 667                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 668
 669                 // link to related articles if supported
 670                 $related = '';
 671                 if ( $result->hasRelated() ) {
 672                         $st = SpecialPage::getTitleFor( 'Search' );
 673                         $stParams = array_merge(
 674                                 $this->powerSearchOptions(),
 675                                 array(
 676                                         'search' => $this->msg( 'searchrelated' )->inContentLanguage()->text() .
 677                                                 ':' . $t->getPrefixedText(),
 678                                         'fulltext' => $this->msg( 'search' )->text()
 679                                 )
 680                         );
 681
 682                         $related = ' -- ' . Linker::linkKnown(
 683                                 $st,
 684                                 $this->msg( 'search-relatedarticle' )->text(),
 685                                 array(),
 686                                 $stParams
 687                         );
 688                 }
 689
 690                 // Include a thumbnail for media files...
 691                 if ( $t->getNamespace() == NS_FILE ) {
 692                         $img = $result->getFile();
 693                         $img = $img ?: wfFindFile( $t );
 694                         if ( $img ) {
 695                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 696                                 if ( $thumb ) {
 697                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 698                                         wfProfileOut( __METHOD__ );
 699                                         // Float doesn't seem to interact well with the bullets.
 700                                         // Table messes up vertical alignment of the bullets.
 701                                         // Bullets are therefore disabled (didn't look great anyway).
 702                                         return "<li>" .
 703                                                 '<table class="searchResultImage">' .
 704                                                 '<tr>' .
 705                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 706                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 707                                                 '</td>' .
 708                                                 '<td style="vertical-align: top;">' .
 709                                                 $link .
 710                                                 $extract .
 711                                                 "<div class='mw-search-result-data'>{$score}{$desc} - {$date}{$related}</div>" .
 712                                                 '</td>' .
 713                                                 '</tr>' .
 714                                                 '</table>' .
 715                                                 "</li>\n";
 716                                 }
 717                         }
 718                 }
 719
 720                 $html = null;
 721
 722                 if ( wfRunHooks( 'ShowSearchHit', array(
 723                         $this, $result, $terms,
 724                         &$link, &$redirect, &$section, &$extract,
 725                         &$score, &$size, &$date, &$related,
 726                         &$html
 727                 ) ) ) {
 728                         $html = "<li><div class='mw-search-result-heading'>{$link} {$redirect} {$section}</div> {$extract}\n" .
 729                                 "<div class='mw-search-result-data'>{$score}{$size} - {$date}{$related}</div>" .
 730                                 "</li>\n";
 731                 }
 732
 733                 wfProfileOut( __METHOD__ );
 734                 return $html;
 735         }
 736
 737         /**
 738          * Show results from other wikis
 739          *
 740          * @param $matches SearchResultSet
 741          * @param $query String
 742          *
 743          * @return string
 744          */
 745         protected function showInterwiki( $matches, $query ) {
 746                 global $wgContLang;
 747                 wfProfileIn( __METHOD__ );
 748                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 749
 750                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 751                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 752                 $out .= "<ul class='mw-search-iwresults'>\n";
 753
 754                 // work out custom project captions
 755                 $customCaptions = array();
 756                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() ); // format per line <iwprefix>:<caption>
 757                 foreach ( $customLines as $line ) {
 758                         $parts = explode( ":", $line, 2 );
 759                         if ( count( $parts ) == 2 ) { // validate line
 760                                 $customCaptions[$parts[0]] = $parts[1];
 761                         }
 762                 }
 763
 764                 $prev = null;
 765                 $result = $matches->next();
 766                 while ( $result ) {
 767                         $out .= $this->showInterwikiHit( $result, $prev, $terms, $query, $customCaptions );
 768                         $prev = $result->getInterwikiPrefix();
 769                         $result = $matches->next();
 770                 }
 771                 // TODO: should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 772                 $out .= "</ul></div>\n";
 773
 774                 // convert the whole thing to desired language variant
 775                 $out = $wgContLang->convert( $out );
 776                 wfProfileOut( __METHOD__ );
 777                 return $out;
 778         }
 779
 780         /**
 781          * Show single interwiki link
 782          *
 783          * @param $result SearchResult
 784          * @param $lastInterwiki String
 785          * @param $terms Array
 786          * @param $query String
 787          * @param array $customCaptions iw prefix -> caption
 788          *
 789          * @return string
 790          */
 791         protected function showInterwikiHit( $result, $lastInterwiki, $terms, $query, $customCaptions ) {
 792                 wfProfileIn( __METHOD__ );
 793
 794                 if ( $result->isBrokenTitle() ) {
 795                         wfProfileOut( __METHOD__ );
 796                         return "<!-- Broken link in search result -->\n";
 797                 }
 798
 799                 $t = $result->getTitle();
 800
 801                 $titleSnippet = $result->getTitleSnippet( $terms );
 802
 803                 if ( $titleSnippet == '' ) {
 804                         $titleSnippet = null;
 805                 }
 806
 807                 $link = Linker::linkKnown(
 808                         $t,
 809                         $titleSnippet
 810                 );
 811
 812                 // format redirect if any
 813                 $redirectTitle = $result->getRedirectTitle();
 814                 $redirectText = $result->getRedirectSnippet( $terms );
 815                 $redirect = '';
 816                 if ( !is_null( $redirectTitle ) ) {
 817                         if ( $redirectText == '' ) {
 818                                 $redirectText = null;
 819                         }
 820
 821                         $redirect = "<span class='searchalttitle'>" .
 822                                 $this->msg( 'search-redirect' )->rawParams(
 823                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 824                                 "</span>";
 825                 }
 826
 827                 $out = "";
 828                 // display project name
 829                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $t->getInterwiki() ) {
 830                         if ( array_key_exists( $t->getInterwiki(), $customCaptions ) ) {
 831                                 // captions from 'search-interwiki-custom'
 832                                 $caption = $customCaptions[$t->getInterwiki()];
 833                         } else {
 834                                 // default is to show the hostname of the other wiki which might suck
 835                                 // if there are many wikis on one hostname
 836                                 $parsed = wfParseUrl( $t->getFullURL() );
 837                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 838                         }
 839                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 840                         $searchTitle = Title::newFromText( $t->getInterwiki() . ":Special:Search" );
 841                         $searchLink = Linker::linkKnown(
 842                                 $searchTitle,
 843                                 $this->msg( 'search-interwiki-more' )->text(),
 844                                 array(),
 845                                 array(
 846                                         'search' => $query,
 847                                         'fulltext' => 'Search'
 848                                 )
 849                         );
 850                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 851                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 852                 }
 853
 854                 $out .= "<li>{$link} {$redirect}</li>\n";
 855                 wfProfileOut( __METHOD__ );
 856                 return $out;
 857         }
 858
 859         /**
 860          * @param $profile
 861          * @param $term
 862          * @return String
 863          */
 864         protected function getProfileForm( $profile, $term ) {
 865                 // Hidden stuff
 866                 $opts = array();
 867                 $opts['redirs'] = $this->searchRedirects;
 868                 $opts['profile'] = $this->profile;
 869
 870                 if ( $profile === 'advanced' ) {
 871                         return $this->powerSearchBox( $term, $opts );
 872                 } else {
 873                         $form = '';
 874                         wfRunHooks( 'SpecialSearchProfileForm', array( $this, &$form, $profile, $term, $opts ) );
 875                         return $form;
 876                 }
 877         }
 878
 879         /**
 880          * Generates the power search box at [[Special:Search]]
 881          *
 882          * @param string $term search term
 883          * @param $opts array
 884          * @return String: HTML form
 885          */
 886         protected function powerSearchBox( $term, $opts ) {
 887                 global $wgContLang;
 888
 889                 // Groups namespaces into rows according to subject
 890                 $rows = array();
 891                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 892                         $subject = MWNamespace::getSubject( $namespace );
 893                         if ( !array_key_exists( $subject, $rows ) ) {
 894                                 $rows[$subject] = "";
 895                         }
 896
 897                         $name = $wgContLang->getConverter()->convertNamespace( $namespace );
 898                         if ( $name == '' ) {
 899                                 $name = $this->msg( 'blanknamespace' )->text();
 900                         }
 901
 902                         $rows[$subject] .=
 903                                 Xml::openElement(
 904                                         'td', array( 'style' => 'white-space: nowrap' )
 905                                 ) .
 906                                 Xml::checkLabel(
 907                                         $name,
 908                                         "ns{$namespace}",
 909                                         "mw-search-ns{$namespace}",
 910                                         in_array( $namespace, $this->namespaces )
 911                                 ) .
 912                                 Xml::closeElement( 'td' );
 913                 }
 914
 915                 $rows = array_values( $rows );
 916                 $numRows = count( $rows );
 917
 918                 // Lays out namespaces in multiple floating two-column tables so they'll
 919                 // be arranged nicely while still accommodating different screen widths
 920                 $namespaceTables = '';
 921                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 922                         $namespaceTables .= Xml::openElement(
 923                                 'table',
 924                                 array( 'cellpadding' => 0, 'cellspacing' => 0 )
 925                         );
 926
 927                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 928                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 929                         }
 930
 931                         $namespaceTables .= Xml::closeElement( 'table' );
 932                 }
 933
 934                 $showSections = array( 'namespaceTables' => $namespaceTables );
 935
 936                 // Show redirects check only if backend supports it
 937                 if ( $this->getSearchEngine()->supports( 'list-redirects' ) ) {
 938                         $showSections['redirects'] =
 939                                 Xml::checkLabel( $this->msg( 'powersearch-redir' )->text(), 'redirs', 'redirs', $this->searchRedirects );
 940                 }
 941
 942                 wfRunHooks( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 943
 944                 $hidden = '';
 945                 unset( $opts['redirs'] );
 946                 foreach ( $opts as $key => $value ) {
 947                         $hidden .= Html::hidden( $key, $value );
 948                 }
 949                 // Return final output
 950                 return Xml::openElement(
 951                                 'fieldset',
 952                                 array( 'id' => 'mw-searchoptions', 'style' => 'margin:0em;' )
 953                         ) .
 954                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
 955                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
 956                         Html::element( 'div', array( 'id' => 'mw-search-togglebox' ) ) .
 957                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
 958                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
 959                         $hidden .
 960                         Xml::closeElement( 'fieldset' );
 961         }
 962
 963         /**
 964          * @return array
 965          */
 966         protected function getSearchProfiles() {
 967                 // Builds list of Search Types (profiles)
 968                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
 969
 970                 $profiles = array(
 971                         'default' => array(
 972                                 'message' => 'searchprofile-articles',
 973                                 'tooltip' => 'searchprofile-articles-tooltip',
 974                                 'namespaces' => SearchEngine::defaultNamespaces(),
 975                                 'namespace-messages' => SearchEngine::namespacesAsText(
 976                                         SearchEngine::defaultNamespaces()
 977                                 ),
 978                         ),
 979                         'images' => array(
 980                                 'message' => 'searchprofile-images',
 981                                 'tooltip' => 'searchprofile-images-tooltip',
 982                                 'namespaces' => array( NS_FILE ),
 983                         ),
 984                         'help' => array(
 985                                 'message' => 'searchprofile-project',
 986                                 'tooltip' => 'searchprofile-project-tooltip',
 987                                 'namespaces' => SearchEngine::helpNamespaces(),
 988                                 'namespace-messages' => SearchEngine::namespacesAsText(
 989                                         SearchEngine::helpNamespaces()
 990                                 ),
 991                         ),
 992                         'all' => array(
 993                                 'message' => 'searchprofile-everything',
 994                                 'tooltip' => 'searchprofile-everything-tooltip',
 995                                 'namespaces' => $nsAllSet,
 996                         ),
 997                         'advanced' => array(
 998                                 'message' => 'searchprofile-advanced',
 999                                 'tooltip' => 'searchprofile-advanced-tooltip',
1000                                 'namespaces' => self::NAMESPACES_CURRENT,
1001                         )
1002                 );
1003
1004                 wfRunHooks( 'SpecialSearchProfiles', array( &$profiles ) );
1005
1006                 foreach ( $profiles as &$data ) {
1007                         if ( !is_array( $data['namespaces'] ) ) {
1008                                 continue;
1009                         }
1010                         sort( $data['namespaces'] );
1011                 }
1012
1013                 return $profiles;
1014         }
1015
1016         /**
1017          * @param $term
1018          * @param $resultsShown
1019          * @param $totalNum
1020          * @return string
1021          */
1022         protected function formHeader( $term, $resultsShown, $totalNum ) {
1023                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-formheader' ) );
1024
1025                 $bareterm = $term;
1026                 if ( $this->startsWithImage( $term ) ) {
1027                         // Deletes prefixes
1028                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1029                 }
1030
1031                 $profiles = $this->getSearchProfiles();
1032                 $lang = $this->getLanguage();
1033
1034                 // Outputs XML for Search Types
1035                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1036                 $out .= Xml::openElement( 'ul' );
1037                 foreach ( $profiles as $id => $profile ) {
1038                         if ( !isset( $profile['parameters'] ) ) {
1039                                 $profile['parameters'] = array();
1040                         }
1041                         $profile['parameters']['profile'] = $id;
1042
1043                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1044                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1045                         $out .= Xml::tags(
1046                                 'li',
1047                                 array(
1048                                         'class' => $this->profile === $id ? 'current' : 'normal'
1049                                 ),
1050                                 $this->makeSearchLink(
1051                                         $bareterm,
1052                                         array(),
1053                                         $this->msg( $profile['message'] )->text(),
1054                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1055                                         $profile['parameters']
1056                                 )
1057                         );
1058                 }
1059                 $out .= Xml::closeElement( 'ul' );
1060                 $out .= Xml::closeElement( 'div' );
1061
1062                 // Results-info
1063                 if ( $resultsShown > 0 ) {
1064                         if ( $totalNum > 0 ) {
1065                                 $top = $this->msg( 'showingresultsheader' )
1066                                         ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1067                                         ->params( wfEscapeWikiText( $term ) )
1068                                         ->numParams( $resultsShown )
1069                                         ->parse();
1070                         } elseif ( $resultsShown >= $this->limit ) {
1071                                 $top = $this->msg( 'showingresults' )
1072                                         ->numParams( $this->limit, $this->offset + 1 )
1073                                         ->parse();
1074                         } else {
1075                                 $top = $this->msg( 'showingresultsnum' )
1076                                         ->numParams( $this->limit, $this->offset + 1, $resultsShown )
1077                                         ->parse();
1078                         }
1079                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ),
1080                                 Xml::tags( 'ul', null, Xml::tags( 'li', null, $top ) )
1081                         );
1082                 }
1083
1084                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1085                 $out .= Xml::closeElement( 'div' );
1086
1087                 return $out;
1088         }
1089
1090         /**
1091          * @param $term string
1092          * @return string
1093          */
1094         protected function shortDialog( $term ) {
1095                 $out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
1096                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1097                 // Term box
1098                 $out .= Html::input( 'search', $term, 'search', array(
1099                         'id' => $this->profile === 'advanced' ? 'powerSearchText' : 'searchText',
1100                         'size' => '50',
1101                         'autofocus',
1102                         'class' => 'mw-ui-input',
1103                 ) ) . "\n";
1104                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1105                 $out .= Xml::submitButton(
1106                         $this->msg( 'searchbutton' )->text(),
1107                         array( 'class' => array( 'mw-ui-button', 'mw-ui-primary' ) )
1108                 ) . "\n";
1109                 return $out . $this->didYouMeanHtml;
1110         }
1111
1112         /**
1113          * Make a search link with some target namespaces
1114          *
1115          * @param $term String
1116          * @param array $namespaces ignored
1117          * @param string $label link's text
1118          * @param string $tooltip link's tooltip
1119          * @param array $params query string parameters
1120          * @return String: HTML fragment
1121          */
1122         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1123                 $opt = $params;
1124                 foreach ( $namespaces as $n ) {
1125                         $opt['ns' . $n] = 1;
1126                 }
1127                 $opt['redirs'] = $this->searchRedirects;
1128
1129                 $stParams = array_merge(
1130                         array(
1131                                 'search' => $term,
1132                                 'fulltext' => $this->msg( 'search' )->text()
1133                         ),
1134                         $opt
1135                 );
1136
1137                 return Xml::element(
1138                         'a',
1139                         array(
1140                                 'href' => $this->getPageTitle()->getLocalURL( $stParams ),
1141                                 'title' => $tooltip
1142                         ),
1143                         $label
1144                 );
1145         }
1146
1147         /**
1148          * Check if query starts with image: prefix
1149          *
1150          * @param string $term the string to check
1151          * @return Boolean
1152          */
1153         protected function startsWithImage( $term ) {
1154                 global $wgContLang;
1155
1156                 $p = explode( ':', $term );
1157                 if ( count( $p ) > 1 ) {
1158                         return $wgContLang->getNsIndex( $p[0] ) == NS_FILE;
1159                 }
1160                 return false;
1161         }
1162
1163         /**
1164          * Check if query starts with all: prefix
1165          *
1166          * @param string $term the string to check
1167          * @return Boolean
1168          */
1169         protected function startsWithAll( $term ) {
1170
1171                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1172
1173                 $p = explode( ':', $term );
1174                 if ( count( $p ) > 1 ) {
1175                         return $p[0] == $allkeyword;
1176                 }
1177                 return false;
1178         }
1179
1180         /**
1181          * @since 1.18
1182          *
1183          * @return SearchEngine
1184          */
1185         public function getSearchEngine() {
1186                 if ( $this->searchEngine === null ) {
1187                         $this->searchEngine = $this->searchEngineType ?
1188                                 SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
1189                 }
1190                 return $this->searchEngine;
1191         }
1192
1193         /**
1194          * Current search profile.
1195          * @return null|string
1196          */
1197         function getProfile() {
1198                 return $this->profile;
1199         }
1200
1201         /**
1202          * Current namespaces.
1203          * @return array
1204          */
1205         function getNamespaces() {
1206                 return $this->namespaces;
1207         }
1208
1209         /**
1210          * Users of hook SpecialSearchSetupEngine can use this to
1211          * add more params to links to not lose selection when
1212          * user navigates search results.
1213          * @since 1.18
1214          *
1215          * @param $key
1216          * @param $value
1217          */
1218         public function setExtraParam( $key, $value ) {
1219                 $this->extraParams[$key] = $value;
1220         }
1221
1222         protected function getGroupName() {
1223                 return 'pages';
1224         }
1225 }