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         function getProfile() { return $this->profile; }
  41
  42         /// Search engine
  43         protected $searchEngine;
  44
  45         /// For links
  46         protected $extraParams = array();
  47
  48         /// No idea, apparently used by some other classes
  49         protected $mPrefix;
  50
  51         /**
  52          * @var int
  53          */
  54         protected $limit, $offset;
  55
  56         /**
  57          * @var array
  58          */
  59         protected $namespaces;
  60         function getNamespaces() { return $this->namespaces; }
  61
  62         /**
  63          * @var bool
  64          */
  65         protected $searchRedirects;
  66
  67         /**
  68          * @var string
  69          */
  70         protected $didYouMeanHtml, $fulltext;
  71
  72         const NAMESPACES_CURRENT = 'sense';
  73
  74         public function __construct() {
  75                 parent::__construct( 'Search' );
  76         }
  77
  78         /**
  79          * Entry point
  80          *
  81          * @param string $par or null
  82          */
  83         public function execute( $par ) {
  84                 $this->setHeaders();
  85                 $this->outputHeader();
  86                 $out = $this->getOutput();
  87                 $out->allowClickjacking();
  88                 $out->addModuleStyles( 'mediawiki.special' );
  89
  90                 // Strip underscores from title parameter; most of the time we'll want
  91                 // text form here. But don't strip underscores from actual text params!
  92                 $titleParam = str_replace( '_', ' ', $par );
  93
  94                 $request = $this->getRequest();
  95
  96                 // Fetch the search term
  97                 $search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );
  98
  99                 $this->load();
 100
 101                 if ( $request->getVal( 'fulltext' )
 102                         || !is_null( $request->getVal( 'offset' ) )
 103                         || !is_null( $request->getVal( 'searchx' ) ) )
 104                 {
 105                         $this->showResults( $search );
 106                 } else {
 107                         $this->goResult( $search );
 108                 }
 109         }
 110
 111         /**
 112          * Set up basic search parameters from the request and user settings.
 113          *
 114          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 115          */
 116         public function load() {
 117                 $request = $this->getRequest();
 118                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, 'searchlimit' );
 119                 $this->mPrefix = $request->getVal( 'prefix', '' );
 120
 121                 $user = $this->getUser();
 122
 123                 # Extract manually requested namespaces
 124                 $nslist = $this->powerSearch( $request );
 125                 if ( !count( $nslist ) ) {
 126                         # Fallback to user preference
 127                         $nslist = SearchEngine::userNamespaces( $user );
 128                 }
 129
 130                 $profile = null;
 131                 if ( !count( $nslist ) ) {
 132                         $profile = 'default';
 133                 }
 134
 135                 $profile = $request->getVal( 'profile', $profile );
 136                 $profiles = $this->getSearchProfiles();
 137                 if ( $profile === null ) {
 138                         // BC with old request format
 139                         $profile = 'advanced';
 140                         foreach ( $profiles as $key => $data ) {
 141                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 142                                         $profile = $key;
 143                                 }
 144                         }
 145                         $this->namespaces = $nslist;
 146                 } elseif ( $profile === 'advanced' ) {
 147                         $this->namespaces = $nslist;
 148                 } else {
 149                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 150                                 $this->namespaces = $profiles[$profile]['namespaces'];
 151                         } else {
 152                                 // Unknown profile requested
 153                                 $profile = 'default';
 154                                 $this->namespaces = $profiles['default']['namespaces'];
 155                         }
 156                 }
 157
 158                 // Redirects defaults to true, but we don't know whether it was ticked of or just missing
 159                 $default = $request->getBool( 'profile' ) ? 0 : 1;
 160                 $this->searchRedirects = $request->getBool( 'redirs', $default ) ? 1 : 0;
 161                 $this->didYouMeanHtml = ''; # html of did you mean... link
 162                 $this->fulltext = $request->getVal( 'fulltext' );
 163                 $this->profile = $profile;
 164         }
 165
 166         /**
 167          * If an exact title match can be found, jump straight ahead to it.
 168          *
 169          * @param $term String
 170          */
 171         public function goResult( $term ) {
 172                 $this->setupPage( $term );
 173                 # Try to go to page as entered.
 174                 $t = Title::newFromText( $term );
 175                 # If the string cannot be used to create a title
 176                 if ( is_null( $t ) ) {
 177                         $this->showResults( $term );
 178                         return;
 179                 }
 180                 # If there's an exact or very near match, jump right there.
 181                 $t = SearchEngine::getNearMatch( $term );
 182
 183                 if ( !wfRunHooks( 'SpecialSearchGo', array( &$t, &$term ) ) ) {
 184                         # Hook requested termination
 185                         return;
 186                 }
 187
 188                 if ( !is_null( $t ) ) {
 189                         $this->getOutput()->redirect( $t->getFullURL() );
 190                         return;
 191                 }
 192                 # No match, generate an edit URL
 193                 $t = Title::newFromText( $term );
 194                 if ( !is_null( $t ) ) {
 195                         global $wgGoToEdit;
 196                         wfRunHooks( 'SpecialSearchNogomatch', array( &$t ) );
 197                         wfDebugLog( 'nogomatch', $t->getText(), false );
 198
 199                         # If the feature is enabled, go straight to the edit page
 200                         if ( $wgGoToEdit ) {
 201                                 $this->getOutput()->redirect( $t->getFullURL( array( 'action' => 'edit' ) ) );
 202                                 return;
 203                         }
 204                 }
 205                 $this->showResults( $term );
 206         }
 207
 208         /**
 209          * @param $term String
 210          */
 211         public function showResults( $term ) {
 212                 global $wgDisableTextSearch, $wgSearchForwardUrl, $wgContLang, $wgScript;
 213                 wfProfileIn( __METHOD__ );
 214
 215                 $search = $this->getSearchEngine();
 216                 $search->setLimitOffset( $this->limit, $this->offset );
 217                 $search->setNamespaces( $this->namespaces );
 218                 $search->showRedirects = $this->searchRedirects; // BC
 219                 $search->setFeatureData( 'list-redirects', $this->searchRedirects );
 220                 $search->prefix = $this->mPrefix;
 221                 $term = $search->transformSearchTerm( $term );
 222
 223                 wfRunHooks( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 224
 225                 $this->setupPage( $term );
 226
 227                 $out = $this->getOutput();
 228
 229                 if ( $wgDisableTextSearch ) {
 230                         if ( $wgSearchForwardUrl ) {
 231                                 $url = str_replace( '$1', urlencode( $term ), $wgSearchForwardUrl );
 232                                 $out->redirect( $url );
 233                         } else {
 234                                 $out->addHTML(
 235                                         Xml::openElement( 'fieldset' ) .
 236                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 237                                         Xml::element( 'p', array( 'class' => 'mw-searchdisabled' ), $this->msg( 'searchdisabled' )->text() ) .
 238                                         $this->msg( 'googlesearch' )->rawParams(
 239                                                 htmlspecialchars( $term ),
 240                                                 'UTF-8',
 241                                                 $this->msg( 'searchbutton' )->escaped()
 242                                         )->text() .
 243                                         Xml::closeElement( 'fieldset' )
 244                                 );
 245                         }
 246                         wfProfileOut( __METHOD__ );
 247                         return;
 248                 }
 249
 250                 $t = Title::newFromText( $term );
 251
 252                 // fetch search results
 253                 $rewritten = $search->replacePrefixes( $term );
 254
 255                 $titleMatches = $search->searchTitle( $rewritten );
 256                 if ( !( $titleMatches instanceof SearchResultTooMany ) ) {
 257                         $textMatches = $search->searchText( $rewritten );
 258                 }
 259
 260                 $textStatus = null;
 261                 if ( $textMatches instanceof Status ) {
 262                         $textStatus = $textMatches;
 263                         $textMatches = null;
 264                 }
 265
 266                 // did you mean... suggestions
 267                 if ( $textMatches && !$textStatus && $textMatches->hasSuggestion() ) {
 268                         $st = SpecialPage::getTitleFor( 'Search' );
 269
 270                         # mirror Go/Search behavior of original request ..
 271                         $didYouMeanParams = array( 'search' => $textMatches->getSuggestionQuery() );
 272
 273                         if ( $this->fulltext != null ) {
 274                                 $didYouMeanParams['fulltext'] = $this->fulltext;
 275                         }
 276
 277                         $stParams = array_merge(
 278                                 $didYouMeanParams,
 279                                 $this->powerSearchOptions()
 280                         );
 281
 282                         $suggestionSnippet = $textMatches->getSuggestionSnippet();
 283
 284                         if ( $suggestionSnippet == '' ) {
 285                                 $suggestionSnippet = null;
 286                         }
 287
 288                         $suggestLink = Linker::linkKnown(
 289                                 $st,
 290                                 $suggestionSnippet,
 291                                 array(),
 292                                 $stParams
 293                         );
 294
 295                         $this->didYouMeanHtml = '<div class="searchdidyoumean">' . $this->msg( 'search-suggest' )->rawParams( $suggestLink )->text() . '</div>';
 296                 }
 297
 298                 if ( !wfRunHooks( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 299                         # Hook requested termination
 300                         wfProfileOut( __METHOD__ );
 301                         return;
 302                 }
 303
 304                 // start rendering the page
 305                 $out->addHtml(
 306                         Xml::openElement(
 307                                 'form',
 308                                 array(
 309                                         'id' => ( $this->profile === 'advanced' ? 'powersearch' : 'search' ),
 310                                         'method' => 'get',
 311                                         'action' => $wgScript
 312                                 )
 313                         )
 314                 );
 315                 $out->addHtml(
 316                         Xml::openElement( 'table', array( 'id' => 'mw-search-top-table', 'cellpadding' => 0, 'cellspacing' => 0 ) ) .
 317                         Xml::openElement( 'tr' ) .
 318                         Xml::openElement( 'td' ) . "\n" .
 319                         $this->shortDialog( $term ) .
 320                         Xml::closeElement( 'td' ) .
 321                         Xml::closeElement( 'tr' ) .
 322                         Xml::closeElement( 'table' )
 323                 );
 324
 325                 // Sometimes the search engine knows there are too many hits
 326                 if ( $titleMatches instanceof SearchResultTooMany ) {
 327                         $out->wrapWikiMsg( "==$1==\n", 'toomanymatches' );
 328                         wfProfileOut( __METHOD__ );
 329                         return;
 330                 }
 331
 332                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 333                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 334                         $out->addHTML( $this->formHeader( $term, 0, 0 ) );
 335                         $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 336                         $out->addHTML( '</form>' );
 337                         // Empty query -- straight view of search form
 338                         wfProfileOut( __METHOD__ );
 339                         return;
 340                 }
 341
 342                 // Get number of results
 343                 $titleMatchesNum = $titleMatches ? $titleMatches->numRows() : 0;
 344                 $textMatchesNum = $textMatches ? $textMatches->numRows() : 0;
 345                 // Total initial query matches (possible false positives)
 346                 $num = $titleMatchesNum + $textMatchesNum;
 347
 348                 // Get total actual results (after second filtering, if any)
 349                 $numTitleMatches = $titleMatches && !is_null( $titleMatches->getTotalHits() ) ?
 350                         $titleMatches->getTotalHits() : $titleMatchesNum;
 351                 $numTextMatches = $textMatches && !is_null( $textMatches->getTotalHits() ) ?
 352                         $textMatches->getTotalHits() : $textMatchesNum;
 353
 354                 // get total number of results if backend can calculate it
 355                 $totalRes = 0;
 356                 if ( $titleMatches && !is_null( $titleMatches->getTotalHits() ) ) {
 357                         $totalRes += $titleMatches->getTotalHits();
 358                 }
 359                 if ( $textMatches && !is_null( $textMatches->getTotalHits() ) ) {
 360                         $totalRes += $textMatches->getTotalHits();
 361                 }
 362
 363                 // show number of results and current offset
 364                 $out->addHTML( $this->formHeader( $term, $num, $totalRes ) );
 365                 $out->addHtml( $this->getProfileForm( $this->profile, $term ) );
 366
 367                 $out->addHtml( Xml::closeElement( 'form' ) );
 368                 $out->addHtml( "<div class='searchresults'>" );
 369
 370                 // prev/next links
 371                 if ( $num || $this->offset ) {
 372                         // Show the create link ahead
 373                         $this->showCreateLink( $t );
 374                         $prevnext = $this->getLanguage()->viewPrevNext( $this->getTitle(), $this->offset, $this->limit,
 375                                 $this->powerSearchOptions() + array( 'search' => $term ),
 376                                 max( $titleMatchesNum, $textMatchesNum ) < $this->limit
 377                         );
 378                         //$out->addHTML( "<p class='mw-search-pager-top'>{$prevnext}</p>\n" );
 379                         wfRunHooks( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 380                 } else {
 381                         wfRunHooks( 'SpecialSearchNoResults', array( $term ) );
 382                 }
 383
 384                 $out->parserOptions()->setEditSection( false );
 385                 if ( $titleMatches ) {
 386                         if ( $numTitleMatches > 0 ) {
 387                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 388                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 389                         }
 390                         $titleMatches->free();
 391                 }
 392                 if ( $textMatches && !$textStatus ) {
 393                         // output appropriate heading
 394                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 395                                 // if no title matches the heading is redundant
 396                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 397                         } elseif ( $totalRes == 0 ) {
 398                                 # Don't show the 'no text matches' if we received title matches
 399                                 # $out->wrapWikiMsg( "==$1==\n", 'notextmatches' );
 400                         }
 401                         // show interwiki results if any
 402                         if ( $textMatches->hasInterwikiResults() ) {
 403                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 404                         }
 405                         // show results
 406                         if ( $numTextMatches > 0 ) {
 407                                 $out->addHTML( $this->showMatches( $textMatches ) );
 408                         }
 409
 410                         $textMatches->free();
 411                 }
 412                 if ( $num === 0 ) {
 413                         if ( $textStatus ) {
 414                                 $out->addHTML( '<div class="error">' .
 415                                         htmlspecialchars( $textStatus->getWikiText( 'search-error' ) ) . '</div>' );
 416                         } else {
 417                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 418                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 419                                 $this->showCreateLink( $t );
 420                         }
 421                 }
 422                 $out->addHtml( "</div>" );
 423
 424                 if ( $num || $this->offset ) {
 425                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 426                 }
 427                 wfRunHooks( 'SpecialSearchResultsAppend', array( $this, $out, $term ) );
 428                 wfProfileOut( __METHOD__ );
 429         }
 430
 431         /**
 432          * @param $t Title
 433          */
 434         protected function showCreateLink( $t ) {
 435                 // show direct page/create link if applicable
 436
 437                 // Check DBkey !== '' in case of fragment link only.
 438                 if ( is_null( $t ) || $t->getDBkey() === '' ) {
 439                         // invalid title
 440                         // preserve the paragraph for margins etc...
 441                         $this->getOutput()->addHtml( '<p></p>' );
 442                         return;
 443                 }
 444
 445                 if ( $t->isKnown() ) {
 446                         $messageName = 'searchmenu-exists';
 447                 } elseif ( $t->userCan( 'create', $this->getUser() ) ) {
 448                         $messageName = 'searchmenu-new';
 449                 } else {
 450                         $messageName = 'searchmenu-new-nocreate';
 451                 }
 452                 $params = array( $messageName, wfEscapeWikiText( $t->getPrefixedText() ) );
 453                 wfRunHooks( 'SpecialSearchCreateLink', array( $t, &$params ) );
 454
 455                 // Extensions using the hook might still return an empty $messageName
 456                 if ( $messageName ) {
 457                         $this->getOutput()->wrapWikiMsg( "<p class=\"mw-search-createlink\">\n$1</p>", $params );
 458                 } else {
 459                         // preserve the paragraph for margins etc...
 460                         $this->getOutput()->addHtml( '<p></p>' );
 461                 }
 462         }
 463
 464         /**
 465          * @param $term string
 466          */
 467         protected function setupPage( $term ) {
 468                 # Should advanced UI be used?
 469                 $this->searchAdvanced = ( $this->profile === 'advanced' );
 470                 $out = $this->getOutput();
 471                 if ( strval( $term ) !== '' ) {
 472                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 473                         $out->setHTMLTitle( $this->msg( 'pagetitle' )->rawParams(
 474                                 $this->msg( 'searchresults-title' )->rawParams( $term )->text()
 475                         ) );
 476                 }
 477                 // add javascript specific to special:search
 478                 $out->addModules( 'mediawiki.special.search' );
 479         }
 480
 481         /**
 482          * Extract "power search" namespace settings from the request object,
 483          * returning a list of index numbers to search.
 484          *
 485          * @param $request WebRequest
 486          * @return Array
 487          */
 488         protected function powerSearch( &$request ) {
 489                 $arr = array();
 490                 foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
 491                         if ( $request->getCheck( 'ns' . $ns ) ) {
 492                                 $arr[] = $ns;
 493                         }
 494                 }
 495
 496                 return $arr;
 497         }
 498
 499         /**
 500          * Reconstruct the 'power search' options for links
 501          *
 502          * @return Array
 503          */
 504         protected function powerSearchOptions() {
 505                 $opt = array();
 506                 $opt['redirs'] = $this->searchRedirects ? 1 : 0;
 507                 if ( $this->profile !== 'advanced' ) {
 508                         $opt['profile'] = $this->profile;
 509                 } else {
 510                         foreach ( $this->namespaces as $n ) {
 511                                 $opt['ns' . $n] = 1;
 512                         }
 513                 }
 514                 return $opt + $this->extraParams;
 515         }
 516
 517         /**
 518          * Show whole set of results
 519          *
 520          * @param $matches SearchResultSet
 521          *
 522          * @return string
 523          */
 524         protected function showMatches( &$matches ) {
 525                 global $wgContLang;
 526                 wfProfileIn( __METHOD__ );
 527
 528                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 529
 530                 $out = "";
 531                 $infoLine = $matches->getInfo();
 532                 if ( !is_null( $infoLine ) ) {
 533                         $out .= "\n<!-- {$infoLine} -->\n";
 534                 }
 535                 $out .= "<ul class='mw-search-results'>\n";
 536                 $result = $matches->next();
 537                 while ( $result ) {
 538                         $out .= $this->showHit( $result, $terms );
 539                         $result = $matches->next();
 540                 }
 541                 $out .= "</ul>\n";
 542
 543                 // convert the whole thing to desired language variant
 544                 $out = $wgContLang->convert( $out );
 545                 wfProfileOut( __METHOD__ );
 546                 return $out;
 547         }
 548
 549         /**
 550          * Format a single hit result
 551          *
 552          * @param $result SearchResult
 553          * @param array $terms terms to highlight
 554          *
 555          * @return string
 556          */
 557         protected function showHit( $result, $terms ) {
 558                 wfProfileIn( __METHOD__ );
 559
 560                 if ( $result->isBrokenTitle() ) {
 561                         wfProfileOut( __METHOD__ );
 562                         return "<!-- Broken link in search result -->\n";
 563                 }
 564
 565                 $t = $result->getTitle();
 566
 567                 $titleSnippet = $result->getTitleSnippet( $terms );
 568
 569                 if ( $titleSnippet == '' ) {
 570                         $titleSnippet = null;
 571                 }
 572
 573                 $link_t = clone $t;
 574
 575                 wfRunHooks( 'ShowSearchHitTitle',
 576                                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 577
 578                 $link = Linker::linkKnown(
 579                         $link_t,
 580                         $titleSnippet
 581                 );
 582
 583                 //If page content is not readable, just return the title.
 584                 //This is not quite safe, but better than showing excerpts from non-readable pages
 585                 //Note that hiding the entry entirely would screw up paging.
 586                 if ( !$t->userCan( 'read', $this->getUser() ) ) {
 587                         wfProfileOut( __METHOD__ );
 588                         return "<li>{$link}</li>\n";
 589                 }
 590
 591                 // If the page doesn't *exist*... our search index is out of date.
 592                 // The least confusing at this point is to drop the result.
 593                 // You may get less results, but... oh well. :P
 594                 if ( $result->isMissingRevision() ) {
 595                         wfProfileOut( __METHOD__ );
 596                         return "<!-- missing page " . htmlspecialchars( $t->getPrefixedText() ) . "-->\n";
 597                 }
 598
 599                 // format redirects / relevant sections
 600                 $redirectTitle = $result->getRedirectTitle();
 601                 $redirectText = $result->getRedirectSnippet( $terms );
 602                 $sectionTitle = $result->getSectionTitle();
 603                 $sectionText = $result->getSectionSnippet( $terms );
 604                 $redirect = '';
 605
 606                 if ( !is_null( $redirectTitle ) ) {
 607                         if ( $redirectText == '' ) {
 608                                 $redirectText = null;
 609                         }
 610
 611                         $redirect = "<span class='searchalttitle'>" .
 612                                 $this->msg( 'search-redirect' )->rawParams(
 613                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 614                                 "</span>";
 615                 }
 616
 617                 $section = '';
 618
 619                 if ( !is_null( $sectionTitle ) ) {
 620                         if ( $sectionText == '' ) {
 621                                 $sectionText = null;
 622                         }
 623
 624                         $section = "<span class='searchalttitle'>" .
 625                                 $this->msg( 'search-section' )->rawParams(
 626                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 627                                 "</span>";
 628                 }
 629
 630                 // format text extract
 631                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 632
 633                 $lang = $this->getLanguage();
 634
 635                 // format score
 636                 if ( is_null( $result->getScore() ) ) {
 637                         // Search engine doesn't report scoring info
 638                         $score = '';
 639                 } else {
 640                         $percent = sprintf( '%2.1f', $result->getScore() * 100 );
 641                         $score = $this->msg( 'search-result-score' )->numParams( $percent )->text()
 642                                 . ' - ';
 643                 }
 644
 645                 // format description
 646                 $byteSize = $result->getByteSize();
 647                 $wordCount = $result->getWordCount();
 648                 $timestamp = $result->getTimestamp();
 649                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 650                         ->numParams( $wordCount )->escaped();
 651
 652                 if ( $t->getNamespace() == NS_CATEGORY ) {
 653                         $cat = Category::newFromTitle( $t );
 654                         $size = $this->msg( 'search-result-category-size' )
 655                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 656                                 ->escaped();
 657                 }
 658
 659                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 660
 661                 // link to related articles if supported
 662                 $related = '';
 663                 if ( $result->hasRelated() ) {
 664                         $st = SpecialPage::getTitleFor( 'Search' );
 665                         $stParams = array_merge(
 666                                 $this->powerSearchOptions(),
 667                                 array(
 668                                         'search' => $this->msg( 'searchrelated' )->inContentLanguage()->text() .
 669                                                 ':' . $t->getPrefixedText(),
 670                                         'fulltext' => $this->msg( 'search' )->text()
 671                                 )
 672                         );
 673
 674                         $related = ' -- ' . Linker::linkKnown(
 675                                 $st,
 676                                 $this->msg( 'search-relatedarticle' )->text(),
 677                                 array(),
 678                                 $stParams
 679                         );
 680                 }
 681
 682                 // Include a thumbnail for media files...
 683                 if ( $t->getNamespace() == NS_FILE ) {
 684                         $img = wfFindFile( $t );
 685                         if ( $img ) {
 686                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 687                                 if ( $thumb ) {
 688                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 689                                         wfProfileOut( __METHOD__ );
 690                                         // Float doesn't seem to interact well with the bullets.
 691                                         // Table messes up vertical alignment of the bullets.
 692                                         // Bullets are therefore disabled (didn't look great anyway).
 693                                         return "<li>" .
 694                                                 '<table class="searchResultImage">' .
 695                                                 '<tr>' .
 696                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 697                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 698                                                 '</td>' .
 699                                                 '<td style="vertical-align: top;">' .
 700                                                 $link .
 701                                                 $extract .
 702                                                 "<div class='mw-search-result-data'>{$score}{$desc} - {$date}{$related}</div>" .
 703                                                 '</td>' .
 704                                                 '</tr>' .
 705                                                 '</table>' .
 706                                                 "</li>\n";
 707                                 }
 708                         }
 709                 }
 710
 711                 $html = null;
 712
 713                 if ( wfRunHooks( 'ShowSearchHit', array(
 714                         $this, $result, $terms,
 715                         &$link, &$redirect, &$section, &$extract,
 716                         &$score, &$size, &$date, &$related,
 717                         &$html
 718                 ) ) ) {
 719                         $html = "<li><div class='mw-search-result-heading'>{$link} {$redirect} {$section}</div> {$extract}\n" .
 720                                 "<div class='mw-search-result-data'>{$score}{$size} - {$date}{$related}</div>" .
 721                                 "</li>\n";
 722                 }
 723
 724                 wfProfileOut( __METHOD__ );
 725                 return $html;
 726         }
 727
 728         /**
 729          * Show results from other wikis
 730          *
 731          * @param $matches SearchResultSet
 732          * @param $query String
 733          *
 734          * @return string
 735          */
 736         protected function showInterwiki( &$matches, $query ) {
 737                 global $wgContLang;
 738                 wfProfileIn( __METHOD__ );
 739                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 740
 741                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 742                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 743                 $out .= "<ul class='mw-search-iwresults'>\n";
 744
 745                 // work out custom project captions
 746                 $customCaptions = array();
 747                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() ); // format per line <iwprefix>:<caption>
 748                 foreach ( $customLines as $line ) {
 749                         $parts = explode( ":", $line, 2 );
 750                         if ( count( $parts ) == 2 ) { // validate line
 751                                 $customCaptions[$parts[0]] = $parts[1];
 752                         }
 753                 }
 754
 755                 $prev = null;
 756                 $result = $matches->next();
 757                 while ( $result ) {
 758                         $out .= $this->showInterwikiHit( $result, $prev, $terms, $query, $customCaptions );
 759                         $prev = $result->getInterwikiPrefix();
 760                         $result = $matches->next();
 761                 }
 762                 // TODO: should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 763                 $out .= "</ul></div>\n";
 764
 765                 // convert the whole thing to desired language variant
 766                 $out = $wgContLang->convert( $out );
 767                 wfProfileOut( __METHOD__ );
 768                 return $out;
 769         }
 770
 771         /**
 772          * Show single interwiki link
 773          *
 774          * @param $result SearchResult
 775          * @param $lastInterwiki String
 776          * @param $terms Array
 777          * @param $query String
 778          * @param array $customCaptions iw prefix -> caption
 779          *
 780          * @return string
 781          */
 782         protected function showInterwikiHit( $result, $lastInterwiki, $terms, $query, $customCaptions ) {
 783                 wfProfileIn( __METHOD__ );
 784
 785                 if ( $result->isBrokenTitle() ) {
 786                         wfProfileOut( __METHOD__ );
 787                         return "<!-- Broken link in search result -->\n";
 788                 }
 789
 790                 $t = $result->getTitle();
 791
 792                 $titleSnippet = $result->getTitleSnippet( $terms );
 793
 794                 if ( $titleSnippet == '' ) {
 795                         $titleSnippet = null;
 796                 }
 797
 798                 $link = Linker::linkKnown(
 799                         $t,
 800                         $titleSnippet
 801                 );
 802
 803                 // format redirect if any
 804                 $redirectTitle = $result->getRedirectTitle();
 805                 $redirectText = $result->getRedirectSnippet( $terms );
 806                 $redirect = '';
 807                 if ( !is_null( $redirectTitle ) ) {
 808                         if ( $redirectText == '' ) {
 809                                 $redirectText = null;
 810                         }
 811
 812                         $redirect = "<span class='searchalttitle'>" .
 813                                 $this->msg( 'search-redirect' )->rawParams(
 814                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 815                                 "</span>";
 816                 }
 817
 818                 $out = "";
 819                 // display project name
 820                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $t->getInterwiki() ) {
 821                         if ( array_key_exists( $t->getInterwiki(), $customCaptions ) ) {
 822                                 // captions from 'search-interwiki-custom'
 823                                 $caption = $customCaptions[$t->getInterwiki()];
 824                         } else {
 825                                 // default is to show the hostname of the other wiki which might suck
 826                                 // if there are many wikis on one hostname
 827                                 $parsed = wfParseUrl( $t->getFullURL() );
 828                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 829                         }
 830                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 831                         $searchTitle = Title::newFromText( $t->getInterwiki() . ":Special:Search" );
 832                         $searchLink = Linker::linkKnown(
 833                                 $searchTitle,
 834                                 $this->msg( 'search-interwiki-more' )->text(),
 835                                 array(),
 836                                 array(
 837                                         'search' => $query,
 838                                         'fulltext' => 'Search'
 839                                 )
 840                         );
 841                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 842                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 843                 }
 844
 845                 $out .= "<li>{$link} {$redirect}</li>\n";
 846                 wfProfileOut( __METHOD__ );
 847                 return $out;
 848         }
 849
 850         /**
 851          * @param $profile
 852          * @param $term
 853          * @return String
 854          */
 855         protected function getProfileForm( $profile, $term ) {
 856                 // Hidden stuff
 857                 $opts = array();
 858                 $opts['redirs'] = $this->searchRedirects;
 859                 $opts['profile'] = $this->profile;
 860
 861                 if ( $profile === 'advanced' ) {
 862                         return $this->powerSearchBox( $term, $opts );
 863                 } else {
 864                         $form = '';
 865                         wfRunHooks( 'SpecialSearchProfileForm', array( $this, &$form, $profile, $term, $opts ) );
 866                         return $form;
 867                 }
 868         }
 869
 870         /**
 871          * Generates the power search box at [[Special:Search]]
 872          *
 873          * @param string $term search term
 874          * @param $opts array
 875          * @return String: HTML form
 876          */
 877         protected function powerSearchBox( $term, $opts ) {
 878                 // Groups namespaces into rows according to subject
 879                 $rows = array();
 880                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 881                         $subject = MWNamespace::getSubject( $namespace );
 882                         if ( !array_key_exists( $subject, $rows ) ) {
 883                                 $rows[$subject] = "";
 884                         }
 885                         $name = str_replace( '_', ' ', $name );
 886                         if ( $name == '' ) {
 887                                 $name = $this->msg( 'blanknamespace' )->text();
 888                         }
 889                         $rows[$subject] .=
 890                                 Xml::openElement(
 891                                         'td', array( 'style' => 'white-space: nowrap' )
 892                                 ) .
 893                                 Xml::checkLabel(
 894                                         $name,
 895                                         "ns{$namespace}",
 896                                         "mw-search-ns{$namespace}",
 897                                         in_array( $namespace, $this->namespaces )
 898                                 ) .
 899                                 Xml::closeElement( 'td' );
 900                 }
 901                 $rows = array_values( $rows );
 902                 $numRows = count( $rows );
 903
 904                 // Lays out namespaces in multiple floating two-column tables so they'll
 905                 // be arranged nicely while still accommodating different screen widths
 906                 $namespaceTables = '';
 907                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 908                         $namespaceTables .= Xml::openElement(
 909                                 'table',
 910                                 array( 'cellpadding' => 0, 'cellspacing' => 0 )
 911                         );
 912                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 913                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 914                         }
 915                         $namespaceTables .= Xml::closeElement( 'table' );
 916                 }
 917
 918                 $showSections = array( 'namespaceTables' => $namespaceTables );
 919
 920                 // Show redirects check only if backend supports it
 921                 if ( $this->getSearchEngine()->supports( 'list-redirects' ) ) {
 922                         $showSections['redirects'] =
 923                                 Xml::checkLabel( $this->msg( 'powersearch-redir' )->text(), 'redirs', 'redirs', $this->searchRedirects );
 924                 }
 925
 926                 wfRunHooks( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 927
 928                 $hidden = '';
 929                 unset( $opts['redirs'] );
 930                 foreach ( $opts as $key => $value ) {
 931                         $hidden .= Html::hidden( $key, $value );
 932                 }
 933                 // Return final output
 934                 return Xml::openElement(
 935                                 'fieldset',
 936                                 array( 'id' => 'mw-searchoptions', 'style' => 'margin:0em;' )
 937                         ) .
 938                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
 939                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
 940                         Html::element( 'div', array( 'id' => 'mw-search-togglebox' ) ) .
 941                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
 942                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
 943                         $hidden .
 944                         Xml::closeElement( 'fieldset' );
 945         }
 946
 947         /**
 948          * @return array
 949          */
 950         protected function getSearchProfiles() {
 951                 // Builds list of Search Types (profiles)
 952                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
 953
 954                 $profiles = array(
 955                         'default' => array(
 956                                 'message' => 'searchprofile-articles',
 957                                 'tooltip' => 'searchprofile-articles-tooltip',
 958                                 'namespaces' => SearchEngine::defaultNamespaces(),
 959                                 'namespace-messages' => SearchEngine::namespacesAsText(
 960                                         SearchEngine::defaultNamespaces()
 961                                 ),
 962                         ),
 963                         'images' => array(
 964                                 'message' => 'searchprofile-images',
 965                                 'tooltip' => 'searchprofile-images-tooltip',
 966                                 'namespaces' => array( NS_FILE ),
 967                         ),
 968                         'help' => array(
 969                                 'message' => 'searchprofile-project',
 970                                 'tooltip' => 'searchprofile-project-tooltip',
 971                                 'namespaces' => SearchEngine::helpNamespaces(),
 972                                 'namespace-messages' => SearchEngine::namespacesAsText(
 973                                         SearchEngine::helpNamespaces()
 974                                 ),
 975                         ),
 976                         'all' => array(
 977                                 'message' => 'searchprofile-everything',
 978                                 'tooltip' => 'searchprofile-everything-tooltip',
 979                                 'namespaces' => $nsAllSet,
 980                         ),
 981                         'advanced' => array(
 982                                 'message' => 'searchprofile-advanced',
 983                                 'tooltip' => 'searchprofile-advanced-tooltip',
 984                                 'namespaces' => self::NAMESPACES_CURRENT,
 985                         )
 986                 );
 987
 988                 wfRunHooks( 'SpecialSearchProfiles', array( &$profiles ) );
 989
 990                 foreach ( $profiles as &$data ) {
 991                         if ( !is_array( $data['namespaces'] ) ) {
 992                                 continue;
 993                         }
 994                         sort( $data['namespaces'] );
 995                 }
 996
 997                 return $profiles;
 998         }
 999
1000         /**
1001          * @param $term
1002          * @param $resultsShown
1003          * @param $totalNum
1004          * @return string
1005          */
1006         protected function formHeader( $term, $resultsShown, $totalNum ) {
1007                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-formheader' ) );
1008
1009                 $bareterm = $term;
1010                 if ( $this->startsWithImage( $term ) ) {
1011                         // Deletes prefixes
1012                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1013                 }
1014
1015                 $profiles = $this->getSearchProfiles();
1016                 $lang = $this->getLanguage();
1017
1018                 // Outputs XML for Search Types
1019                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1020                 $out .= Xml::openElement( 'ul' );
1021                 foreach ( $profiles as $id => $profile ) {
1022                         if ( !isset( $profile['parameters'] ) ) {
1023                                 $profile['parameters'] = array();
1024                         }
1025                         $profile['parameters']['profile'] = $id;
1026
1027                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1028                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1029                         $out .= Xml::tags(
1030                                 'li',
1031                                 array(
1032                                         'class' => $this->profile === $id ? 'current' : 'normal'
1033                                 ),
1034                                 $this->makeSearchLink(
1035                                         $bareterm,
1036                                         array(),
1037                                         $this->msg( $profile['message'] )->text(),
1038                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1039                                         $profile['parameters']
1040                                 )
1041                         );
1042                 }
1043                 $out .= Xml::closeElement( 'ul' );
1044                 $out .= Xml::closeElement( 'div' );
1045
1046                 // Results-info
1047                 if ( $resultsShown > 0 ) {
1048                         if ( $totalNum > 0 ) {
1049                                 $top = $this->msg( 'showingresultsheader' )
1050                                         ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1051                                         ->params( wfEscapeWikiText( $term ) )
1052                                         ->numParams( $resultsShown )
1053                                         ->parse();
1054                         } elseif ( $resultsShown >= $this->limit ) {
1055                                 $top = $this->msg( 'showingresults' )
1056                                         ->numParams( $this->limit, $this->offset + 1 )
1057                                         ->parse();
1058                         } else {
1059                                 $top = $this->msg( 'showingresultsnum' )
1060                                         ->numParams( $this->limit, $this->offset + 1, $resultsShown )
1061                                         ->parse();
1062                         }
1063                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ),
1064                                 Xml::tags( 'ul', null, Xml::tags( 'li', null, $top ) )
1065                         );
1066                 }
1067
1068                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1069                 $out .= Xml::closeElement( 'div' );
1070
1071                 return $out;
1072         }
1073
1074         /**
1075          * @param $term string
1076          * @return string
1077          */
1078         protected function shortDialog( $term ) {
1079                 $out = Html::hidden( 'title', $this->getTitle()->getPrefixedText() );
1080                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1081                 // Term box
1082                 $out .= Html::input( 'search', $term, 'search', array(
1083                         'id' => $this->profile === 'advanced' ? 'powerSearchText' : 'searchText',
1084                         'size' => '50',
1085                         'autofocus'
1086                 ) ) . "\n";
1087                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1088                 $out .= Xml::submitButton( $this->msg( 'searchbutton' )->text() ) . "\n";
1089                 return $out . $this->didYouMeanHtml;
1090         }
1091
1092         /**
1093          * Make a search link with some target namespaces
1094          *
1095          * @param $term String
1096          * @param array $namespaces ignored
1097          * @param string $label link's text
1098          * @param string $tooltip link's tooltip
1099          * @param array $params query string parameters
1100          * @return String: HTML fragment
1101          */
1102         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1103                 $opt = $params;
1104                 foreach ( $namespaces as $n ) {
1105                         $opt['ns' . $n] = 1;
1106                 }
1107                 $opt['redirs'] = $this->searchRedirects;
1108
1109                 $stParams = array_merge(
1110                         array(
1111                                 'search' => $term,
1112                                 'fulltext' => $this->msg( 'search' )->text()
1113                         ),
1114                         $opt
1115                 );
1116
1117                 return Xml::element(
1118                         'a',
1119                         array(
1120                                 'href' => $this->getTitle()->getLocalURL( $stParams ),
1121                                 'title' => $tooltip
1122                         ),
1123                         $label
1124                 );
1125         }
1126
1127         /**
1128          * Check if query starts with image: prefix
1129          *
1130          * @param string $term the string to check
1131          * @return Boolean
1132          */
1133         protected function startsWithImage( $term ) {
1134                 global $wgContLang;
1135
1136                 $p = explode( ':', $term );
1137                 if ( count( $p ) > 1 ) {
1138                         return $wgContLang->getNsIndex( $p[0] ) == NS_FILE;
1139                 }
1140                 return false;
1141         }
1142
1143         /**
1144          * Check if query starts with all: prefix
1145          *
1146          * @param string $term the string to check
1147          * @return Boolean
1148          */
1149         protected function startsWithAll( $term ) {
1150
1151                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1152
1153                 $p = explode( ':', $term );
1154                 if ( count( $p ) > 1 ) {
1155                         return $p[0] == $allkeyword;
1156                 }
1157                 return false;
1158         }
1159
1160         /**
1161          * @since 1.18
1162          *
1163          * @return SearchEngine
1164          */
1165         public function getSearchEngine() {
1166                 if ( $this->searchEngine === null ) {
1167                         $this->searchEngine = SearchEngine::create();
1168                 }
1169                 return $this->searchEngine;
1170         }
1171
1172         /**
1173          * Users of hook SpecialSearchSetupEngine can use this to
1174          * add more params to links to not lose selection when
1175          * user navigates search results.
1176          * @since 1.18
1177          *
1178          * @param $key
1179          * @param $value
1180          */
1181         public function setExtraParam( $key, $value ) {
1182                 $this->extraParams[$key] = $value;
1183         }
1184
1185         protected function getGroupName() {
1186                 return 'redirects';
1187         }
1188 }