includes/specials/SpecialSearch.php

   1 <?php
   2 /**
   3  * Implements Special:Search
   4  *
   5  * Copyright © 2004 Brion Vibber <brion@pobox.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  */
  25
  26 /**
  27  * implements Special:Search - Run text & title search and display the output
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialSearch extends SpecialPage {
  31         /**
  32          * Current search profile. Search profile is just a name that identifies
  33          * the active search tab on the search page (content, discussions...)
  34          * For users tt replaces the set of enabled namespaces from the query
  35          * string when applicable. Extensions can add new profiles with hooks
  36          * with custom search options just for that profile.
  37          * @var null|string
  38          */
  39         protected $profile;
  40
  41         /** @var SearchEngine Search engine */
  42         protected $searchEngine;
  43
  44         /** @var string Search engine type, if not default */
  45         protected $searchEngineType;
  46
  47         /** @var array For links */
  48         protected $extraParams = array();
  49
  50         /**
  51          * @var string The prefix url parameter. Set on the searcher and the
  52          * is expected to treat it as prefix filter on titles.
  53          */
  54         protected $mPrefix;
  55
  56         /**
  57          * @var int
  58          */
  59         protected $limit, $offset;
  60
  61         /**
  62          * @var array
  63          */
  64         protected $namespaces;
  65
  66         /**
  67          * @var string
  68          */
  69         protected $fulltext;
  70
  71         /**
  72          * @var bool
  73          */
  74         protected $runSuggestion = true;
  75
  76         const NAMESPACES_CURRENT = 'sense';
  77
  78         public function __construct() {
  79                 parent::__construct( 'Search' );
  80         }
  81
  82         /**
  83          * Entry point
  84          *
  85          * @param string $par
  86          */
  87         public function execute( $par ) {
  88                 $this->setHeaders();
  89                 $this->outputHeader();
  90                 $out = $this->getOutput();
  91                 $out->allowClickjacking();
  92                 $out->addModuleStyles( array(
  93                         'mediawiki.special', 'mediawiki.special.search', 'mediawiki.ui', 'mediawiki.ui.button',
  94                         'mediawiki.ui.input',
  95                 ) );
  96
  97                 // Strip underscores from title parameter; most of the time we'll want
  98                 // text form here. But don't strip underscores from actual text params!
  99                 $titleParam = str_replace( '_', ' ', $par );
 100
 101                 $request = $this->getRequest();
 102
 103                 // Fetch the search term
 104                 $search = str_replace( "\n", " ", $request->getText( 'search', $titleParam ) );
 105
 106                 $this->load();
 107                 if ( !is_null( $request->getVal( 'nsRemember' ) ) ) {
 108                         $this->saveNamespaces();
 109                         // Remove the token from the URL to prevent the user from inadvertently
 110                         // exposing it (e.g. by pasting it into a public wiki page) or undoing
 111                         // later settings changes (e.g. by reloading the page).
 112                         $query = $request->getValues();
 113                         unset( $query['title'], $query['nsRemember'] );
 114                         $out->redirect( $this->getPageTitle()->getFullURL( $query ) );
 115                         return;
 116                 }
 117
 118                 $this->searchEngineType = $request->getVal( 'srbackend' );
 119
 120                 if ( $request->getVal( 'fulltext' )
 121                         || !is_null( $request->getVal( 'offset' ) )
 122                 ) {
 123                         $this->showResults( $search );
 124                 } else {
 125                         $this->goResult( $search );
 126                 }
 127         }
 128
 129         /**
 130          * Set up basic search parameters from the request and user settings.
 131          *
 132          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 133          */
 134         public function load() {
 135                 $request = $this->getRequest();
 136                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '' );
 137                 $this->mPrefix = $request->getVal( 'prefix', '' );
 138
 139                 $user = $this->getUser();
 140
 141                 # Extract manually requested namespaces
 142                 $nslist = $this->powerSearch( $request );
 143                 if ( !count( $nslist ) ) {
 144                         # Fallback to user preference
 145                         $nslist = SearchEngine::userNamespaces( $user );
 146                 }
 147
 148                 $profile = null;
 149                 if ( !count( $nslist ) ) {
 150                         $profile = 'default';
 151                 }
 152
 153                 $profile = $request->getVal( 'profile', $profile );
 154                 $profiles = $this->getSearchProfiles();
 155                 if ( $profile === null ) {
 156                         // BC with old request format
 157                         $profile = 'advanced';
 158                         foreach ( $profiles as $key => $data ) {
 159                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 160                                         $profile = $key;
 161                                 }
 162                         }
 163                         $this->namespaces = $nslist;
 164                 } elseif ( $profile === 'advanced' ) {
 165                         $this->namespaces = $nslist;
 166                 } else {
 167                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 168                                 $this->namespaces = $profiles[$profile]['namespaces'];
 169                         } else {
 170                                 // Unknown profile requested
 171                                 $profile = 'default';
 172                                 $this->namespaces = $profiles['default']['namespaces'];
 173                         }
 174                 }
 175
 176                 $this->fulltext = $request->getVal( 'fulltext' );
 177                 $this->runSuggestion = (bool)$request->getVal( 'runsuggestion', true );
 178                 $this->profile = $profile;
 179         }
 180
 181         /**
 182          * If an exact title match can be found, jump straight ahead to it.
 183          *
 184          * @param string $term
 185          */
 186         public function goResult( $term ) {
 187                 $this->setupPage( $term );
 188                 # Try to go to page as entered.
 189                 $title = Title::newFromText( $term );
 190                 # If the string cannot be used to create a title
 191                 if ( is_null( $title ) ) {
 192                         $this->showResults( $term );
 193
 194                         return;
 195                 }
 196                 # If there's an exact or very near match, jump right there.
 197                 $title = SearchEngine::getNearMatch( $term );
 198
 199                 if ( !is_null( $title ) ) {
 200                         $this->getOutput()->redirect( $title->getFullURL() );
 201
 202                         return;
 203                 }
 204                 # No match, generate an edit URL
 205                 $title = Title::newFromText( $term );
 206                 if ( !is_null( $title ) ) {
 207                         Hooks::run( 'SpecialSearchNogomatch', array( &$title ) );
 208                 }
 209                 $this->showResults( $term );
 210         }
 211
 212         /**
 213          * @param string $term
 214          */
 215         public function showResults( $term ) {
 216                 global $wgContLang;
 217
 218                 $search = $this->getSearchEngine();
 219                 $search->setLimitOffset( $this->limit, $this->offset );
 220                 $search->setNamespaces( $this->namespaces );
 221                 $search->prefix = $this->mPrefix;
 222                 $term = $search->transformSearchTerm( $term );
 223
 224                 Hooks::run( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 225
 226                 $this->setupPage( $term );
 227
 228                 $out = $this->getOutput();
 229
 230                 if ( $this->getConfig()->get( 'DisableTextSearch' ) ) {
 231                         $searchFowardUrl = $this->getConfig()->get( 'SearchForwardUrl' );
 232                         if ( $searchFowardUrl ) {
 233                                 $url = str_replace( '$1', urlencode( $term ), $searchFowardUrl );
 234                                 $out->redirect( $url );
 235                         } else {
 236                                 $out->addHTML(
 237                                         Xml::openElement( 'fieldset' ) .
 238                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 239                                         Xml::element(
 240                                                 'p',
 241                                                 array( 'class' => 'mw-searchdisabled' ),
 242                                                 $this->msg( 'searchdisabled' )->text()
 243                                         ) .
 244                                         $this->msg( 'googlesearch' )->rawParams(
 245                                                 htmlspecialchars( $term ),
 246                                                 'UTF-8',
 247                                                 $this->msg( 'searchbutton' )->escaped()
 248                                         )->text() .
 249                                         Xml::closeElement( 'fieldset' )
 250                                 );
 251                         }
 252
 253                         return;
 254                 }
 255
 256                 $title = Title::newFromText( $term );
 257                 $showSuggestion = $title === null || !$title->isKnown();
 258                 $search->setShowSuggestion( $showSuggestion );
 259
 260                 // fetch search results
 261                 $rewritten = $search->replacePrefixes( $term );
 262
 263                 $titleMatches = $search->searchTitle( $rewritten );
 264                 $textMatches = $search->searchText( $rewritten );
 265
 266                 $textStatus = null;
 267                 if ( $textMatches instanceof Status ) {
 268                         $textStatus = $textMatches;
 269                         $textMatches = null;
 270                 }
 271
 272                 // did you mean... suggestions
 273                 $didYouMeanHtml = '';
 274                 if ( $showSuggestion && $textMatches && !$textStatus ) {
 275                         if ( $this->shouldRunSuggestedQuery( $textMatches ) ) {
 276                                 $newMatches = $search->searchText( $textMatches->getSuggestionQuery() );
 277                                 if ( $newMatches instanceof SearchResultSet && $newMatches->numRows() > 0 ) {
 278                                         $didYouMeanHtml = $this->getDidYouMeanRewrittenHtml( $term, $textMatches );
 279                                         $textMatches = $newMatches;
 280                                 }
 281                         } elseif ( $textMatches->hasSuggestion() ) {
 282                                 $didYouMeanHtml = $this->getDidYouMeanHtml( $textMatches );
 283                         }
 284                 }
 285
 286                 if ( !Hooks::run( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 287                         # Hook requested termination
 288                         return;
 289                 }
 290
 291                 // start rendering the page
 292                 $out->addHtml(
 293                         Xml::openElement(
 294                                 'form',
 295                                 array(
 296                                         'id' => ( $this->isPowerSearch() ? 'powersearch' : 'search' ),
 297                                         'method' => 'get',
 298                                         'action' => wfScript(),
 299                                 )
 300                         )
 301                 );
 302
 303                 // Get number of results
 304                 $titleMatchesNum = $textMatchesNum = $numTitleMatches = $numTextMatches = 0;
 305                 if ( $titleMatches ) {
 306                         $titleMatchesNum = $titleMatches->numRows();
 307                         $numTitleMatches = $titleMatches->getTotalHits();
 308                 }
 309                 if ( $textMatches ) {
 310                         $textMatchesNum = $textMatches->numRows();
 311                         $numTextMatches = $textMatches->getTotalHits();
 312                 }
 313                 $num = $titleMatchesNum + $textMatchesNum;
 314                 $totalRes = $numTitleMatches + $numTextMatches;
 315
 316                 $out->addHtml(
 317                         # This is an awful awful ID name. It's not a table, but we
 318                         # named it poorly from when this was a table so now we're
 319                         # stuck with it
 320                         Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
 321                         $this->shortDialog( $term, $num, $totalRes ) .
 322                         Xml::closeElement( 'div' ) .
 323                         $this->searchProfileTabs( $term ) .
 324                         $this->searchOptions( $term ) .
 325                         Xml::closeElement( 'form' ) .
 326                         $didYouMeanHtml
 327                 );
 328
 329                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 330                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 331                         // Empty query -- straight view of search form
 332                         return;
 333                 }
 334
 335                 $out->addHtml( "<div class='searchresults'>" );
 336
 337                 // prev/next links
 338                 $prevnext = null;
 339                 if ( $num || $this->offset ) {
 340                         // Show the create link ahead
 341                         $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 342                         if ( $totalRes > $this->limit || $this->offset ) {
 343                                 if ( $this->searchEngineType !== null ) {
 344                                         $this->setExtraParam( 'srbackend', $this->searchEngineType );
 345                                 }
 346                                 $prevnext = $this->getLanguage()->viewPrevNext(
 347                                         $this->getPageTitle(),
 348                                         $this->offset,
 349                                         $this->limit,
 350                                         $this->powerSearchOptions() + array( 'search' => $term ),
 351                                         $this->limit + $this->offset >= $totalRes
 352                                 );
 353                         }
 354                 }
 355                 Hooks::run( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 356
 357                 $out->parserOptions()->setEditSection( false );
 358                 if ( $titleMatches ) {
 359                         if ( $numTitleMatches > 0 ) {
 360                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 361                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 362                         }
 363                         $titleMatches->free();
 364                 }
 365                 if ( $textMatches && !$textStatus ) {
 366                         // output appropriate heading
 367                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 368                                 // if no title matches the heading is redundant
 369                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 370                         }
 371
 372                         // show interwiki results if any
 373                         if ( $textMatches->hasInterwikiResults() ) {
 374                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 375                         }
 376                         // show results
 377                         if ( $numTextMatches > 0 ) {
 378                                 $out->addHTML( $this->showMatches( $textMatches ) );
 379                         }
 380
 381                         $textMatches->free();
 382                 }
 383                 if ( $num === 0 ) {
 384                         if ( $textStatus ) {
 385                                 $out->addHTML( '<div class="error">' .
 386                                         $textStatus->getMessage( 'search-error' ) . '</div>' );
 387                         } else {
 388                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 389                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 390                                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 391                         }
 392                 }
 393                 $out->addHtml( "</div>" );
 394
 395                 if ( $prevnext ) {
 396                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 397                 }
 398
 399                 Hooks::run( 'SpecialSearchResultsAppend', array( $this, $out ) );
 400
 401         }
 402
 403         /**
 404          * Decide if the suggested query should be run, and it's results returned
 405          * instead of the provided $textMatches
 406          *
 407          * @param SearchResultSet $textMatches The results of a users query
 408          * @return bool
 409          */
 410         protected function shouldRunSuggestedQuery( SearchResultSet $textMatches ) {
 411                 if ( !$this->runSuggestion ||
 412                         !$textMatches->hasSuggestion() ||
 413                         $textMatches->numRows() > 0 ||
 414                         $textMatches->searchContainedSyntax()
 415                 ) {
 416                         return false;
 417                 }
 418
 419                 // Generate a random number between 0 and 1. If the
 420                 // number is less than the desired percentages run it.
 421                 $rand = rand( 0, getrandmax() ) / getrandmax();
 422                 return $this->getConfig()->get( 'SearchRunSuggestedQueryPercent' ) > $rand;
 423         }
 424
 425         /**
 426          * Generates HTML shown to the user when we have a suggestion about a query
 427          * that might give more results than their current query.
 428          */
 429         protected function getDidYouMeanHtml( SearchResultSet $textMatches ) {
 430                 # mirror Go/Search behavior of original request ..
 431                 $params = array( 'search' => $textMatches->getSuggestionQuery() );
 432                 if ( $this->fulltext != null ) {
 433                         $params['fulltext'] = $this->fulltext;
 434                 }
 435                 $stParams = array_merge( $params, $this->powerSearchOptions() );
 436
 437                 $suggest = Linker::linkKnown(
 438                         $this->getPageTitle(),
 439                         $textMatches->getSuggestionSnippet() ?: null,
 440                         array(),
 441                         $stParams
 442                 );
 443
 444                 # html of did you mean... search suggestion link
 445                 return Html::rawElement(
 446                         'div',
 447                         array( 'class' => 'searchdidyoumean' ),
 448                         $this->msg( 'search-suggest' )->rawParams( $suggest )->parse()
 449                 );
 450         }
 451
 452         /**
 453          * Generates HTML shown to user when their query has been internally rewritten,
 454          * and the results of the rewritten query are being returned.
 455          *
 456          * @param string $term The users search input
 457          * @param SearchResultSet $textMatches The response to the users initial search request
 458          * @return string HTML linking the user to their original $term query, and the one
 459          *  suggested by $textMatches.
 460          */
 461         protected function getDidYouMeanRewrittenHtml( $term, SearchResultSet $textMatches ) {
 462                 // Showing results for '$rewritten'
 463                 // Search instead for '$orig'
 464
 465                 $params = array( 'search' => $textMatches->getSuggestionQuery() );
 466                 if ( $this->fulltext != null ) {
 467                         $params['fulltext'] = $this->fulltext;
 468                 }
 469                 $stParams = array_merge( $params, $this->powerSearchOptions() );
 470
 471                 $rewritten = Linker::linkKnown(
 472                         $this->getPageTitle(),
 473                         $textMatches->getSuggestionSnippet() ?: null,
 474                         array(),
 475                         $stParams
 476                 );
 477
 478                 $stParams['search'] = $term;
 479                 $stParams['runsuggestion'] = 0;
 480                 $original = Linker::linkKnown(
 481                         $this->getPageTitle(),
 482                         htmlspecialchars( $term ),
 483                         array(),
 484                         $stParams
 485                 );
 486
 487                 return Html::rawElement(
 488                         'div',
 489                         array( 'class' => 'searchdidyoumean' ),
 490                         $this->msg( 'search-rewritten')->rawParams( $rewritten, $original )->escaped()
 491                 );
 492         }
 493
 494         /**
 495          * @param Title $title
 496          * @param int $num The number of search results found
 497          * @param null|SearchResultSet $titleMatches Results from title search
 498          * @param null|SearchResultSet $textMatches Results from text search
 499          */
 500         protected function showCreateLink( $title, $num, $titleMatches, $textMatches ) {
 501                 // show direct page/create link if applicable
 502
 503                 // Check DBkey !== '' in case of fragment link only.
 504                 if ( is_null( $title ) || $title->getDBkey() === ''
 505                         || ( $titleMatches !== null && $titleMatches->searchContainedSyntax() )
 506                         || ( $textMatches !== null && $textMatches->searchContainedSyntax() )
 507                 ) {
 508                         // invalid title
 509                         // preserve the paragraph for margins etc...
 510                         $this->getOutput()->addHtml( '<p></p>' );
 511
 512                         return;
 513                 }
 514
 515                 $messageName = 'searchmenu-new-nocreate';
 516                 $linkClass = 'mw-search-createlink';
 517
 518                 if ( !$title->isExternal() ) {
 519                         if ( $title->isKnown() ) {
 520                                 $messageName = 'searchmenu-exists';
 521                                 $linkClass = 'mw-search-exists';
 522                         } elseif ( $title->quickUserCan( 'create', $this->getUser() ) ) {
 523                                 $messageName = 'searchmenu-new';
 524                         }
 525                 }
 526
 527                 $params = array(
 528                         $messageName,
 529                         wfEscapeWikiText( $title->getPrefixedText() ),
 530                         Message::numParam( $num )
 531                 );
 532                 Hooks::run( 'SpecialSearchCreateLink', array( $title, &$params ) );
 533
 534                 // Extensions using the hook might still return an empty $messageName
 535                 if ( $messageName ) {
 536                         $this->getOutput()->wrapWikiMsg( "<p class=\"$linkClass\">\n$1</p>", $params );
 537                 } else {
 538                         // preserve the paragraph for margins etc...
 539                         $this->getOutput()->addHtml( '<p></p>' );
 540                 }
 541         }
 542
 543         /**
 544          * @param string $term
 545          */
 546         protected function setupPage( $term ) {
 547                 $out = $this->getOutput();
 548                 if ( strval( $term ) !== '' ) {
 549                         $out->setPageTitle( $this->msg( 'searchresults' ) );
 550                         $out->setHTMLTitle( $this->msg( 'pagetitle' )
 551                                 ->rawParams( $this->msg( 'searchresults-title' )->rawParams( $term )->text() )
 552                                 ->inContentLanguage()->text()
 553                         );
 554                 }
 555                 // add javascript specific to special:search
 556                 $out->addModules( 'mediawiki.special.search' );
 557         }
 558
 559         /**
 560          * Return true if current search is a power (advanced) search
 561          *
 562          * @return bool
 563          */
 564         protected function isPowerSearch() {
 565                 return $this->profile === 'advanced';
 566         }
 567
 568         /**
 569          * Extract "power search" namespace settings from the request object,
 570          * returning a list of index numbers to search.
 571          *
 572          * @param WebRequest $request
 573          * @return array
 574          */
 575         protected function powerSearch( &$request ) {
 576                 $arr = array();
 577                 foreach ( SearchEngine::searchableNamespaces() as $ns => $name ) {
 578                         if ( $request->getCheck( 'ns' . $ns ) ) {
 579                                 $arr[] = $ns;
 580                         }
 581                 }
 582
 583                 return $arr;
 584         }
 585
 586         /**
 587          * Reconstruct the 'power search' options for links
 588          *
 589          * @return array
 590          */
 591         protected function powerSearchOptions() {
 592                 $opt = array();
 593                 if ( !$this->isPowerSearch() ) {
 594                         $opt['profile'] = $this->profile;
 595                 } else {
 596                         foreach ( $this->namespaces as $n ) {
 597                                 $opt['ns' . $n] = 1;
 598                         }
 599                 }
 600
 601                 return $opt + $this->extraParams;
 602         }
 603
 604         /**
 605          * Save namespace preferences when we're supposed to
 606          *
 607          * @return bool Whether we wrote something
 608          */
 609         protected function saveNamespaces() {
 610                 $user = $this->getUser();
 611                 $request = $this->getRequest();
 612
 613                 if ( $user->isLoggedIn() &&
 614                         $user->matchEditToken(
 615                                 $request->getVal( 'nsRemember' ),
 616                                 'searchnamespace',
 617                                 $request
 618                         ) && !wfReadOnly()
 619                 ) {
 620                         // Reset namespace preferences: namespaces are not searched
 621                         // when they're not mentioned in the URL parameters.
 622                         foreach ( MWNamespace::getValidNamespaces() as $n ) {
 623                                 $user->setOption( 'searchNs' . $n, false );
 624                         }
 625                         // The request parameters include all the namespaces to be searched.
 626                         // Even if they're the same as an existing profile, they're not eaten.
 627                         foreach ( $this->namespaces as $n ) {
 628                                 $user->setOption( 'searchNs' . $n, true );
 629                         }
 630
 631                         $user->saveSettings();
 632                         return true;
 633                 }
 634
 635                 return false;
 636         }
 637
 638         /**
 639          * Show whole set of results
 640          *
 641          * @param SearchResultSet $matches
 642          *
 643          * @return string
 644          */
 645         protected function showMatches( &$matches ) {
 646                 global $wgContLang;
 647
 648                 $terms = $wgContLang->convertForSearchResult( $matches->termMatches() );
 649
 650                 $out = "<ul class='mw-search-results'>\n";
 651                 $result = $matches->next();
 652                 while ( $result ) {
 653                         $out .= $this->showHit( $result, $terms );
 654                         $result = $matches->next();
 655                 }
 656                 $out .= "</ul>\n";
 657
 658                 // convert the whole thing to desired language variant
 659                 $out = $wgContLang->convert( $out );
 660
 661                 return $out;
 662         }
 663
 664         /**
 665          * Format a single hit result
 666          *
 667          * @param SearchResult $result
 668          * @param array $terms Terms to highlight
 669          *
 670          * @return string
 671          */
 672         protected function showHit( $result, $terms ) {
 673
 674                 if ( $result->isBrokenTitle() ) {
 675                         return '';
 676                 }
 677
 678                 $title = $result->getTitle();
 679
 680                 $titleSnippet = $result->getTitleSnippet();
 681
 682                 if ( $titleSnippet == '' ) {
 683                         $titleSnippet = null;
 684                 }
 685
 686                 $link_t = clone $title;
 687
 688                 Hooks::run( 'ShowSearchHitTitle',
 689                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 690
 691                 $link = Linker::linkKnown(
 692                         $link_t,
 693                         $titleSnippet
 694                 );
 695
 696                 //If page content is not readable, just return the title.
 697                 //This is not quite safe, but better than showing excerpts from non-readable pages
 698                 //Note that hiding the entry entirely would screw up paging.
 699                 if ( !$title->userCan( 'read', $this->getUser() ) ) {
 700                         return "<li>{$link}</li>\n";
 701                 }
 702
 703                 // If the page doesn't *exist*... our search index is out of date.
 704                 // The least confusing at this point is to drop the result.
 705                 // You may get less results, but... oh well. :P
 706                 if ( $result->isMissingRevision() ) {
 707                         return '';
 708                 }
 709
 710                 // format redirects / relevant sections
 711                 $redirectTitle = $result->getRedirectTitle();
 712                 $redirectText = $result->getRedirectSnippet();
 713                 $sectionTitle = $result->getSectionTitle();
 714                 $sectionText = $result->getSectionSnippet();
 715                 $categorySnippet = $result->getCategorySnippet();
 716
 717                 $redirect = '';
 718                 if ( !is_null( $redirectTitle ) ) {
 719                         if ( $redirectText == '' ) {
 720                                 $redirectText = null;
 721                         }
 722
 723                         $redirect = "<span class='searchalttitle'>" .
 724                                 $this->msg( 'search-redirect' )->rawParams(
 725                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 726                                 "</span>";
 727                 }
 728
 729                 $section = '';
 730                 if ( !is_null( $sectionTitle ) ) {
 731                         if ( $sectionText == '' ) {
 732                                 $sectionText = null;
 733                         }
 734
 735                         $section = "<span class='searchalttitle'>" .
 736                                 $this->msg( 'search-section' )->rawParams(
 737                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 738                                 "</span>";
 739                 }
 740
 741                 $category = '';
 742                 if ( $categorySnippet ) {
 743                         $category = "<span class='searchalttitle'>" .
 744                                 $this->msg( 'search-category' )->rawParams( $categorySnippet )->text() .
 745                                 "</span>";
 746                 }
 747
 748                 // format text extract
 749                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 750
 751                 $lang = $this->getLanguage();
 752
 753                 // format description
 754                 $byteSize = $result->getByteSize();
 755                 $wordCount = $result->getWordCount();
 756                 $timestamp = $result->getTimestamp();
 757                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 758                         ->numParams( $wordCount )->escaped();
 759
 760                 if ( $title->getNamespace() == NS_CATEGORY ) {
 761                         $cat = Category::newFromTitle( $title );
 762                         $size = $this->msg( 'search-result-category-size' )
 763                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 764                                 ->escaped();
 765                 }
 766
 767                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 768
 769                 $fileMatch = '';
 770                 // Include a thumbnail for media files...
 771                 if ( $title->getNamespace() == NS_FILE ) {
 772                         $img = $result->getFile();
 773                         $img = $img ?: wfFindFile( $title );
 774                         if ( $result->isFileMatch() ) {
 775                                 $fileMatch = "<span class='searchalttitle'>" .
 776                                         $this->msg( 'search-file-match' )->escaped() . "</span>";
 777                         }
 778                         if ( $img ) {
 779                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 780                                 if ( $thumb ) {
 781                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 782                                         // Float doesn't seem to interact well with the bullets.
 783                                         // Table messes up vertical alignment of the bullets.
 784                                         // Bullets are therefore disabled (didn't look great anyway).
 785                                         return "<li>" .
 786                                                 '<table class="searchResultImage">' .
 787                                                 '<tr>' .
 788                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 789                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 790                                                 '</td>' .
 791                                                 '<td style="vertical-align: top;">' .
 792                                                 "{$link} {$redirect} {$category} {$section} {$fileMatch}" .
 793                                                 $extract .
 794                                                 "<div class='mw-search-result-data'>{$desc} - {$date}</div>" .
 795                                                 '</td>' .
 796                                                 '</tr>' .
 797                                                 '</table>' .
 798                                                 "</li>\n";
 799                                 }
 800                         }
 801                 }
 802
 803                 $html = null;
 804
 805                 $score = '';
 806                 if ( Hooks::run( 'ShowSearchHit', array(
 807                         $this, $result, $terms,
 808                         &$link, &$redirect, &$section, &$extract,
 809                         &$score, &$size, &$date, &$related,
 810                         &$html
 811                 ) ) ) {
 812                         $html = "<li><div class='mw-search-result-heading'>" .
 813                                 "{$link} {$redirect} {$category} {$section} {$fileMatch}</div> {$extract}\n" .
 814                                 "<div class='mw-search-result-data'>{$size} - {$date}</div>" .
 815                                 "</li>\n";
 816                 }
 817
 818                 return $html;
 819         }
 820
 821         /**
 822          * Show results from other wikis
 823          *
 824          * @param SearchResultSet|array $matches
 825          * @param string $query
 826          *
 827          * @return string
 828          */
 829         protected function showInterwiki( $matches, $query ) {
 830                 global $wgContLang;
 831
 832                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 833                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 834                 $out .= "<ul class='mw-search-iwresults'>\n";
 835
 836                 // work out custom project captions
 837                 $customCaptions = array();
 838                 // format per line <iwprefix>:<caption>
 839                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() );
 840                 foreach ( $customLines as $line ) {
 841                         $parts = explode( ":", $line, 2 );
 842                         if ( count( $parts ) == 2 ) { // validate line
 843                                 $customCaptions[$parts[0]] = $parts[1];
 844                         }
 845                 }
 846
 847                 if ( !is_array( $matches ) ) {
 848                         $matches = array( $matches );
 849                 }
 850
 851                 foreach ( $matches as $set ) {
 852                         $prev = null;
 853                         $result = $set->next();
 854                         while ( $result ) {
 855                                 $out .= $this->showInterwikiHit( $result, $prev, $query, $customCaptions );
 856                                 $prev = $result->getInterwikiPrefix();
 857                                 $result = $set->next();
 858                         }
 859                 }
 860
 861                 // @todo Should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 862                 $out .= "</ul></div>\n";
 863
 864                 // convert the whole thing to desired language variant
 865                 $out = $wgContLang->convert( $out );
 866
 867                 return $out;
 868         }
 869
 870         /**
 871          * Show single interwiki link
 872          *
 873          * @param SearchResult $result
 874          * @param string $lastInterwiki
 875          * @param string $query
 876          * @param array $customCaptions Interwiki prefix -> caption
 877          *
 878          * @return string
 879          */
 880         protected function showInterwikiHit( $result, $lastInterwiki, $query, $customCaptions ) {
 881
 882                 if ( $result->isBrokenTitle() ) {
 883                         return '';
 884                 }
 885
 886                 $title = $result->getTitle();
 887
 888                 $titleSnippet = $result->getTitleSnippet();
 889
 890                 if ( $titleSnippet == '' ) {
 891                         $titleSnippet = null;
 892                 }
 893
 894                 $link = Linker::linkKnown(
 895                         $title,
 896                         $titleSnippet
 897                 );
 898
 899                 // format redirect if any
 900                 $redirectTitle = $result->getRedirectTitle();
 901                 $redirectText = $result->getRedirectSnippet();
 902                 $redirect = '';
 903                 if ( !is_null( $redirectTitle ) ) {
 904                         if ( $redirectText == '' ) {
 905                                 $redirectText = null;
 906                         }
 907
 908                         $redirect = "<span class='searchalttitle'>" .
 909                                 $this->msg( 'search-redirect' )->rawParams(
 910                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 911                                 "</span>";
 912                 }
 913
 914                 $out = "";
 915                 // display project name
 916                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $title->getInterwiki() ) {
 917                         if ( array_key_exists( $title->getInterwiki(), $customCaptions ) ) {
 918                                 // captions from 'search-interwiki-custom'
 919                                 $caption = $customCaptions[$title->getInterwiki()];
 920                         } else {
 921                                 // default is to show the hostname of the other wiki which might suck
 922                                 // if there are many wikis on one hostname
 923                                 $parsed = wfParseUrl( $title->getFullURL() );
 924                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 925                         }
 926                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 927                         $searchTitle = Title::newFromText( $title->getInterwiki() . ":Special:Search" );
 928                         $searchLink = Linker::linkKnown(
 929                                 $searchTitle,
 930                                 $this->msg( 'search-interwiki-more' )->text(),
 931                                 array(),
 932                                 array(
 933                                         'search' => $query,
 934                                         'fulltext' => 'Search'
 935                                 )
 936                         );
 937                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 938                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 939                 }
 940
 941                 $out .= "<li>{$link} {$redirect}</li>\n";
 942
 943                 return $out;
 944         }
 945
 946         /**
 947          * Generates the power search box at [[Special:Search]]
 948          *
 949          * @param string $term Search term
 950          * @param array $opts
 951          * @return string HTML form
 952          */
 953         protected function powerSearchBox( $term, $opts ) {
 954                 global $wgContLang;
 955
 956                 // Groups namespaces into rows according to subject
 957                 $rows = array();
 958                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 959                         $subject = MWNamespace::getSubject( $namespace );
 960                         if ( !array_key_exists( $subject, $rows ) ) {
 961                                 $rows[$subject] = "";
 962                         }
 963
 964                         $name = $wgContLang->getConverter()->convertNamespace( $namespace );
 965                         if ( $name == '' ) {
 966                                 $name = $this->msg( 'blanknamespace' )->text();
 967                         }
 968
 969                         $rows[$subject] .=
 970                                 Xml::openElement( 'td' ) .
 971                                 Xml::checkLabel(
 972                                         $name,
 973                                         "ns{$namespace}",
 974                                         "mw-search-ns{$namespace}",
 975                                         in_array( $namespace, $this->namespaces )
 976                                 ) .
 977                                 Xml::closeElement( 'td' );
 978                 }
 979
 980                 $rows = array_values( $rows );
 981                 $numRows = count( $rows );
 982
 983                 // Lays out namespaces in multiple floating two-column tables so they'll
 984                 // be arranged nicely while still accommodating different screen widths
 985                 $namespaceTables = '';
 986                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 987                         $namespaceTables .= Xml::openElement( 'table' );
 988
 989                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 990                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 991                         }
 992
 993                         $namespaceTables .= Xml::closeElement( 'table' );
 994                 }
 995
 996                 $showSections = array( 'namespaceTables' => $namespaceTables );
 997
 998                 Hooks::run( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
 999
1000                 $hidden = '';
1001                 foreach ( $opts as $key => $value ) {
1002                         $hidden .= Html::hidden( $key, $value );
1003                 }
1004
1005                 # Stuff to feed saveNamespaces()
1006                 $remember = '';
1007                 $user = $this->getUser();
1008                 if ( $user->isLoggedIn() ) {
1009                         $remember .= Xml::checkLabel(
1010                                 $this->msg( 'powersearch-remember' )->text(),
1011                                 'nsRemember',
1012                                 'mw-search-powersearch-remember',
1013                                 false,
1014                                 // The token goes here rather than in a hidden field so it
1015                                 // is only sent when necessary (not every form submission).
1016                                 array( 'value' => $user->getEditToken(
1017                                         'searchnamespace',
1018                                         $this->getRequest()
1019                                 ) )
1020                         );
1021                 }
1022
1023                 // Return final output
1024                 return Xml::openElement( 'fieldset', array( 'id' => 'mw-searchoptions' ) ) .
1025                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
1026                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
1027                         Xml::element( 'div', array( 'id' => 'mw-search-togglebox' ), '', false ) .
1028                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1029                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
1030                         $hidden .
1031                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1032                         $remember .
1033                         Xml::closeElement( 'fieldset' );
1034         }
1035
1036         /**
1037          * @return array
1038          */
1039         protected function getSearchProfiles() {
1040                 // Builds list of Search Types (profiles)
1041                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
1042
1043                 $profiles = array(
1044                         'default' => array(
1045                                 'message' => 'searchprofile-articles',
1046                                 'tooltip' => 'searchprofile-articles-tooltip',
1047                                 'namespaces' => SearchEngine::defaultNamespaces(),
1048                                 'namespace-messages' => SearchEngine::namespacesAsText(
1049                                         SearchEngine::defaultNamespaces()
1050                                 ),
1051                         ),
1052                         'images' => array(
1053                                 'message' => 'searchprofile-images',
1054                                 'tooltip' => 'searchprofile-images-tooltip',
1055                                 'namespaces' => array( NS_FILE ),
1056                         ),
1057                         'all' => array(
1058                                 'message' => 'searchprofile-everything',
1059                                 'tooltip' => 'searchprofile-everything-tooltip',
1060                                 'namespaces' => $nsAllSet,
1061                         ),
1062                         'advanced' => array(
1063                                 'message' => 'searchprofile-advanced',
1064                                 'tooltip' => 'searchprofile-advanced-tooltip',
1065                                 'namespaces' => self::NAMESPACES_CURRENT,
1066                         )
1067                 );
1068
1069                 Hooks::run( 'SpecialSearchProfiles', array( &$profiles ) );
1070
1071                 foreach ( $profiles as &$data ) {
1072                         if ( !is_array( $data['namespaces'] ) ) {
1073                                 continue;
1074                         }
1075                         sort( $data['namespaces'] );
1076                 }
1077
1078                 return $profiles;
1079         }
1080
1081         /**
1082          * @param string $term
1083          * @return string
1084          */
1085         protected function searchProfileTabs( $term ) {
1086                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-profile-tabs' ) );
1087
1088                 $bareterm = $term;
1089                 if ( $this->startsWithImage( $term ) ) {
1090                         // Deletes prefixes
1091                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1092                 }
1093
1094                 $profiles = $this->getSearchProfiles();
1095                 $lang = $this->getLanguage();
1096
1097                 // Outputs XML for Search Types
1098                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1099                 $out .= Xml::openElement( 'ul' );
1100                 foreach ( $profiles as $id => $profile ) {
1101                         if ( !isset( $profile['parameters'] ) ) {
1102                                 $profile['parameters'] = array();
1103                         }
1104                         $profile['parameters']['profile'] = $id;
1105
1106                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1107                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1108                         $out .= Xml::tags(
1109                                 'li',
1110                                 array(
1111                                         'class' => $this->profile === $id ? 'current' : 'normal'
1112                                 ),
1113                                 $this->makeSearchLink(
1114                                         $bareterm,
1115                                         array(),
1116                                         $this->msg( $profile['message'] )->text(),
1117                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1118                                         $profile['parameters']
1119                                 )
1120                         );
1121                 }
1122                 $out .= Xml::closeElement( 'ul' );
1123                 $out .= Xml::closeElement( 'div' );
1124                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1125                 $out .= Xml::closeElement( 'div' );
1126
1127                 return $out;
1128         }
1129
1130         /**
1131          * @param string $term Search term
1132          * @return string
1133          */
1134         protected function searchOptions( $term ) {
1135                 $out = '';
1136                 $opts = array();
1137                 $opts['profile'] = $this->profile;
1138
1139                 if ( $this->isPowerSearch() ) {
1140                         $out .= $this->powerSearchBox( $term, $opts );
1141                 } else {
1142                         $form = '';
1143                         Hooks::run( 'SpecialSearchProfileForm', array( $this, &$form, $this->profile, $term, $opts ) );
1144                         $out .= $form;
1145                 }
1146
1147                 return $out;
1148         }
1149
1150         /**
1151          * @param string $term
1152          * @param int $resultsShown
1153          * @param int $totalNum
1154          * @return string
1155          */
1156         protected function shortDialog( $term, $resultsShown, $totalNum ) {
1157                 $out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
1158                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1159                 // Term box
1160                 $out .= Html::input( 'search', $term, 'search', array(
1161                         'id' => $this->isPowerSearch() ? 'powerSearchText' : 'searchText',
1162                         'size' => '50',
1163                         'autofocus' => trim( $term ) === '',
1164                         'class' => 'mw-ui-input mw-ui-input-inline',
1165                 ) ) . "\n";
1166                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1167                 $out .= Html::submitButton(
1168                         $this->msg( 'searchbutton' )->text(),
1169                         array( 'class' => 'mw-ui-button mw-ui-progressive' ),
1170                         array( 'mw-ui-progressive' )
1171                 ) . "\n";
1172
1173                 // Results-info
1174                 if ( $totalNum > 0 && $this->offset < $totalNum ) {
1175                         $top = $this->msg( 'search-showingresults' )
1176                                 ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1177                                 ->numParams( $resultsShown )
1178                                 ->parse();
1179                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ), $top ) .
1180                                 Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1181                 }
1182
1183                 return $out;
1184         }
1185
1186         /**
1187          * Make a search link with some target namespaces
1188          *
1189          * @param string $term
1190          * @param array $namespaces Ignored
1191          * @param string $label Link's text
1192          * @param string $tooltip Link's tooltip
1193          * @param array $params Query string parameters
1194          * @return string HTML fragment
1195          */
1196         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1197                 $opt = $params;
1198                 foreach ( $namespaces as $n ) {
1199                         $opt['ns' . $n] = 1;
1200                 }
1201
1202                 $stParams = array_merge(
1203                         array(
1204                                 'search' => $term,
1205                                 'fulltext' => $this->msg( 'search' )->text()
1206                         ),
1207                         $opt
1208                 );
1209
1210                 return Xml::element(
1211                         'a',
1212                         array(
1213                                 'href' => $this->getPageTitle()->getLocalURL( $stParams ),
1214                                 'title' => $tooltip
1215                         ),
1216                         $label
1217                 );
1218         }
1219
1220         /**
1221          * Check if query starts with image: prefix
1222          *
1223          * @param string $term The string to check
1224          * @return bool
1225          */
1226         protected function startsWithImage( $term ) {
1227                 global $wgContLang;
1228
1229                 $parts = explode( ':', $term );
1230                 if ( count( $parts ) > 1 ) {
1231                         return $wgContLang->getNsIndex( $parts[0] ) == NS_FILE;
1232                 }
1233
1234                 return false;
1235         }
1236
1237         /**
1238          * Check if query starts with all: prefix
1239          *
1240          * @param string $term The string to check
1241          * @return bool
1242          */
1243         protected function startsWithAll( $term ) {
1244
1245                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1246
1247                 $parts = explode( ':', $term );
1248                 if ( count( $parts ) > 1 ) {
1249                         return $parts[0] == $allkeyword;
1250                 }
1251
1252                 return false;
1253         }
1254
1255         /**
1256          * @since 1.18
1257          *
1258          * @return SearchEngine
1259          */
1260         public function getSearchEngine() {
1261                 if ( $this->searchEngine === null ) {
1262                         $this->searchEngine = $this->searchEngineType ?
1263                                 SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
1264                 }
1265
1266                 return $this->searchEngine;
1267         }
1268
1269         /**
1270          * Current search profile.
1271          * @return null|string
1272          */
1273         function getProfile() {
1274                 return $this->profile;
1275         }
1276
1277         /**
1278          * Current namespaces.
1279          * @return array
1280          */
1281         function getNamespaces() {
1282                 return $this->namespaces;
1283         }
1284
1285         /**
1286          * Users of hook SpecialSearchSetupEngine can use this to
1287          * add more params to links to not lose selection when
1288          * user navigates search results.
1289          * @since 1.18
1290          *
1291          * @param string $key
1292          * @param mixed $value
1293          */
1294         public function setExtraParam( $key, $value ) {
1295                 $this->extraParams[$key] = $value;
1296         }
1297
1298         protected function getGroupName() {
1299                 return 'pages';
1300         }
1301 }