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                 $out->addJsConfigVars( array( 'searchTerm' => $search ) );
 119                 $this->searchEngineType = $request->getVal( 'srbackend' );
 120
 121                 if ( $request->getVal( 'fulltext' )
 122                         || !is_null( $request->getVal( 'offset' ) )
 123                 ) {
 124                         $this->showResults( $search );
 125                 } else {
 126                         $this->goResult( $search );
 127                 }
 128         }
 129
 130         /**
 131          * Set up basic search parameters from the request and user settings.
 132          *
 133          * @see tests/phpunit/includes/specials/SpecialSearchTest.php
 134          */
 135         public function load() {
 136                 $request = $this->getRequest();
 137                 list( $this->limit, $this->offset ) = $request->getLimitOffset( 20, '' );
 138                 $this->mPrefix = $request->getVal( 'prefix', '' );
 139
 140                 $user = $this->getUser();
 141
 142                 # Extract manually requested namespaces
 143                 $nslist = $this->powerSearch( $request );
 144                 if ( !count( $nslist ) ) {
 145                         # Fallback to user preference
 146                         $nslist = SearchEngine::userNamespaces( $user );
 147                 }
 148
 149                 $profile = null;
 150                 if ( !count( $nslist ) ) {
 151                         $profile = 'default';
 152                 }
 153
 154                 $profile = $request->getVal( 'profile', $profile );
 155                 $profiles = $this->getSearchProfiles();
 156                 if ( $profile === null ) {
 157                         // BC with old request format
 158                         $profile = 'advanced';
 159                         foreach ( $profiles as $key => $data ) {
 160                                 if ( $nslist === $data['namespaces'] && $key !== 'advanced' ) {
 161                                         $profile = $key;
 162                                 }
 163                         }
 164                         $this->namespaces = $nslist;
 165                 } elseif ( $profile === 'advanced' ) {
 166                         $this->namespaces = $nslist;
 167                 } else {
 168                         if ( isset( $profiles[$profile]['namespaces'] ) ) {
 169                                 $this->namespaces = $profiles[$profile]['namespaces'];
 170                         } else {
 171                                 // Unknown profile requested
 172                                 $profile = 'default';
 173                                 $this->namespaces = $profiles['default']['namespaces'];
 174                         }
 175                 }
 176
 177                 $this->fulltext = $request->getVal( 'fulltext' );
 178                 $this->runSuggestion = (bool)$request->getVal( 'runsuggestion', true );
 179                 $this->profile = $profile;
 180         }
 181
 182         /**
 183          * If an exact title match can be found, jump straight ahead to it.
 184          *
 185          * @param string $term
 186          */
 187         public function goResult( $term ) {
 188                 $this->setupPage( $term );
 189                 # Try to go to page as entered.
 190                 $title = Title::newFromText( $term );
 191                 # If the string cannot be used to create a title
 192                 if ( is_null( $title ) ) {
 193                         $this->showResults( $term );
 194
 195                         return;
 196                 }
 197                 # If there's an exact or very near match, jump right there.
 198                 $title = SearchEngine::getNearMatch( $term );
 199
 200                 if ( !is_null( $title ) ) {
 201                         $this->getOutput()->redirect( $title->getFullURL() );
 202
 203                         return;
 204                 }
 205                 # No match, generate an edit URL
 206                 $title = Title::newFromText( $term );
 207                 if ( !is_null( $title ) ) {
 208                         Hooks::run( 'SpecialSearchNogomatch', array( &$title ) );
 209                 }
 210                 $this->showResults( $term );
 211         }
 212
 213         /**
 214          * @param string $term
 215          */
 216         public function showResults( $term ) {
 217                 global $wgContLang;
 218
 219                 $search = $this->getSearchEngine();
 220                 $search->setFeatureData( 'rewrite', $this->runSuggestion );
 221                 $search->setLimitOffset( $this->limit, $this->offset );
 222                 $search->setNamespaces( $this->namespaces );
 223                 $search->prefix = $this->mPrefix;
 224                 $term = $search->transformSearchTerm( $term );
 225
 226                 Hooks::run( 'SpecialSearchSetupEngine', array( $this, $this->profile, $search ) );
 227
 228                 $this->setupPage( $term );
 229
 230                 $out = $this->getOutput();
 231
 232                 if ( $this->getConfig()->get( 'DisableTextSearch' ) ) {
 233                         $searchFowardUrl = $this->getConfig()->get( 'SearchForwardUrl' );
 234                         if ( $searchFowardUrl ) {
 235                                 $url = str_replace( '$1', urlencode( $term ), $searchFowardUrl );
 236                                 $out->redirect( $url );
 237                         } else {
 238                                 $out->addHTML(
 239                                         Xml::openElement( 'fieldset' ) .
 240                                         Xml::element( 'legend', null, $this->msg( 'search-external' )->text() ) .
 241                                         Xml::element(
 242                                                 'p',
 243                                                 array( 'class' => 'mw-searchdisabled' ),
 244                                                 $this->msg( 'searchdisabled' )->text()
 245                                         ) .
 246                                         $this->msg( 'googlesearch' )->rawParams(
 247                                                 htmlspecialchars( $term ),
 248                                                 'UTF-8',
 249                                                 $this->msg( 'searchbutton' )->escaped()
 250                                         )->text() .
 251                                         Xml::closeElement( 'fieldset' )
 252                                 );
 253                         }
 254
 255                         return;
 256                 }
 257
 258                 $title = Title::newFromText( $term );
 259                 $showSuggestion = $title === null || !$title->isKnown();
 260                 $search->setShowSuggestion( $showSuggestion );
 261
 262                 // fetch search results
 263                 $rewritten = $search->replacePrefixes( $term );
 264
 265                 $titleMatches = $search->searchTitle( $rewritten );
 266                 $textMatches = $search->searchText( $rewritten );
 267
 268                 $textStatus = null;
 269                 if ( $textMatches instanceof Status ) {
 270                         $textStatus = $textMatches;
 271                         $textMatches = null;
 272                 }
 273
 274                 // did you mean... suggestions
 275                 $didYouMeanHtml = '';
 276                 if ( $showSuggestion && $textMatches && !$textStatus ) {
 277                         if ( $textMatches->hasRewrittenQuery() ) {
 278                                 $didYouMeanHtml = $this->getDidYouMeanRewrittenHtml( $term, $textMatches );
 279                         } elseif ( $textMatches->hasSuggestion() ) {
 280                                 $didYouMeanHtml = $this->getDidYouMeanHtml( $textMatches );
 281                         }
 282                 }
 283
 284                 if ( !Hooks::run( 'SpecialSearchResultsPrepend', array( $this, $out, $term ) ) ) {
 285                         # Hook requested termination
 286                         return;
 287                 }
 288
 289                 // start rendering the page
 290                 $out->addHtml(
 291                         Xml::openElement(
 292                                 'form',
 293                                 array(
 294                                         'id' => ( $this->isPowerSearch() ? 'powersearch' : 'search' ),
 295                                         'method' => 'get',
 296                                         'action' => wfScript(),
 297                                 )
 298                         )
 299                 );
 300
 301                 // Get number of results
 302                 $titleMatchesNum = $textMatchesNum = $numTitleMatches = $numTextMatches = 0;
 303                 if ( $titleMatches ) {
 304                         $titleMatchesNum = $titleMatches->numRows();
 305                         $numTitleMatches = $titleMatches->getTotalHits();
 306                 }
 307                 if ( $textMatches ) {
 308                         $textMatchesNum = $textMatches->numRows();
 309                         $numTextMatches = $textMatches->getTotalHits();
 310                 }
 311                 $num = $titleMatchesNum + $textMatchesNum;
 312                 $totalRes = $numTitleMatches + $numTextMatches;
 313
 314                 $out->addHtml(
 315                         # This is an awful awful ID name. It's not a table, but we
 316                         # named it poorly from when this was a table so now we're
 317                         # stuck with it
 318                         Xml::openElement( 'div', array( 'id' => 'mw-search-top-table' ) ) .
 319                         $this->shortDialog( $term, $num, $totalRes ) .
 320                         Xml::closeElement( 'div' ) .
 321                         $this->searchProfileTabs( $term ) .
 322                         $this->searchOptions( $term ) .
 323                         Xml::closeElement( 'form' ) .
 324                         $didYouMeanHtml
 325                 );
 326
 327                 $filePrefix = $wgContLang->getFormattedNsText( NS_FILE ) . ':';
 328                 if ( trim( $term ) === '' || $filePrefix === trim( $term ) ) {
 329                         // Empty query -- straight view of search form
 330                         return;
 331                 }
 332
 333                 $out->addHtml( "<div class='searchresults'>" );
 334
 335                 // prev/next links
 336                 $prevnext = null;
 337                 if ( $num || $this->offset ) {
 338                         // Show the create link ahead
 339                         $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 340                         if ( $totalRes > $this->limit || $this->offset ) {
 341                                 if ( $this->searchEngineType !== null ) {
 342                                         $this->setExtraParam( 'srbackend', $this->searchEngineType );
 343                                 }
 344                                 $prevnext = $this->getLanguage()->viewPrevNext(
 345                                         $this->getPageTitle(),
 346                                         $this->offset,
 347                                         $this->limit,
 348                                         $this->powerSearchOptions() + array( 'search' => $term ),
 349                                         $this->limit + $this->offset >= $totalRes
 350                                 );
 351                         }
 352                 }
 353                 Hooks::run( 'SpecialSearchResults', array( $term, &$titleMatches, &$textMatches ) );
 354
 355                 $out->parserOptions()->setEditSection( false );
 356                 if ( $titleMatches ) {
 357                         if ( $numTitleMatches > 0 ) {
 358                                 $out->wrapWikiMsg( "==$1==\n", 'titlematches' );
 359                                 $out->addHTML( $this->showMatches( $titleMatches ) );
 360                         }
 361                         $titleMatches->free();
 362                 }
 363                 if ( $textMatches && !$textStatus ) {
 364                         // output appropriate heading
 365                         if ( $numTextMatches > 0 && $numTitleMatches > 0 ) {
 366                                 // if no title matches the heading is redundant
 367                                 $out->wrapWikiMsg( "==$1==\n", 'textmatches' );
 368                         }
 369
 370                         // show results
 371                         if ( $numTextMatches > 0 ) {
 372                                 $out->addHTML( $this->showMatches( $textMatches ) );
 373                         }
 374                         // show interwiki results if any
 375                         if ( $textMatches->hasInterwikiResults() ) {
 376                                 $out->addHTML( $this->showInterwiki( $textMatches->getInterwikiResults(), $term ) );
 377                         }
 378
 379                         $textMatches->free();
 380                 }
 381                 if ( $num === 0 ) {
 382                         if ( $textStatus ) {
 383                                 $out->addHTML( '<div class="error">' .
 384                                         $textStatus->getMessage( 'search-error' ) . '</div>' );
 385                         } else {
 386                                 $out->wrapWikiMsg( "<p class=\"mw-search-nonefound\">\n$1</p>",
 387                                         array( 'search-nonefound', wfEscapeWikiText( $term ) ) );
 388                                 $this->showCreateLink( $title, $num, $titleMatches, $textMatches );
 389                         }
 390                 }
 391
 392                 $out->addHTML( '<div class="visualClear"></div>' );
 393                 if ( $prevnext ) {
 394                         $out->addHTML( "<p class='mw-search-pager-bottom'>{$prevnext}</p>\n" );
 395                 }
 396
 397                 $out->addHtml( "</div>" );
 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->getQueryAfterRewrite() );
 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->getQueryAfterRewriteSnippet() ?: 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                 $pos = $this->offset;
 653                 while ( $result ) {
 654                         $out .= $this->showHit( $result, $terms, ++$pos );
 655                         $result = $matches->next();
 656                 }
 657                 $out .= "</ul>\n";
 658
 659                 // convert the whole thing to desired language variant
 660                 $out = $wgContLang->convert( $out );
 661
 662                 return $out;
 663         }
 664
 665         /**
 666          * Format a single hit result
 667          *
 668          * @param SearchResult $result
 669          * @param array $terms Terms to highlight
 670          * @param int $position Position within the search results, including offset.
 671          *
 672          * @return string
 673          */
 674         protected function showHit( $result, $terms, $position ) {
 675
 676                 if ( $result->isBrokenTitle() ) {
 677                         return '';
 678                 }
 679
 680                 $title = $result->getTitle();
 681
 682                 $titleSnippet = $result->getTitleSnippet();
 683
 684                 if ( $titleSnippet == '' ) {
 685                         $titleSnippet = null;
 686                 }
 687
 688                 $link_t = clone $title;
 689
 690                 Hooks::run( 'ShowSearchHitTitle',
 691                         array( &$link_t, &$titleSnippet, $result, $terms, $this ) );
 692
 693                 $link = Linker::linkKnown(
 694                         $link_t,
 695                         $titleSnippet,
 696                         array( 'data-serp-pos' => $position ) // HTML attributes
 697                 );
 698
 699                 //If page content is not readable, just return the title.
 700                 //This is not quite safe, but better than showing excerpts from non-readable pages
 701                 //Note that hiding the entry entirely would screw up paging.
 702                 if ( !$title->userCan( 'read', $this->getUser() ) ) {
 703                         return "<li>{$link}</li>\n";
 704                 }
 705
 706                 // If the page doesn't *exist*... our search index is out of date.
 707                 // The least confusing at this point is to drop the result.
 708                 // You may get less results, but... oh well. :P
 709                 if ( $result->isMissingRevision() ) {
 710                         return '';
 711                 }
 712
 713                 // format redirects / relevant sections
 714                 $redirectTitle = $result->getRedirectTitle();
 715                 $redirectText = $result->getRedirectSnippet();
 716                 $sectionTitle = $result->getSectionTitle();
 717                 $sectionText = $result->getSectionSnippet();
 718                 $categorySnippet = $result->getCategorySnippet();
 719
 720                 $redirect = '';
 721                 if ( !is_null( $redirectTitle ) ) {
 722                         if ( $redirectText == '' ) {
 723                                 $redirectText = null;
 724                         }
 725
 726                         $redirect = "<span class='searchalttitle'>" .
 727                                 $this->msg( 'search-redirect' )->rawParams(
 728                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 729                                 "</span>";
 730                 }
 731
 732                 $section = '';
 733                 if ( !is_null( $sectionTitle ) ) {
 734                         if ( $sectionText == '' ) {
 735                                 $sectionText = null;
 736                         }
 737
 738                         $section = "<span class='searchalttitle'>" .
 739                                 $this->msg( 'search-section' )->rawParams(
 740                                         Linker::linkKnown( $sectionTitle, $sectionText ) )->text() .
 741                                 "</span>";
 742                 }
 743
 744                 $category = '';
 745                 if ( $categorySnippet ) {
 746                         $category = "<span class='searchalttitle'>" .
 747                                 $this->msg( 'search-category' )->rawParams( $categorySnippet )->text() .
 748                                 "</span>";
 749                 }
 750
 751                 // format text extract
 752                 $extract = "<div class='searchresult'>" . $result->getTextSnippet( $terms ) . "</div>";
 753
 754                 $lang = $this->getLanguage();
 755
 756                 // format description
 757                 $byteSize = $result->getByteSize();
 758                 $wordCount = $result->getWordCount();
 759                 $timestamp = $result->getTimestamp();
 760                 $size = $this->msg( 'search-result-size', $lang->formatSize( $byteSize ) )
 761                         ->numParams( $wordCount )->escaped();
 762
 763                 if ( $title->getNamespace() == NS_CATEGORY ) {
 764                         $cat = Category::newFromTitle( $title );
 765                         $size = $this->msg( 'search-result-category-size' )
 766                                 ->numParams( $cat->getPageCount(), $cat->getSubcatCount(), $cat->getFileCount() )
 767                                 ->escaped();
 768                 }
 769
 770                 $date = $lang->userTimeAndDate( $timestamp, $this->getUser() );
 771
 772                 $fileMatch = '';
 773                 // Include a thumbnail for media files...
 774                 if ( $title->getNamespace() == NS_FILE ) {
 775                         $img = $result->getFile();
 776                         $img = $img ?: wfFindFile( $title );
 777                         if ( $result->isFileMatch() ) {
 778                                 $fileMatch = "<span class='searchalttitle'>" .
 779                                         $this->msg( 'search-file-match' )->escaped() . "</span>";
 780                         }
 781                         if ( $img ) {
 782                                 $thumb = $img->transform( array( 'width' => 120, 'height' => 120 ) );
 783                                 if ( $thumb ) {
 784                                         $desc = $this->msg( 'parentheses' )->rawParams( $img->getShortDesc() )->escaped();
 785                                         // Float doesn't seem to interact well with the bullets.
 786                                         // Table messes up vertical alignment of the bullets.
 787                                         // Bullets are therefore disabled (didn't look great anyway).
 788                                         return "<li>" .
 789                                                 '<table class="searchResultImage">' .
 790                                                 '<tr>' .
 791                                                 '<td style="width: 120px; text-align: center; vertical-align: top;">' .
 792                                                 $thumb->toHtml( array( 'desc-link' => true ) ) .
 793                                                 '</td>' .
 794                                                 '<td style="vertical-align: top;">' .
 795                                                 "{$link} {$redirect} {$category} {$section} {$fileMatch}" .
 796                                                 $extract .
 797                                                 "<div class='mw-search-result-data'>{$desc} - {$date}</div>" .
 798                                                 '</td>' .
 799                                                 '</tr>' .
 800                                                 '</table>' .
 801                                                 "</li>\n";
 802                                 }
 803                         }
 804                 }
 805
 806                 $html = null;
 807
 808                 $score = '';
 809                 if ( Hooks::run( 'ShowSearchHit', array(
 810                         $this, $result, $terms,
 811                         &$link, &$redirect, &$section, &$extract,
 812                         &$score, &$size, &$date, &$related,
 813                         &$html
 814                 ) ) ) {
 815                         $html = "<li><div class='mw-search-result-heading'>" .
 816                                 "{$link} {$redirect} {$category} {$section} {$fileMatch}</div> {$extract}\n" .
 817                                 "<div class='mw-search-result-data'>{$size} - {$date}</div>" .
 818                                 "</li>\n";
 819                 }
 820
 821                 return $html;
 822         }
 823
 824         /**
 825          * Show results from other wikis
 826          *
 827          * @param SearchResultSet|array $matches
 828          * @param string $query
 829          *
 830          * @return string
 831          */
 832         protected function showInterwiki( $matches, $query ) {
 833                 global $wgContLang;
 834
 835                 $out = "<div id='mw-search-interwiki'><div id='mw-search-interwiki-caption'>" .
 836                         $this->msg( 'search-interwiki-caption' )->text() . "</div>\n";
 837                 $out .= "<ul class='mw-search-iwresults'>\n";
 838
 839                 // work out custom project captions
 840                 $customCaptions = array();
 841                 // format per line <iwprefix>:<caption>
 842                 $customLines = explode( "\n", $this->msg( 'search-interwiki-custom' )->text() );
 843                 foreach ( $customLines as $line ) {
 844                         $parts = explode( ":", $line, 2 );
 845                         if ( count( $parts ) == 2 ) { // validate line
 846                                 $customCaptions[$parts[0]] = $parts[1];
 847                         }
 848                 }
 849
 850                 if ( !is_array( $matches ) ) {
 851                         $matches = array( $matches );
 852                 }
 853
 854                 foreach ( $matches as $set ) {
 855                         $prev = null;
 856                         $result = $set->next();
 857                         while ( $result ) {
 858                                 $out .= $this->showInterwikiHit( $result, $prev, $query, $customCaptions );
 859                                 $prev = $result->getInterwikiPrefix();
 860                                 $result = $set->next();
 861                         }
 862                 }
 863
 864                 // @todo Should support paging in a non-confusing way (not sure how though, maybe via ajax)..
 865                 $out .= "</ul></div>\n";
 866
 867                 // convert the whole thing to desired language variant
 868                 $out = $wgContLang->convert( $out );
 869
 870                 return $out;
 871         }
 872
 873         /**
 874          * Show single interwiki link
 875          *
 876          * @param SearchResult $result
 877          * @param string $lastInterwiki
 878          * @param string $query
 879          * @param array $customCaptions Interwiki prefix -> caption
 880          *
 881          * @return string
 882          */
 883         protected function showInterwikiHit( $result, $lastInterwiki, $query, $customCaptions ) {
 884
 885                 if ( $result->isBrokenTitle() ) {
 886                         return '';
 887                 }
 888
 889                 $title = $result->getTitle();
 890
 891                 $titleSnippet = $result->getTitleSnippet();
 892
 893                 if ( $titleSnippet == '' ) {
 894                         $titleSnippet = null;
 895                 }
 896
 897                 $link = Linker::linkKnown(
 898                         $title,
 899                         $titleSnippet
 900                 );
 901
 902                 // format redirect if any
 903                 $redirectTitle = $result->getRedirectTitle();
 904                 $redirectText = $result->getRedirectSnippet();
 905                 $redirect = '';
 906                 if ( !is_null( $redirectTitle ) ) {
 907                         if ( $redirectText == '' ) {
 908                                 $redirectText = null;
 909                         }
 910
 911                         $redirect = "<span class='searchalttitle'>" .
 912                                 $this->msg( 'search-redirect' )->rawParams(
 913                                         Linker::linkKnown( $redirectTitle, $redirectText ) )->text() .
 914                                 "</span>";
 915                 }
 916
 917                 $out = "";
 918                 // display project name
 919                 if ( is_null( $lastInterwiki ) || $lastInterwiki != $title->getInterwiki() ) {
 920                         if ( array_key_exists( $title->getInterwiki(), $customCaptions ) ) {
 921                                 // captions from 'search-interwiki-custom'
 922                                 $caption = $customCaptions[$title->getInterwiki()];
 923                         } else {
 924                                 // default is to show the hostname of the other wiki which might suck
 925                                 // if there are many wikis on one hostname
 926                                 $parsed = wfParseUrl( $title->getFullURL() );
 927                                 $caption = $this->msg( 'search-interwiki-default', $parsed['host'] )->text();
 928                         }
 929                         // "more results" link (special page stuff could be localized, but we might not know target lang)
 930                         $searchTitle = Title::newFromText( $title->getInterwiki() . ":Special:Search" );
 931                         $searchLink = Linker::linkKnown(
 932                                 $searchTitle,
 933                                 $this->msg( 'search-interwiki-more' )->text(),
 934                                 array(),
 935                                 array(
 936                                         'search' => $query,
 937                                         'fulltext' => 'Search'
 938                                 )
 939                         );
 940                         $out .= "</ul><div class='mw-search-interwiki-project'><span class='mw-search-interwiki-more'>
 941                                 {$searchLink}</span>{$caption}</div>\n<ul>";
 942                 }
 943
 944                 $out .= "<li>{$link} {$redirect}</li>\n";
 945
 946                 return $out;
 947         }
 948
 949         /**
 950          * Generates the power search box at [[Special:Search]]
 951          *
 952          * @param string $term Search term
 953          * @param array $opts
 954          * @return string HTML form
 955          */
 956         protected function powerSearchBox( $term, $opts ) {
 957                 global $wgContLang;
 958
 959                 // Groups namespaces into rows according to subject
 960                 $rows = array();
 961                 foreach ( SearchEngine::searchableNamespaces() as $namespace => $name ) {
 962                         $subject = MWNamespace::getSubject( $namespace );
 963                         if ( !array_key_exists( $subject, $rows ) ) {
 964                                 $rows[$subject] = "";
 965                         }
 966
 967                         $name = $wgContLang->getConverter()->convertNamespace( $namespace );
 968                         if ( $name == '' ) {
 969                                 $name = $this->msg( 'blanknamespace' )->text();
 970                         }
 971
 972                         $rows[$subject] .=
 973                                 Xml::openElement( 'td' ) .
 974                                 Xml::checkLabel(
 975                                         $name,
 976                                         "ns{$namespace}",
 977                                         "mw-search-ns{$namespace}",
 978                                         in_array( $namespace, $this->namespaces )
 979                                 ) .
 980                                 Xml::closeElement( 'td' );
 981                 }
 982
 983                 $rows = array_values( $rows );
 984                 $numRows = count( $rows );
 985
 986                 // Lays out namespaces in multiple floating two-column tables so they'll
 987                 // be arranged nicely while still accommodating different screen widths
 988                 $namespaceTables = '';
 989                 for ( $i = 0; $i < $numRows; $i += 4 ) {
 990                         $namespaceTables .= Xml::openElement( 'table' );
 991
 992                         for ( $j = $i; $j < $i + 4 && $j < $numRows; $j++ ) {
 993                                 $namespaceTables .= Xml::tags( 'tr', null, $rows[$j] );
 994                         }
 995
 996                         $namespaceTables .= Xml::closeElement( 'table' );
 997                 }
 998
 999                 $showSections = array( 'namespaceTables' => $namespaceTables );
1000
1001                 Hooks::run( 'SpecialSearchPowerBox', array( &$showSections, $term, $opts ) );
1002
1003                 $hidden = '';
1004                 foreach ( $opts as $key => $value ) {
1005                         $hidden .= Html::hidden( $key, $value );
1006                 }
1007
1008                 # Stuff to feed saveNamespaces()
1009                 $remember = '';
1010                 $user = $this->getUser();
1011                 if ( $user->isLoggedIn() ) {
1012                         $remember .= Xml::checkLabel(
1013                                 $this->msg( 'powersearch-remember' )->text(),
1014                                 'nsRemember',
1015                                 'mw-search-powersearch-remember',
1016                                 false,
1017                                 // The token goes here rather than in a hidden field so it
1018                                 // is only sent when necessary (not every form submission).
1019                                 array( 'value' => $user->getEditToken(
1020                                         'searchnamespace',
1021                                         $this->getRequest()
1022                                 ) )
1023                         );
1024                 }
1025
1026                 // Return final output
1027                 return Xml::openElement( 'fieldset', array( 'id' => 'mw-searchoptions' ) ) .
1028                         Xml::element( 'legend', null, $this->msg( 'powersearch-legend' )->text() ) .
1029                         Xml::tags( 'h4', null, $this->msg( 'powersearch-ns' )->parse() ) .
1030                         Xml::element( 'div', array( 'id' => 'mw-search-togglebox' ), '', false ) .
1031                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1032                         implode( Xml::element( 'div', array( 'class' => 'divider' ), '', false ), $showSections ) .
1033                         $hidden .
1034                         Xml::element( 'div', array( 'class' => 'divider' ), '', false ) .
1035                         $remember .
1036                         Xml::closeElement( 'fieldset' );
1037         }
1038
1039         /**
1040          * @return array
1041          */
1042         protected function getSearchProfiles() {
1043                 // Builds list of Search Types (profiles)
1044                 $nsAllSet = array_keys( SearchEngine::searchableNamespaces() );
1045
1046                 $profiles = array(
1047                         'default' => array(
1048                                 'message' => 'searchprofile-articles',
1049                                 'tooltip' => 'searchprofile-articles-tooltip',
1050                                 'namespaces' => SearchEngine::defaultNamespaces(),
1051                                 'namespace-messages' => SearchEngine::namespacesAsText(
1052                                         SearchEngine::defaultNamespaces()
1053                                 ),
1054                         ),
1055                         'images' => array(
1056                                 'message' => 'searchprofile-images',
1057                                 'tooltip' => 'searchprofile-images-tooltip',
1058                                 'namespaces' => array( NS_FILE ),
1059                         ),
1060                         'all' => array(
1061                                 'message' => 'searchprofile-everything',
1062                                 'tooltip' => 'searchprofile-everything-tooltip',
1063                                 'namespaces' => $nsAllSet,
1064                         ),
1065                         'advanced' => array(
1066                                 'message' => 'searchprofile-advanced',
1067                                 'tooltip' => 'searchprofile-advanced-tooltip',
1068                                 'namespaces' => self::NAMESPACES_CURRENT,
1069                         )
1070                 );
1071
1072                 Hooks::run( 'SpecialSearchProfiles', array( &$profiles ) );
1073
1074                 foreach ( $profiles as &$data ) {
1075                         if ( !is_array( $data['namespaces'] ) ) {
1076                                 continue;
1077                         }
1078                         sort( $data['namespaces'] );
1079                 }
1080
1081                 return $profiles;
1082         }
1083
1084         /**
1085          * @param string $term
1086          * @return string
1087          */
1088         protected function searchProfileTabs( $term ) {
1089                 $out = Xml::openElement( 'div', array( 'class' => 'mw-search-profile-tabs' ) );
1090
1091                 $bareterm = $term;
1092                 if ( $this->startsWithImage( $term ) ) {
1093                         // Deletes prefixes
1094                         $bareterm = substr( $term, strpos( $term, ':' ) + 1 );
1095                 }
1096
1097                 $profiles = $this->getSearchProfiles();
1098                 $lang = $this->getLanguage();
1099
1100                 // Outputs XML for Search Types
1101                 $out .= Xml::openElement( 'div', array( 'class' => 'search-types' ) );
1102                 $out .= Xml::openElement( 'ul' );
1103                 foreach ( $profiles as $id => $profile ) {
1104                         if ( !isset( $profile['parameters'] ) ) {
1105                                 $profile['parameters'] = array();
1106                         }
1107                         $profile['parameters']['profile'] = $id;
1108
1109                         $tooltipParam = isset( $profile['namespace-messages'] ) ?
1110                                 $lang->commaList( $profile['namespace-messages'] ) : null;
1111                         $out .= Xml::tags(
1112                                 'li',
1113                                 array(
1114                                         'class' => $this->profile === $id ? 'current' : 'normal'
1115                                 ),
1116                                 $this->makeSearchLink(
1117                                         $bareterm,
1118                                         array(),
1119                                         $this->msg( $profile['message'] )->text(),
1120                                         $this->msg( $profile['tooltip'], $tooltipParam )->text(),
1121                                         $profile['parameters']
1122                                 )
1123                         );
1124                 }
1125                 $out .= Xml::closeElement( 'ul' );
1126                 $out .= Xml::closeElement( 'div' );
1127                 $out .= Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1128                 $out .= Xml::closeElement( 'div' );
1129
1130                 return $out;
1131         }
1132
1133         /**
1134          * @param string $term Search term
1135          * @return string
1136          */
1137         protected function searchOptions( $term ) {
1138                 $out = '';
1139                 $opts = array();
1140                 $opts['profile'] = $this->profile;
1141
1142                 if ( $this->isPowerSearch() ) {
1143                         $out .= $this->powerSearchBox( $term, $opts );
1144                 } else {
1145                         $form = '';
1146                         Hooks::run( 'SpecialSearchProfileForm', array( $this, &$form, $this->profile, $term, $opts ) );
1147                         $out .= $form;
1148                 }
1149
1150                 return $out;
1151         }
1152
1153         /**
1154          * @param string $term
1155          * @param int $resultsShown
1156          * @param int $totalNum
1157          * @return string
1158          */
1159         protected function shortDialog( $term, $resultsShown, $totalNum ) {
1160                 $out = Html::hidden( 'title', $this->getPageTitle()->getPrefixedText() );
1161                 $out .= Html::hidden( 'profile', $this->profile ) . "\n";
1162                 // Term box
1163                 $out .= Html::input( 'search', $term, 'search', array(
1164                         'id' => $this->isPowerSearch() ? 'powerSearchText' : 'searchText',
1165                         'size' => '50',
1166                         'autofocus' => trim( $term ) === '',
1167                         'class' => 'mw-ui-input mw-ui-input-inline',
1168                 ) ) . "\n";
1169                 $out .= Html::hidden( 'fulltext', 'Search' ) . "\n";
1170                 $out .= Html::submitButton(
1171                         $this->msg( 'searchbutton' )->text(),
1172                         array( 'class' => 'mw-ui-button mw-ui-progressive' ),
1173                         array( 'mw-ui-progressive' )
1174                 ) . "\n";
1175
1176                 // Results-info
1177                 if ( $totalNum > 0 && $this->offset < $totalNum ) {
1178                         $top = $this->msg( 'search-showingresults' )
1179                                 ->numParams( $this->offset + 1, $this->offset + $resultsShown, $totalNum )
1180                                 ->numParams( $resultsShown )
1181                                 ->parse();
1182                         $out .= Xml::tags( 'div', array( 'class' => 'results-info' ), $top ) .
1183                                 Xml::element( 'div', array( 'style' => 'clear:both' ), '', false );
1184                 }
1185
1186                 return $out;
1187         }
1188
1189         /**
1190          * Make a search link with some target namespaces
1191          *
1192          * @param string $term
1193          * @param array $namespaces Ignored
1194          * @param string $label Link's text
1195          * @param string $tooltip Link's tooltip
1196          * @param array $params Query string parameters
1197          * @return string HTML fragment
1198          */
1199         protected function makeSearchLink( $term, $namespaces, $label, $tooltip, $params = array() ) {
1200                 $opt = $params;
1201                 foreach ( $namespaces as $n ) {
1202                         $opt['ns' . $n] = 1;
1203                 }
1204
1205                 $stParams = array_merge(
1206                         array(
1207                                 'search' => $term,
1208                                 'fulltext' => $this->msg( 'search' )->text()
1209                         ),
1210                         $opt
1211                 );
1212
1213                 return Xml::element(
1214                         'a',
1215                         array(
1216                                 'href' => $this->getPageTitle()->getLocalURL( $stParams ),
1217                                 'title' => $tooltip
1218                         ),
1219                         $label
1220                 );
1221         }
1222
1223         /**
1224          * Check if query starts with image: prefix
1225          *
1226          * @param string $term The string to check
1227          * @return bool
1228          */
1229         protected function startsWithImage( $term ) {
1230                 global $wgContLang;
1231
1232                 $parts = explode( ':', $term );
1233                 if ( count( $parts ) > 1 ) {
1234                         return $wgContLang->getNsIndex( $parts[0] ) == NS_FILE;
1235                 }
1236
1237                 return false;
1238         }
1239
1240         /**
1241          * Check if query starts with all: prefix
1242          *
1243          * @param string $term The string to check
1244          * @return bool
1245          */
1246         protected function startsWithAll( $term ) {
1247
1248                 $allkeyword = $this->msg( 'searchall' )->inContentLanguage()->text();
1249
1250                 $parts = explode( ':', $term );
1251                 if ( count( $parts ) > 1 ) {
1252                         return $parts[0] == $allkeyword;
1253                 }
1254
1255                 return false;
1256         }
1257
1258         /**
1259          * @since 1.18
1260          *
1261          * @return SearchEngine
1262          */
1263         public function getSearchEngine() {
1264                 if ( $this->searchEngine === null ) {
1265                         $this->searchEngine = $this->searchEngineType ?
1266                                 SearchEngine::create( $this->searchEngineType ) : SearchEngine::create();
1267                 }
1268
1269                 return $this->searchEngine;
1270         }
1271
1272         /**
1273          * Current search profile.
1274          * @return null|string
1275          */
1276         function getProfile() {
1277                 return $this->profile;
1278         }
1279
1280         /**
1281          * Current namespaces.
1282          * @return array
1283          */
1284         function getNamespaces() {
1285                 return $this->namespaces;
1286         }
1287
1288         /**
1289          * Users of hook SpecialSearchSetupEngine can use this to
1290          * add more params to links to not lose selection when
1291          * user navigates search results.
1292          * @since 1.18
1293          *
1294          * @param string $key
1295          * @param mixed $value
1296          */
1297         public function setExtraParam( $key, $value ) {
1298                 $this->extraParams[$key] = $value;
1299         }
1300
1301         protected function getGroupName() {
1302                 return 'pages';
1303         }
1304 }