includes/SpecialPage.php

   1 <?php
   2 /**
   3  * SpecialPage: handling special pages and lists thereof.
   4  *
   5  * To add a special page in an extension, add to $wgSpecialPages either
   6  * an object instance or an array containing the name and constructor
   7  * parameters. The latter is preferred for performance reasons.
   8  *
   9  * The object instantiated must be either an instance of SpecialPage or a
  10  * sub-class thereof. It must have an execute() method, which sends the HTML
  11  * for the special page to $wgOut. The parent class has an execute() method
  12  * which distributes the call to the historical global functions. Additionally,
  13  * execute() also checks if the user has the necessary access privileges
  14  * and bails out if not.
  15  *
  16  * To add a core special page, use the similar static list in
  17  * SpecialPage::$mList. To remove a core static special page at runtime, use
  18  * a SpecialPage_initList hook.
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  * @defgroup SpecialPage SpecialPage
  23  */
  24
  25 /**
  26  * Parent special page class, also static functions for handling the special
  27  * page list.
  28  * @ingroup SpecialPage
  29  */
  30 class SpecialPage {
  31         /**#@+
  32          * @access private
  33          */
  34         /**
  35          * The canonical name of this special page
  36          * Also used for the default <h1> heading, @see getDescription()
  37          */
  38         var $mName;
  39         /**
  40          * The local name of this special page
  41          */
  42         var $mLocalName;
  43         /**
  44          * Minimum user level required to access this page, or "" for anyone.
  45          * Also used to categorise the pages in Special:Specialpages
  46          */
  47         var $mRestriction;
  48         /**
  49          * Listed in Special:Specialpages?
  50          */
  51         var $mListed;
  52         /**
  53          * Function name called by the default execute()
  54          */
  55         var $mFunction;
  56         /**
  57          * File which needs to be included before the function above can be called
  58          */
  59         var $mFile;
  60         /**
  61          * Whether or not this special page is being included from an article
  62          */
  63         var $mIncluding;
  64         /**
  65          * Whether the special page can be included in an article
  66          */
  67         var $mIncludable;
  68         /**
  69          * Query parameters that can be passed through redirects
  70          */
  71         var $mAllowedRedirectParams = array();
  72         /**
  73          * Query parameteres added by redirects
  74          */
  75         var $mAddedRedirectParams = array();
  76         /**
  77          * List of special pages, followed by parameters.
  78          * If the only parameter is a string, that is the page name.
  79          * Otherwise, it is an array. The format is one of:
  80          ** array( 'SpecialPage', name, right )
  81          ** array( 'IncludableSpecialPage', name, right, listed? )
  82          ** array( 'UnlistedSpecialPage', name, right )
  83          ** array( 'SpecialRedirectToSpecial', name, page to redirect to, special page param, ... )
  84          */
  85         static public $mList = array(
  86                 # Maintenance Reports
  87                 'BrokenRedirects'           => array( 'SpecialPage', 'BrokenRedirects' ),
  88                 'Deadendpages'              => array( 'SpecialPage', 'Deadendpages' ),
  89                 'DoubleRedirects'           => array( 'SpecialPage', 'DoubleRedirects' ),
  90                 'Longpages'                 => array( 'SpecialPage', 'Longpages' ),
  91                 'Ancientpages'              => array( 'SpecialPage', 'Ancientpages' ),
  92                 'Lonelypages'               => array( 'SpecialPage', 'Lonelypages' ),
  93                 'Fewestrevisions'           => array( 'SpecialPage', 'Fewestrevisions' ),
  94                 'Withoutinterwiki'          => array( 'SpecialPage', 'Withoutinterwiki' ),
  95                 'Protectedpages'            => 'SpecialProtectedpages',
  96                 'Protectedtitles'           => 'SpecialProtectedtitles',
  97                 'Shortpages'                => array( 'SpecialPage', 'Shortpages' ),
  98                 'Uncategorizedcategories'   => array( 'SpecialPage', 'Uncategorizedcategories' ),
  99                 'Uncategorizedimages'       => array( 'SpecialPage', 'Uncategorizedimages' ),
 100                 'Uncategorizedpages'        => array( 'SpecialPage', 'Uncategorizedpages' ),
 101                 'Uncategorizedtemplates'    => array( 'SpecialPage', 'Uncategorizedtemplates' ),
 102                 'Unusedcategories'          => array( 'SpecialPage', 'Unusedcategories' ),
 103                 'Unusedimages'              => array( 'SpecialPage', 'Unusedimages' ),
 104                 'Unusedtemplates'           => array( 'SpecialPage', 'Unusedtemplates' ),
 105                 'Unwatchedpages'            => array( 'SpecialPage', 'Unwatchedpages', 'unwatchedpages' ),
 106                 'Wantedcategories'          => array( 'SpecialPage', 'Wantedcategories' ),
 107                 'Wantedfiles'               => array( 'SpecialPage', 'Wantedfiles' ),
 108                 'Wantedpages'               => array( 'IncludableSpecialPage', 'Wantedpages' ),
 109                 'Wantedtemplates'           => array( 'SpecialPage', 'Wantedtemplates' ),
 110
 111                 # List of pages
 112                 'Allpages'                  => 'SpecialAllpages',
 113                 'Prefixindex'               => 'SpecialPrefixindex',
 114                 'Categories'                => 'SpecialCategories',
 115                 'Disambiguations'           => array( 'SpecialPage', 'Disambiguations' ),
 116                 'Listredirects'             => array( 'SpecialPage', 'Listredirects' ),
 117
 118                 # Login/create account
 119                 'Userlogin'                 => 'LoginForm',
 120                 'CreateAccount'             => array( 'SpecialRedirectToSpecial', 'CreateAccount', 'Userlogin', 'signup', array( 'uselang' ) ),
 121
 122                 # Users and rights
 123                 'Blockip'                   => 'IPBlockForm',
 124                 'Ipblocklist'               => 'IPUnblockForm',
 125                 'Unblock'                   => array( 'SpecialRedirectToSpecial', 'Unblock', 'Ipblocklist', false, array( 'uselang', 'ip', 'id' ), array( 'action' => 'unblock' ) ),
 126                 'Resetpass'                 => 'SpecialResetpass',
 127                 'DeletedContributions'      => 'DeletedContributionsPage',
 128                 'Preferences'               => 'SpecialPreferences',
 129                 'Contributions'             => 'SpecialContributions',
 130                 'Listgrouprights'           => 'SpecialListGroupRights',
 131                 'Listusers'                 => array( 'SpecialPage', 'Listusers' ),
 132                 'Listadmins'                => array( 'SpecialRedirectToSpecial', 'Listadmins', 'Listusers', 'sysop' ),
 133                 'Listbots'                  => array( 'SpecialRedirectToSpecial', 'Listbots', 'Listusers', 'bot' ),
 134                 'Activeusers'               => 'SpecialActiveUsers',
 135                 'Userrights'                => 'UserrightsPage',
 136                 'DisableAccount'            => 'SpecialDisableAccount',
 137
 138                 # Recent changes and logs
 139                 'Newimages'                 => array( 'IncludableSpecialPage', 'Newimages' ),
 140                 'Log'                       => 'SpecialLog',
 141                 'Watchlist'                 => array( 'SpecialPage', 'Watchlist' ),
 142                 'Newpages'                  => 'SpecialNewpages',
 143                 'Recentchanges'             => 'SpecialRecentchanges',
 144                 'Recentchangeslinked'       => 'SpecialRecentchangeslinked',
 145                 'Tags'                      => 'SpecialTags',
 146
 147                 # Media reports and uploads
 148                 'Listfiles'                 => array( 'SpecialPage', 'Listfiles' ),
 149                 'Filepath'                  => 'SpecialFilepath',
 150                 'MIMEsearch'                => array( 'SpecialPage', 'MIMEsearch' ),
 151                 'FileDuplicateSearch'       => array( 'SpecialPage', 'FileDuplicateSearch' ),
 152                 'Upload'                    => 'SpecialUpload',
 153                 'UploadStash'               => 'SpecialUploadStash',
 154
 155                 # Wiki data and tools
 156                 'Statistics'                => 'SpecialStatistics',
 157                 'Allmessages'               => 'SpecialAllmessages',
 158                 'Version'                   => 'SpecialVersion',
 159                 'Lockdb'                    => 'SpecialLockdb',
 160                 'Unlockdb'                  => 'SpecialUnlockdb',
 161
 162                 # Redirecting special pages
 163                 'LinkSearch'                => array( 'SpecialPage', 'LinkSearch' ),
 164                 'Randompage'                => 'Randompage',
 165                 'Randomredirect'            => 'SpecialRandomredirect',
 166
 167                 # High use pages
 168                 'Mostlinkedcategories'      => array( 'SpecialPage', 'Mostlinkedcategories' ),
 169                 'Mostimages'                => array( 'SpecialPage', 'Mostimages' ),
 170                 'Mostlinked'                => array( 'SpecialPage', 'Mostlinked' ),
 171                 'Mostlinkedtemplates'       => array( 'SpecialPage', 'Mostlinkedtemplates' ),
 172                 'Mostcategories'            => array( 'SpecialPage', 'Mostcategories' ),
 173                 'Mostrevisions'             => array( 'SpecialPage', 'Mostrevisions' ),
 174
 175                 # Page tools
 176                 'ComparePages'              => 'SpecialComparePages',
 177                 'Export'                    => 'SpecialExport',
 178                 'Import'                    => 'SpecialImport',
 179                 'Undelete'                  => 'UndeleteForm',
 180                 'Whatlinkshere'             => 'SpecialWhatlinkshere',
 181                 'MergeHistory'              => 'SpecialMergeHistory',
 182
 183                 # Other
 184                 'Booksources'               => 'SpecialBookSources',
 185
 186                 # Unlisted / redirects
 187                 'Blankpage'                 => 'SpecialBlankpage',
 188                 'Blockme'                   => 'SpecialBlockme',
 189                 'Emailuser'                 => 'SpecialEmailUser',
 190                 'Movepage'                  => 'MovePageForm',
 191                 'Mycontributions'           => 'SpecialMycontributions',
 192                 'Mypage'                    => 'SpecialMypage',
 193                 'Mytalk'                    => 'SpecialMytalk',
 194                 'Myuploads'                 => 'SpecialMyuploads',
 195                 'Revisiondelete'            => 'SpecialRevisionDelete',
 196                 'RevisionMove'              => 'SpecialRevisionMove',
 197                 'Specialpages'              => 'SpecialSpecialpages',
 198                 'Userlogout'                => 'SpecialUserlogout',
 199         );
 200
 201         static public $mAliases;
 202         static public $mListInitialised = false;
 203
 204         /**#@-*/
 205
 206         /**
 207          * Initialise the special page list
 208          * This must be called before accessing SpecialPage::$mList
 209          */
 210         static function initList() {
 211                 global $wgSpecialPages;
 212                 global $wgDisableCounters, $wgDisableInternalSearch, $wgEmailAuthentication;
 213
 214                 if ( self::$mListInitialised ) {
 215                         return;
 216                 }
 217                 wfProfileIn( __METHOD__ );
 218
 219                 # Better to set this now, to avoid infinite recursion in carelessly written hooks
 220                 self::$mListInitialised = true;
 221
 222                 if( !$wgDisableCounters ) {
 223                         self::$mList['Popularpages'] = array( 'SpecialPage', 'Popularpages' );
 224                 }
 225
 226                 if( !$wgDisableInternalSearch ) {
 227                         self::$mList['Search'] = 'SpecialSearch';
 228                 }
 229
 230                 if( $wgEmailAuthentication ) {
 231                         self::$mList['Confirmemail'] = 'EmailConfirmation';
 232                         self::$mList['Invalidateemail'] = 'EmailInvalidation';
 233                 }
 234
 235                 # Add extension special pages
 236                 self::$mList = array_merge( self::$mList, $wgSpecialPages );
 237
 238                 # Run hooks
 239                 # This hook can be used to remove undesired built-in special pages
 240                 wfRunHooks( 'SpecialPage_initList', array( &self::$mList ) );
 241                 wfProfileOut( __METHOD__ );
 242         }
 243
 244         static function initAliasList() {
 245                 if ( !is_null( self::$mAliases ) ) {
 246                         return;
 247                 }
 248
 249                 global $wgContLang;
 250                 $aliases = $wgContLang->getSpecialPageAliases();
 251                 $missingPages = self::$mList;
 252                 self::$mAliases = array();
 253                 foreach ( $aliases as $realName => $aliasList ) {
 254                         foreach ( $aliasList as $alias ) {
 255                                 self::$mAliases[$wgContLang->caseFold( $alias )] = $realName;
 256                         }
 257                         unset( $missingPages[$realName] );
 258                 }
 259                 foreach ( $missingPages as $name => $stuff ) {
 260                         self::$mAliases[$wgContLang->caseFold( $name )] = $name;
 261                 }
 262         }
 263
 264         /**
 265          * Given a special page alias, return the special page name.
 266          * Returns false if there is no such alias.
 267          *
 268          * @param $alias String
 269          * @return String or false
 270          */
 271         static function resolveAlias( $alias ) {
 272                 global $wgContLang;
 273
 274                 if ( !self::$mListInitialised ) self::initList();
 275                 if ( is_null( self::$mAliases ) ) self::initAliasList();
 276                 $caseFoldedAlias = $wgContLang->caseFold( $alias );
 277                 $caseFoldedAlias = str_replace( ' ', '_', $caseFoldedAlias );
 278                 if ( isset( self::$mAliases[$caseFoldedAlias] ) ) {
 279                         return self::$mAliases[$caseFoldedAlias];
 280                 } else {
 281                         return false;
 282                 }
 283         }
 284
 285         /**
 286          * Given a special page name with a possible subpage, return an array
 287          * where the first element is the special page name and the second is the
 288          * subpage.
 289          *
 290          * @param $alias String
 291          * @return Array
 292          */
 293         static function resolveAliasWithSubpage( $alias ) {
 294                 $bits = explode( '/', $alias, 2 );
 295                 $name = self::resolveAlias( $bits[0] );
 296                 if( !isset( $bits[1] ) ) { // bug 2087
 297                         $par = null;
 298                 } else {
 299                         $par = $bits[1];
 300                 }
 301                 return array( $name, $par );
 302         }
 303
 304         /**
 305          * Add a page to the list of valid special pages. This used to be the preferred
 306          * method for adding special pages in extensions. It's now suggested that you add
 307          * an associative record to $wgSpecialPages. This avoids autoloading SpecialPage.
 308          *
 309          * @param $page SpecialPage
 310          * Deprecated in 1.7, warnings in 1.17, might be removed in 1.20
 311          */
 312         static function addPage( &$page ) {
 313                 wfDeprecated( __METHOD__ );
 314                 if ( !self::$mListInitialised ) {
 315                         self::initList();
 316                 }
 317                 self::$mList[$page->mName] = $page;
 318         }
 319
 320         /**
 321          * Add a page to a certain display group for Special:SpecialPages
 322          *
 323          * @param $page Mixed: SpecialPage or string
 324          * @param $group String
 325          */
 326         static function setGroup( $page, $group ) {
 327                 global $wgSpecialPageGroups;
 328                 $name = is_object($page) ? $page->mName : $page;
 329                 $wgSpecialPageGroups[$name] = $group;
 330         }
 331
 332         /**
 333          * Add a page to a certain display group for Special:SpecialPages
 334          *
 335          * @param $page SpecialPage
 336          */
 337         static function getGroup( &$page ) {
 338                 global $wgSpecialPageGroups;
 339                 static $specialPageGroupsCache = array();
 340                 if( isset($specialPageGroupsCache[$page->mName]) ) {
 341                         return $specialPageGroupsCache[$page->mName];
 342                 }
 343                 $group = wfMsg('specialpages-specialpagegroup-'.strtolower($page->mName));
 344                 if( $group == ''
 345                  || wfEmptyMsg('specialpages-specialpagegroup-'.strtolower($page->mName), $group ) ) {
 346                         $group = isset($wgSpecialPageGroups[$page->mName])
 347                                 ? $wgSpecialPageGroups[$page->mName]
 348                                 : '-';
 349                 }
 350                 if( $group == '-' ) $group = 'other';
 351                 $specialPageGroupsCache[$page->mName] = $group;
 352                 return $group;
 353         }
 354
 355         /**
 356          * Remove a special page from the list
 357          * Formerly used to disable expensive or dangerous special pages. The
 358          * preferred method is now to add a SpecialPage_initList hook.
 359          */
 360         static function removePage( $name ) {
 361                 if ( !self::$mListInitialised ) {
 362                         self::initList();
 363                 }
 364                 unset( self::$mList[$name] );
 365         }
 366
 367         /**
 368          * Check if a given name exist as a special page or as a special page alias
 369          *
 370          * @param $name String: name of a special page
 371          * @return Boolean: true if a special page exists with this name
 372          */
 373         static function exists( $name ) {
 374                 global $wgContLang;
 375                 if ( !self::$mListInitialised ) {
 376                         self::initList();
 377                 }
 378                 if( !self::$mAliases ) {
 379                         self::initAliasList();
 380                 }
 381
 382                 # Remove special pages inline parameters:
 383                 $bits = explode( '/', $name );
 384                 $name = $wgContLang->caseFold($bits[0]);
 385
 386                 return
 387                         array_key_exists( $name, self::$mList )
 388                         or array_key_exists( $name, self::$mAliases )
 389                 ;
 390         }
 391
 392         /**
 393          * Find the object with a given name and return it (or NULL)
 394          *
 395          * @param $name String
 396          * @return SpecialPage object or null if the page doesn't exist
 397          */
 398         static function getPage( $name ) {
 399                 if ( !self::$mListInitialised ) {
 400                         self::initList();
 401                 }
 402                 if ( array_key_exists( $name, self::$mList ) ) {
 403                         $rec = self::$mList[$name];
 404                         if ( is_string( $rec ) ) {
 405                                 $className = $rec;
 406                                 self::$mList[$name] = new $className;
 407                         } elseif ( is_array( $rec ) ) {
 408                                 $className = array_shift( $rec );
 409                                 self::$mList[$name] = wfCreateObject( $className, $rec );
 410                         }
 411                         return self::$mList[$name];
 412                 } else {
 413                         return null;
 414                 }
 415         }
 416
 417         /**
 418          * Get a special page with a given localised name, or NULL if there
 419          * is no such special page.
 420          *
 421          * @return SpecialPage object or null if the page doesn't exist
 422          */
 423         static function getPageByAlias( $alias ) {
 424                 $realName = self::resolveAlias( $alias );
 425                 if ( $realName ) {
 426                         return self::getPage( $realName );
 427                 } else {
 428                         return null;
 429                 }
 430         }
 431
 432         /**
 433          * Return categorised listable special pages which are available
 434          * for the current user, and everyone.
 435          *
 436          * @return Associative array mapping page's name to its SpecialPage object
 437          */
 438         static function getUsablePages() {
 439                 global $wgUser;
 440                 if ( !self::$mListInitialised ) {
 441                         self::initList();
 442                 }
 443                 $pages = array();
 444
 445                 foreach ( self::$mList as $name => $rec ) {
 446                         $page = self::getPage( $name );
 447                         if ( $page->isListed()
 448                                 && (
 449                                         !$page->isRestricted()
 450                                         || $page->userCanExecute( $wgUser )
 451                                 )
 452                         ) {
 453                                 $pages[$name] = $page;
 454                         }
 455                 }
 456                 return $pages;
 457         }
 458
 459         /**
 460          * Return categorised listable special pages for all users
 461          *
 462          * @return Associative array mapping page's name to its SpecialPage object
 463          */
 464         static function getRegularPages() {
 465                 if ( !self::$mListInitialised ) {
 466                         self::initList();
 467                 }
 468                 $pages = array();
 469
 470                 foreach ( self::$mList as $name => $rec ) {
 471                         $page = self::getPage( $name );
 472                         if ( $page->isListed() && !$page->isRestricted() ) {
 473                                 $pages[$name] = $page;
 474                         }
 475                 }
 476                 return $pages;
 477         }
 478
 479         /**
 480          * Return categorised listable special pages which are available
 481          * for the current user, but not for everyone
 482          *
 483          * @return Associative array mapping page's name to its SpecialPage object
 484          */
 485         static function getRestrictedPages() {
 486                 global $wgUser;
 487                 if( !self::$mListInitialised ) {
 488                         self::initList();
 489                 }
 490                 $pages = array();
 491
 492                 foreach( self::$mList as $name => $rec ) {
 493                         $page = self::getPage( $name );
 494                         if(
 495                                 $page->isListed()
 496                                 && $page->isRestricted()
 497                                 && $page->userCanExecute( $wgUser )
 498                         ) {
 499                                 $pages[$name] = $page;
 500                         }
 501                 }
 502                 return $pages;
 503         }
 504
 505         /**
 506          * Execute a special page path.
 507          * The path     may contain parameters, e.g. Special:Name/Params
 508          * Extracts the special page name and call the execute method, passing the parameters
 509          *
 510          * Returns a title object if the page is redirected, false if there was no such special
 511          * page, and true if it was successful.
 512          *
 513          * @param $title          a title object
 514          * @param $including      output is being captured for use in {{special:whatever}}
 515          */
 516         static function executePath( &$title, $including = false ) {
 517                 global $wgOut, $wgTitle, $wgRequest;
 518                 wfProfileIn( __METHOD__ );
 519
 520                 # FIXME: redirects broken due to this call
 521                 $bits = explode( '/', $title->getDBkey(), 2 );
 522                 $name = $bits[0];
 523                 if( !isset( $bits[1] ) ) { // bug 2087
 524                         $par = null;
 525                 } else {
 526                         $par = $bits[1];
 527                 }
 528                 $page = SpecialPage::getPageByAlias( $name );
 529                 # Nonexistent?
 530                 if ( !$page ) {
 531                         if ( !$including ) {
 532                                 $wgOut->setArticleRelated( false );
 533                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 534                                 $wgOut->setStatusCode( 404 );
 535                                 $wgOut->showErrorPage( 'nosuchspecialpage', 'nospecialpagetext' );
 536                         }
 537                         wfProfileOut( __METHOD__ );
 538                         return false;
 539                 }
 540
 541                 # Check for redirect
 542                 if ( !$including ) {
 543                         $redirect = $page->getRedirect( $par );
 544                         if ( $redirect ) {
 545                                 $query = $page->getRedirectQuery();
 546                                 $url = $redirect->getFullUrl( $query );
 547                                 $wgOut->redirect( $url );
 548                                 wfProfileOut( __METHOD__ );
 549                                 return $redirect;
 550                         }
 551                 }
 552
 553                 # Redirect to canonical alias for GET commands
 554                 # Not for POST, we'd lose the post data, so it's best to just distribute
 555                 # the request. Such POST requests are possible for old extensions that
 556                 # generate self-links without being aware that their default name has
 557                 # changed.
 558                 if ( !$including && $name != $page->getLocalName() && !$wgRequest->wasPosted() ) {
 559                         $query = $_GET;
 560                         unset( $query['title'] );
 561                         $query = wfArrayToCGI( $query );
 562                         $title = $page->getTitle( $par );
 563                         $url = $title->getFullUrl( $query );
 564                         $wgOut->redirect( $url );
 565                         wfProfileOut( __METHOD__ );
 566                         return $redirect;
 567                 }
 568
 569                 if ( $including && !$page->includable() ) {
 570                         wfProfileOut( __METHOD__ );
 571                         return false;
 572                 } elseif ( !$including ) {
 573                         $wgTitle = $page->getTitle();
 574                 }
 575                 $page->including( $including );
 576
 577                 // Execute special page
 578                 $profName = 'Special:' . $page->name();
 579                 wfProfileIn( $profName );
 580                 $page->execute( $par );
 581                 wfProfileOut( $profName );
 582                 wfProfileOut( __METHOD__ );
 583                 return true;
 584         }
 585
 586         /**
 587          * Just like executePath() except it returns the HTML instead of outputting it
 588          * Returns false if there was no such special page, or a title object if it was
 589          * a redirect.
 590          *
 591          * @return String: HTML fragment
 592          */
 593         static function capturePath( &$title ) {
 594                 global $wgOut, $wgTitle;
 595
 596                 $oldTitle = $wgTitle;
 597                 $oldOut = $wgOut;
 598                 $wgOut = new OutputPage;
 599                 $wgOut->setTitle( $title );
 600
 601                 $ret = SpecialPage::executePath( $title, true );
 602                 if ( $ret === true ) {
 603                         $ret = $wgOut->getHTML();
 604                 }
 605                 $wgTitle = $oldTitle;
 606                 $wgOut = $oldOut;
 607                 return $ret;
 608         }
 609
 610         /**
 611          * Get the local name for a specified canonical name
 612          *
 613          * @param $name String
 614          * @param $subpage Mixed: boolean false, or string
 615          *
 616          * @return String
 617          */
 618         static function getLocalNameFor( $name, $subpage = false ) {
 619                 global $wgContLang;
 620                 $aliases = $wgContLang->getSpecialPageAliases();
 621                 if ( isset( $aliases[$name][0] ) ) {
 622                         $name = $aliases[$name][0];
 623                 } else {
 624                         // Try harder in case someone misspelled the correct casing
 625                         $found = false;
 626                         foreach ( $aliases as $n => $values ) {
 627                                 if ( strcasecmp( $name, $n ) === 0 ) {
 628                                         wfWarn( "Found alias defined for $n when searching for" .
 629                                                 "special page aliases for $name. Case mismatch?" );
 630                                         $name = $values[0];
 631                                         $found = true;
 632                                         break;
 633                                 }
 634                         }
 635                         if ( !$found ) {
 636                                 wfWarn( "Did not find alias for special page '$name'. " .
 637                                         "Perhaps no aliases are defined for it?" );
 638                         }
 639                 }
 640                 if ( $subpage !== false && !is_null( $subpage ) ) {
 641                         $name = "$name/$subpage";
 642                 }
 643                 return $wgContLang->ucfirst( $name );
 644         }
 645
 646         /**
 647          * Get a localised Title object for a specified special page name
 648          *
 649          * @return Title object
 650          */
 651         static function getTitleFor( $name, $subpage = false ) {
 652                 $name = self::getLocalNameFor( $name, $subpage );
 653                 if ( $name ) {
 654                         return Title::makeTitle( NS_SPECIAL, $name );
 655                 } else {
 656                         throw new MWException( "Invalid special page name \"$name\"" );
 657                 }
 658         }
 659
 660         /**
 661          * Get a localised Title object for a page name with a possibly unvalidated subpage
 662          *
 663          * @return Title object or null if the page doesn't exist
 664          */
 665         static function getSafeTitleFor( $name, $subpage = false ) {
 666                 $name = self::getLocalNameFor( $name, $subpage );
 667                 if ( $name ) {
 668                         return Title::makeTitleSafe( NS_SPECIAL, $name );
 669                 } else {
 670                         return null;
 671                 }
 672         }
 673
 674         /**
 675          * Get a title for a given alias
 676          *
 677          * @return Title or null if there is no such alias
 678          */
 679         static function getTitleForAlias( $alias ) {
 680                 $name = self::resolveAlias( $alias );
 681                 if ( $name ) {
 682                         return self::getTitleFor( $name );
 683                 } else {
 684                         return null;
 685                 }
 686         }
 687
 688         /**
 689          * Default constructor for special pages
 690          * Derivative classes should call this from their constructor
 691          *     Note that if the user does not have the required level, an error message will
 692          *     be displayed by the default execute() method, without the global function ever
 693          *     being called.
 694          *
 695          *     If you override execute(), you can recover the default behaviour with userCanExecute()
 696          *     and displayRestrictionError()
 697          *
 698          * @param $name String: name of the special page, as seen in links and URLs
 699          * @param $restriction String: user right required, e.g. "block" or "delete"
 700          * @param $listed Boolean: whether the page is listed in Special:Specialpages
 701          * @param $function Callback: function called by execute(). By default it is constructed from $name
 702          * @param $file String: file which is included by execute(). It is also constructed from $name by default
 703          * @param $includable Boolean: whether the page can be included in normal pages
 704          */
 705         public function __construct( $name = '', $restriction = '', $listed = true, $function = false, $file = 'default', $includable = false ) {
 706                 $this->init( $name, $restriction, $listed, $function, $file, $includable );
 707         }
 708
 709         /**
 710          * Do the real work for the constructor, mainly so __call() can intercept
 711          * calls to SpecialPage()
 712          * @see __construct() for param docs
 713          */
 714         private function init( $name, $restriction, $listed, $function, $file, $includable ) {
 715                 $this->mName = $name;
 716                 $this->mRestriction = $restriction;
 717                 $this->mListed = $listed;
 718                 $this->mIncludable = $includable;
 719                 if ( !$function ) {
 720                         $this->mFunction = 'wfSpecial'.$name;
 721                 } else {
 722                         $this->mFunction = $function;
 723                 }
 724                 if ( $file === 'default' ) {
 725                         $this->mFile = dirname(__FILE__) . "/specials/Special$name.php";
 726                 } else {
 727                         $this->mFile = $file;
 728                 }
 729         }
 730
 731         /**
 732          * Use PHP's magic __call handler to get calls to the old PHP4 constructor
 733          * because PHP E_STRICT yells at you for having __construct() and SpecialPage()
 734          *
 735          * @param $fName String Name of called method
 736          * @param $a Array Arguments to the method
 737          * @deprecated Call isn't deprecated, but SpecialPage::SpecialPage() is
 738          */
 739         public function __call( $fName, $a ) {
 740                 // Sometimes $fName is SpecialPage, sometimes it's specialpage. <3 PHP
 741                 if( strtolower( $fName ) == 'specialpage' ) {
 742                         // Debug messages now, warnings in 1.19 or 1.20?
 743                         wfDebug( "Deprecated SpecialPage::SpecialPage() called, use __construct();\n" );
 744                         $name = isset( $a[0] ) ? $a[0] : '';
 745                         $restriction = isset( $a[1] ) ? $a[1] : '';
 746                         $listed = isset( $a[2] ) ? $a[2] : true;
 747                         $function = isset( $a[3] ) ? $a[3] : false;
 748                         $file = isset( $a[4] ) ? $a[4] : 'default';
 749                         $includable = isset( $a[5] ) ? $a[5] : false;
 750                         $this->init( $name, $restriction, $listed, $function, $file, $includable );
 751                 }
 752         }
 753
 754         /**#@+
 755           * Accessor
 756           *
 757           * @deprecated
 758           */
 759         function getName() { return $this->mName; }
 760         function getRestriction() { return $this->mRestriction; }
 761         function getFile() { return $this->mFile; }
 762         function isListed() { return $this->mListed; }
 763         /**#@-*/
 764
 765         /**#@+
 766           * Accessor and mutator
 767           */
 768         function name( $x = null ) { return wfSetVar( $this->mName, $x ); }
 769         function restrictions( $x = null) {
 770                 # Use the one below this
 771                 wfDeprecated( __METHOD__ );
 772                 return wfSetVar( $this->mRestriction, $x );
 773         }
 774         function restriction( $x = null) { return wfSetVar( $this->mRestriction, $x ); }
 775         function listed( $x = null) { return wfSetVar( $this->mListed, $x ); }
 776         function func( $x = null) { return wfSetVar( $this->mFunction, $x ); }
 777         function file( $x = null) { return wfSetVar( $this->mFile, $x ); }
 778         function includable( $x = null ) { return wfSetVar( $this->mIncludable, $x ); }
 779         function including( $x = null ) { return wfSetVar( $this->mIncluding, $x ); }
 780         /**#@-*/
 781
 782         /**
 783          * Get the localised name of the special page
 784          */
 785         function getLocalName() {
 786                 if ( !isset( $this->mLocalName ) ) {
 787                         $this->mLocalName = self::getLocalNameFor( $this->mName );
 788                 }
 789                 return $this->mLocalName;
 790         }
 791
 792         /**
 793          * Can be overridden by subclasses with more complicated permissions
 794          * schemes.
 795          *
 796          * @return Boolean: should the page be displayed with the restricted-access
 797          *   pages?
 798          */
 799         public function isRestricted() {
 800                 global $wgGroupPermissions;
 801                 // DWIM: If all anons can do something, then it is not restricted
 802                 return $this->mRestriction != '' && empty($wgGroupPermissions['*'][$this->mRestriction]);
 803         }
 804
 805         /**
 806          * Checks if the given user (identified by an object) can execute this
 807          * special page (as defined by $mRestriction).  Can be overridden by sub-
 808          * classes with more complicated permissions schemes.
 809          *
 810          * @param $user User: the user to check
 811          * @return Boolean: does the user have permission to view the page?
 812          */
 813         public function userCanExecute( $user ) {
 814                 return $user->isAllowed( $this->mRestriction );
 815         }
 816
 817         /**
 818          * Output an error message telling the user what access level they have to have
 819          */
 820         function displayRestrictionError() {
 821                 global $wgOut;
 822                 $wgOut->permissionRequired( $this->mRestriction );
 823         }
 824
 825         /**
 826          * Sets headers - this should be called from the execute() method of all derived classes!
 827          */
 828         function setHeaders() {
 829                 global $wgOut;
 830                 $wgOut->setArticleRelated( false );
 831                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 832                 $wgOut->setPageTitle( $this->getDescription() );
 833         }
 834
 835         /**
 836          * Default execute method
 837          * Checks user permissions, calls the function given in mFunction
 838          *
 839          * This may be overridden by subclasses.
 840          */
 841         function execute( $par ) {
 842                 global $wgUser;
 843
 844                 $this->setHeaders();
 845
 846                 if ( $this->userCanExecute( $wgUser ) ) {
 847                         $func = $this->mFunction;
 848                         // only load file if the function does not exist
 849                         if(!is_callable($func) and $this->mFile) {
 850                                 require_once( $this->mFile );
 851                         }
 852                         $this->outputHeader();
 853                         call_user_func( $func, $par, $this );
 854                 } else {
 855                         $this->displayRestrictionError();
 856                 }
 857         }
 858
 859         /**
 860          * Outputs a summary message on top of special pages
 861          * Per default the message key is the canonical name of the special page
 862          * May be overriden, i.e. by extensions to stick with the naming conventions
 863          * for message keys: 'extensionname-xxx'
 864          *
 865          * @param $summaryMessageKey String: message key of the summary
 866          */
 867         function outputHeader( $summaryMessageKey = '' ) {
 868                 global $wgOut, $wgContLang;
 869
 870                 if( $summaryMessageKey == '' ) {
 871                         $msg = $wgContLang->lc( $this->name() ) . '-summary';
 872                 } else {
 873                         $msg = $summaryMessageKey;
 874                 }
 875                 $out = wfMsgNoTrans( $msg );
 876                 if ( ! wfEmptyMsg( $msg, $out ) and  $out !== '' and ! $this->including() ) {
 877                         $wgOut->wrapWikiMsg( "<div class='mw-specialpage-summary'>\n$1\n</div>", $msg );
 878                 }
 879
 880         }
 881
 882         /**
 883          * Returns the name that goes in the \<h1\> in the special page itself, and
 884          * also the name that will be listed in Special:Specialpages
 885          *
 886          * Derived classes can override this, but usually it is easier to keep the
 887          * default behaviour. Messages can be added at run-time, see
 888          * MessageCache.php.
 889          *
 890          * @return String
 891          */
 892         function getDescription() {
 893                 return wfMsg( strtolower( $this->mName ) );
 894         }
 895
 896         /**
 897          * Get a self-referential title object
 898          *
 899          * @return Title object
 900          */
 901         function getTitle( $subpage = false ) {
 902                 return self::getTitleFor( $this->mName, $subpage );
 903         }
 904
 905         /**
 906          * Set whether this page is listed in Special:Specialpages, at run-time
 907          */
 908         function setListed( $listed ) {
 909                 return wfSetVar( $this->mListed, $listed );
 910         }
 911
 912         /**
 913          * If the special page is a redirect, then get the Title object it redirects to.
 914          * False otherwise.
 915          */
 916         function getRedirect( $subpage ) {
 917                 return false;
 918         }
 919
 920         /**
 921          * Return part of the request string for a special redirect page
 922          * This allows passing, e.g. action=history to Special:Mypage, etc.
 923          *
 924          * @return String
 925          */
 926         function getRedirectQuery() {
 927                 global $wgRequest;
 928                 $params = array();
 929                 foreach( $this->mAllowedRedirectParams as $arg ) {
 930                         if( ( $val = $wgRequest->getVal( $arg, null ) ) !== null )
 931                                 $params[] = $arg . '=' . $val;
 932                 }
 933
 934                 foreach( $this->mAddedRedirectParams as $arg => $val ) {
 935                         $params[] = $arg . '=' . $val;
 936                 }
 937
 938                 return count( $params ) ? implode( '&', $params ) : false;
 939         }
 940 }
 941
 942 /**
 943  * Shortcut to construct a special page which is unlisted by default
 944  * @ingroup SpecialPage
 945  */
 946 class UnlistedSpecialPage extends SpecialPage
 947 {
 948         function __construct( $name, $restriction = '', $function = false, $file = 'default' ) {
 949                 parent::__construct( $name, $restriction, false, $function, $file );
 950         }
 951 }
 952
 953 /**
 954  * Shortcut to construct an includable special  page
 955  * @ingroup SpecialPage
 956  */
 957 class IncludableSpecialPage extends SpecialPage
 958 {
 959         function __construct( $name, $restriction = '', $listed = true, $function = false, $file = 'default' ) {
 960                 parent::__construct( $name, $restriction, $listed, $function, $file, true );
 961         }
 962 }
 963
 964 /**
 965  * Shortcut to construct a special page alias.
 966  * @ingroup SpecialPage
 967  */
 968 class SpecialRedirectToSpecial extends UnlistedSpecialPage {
 969         var $redirName, $redirSubpage;
 970
 971         function __construct( $name, $redirName, $redirSubpage = false, $allowedRedirectParams = array(), $addedRedirectParams = array() ) {
 972                 parent::__construct( $name );
 973                 $this->redirName = $redirName;
 974                 $this->redirSubpage = $redirSubpage;
 975                 $this->mAllowedRedirectParams = $allowedRedirectParams;
 976                 $this->mAddedRedirectParams = $addedRedirectParams;
 977         }
 978
 979         function getRedirect( $subpage ) {
 980                 if ( $this->redirSubpage === false ) {
 981                         return SpecialPage::getTitleFor( $this->redirName, $subpage );
 982                 } else {
 983                         return SpecialPage::getTitleFor( $this->redirName, $this->redirSubpage );
 984                 }
 985         }
 986 }
 987
 988 /** SpecialMypage, SpecialMytalk and SpecialMycontributions special pages
 989  * are used to get user independant links pointing to the user page, talk
 990  * page and list of contributions.
 991  * This can let us cache a single copy of any generated content for all
 992  * users.
 993  */
 994
 995 /**
 996  * Shortcut to construct a special page pointing to current user user's page.
 997  * @ingroup SpecialPage
 998  */
 999 class SpecialMypage extends UnlistedSpecialPage {
1000         function __construct() {
1001                 parent::__construct( 'Mypage' );
1002                 $this->mAllowedRedirectParams = array( 'action' , 'preload' , 'editintro',
1003                         'section', 'oldid', 'diff', 'dir' );
1004         }
1005
1006         function getRedirect( $subpage ) {
1007                 global $wgUser;
1008                 if ( strval( $subpage ) !== '' ) {
1009                         return Title::makeTitle( NS_USER, $wgUser->getName() . '/' . $subpage );
1010                 } else {
1011                         return Title::makeTitle( NS_USER, $wgUser->getName() );
1012                 }
1013         }
1014 }
1015
1016 /**
1017  * Shortcut to construct a special page pointing to current user talk page.
1018  * @ingroup SpecialPage
1019  */
1020 class SpecialMytalk extends UnlistedSpecialPage {
1021         function __construct() {
1022                 parent::__construct( 'Mytalk' );
1023                 $this->mAllowedRedirectParams = array( 'action' , 'preload' , 'editintro',
1024                         'section', 'oldid', 'diff', 'dir' );
1025         }
1026
1027         function getRedirect( $subpage ) {
1028                 global $wgUser;
1029                 if ( strval( $subpage ) !== '' ) {
1030                         return Title::makeTitle( NS_USER_TALK, $wgUser->getName() . '/' . $subpage );
1031                 } else {
1032                         return Title::makeTitle( NS_USER_TALK, $wgUser->getName() );
1033                 }
1034         }
1035 }
1036
1037 /**
1038  * Shortcut to construct a special page pointing to current user contributions.
1039  * @ingroup SpecialPage
1040  */
1041 class SpecialMycontributions extends UnlistedSpecialPage {
1042         function __construct() {
1043                 parent::__construct(  'Mycontributions' );
1044                 $this->mAllowedRedirectParams = array( 'limit', 'namespace', 'tagfilter',
1045                         'offset', 'dir', 'year', 'month', 'feed' );
1046         }
1047
1048         function getRedirect( $subpage ) {
1049                 global $wgUser;
1050                 return SpecialPage::getTitleFor( 'Contributions', $wgUser->getName() );
1051         }
1052 }
1053
1054 /**
1055  * Redirect to Special:Listfiles?user=$wgUser
1056  */
1057 class SpecialMyuploads extends UnlistedSpecialPage {
1058         function __construct() {
1059                 parent::__construct( 'Myuploads' );
1060                 $this->mAllowedRedirectParams = array( 'limit' );
1061         }
1062
1063         function getRedirect( $subpage ) {
1064                 global $wgUser;
1065                 return SpecialPage::getTitleFor( 'Listfiles', $wgUser->getName() );
1066         }
1067 }