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  * @addtogroup SpecialPage
  21  */
  22
  23 /**
  24  * @access private
  25  */
  26
  27 /**
  28  * Parent special page class, also static functions for handling the special
  29  * page list.
  30  * @addtogroup SpecialPage
  31  */
  32 class SpecialPage
  33 {
  34         /**#@+
  35          * @access private
  36          */
  37         /**
  38          * The canonical name of this special page
  39          * Also used for the default <h1> heading, @see getDescription()
  40          */
  41         var $mName;
  42         /**
  43          * The local name of this special page
  44          */
  45         var $mLocalName;
  46         /**
  47          * Minimum user level required to access this page, or "" for anyone.
  48          * Also used to categorise the pages in Special:Specialpages
  49          */
  50         var $mRestriction;
  51         /**
  52          * Listed in Special:Specialpages?
  53          */
  54         var $mListed;
  55         /**
  56          * Function name called by the default execute()
  57          */
  58         var $mFunction;
  59         /**
  60          * File which needs to be included before the function above can be called
  61          */
  62         var $mFile;
  63         /**
  64          * Whether or not this special page is being included from an article
  65          */
  66         var $mIncluding;
  67         /**
  68          * Whether the special page can be included in an article
  69          */
  70         var $mIncludable;
  71         /**
  72          * Query parameters that can be passed through redirects
  73          */
  74         var $mAllowedRedirectParams = array();
  75
  76         static public $mList = array(
  77                 'DoubleRedirects'           => array( 'SpecialPage', 'DoubleRedirects' ),
  78                 'BrokenRedirects'           => array( 'SpecialPage', 'BrokenRedirects' ),
  79                 'Disambiguations'           => array( 'SpecialPage', 'Disambiguations' ),
  80
  81                 'Userlogin'                 => array( 'SpecialPage', 'Userlogin' ),
  82                 'Userlogout'                => array( 'UnlistedSpecialPage', 'Userlogout' ),
  83                 'Preferences'               => array( 'SpecialPage', 'Preferences' ),
  84                 'Watchlist'                 => array( 'SpecialPage', 'Watchlist' ),
  85
  86                 'Recentchanges'             => array( 'IncludableSpecialPage', 'Recentchanges' ),
  87                 'Upload'                    => array( 'SpecialPage', 'Upload' ),
  88                 'Imagelist'                 => array( 'SpecialPage', 'Imagelist' ),
  89                 'Newimages'                 => array( 'IncludableSpecialPage', 'Newimages' ),
  90                 'Listusers'                 => array( 'SpecialPage', 'Listusers' ),
  91                 'Statistics'                => array( 'SpecialPage', 'Statistics' ),
  92                 'Randompage'                => array( 'SpecialPage', 'Randompage' ),
  93                 'Lonelypages'               => array( 'SpecialPage', 'Lonelypages' ),
  94                 'Uncategorizedpages'        => array( 'SpecialPage', 'Uncategorizedpages' ),
  95                 'Uncategorizedcategories'   => array( 'SpecialPage', 'Uncategorizedcategories' ),
  96                 'Uncategorizedimages'       => array( 'SpecialPage', 'Uncategorizedimages' ),
  97                 'Uncategorizedtemplates'    => array( 'SpecialPage', 'Uncategorizedtemplates' ),
  98                 'Unusedcategories'          => array( 'SpecialPage', 'Unusedcategories' ),
  99                 'Unusedimages'              => array( 'SpecialPage', 'Unusedimages' ),
 100                 'Wantedpages'               => array( 'IncludableSpecialPage', 'Wantedpages' ),
 101                 'Wantedcategories'          => array( 'SpecialPage', 'Wantedcategories' ),
 102                 'Mostlinked'                => array( 'SpecialPage', 'Mostlinked' ),
 103                 'Mostlinkedcategories'      => array( 'SpecialPage', 'Mostlinkedcategories' ),
 104                 'Mostlinkedtemplates'       => array( 'SpecialPage', 'Mostlinkedtemplates' ),
 105                 'Mostcategories'            => array( 'SpecialPage', 'Mostcategories' ),
 106                 'Mostimages'                => array( 'SpecialPage', 'Mostimages' ),
 107                 'Mostrevisions'             => array( 'SpecialPage', 'Mostrevisions' ),
 108                 'Fewestrevisions'           => array( 'SpecialPage', 'Fewestrevisions' ),
 109                 'Shortpages'                => array( 'SpecialPage', 'Shortpages' ),
 110                 'Longpages'                 => array( 'SpecialPage', 'Longpages' ),
 111                 'Newpages'                  => array( 'IncludableSpecialPage', 'Newpages' ),
 112                 'Ancientpages'              => array( 'SpecialPage', 'Ancientpages' ),
 113                 'Deadendpages'              => array( 'SpecialPage', 'Deadendpages' ),
 114                 'Protectedpages'            => array( 'SpecialPage', 'Protectedpages' ),
 115                 'Allpages'                  => array( 'IncludableSpecialPage', 'Allpages' ),
 116                 'Prefixindex'               => array( 'IncludableSpecialPage', 'Prefixindex' ) ,
 117                 'Ipblocklist'               => array( 'SpecialPage', 'Ipblocklist' ),
 118                 'Specialpages'              => array( 'UnlistedSpecialPage', 'Specialpages' ),
 119                 'Contributions'             => array( 'SpecialPage', 'Contributions' ),
 120                 'Emailuser'                 => array( 'UnlistedSpecialPage', 'Emailuser' ),
 121                 'Whatlinkshere'             => array( 'SpecialPage', 'Whatlinkshere' ),
 122                 'Recentchangeslinked'       => array( 'UnlistedSpecialPage', 'Recentchangeslinked' ),
 123                 'Movepage'                  => array( 'UnlistedSpecialPage', 'Movepage' ),
 124                 'Blockme'                   => array( 'UnlistedSpecialPage', 'Blockme' ),
 125                 'Resetpass'                 => array( 'UnlistedSpecialPage', 'Resetpass' ),
 126                 'Booksources'               => 'SpecialBookSources',
 127                 'Categories'                => array( 'SpecialPage', 'Categories' ),
 128                 'Export'                    => array( 'SpecialPage', 'Export' ),
 129                 'Version'                   => array( 'SpecialPage', 'Version' ),
 130                 'Allmessages'               => array( 'SpecialPage', 'Allmessages' ),
 131                 'Log'                       => array( 'SpecialPage', 'Log' ),
 132                 'Blockip'                   => array( 'SpecialPage', 'Blockip', 'block' ),
 133                 'Undelete'                  => array( 'SpecialPage', 'Undelete', 'deletedhistory' ),
 134                 'Import'                    => array( 'SpecialPage', 'Import', 'import' ),
 135                 'Lockdb'                    => array( 'SpecialPage', 'Lockdb', 'siteadmin' ),
 136                 'Unlockdb'                  => array( 'SpecialPage', 'Unlockdb', 'siteadmin' ),
 137                 'Userrights'                => array( 'SpecialPage', 'Userrights', 'userrights' ),
 138                 'MIMEsearch'                => array( 'SpecialPage', 'MIMEsearch' ),
 139                 'Unwatchedpages'            => array( 'SpecialPage', 'Unwatchedpages', 'unwatchedpages' ),
 140                 'Listredirects'             => array( 'SpecialPage', 'Listredirects' ),
 141                 'Revisiondelete'            => array( 'UnlistedSpecialPage', 'Revisiondelete', 'deleterevision' ),
 142                 'Unusedtemplates'           => array( 'SpecialPage', 'Unusedtemplates' ),
 143                 'Randomredirect'            => array( 'SpecialPage', 'Randomredirect' ),
 144                 'Withoutinterwiki'          => array( 'SpecialPage', 'Withoutinterwiki' ),
 145
 146                 'Mypage'                    => array( 'SpecialMypage' ),
 147                 'Mytalk'                    => array( 'SpecialMytalk' ),
 148                 'Mycontributions'           => array( 'SpecialMycontributions' ),
 149                 'Listadmins'                => array( 'SpecialRedirectToSpecial', 'Listadmins', 'Listusers', 'sysop' ),
 150                 'MergeHistory'              => array( 'SpecialPage', 'MergeHistory', 'mergehistory' ),
 151                 'Listbots'                  => array( 'SpecialRedirectToSpecial', 'Listbots', 'Listusers', 'bot' ),
 152                 );
 153
 154         static public $mAliases;
 155         static public $mListInitialised = false;
 156
 157         /**#@-*/
 158
 159         /**
 160          * Initialise the special page list
 161          * This must be called before accessing SpecialPage::$mList
 162          */
 163         static function initList() {
 164                 global $wgSpecialPages;
 165                 global $wgDisableCounters, $wgDisableInternalSearch, $wgEmailAuthentication;
 166
 167                 if ( self::$mListInitialised ) {
 168                         return;
 169                 }
 170                 wfProfileIn( __METHOD__ );
 171
 172                 # Better to set this now, to avoid infinite recursion in carelessly written hooks
 173                 self::$mListInitialised = true;
 174
 175                 if( !$wgDisableCounters ) {
 176                         self::$mList['Popularpages'] = array( 'SpecialPage', 'Popularpages' );
 177                 }
 178
 179                 if( !$wgDisableInternalSearch ) {
 180                         self::$mList['Search'] = array( 'SpecialPage', 'Search' );
 181                 }
 182
 183                 if( $wgEmailAuthentication ) {
 184                         self::$mList['Confirmemail'] = 'EmailConfirmation';
 185                 }
 186
 187                 # Add extension special pages
 188                 self::$mList = array_merge( self::$mList, $wgSpecialPages );
 189
 190                 # Run hooks
 191                 # This hook can be used to remove undesired built-in special pages
 192                 wfRunHooks( 'SpecialPage_initList', array( &self::$mList ) );
 193                 wfProfileOut( __METHOD__ );
 194         }
 195
 196         static function initAliasList() {
 197                 if ( !is_null( self::$mAliases ) ) {
 198                         return;
 199                 }
 200
 201                 global $wgContLang;
 202                 $aliases = $wgContLang->getSpecialPageAliases();
 203                 $missingPages = self::$mList;
 204                 self::$mAliases = array();
 205                 foreach ( $aliases as $realName => $aliasList ) {
 206                         foreach ( $aliasList as $alias ) {
 207                                 self::$mAliases[$wgContLang->caseFold( $alias )] = $realName;
 208                         }
 209                         unset( $missingPages[$realName] );
 210                 }
 211                 foreach ( $missingPages as $name => $stuff ) {
 212                         self::$mAliases[$wgContLang->caseFold( $name )] = $name;
 213                 }
 214         }
 215
 216         /**
 217          * Given a special page alias, return the special page name.
 218          * Returns false if there is no such alias.
 219          */
 220         static function resolveAlias( $alias ) {
 221                 global $wgContLang;
 222
 223                 if ( !self::$mListInitialised ) self::initList();
 224                 if ( is_null( self::$mAliases ) ) self::initAliasList();
 225                 $caseFoldedAlias = $wgContLang->caseFold( $alias );
 226                 if ( isset( self::$mAliases[$caseFoldedAlias] ) ) {
 227                         return self::$mAliases[$caseFoldedAlias];
 228                 } else {
 229                         return false;
 230                 }
 231         }
 232
 233         /**
 234          * Given a special page name with a possible subpage, return an array
 235          * where the first element is the special page name and the second is the
 236          * subpage.
 237          */
 238         static function resolveAliasWithSubpage( $alias ) {
 239                 $bits = explode( '/', $alias, 2 );
 240                 $name = self::resolveAlias( $bits[0] );
 241                 if( !isset( $bits[1] ) ) { // bug 2087
 242                         $par = NULL;
 243                 } else {
 244                         $par = $bits[1];
 245                 }
 246                 return array( $name, $par );
 247         }
 248
 249         /**
 250          * Add a page to the list of valid special pages. This used to be the preferred
 251          * method for adding special pages in extensions. It's now suggested that you add
 252          * an associative record to $wgSpecialPages. This avoids autoloading SpecialPage.
 253          *
 254          * @param mixed $page Must either be an array specifying a class name and
 255          *                    constructor parameters, or an object. The object,
 256          *                    when constructed, must have an execute() method which
 257          *                    sends HTML to $wgOut.
 258          * @static
 259          */
 260         static function addPage( &$page ) {
 261                 if ( !self::$mListInitialised ) {
 262                         self::initList();
 263                 }
 264                 self::$mList[$page->mName] = $page;
 265         }
 266
 267         /**
 268          * Remove a special page from the list
 269          * Formerly used to disable expensive or dangerous special pages. The
 270          * preferred method is now to add a SpecialPage_initList hook.
 271          *
 272          * @static
 273          */
 274         static function removePage( $name ) {
 275                 if ( !self::$mListInitialised ) {
 276                         self::initList();
 277                 }
 278                 unset( self::$mList[$name] );
 279         }
 280
 281         /**
 282          * Check if a given name exist as a special page or as a special page alias
 283          * @param $name string: name of a special page
 284          * @return boolean: true if a special page exists with this name
 285          */
 286         static function exists( $name ) {
 287                 global $wgContLang;
 288                 if ( !self::$mListInitialised ) {
 289                         self::initList();
 290                 }
 291                 if( !self::$mAliases ) {
 292                         self::initAliasList();
 293                 }
 294
 295                 # Remove special pages inline parameters:
 296                 $bits = explode( '/', $name );
 297                 $name = $wgContLang->caseFold($bits[0]);
 298
 299                 return
 300                         array_key_exists( $name, self::$mList )
 301                         or array_key_exists( $name, self::$mAliases )
 302                 ;
 303         }
 304
 305         /**
 306          * Find the object with a given name and return it (or NULL)
 307          * @static
 308          * @param string $name
 309          */
 310         static function getPage( $name ) {
 311                 if ( !self::$mListInitialised ) {
 312                         self::initList();
 313                 }
 314                 if ( array_key_exists( $name, self::$mList ) ) {
 315                         $rec = self::$mList[$name];
 316                         if ( is_string( $rec ) ) {
 317                                 $className = $rec;
 318                                 self::$mList[$name] = new $className;
 319                         } elseif ( is_array( $rec ) ) {
 320                                 $className = array_shift( $rec );
 321                                 self::$mList[$name] = wfCreateObject( $className, $rec );
 322                         }
 323                         return self::$mList[$name];
 324                 } else {
 325                         return NULL;
 326                 }
 327         }
 328
 329         /**
 330          * Get a special page with a given localised name, or NULL if there
 331          * is no such special page.
 332          */
 333         static function getPageByAlias( $alias ) {
 334                 $realName = self::resolveAlias( $alias );
 335                 if ( $realName ) {
 336                         return self::getPage( $realName );
 337                 } else {
 338                         return NULL;
 339                 }
 340         }
 341
 342         /**
 343          * Return categorised listable special pages for all users
 344          * @static
 345          */
 346         static function getRegularPages() {
 347                 if ( !self::$mListInitialised ) {
 348                         self::initList();
 349                 }
 350                 $pages = array();
 351
 352                 foreach ( self::$mList as $name => $rec ) {
 353                         $page = self::getPage( $name );
 354                         if ( $page->isListed() && $page->getRestriction() == '' ) {
 355                                 $pages[$name] = $page;
 356                         }
 357                 }
 358                 return $pages;
 359         }
 360
 361         /**
 362          * Return categorised listable special pages which are available
 363          * for the current user, but not for everyone
 364          * @static
 365          */
 366         static function getRestrictedPages() {
 367                 global $wgUser;
 368                 if ( !self::$mListInitialised ) {
 369                         self::initList();
 370                 }
 371                 $pages = array();
 372
 373                 foreach ( self::$mList as $name => $rec ) {
 374                         $page = self::getPage( $name );
 375                         if ( $page->isListed() ) {
 376                                 $restriction = $page->getRestriction();
 377                                 if ( $restriction != '' && $wgUser->isAllowed( $restriction ) ) {
 378                                         $pages[$name] = $page;
 379                                 }
 380                         }
 381                 }
 382                 return $pages;
 383         }
 384
 385         /**
 386          * Execute a special page path.
 387          * The path     may contain parameters, e.g. Special:Name/Params
 388          * Extracts the special page name and call the execute method, passing the parameters
 389          *
 390          * Returns a title object if the page is redirected, false if there was no such special
 391          * page, and true if it was successful.
 392          *
 393          * @param $title          a title object
 394          * @param $including      output is being captured for use in {{special:whatever}}
 395          */
 396         static function executePath( &$title, $including = false ) {
 397                 global $wgOut, $wgTitle, $wgRequest;
 398                 wfProfileIn( __METHOD__ );
 399
 400                 # FIXME: redirects broken due to this call
 401                 $bits = explode( '/', $title->getDBkey(), 2 );
 402                 $name = $bits[0];
 403                 if( !isset( $bits[1] ) ) { // bug 2087
 404                         $par = NULL;
 405                 } else {
 406                         $par = $bits[1];
 407                 }
 408                 $page = SpecialPage::getPageByAlias( $name );
 409
 410                 # Nonexistent?
 411                 if ( !$page ) {
 412                         if ( !$including ) {
 413                                 $wgOut->setArticleRelated( false );
 414                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 415                                 $wgOut->setStatusCode( 404 );
 416                                 $wgOut->showErrorPage( 'nosuchspecialpage', 'nospecialpagetext' );
 417                         }
 418                         wfProfileOut( __METHOD__ );
 419                         return false;
 420                 }
 421
 422                 # Check for redirect
 423                 if ( !$including ) {
 424                         $redirect = $page->getRedirect( $par );
 425                         if ( $redirect ) {
 426                                 $query = $page->getRedirectQuery();
 427                                 $url = $redirect->getFullUrl( $query );
 428                                 $wgOut->redirect( $url );
 429                                 wfProfileOut( __METHOD__ );
 430                                 return $redirect;
 431                         }
 432                 }
 433
 434                 # Redirect to canonical alias for GET commands
 435                 # Not for POST, we'd lose the post data, so it's best to just distribute
 436                 # the request. Such POST requests are possible for old extensions that
 437                 # generate self-links without being aware that their default name has
 438                 # changed.
 439                 if ( !$including && $name != $page->getLocalName() && !$wgRequest->wasPosted() ) {
 440                         $query = $_GET;
 441                         unset( $query['title'] );
 442                         $query = wfArrayToCGI( $query );
 443                         $title = $page->getTitle( $par );
 444                         $url = $title->getFullUrl( $query );
 445                         $wgOut->redirect( $url );
 446                         wfProfileOut( __METHOD__ );
 447                         return $redirect;
 448                 }
 449
 450                 if ( $including && !$page->includable() ) {
 451                         wfProfileOut( __METHOD__ );
 452                         return false;
 453                 } elseif ( !$including ) {
 454                         $wgTitle = $page->getTitle();
 455                 }
 456                 $page->including( $including );
 457
 458                 // Execute special page
 459                 $profName = 'Special:' . $page->getName();
 460                 wfProfileIn( $profName );
 461                 $page->execute( $par );
 462                 wfProfileOut( $profName );
 463                 wfProfileOut( __METHOD__ );
 464                 return true;
 465         }
 466
 467         /**
 468          * Just like executePath() except it returns the HTML instead of outputting it
 469          * Returns false if there was no such special page, or a title object if it was
 470          * a redirect.
 471          * @static
 472          */
 473         static function capturePath( &$title ) {
 474                 global $wgOut, $wgTitle;
 475
 476                 $oldTitle = $wgTitle;
 477                 $oldOut = $wgOut;
 478                 $wgOut = new OutputPage;
 479
 480                 $ret = SpecialPage::executePath( $title, true );
 481                 if ( $ret === true ) {
 482                         $ret = $wgOut->getHTML();
 483                 }
 484                 $wgTitle = $oldTitle;
 485                 $wgOut = $oldOut;
 486                 return $ret;
 487         }
 488
 489         /**
 490          * Get the local name for a specified canonical name
 491          *
 492          * @param $name
 493          * @param mixed $subpage Boolean false, or string
 494          *
 495          * @return string
 496          */
 497         static function getLocalNameFor( $name, $subpage = false ) {
 498                 global $wgContLang;
 499                 $aliases = $wgContLang->getSpecialPageAliases();
 500                 if ( isset( $aliases[$name][0] ) ) {
 501                         $name = $aliases[$name][0];
 502                 }
 503                 if ( $subpage !== false && !is_null( $subpage ) ) {
 504                         $name = "$name/$subpage";
 505                 }
 506                 return $name;
 507         }
 508
 509         /**
 510          * Get a localised Title object for a specified special page name
 511          */
 512         static function getTitleFor( $name, $subpage = false ) {
 513                 $name = self::getLocalNameFor( $name, $subpage );
 514                 if ( $name ) {
 515                         return Title::makeTitle( NS_SPECIAL, $name );
 516                 } else {
 517                         throw new MWException( "Invalid special page name \"$name\"" );
 518                 }
 519         }
 520
 521         /**
 522          * Get a localised Title object for a page name with a possibly unvalidated subpage
 523          */
 524         static function getSafeTitleFor( $name, $subpage = false ) {
 525                 $name = self::getLocalNameFor( $name, $subpage );
 526                 if ( $name ) {
 527                         return Title::makeTitleSafe( NS_SPECIAL, $name );
 528                 } else {
 529                         return null;
 530                 }
 531         }
 532
 533         /**
 534          * Get a title for a given alias
 535          * @return Title or null if there is no such alias
 536          */
 537         static function getTitleForAlias( $alias ) {
 538                 $name = self::resolveAlias( $alias );
 539                 if ( $name ) {
 540                         return self::getTitleFor( $name );
 541                 } else {
 542                         return null;
 543                 }
 544         }
 545
 546         /**
 547          * Default constructor for special pages
 548          * Derivative classes should call this from their constructor
 549          *     Note that if the user does not have the required level, an error message will
 550          *     be displayed by the default execute() method, without the global function ever
 551          *     being called.
 552          *
 553          *     If you override execute(), you can recover the default behaviour with userCanExecute()
 554          *     and displayRestrictionError()
 555          *
 556          * @param string $name Name of the special page, as seen in links and URLs
 557          * @param string $restriction User right required, e.g. "block" or "delete"
 558          * @param boolean $listed Whether the page is listed in Special:Specialpages
 559          * @param string $function Function called by execute(). By default it is constructed from $name
 560          * @param string $file File which is included by execute(). It is also constructed from $name by default
 561          */
 562         function SpecialPage( $name = '', $restriction = '', $listed = true, $function = false, $file = 'default', $includable = false ) {
 563                 $this->mName = $name;
 564                 $this->mRestriction = $restriction;
 565                 $this->mListed = $listed;
 566                 $this->mIncludable = $includable;
 567                 if ( $function == false ) {
 568                         $this->mFunction = 'wfSpecial'.$name;
 569                 } else {
 570                         $this->mFunction = $function;
 571                 }
 572                 if ( $file === 'default' ) {
 573                         $this->mFile = dirname(__FILE__) . "/Special{$name}.php";
 574                 } else {
 575                         $this->mFile = $file;
 576                 }
 577         }
 578
 579         /**#@+
 580           * Accessor
 581           *
 582           * @deprecated
 583           */
 584         function getName() { return $this->mName; }
 585         function getRestriction() { return $this->mRestriction; }
 586         function getFile() { return $this->mFile; }
 587         function isListed() { return $this->mListed; }
 588         /**#@-*/
 589
 590         /**#@+
 591           * Accessor and mutator
 592           */
 593         function name( $x = NULL ) { return wfSetVar( $this->mName, $x ); }
 594         function restrictions( $x = NULL) { return wfSetVar( $this->mRestrictions, $x ); }
 595         function listed( $x = NULL) { return wfSetVar( $this->mListed, $x ); }
 596         function func( $x = NULL) { return wfSetVar( $this->mFunction, $x ); }
 597         function file( $x = NULL) { return wfSetVar( $this->mFile, $x ); }
 598         function includable( $x = NULL ) { return wfSetVar( $this->mIncludable, $x ); }
 599         function including( $x = NULL ) { return wfSetVar( $this->mIncluding, $x ); }
 600         /**#@-*/
 601
 602         /**
 603          * Get the localised name of the special page
 604          */
 605         function getLocalName() {
 606                 if ( !isset( $this->mLocalName ) ) {
 607                         $this->mLocalName = self::getLocalNameFor( $this->mName );
 608                 }
 609                 return $this->mLocalName;
 610         }
 611
 612         /**
 613          * Checks if the given user (identified by an object) can execute this
 614          * special page (as defined by $mRestriction)
 615          */
 616         function userCanExecute( &$user ) {
 617                 return $user->isAllowed( $this->mRestriction );
 618         }
 619
 620         /**
 621          * Output an error message telling the user what access level they have to have
 622          */
 623         function displayRestrictionError() {
 624                 global $wgOut;
 625                 $wgOut->permissionRequired( $this->mRestriction );
 626         }
 627
 628         /**
 629          * Sets headers - this should be called from the execute() method of all derived classes!
 630          */
 631         function setHeaders() {
 632                 global $wgOut;
 633                 $wgOut->setArticleRelated( false );
 634                 $wgOut->setRobotPolicy( "noindex,nofollow" );
 635                 $wgOut->setPageTitle( $this->getDescription() );
 636         }
 637
 638         /**
 639          * Default execute method
 640          * Checks user permissions, calls the function given in mFunction
 641          *
 642          * This may be overridden by subclasses.
 643          */
 644         function execute( $par ) {
 645                 global $wgUser;
 646
 647                 $this->setHeaders();
 648
 649                 if ( $this->userCanExecute( $wgUser ) ) {
 650                         $func = $this->mFunction;
 651                         // only load file if the function does not exist
 652                         if(!is_callable($func) and $this->mFile) {
 653                                 require_once( $this->mFile );
 654                         }
 655                         # FIXME: these hooks are broken for extensions and anything else that subclasses SpecialPage.
 656                         if ( wfRunHooks( 'SpecialPageExecuteBeforeHeader', array( &$this, &$par, &$func ) ) )
 657                                 $this->outputHeader();
 658                         if ( ! wfRunHooks( 'SpecialPageExecuteBeforePage', array( &$this, &$par, &$func ) ) )
 659                                 return;
 660                         call_user_func( $func, $par, $this );
 661                         if ( ! wfRunHooks( 'SpecialPageExecuteAfterPage', array( &$this, &$par, &$func ) ) )
 662                                 return;
 663                 } else {
 664                         $this->displayRestrictionError();
 665                 }
 666         }
 667
 668         function outputHeader() {
 669                 global $wgOut, $wgContLang;
 670
 671                 $msg = $wgContLang->lc( $this->name() ) . '-summary';
 672                 $out = wfMsg( $msg );
 673                 if ( ! wfEmptyMsg( $msg, $out ) and  $out !== '' and ! $this->including() )
 674                         $wgOut->addWikiText( $out );
 675
 676         }
 677
 678         # Returns the name that goes in the <h1> in the special page itself, and also the name that
 679         # will be listed in Special:Specialpages
 680         #
 681         # Derived classes can override this, but usually it is easier to keep the default behaviour.
 682         # Messages can be added at run-time, see MessageCache.php
 683         function getDescription() {
 684                 return wfMsg( strtolower( $this->mName ) );
 685         }
 686
 687         /**
 688          * Get a self-referential title object
 689          */
 690         function getTitle( $subpage = false) {
 691                 return self::getTitleFor( $this->mName, $subpage );
 692         }
 693
 694         /**
 695          * Set whether this page is listed in Special:Specialpages, at run-time
 696          */
 697         function setListed( $listed ) {
 698                 return wfSetVar( $this->mListed, $listed );
 699         }
 700
 701         /**
 702          * If the special page is a redirect, then get the Title object it redirects to.
 703          * False otherwise.
 704          */
 705         function getRedirect( $subpage ) {
 706                 return false;
 707         }
 708
 709         /**
 710          * Return part of the request string for a special redirect page
 711          * This allows passing, e.g. action=history to Special:Mypage, etc.
 712          *
 713          * @return string
 714          */
 715         function getRedirectQuery() {
 716                 global $wgRequest;
 717                 $params = array();
 718                 foreach( $this->mAllowedRedirectParams as $arg ) {
 719                         if( $val = $wgRequest->getVal( $arg, false ) )
 720                                 $params[] = $arg . '=' . $val;
 721                 }
 722
 723                 return count( $params ) ? implode( '&', $params ) : false;
 724         }
 725 }
 726
 727 /**
 728  * Shortcut to construct a special page which is unlisted by default
 729  * @addtogroup SpecialPage
 730  */
 731 class UnlistedSpecialPage extends SpecialPage
 732 {
 733         function UnlistedSpecialPage( $name, $restriction = '', $function = false, $file = 'default' ) {
 734                 SpecialPage::SpecialPage( $name, $restriction, false, $function, $file );
 735         }
 736 }
 737
 738 /**
 739  * Shortcut to construct an includable special  page
 740  * @addtogroup SpecialPage
 741  */
 742 class IncludableSpecialPage extends SpecialPage
 743 {
 744         function IncludableSpecialPage( $name, $restriction = '', $listed = true, $function = false, $file = 'default' ) {
 745                 SpecialPage::SpecialPage( $name, $restriction, $listed, $function, $file, true );
 746         }
 747 }
 748
 749 /**
 750  * Shortcut to construct a special page alias.
 751  * @addtogroup SpecialPage
 752  */
 753 class SpecialRedirectToSpecial extends UnlistedSpecialPage {
 754         var $redirName, $redirSubpage;
 755
 756         function __construct( $name, $redirName, $redirSubpage = false, $redirectParams = array() ) {
 757                 parent::__construct( $name );
 758                 $this->redirName = $redirName;
 759                 $this->redirSubpage = $redirSubpage;
 760                 $this->mAllowedRedirectParams = $redirectParams;
 761         }
 762
 763         function getRedirect( $subpage ) {
 764                 if ( $this->redirSubpage === false ) {
 765                         return SpecialPage::getTitleFor( $this->redirName, $subpage );
 766                 } else {
 767                         return SpecialPage::getTitleFor( $this->redirName, $this->redirSubpage );
 768                 }
 769         }
 770 }
 771
 772 /** SpecialMypage, SpecialMytalk and SpecialMycontributions special pages
 773  * are used to get user independant links pointing to the user page, talk
 774  * page and list of contributions.
 775  * This can let us cache a single copy of any generated content for all
 776  * users.
 777  */
 778
 779 /**
 780  * Shortcut to construct a special page pointing to current user user's page.
 781  * @addtogroup SpecialPage
 782  */
 783 class SpecialMypage extends UnlistedSpecialPage {
 784         function __construct() {
 785                 parent::__construct( 'Mypage' );
 786                 $this->mAllowedRedirectParams = array( 'action' , 'preload' , 'editintro' );
 787         }
 788
 789         function getRedirect( $subpage ) {
 790                 global $wgUser;
 791                 if ( strval( $subpage ) !== '' ) {
 792                         return Title::makeTitle( NS_USER, $wgUser->getName() . '/' . $subpage );
 793                 } else {
 794                         return Title::makeTitle( NS_USER, $wgUser->getName() );
 795                 }
 796         }
 797 }
 798
 799 /**
 800  * Shortcut to construct a special page pointing to current user talk page.
 801  * @addtogroup SpecialPage
 802  */
 803 class SpecialMytalk extends UnlistedSpecialPage {
 804         function __construct() {
 805                 parent::__construct( 'Mytalk' );
 806                 $this->mAllowedRedirectParams = array( 'action' , 'preload' , 'editintro' );
 807         }
 808
 809         function getRedirect( $subpage ) {
 810                 global $wgUser;
 811                 if ( strval( $subpage ) !== '' ) {
 812                         return Title::makeTitle( NS_USER_TALK, $wgUser->getName() . '/' . $subpage );
 813                 } else {
 814                         return Title::makeTitle( NS_USER_TALK, $wgUser->getName() );
 815                 }
 816         }
 817 }
 818
 819 /**
 820  * Shortcut to construct a special page pointing to current user contributions.
 821  * @addtogroup SpecialPage
 822  */
 823 class SpecialMycontributions extends UnlistedSpecialPage {
 824         function __construct() {
 825                 parent::__construct(  'Mycontributions' );
 826         }
 827
 828         function getRedirect( $subpage ) {
 829                 global $wgUser;
 830                 return SpecialPage::getTitleFor( 'Contributions', $wgUser->getName() );
 831         }
 832 }