includes/SpecialPage.php

   1 <?php
   2 /**
   3  * SpecialPage: handling special pages and lists thereof
   4  * $wgSpecialPages is a list of all SpecialPage objects. These objects are
   5  * either instances of SpecialPage or a sub-class thereof. They have an
   6  * execute() method, which sends the HTML for the special page to $wgOut.
   7  * The parent class has an execute() method which distributes the call to
   8  * the historical global functions. Additionally, execute() also checks if the
   9  * user has the necessary access privileges and bails out if not.
  10  *
  11  * To add a special page at run-time, use SpecialPage::addPage().
  12  * DO NOT manipulate this array at run-time.
  13  *
  14  * @package MediaWiki
  15  * @subpackage SpecialPage
  16  */
  17
  18
  19 /**
  20  * @access private
  21  */
  22 $wgSpecialPages = array(
  23         'DoubleRedirects'       => new SpecialPage ( 'DoubleRedirects' ),
  24         'BrokenRedirects'       => new SpecialPage ( 'BrokenRedirects' ),
  25         'Disambiguations'       => new SpecialPage ( 'Disambiguations' ),
  26
  27         'Userlogin'         => new SpecialPage( 'Userlogin' ),
  28         'Userlogout'        => new UnlistedSpecialPage( 'Userlogout' ),
  29         'Preferences'       => new SpecialPage( 'Preferences' ),
  30         'Watchlist'         => new SpecialPage( 'Watchlist' ),
  31
  32         'Recentchanges'     => new IncludableSpecialPage( 'Recentchanges' ),
  33         'Upload'            => new SpecialPage( 'Upload' ),
  34         'Imagelist'         => new SpecialPage( 'Imagelist' ),
  35         'Newimages'         => new IncludableSpecialPage( 'Newimages' ),
  36         'Listusers'         => new SpecialPage( 'Listusers' ),
  37         'Statistics'        => new SpecialPage( 'Statistics' ),
  38         'Random'        => new SpecialPage( 'Randompage' ),
  39         'Lonelypages'       => new SpecialPage( 'Lonelypages' ),
  40         'Uncategorizedpages'=> new SpecialPage( 'Uncategorizedpages' ),
  41         'Uncategorizedcategories'=> new SpecialPage( 'Uncategorizedcategories' ),
  42         'Unusedcategories'      => new SpecialPage( 'Unusedcategories' ),
  43         'Unusedimages'      => new SpecialPage( 'Unusedimages' ),
  44         'Wantedpages'   => new IncludableSpecialPage( 'Wantedpages' ),
  45         'Wantedcategories' => new SpecialPage( 'Wantedcategories' ),
  46         'Mostlinked'    => new SpecialPage( 'Mostlinked' ),
  47         'Mostlinkedcategories' => new SpecialPage( 'Mostlinkedcategories' ),
  48         'Mostcategories' => new SpecialPage( 'Mostcategories' ),
  49         'Mostimages' => new SpecialPage( 'Mostimages' ),
  50         'Mostrevisions' => new SpecialPage( 'Mostrevisions' ),
  51         'Shortpages'    => new SpecialPage( 'Shortpages' ),
  52         'Longpages'             => new SpecialPage( 'Longpages' ),
  53         'Newpages'              => new IncludableSpecialPage( 'Newpages' ),
  54         'Ancientpages'  => new SpecialPage( 'Ancientpages' ),
  55         'Deadendpages'  => new SpecialPage( 'Deadendpages' ),
  56         'Allpages'              => new IncludableSpecialPage( 'Allpages' ),
  57         'Prefixindex'   => new IncludableSpecialPage( 'Prefixindex' ) ,
  58         'Ipblocklist'   => new SpecialPage( 'Ipblocklist' ),
  59         'Specialpages'  => new UnlistedSpecialPage( 'Specialpages' ),
  60         'Contributions' => new UnlistedSpecialPage( 'Contributions' ),
  61         'Emailuser'             => new UnlistedSpecialPage( 'Emailuser' ),
  62         'Whatlinkshere' => new UnlistedSpecialPage( 'Whatlinkshere' ),
  63         'Recentchangeslinked' => new UnlistedSpecialPage( 'Recentchangeslinked' ),
  64         'Movepage'              => new UnlistedSpecialPage( 'Movepage' ),
  65         'Blockme'       => new UnlistedSpecialPage( 'Blockme' ),
  66         'Booksources'   => new SpecialPage( 'Booksources' ),
  67         'Categories'    => new SpecialPage( 'Categories' ),
  68         'Export'                => new SpecialPage( 'Export' ),
  69         'Version'               => new SpecialPage( 'Version' ),
  70         'Allmessages'   => new SpecialPage( 'Allmessages' ),
  71         'Log'           => new SpecialPage( 'Log' ),
  72         'Blockip'               => new SpecialPage( 'Blockip', 'block' ),
  73         'Undelete'              => new SpecialPage( 'Undelete' ),
  74         "Import"                => new SpecialPage( "Import", 'import' ),
  75         'Lockdb'                => new SpecialPage( 'Lockdb', 'siteadmin' ),
  76         'Unlockdb'              => new SpecialPage( 'Unlockdb', 'siteadmin' ),
  77         'Userrights'    => new SpecialPage( 'Userrights', 'userrights' ),
  78         'MIMEsearch'    => new SpecialPage( 'MIMEsearch' ),
  79 );
  80
  81 if ( $wgUseValidation )
  82         $wgSpecialPages['Validate'] = new SpecialPage( 'Validate' );
  83
  84 if( !$wgDisableCounters ) {
  85         $wgSpecialPages['Popularpages'] = new SpecialPage( 'Popularpages' );
  86 }
  87
  88 if( !$wgDisableInternalSearch ) {
  89         $wgSpecialPages['Search'] = new SpecialPage( 'Search' );
  90 }
  91
  92 if( $wgEmailAuthentication ) {
  93         $wgSpecialPages['Confirmemail'] = new UnlistedSpecialPage( 'Confirmemail' );
  94 }
  95
  96 if ( $wgEnableUnwatchedpages )
  97          $wgSpecialPages['Unwatchedpages'] = new SpecialPage( 'Unwatchedpages' );
  98
  99 /**
 100  * Parent special page class, also static functions for handling the special
 101  * page list
 102  * @package MediaWiki
 103  */
 104 class SpecialPage
 105 {
 106         /**#@+
 107          * @access private
 108          */
 109         /**
 110          * The name of the class, used in the URL.
 111          * Also used for the default <h1> heading, @see getDescription()
 112          */
 113         var $mName;
 114         /**
 115          * Minimum user level required to access this page, or "" for anyone.
 116          * Also used to categorise the pages in Special:Specialpages
 117          */
 118         var $mRestriction;
 119         /**
 120          * Listed in Special:Specialpages?
 121          */
 122         var $mListed;
 123         /**
 124          * Function name called by the default execute()
 125          */
 126         var $mFunction;
 127         /**
 128          * File which needs to be included before the function above can be called
 129          */
 130         var $mFile;
 131         /**
 132          * Whether or not this special page is being included from an article
 133          */
 134         var $mIncluding;
 135         /**
 136          * Whether the special page can be included in an article
 137          */
 138         var $mIncludable;
 139
 140
 141         /**#@-*/
 142
 143
 144         /**
 145          * Add a page to the list of valid special pages
 146          * $obj->execute() must send HTML to $wgOut then return
 147          * Use this for a special page extension
 148          * @static
 149          */
 150         function addPage( &$obj ) {
 151                 global $wgSpecialPages;
 152                 $wgSpecialPages[$obj->mName] = $obj;
 153         }
 154
 155         /**
 156          * Remove a special page from the list
 157          * Occasionally used to disable expensive or dangerous special pages
 158          * @static
 159          */
 160         function removePage( $name ) {
 161                 global $wgSpecialPages;
 162                 unset( $wgSpecialPages[$name] );
 163         }
 164
 165         /**
 166          * Find the object with a given name and return it (or NULL)
 167          * @static
 168          * @param string $name
 169          */
 170         function getPage( $name ) {
 171                 global $wgSpecialPages;
 172                 if ( array_key_exists( $name, $wgSpecialPages ) ) {
 173                         return $wgSpecialPages[$name];
 174                 } else {
 175                         return NULL;
 176                 }
 177         }
 178
 179         /**
 180          * @static
 181          * @param string $name
 182          * @return mixed Title object if the redirect exists, otherwise NULL
 183          */
 184         function getRedirect( $name ) {
 185                 global $wgUser;
 186
 187                 $redirects = array(
 188                         'Mypage' => Title::makeTitle( NS_USER, $wgUser->getName() ),
 189                         'Mytalk' => Title::makeTitle( NS_USER_TALK, $wgUser->getName() ),
 190                         'Mycontributions' => Title::makeTitle( NS_SPECIAL, 'Contributions/' . $wgUser->getName() ),
 191                         'Listadmins' => Title::makeTitle( NS_SPECIAL, 'Listusers/sysop' ), # @bug 2832
 192                         'Randompage' => Title::makeTitle( NS_SPECIAL, 'Random' )
 193                 );
 194                 wfRunHooks( 'SpecialPageGetRedirect', array( &$redirects ) );
 195
 196                 return isset( $redirects[$name] ) ? $redirects[$name] : null;
 197         }
 198
 199         /**
 200          * Return categorised listable special pages
 201          * Returns a 2d array where the first index is the restriction name
 202          * @static
 203          */
 204         function getPages() {
 205                 global $wgSpecialPages;
 206                 $pages = array(
 207                   '' => array(),
 208                   'sysop' => array(),
 209                   'developer' => array()
 210                 );
 211
 212                 foreach ( $wgSpecialPages as $name => $page ) {
 213                         if ( $page->isListed() ) {
 214                                 $pages[$page->getRestriction()][$page->getName()] =& $wgSpecialPages[$name];
 215                         }
 216                 }
 217                 return $pages;
 218         }
 219
 220         /**
 221          * Execute a special page path.
 222          * The path     may contain parameters, e.g. Special:Name/Params
 223          * Extracts the special page name and call the execute method, passing the parameters
 224          *
 225          * Returns a title object if the page is redirected, false if there was no such special
 226          * page, and true if it was successful.
 227          *
 228          * @param $title          a title object
 229          * @param $including      output is being captured for use in {{special:whatever}}
 230          */
 231         function executePath( &$title, $including = false ) {
 232                 global $wgSpecialPages, $wgOut, $wgTitle;
 233                 $fname = 'SpecialPage::executePath';
 234                 wfProfileIn( $fname );
 235
 236                 $bits = split( "/", $title->getDBkey(), 2 );
 237                 $name = $bits[0];
 238                 if( !isset( $bits[1] ) ) { // bug 2087
 239                         $par = NULL;
 240                 } else {
 241                         $par = $bits[1];
 242                 }
 243
 244                 $page = SpecialPage::getPage( $name );
 245                 if ( is_null( $page ) ) {
 246                         if ( $including ) {
 247                                 wfProfileOut( $fname );
 248                                 return false;
 249                         } else {
 250                                 $redir = SpecialPage::getRedirect( $name );
 251                                 if ( isset( $redir ) ) {
 252                                         if ( isset( $par ) )
 253                                                 $wgOut->redirect( $redir->getFullURL() . '/' . $par );
 254                                         else
 255                                                 $wgOut->redirect( $redir->getFullURL() );
 256                                         $retVal = $redir;
 257                                 } else {
 258                                         $wgOut->setArticleRelated( false );
 259                                         $wgOut->setRobotpolicy( 'noindex,follow' );
 260                                         $wgOut->setStatusCode( 404 );
 261                                         $wgOut->errorpage( 'nosuchspecialpage', 'nospecialpagetext' );
 262                                         $retVal = false;
 263                                 }
 264                         }
 265                 } else {
 266                         if ( $including && !$page->includable() ) {
 267                                 wfProfileOut( $fname );
 268                                 return false;
 269                         }
 270                         if($par !== NULL) {
 271                                 $wgTitle = Title::makeTitle( NS_SPECIAL, $name );
 272                         } else {
 273                                 $wgTitle = $title;
 274                         }
 275                         $page->including( $including );
 276
 277                         $profName = 'Special:' . $page->getName();
 278                         wfProfileIn( $profName );
 279                         $page->execute( $par );
 280                         wfProfileOut( $profName );
 281                         $retVal = true;
 282                 }
 283                 wfProfileOut( $fname );
 284                 return $retVal;
 285         }
 286
 287         /**
 288          * Just like executePath() except it returns the HTML instead of outputting it
 289          * Returns false if there was no such special page, or a title object if it was
 290          * a redirect.
 291          * @static
 292          */
 293         function capturePath( &$title ) {
 294                 global $wgOut, $wgTitle;
 295
 296                 $oldTitle = $wgTitle;
 297                 $oldOut = $wgOut;
 298                 $wgOut = new OutputPage;
 299
 300                 $ret = SpecialPage::executePath( $title, true );
 301                 if ( $ret === true ) {
 302                         $ret = $wgOut->getHTML();
 303                 }
 304                 $wgTitle = $oldTitle;
 305                 $wgOut = $oldOut;
 306                 return $ret;
 307         }
 308
 309         /**
 310          * Default constructor for special pages
 311          * Derivative classes should call this from their constructor
 312          *     Note that if the user does not have the required level, an error message will
 313          *     be displayed by the default execute() method, without the global function ever
 314          *     being called.
 315          *
 316          *     If you override execute(), you can recover the default behaviour with userCanExecute()
 317          *     and displayRestrictionError()
 318          *
 319          * @param string $name Name of the special page, as seen in links and URLs
 320          * @param string $restriction Minimum user level required, e.g. "sysop" or "developer".
 321          * @param boolean $listed Whether the page is listed in Special:Specialpages
 322          * @param string $function Function called by execute(). By default it is constructed from $name
 323          * @param string $file File which is included by execute(). It is also constructed from $name by default
 324          */
 325         function SpecialPage( $name = '', $restriction = '', $listed = true, $function = false, $file = 'default', $includable = false ) {
 326                 $this->mName = $name;
 327                 $this->mRestriction = $restriction;
 328                 $this->mListed = $listed;
 329                 $this->mIncludable = $includable;
 330                 if ( $function == false ) {
 331                         $this->mFunction = 'wfSpecial'.$name;
 332                 } else {
 333                         $this->mFunction = $function;
 334                 }
 335                 if ( $file === 'default' ) {
 336                         $this->mFile = "Special{$name}.php";
 337                 } else {
 338                         $this->mFile = $file;
 339                 }
 340         }
 341
 342         /**#@+
 343           * Accessor
 344           *
 345           * @deprecated
 346           */
 347         function getName() { return $this->mName; }
 348         function getRestriction() { return $this->mRestriction; }
 349         function getFile() { return $this->mFile; }
 350         function isListed() { return $this->mListed; }
 351         /**#@-*/
 352
 353         /**#@+
 354           * Accessor and mutator
 355           */
 356         function name( $x = NULL ) { return wfSetVar( $this->mName, $x ); }
 357         function restrictions( $x = NULL) { return wfSetVar( $this->mRestrictions, $x ); }
 358         function listed( $x = NULL) { return wfSetVar( $this->mListed, $x ); }
 359         function func( $x = NULL) { return wfSetVar( $this->mFunction, $x ); }
 360         function file( $x = NULL) { return wfSetVar( $this->mFile, $x ); }
 361         function includable( $x = NULL ) { return wfSetVar( $this->mIncludable, $x ); }
 362         function including( $x = NULL ) { return wfSetVar( $this->mIncluding, $x ); }
 363         /**#@-*/
 364
 365         /**
 366          * Checks if the given user (identified by an object) can execute this
 367          * special page (as defined by $mRestriction)
 368          */
 369         function userCanExecute( &$user ) {
 370                 if ( $this->mRestriction == "" ) {
 371                         return true;
 372                 } else {
 373                         if ( in_array( $this->mRestriction, $user->getRights() ) ) {
 374                                 return true;
 375                         } else {
 376                                 return false;
 377                         }
 378                 }
 379         }
 380
 381         /**
 382          * Output an error message telling the user what access level they have to have
 383          */
 384         function displayRestrictionError() {
 385                 global $wgOut;
 386                 $wgOut->permissionRequired( $this->mRestriction );
 387         }
 388
 389         /**
 390          * Sets headers - this should be called from the execute() method of all derived classes!
 391          */
 392         function setHeaders() {
 393                 global $wgOut;
 394                 $wgOut->setArticleRelated( false );
 395                 $wgOut->setRobotPolicy( "noindex,follow" );
 396                 $wgOut->setPageTitle( $this->getDescription() );
 397         }
 398
 399         /**
 400          * Default execute method
 401          * Checks user permissions, calls the function given in mFunction
 402          */
 403         function execute( $par ) {
 404                 global $wgUser, $wgOut, $wgTitle;
 405
 406                 $this->setHeaders();
 407
 408                 if ( $this->userCanExecute( $wgUser ) ) {
 409                         $func = $this->mFunction;
 410                         // only load file if the function does not exist
 411                         if(!function_exists($func) and $this->mFile) {
 412                                 require_once( $this->mFile );
 413                         }
 414                         $this->outputHeader();
 415                         $func( $par, $this );
 416                 } else {
 417                         $this->displayRestrictionError();
 418                 }
 419         }
 420
 421         function outputHeader() {
 422                 global $wgOut, $wgContLang;
 423
 424                 $msg = $wgContLang->lc( $this->name() ) . '-summary';
 425                 $out = wfMsg( $msg );
 426                 if ( ! wfEmptyMsg( $msg, $out ) and  $out !== '' and ! $this->including() )
 427                         $wgOut->addWikiText( $out );
 428
 429         }
 430
 431         # Returns the name that goes in the <h1> in the special page itself, and also the name that
 432         # will be listed in Special:Specialpages
 433         #
 434         # Derived classes can override this, but usually it is easier to keep the default behaviour.
 435         # Messages can be added at run-time, see MessageCache.php
 436         function getDescription() {
 437                 return wfMsg( strtolower( $this->mName ) );
 438         }
 439
 440         /**
 441          * Get a self-referential title object
 442          */
 443         function getTitle() {
 444                 return Title::makeTitle( NS_SPECIAL, $this->mName );
 445         }
 446
 447         /**
 448          * Set whether this page is listed in Special:Specialpages, at run-time
 449          */
 450         function setListed( $listed ) {
 451                 return wfSetVar( $this->mListed, $listed );
 452         }
 453
 454 }
 455
 456 /**
 457  * Shortcut to construct a special page which is unlisted by default
 458  * @package MediaWiki
 459  */
 460 class UnlistedSpecialPage extends SpecialPage
 461 {
 462         function UnlistedSpecialPage( $name, $restriction = '', $function = false, $file = 'default' ) {
 463                 SpecialPage::SpecialPage( $name, $restriction, false, $function, $file );
 464         }
 465 }
 466
 467 /**
 468  * Shortcut to construct an includable special  page
 469  * @package MediaWiki
 470  */
 471 class IncludableSpecialPage extends SpecialPage
 472 {
 473         function IncludableSpecialPage( $name, $restriction = '', $listed = true, $function = false, $file = 'default' ) {
 474                 SpecialPage::SpecialPage( $name, $restriction, $listed, $function, $file, true );
 475         }
 476 }
 477 ?>