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