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', 'deletedhistory' ),
  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         'Unwatchedpages' => new SpecialPage( 'Unwatchedpages', 'unwatchedpages' ),
  80         'Listredirects' => new SpecialPage( 'Listredirects' ),
  81         'Revisiondelete' => new SpecialPage( 'Revisiondelete', 'deleterevision' ),
  82         'Unusedtemplates' => new SpecialPage( 'Unusedtemplates' ),
  83 );
  84
  85 if( !$wgDisableCounters ) {
  86         $wgSpecialPages['Popularpages'] = new SpecialPage( 'Popularpages' );
  87 }
  88
  89 if( !$wgDisableInternalSearch ) {
  90         $wgSpecialPages['Search'] = new SpecialPage( 'Search' );
  91 }
  92
  93 if( $wgEmailAuthentication ) {
  94         $wgSpecialPages['Confirmemail'] = new UnlistedSpecialPage( 'Confirmemail' );
  95 }
  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
 185                 $redirects = array(
 186                         'Mypage' => Title::makeTitle( NS_USER, $wgUser->getName() ),
 187                         'Mytalk' => Title::makeTitle( NS_USER_TALK, $wgUser->getName() ),
 188                         'Mycontributions' => Title::makeTitle( NS_SPECIAL, 'Contributions/' . $wgUser->getName() ),
 189                         'Listadmins' => Title::makeTitle( NS_SPECIAL, 'Listusers/sysop' ), # @bug 2832
 190                         'Randompage' => Title::makeTitle( NS_SPECIAL, 'Random' )
 191                 );
 192                 wfRunHooks( 'SpecialPageGetRedirect', array( &$redirects ) );
 193
 194                 return isset( $redirects[$name] ) ? $redirects[$name] : null;
 195         }
 196
 197         /**
 198          * Return categorised listable special pages
 199          * Returns a 2d array where the first index is the restriction name
 200          * @static
 201          */
 202         function getPages() {
 203                 global $wgSpecialPages;
 204                 $pages = array(
 205                   '' => array(),
 206                   'sysop' => array(),
 207                   'developer' => array()
 208                 );
 209
 210                 foreach ( $wgSpecialPages as $name => $page ) {
 211                         if ( $page->isListed() ) {
 212                                 $pages[$page->getRestriction()][$page->getName()] =& $wgSpecialPages[$name];
 213                         }
 214                 }
 215                 return $pages;
 216         }
 217
 218         /**
 219          * Execute a special page path.
 220          * The path     may contain parameters, e.g. Special:Name/Params
 221          * Extracts the special page name and call the execute method, passing the parameters
 222          *
 223          * Returns a title object if the page is redirected, false if there was no such special
 224          * page, and true if it was successful.
 225          *
 226          * @param $title          a title object
 227          * @param $including      output is being captured for use in {{special:whatever}}
 228          */
 229         function executePath( &$title, $including = false ) {
 230                 global $wgOut, $wgTitle;
 231                 $fname = 'SpecialPage::executePath';
 232                 wfProfileIn( $fname );
 233
 234                 $bits = split( "/", $title->getDBkey(), 2 );
 235                 $name = $bits[0];
 236                 if( !isset( $bits[1] ) ) { // bug 2087
 237                         $par = NULL;
 238                 } else {
 239                         $par = $bits[1];
 240                 }
 241
 242                 $page = SpecialPage::getPage( $name );
 243                 if ( is_null( $page ) ) {
 244                         if ( $including ) {
 245                                 wfProfileOut( $fname );
 246                                 return false;
 247                         } else {
 248                                 $redir = SpecialPage::getRedirect( $name );
 249                                 if ( isset( $redir ) ) {
 250                                         if ( isset( $par ) )
 251                                                 $wgOut->redirect( $redir->getFullURL() . '/' . $par );
 252                                         else
 253                                                 $wgOut->redirect( $redir->getFullURL() );
 254                                         $retVal = $redir;
 255                                 } else {
 256                                         $wgOut->setArticleRelated( false );
 257                                         $wgOut->setRobotpolicy( 'noindex,follow' );
 258                                         $wgOut->setStatusCode( 404 );
 259                                         $wgOut->errorpage( 'nosuchspecialpage', 'nospecialpagetext' );
 260                                         $retVal = false;
 261                                 }
 262                         }
 263                 } else {
 264                         if ( $including && !$page->includable() ) {
 265                                 wfProfileOut( $fname );
 266                                 return false;
 267                         }
 268                         if($par !== NULL) {
 269                                 $wgTitle = Title::makeTitle( NS_SPECIAL, $name );
 270                         } else {
 271                                 $wgTitle = $title;
 272                         }
 273                         $page->including( $including );
 274
 275                         $profName = 'Special:' . $page->getName();
 276                         wfProfileIn( $profName );
 277                         $page->execute( $par );
 278                         wfProfileOut( $profName );
 279                         $retVal = true;
 280                 }
 281                 wfProfileOut( $fname );
 282                 return $retVal;
 283         }
 284
 285         /**
 286          * Just like executePath() except it returns the HTML instead of outputting it
 287          * Returns false if there was no such special page, or a title object if it was
 288          * a redirect.
 289          * @static
 290          */
 291         function capturePath( &$title ) {
 292                 global $wgOut, $wgTitle;
 293
 294                 $oldTitle = $wgTitle;
 295                 $oldOut = $wgOut;
 296                 $wgOut = new OutputPage;
 297
 298                 $ret = SpecialPage::executePath( $title, true );
 299                 if ( $ret === true ) {
 300                         $ret = $wgOut->getHTML();
 301                 }
 302                 $wgTitle = $oldTitle;
 303                 $wgOut = $oldOut;
 304                 return $ret;
 305         }
 306
 307         /**
 308          * Default constructor for special pages
 309          * Derivative classes should call this from their constructor
 310          *     Note that if the user does not have the required level, an error message will
 311          *     be displayed by the default execute() method, without the global function ever
 312          *     being called.
 313          *
 314          *     If you override execute(), you can recover the default behaviour with userCanExecute()
 315          *     and displayRestrictionError()
 316          *
 317          * @param string $name Name of the special page, as seen in links and URLs
 318          * @param string $restriction Minimum user level required, e.g. "sysop" or "developer".
 319          * @param boolean $listed Whether the page is listed in Special:Specialpages
 320          * @param string $function Function called by execute(). By default it is constructed from $name
 321          * @param string $file File which is included by execute(). It is also constructed from $name by default
 322          */
 323         function SpecialPage( $name = '', $restriction = '', $listed = true, $function = false, $file = 'default', $includable = false ) {
 324                 $this->mName = $name;
 325                 $this->mRestriction = $restriction;
 326                 $this->mListed = $listed;
 327                 $this->mIncludable = $includable;
 328                 if ( $function == false ) {
 329                         $this->mFunction = 'wfSpecial'.$name;
 330                 } else {
 331                         $this->mFunction = $function;
 332                 }
 333                 if ( $file === 'default' ) {
 334                         $this->mFile = "Special{$name}.php";
 335                 } else {
 336                         $this->mFile = $file;
 337                 }
 338         }
 339
 340         /**#@+
 341           * Accessor
 342           *
 343           * @deprecated
 344           */
 345         function getName() { return $this->mName; }
 346         function getRestriction() { return $this->mRestriction; }
 347         function getFile() { return $this->mFile; }
 348         function isListed() { return $this->mListed; }
 349         /**#@-*/
 350
 351         /**#@+
 352           * Accessor and mutator
 353           */
 354         function name( $x = NULL ) { return wfSetVar( $this->mName, $x ); }
 355         function restrictions( $x = NULL) { return wfSetVar( $this->mRestrictions, $x ); }
 356         function listed( $x = NULL) { return wfSetVar( $this->mListed, $x ); }
 357         function func( $x = NULL) { return wfSetVar( $this->mFunction, $x ); }
 358         function file( $x = NULL) { return wfSetVar( $this->mFile, $x ); }
 359         function includable( $x = NULL ) { return wfSetVar( $this->mIncludable, $x ); }
 360         function including( $x = NULL ) { return wfSetVar( $this->mIncluding, $x ); }
 361         /**#@-*/
 362
 363         /**
 364          * Checks if the given user (identified by an object) can execute this
 365          * special page (as defined by $mRestriction)
 366          */
 367         function userCanExecute( &$user ) {
 368                 if ( $this->mRestriction == "" ) {
 369                         return true;
 370                 } else {
 371                         if ( in_array( $this->mRestriction, $user->getRights() ) ) {
 372                                 return true;
 373                         } else {
 374                                 return false;
 375                         }
 376                 }
 377         }
 378
 379         /**
 380          * Output an error message telling the user what access level they have to have
 381          */
 382         function displayRestrictionError() {
 383                 global $wgOut;
 384                 $wgOut->permissionRequired( $this->mRestriction );
 385         }
 386
 387         /**
 388          * Sets headers - this should be called from the execute() method of all derived classes!
 389          */
 390         function setHeaders() {
 391                 global $wgOut;
 392                 $wgOut->setArticleRelated( false );
 393                 $wgOut->setRobotPolicy( "noindex,follow" );
 394                 $wgOut->setPageTitle( $this->getDescription() );
 395         }
 396
 397         /**
 398          * Default execute method
 399          * Checks user permissions, calls the function given in mFunction
 400          */
 401         function execute( $par ) {
 402                 global $wgUser;
 403
 404                 $this->setHeaders();
 405
 406                 if ( $this->userCanExecute( $wgUser ) ) {
 407                         $func = $this->mFunction;
 408                         // only load file if the function does not exist
 409                         if(!function_exists($func) and $this->mFile) {
 410                                 require_once( $this->mFile );
 411                         }
 412                         if ( wfRunHooks( 'SpecialPageExecuteBeforeHeader', array( &$this, &$par, &$func ) ) )
 413                                 $this->outputHeader();
 414                         if ( ! wfRunHooks( 'SpecialPageExecuteBeforePage', array( &$this, &$par, &$func ) ) )
 415                                 return;
 416                         $func( $par, $this );
 417                         if ( ! wfRunHooks( 'SpecialPageExecuteAfterPage', array( &$this, &$par, &$func ) ) )
 418                                 return;
 419                 } else {
 420                         $this->displayRestrictionError();
 421                 }
 422         }
 423
 424         function outputHeader() {
 425                 global $wgOut, $wgContLang;
 426
 427                 $msg = $wgContLang->lc( $this->name() ) . '-summary';
 428                 $out = wfMsg( $msg );
 429                 if ( ! wfEmptyMsg( $msg, $out ) and  $out !== '' and ! $this->including() )
 430                         $wgOut->addWikiText( $out );
 431
 432         }
 433
 434         # Returns the name that goes in the <h1> in the special page itself, and also the name that
 435         # will be listed in Special:Specialpages
 436         #
 437         # Derived classes can override this, but usually it is easier to keep the default behaviour.
 438         # Messages can be added at run-time, see MessageCache.php
 439         function getDescription() {
 440                 return wfMsg( strtolower( $this->mName ) );
 441         }
 442
 443         /**
 444          * Get a self-referential title object
 445          */
 446         function getTitle() {
 447                 return Title::makeTitle( NS_SPECIAL, $this->mName );
 448         }
 449
 450         /**
 451          * Set whether this page is listed in Special:Specialpages, at run-time
 452          */
 453         function setListed( $listed ) {
 454                 return wfSetVar( $this->mListed, $listed );
 455         }
 456
 457 }
 458
 459 /**
 460  * Shortcut to construct a special page which is unlisted by default
 461  * @package MediaWiki
 462  */
 463 class UnlistedSpecialPage extends SpecialPage
 464 {
 465         function UnlistedSpecialPage( $name, $restriction = '', $function = false, $file = 'default' ) {
 466                 SpecialPage::SpecialPage( $name, $restriction, false, $function, $file );
 467         }
 468 }
 469
 470 /**
 471  * Shortcut to construct an includable special  page
 472  * @package MediaWiki
 473  */
 474 class IncludableSpecialPage extends SpecialPage
 475 {
 476         function IncludableSpecialPage( $name, $restriction = '', $listed = true, $function = false, $file = 'default' ) {
 477                 SpecialPage::SpecialPage( $name, $restriction, $listed, $function, $file, true );
 478         }
 479 }
 480 ?>