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  *
  21  */
  22 global $wgSpecialPages, $wgUser;
  23
  24 /**
  25  * @access private
  26  */
  27 $wgSpecialPages = array(
  28         'DoubleRedirects'       => new SpecialPage ( 'DoubleRedirects' ),
  29         'BrokenRedirects'       => new SpecialPage ( 'BrokenRedirects' ),
  30         'Disambiguations'       => new SpecialPage ( 'Disambiguations' ),
  31
  32         'Userlogin'         => new SpecialPage( 'Userlogin' ),
  33         'Userlogout'        => new UnlistedSpecialPage( 'Userlogout' ),
  34         'Preferences'       => new SpecialPage( 'Preferences' ),
  35         'Watchlist'         => new SpecialPage( 'Watchlist' ),
  36
  37         'Recentchanges'     => new IncludableSpecialPage( 'Recentchanges' ),
  38         'Upload'            => new SpecialPage( 'Upload' ),
  39         'Imagelist'         => new SpecialPage( 'Imagelist' ),
  40         'Newimages'         => new SpecialPage( 'Newimages' ),
  41         'Listusers'         => new SpecialPage( 'Listusers' ),
  42         'Statistics'        => new SpecialPage( 'Statistics' ),
  43         'Random'        => new SpecialPage( 'Randompage' ),
  44         'Lonelypages'       => new SpecialPage( 'Lonelypages' ),
  45         'Uncategorizedpages'=> new SpecialPage( 'Uncategorizedpages' ),
  46         'Uncategorizedcategories'=> new SpecialPage( 'Uncategorizedcategories' ),
  47         'Unusedimages'      => new SpecialPage( 'Unusedimages' ),
  48         'Wantedpages'   => new SpecialPage( 'Wantedpages' ),
  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         'Ipblocklist'   => new SpecialPage( 'Ipblocklist' ),
  56         'Specialpages'  => new UnlistedSpecialPage( 'Specialpages' ),
  57         'Contributions' => new UnlistedSpecialPage( 'Contributions' ),
  58         'Emailuser'             => new UnlistedSpecialPage( 'Emailuser' ),
  59         'Whatlinkshere' => new UnlistedSpecialPage( 'Whatlinkshere' ),
  60         'Recentchangeslinked' => new UnlistedSpecialPage( 'Recentchangeslinked' ),
  61         'Movepage'              => new UnlistedSpecialPage( 'Movepage' ),
  62         'Blockme'       => new UnlistedSpecialPage( 'Blockme' ),
  63         'Booksources'   => new SpecialPage( 'Booksources' ),
  64         'Categories'    => new SpecialPage( 'Categories' ),
  65         'Export'                => new SpecialPage( 'Export' ),
  66         'Version'               => new SpecialPage( 'Version' ),
  67         'Allmessages'   => new SpecialPage( 'Allmessages' ),
  68         'Log'           => new SpecialPage( 'Log' ),
  69         'Blockip'               => new SpecialPage( 'Blockip', 'block' ),
  70         'Undelete'              => new SpecialPage( 'Undelete', 'delete' ),
  71         "Import"                => new SpecialPage( "Import", 'import' ),
  72         'Lockdb'                => new SpecialPage( 'Lockdb', 'siteadmin' ),
  73         'Unlockdb'              => new SpecialPage( 'Unlockdb', 'siteadmin' ),
  74         'Userrights'    => new SpecialPage( 'Userrights', 'userrights' ),
  75 );
  76
  77 global $wgUseValidation ;
  78 if ( $wgUseValidation )
  79         $wgSpecialPages['Validate'] = new SpecialPage( 'Validate' );
  80
  81 global $wgDisableCounters;
  82 if( !$wgDisableCounters ) {
  83         $wgSpecialPages['Popularpages'] = new SpecialPage( 'Popularpages' );
  84 }
  85
  86 global $wgDisableInternalSearch;
  87 if( !$wgDisableInternalSearch ) {
  88         $wgSpecialPages['Search'] = new UnlistedSpecialPage( 'Search' );
  89 }
  90
  91 global $wgEmailAuthentication;
  92 if( $wgEmailAuthentication ) {
  93         $wgSpecialPages['Confirmemail'] = new UnlistedSpecialPage( 'Confirmemail' );
  94 }
  95
  96 /**
  97  * Parent special page class, also static functions for handling the special
  98  * page list
  99  * @package MediaWiki
 100  */
 101 class SpecialPage
 102 {
 103         /**#@+
 104          * @access private
 105          */
 106         /**
 107          * The name of the class, used in the URL.
 108          * Also used for the default <h1> heading, @see getDescription()
 109          */
 110         var $mName;
 111         /**
 112          * Minimum user level required to access this page, or "" for anyone.
 113          * Also used to categorise the pages in Special:Specialpages
 114          */
 115         var $mRestriction;
 116         /**
 117          * Listed in Special:Specialpages?
 118          */
 119         var $mListed;
 120         /**
 121          * Function name called by the default execute()
 122          */
 123         var $mFunction;
 124         /**
 125          * File which needs to be included before the function above can be called
 126          */
 127         var $mFile;
 128         /**
 129          * Whether or not this special page is being included from an article
 130          */
 131         var $mIncluding;
 132         /**
 133          * Whether the special page can be included in an article
 134          */
 135         var $mIncludable;
 136
 137
 138         /**#@-*/
 139
 140
 141         /**
 142          * Add a page to the list of valid special pages
 143          * $obj->execute() must send HTML to $wgOut then return
 144          * Use this for a special page extension
 145          * @static
 146          */
 147         function addPage( &$obj ) {
 148                 global $wgSpecialPages;
 149                 $wgSpecialPages[$obj->mName] = $obj;
 150         }
 151
 152         /**
 153          * Remove a special page from the list
 154          * Occasionally used to disable expensive or dangerous special pages
 155          * @static
 156          */
 157         function removePage( $name ) {
 158                 global $wgSpecialPages;
 159                 unset( $wgSpecialPages[$name] );
 160         }
 161
 162         /**
 163          * Find the object with a given name and return it (or NULL)
 164          * @static
 165          * @param string $name
 166          */
 167         function &getPage( $name ) {
 168                 global $wgSpecialPages;
 169                 if ( array_key_exists( $name, $wgSpecialPages ) ) {
 170                         return $wgSpecialPages[$name];
 171                 } else {
 172                         return NULL;
 173                 }
 174         }
 175
 176         /**
 177          * @static
 178          * @param string $name
 179          * @return mixed Title object if the redirect exists, otherwise NULL
 180          */
 181         function &getRedirect( $name ) {
 182                 global $wgUser;
 183                 switch ( $name ) {
 184                         case 'Mypage':
 185                                 return Title::makeTitle( NS_USER, $wgUser->getName() );
 186                         case 'Mytalk':
 187                                 return Title::makeTitle( NS_USER_TALK, $wgUser->getName() );
 188                         case 'Mycontributions':
 189                                 return Title::makeTitle( NS_SPECIAL, 'Contributions/' . $wgUser->getName() );
 190                         case 'Listadmins':
 191                                 return Title::makeTitle( NS_SPECIAL, 'Listusers' );
 192                         case 'Randompage':
 193                                 return Title::makeTitle( NS_SPECIAL, 'Random' );
 194                         default:
 195                                 return NULL;
 196                 }
 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
 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                                 return false;
 246                         } else {
 247                                 $redir =& SpecialPage::getRedirect( $name );
 248                                 if ( isset( $redir ) ) {
 249                                         if ( isset( $par ) )
 250                                                 $wgOut->redirect( $redir->getFullURL() . '/' . $par );
 251                                         else
 252                                                 $wgOut->redirect( $redir->getFullURL() );
 253                                         $retVal = $redir;
 254                                 } else {
 255                                         $wgOut->setArticleRelated( false );
 256                                         $wgOut->setRobotpolicy( "noindex,follow" );
 257                                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
 258                                         $retVal = false;
 259                                 }
 260                         }
 261                 } else {
 262                         if ( $including && !$page->includable() ) {
 263                                 return false;
 264                         }
 265                         if($par !== NULL) {
 266                                 $wgTitle = Title::makeTitle( NS_SPECIAL, $name );
 267                         } else {
 268                                 $wgTitle = $title;
 269                         }
 270                         $page->including( $including );
 271
 272                         $page->execute( $par );
 273                         $retVal = true;
 274                 }
 275                 return $retVal;
 276         }
 277
 278         /**
 279          * Just like executePath() except it returns the HTML instead of outputting it
 280          * Returns false if there was no such special page, or a title object if it was
 281          * a redirect.
 282          * @static
 283          */
 284         function capturePath( &$title ) {
 285                 global $wgOut, $wgTitle;
 286
 287                 $oldTitle = $wgTitle;
 288                 $oldOut = $wgOut;
 289                 $wgOut = new OutputPage;
 290
 291                 $ret = SpecialPage::executePath( $title, true );
 292                 if ( $ret === true ) {
 293                         $ret = $wgOut->getHTML();
 294                 }
 295                 $wgTitle = $oldTitle;
 296                 $wgOut = $oldOut;
 297                 return $ret;
 298         }
 299
 300         /**
 301          * Default constructor for special pages
 302          * Derivative classes should call this from their constructor
 303          *     Note that if the user does not have the required level, an error message will
 304          *     be displayed by the default execute() method, without the global function ever
 305          *     being called.
 306          *
 307          *     If you override execute(), you can recover the default behaviour with userCanExecute()
 308          *     and displayRestrictionError()
 309          *
 310          * @param string $name Name of the special page, as seen in links and URLs
 311          * @param string $restriction Minimum user level required, e.g. "sysop" or "developer".
 312          * @param boolean $listed Whether the page is listed in Special:Specialpages
 313          * @param string $function Function called by execute(). By default it is constructed from $name
 314          * @param string $file File which is included by execute(). It is also constructed from $name by default
 315          */
 316         function SpecialPage( $name = '', $restriction = '', $listed = true, $function = false, $file = 'default', $includable = false ) {
 317                 $this->mName = $name;
 318                 $this->mRestriction = $restriction;
 319                 $this->mListed = $listed;
 320                 $this->mIncludable = $includable;
 321                 if ( $function == false ) {
 322                         $this->mFunction = 'wfSpecial'.$name;
 323                 } else {
 324                         $this->mFunction = $function;
 325                 }
 326                 if ( $file === 'default' ) {
 327                         $this->mFile = "Special{$name}.php";
 328                 } else {
 329                         $this->mFile = $file;
 330                 }
 331         }
 332
 333         # Accessor functions, see the descriptions of the associated variables above
 334         function getName() { return $this->mName; }
 335         function getRestriction() { return $this->mRestriction; }
 336         function isListed() { return $this->mListed; }
 337         function getFile() { return $this->mFile; }
 338         function including( $x = NULL ) { return wfSetVar( $this->mIncluding, $x ); }
 339         function includable( $x = NULL ) { return wfSetVar( $this->mIncludable, $x ); }
 340
 341         /**
 342          * Checks if the given user (identified by an object) can execute this
 343          * special page (as defined by $mRestriction)
 344          */
 345         function userCanExecute( &$user ) {
 346                 if ( $this->mRestriction == "" ) {
 347                         return true;
 348                 } else {
 349                         if ( in_array( $this->mRestriction, $user->getRights() ) ) {
 350                                 return true;
 351                         } else {
 352                                 return false;
 353                         }
 354                 }
 355         }
 356
 357         /**
 358          * Output an error message telling the user what access level they have to have
 359          */
 360         function displayRestrictionError() {
 361                 global $wgOut;
 362                 $wgOut->permissionRequired( $this->mRestriction );
 363         }
 364
 365         /**
 366          * Sets headers - this should be called from the execute() method of all derived classes!
 367          */
 368         function setHeaders() {
 369                 global $wgOut;
 370                 $wgOut->setArticleRelated( false );
 371                 $wgOut->setRobotPolicy( "noindex,follow" );
 372                 $wgOut->setPageTitle( $this->getDescription() );
 373         }
 374
 375         /**
 376          * Default execute method
 377          * Checks user permissions, calls the function given in mFunction
 378          */
 379         function execute( $par ) {
 380                 global $wgUser, $wgOut, $wgTitle;
 381
 382                 $this->setHeaders();
 383
 384                 if ( $this->userCanExecute( $wgUser ) ) {
 385                         if ( $this->mFile ) {
 386                                 require_once( $this->mFile );
 387                         }
 388                         $func = $this->mFunction;
 389                         $func( $par, $this );
 390                 } else {
 391                         $this->displayRestrictionError();
 392                 }
 393         }
 394
 395         # Returns the name that goes in the <h1> in the special page itself, and also the name that
 396         # will be listed in Special:Specialpages
 397         #
 398         # Derived classes can override this, but usually it is easier to keep the default behaviour.
 399         # Messages can be added at run-time, see MessageCache.php
 400         function getDescription() {
 401                 return wfMsg( strtolower( $this->mName ) );
 402         }
 403
 404         /**
 405          * Get a self-referential title object
 406          */
 407         function getTitle() {
 408                 return Title::makeTitle( NS_SPECIAL, $this->mName );
 409         }
 410
 411         /**
 412          * Set whether this page is listed in Special:Specialpages, at run-time
 413          */
 414         function setListed( $listed ) {
 415                 return wfSetVar( $this->mListed, $listed );
 416         }
 417
 418 }
 419
 420 /**
 421  * Shortcut to construct a special page which is unlisted by default
 422  * @package MediaWiki
 423  */
 424 class UnlistedSpecialPage extends SpecialPage
 425 {
 426         function UnlistedSpecialPage( $name, $restriction = '', $function = false, $file = 'default' ) {
 427                 SpecialPage::SpecialPage( $name, $restriction, false, $function, $file );
 428         }
 429 }
 430
 431 /**
 432  * Shortcut to construct an includable special  page
 433  * @package MediaWiki
 434  */
 435 class IncludableSpecialPage extends SpecialPage
 436 {
 437         function IncludableSpecialPage( $name, $restriction = '', $listed = true, $function = false, $file = 'default' ) {
 438                 SpecialPage::SpecialPage( $name, $restriction, $listed, $function, $file, true );
 439         }
 440 }
 441 ?>