includes/Wiki.php

   1 <?php
   2 /**
   3  * MediaWiki is the to-be base class for this whole project
   4  */
   5
   6 class MediaWiki {
   7
   8         var $GET; /* Stores the $_GET variables at time of creation, can be changed */
   9         var $params = array();
  10
  11         /**
  12          * Constructor
  13          */
  14         function MediaWiki () {
  15                 $this->GET = $_GET;
  16         }
  17
  18         /**
  19          * Stores key/value pairs to circumvent global variables
  20          * Note that keys are case-insensitive!
  21          */
  22         function setVal( $key, &$value ) {
  23                 $key = strtolower( $key );
  24                 $this->params[$key] =& $value;
  25         }
  26
  27         /**
  28          * Retieves key/value pairs to circumvent global variables
  29          * Note that keys are case-insensitive!
  30          */
  31         function getVal( $key, $default = "" ) {
  32                 $key = strtolower( $key );
  33                 if( isset( $this->params[$key] ) ) {
  34                         return $this->params[$key];
  35                 }
  36                 return $default;
  37         }
  38
  39         /**
  40          * Initialization of ... everything
  41          @return Article either the object to become $wgArticle, or NULL
  42          */
  43         function initialize ( &$title, &$output, &$user, $request) {
  44                 wfProfileIn( 'MediaWiki::initialize' );
  45                 $this->preliminaryChecks ( $title, $output, $request ) ;
  46                 $article = NULL;
  47                 if ( !$this->initializeSpecialCases( $title, $output, $request ) ) {
  48                         $article = $this->initializeArticle( $title, $request );
  49                         $this->performAction( $output, $article, $title, $user, $request );
  50                 }
  51                 wfProfileOut( 'MediaWiki::initialize' );
  52                 return $article;
  53         }
  54
  55         /**
  56          * Checks some initial queries
  57          * Note that $title here is *not* a Title object, but a string!
  58          */
  59         function checkInitialQueries( $title,$action,&$output,$request, $lang) {
  60                 if ($request->getVal( 'printable' ) == 'yes') {
  61                         $output->setPrintable();
  62                 }
  63
  64                 $ret = NULL ;
  65
  66
  67                 if ( '' == $title && 'delete' != $action ) {
  68                         $ret = Title::newFromText( wfMsgForContent( 'mainpage' ) );
  69                 } elseif ( $curid = $request->getInt( 'curid' ) ) {
  70                         # URLs like this are generated by RC, because rc_title isn't always accurate
  71                         $ret = Title::newFromID( $curid );
  72                 } else {
  73                         $ret = Title::newFromURL( $title );
  74                         /* check variant links so that interwiki links don't have to worry about
  75                            the possible different language variants
  76                         */
  77                         if( count($lang->getVariants()) > 1 && !is_null($ret) && $ret->getArticleID() == 0 )
  78                                 $lang->findVariantLink( $title, $ret );
  79
  80                 }
  81                 return $ret ;
  82         }
  83
  84         /**
  85          * Checks for search query and anon-cannot-read case
  86          */
  87         function preliminaryChecks ( &$title, &$output, $request ) {
  88
  89                 # Debug statement for user levels
  90                 // print_r($wgUser);
  91
  92                 $search = $request->getText( 'search' );
  93                 if( !is_null( $search ) && $search !== '' ) {
  94                         // Compatibility with old search URLs which didn't use Special:Search
  95                         // Do this above the read whitelist check for security...
  96                         $title = Title::makeTitle( NS_SPECIAL, 'Search' );
  97                 }
  98                 $this->setVal( "Search", $search );
  99
 100                 # If the user is not logged in, the Namespace:title of the article must be in
 101                 # the Read array in order for the user to see it. (We have to check here to
 102                 # catch special pages etc. We check again in Article::view())
 103                 if ( !is_null( $title ) && !$title->userCanRead() ) {
 104                         $output->loginToUse();
 105                         $output->output();
 106                         exit;
 107                 }
 108
 109         }
 110
 111         /**
 112          * Initialize the object to be known as $wgArticle for special cases
 113          */
 114         function initializeSpecialCases ( &$title, &$output, $request ) {
 115
 116                 wfProfileIn( 'MediaWiki::initializeSpecialCases' );
 117
 118                 $search = $this->getVal('Search');
 119                 $action = $this->getVal('Action');
 120                 if( !$this->getVal('DisableInternalSearch') && !is_null( $search ) && $search !== '' ) {
 121                         require_once( 'includes/SpecialSearch.php' );
 122                         $title = Title::makeTitle( NS_SPECIAL, 'Search' );
 123                         wfSpecialSearch();
 124                 } else if( !$title or $title->getDBkey() == '' ) {
 125                         $title = Title::newFromText( wfMsgForContent( 'badtitle' ) );
 126                         $output->errorpage( 'badtitle', 'badtitletext' );
 127                 } else if ( $title->getInterwiki() != '' ) {
 128                         if( $rdfrom = $request->getVal( 'rdfrom' ) ) {
 129                                 $url = $title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
 130                         } else {
 131                                 $url = $title->getFullURL();
 132                         }
 133                         /* Check for a redirect loop */
 134                         if ( !preg_match( '/^' . preg_quote( $this->getVal('Server'), '/' ) . '/', $url ) && $title->isLocal() ) {
 135                                 $output->redirect( $url );
 136                         } else {
 137                                 $title = Title::newFromText( wfMsgForContent( 'badtitle' ) );
 138                                 $output->errorpage( 'badtitle', 'badtitletext' );
 139                         }
 140                 } else if ( ( $action == 'view' ) &&
 141                         (!isset( $this->GET['title'] ) || $title->getPrefixedDBKey() != $this->GET['title'] ) &&
 142                         !count( array_diff( array_keys( $this->GET ), array( 'action', 'title' ) ) ) )
 143                 {
 144                         /* Redirect to canonical url, make it a 301 to allow caching */
 145                         $output->setSquidMaxage( 1200 );
 146                         $output->redirect( $title->getFullURL(), '301');
 147                 } else if ( NS_SPECIAL == $title->getNamespace() ) {
 148                         /* actions that need to be made when we have a special pages */
 149                         SpecialPage::executePath( $title );
 150                 } else {
 151                         /* No match to special cases */
 152                         wfProfileOut( 'MediaWiki::initializeSpecialCases' );
 153                         return false;
 154                 }
 155                 /* Did match a special case */
 156                 wfProfileOut( 'MediaWiki::initializeSpecialCases' );
 157                 return true;
 158         }
 159
 160         /**
 161          * Initialize the object to be known as $wgArticle for "standard" actions
 162          */
 163         function initializeArticle( &$title, $request ) {
 164
 165                 wfProfileIn( 'MediaWiki::initializeArticle' );
 166
 167                 $action = $this->getVal('Action');
 168
 169                 if( NS_MEDIA == $title->getNamespace() ) {
 170                         $title = Title::makeTitle( NS_IMAGE, $title->getDBkey() );
 171                 }
 172
 173                 $ns = $title->getNamespace();
 174
 175                 /* Namespace might change when using redirects */
 176                 $article = new Article( $title );
 177                 if( $action == 'view' && !$request->getVal( 'oldid' ) ) {
 178                         $rTitle = Title::newFromRedirect( $article->fetchContent() );
 179                         if( $rTitle ) {
 180                                 /* Reload from the page pointed to later */
 181                                 $article->mContentLoaded = false;
 182                                 $ns = $rTitle->getNamespace();
 183                                 $wasRedirected = true;
 184                                 }
 185                 }
 186
 187                 /* Categories and images are handled by a different class */
 188                 if( $ns == NS_IMAGE ) {
 189                         $b4 = $title->getPrefixedText();
 190                         unset( $article );
 191                         require_once( 'includes/ImagePage.php' );
 192                         $article = new ImagePage( $title );
 193                         if( isset( $wasRedirected ) && $request->getVal( 'redirect' ) != 'no' ) {
 194                                 $article->mTitle = $rTitle;
 195                                 $article->mRedirectedFrom = $b4;
 196                         }
 197                 } elseif( $ns == NS_CATEGORY ) {
 198                         unset( $article );
 199                         require_once( 'includes/CategoryPage.php' );
 200                         $article = new CategoryPage( $title );
 201                 }
 202                 wfProfileOut( 'MediaWiki::initializeArticle' );
 203                 return $article;
 204         }
 205
 206         /**
 207          * Cleaning up by doing deferred updates, calling loadbalancer and doing the output
 208          */
 209         function finalCleanup ( &$deferredUpdates, &$loadBalancer, &$output ) {
 210                 wfProfileIn( 'MediaWiki::finalCleanup' );
 211                 $this->doUpdates( $deferredUpdates );
 212                 $loadBalancer->saveMasterPos();
 213                 # Now commit any transactions, so that unreported errors after output() don't roll back the whole thing
 214                 $loadBalancer->commitAll();
 215                 $output->output();
 216                 wfProfileOut( 'MediaWiki::finalCleanup' );
 217         }
 218
 219         /**
 220          * Deferred updates aren't really deferred anymore. It's important to report errors to the
 221          * user, and that means doing this before OutputPage::output(). Note that for page saves,
 222          * the client will wait until the script exits anyway before following the redirect.
 223          */
 224         function doUpdates ( &$updates ) {
 225                 wfProfileIn( 'MediaWiki::doUpdates' );
 226                 foreach( $updates as $up ) {
 227                         $up->doUpdate();
 228                 }
 229                 wfProfileOut( 'MediaWiki::doUpdates' );
 230         }
 231
 232         /**
 233          * Ends this task peacefully
 234          */
 235         function restInPeace ( &$loadBalancer ) {
 236                 wfProfileClose();
 237                 logProfilingData();
 238                 $loadBalancer->closeAll();
 239                 wfDebug( "Request ended normally\n" );
 240         }
 241
 242         /**
 243          * Perform one of the "standard" actions
 244          */
 245         function performAction( &$output, &$article, &$title, &$user, &$request ) {
 246
 247                 wfProfileIn( 'MediaWiki::performAction' );
 248
 249                 $action = $this->getVal('Action');
 250                 if( in_array( $action, $this->getVal('DisabledActions',array()) ) ) {
 251                         /* No such action; this will switch to the default case */
 252                         $action = "nosuchaction";
 253                 }
 254
 255                 switch( $action ) {
 256                         case 'view':
 257                                 $output->setSquidMaxage( $this->getVal( 'SquidMaxage' ) );
 258                                 $article->view();
 259                                 break;
 260                         case 'watch':
 261                         case 'unwatch':
 262                         case 'delete':
 263                         case 'revert':
 264                         case 'rollback':
 265                         case 'protect':
 266                         case 'unprotect':
 267                         case 'info':
 268                         case 'markpatrolled':
 269                         case 'validate':
 270                         case 'render':
 271                         case 'deletetrackback':
 272                         case 'purge':
 273                                 $article->$action();
 274                                 break;
 275                         case 'print':
 276                                 $article->view();
 277                                 break;
 278                         case 'dublincore':
 279                                 if( !$this->getVal( 'EnableDublinCoreRdf' ) ) {
 280                                         wfHttpError( 403, 'Forbidden', wfMsg( 'nodublincore' ) );
 281                                 } else {
 282                                         require_once( 'includes/Metadata.php' );
 283                                         wfDublinCoreRdf( $article );
 284                                 }
 285                                 break;
 286                         case 'creativecommons':
 287                                 if( !$this->getVal( 'EnableCreativeCommonsRdf' ) ) {
 288                                         wfHttpError( 403, 'Forbidden', wfMsg( 'nocreativecommons' ) );
 289                                 } else {
 290                                         require_once( 'includes/Metadata.php' );
 291                                         wfCreativeCommonsRdf( $article );
 292                                 }
 293                                 break;
 294                         case 'credits':
 295                                 require_once( 'includes/Credits.php' );
 296                                 showCreditsPage( $article );
 297                                 break;
 298                         case 'submit':
 299                                 if( !$this->getVal( 'CommandLineMode' ) && !$request->checkSessionCookie() ) {
 300                                         /* Send a cookie so anons get talk message notifications */
 301                                         User::SetupSession();
 302                                 }
 303                                 /* Continue... */
 304                         case 'edit':
 305                                 $internal = $request->getVal( 'internaledit' );
 306                                 $external = $request->getVal( 'externaledit' );
 307                                 $section = $request->getVal( 'section' );
 308                                 $oldid = $request->getVal( 'oldid' );
 309                                 if( !$this->getVal( 'UseExternalEditor' ) || $action=='submit' || $internal ||
 310                                    $section || $oldid || ( !$user->getOption( 'externaleditor' ) && !$external ) ) {
 311                                         require_once( 'includes/EditPage.php' );
 312                                         $editor = new EditPage( $article );
 313                                         $editor->submit();
 314                                 } elseif( $this->getVal( 'UseExternalEditor' ) && ( $external || $user->getOption( 'externaleditor' ) ) ) {
 315                                         require_once( 'includes/ExternalEdit.php' );
 316                                         $mode = $request->getVal( 'mode' );
 317                                         $extedit = new ExternalEdit( $article, $mode );
 318                                         $extedit->edit();
 319                                 }
 320                                 break;
 321                         case 'history':
 322                                 if( $_SERVER['REQUEST_URI'] == $title->getInternalURL( 'action=history' ) ) {
 323                                         $output->setSquidMaxage( $this->getVal( 'SquidMaxage' ) );
 324                                 }
 325                                 require_once( 'includes/PageHistory.php' );
 326                                 $history = new PageHistory( $article );
 327                                 $history->history();
 328                                 break;
 329                         case 'raw':
 330                                 require_once( 'includes/RawPage.php' );
 331                                 $raw = new RawPage( $article );
 332                                 $raw->view();
 333                                 break;
 334                         default:
 335                                 if( wfRunHooks( 'UnknownAction', array( $action, $article ) ) ) {
 336                                         $output->errorpage( 'nosuchaction', 'nosuchactiontext' );
 337                                 }
 338                 wfProfileOut( 'MediaWiki::performAction' );
 339         }
 340
 341
 342         }
 343
 344 }; /* End of class MediaWiki */
 345
 346 ?>
 347