]> scripts.mit.edu Git - autoinstalls/mediawiki.git/blobdiff - includes/Article.php
MediaWiki 1.14.0
[autoinstalls/mediawiki.git] / includes / Article.php
index 7ba55c548b73b0c00f3e4799837f8bd0746e8eed..3d9c2147887ae9d565299a2a9f8fffa15dcf6126 100644 (file)
@@ -1,6 +1,7 @@
 <?php
 /**
  * File for articles
+ * @file
  */
 
 /**
@@ -15,48 +16,49 @@ class Article {
        /**@{{
         * @private
         */
-       var $mComment;                  //!<
-       var $mContent;                  //!<
-       var $mContentLoaded;    //!<
-       var $mCounter;                  //!<
-       var $mForUpdate;                //!<
-       var $mGoodAdjustment;   //!<
-       var $mLatest;                   //!<
-       var $mMinorEdit;                //!<
-       var $mOldId;                    //!<
-       var $mRedirectedFrom;   //!<
-       var $mRedirectUrl;              //!<
-       var $mRevIdFetched;             //!<
-       var $mRevision;                 //!<
-       var $mTimestamp;                //!<
-       var $mTitle;                    //!<
-       var $mTotalAdjustment;  //!<
-       var $mTouched;                  //!<
-       var $mUser;                             //!<
-       var $mUserText;                 //!<
+       var $mComment = '';               //!<
+       var $mContent;                    //!<
+       var $mContentLoaded = false;      //!<
+       var $mCounter = -1;               //!< Not loaded
+       var $mCurID = -1;                 //!< Not loaded
+       var $mDataLoaded = false;         //!<
+       var $mForUpdate = false;          //!<
+       var $mGoodAdjustment = 0;         //!<
+       var $mIsRedirect = false;         //!<
+       var $mLatest = false;             //!<
+       var $mMinorEdit;                  //!<
+       var $mOldId;                      //!<
+       var $mPreparedEdit = false;       //!< Title object if set
+       var $mRedirectedFrom = null;      //!< Title object if set
+       var $mRedirectTarget = null;      //!< Title object if set
+       var $mRedirectUrl = false;        //!<
+       var $mRevIdFetched = 0;           //!<
+       var $mRevision;                   //!<
+       var $mTimestamp = '';             //!<
+       var $mTitle;                      //!<
+       var $mTotalAdjustment = 0;        //!<
+       var $mTouched = '19700101000000'; //!<
+       var $mUser = -1;                  //!< Not loaded
+       var $mUserText = '';              //!<
        /**@}}*/
 
-       /**
-        * Constants used by internal components to get rollback results
-        */
-       const SUCCESS = 0;                      // Operation successful
-       const PERM_DENIED = 1;          // Permission denied
-       const BLOCKED = 2;                      // User has been blocked
-       const READONLY = 3;                     // Wiki is in read-only mode
-       const BAD_TOKEN = 4;            // Invalid token specified
-       const BAD_TITLE = 5;            // $this is not a valid Article
-       const ALREADY_ROLLED = 6;       // Someone else already rolled this back. $from and $summary will be set
-       const ONLY_AUTHOR = 7;          // User is the only author of the page
        /**
         * Constructor and clear the article
         * @param $title Reference to a Title object.
         * @param $oldId Integer revision ID, null to fetch from request, zero for current
         */
-       function __construct( &$title, $oldId = null ) {
+       public function __construct( Title $title, $oldId = null ) {
                $this->mTitle =& $title;
                $this->mOldId = $oldId;
-               $this->clear();
+       }
+
+       /**
+        * Constructor from an article article
+        * @param $id The article ID to load
+        */
+       public static function newFromID( $id ) {
+               $t = Title::newFromID( $id );
+               return $t == null ? null : new Article( $t );
        }
 
        /**
@@ -64,17 +66,76 @@ class Article {
         * from another page on the wiki.
         * @param $from Title object.
         */
-       function setRedirectedFrom( $from ) {
+       public function setRedirectedFrom( $from ) {
                $this->mRedirectedFrom = $from;
        }
 
        /**
+        * If this page is a redirect, get its target
+        *
+        * The target will be fetched from the redirect table if possible.
+        * If this page doesn't have an entry there, call insertRedirect()
+        * @return mixed Title object, or null if this page is not a redirect
+        */
+       public function getRedirectTarget() {
+               if( !$this->mTitle || !$this->mTitle->isRedirect() )
+                       return null;
+               if( !is_null($this->mRedirectTarget) )
+                       return $this->mRedirectTarget;
+               # Query the redirect table
+               $dbr = wfGetDB( DB_SLAVE );
+               $res = $dbr->select( 'redirect',
+                       array('rd_namespace', 'rd_title'),
+                       array('rd_from' => $this->getID()),
+                       __METHOD__
+               );
+               if( $row = $dbr->fetchObject($res) ) {
+                       return $this->mRedirectTarget = Title::makeTitle($row->rd_namespace, $row->rd_title);
+               }
+               # This page doesn't have an entry in the redirect table
+               return $this->mRedirectTarget = $this->insertRedirect();
+       }
+
+       /**
+        * Insert an entry for this page into the redirect table.
+        *
+        * Don't call this function directly unless you know what you're doing.
+        * @return Title object
+        */
+       public function insertRedirect() {
+               $retval = Title::newFromRedirect( $this->getContent() );
+               if( !$retval ) {
+                       return null;
+               }
+               $dbw = wfGetDB( DB_MASTER );
+               $dbw->replace( 'redirect', array('rd_from'), 
+                       array(
+                               'rd_from' => $this->getID(),
+                               'rd_namespace' => $retval->getNamespace(),
+                               'rd_title' => $retval->getDBKey()
+                       ),
+                       __METHOD__
+               );
+               return $retval;
+       }
+
+       /**
+        * Get the Title object this page redirects to
+        *
         * @return mixed false, Title of in-wiki target, or string with URL
         */
-       function followRedirect() {
+       public function followRedirect() {
                $text = $this->getContent();
-               $rt = Title::newFromRedirect( $text );
+               return $this->followRedirectText( $text );
+       }
 
+       /**
+        * Get the Title object this text redirects to
+        *
+        * @return mixed false, Title of in-wiki target, or string with URL
+        */
+       public function followRedirectText( $text ) {
+               $rt = Title::newFromRedirect( $text );
                # process if title object is valid and not special:userlogout
                if( $rt ) {
                        if( $rt->getInterwiki() != '' ) {
@@ -83,7 +144,6 @@ class Article {
                                        //
                                        // This can be hard to reverse and may produce loops,
                                        // so they may be disabled in the site configuration.
-
                                        $source = $this->mTitle->getFullURL( 'redirect=no' );
                                        return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
                                }
@@ -94,7 +154,6 @@ class Article {
                                        // the rest of the page we're on.
                                        //
                                        // This can be hard to reverse, so they may be disabled.
-
                                        if( $rt->isSpecial( 'Userlogout' ) ) {
                                                // rolleyes
                                        } else {
@@ -104,7 +163,6 @@ class Article {
                                return $rt;
                        }
                }
-
                // No or invalid redirect
                return false;
        }
@@ -112,20 +170,21 @@ class Article {
        /**
         * get the title object of the article
         */
-       function getTitle() {
+       public function getTitle() {
                return $this->mTitle;
        }
 
        /**
-         * Clear the object
-         * @private
-         */
-       function clear() {
+        * Clear the object
+        * @private
+        */
+       public function clear() {
                $this->mDataLoaded    = false;
                $this->mContentLoaded = false;
 
                $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
                $this->mRedirectedFrom = null; # Title object if set
+               $this->mRedirectTarget = null; # Title object if set
                $this->mUserText =
                $this->mTimestamp = $this->mComment = '';
                $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
@@ -135,35 +194,34 @@ class Article {
                $this->mRevIdFetched = 0;
                $this->mRedirectUrl = false;
                $this->mLatest = false;
+               $this->mPreparedEdit = false;
        }
 
        /**
         * Note that getContent/loadContent do not follow redirects anymore.
         * If you need to fetch redirectable content easily, try
         * the shortcut in Article::followContent()
-        * FIXME
-        * @todo There are still side-effects in this!
-        *        In general, you should use the Revision class, not Article,
-        *        to fetch text for purposes other than page views.
         *
         * @return Return the text of this revision
        */
-       function getContent() {
-               global $wgUser, $wgOut;
-
+       public function getContent() {
+               global $wgUser, $wgContLang, $wgOut, $wgMessageCache;
                wfProfileIn( __METHOD__ );
-
-               if ( 0 == $this->getID() ) {
-                       wfProfileOut( __METHOD__ );
-                       $wgOut->setRobotpolicy( 'noindex,nofollow' );
-
-                       if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
-                               $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
+               if( $this->getID() === 0 ) {
+                       # If this is a MediaWiki:x message, then load the messages
+                       # and return the message value for x.
+                       if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
+                               # If this is a system message, get the default text.
+                               list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
+                               $wgMessageCache->loadAllMessages( $lang );
+                               $text = wfMsgGetKey( $message, false, $lang, false );
+                               if( wfEmptyMsg( $message, $text ) )
+                                       $text = '';
                        } else {
-                               $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
+                               $text = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
                        }
-
-                       return "<div class='noarticletext'>$ret</div>";
+                       wfProfileOut( __METHOD__ );
+                       return $text;
                } else {
                        $this->loadContent();
                        wfProfileOut( __METHOD__ );
@@ -183,7 +241,7 @@ class Article {
         * @return string text of the requested section
         * @deprecated
         */
-       function getSection($text,$section) {
+       public function getSection( $text, $section ) {
                global $wgParser;
                return $wgParser->getSection( $text, $section );
        }
@@ -192,8 +250,8 @@ class Article {
         * @return int The oldid of the article that is to be shown, 0 for the
         *             current revision
         */
-       function getOldID() {
-               if ( is_null( $this->mOldId ) ) {
+       public function getOldID() {
+               if( is_null( $this->mOldId ) ) {
                        $this->mOldId = $this->getOldIDFromRequest();
                }
                return $this->mOldId;
@@ -204,32 +262,27 @@ class Article {
         *
         * @return int The old id for the request
         */
-       function getOldIDFromRequest() {
+       public function getOldIDFromRequest() {
                global $wgRequest;
                $this->mRedirectUrl = false;
                $oldid = $wgRequest->getVal( 'oldid' );
-               if ( isset( $oldid ) ) {
+               if( isset( $oldid ) ) {
                        $oldid = intval( $oldid );
-                       if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
+                       if( $wgRequest->getVal( 'direction' ) == 'next' ) {
                                $nextid = $this->mTitle->getNextRevisionID( $oldid );
-                               if ( $nextid  ) {
+                               if( $nextid  ) {
                                        $oldid = $nextid;
                                } else {
                                        $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
                                }
-                       } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
+                       } elseif( $wgRequest->getVal( 'direction' ) == 'prev' ) {
                                $previd = $this->mTitle->getPreviousRevisionID( $oldid );
-                               if ( $previd ) {
+                               if( $previd ) {
                                        $oldid = $previd;
-                               } else {
-                                       # TODO
                                }
                        }
-                       # unused:
-                       # $lastid = $oldid;
                }
-
-               if ( !$oldid ) {
+               if( !$oldid ) {
                        $oldid = 0;
                }
                return $oldid;
@@ -239,25 +292,24 @@ class Article {
         * Load the revision (including text) into this object
         */
        function loadContent() {
-               if ( $this->mContentLoaded ) return;
-
+               if( $this->mContentLoaded ) return;
+               wfProfileIn( __METHOD__ );
                # Query variables :P
                $oldid = $this->getOldID();
-
                # Pre-fill content with error message so that if something
                # fails we'll have something telling us what we intended.
                $this->mOldId = $oldid;
                $this->fetchContent( $oldid );
+               wfProfileOut( __METHOD__ );
        }
 
 
        /**
         * Fetch a page record with the given conditions
-        * @param Database $dbr
-        * @param array    $conditions
-        * @private
+        * @param $dbr Database object
+        * @param $conditions Array
         */
-       function pageData( $dbr, $conditions ) {
+       protected function pageData( $dbr, $conditions ) {
                $fields = array(
                                'page_id',
                                'page_namespace',
@@ -283,20 +335,20 @@ class Article {
        }
 
        /**
-        * @param Database $dbr
-        * @param Title $title
+        * @param $dbr Database object
+        * @param $title Title object
         */
-       function pageDataFromTitle( $dbr, $title ) {
+       public function pageDataFromTitle( $dbr, $title ) {
                return $this->pageData( $dbr, array(
                        'page_namespace' => $title->getNamespace(),
                        'page_title'     => $title->getDBkey() ) );
        }
 
        /**
-        * @param Database $dbr
-        * @param int $id
+        * @param $dbr Database
+        * @param $id Integer
         */
-       function pageDataFromId( $dbr, $id ) {
+       protected function pageDataFromId( $dbr, $id ) {
                return $this->pageData( $dbr, array( 'page_id' => $id ) );
        }
 
@@ -304,22 +356,21 @@ class Article {
         * Set the general counter, title etc data loaded from
         * some source.
         *
-        * @param object $data
-        * @private
+        * @param $data Database row object or "fromdb"
         */
-       function loadPageData( $data = 'fromdb' ) {
-               if ( $data === 'fromdb' ) {
-                       $dbr = $this->getDB();
+       public function loadPageData( $data = 'fromdb' ) {
+               if( $data === 'fromdb' ) {
+                       $dbr = wfGetDB( DB_MASTER );
                        $data = $this->pageDataFromId( $dbr, $this->getId() );
                }
 
-               $lc =& LinkCache::singleton();
-               if ( $data ) {
-                       $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
+               $lc = LinkCache::singleton();
+               if( $data ) {
+                       $lc->addGoodLinkObj( $data->page_id, $this->mTitle, $data->page_len, $data->page_is_redirect );
 
                        $this->mTitle->mArticleID = $data->page_id;
 
-                       # Old-fashioned restrictions.
+                       # Old-fashioned restrictions
                        $this->mTitle->loadRestrictions( $data->page_restrictions );
 
                        $this->mCounter     = $data->page_counter;
@@ -327,7 +378,7 @@ class Article {
                        $this->mIsRedirect  = $data->page_is_redirect;
                        $this->mLatest      = $data->page_latest;
                } else {
-                       if ( is_object( $this->mTitle ) ) {
+                       if( is_object( $this->mTitle ) ) {
                                $lc->addBadLinkObj( $this->mTitle );
                        }
                        $this->mTitle->mArticleID = 0;
@@ -339,23 +390,21 @@ class Article {
        /**
         * Get text of an article from database
         * Does *NOT* follow redirects.
-        * @param int $oldid 0 for whatever the latest revision is
+        * @param $oldid Int: 0 for whatever the latest revision is
         * @return string
         */
        function fetchContent( $oldid = 0 ) {
-               if ( $this->mContentLoaded ) {
+               if( $this->mContentLoaded ) {
                        return $this->mContent;
                }
 
-               $dbr = $this->getDB();
+               $dbr = wfGetDB( DB_MASTER );
 
                # Pre-fill content with error message so that if something
                # fails we'll have something telling us what we intended.
                $t = $this->mTitle->getPrefixedText();
-               if( $oldid ) {
-                       $t .= ',oldid='.$oldid;
-               }
-               $this->mContent = wfMsg( 'missingarticle', $t ) ;
+               $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
+               $this->mContent = wfMsg( 'missing-article', $t, $d ) ;
 
                if( $oldid ) {
                        $revision = Revision::newFromId( $oldid );
@@ -381,22 +430,21 @@ class Article {
                        }
                        $revision = Revision::newFromId( $this->mLatest );
                        if( is_null( $revision ) ) {
-                               wfDebug( __METHOD__." failed to retrieve current page, rev_id {$data->page_latest}\n" );
+                               wfDebug( __METHOD__." failed to retrieve current page, rev_id {$this->mLatest}\n" );
                                return false;
                        }
                }
 
                // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
                // We should instead work with the Revision object when we need it...
-               $this->mContent = $revision->userCan( Revision::DELETED_TEXT ) ? $revision->getRawText() : "";
-               //$this->mContent   = $revision->getText();
+               $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 
                $this->mUser      = $revision->getUser();
                $this->mUserText  = $revision->getUserText();
                $this->mComment   = $revision->getComment();
                $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 
-               $this->mRevIdFetched = $revision->getID();
+               $this->mRevIdFetched = $revision->getId();
                $this->mContentLoaded = true;
                $this->mRevision =& $revision;
 
@@ -410,7 +458,7 @@ class Article {
         *
         * @param $x Mixed: FIXME
         */
-       function forUpdate( $x = NULL ) {
+       public function forUpdate( $x = NULL ) {
                return wfSetVar( $this->mForUpdate, $x );
        }
 
@@ -418,8 +466,10 @@ class Article {
         * Get the database which should be used for reads
         *
         * @return Database
+        * @deprecated - just call wfGetDB( DB_MASTER ) instead
         */
        function getDB() {
+               wfDeprecated( __METHOD__ );
                return wfGetDB( DB_MASTER );
        }
 
@@ -430,9 +480,9 @@ class Article {
         *                       the default
         * @return Array: options
         */
-       function getSelectOptions( $options = '' ) {
-               if ( $this->mForUpdate ) {
-                       if ( is_array( $options ) ) {
+       protected function getSelectOptions( $options = '' ) {
+               if( $this->mForUpdate ) {
+                       if( is_array( $options ) ) {
                                $options[] = 'FOR UPDATE';
                        } else {
                                $options = 'FOR UPDATE';
@@ -444,7 +494,7 @@ class Article {
        /**
         * @return int Page ID
         */
-       function getID() {
+       public function getID() {
                if( $this->mTitle ) {
                        return $this->mTitle->getArticleID();
                } else {
@@ -455,22 +505,38 @@ class Article {
        /**
         * @return bool Whether or not the page exists in the database
         */
-       function exists() {
-               return $this->getId() != 0;
+       public function exists() {
+               return $this->getId() > 0;
+       }
+       
+       /**
+        * Check if this page is something we're going to be showing
+        * some sort of sensible content for. If we return false, page
+        * views (plain action=view) will return an HTTP 404 response,
+        * so spiders and robots can know they're following a bad link.
+        *
+        * @return bool
+        */
+       public function hasViewableContent() {
+               return $this->exists() || $this->mTitle->isAlwaysKnown();
        }
 
        /**
         * @return int The view count for the page
         */
-       function getCount() {
-               if ( -1 == $this->mCounter ) {
+       public function getCount() {
+               if( -1 == $this->mCounter ) {
                        $id = $this->getID();
-                       if ( $id == 0 ) {
+                       if( $id == 0 ) {
                                $this->mCounter = 0;
                        } else {
                                $dbr = wfGetDB( DB_SLAVE );
-                               $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
-                                       'Article::getCount', $this->getSelectOptions() );
+                               $this->mCounter = $dbr->selectField( 'page', 
+                                       'page_counter', 
+                                       array( 'page_id' => $id ), 
+                                       __METHOD__, 
+                                       $this->getSelectOptions()
+                               );
                        }
                }
                return $this->mCounter;
@@ -483,14 +549,11 @@ class Article {
         * @param $text String: text to analyze
         * @return bool
         */
-       function isCountable( $text ) {
+       public function isCountable( $text ) {
                global $wgUseCommaCount;
 
                $token = $wgUseCommaCount ? ',' : '[[';
-               return
-                       $this->mTitle->isContentPage()
-                       && !$this->isRedirect( $text )
-                       && in_string( $token, $text );
+               return $this->mTitle->isContentPage() && !$this->isRedirect($text) && in_string($token,$text);
        }
 
        /**
@@ -499,8 +562,12 @@ class Article {
         * @param $text String: FIXME
         * @return bool
         */
-       function isRedirect( $text = false ) {
-               if ( $text === false ) {
+       public function isRedirect( $text = false ) {
+               if( $text === false ) {
+                       if( $this->mDataLoaded ) {
+                               return $this->mIsRedirect;
+                       }
+                       // Apparently loadPageData was never called
                        $this->loadContent();
                        $titleObj = Title::newFromRedirect( $this->fetchContent() );
                } else {
@@ -514,79 +581,76 @@ class Article {
         * to this page (and it exists).
         * @return bool
         */
-       function isCurrent() {
+       public function isCurrent() {
                # If no oldid, this is the current version.
-               if ($this->getOldID() == 0)
+               if( $this->getOldID() == 0 ) {
                        return true;
-
-               return $this->exists() &&
-                       isset( $this->mRevision ) &&
-                       $this->mRevision->isCurrent();
+               }
+               return $this->exists() && isset($this->mRevision) && $this->mRevision->isCurrent();
        }
 
        /**
         * Loads everything except the text
         * This isn't necessary for all uses, so it's only done if needed.
-        * @private
         */
-       function loadLastEdit() {
-               if ( -1 != $this->mUser )
+       protected function loadLastEdit() {
+               if( -1 != $this->mUser )
                        return;
 
                # New or non-existent articles have no user information
                $id = $this->getID();
-               if ( 0 == $id ) return;
+               if( 0 == $id ) return;
 
-               $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
+               $this->mLastRevision = Revision::loadFromPageId( wfGetDB( DB_MASTER ), $id );
                if( !is_null( $this->mLastRevision ) ) {
                        $this->mUser      = $this->mLastRevision->getUser();
                        $this->mUserText  = $this->mLastRevision->getUserText();
                        $this->mTimestamp = $this->mLastRevision->getTimestamp();
                        $this->mComment   = $this->mLastRevision->getComment();
                        $this->mMinorEdit = $this->mLastRevision->isMinor();
-                       $this->mRevIdFetched = $this->mLastRevision->getID();
+                       $this->mRevIdFetched = $this->mLastRevision->getId();
                }
        }
 
-       function getTimestamp() {
+       public function getTimestamp() {
                // Check if the field has been filled by ParserCache::get()
-               if ( !$this->mTimestamp ) {
+               if( !$this->mTimestamp ) {
                        $this->loadLastEdit();
                }
                return wfTimestamp(TS_MW, $this->mTimestamp);
        }
 
-       function getUser() {
+       public function getUser() {
                $this->loadLastEdit();
                return $this->mUser;
        }
 
-       function getUserText() {
+       public function getUserText() {
                $this->loadLastEdit();
                return $this->mUserText;
        }
 
-       function getComment() {
+       public function getComment() {
                $this->loadLastEdit();
                return $this->mComment;
        }
 
-       function getMinorEdit() {
+       public function getMinorEdit() {
                $this->loadLastEdit();
                return $this->mMinorEdit;
        }
 
-       function getRevIdFetched() {
+       /* Use this to fetch the rev ID used on page views */
+       public function getRevIdFetched() {
                $this->loadLastEdit();
                return $this->mRevIdFetched;
        }
 
        /**
-        * @todo Document, fixme $offset never used.
         * @param $limit Integer: default 0.
         * @param $offset Integer: default 0.
         */
-       function getContributors($limit = 0, $offset = 0) {
+       public function getContributors($limit = 0, $offset = 0) {
                # XXX: this is expensive; cache this info somewhere.
 
                $contribs = array();
@@ -596,46 +660,62 @@ class Article {
                $user = $this->getUser();
                $pageId = $this->getId();
 
-               $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
+               $sql = "SELECT {$userTable}.*, MAX(rev_timestamp) as timestamp
                        FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
                        WHERE rev_page = $pageId
                        AND rev_user != $user
                        GROUP BY rev_user, rev_user_text, user_real_name
                        ORDER BY timestamp DESC";
 
-               if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
-               $sql .= ' '. $this->getSelectOptions();
+               if($limit > 0) { $sql .= ' LIMIT '.$limit; }
+               if($offset > 0) { $sql .= ' OFFSET '.$offset; }
 
-               $res = $dbr->query($sql, __METHOD__);
+               $sql .= ' '. $this->getSelectOptions();
 
-               while ( $line = $dbr->fetchObject( $res ) ) {
-                       $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
-               }
+               $res = $dbr->query($sql, __METHOD__ );
 
-               $dbr->freeResult($res);
-               return $contribs;
+               return new UserArrayFromResult( $res );
        }
 
        /**
         * This is the default action of the script: just view the page of
         * the given title.
        */
-       function view() {
+       public function view() {
                global $wgUser, $wgOut, $wgRequest, $wgContLang;
-               global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
+               global $wgEnableParserCache, $wgStylePath, $wgParser;
                global $wgUseTrackbacks, $wgNamespaceRobotPolicies, $wgArticleRobotPolicies;
-               $sk = $wgUser->getSkin();
+               global $wgDefaultRobotPolicy;
 
                wfProfileIn( __METHOD__ );
 
-               $parserCache =& ParserCache::singleton();
-               $ns = $this->mTitle->getNamespace(); # shortcut
-
                # Get variables from query string
                $oldid = $this->getOldID();
 
+               # Try file cache
+               if( $oldid === 0 && $this->checkTouched() ) {
+                       global $wgUseETag;
+                       if( $wgUseETag ) {
+                               $parserCache = ParserCache::singleton();
+                               $wgOut->setETag( $parserCache->getETag($this,$wgUser) );
+                       }
+                       if( $wgOut->checkLastModified( $this->getTouched() ) ) {
+                               wfProfileOut( __METHOD__ );
+                               return;
+                       } else if( $this->tryFileCache() ) {
+                               # tell wgOut that output is taken care of
+                               $wgOut->disable();
+                               $this->viewUpdates();
+                               wfProfileOut( __METHOD__ );
+                               return;
+                       }
+               }
+
+               $ns = $this->mTitle->getNamespace(); # shortcut
+               $sk = $wgUser->getSkin();
+
                # getOldID may want us to redirect somewhere else
-               if ( $this->mRedirectUrl ) {
+               if( $this->mRedirectUrl ) {
                        $wgOut->redirect( $this->mRedirectUrl );
                        wfProfileOut( __METHOD__ );
                        return;
@@ -645,30 +725,33 @@ class Article {
                $rcid = $wgRequest->getVal( 'rcid' );
                $rdfrom = $wgRequest->getVal( 'rdfrom' );
                $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
+               $purge = $wgRequest->getVal( 'action' ) == 'purge';
+               $return404 = false;
 
                $wgOut->setArticleFlag( true );
 
                # Discourage indexing of printable versions, but encourage following
                if( $wgOut->isPrintable() ) {
                        $policy = 'noindex,follow';
-               } elseif ( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
+               } elseif( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
                        $policy = $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()];
                } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
                        # Honour customised robot policies for this namespace
                        $policy = $wgNamespaceRobotPolicies[$ns];
                } else {
-                       # Default to encourage indexing and following links
-                       $policy = 'index,follow';
+                       $policy = $wgDefaultRobotPolicy;
                }
                $wgOut->setRobotPolicy( $policy );
 
                # If we got diff and oldid in the query, we want to see a
                # diff page instead of the article.
 
-               if ( !is_null( $diff ) ) {
+               if( !is_null( $diff ) ) {
                        $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 
-                       $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
+                       $diff = $wgRequest->getVal( 'diff' );
+                       $htmldiff = $wgRequest->getVal( 'htmldiff' , false);
+                       $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid, $purge, $htmldiff);
                        // DifferenceEngine directly fetched the revision:
                        $this->mRevIdFetched = $de->mNewid;
                        $de->showDiffPage( $diffOnly );
@@ -683,58 +766,36 @@ class Article {
                        return;
                }
 
-               if ( empty( $oldid ) && $this->checkTouched() ) {
-                       $wgOut->setETag($parserCache->getETag($this, $wgUser));
-
-                       if( $wgOut->checkLastModified( $this->mTouched ) ){
-                               wfProfileOut( __METHOD__ );
-                               return;
-                       } else if ( $this->tryFileCache() ) {
-                               # tell wgOut that output is taken care of
-                               $wgOut->disable();
-                               $this->viewUpdates();
-                               wfProfileOut( __METHOD__ );
-                               return;
-                       }
-               }
-
                # Should the parser cache be used?
-               $pcache = $wgEnableParserCache
-                       && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
-                       && $this->exists()
-                       && empty( $oldid )
-                       && !$this->mTitle->isCssOrJsPage()
-                       && !$this->mTitle->isCssJsSubpage();
+               $pcache = $this->useParserCache( $oldid );
                wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
-               if ( $wgUser->getOption( 'stubthreshold' ) ) {
+               if( $wgUser->getOption( 'stubthreshold' ) ) {
                        wfIncrStats( 'pcache_miss_stub' );
                }
 
                $wasRedirected = false;
-               if ( isset( $this->mRedirectedFrom ) ) {
+               if( isset( $this->mRedirectedFrom ) ) {
                        // This is an internally redirected page view.
                        // We'll need a backlink to the source page for navigation.
-                       if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
-                               $sk = $wgUser->getSkin();
+                       if( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
                                $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
-                               $s = wfMsg( 'redirectedfrom', $redir );
+                               $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
                                $wgOut->setSubtitle( $s );
 
                                // Set the fragment if one was specified in the redirect
-                               if ( strval( $this->mTitle->getFragment() ) != '' ) {
+                               if( strval( $this->mTitle->getFragment() ) != '' ) {
                                        $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
                                        $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
                                }
                                $wasRedirected = true;
                        }
-               } elseif ( !empty( $rdfrom ) ) {
+               } elseif( !empty( $rdfrom ) ) {
                        // This is an externally redirected view, from some other wiki.
                        // If it was reported from a trusted site, supply a backlink.
                        global $wgRedirectSources;
                        if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
-                               $sk = $wgUser->getSkin();
                                $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
-                               $s = wfMsg( 'redirectedfrom', $redir );
+                               $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
                                $wgOut->setSubtitle( $s );
                                $wasRedirected = true;
                        }
@@ -742,91 +803,99 @@ class Article {
 
                $outputDone = false;
                wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
-               if ( $pcache ) {
-                       if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
-                               // Ensure that UI elements requiring revision ID have
-                               // the correct version information.
-                               $wgOut->setRevisionId( $this->mLatest );
-                               $outputDone = true;
-                       }
+               if( $pcache && $wgOut->tryParserCache( $this, $wgUser ) ) {
+                       // Ensure that UI elements requiring revision ID have
+                       // the correct version information.
+                       $wgOut->setRevisionId( $this->mLatest );
+                       $outputDone = true;
                }
-               if ( !$outputDone ) {
+               # Fetch content and check for errors
+               if( !$outputDone ) {
+                       # If the article does not exist and was deleted, show the log
+                       if( $this->getID() == 0 ) {
+                               $this->showDeletionLog();
+                       }
                        $text = $this->getContent();
-                       if ( $text === false ) {
+                       if( $text === false ) {
                                # Failed to load, replace text with error message
                                $t = $this->mTitle->getPrefixedText();
                                if( $oldid ) {
-                                       $t .= ',oldid='.$oldid;
-                                       $text = wfMsg( 'missingarticle', $t );
+                                       $d = wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid );
+                                       $text = wfMsg( 'missing-article', $t, $d );
                                } else {
-                                       $text = wfMsg( 'noarticletext', $t );
+                                       $text = wfMsg( 'noarticletext' );
+                               }
+                       }
+                       
+                       # Non-existent pages
+                       if( $this->getID() === 0 ) {
+                               $wgOut->setRobotPolicy( 'noindex,nofollow' );
+                               $text = "<div class='noarticletext'>\n$text\n</div>";
+                               if( !$this->hasViewableContent() ) {
+                                       // If there's no backing content, send a 404 Not Found
+                                       // for better machine handling of broken links.
+                                       $return404 = true;
                                }
+                       } 
+
+                       if( $return404 ) {
+                               $wgRequest->response()->header( "HTTP/1.x 404 Not Found" );
                        }
 
                        # Another whitelist check in case oldid is altering the title
-                       if ( !$this->mTitle->userCanRead() ) {
+                       if( !$this->mTitle->userCanRead() ) {
                                $wgOut->loginToUse();
                                $wgOut->output();
-                               exit;
+                               $wgOut->disable();
+                               wfProfileOut( __METHOD__ );
+                               return;
                        }
+                       
+                       # For ?curid=x urls, disallow indexing
+                       if( $wgRequest->getInt('curid') )
+                               $wgOut->setRobotPolicy( 'noindex,follow' );
 
                        # We're looking at an old revision
-
-                       if ( !empty( $oldid ) ) {
-                               $wgOut->setRobotpolicy( 'noindex,nofollow' );
+                       if( !empty( $oldid ) ) {
+                               $wgOut->setRobotPolicy( 'noindex,nofollow' );
                                if( is_null( $this->mRevision ) ) {
                                        // FIXME: This would be a nice place to load the 'no such page' text.
                                } else {
                                        $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
                                        if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
                                                if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
-                                                       $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
+                                                       $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
                                                        $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
+                                                       wfProfileOut( __METHOD__ );
                                                        return;
                                                } else {
-                                                       $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
+                                                       $wgOut->addWikiMsg( 'rev-deleted-text-view' );
                                                        // and we are allowed to see...
                                                }
                                        }
                                }
-
                        }
-               }
-               if( !$outputDone ) {
+
                        $wgOut->setRevisionId( $this->getRevIdFetched() );
-                       
+
                         // Pages containing custom CSS or JavaScript get special treatment
                        if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
-                               $wgOut->addHtml( wfMsgExt( 'clearyourcache', 'parse' ) );
-
+                               $wgOut->addHTML( wfMsgExt( 'clearyourcache', 'parse' ) );
                                // Give hooks a chance to customise the output
                                if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
                                        // Wrap the whole lot in a <pre> and don't parse
                                        $m = array();
                                        preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
-                                       $wgOut->addHtml( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
-                                       $wgOut->addHtml( htmlspecialchars( $this->mContent ) );
-                                       $wgOut->addHtml( "\n</pre>\n" );
-                               }
-                       
-                       }
-                       
-                       elseif ( $rt = Title::newFromRedirect( $text ) ) {
-                               # Display redirect
-                               $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
-                               $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
-                               # Don't overwrite the subtitle if this was an old revision
-                               if( !$wasRedirected && $this->isCurrent() ) {
-                                       $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
+                                       $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
+                                       $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
+                                       $wgOut->addHTML( "\n</pre>\n" );
                                }
-                               $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
-
-                               $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
-                                 '<span class="redirectText">'.$link.'</span>' );
-
+                       } else if( $rt = Title::newFromRedirect( $text ) ) {
+                               # Don't append the subtitle if this was an old revision
+                               $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
                                $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
                                $wgOut->addParserOutputNoText( $parseout );
-                       } else if ( $pcache ) {
+                       } else if( $pcache ) {
                                # Display content and save to parser cache
                                $this->outputWikiText( $text );
                        } else {
@@ -842,7 +911,7 @@ class Article {
                                $time += wfTime();
 
                                # Timing hack
-                               if ( $time > 3 ) {
+                               if( $time > 3 ) {
                                        wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
                                                $this->mTitle->getPrefixedDBkey()));
                                }
@@ -850,24 +919,30 @@ class Article {
                                if( !$this->isCurrent() ) {
                                        $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
                                }
-
                        }
                }
                /* title may have been set from the cache */
                $t = $wgOut->getPageTitle();
                if( empty( $t ) ) {
                        $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
+
+                       # For the main page, overwrite the <title> element with the con-
+                       # tents of 'pagetitle-view-mainpage' instead of the default (if
+                       # that's not empty).
+                       if( $this->mTitle->equals( Title::newMainPage() ) &&
+                       wfMsgForContent( 'pagetitle-view-mainpage' ) !== '' ) {
+                               $wgOut->setHTMLTitle( wfMsgForContent( 'pagetitle-view-mainpage' ) );
+                       }
                }
 
                # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
-               if( $ns == NS_USER_TALK &&
-                       User::isIP( $this->mTitle->getText() ) ) {
-                       $wgOut->addWikiText( wfMsg('anontalkpagetext') );
+               if( $ns == NS_USER_TALK && IP::isValid( $this->mTitle->getText() ) ) {
+                       $wgOut->addWikiMsg('anontalkpagetext');
                }
 
                # If we have been passed an &rcid= parameter, we want to give the user a
                # chance to mark this new article as patrolled.
-               if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
+               if( !empty($rcid) && $this->mTitle->exists() && $this->mTitle->userCan('patrol') ) {
                        $wgOut->addHTML(
                                "<div class='patrollink'>" .
                                        wfMsgHtml( 'markaspatrolledlink',
@@ -879,34 +954,97 @@ class Article {
                }
 
                # Trackbacks
-               if ($wgUseTrackbacks)
+               if( $wgUseTrackbacks ) {
                        $this->addTrackbacks();
+               }
 
                $this->viewUpdates();
                wfProfileOut( __METHOD__ );
        }
+       
+       protected function showDeletionLog() {
+               global $wgUser, $wgOut;
+               $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut );
+               $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
+               if( $pager->getNumRows() > 0 ) {
+                       $pager->mLimit = 10;
+                       $wgOut->addHTML( '<div class="mw-warning-with-logexcerpt">' );
+                       $wgOut->addWikiMsg( 'deleted-notice' );
+                       $wgOut->addHTML(
+                               $loglist->beginLogEventsList() .
+                               $pager->getBody() .
+                               $loglist->endLogEventsList()
+                       );
+                       if( $pager->getNumRows() > 10 ) {
+                               $wgOut->addHTML( $wgUser->getSkin()->link(
+                                       SpecialPage::getTitleFor( 'Log' ),
+                                       wfMsgHtml( 'deletelog-fulllog' ),
+                                       array(),
+                                       array( 'type' => 'delete', 'page' => $this->mTitle->getPrefixedText() ) 
+                               ) );
+                       }
+                       $wgOut->addHTML( '</div>' );
+               }
+       }
 
-       function addTrackbacks() {
-               global $wgOut, $wgUser;
+       /*
+       * Should the parser cache be used?
+       */
+       protected function useParserCache( $oldid ) {
+               global $wgUser, $wgEnableParserCache;
 
-               $dbr = wfGetDB(DB_SLAVE);
-               $tbs = $dbr->select(
-                               /* FROM   */ 'trackbacks',
-                               /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
-                               /* WHERE  */ array('tb_page' => $this->getID())
-               );
+               return $wgEnableParserCache
+                       && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
+                       && $this->exists()
+                       && empty( $oldid )
+                       && !$this->mTitle->isCssOrJsPage()
+                       && !$this->mTitle->isCssJsSubpage();
+       }
 
-               if (!$dbr->numrows($tbs))
-                       return;
+       /**
+        * View redirect
+        * @param $target Title object of destination to redirect
+        * @param $appendSubtitle Boolean [optional]
+        * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
+        */
+       public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
+               global $wgParser, $wgOut, $wgContLang, $wgStylePath, $wgUser;
+               # Display redirect
+               $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
+               $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
+
+               if( $appendSubtitle ) {
+                       $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
+               }
+               $sk = $wgUser->getSkin();
+               if( $forceKnown ) {
+                       $link = $sk->makeKnownLinkObj( $target, htmlspecialchars( $target->getFullText() ) );
+               } else {
+                       $link = $sk->makeLinkObj( $target, htmlspecialchars( $target->getFullText() ) );
+               }
+               return '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
+                       '<span class="redirectText">'.$link.'</span>';
+
+       }
+
+       public function addTrackbacks() {
+               global $wgOut, $wgUser;
+               $dbr = wfGetDB( DB_SLAVE );
+               $tbs = $dbr->select( 'trackbacks',
+                       array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
+                       array('tb_page' => $this->getID() )
+               );
+               if( !$dbr->numRows($tbs) ) return;
 
                $tbtext = "";
-               while ($o = $dbr->fetchObject($tbs)) {
+               while( $o = $dbr->fetchObject($tbs) ) {
                        $rmvtxt = "";
-                       if ($wgUser->isAllowed( 'trackback' )) {
-                               $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
-                                               . $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
+                       if( $wgUser->isAllowed( 'trackback' ) ) {
+                               $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid=" .
+                                       $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
                                $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
                        }
+                       $tbtext .= "\n";
                        $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
                                        $o->tb_title,
                                        $o->tb_url,
@@ -914,36 +1052,32 @@ class Article {
                                        $o->tb_name,
                                        $rmvtxt);
                }
-               $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
+               $wgOut->addWikiMsg( 'trackbackbox', $tbtext );
+               $this->mTitle->invalidateCache();
        }
 
-       function deletetrackback() {
+       public function deletetrackback() {
                global $wgUser, $wgRequest, $wgOut, $wgTitle;
-
-               if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
-                       $wgOut->addWikitext(wfMsg('sessionfailure'));
+               if( !$wgUser->matchEditToken($wgRequest->getVal('token')) ) {
+                       $wgOut->addWikiMsg( 'sessionfailure' );
                        return;
                }
 
-               if ((!$wgUser->isAllowed('delete'))) {
-                       $wgOut->permissionRequired( 'delete' );
+               $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
+               if( count($permission_errors) ) {
+                       $wgOut->showPermissionsErrorPage( $permission_errors );
                        return;
                }
 
-               if (wfReadOnly()) {
-                       $wgOut->readOnlyPage();
-                       return;
-               }
+               $db = wfGetDB( DB_MASTER );
+               $db->delete( 'trackbacks', array('tb_id' => $wgRequest->getInt('tbid')) );
 
-               $db = wfGetDB(DB_MASTER);
-               $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
-               $wgTitle->invalidateCache();
-               $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
+               $wgOut->addWikiMsg( 'trackbackdeleteok' );
+               $this->mTitle->invalidateCache();
        }
 
-       function render() {
+       public function render() {
                global $wgOut;
-
                $wgOut->setArticleBodyOnly(true);
                $this->view();
        }
@@ -951,37 +1085,36 @@ class Article {
        /**
         * Handle action=purge
         */
-       function purge() {
+       public function purge() {
                global $wgUser, $wgRequest, $wgOut;
-
-               if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
+               if( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
                        if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
                                $this->doPurge();
+                               $this->view();
                        }
                } else {
-                       $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
-                       $action = $this->mTitle->escapeLocalURL( 'action=purge' );
-                       $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
-                       $msg = str_replace( '$1',
-                               "<form method=\"post\" action=\"$action\">\n" .
-                               "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
-                               "</form>\n", $msg );
-
+                       $action = htmlspecialchars( $wgRequest->getRequestURL() );
+                       $button = wfMsgExt( 'confirm_purge_button', array('escapenoentities') );
+                       $form = "<form method=\"post\" action=\"$action\">\n" .
+                                       "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
+                                       "</form>\n";
+                       $top = wfMsgExt( 'confirm-purge-top', array('parse') );
+                       $bottom = wfMsgExt( 'confirm-purge-bottom', array('parse') );
                        $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
-                       $wgOut->setRobotpolicy( 'noindex,nofollow' );
-                       $wgOut->addHTML( $msg );
+                       $wgOut->setRobotPolicy( 'noindex,nofollow' );
+                       $wgOut->addHTML( $top . $form . $bottom );
                }
        }
 
        /**
         * Perform the actions of a page purging
         */
-       function doPurge() {
+       public function doPurge() {
                global $wgUseSquid;
                // Invalidate the cache
                $this->mTitle->invalidateCache();
 
-               if ( $wgUseSquid ) {
+               if( $wgUseSquid ) {
                        // Commit the transaction before the purge is sent
                        $dbw = wfGetDB( DB_MASTER );
                        $dbw->immediateCommit();
@@ -990,7 +1123,15 @@ class Article {
                        $update = SquidUpdate::newSimplePurge( $this->mTitle );
                        $update->doUpdate();
                }
-               $this->view();
+               if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
+                       global $wgMessageCache;
+                       if( $this->getID() == 0 ) {
+                               $text = false;
+                       } else {
+                               $text = $this->getContent();
+                       }
+                       $wgMessageCache->replace( $this->mTitle->getDBkey(), $text );
+               }
        }
 
        /**
@@ -1000,11 +1141,11 @@ class Article {
         * or else the record will be left in a funky state.
         * Best if all done inside a transaction.
         *
-        * @param Database $dbw
-        * @return int     The newly created page_id key
+        * @param $dbw Database
+        * @return int The newly created page_id key, or false if the title already existed
         * @private
         */
-       function insertOn( $dbw ) {
+       public function insertOn( $dbw ) {
                wfProfileIn( __METHOD__ );
 
                $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
@@ -1020,31 +1161,33 @@ class Article {
                        'page_touched'      => $dbw->timestamp(),
                        'page_latest'       => 0, # Fill this in shortly...
                        'page_len'          => 0, # Fill this in shortly...
-               ), __METHOD__ );
-               $newid = $dbw->insertId();
-
-               $this->mTitle->resetArticleId( $newid );
+               ), __METHOD__, 'IGNORE' );
 
+               $affected = $dbw->affectedRows();
+               if( $affected ) {
+                       $newid = $dbw->insertId();
+                       $this->mTitle->resetArticleId( $newid );
+               }
                wfProfileOut( __METHOD__ );
-               return $newid;
+               return $affected ? $newid : false;
        }
 
        /**
         * Update the page record to point to a newly saved revision.
         *
-        * @param Database $dbw
-        * @param Revision $revision For ID number, and text used to set
-                                    length and redirect status fields
-        * @param int $lastRevision If given, will not overwrite the page field
-        *                          when different from the currently set value.
-        *                          Giving 0 indicates the new page flag should
-        *                          be set on.
-        * @param bool $lastRevIsRedirect If given, will optimize adding and
-        *                                                      removing rows in redirect table.
+        * @param $dbw Database object
+        * @param $revision Revision: For ID number, and text used to set
+                           length and redirect status fields
+        * @param $lastRevision Integer: if given, will not overwrite the page field
+        *                      when different from the currently set value.
+        *                      Giving 0 indicates the new page flag should be set
+        *                      on.
+        * @param $lastRevIsRedirect Boolean: if given, will optimize adding and
+        *                                                       removing rows in redirect table.
         * @return bool true on success, false on failure
         * @private
         */
-       function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
+       public function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
                wfProfileIn( __METHOD__ );
 
                $text = $revision->getText();
@@ -1068,9 +1211,7 @@ class Article {
                        __METHOD__ );
 
                $result = $dbw->affectedRows() != 0;
-
-               if ($result) {
-                       // FIXME: Should the result from updateRedirectOn() be returned instead?
+               if( $result ) {
                        $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
                }
 
@@ -1081,44 +1222,40 @@ class Article {
        /**
         * Add row to the redirect table if this is a redirect, remove otherwise.
         *
-        * @param Database $dbw
+        * @param $dbw Database
         * @param $redirectTitle a title object pointing to the redirect target,
-        *                                                      or NULL if this is not a redirect
-        * @param bool $lastRevIsRedirect If given, will optimize adding and
-        *                                                      removing rows in redirect table.
+        *                                               or NULL if this is not a redirect
+        * @param $lastRevIsRedirect If given, will optimize adding and
+        *                                                       removing rows in redirect table.
         * @return bool true on success, false on failure
         * @private
         */
-       function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
-
+       public function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
                // Always update redirects (target link might have changed)
                // Update/Insert if we don't know if the last revision was a redirect or not
                // Delete if changing from redirect to non-redirect
                $isRedirect = !is_null($redirectTitle);
-               if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
-
+               if($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
                        wfProfileIn( __METHOD__ );
-
-                       if ($isRedirect) {
-
+                       if( $isRedirect ) {
                                // This title is a redirect, Add/Update row in the redirect table
                                $set = array( /* SET */
                                        'rd_namespace' => $redirectTitle->getNamespace(),
                                        'rd_title'     => $redirectTitle->getDBkey(),
                                        'rd_from'      => $this->getId(),
                                );
-
                                $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
                        } else {
                                // This is not a redirect, remove row from redirect table
                                $where = array( 'rd_from' => $this->getId() );
                                $dbw->delete( 'redirect', $where, __METHOD__);
                        }
-
+                       if( $this->getTitle()->getNamespace() == NS_FILE ) {
+                               RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
+                       }
                        wfProfileOut( __METHOD__ );
                        return ( $dbw->affectedRows() != 0 );
                }
-
                return true;
        }
 
@@ -1126,12 +1263,11 @@ class Article {
         * If the given revision is newer than the currently set page_latest,
         * update the page record. Otherwise, do nothing.
         *
-        * @param Database $dbw
-        * @param Revision $revision
+        * @param $dbw Database object
+        * @param $revision Revision object
         */
-       function updateIfNewerOn( &$dbw, $revision ) {
+       public function updateIfNewerOn( &$dbw, $revision ) {
                wfProfileIn( __METHOD__ );
-
                $row = $dbw->selectRow(
                        array( 'revision', 'page' ),
                        array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
@@ -1151,28 +1287,27 @@ class Article {
                        $prev = 0;
                        $lastRevIsRedirect = null;
                }
-
                $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
                wfProfileOut( __METHOD__ );
                return $ret;
        }
 
        /**
+        * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...)
         * @return string Complete article text, or null if error
         */
-       function replaceSection($section, $text, $summary = '', $edittime = NULL) {
+       public function replaceSection( $section, $text, $summary = '', $edittime = NULL ) {
                wfProfileIn( __METHOD__ );
-
-               if( $section == '' ) {
-                       // Whole-page edit; let the text through unmolested.
+               if( strval( $section ) == '' ) {
+                       // Whole-page edit; let the whole text through
                } else {
-                       if( is_null( $edittime ) ) {
+                       if( is_null($edittime) ) {
                                $rev = Revision::newFromTitle( $this->mTitle );
                        } else {
                                $dbw = wfGetDB( DB_MASTER );
                                $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
                        }
-                       if( is_null( $rev ) ) {
+                       if( !$rev ) {
                                wfDebug( "Article::replaceSection asked for bogus section (page: " .
                                        $this->getId() . "; section: $section; edittime: $edittime)\n" );
                                return null;
@@ -1190,9 +1325,7 @@ class Article {
                                global $wgParser;
                                $text = $wgParser->replaceSection( $oldtext, $section, $text );
                        }
-
                }
-
                wfProfileOut( __METHOD__ );
                return $text;
        }
@@ -1200,27 +1333,29 @@ class Article {
        /**
         * @deprecated use Article::doEdit()
         */
-       function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
+       function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false, $bot=false ) {
+               wfDeprecated( __METHOD__ );
                $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
                        ( $isminor ? EDIT_MINOR : 0 ) |
-                       ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
+                       ( $suppressRC ? EDIT_SUPPRESS_RC : 0 ) |
+                       ( $bot ? EDIT_FORCE_BOT : 0 );
 
                # If this is a comment, add the summary as headline
-               if ( $comment && $summary != "" ) {
+               if( $comment && $summary != "" ) {
                        $text = wfMsgForContent('newsectionheaderdefaultlevel',$summary) . "\n\n".$text;
                }
 
                $this->doEdit( $text, $summary, $flags );
 
                $dbw = wfGetDB( DB_MASTER );
-               if ($watchthis) {
-                       if (!$this->mTitle->userIsWatching()) {
+               if($watchthis) {
+                       if(!$this->mTitle->userIsWatching()) {
                                $dbw->begin();
                                $this->doWatch();
                                $dbw->commit();
                        }
                } else {
-                       if ( $this->mTitle->userIsWatching() ) {
+                       if( $this->mTitle->userIsWatching() ) {
                                $dbw->begin();
                                $this->doUnwatch();
                                $dbw->commit();
@@ -1233,33 +1368,36 @@ class Article {
         * @deprecated use Article::doEdit()
         */
        function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
+               wfDeprecated( __METHOD__ );
                $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
                        ( $minor ? EDIT_MINOR : 0 ) |
                        ( $forceBot ? EDIT_FORCE_BOT : 0 );
 
-               $good = $this->doEdit( $text, $summary, $flags );
-               if ( $good ) {
-                       $dbw = wfGetDB( DB_MASTER );
-                       if ($watchthis) {
-                               if (!$this->mTitle->userIsWatching()) {
-                                       $dbw->begin();
-                                       $this->doWatch();
-                                       $dbw->commit();
-                               }
-                       } else {
-                               if ( $this->mTitle->userIsWatching() ) {
-                                       $dbw->begin();
-                                       $this->doUnwatch();
-                                       $dbw->commit();
-                               }
+               $status = $this->doEdit( $text, $summary, $flags );
+               if( !$status->isOK() ) {
+                       return false;
+               }
+
+               $dbw = wfGetDB( DB_MASTER );
+               if( $watchthis ) {
+                       if(!$this->mTitle->userIsWatching()) {
+                               $dbw->begin();
+                               $this->doWatch();
+                               $dbw->commit();
                        }
+               } else {
+                       if( $this->mTitle->userIsWatching() ) {
+                               $dbw->begin();
+                               $this->doUnwatch();
+                               $dbw->commit();
+                       }
+               }
 
-                       $extraq = ''; // Give extensions a chance to modify URL query on update
-                       wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraq ) );
+               $extraQuery = ''; // Give extensions a chance to modify URL query on update
+               wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraQuery ) );
 
-                       $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraq );
-               }
-               return $good;
+               $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraQuery );
+               return true;
        }
 
        /**
@@ -1270,9 +1408,9 @@ class Article {
         *
         * $wgUser must be set before calling this function.
         *
-        * @param string $text New text
-        * @param string $summary Edit summary
-        * @param integer $flags bitfield:
+        * @param $text String: new text
+        * @param $summary String: edit summary
+        * @param $flags Integer bitfield:
         *      EDIT_NEW
         *          Article is known or assumed to be non-existent, create a new one
         *      EDIT_UPDATE
@@ -1289,114 +1427,162 @@ class Article {
         *          Fill in blank summaries with generated text where possible
         *
         * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
-        * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
-        * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
-        * to be thrown from the Database. These two conditions are also possible with auto-detection due
-        * to MediaWiki's performance-optimised locking strategy.
+        * If EDIT_UPDATE is specified and the article doesn't exist, the function will an 
+        * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an 
+        * edit-already-exists error will be returned. These two conditions are also possible with 
+        * auto-detection due to MediaWiki's performance-optimised locking strategy.
         *
-        * @return bool success
+        * @param $baseRevId the revision ID this edit was based off, if any
+        * @param $user Optional user object, $wgUser will be used if not passed
+        *
+        * @return Status object. Possible errors:
+        *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
+        *     edit-gone-missing:       In update mode, but the article didn't exist
+        *     edit-conflict:           In update mode, the article changed unexpectedly
+        *     edit-no-change:          Warning that the text was the same as before
+        *     edit-already-exists:     In creation mode, but the article already exists
+        *
+        *  Extensions may define additional errors.
+        *
+        *  $return->value will contain an associative array with members as follows:
+        *     new:                     Boolean indicating if the function attempted to create a new article
+        *     revision:                The revision object for the inserted revision, or null
+        *
+        *  Compatibility note: this function previously returned a boolean value indicating success/failure
         */
-       function doEdit( $text, $summary, $flags = 0 ) {
-               global $wgUser, $wgDBtransactions;
+       public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
+               global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
+
+               # Low-level sanity check
+               if( $this->mTitle->getText() == '' ) {
+                       throw new MWException( 'Something is trying to edit an article with an empty title' );
+               }
 
                wfProfileIn( __METHOD__ );
-               $good = true;
 
-               if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
-                       $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
-                       if ( $aid ) {
+               $user = is_null($user) ? $wgUser : $user;
+               $status = Status::newGood( array() );
+
+               # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
+               $this->loadPageData(); 
+
+               if( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
+                       $aid = $this->mTitle->getArticleID();
+                       if( $aid ) {
                                $flags |= EDIT_UPDATE;
                        } else {
                                $flags |= EDIT_NEW;
                        }
                }
 
-               if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
-                       &$summary, $flags & EDIT_MINOR,
-                       null, null, &$flags ) ) )
+               if( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary,
+                       $flags & EDIT_MINOR, null, null, &$flags, &$status ) ) )
                {
                        wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
                        wfProfileOut( __METHOD__ );
-                       return false;
+                       if( $status->isOK() ) {
+                               $status->fatal( 'edit-hook-aborted');
+                       }
+                       return $status;
                }
 
                # Silently ignore EDIT_MINOR if not allowed
-               $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
-               $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
+               $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed('minoredit');
+               $bot = $flags & EDIT_FORCE_BOT;
 
                $oldtext = $this->getContent();
                $oldsize = strlen( $oldtext );
 
-               # Provide autosummaries if one is not provided.
-               if ($flags & EDIT_AUTOSUMMARY && $summary == '')
+               # Provide autosummaries if one is not provided and autosummaries are enabled.
+               if( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
                        $summary = $this->getAutosummary( $oldtext, $text, $flags );
+               }
 
-               $text = $this->preSaveTransform( $text );
+               $editInfo = $this->prepareTextForEdit( $text );
+               $text = $editInfo->pst;
                $newsize = strlen( $text );
 
                $dbw = wfGetDB( DB_MASTER );
                $now = wfTimestampNow();
 
-               if ( $flags & EDIT_UPDATE ) {
+               if( $flags & EDIT_UPDATE ) {
                        # Update article, but only if changed.
-
+                       $status->value['new'] = false;
                        # Make sure the revision is either completely inserted or not inserted at all
                        if( !$wgDBtransactions ) {
                                $userAbort = ignore_user_abort( true );
                        }
 
-                       $lastRevision = 0;
                        $revisionId = 0;
 
-                       if ( 0 != strcmp( $text, $oldtext ) ) {
+                       $changed = ( strcmp( $text, $oldtext ) != 0 );
+
+                       if( $changed ) {
                                $this->mGoodAdjustment = (int)$this->isCountable( $text )
                                  - (int)$this->isCountable( $oldtext );
                                $this->mTotalAdjustment = 0;
 
-                               $lastRevision = $dbw->selectField(
-                                       'page', 'page_latest', array( 'page_id' => $this->getId() ) );
-
-                               if ( !$lastRevision ) {
+                               if( !$this->mLatest ) {
                                        # Article gone missing
                                        wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
+                                       $status->fatal( 'edit-gone-missing' );
                                        wfProfileOut( __METHOD__ );
-                                       return false;
+                                       return $status;
                                }
 
                                $revision = new Revision( array(
                                        'page'       => $this->getId(),
                                        'comment'    => $summary,
                                        'minor_edit' => $isminor,
-                                       'text'       => $text
+                                       'text'       => $text,
+                                       'parent_id'  => $this->mLatest,
+                                       'user'       => $user->getId(),
+                                       'user_text'  => $user->getName(),
                                        ) );
 
                                $dbw->begin();
                                $revisionId = $revision->insertOn( $dbw );
 
                                # Update page
-                               $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
+                               #
+                               # Note that we use $this->mLatest instead of fetching a value from the master DB 
+                               # during the course of this function. This makes sure that EditPage can detect 
+                               # edit conflicts reliably, either by $ok here, or by $article->getTimestamp() 
+                               # before this function is called. A previous function used a separate query, this
+                               # creates a window where concurrent edits can cause an ignored edit conflict.
+                               $ok = $this->updateRevisionOn( $dbw, $revision, $this->mLatest );
 
                                if( !$ok ) {
                                        /* Belated edit conflict! Run away!! */
-                                       $good = false;
+                                       $status->fatal( 'edit-conflict' );
+                                       # Delete the invalid revision if the DB is not transactional
+                                       if( !$wgDBtransactions ) {
+                                               $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
+                                       }
+                                       $revisionId = 0;
                                        $dbw->rollback();
                                } else {
+                                       global $wgUseRCPatrol;
+                                       wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, $baseRevId, $user) );
                                        # Update recentchanges
                                        if( !( $flags & EDIT_SUPPRESS_RC ) ) {
-                                               $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
-                                                       $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
-                                                       $revisionId );
-
                                                # Mark as patrolled if the user can do so
-                                               if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
-                                                       RecentChange::markPatrolled( $rcid );
-                                                       PatrolLog::record( $rcid, true );
+                                               $patrolled = $wgUseRCPatrol && $this->mTitle->userCan('autopatrol');
+                                               # Add RC row to the DB
+                                               $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
+                                                       $this->mLatest, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
+                                                       $revisionId, $patrolled
+                                               );
+                                               # Log auto-patrolled edits
+                                               if( $patrolled ) {
+                                                       PatrolLog::record( $rc, true );
                                                }
                                        }
-                                       $wgUser->incEditCount();
+                                       $user->incEditCount();
                                        $dbw->commit();
                                }
                        } else {
+                               $status->warning( 'edit-no-change' );
                                $revision = null;
                                // Keep the same revision ID, but do some updates on it
                                $revisionId = $this->getRevIdFetched();
@@ -1408,18 +1594,20 @@ class Article {
                        if( !$wgDBtransactions ) {
                                ignore_user_abort( $userAbort );
                        }
-
-                       if ( $good ) {
-                               # Invalidate cache of this article and all pages using this article
-                               # as a template. Partly deferred.
-                               Article::onArticleEdit( $this->mTitle );
-
-                               # Update links tables, site stats, etc.
-                               $changed = ( strcmp( $oldtext, $text ) != 0 );
-                               $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
+                       // Now that ignore_user_abort is restored, we can respond to fatal errors
+                       if( !$status->isOK() ) {
+                               wfProfileOut( __METHOD__ );
+                               return $status;
                        }
+
+                       # Invalidate cache of this article and all pages using this article
+                       # as a template. Partly deferred. Leave templatelinks for editUpdates().
+                       Article::onArticleEdit( $this->mTitle, 'skiptransclusions' );
+                       # Update links tables, site stats, etc.
+                       $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
                } else {
                        # Create new article
+                       $status->value['new'] = true;
 
                        # Set statistics members
                        # We work out if it's countable after PST to avoid counter drift
@@ -1430,15 +1618,24 @@ class Article {
                        $dbw->begin();
 
                        # Add the page record; stake our claim on this title!
-                       # This will fail with a database query exception if the article already exists
+                       # This will return false if the article already exists
                        $newid = $this->insertOn( $dbw );
 
+                       if( $newid === false ) {
+                               $dbw->rollback();
+                               $status->fatal( 'edit-already-exists' );
+                               wfProfileOut( __METHOD__ );
+                               return $status;
+                       }
+
                        # Save the revision text...
                        $revision = new Revision( array(
                                'page'       => $newid,
                                'comment'    => $summary,
                                'minor_edit' => $isminor,
-                               'text'       => $text
+                               'text'       => $text,
+                               'user'       => $user->getId(),
+                               'user_text'  => $user->getName(),
                                ) );
                        $revisionId = $revision->insertOn( $dbw );
 
@@ -1447,16 +1644,21 @@ class Article {
                        # Update the page record with revision data
                        $this->updateRevisionOn( $dbw, $revision, 0 );
 
+                       wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, false, $user) );
+                       # Update recentchanges
                        if( !( $flags & EDIT_SUPPRESS_RC ) ) {
-                               $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
-                                 '', strlen( $text ), $revisionId );
-                               # Mark as patrolled if the user can
-                               if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
-                                       RecentChange::markPatrolled( $rcid );
-                                       PatrolLog::record( $rcid, true );
+                               global $wgUseRCPatrol, $wgUseNPPatrol;
+                               # Mark as patrolled if the user can do so
+                               $patrolled = ($wgUseRCPatrol || $wgUseNPPatrol) && $this->mTitle->userCan('autopatrol');
+                               # Add RC row to the DB
+                               $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
+                                       '', strlen($text), $revisionId, $patrolled );
+                               # Log auto-patrolled edits
+                               if( $patrolled ) {
+                                       PatrolLog::record( $rc, true );
                                }
                        }
-                       $wgUser->incEditCount();
+                       $user->incEditCount();
                        $dbw->commit();
 
                        # Update links, etc.
@@ -1465,27 +1667,30 @@ class Article {
                        # Clear caches
                        Article::onArticleCreate( $this->mTitle );
 
-                       wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text, $summary,
-                        $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
+                       wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
+                               $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
                }
 
-               if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
+               # Do updates right now unless deferral was requested
+               if( !( $flags & EDIT_DEFER_UPDATES ) ) {
                        wfDoUpdates();
                }
 
-               if ( $good ) {
-                       wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary,
-                               $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
-               }
+               // Return the new revision (or null) to the caller
+               $status->value['revision'] = $revision;
+
+               wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
+                       $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status ) );
 
                wfProfileOut( __METHOD__ );
-               return $good;
+               return $status;
        }
 
        /**
         * @deprecated wrapper for doRedirect
         */
-       function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
+       public function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
+               wfDeprecated( __METHOD__ );
                $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
        }
 
@@ -1493,79 +1698,69 @@ class Article {
         * Output a redirect back to the article.
         * This is typically used after an edit.
         *
-        * @param boolean $noRedir Add redirect=no
-        * @param string $sectionAnchor section to redirect to, including "#"
+        * @param $noRedir Boolean: add redirect=no
+        * @param $sectionAnchor String: section to redirect to, including "#"
+        * @param $extraQuery String: extra query params
         */
-       function doRedirect( $noRedir = false, $sectionAnchor = '', $extraq = '' ) {
+       public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
                global $wgOut;
-               if ( $noRedir ) {
+               if( $noRedir ) {
                        $query = 'redirect=no';
-                       if( $extraq )
+                       if( $extraQuery )
                                $query .= "&$query";
                } else {
-                       $query = $extraq;
+                       $query = $extraQuery;
                }
                $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
        }
 
        /**
-        * Mark this particular edit as patrolled
+        * Mark this particular edit/page as patrolled
         */
-       function markpatrolled() {
-               global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
+       public function markpatrolled() {
+               global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUseNPPatrol, $wgUser;
                $wgOut->setRobotPolicy( 'noindex,nofollow' );
 
-               # Check RC patrol config. option
-               if( !$wgUseRCPatrol ) {
-                       $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
+               # If we haven't been given an rc_id value, we can't do anything
+               $rcid = (int) $wgRequest->getVal('rcid');
+               $rc = RecentChange::newFromId($rcid);
+               if( is_null($rc) ) {
+                       $wgOut->showErrorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
                        return;
                }
 
-               # Check permissions
-               if( !$wgUser->isAllowed( 'patrol' ) ) {
-                       $wgOut->permissionRequired( 'patrol' );
+               #It would be nice to see where the user had actually come from, but for now just guess
+               $returnto = $rc->getAttribute( 'rc_type' ) == RC_NEW ? 'Newpages' : 'Recentchanges';
+               $return = Title::makeTitle( NS_SPECIAL, $returnto );
+
+               $dbw = wfGetDB( DB_MASTER );
+               $errors = $rc->doMarkPatrolled();
+
+               if( in_array(array('rcpatroldisabled'), $errors) ) {
+                       $wgOut->showErrorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
                        return;
                }
-
-               # If we haven't been given an rc_id value, we can't do anything
-               $rcid = $wgRequest->getVal( 'rcid' );
-               if( !$rcid ) {
-                       $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
+               
+               if( in_array(array('hookaborted'), $errors) ) {
+                       // The hook itself has handled any output
+                       return;
+               }
+               
+               if( in_array(array('markedaspatrollederror-noautopatrol'), $errors) ) {
+                       $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
+                       $wgOut->addWikiMsg( 'markedaspatrollederror-noautopatrol' );
+                       $wgOut->returnToMain( false, $return );
                        return;
                }
 
-               # Handle the 'MarkPatrolled' hook
-               if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
+               if( !empty($errors) ) {
+                       $wgOut->showPermissionsErrorPage( $errors );
                        return;
                }
 
-               $return = SpecialPage::getTitleFor( 'Recentchanges' );
-               # If it's left up to us, check that the user is allowed to patrol this edit
-               # If the user has the "autopatrol" right, then we'll assume there are no
-               # other conditions stopping them doing so
-               if( !$wgUser->isAllowed( 'autopatrol' ) ) {
-                       $rc = RecentChange::newFromId( $rcid );
-                       # Graceful error handling, as we've done before here...
-                       # (If the recent change doesn't exist, then it doesn't matter whether
-                       # the user is allowed to patrol it or not; nothing is going to happen
-                       if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
-                               # The user made this edit, and can't patrol it
-                               # Tell them so, and then back off
-                               $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
-                               $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
-                               $wgOut->returnToMain( false, $return );
-                               return;
-                       }
-               }
-
-               # Mark the edit as patrolled
-               RecentChange::markPatrolled( $rcid );
-               PatrolLog::record( $rcid );
-               wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
-
                # Inform the user
                $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
-               $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
+               $wgOut->addWikiMsg( 'markedaspatrolledtext' );
                $wgOut->returnToMain( false, $return );
        }
 
@@ -1573,28 +1768,21 @@ class Article {
         * User-interface handler for the "watch" action
         */
 
-       function watch() {
-
+       public function watch() {
                global $wgUser, $wgOut;
-
-               if ( $wgUser->isAnon() ) {
+               if( $wgUser->isAnon() ) {
                        $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
                        return;
                }
-               if ( wfReadOnly() ) {
+               if( wfReadOnly() ) {
                        $wgOut->readOnlyPage();
                        return;
                }
-
                if( $this->doWatch() ) {
                        $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
-                       $wgOut->setRobotpolicy( 'noindex,nofollow' );
-
-                       $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
-                       $text = wfMsg( 'addedwatchtext', $link );
-                       $wgOut->addWikiText( $text );
+                       $wgOut->setRobotPolicy( 'noindex,nofollow' );
+                       $wgOut->addWikiMsg( 'addedwatchtext', $this->mTitle->getPrefixedText() );
                }
-
                $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
        }
 
@@ -1602,46 +1790,36 @@ class Article {
         * Add this page to $wgUser's watchlist
         * @return bool true on successful watch operation
         */
-       function doWatch() {
+       public function doWatch() {
                global $wgUser;
                if( $wgUser->isAnon() ) {
                        return false;
                }
-
-               if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
+               if( wfRunHooks('WatchArticle', array(&$wgUser, &$this)) ) {
                        $wgUser->addWatch( $this->mTitle );
-
                        return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
                }
-
                return false;
        }
 
        /**
         * User interface handler for the "unwatch" action.
         */
-       function unwatch() {
-
+       public function unwatch() {
                global $wgUser, $wgOut;
-
-               if ( $wgUser->isAnon() ) {
+               if( $wgUser->isAnon() ) {
                        $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
                        return;
                }
-               if ( wfReadOnly() ) {
+               if( wfReadOnly() ) {
                        $wgOut->readOnlyPage();
                        return;
                }
-
                if( $this->doUnwatch() ) {
                        $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
-                       $wgOut->setRobotpolicy( 'noindex,nofollow' );
-
-                       $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
-                       $text = wfMsg( 'removedwatchtext', $link );
-                       $wgOut->addWikiText( $text );
+                       $wgOut->setRobotPolicy( 'noindex,nofollow' );
+                       $wgOut->addWikiMsg( 'removedwatchtext', $this->mTitle->getPrefixedText() );
                }
-
                $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
        }
 
@@ -1649,25 +1827,22 @@ class Article {
         * Stop watching a page
         * @return bool true on successful unwatch
         */
-       function doUnwatch() {
+       public function doUnwatch() {
                global $wgUser;
                if( $wgUser->isAnon() ) {
                        return false;
                }
-
-               if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
+               if( wfRunHooks('UnwatchArticle', array(&$wgUser, &$this)) ) {
                        $wgUser->removeWatch( $this->mTitle );
-
                        return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
                }
-
                return false;
        }
 
        /**
         * action=protect handler
         */
-       function protect() {
+       public function protect() {
                $form = new ProtectionForm( $this );
                $form->execute();
        }
@@ -1675,26 +1850,28 @@ class Article {
        /**
         * action=unprotect handler (alias)
         */
-       function unprotect() {
+       public function unprotect() {
                $this->protect();
        }
 
        /**
         * Update the article's restriction field, and leave a log entry.
         *
-        * @param array $limit set of restriction keys
-        * @param string $reason
+        * @param $limit Array: set of restriction keys
+        * @param $reason String
+        * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
+        * @param $expiry Array: per restriction type expiration
         * @return bool true on success
         */
-       function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = null ) {
+       public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
                global $wgUser, $wgRestrictionTypes, $wgContLang;
 
                $id = $this->mTitle->getArticleID();
-               if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
+               if( $id <= 0 || wfReadOnly() || !$this->mTitle->userCan('protect') ) {
                        return false;
                }
 
-               if (!$cascade) {
+               if( !$cascade ) {
                        $cascade = false;
                }
 
@@ -1704,76 +1881,103 @@ class Article {
                # FIXME: Same limitations as described in ProtectionForm.php (line 37);
                # we expect a single selection, but the schema allows otherwise.
                $current = array();
-               foreach( $wgRestrictionTypes as $action )
-                       $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
+               $updated = Article::flattenRestrictions( $limit );
+               $changed = false;
+               foreach( $wgRestrictionTypes as $action ) {
+                       if( isset( $expiry[$action] ) ) {
+                               # Get current restrictions on $action
+                               $aLimits = $this->mTitle->getRestrictions( $action );
+                               $current[$action] = implode( '', $aLimits );
+                               # Are any actual restrictions being dealt with here?
+                               $aRChanged = count($aLimits) || !empty($limit[$action]);
+                               # If something changed, we need to log it. Checking $aRChanged
+                               # assures that "unprotecting" a page that is not protected does
+                               # not log just because the expiry was "changed".
+                               if( $aRChanged && $this->mTitle->mRestrictionsExpiry[$action] != $expiry[$action] ) {
+                                       $changed = true;
+                               }
+                       }
+               }
 
                $current = Article::flattenRestrictions( $current );
-               $updated = Article::flattenRestrictions( $limit );
 
-               $changed = ( $current != $updated );
-               $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
-               $changed = $changed || ($this->mTitle->mRestrictionsExpiry != $expiry);
+               $changed = ($changed || $current != $updated );
+               $changed = $changed || ($updated && $this->mTitle->areRestrictionsCascading() != $cascade);
                $protect = ( $updated != '' );
 
                # If nothing's changed, do nothing
                if( $changed ) {
-                       global $wgGroupPermissions;
                        if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
 
                                $dbw = wfGetDB( DB_MASTER );
-
-                               $encodedExpiry = Block::encodeExpiry($expiry, $dbw );
-
-                               $expiry_description = '';
-                               if ( $encodedExpiry != 'infinity' ) {
-                                       $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ) ).')';
-                               }
-
+                               
                                # Prepare a null revision to be added to the history
                                $modified = $current != '' && $protect;
-                               if ( $protect ) {
+                               if( $protect ) {
                                        $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
                                } else {
                                        $comment_type = 'unprotectedarticle';
                                }
                                $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
 
-                               foreach( $limit as $action => $restrictions ) {
-                                       # Check if the group level required to edit also can protect pages
-                                       # Otherwise, people who cannot normally protect can "protect" pages via transclusion
-                                       $cascade = ( $cascade && isset($wgGroupPermissions[$restrictions]['protect']) && $wgGroupPermissions[$restrictions]['protect'] );       
-                               }
-                               
-                               $cascade_description = '';
-                               if ($cascade) {
-                                       $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
+                               # Only restrictions with the 'protect' right can cascade...
+                               # Otherwise, people who cannot normally protect can "protect" pages via transclusion
+                               $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' );
+                               # The schema allows multiple restrictions
+                               if(!in_array('protect', $editrestriction) && !in_array('sysop', $editrestriction))
+                                       $cascade = false;
+                               $cascade_description = '';       
+                               if( $cascade ) {
+                                       $cascade_description = ' ['.wfMsgForContent('protect-summary-cascade').']';      
                                }
 
                                if( $reason )
                                        $comment .= ": $reason";
-                               if( $protect )
-                                       $comment .= " [$updated]";
-                               if ( $expiry_description && $protect )
-                                       $comment .= "$expiry_description";
-                               if ( $cascade )
-                                       $comment .= "$cascade_description";
-
-                               $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
-                               $nullRevId = $nullRevision->insertOn( $dbw );
 
+                               $editComment = $comment;
+                               $encodedExpiry = array();
+                               $protect_description = '';
+                               foreach( $limit as $action => $restrictions  ) {
+                                       $encodedExpiry[$action] = Block::encodeExpiry($expiry[$action], $dbw );
+                                       if( $restrictions != '' ) {
+                                               $protect_description .= "[$action=$restrictions] (";
+                                               if( $encodedExpiry[$action] != 'infinity' ) {
+                                                       $protect_description .= wfMsgForContent( 'protect-expiring', 
+                                                               $wgContLang->timeanddate( $expiry[$action], false, false ) ,
+                                                               $wgContLang->date( $expiry[$action], false, false ) ,
+                                                               $wgContLang->time( $expiry[$action], false, false ) );   
+                                               } else {
+                                                       $protect_description .= wfMsgForContent( 'protect-expiry-indefinite' );
+                                               }
+                                               $protect_description .= ') ';
+                                       }
+                               }
+                               $protect_description = trim($protect_description);
+                                       
+                               if( $protect_description && $protect )
+                                       $editComment .= " ($protect_description)";
+                               if( $cascade )
+                                       $editComment .= "$cascade_description";
                                # Update restrictions table
                                foreach( $limit as $action => $restrictions ) {
-                                       if ($restrictions != '' ) {
+                                       if($restrictions != '' ) {
                                                $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
-                                                       array( 'pr_page' => $id, 'pr_type' => $action
-                                                               , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0
-                                                               , 'pr_expiry' => $encodedExpiry ), __METHOD__  );
+                                                       array( 'pr_page' => $id, 
+                                                               'pr_type' => $action, 
+                                                               'pr_level' => $restrictions, 
+                                                               'pr_cascade' => ($cascade && $action == 'edit') ? 1 : 0,
+                                                               'pr_expiry' => $encodedExpiry[$action] ), __METHOD__  );
                                        } else {
                                                $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
                                                        'pr_type' => $action ), __METHOD__ );
                                        }
                                }
 
+                               # Insert a null revision
+                               $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
+                               $nullRevId = $nullRevision->insertOn( $dbw );
+
+                               $latest = $this->getLatest();
                                # Update page record
                                $dbw->update( 'page',
                                        array( /* SET */
@@ -1784,13 +1988,15 @@ class Article {
                                                'page_id' => $id
                                        ), 'Article::protect'
                                );
+
+                               wfRunHooks( 'NewRevisionFromEditComplete', array($this, $nullRevision, $latest, $wgUser) );
                                wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
 
                                # Update the protection log
                                $log = new LogPage( 'protect' );
-
                                if( $protect ) {
-                                       $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
+                                       $params = array($protect_description,$cascade ? 'cascade' : '');
+                                       $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason), $params );
                                } else {
                                        $log->addEntry( 'unprotect', $this->mTitle, $reason );
                                }
@@ -1804,11 +2010,10 @@ class Article {
        /**
         * Take an array of page restrictions and flatten it to a string
         * suitable for insertion into the page_restrictions field.
-        * @param array $limit
-        * @return string
-        * @private
+        * @param $limit Array
+        * @return String
         */
-       function flattenRestrictions( $limit ) {
+       protected static function flattenRestrictions( $limit ) {
                if( !is_array( $limit ) ) {
                        throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
                }
@@ -1822,46 +2027,150 @@ class Article {
                return implode( ':', $bits );
        }
 
+       /**
+        * Auto-generates a deletion reason
+        * @param &$hasHistory Boolean: whether the page has a history
+        */
+       public function generateReason( &$hasHistory ) {
+               global $wgContLang;
+               $dbw = wfGetDB( DB_MASTER );
+               // Get the last revision
+               $rev = Revision::newFromTitle( $this->mTitle );
+               if( is_null( $rev ) )
+                       return false;
+
+               // Get the article's contents
+               $contents = $rev->getText();
+               $blank = false;
+               // If the page is blank, use the text from the previous revision,
+               // which can only be blank if there's a move/import/protect dummy revision involved
+               if( $contents == '' ) {
+                       $prev = $rev->getPrevious();
+                       if( $prev )     {
+                               $contents = $prev->getText();
+                               $blank = true;
+                       }
+               }
+
+               // Find out if there was only one contributor
+               // Only scan the last 20 revisions
+               $limit = 20;
+               $res = $dbw->select( 'revision', 'rev_user_text',
+                       array( 'rev_page' => $this->getID() ), __METHOD__,
+                       array( 'LIMIT' => $limit )
+               );
+               if( $res === false )
+                       // This page has no revisions, which is very weird
+                       return false;
+               if( $res->numRows() > 1 )
+                               $hasHistory = true;
+               else
+                               $hasHistory = false;
+               $row = $dbw->fetchObject( $res );
+               $onlyAuthor = $row->rev_user_text;
+               // Try to find a second contributor
+               foreach( $res as $row ) {
+                       if( $row->rev_user_text != $onlyAuthor ) {
+                               $onlyAuthor = false;
+                               break;
+                       }
+               }
+               $dbw->freeResult( $res );
+
+               // Generate the summary with a '$1' placeholder
+               if( $blank ) {
+                       // The current revision is blank and the one before is also
+                       // blank. It's just not our lucky day
+                       $reason = wfMsgForContent( 'exbeforeblank', '$1' );
+               } else {
+                       if( $onlyAuthor )
+                               $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
+                       else
+                               $reason = wfMsgForContent( 'excontent', '$1' );
+               }
+               
+               if( $reason == '-' ) {
+                       // Allow these UI messages to be blanked out cleanly
+                       return '';
+               }
+
+               // Replace newlines with spaces to prevent uglyness
+               $contents = preg_replace( "/[\n\r]/", ' ', $contents );
+               // Calculate the maximum amount of chars to get
+               // Max content length = max comment length - length of the comment (excl. $1) - '...'
+               $maxLength = 255 - (strlen( $reason ) - 2) - 3;
+               $contents = $wgContLang->truncate( $contents, $maxLength, '...' );
+               // Remove possible unfinished links
+               $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
+               // Now replace the '$1' placeholder
+               $reason = str_replace( '$1', $contents, $reason );
+               return $reason;
+       }
+
+
        /*
         * UI entry point for page deletion
         */
-       function delete() {
+       public function delete() {
                global $wgUser, $wgOut, $wgRequest;
+
                $confirm = $wgRequest->wasPosted() &&
-                       $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
-               $reason = $wgRequest->getText( 'wpReason' );
+                               $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
 
-               # This code desperately needs to be totally rewritten
+               $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
+               $this->DeleteReason = $wgRequest->getText( 'wpReason' );
 
-               # Check permissions
-               if( $wgUser->isAllowed( 'delete' ) ) {
-                       if( $wgUser->isBlocked( !$confirm ) ) {
-                               $wgOut->blockedPage();
-                               return;
-                       }
-               } else {
-                       $wgOut->permissionRequired( 'delete' );
-                       return;
+               $reason = $this->DeleteReasonList;
+
+               if( $reason != 'other' && $this->DeleteReason != '' ) {
+                       // Entry from drop down menu + additional comment
+                       $reason .= ': ' . $this->DeleteReason;
+               } elseif( $reason == 'other' ) {
+                       $reason = $this->DeleteReason;
                }
+               # Flag to hide all contents of the archived revisions
+               $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
+
+               # This code desperately needs to be totally rewritten
 
+               # Read-only check...
                if( wfReadOnly() ) {
                        $wgOut->readOnlyPage();
                        return;
                }
 
-               $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
+               # Check permissions
+               $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
+
+               if( count( $permission_errors ) > 0 ) {
+                       $wgOut->showPermissionsErrorPage( $permission_errors );
+                       return;
+               }
+
+               $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->mTitle->getPrefixedText() ) );
 
                # Better double-check that it hasn't been deleted yet!
                $dbw = wfGetDB( DB_MASTER );
                $conds = $this->mTitle->pageCond();
                $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
-               if ( $latest === false ) {
-                       $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
+               if( $latest === false ) {
+                       $wgOut->showFatalError( wfMsgExt( 'cannotdelete', array( 'parse' ) ) );
+                       $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
+                       LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTitle->getPrefixedText() );
+                       return;
+               }
+
+               # Hack for big sites
+               $bigHistory = $this->isBigDeletion();
+               if( $bigHistory && !$this->mTitle->userCan( 'bigdelete' ) ) {
+                       global $wgLang, $wgDeleteRevisionsLimit;
+                       $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n",
+                               array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
                        return;
                }
 
                if( $confirm ) {
-                       $this->doDelete( $reason );
+                       $this->doDelete( $reason, $suppress );
                        if( $wgRequest->getCheck( 'wpWatch' ) ) {
                                $this->doWatch();
                        } elseif( $this->mTitle->userIsWatching() ) {
@@ -1870,87 +2179,56 @@ class Article {
                        return;
                }
 
-               # determine whether this page has earlier revisions
-               # and insert a warning if it does
-               $maxRevisions = 20;
-               $authors = $this->getLastNAuthors( $maxRevisions, $latest );
+               // Generate deletion reason
+               $hasHistory = false;
+               if( !$reason ) $reason = $this->generateReason($hasHistory);
 
-               if( count( $authors ) > 1 && !$confirm ) {
-                       $skin=$wgUser->getSkin();
-                       $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
-               }
-
-               # If a single user is responsible for all revisions, find out who they are
-               if ( count( $authors ) == $maxRevisions ) {
-                       // Query bailed out, too many revisions to find out if they're all the same
-                       $authorOfAll = false;
-               } else {
-                       $authorOfAll = reset( $authors );
-                       foreach ( $authors as $author ) {
-                               if ( $authorOfAll != $author ) {
-                                       $authorOfAll = false;
-                                       break;
-                               }
+               // If the page has a history, insert a warning
+               if( $hasHistory && !$confirm ) {
+                       $skin = $wgUser->getSkin();
+                       $wgOut->addHTML( '<strong>' . wfMsgExt( 'historywarning', array( 'parseinline' ) ) . ' ' . $skin->historyLink() . '</strong>' );
+                       if( $bigHistory ) {
+                               global $wgLang, $wgDeleteRevisionsLimit;
+                               $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n",
+                                       array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
                        }
                }
-               # Fetch article text
-               $rev = Revision::newFromTitle( $this->mTitle );
-
-               if( !is_null( $rev ) ) {
-                       # if this is a mini-text, we can paste part of it into the deletion reason
-                       $text = $rev->getText();
-
-                       #if this is empty, an earlier revision may contain "useful" text
-                       $blanked = false;
-                       if( $text == '' ) {
-                               $prev = $rev->getPrevious();
-                               if( $prev ) {
-                                       $text = $prev->getText();
-                                       $blanked = true;
-                               }
-                       }
-
-                       $length = strlen( $text );
 
-                       # this should not happen, since it is not possible to store an empty, new
-                       # page. Let's insert a standard text in case it does, though
-                       if( $length == 0 && $reason === '' ) {
-                               $reason = wfMsgForContent( 'exblank' );
-                       }
-
-                       if( $reason === '' ) {
-                               # comment field=255, let's grep the first 150 to have some user
-                               # space left
-                               global $wgContLang;
-                               $text = $wgContLang->truncate( $text, 150, '...' );
-
-                               # let's strip out newlines
-                               $text = preg_replace( "/[\n\r]/", '', $text );
+               return $this->confirmDelete( $reason );
+       }
 
-                               if( !$blanked ) {
-                                       if( $authorOfAll === false ) {
-                                               $reason = wfMsgForContent( 'excontent', $text );
-                                       } else {
-                                               $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
-                                       }
-                               } else {
-                                       $reason = wfMsgForContent( 'exbeforeblank', $text );
-                               }
-                       }
+       /**
+        * @return bool whether or not the page surpasses $wgDeleteRevisionsLimit revisions
+        */
+       public function isBigDeletion() {
+               global $wgDeleteRevisionsLimit;
+               if( $wgDeleteRevisionsLimit ) {
+                       $revCount = $this->estimateRevisionCount();
+                       return $revCount > $wgDeleteRevisionsLimit;
                }
+               return false;
+       }
 
-               return $this->confirmDelete( '', $reason );
+       /**
+        * @return int approximate revision count
+        */
+       public function estimateRevisionCount() {
+               $dbr = wfGetDB( DB_SLAVE );
+               // For an exact count...
+               //return $dbr->selectField( 'revision', 'COUNT(*)',
+               //      array( 'rev_page' => $this->getId() ), __METHOD__ );
+               return $dbr->estimateRowCount( 'revision', '*',
+                       array( 'rev_page' => $this->getId() ), __METHOD__ );
        }
 
        /**
         * Get the last N authors
-        * @param int $num Number of revisions to get
-        * @param string $revLatest The latest rev_id, selected from the master (optional)
+        * @param $num Integer: number of revisions to get
+        * @param $revLatest String: the latest rev_id, selected from the master (optional)
         * @return array Array of authors, duplicates not removed
         */
-       function getLastNAuthors( $num, $revLatest = 0 ) {
+       public function getLastNAuthors( $num, $revLatest = 0 ) {
                wfProfileIn( __METHOD__ );
-
                // First try the slave
                // If that doesn't have the latest revision, try the master
                $continue = 2;
@@ -1967,12 +2245,12 @@ class Article {
                                        'LIMIT' => $num
                                ) )
                        );
-                       if ( !$res ) {
+                       if( !$res ) {
                                wfProfileOut( __METHOD__ );
                                return array();
                        }
                        $row = $db->fetchObject( $res );
-                       if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
+                       if( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
                                $db = wfGetDB( DB_MASTER );
                                $continue--;
                        } else {
@@ -1990,91 +2268,112 @@ class Article {
 
        /**
         * Output deletion confirmation dialog
+        * @param $reason String: prefilled reason
         */
-       function confirmDelete( $par, $reason ) {
+       public function confirmDelete( $reason ) {
                global $wgOut, $wgUser;
 
                wfDebug( "Article::confirmDelete\n" );
 
-               $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
-               $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
-               $wgOut->setRobotpolicy( 'noindex,nofollow' );
-               $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
-
-               $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
-
-               $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
-               $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
-               $token = htmlspecialchars( $wgUser->editToken() );
-               $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
-
-               $wgOut->addHTML( "
-<form id='deleteconfirm' method='post' action=\"{$formaction}\">
-       <table border='0'>
-               <tr>
-                       <td align='right'>
-                               <label for='wpReason'>{$delcom}:</label>
-                       </td>
-                       <td align='left'>
-                               <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
-                       </td>
-               </tr>
-               <tr>
-                       <td>&nbsp;</td>
-                       <td>$watch</td>
-               </tr>
-               <tr>
-                       <td>&nbsp;</td>
-                       <td>
-                               <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
-                       </td>
-               </tr>
-       </table>
-       <input type='hidden' name='wpEditToken' value=\"{$token}\" />
-</form>\n" );
-
-               $wgOut->returnToMain( false );
-
-               $this->showLogExtract( $wgOut );
-       }
-
+               $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->mTitle ) ) );
+               $wgOut->setRobotPolicy( 'noindex,nofollow' );
+               $wgOut->addWikiMsg( 'confirmdeletetext' );
+
+               if( $wgUser->isAllowed( 'suppressrevision' ) ) {
+                       $suppress = "<tr id=\"wpDeleteSuppressRow\" name=\"wpDeleteSuppressRow\">
+                                       <td></td>
+                                       <td class='mw-input'>" .
+                                               Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
+                                                       'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
+                                       "</td>
+                               </tr>";
+               } else {
+                       $suppress = '';
+               }
+               $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching();
+
+               $form = Xml::openElement( 'form', array( 'method' => 'post', 
+                       'action' => $this->mTitle->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
+                       Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
+                       Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
+                       Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
+                       "<tr id=\"wpDeleteReasonListRow\">
+                               <td class='mw-label'>" .
+                                       Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
+                               "</td>
+                               <td class='mw-input'>" .
+                                       Xml::listDropDown( 'wpDeleteReasonList',
+                                               wfMsgForContent( 'deletereason-dropdown' ),
+                                               wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
+                               "</td>
+                       </tr>
+                       <tr id=\"wpDeleteReasonRow\">
+                               <td class='mw-label'>" .
+                                       Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
+                               "</td>
+                               <td class='mw-input'>" .
+                                       Xml::input( 'wpReason', 60, $reason, array( 'type' => 'text', 'maxlength' => '255', 
+                                               'tabindex' => '2', 'id' => 'wpReason' ) ) .
+                               "</td>
+                       </tr>
+                       <tr>
+                               <td></td>
+                               <td class='mw-input'>" .
+                                       Xml::checkLabel( wfMsg( 'watchthis' ),
+                                               'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
+                               "</td>
+                       </tr>
+                       $suppress
+                       <tr>
+                               <td></td>
+                               <td class='mw-submit'>" .
+                                       Xml::submitButton( wfMsg( 'deletepage' ),
+                                               array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
+                               "</td>
+                       </tr>" .
+                       Xml::closeElement( 'table' ) .
+                       Xml::closeElement( 'fieldset' ) .
+                       Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
+                       Xml::closeElement( 'form' );
+
+                       if( $wgUser->isAllowed( 'editinterface' ) ) {
+                               $skin = $wgUser->getSkin();
+                               $link = $skin->makeLink ( 'MediaWiki:Deletereason-dropdown', wfMsgHtml( 'delete-edit-reasonlist' ) );
+                               $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
+                       }
 
-       /**
-        * Show relevant lines from the deletion log
-        */
-       function showLogExtract( $out ) {
-               $out->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . '</h2>' );
-               $logViewer = new LogViewer(
-                       new LogReader(
-                               new FauxRequest(
-                                       array( 'page' => $this->mTitle->getPrefixedText(),
-                                              'type' => 'delete' ) ) ) );
-               $logViewer->showList( $out );
+               $wgOut->addHTML( $form );
+               LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTitle->getPrefixedText() );
        }
 
-
        /**
         * Perform a deletion and output success or failure messages
         */
-       function doDelete( $reason ) {
+       public function doDelete( $reason, $suppress = false ) {
                global $wgOut, $wgUser;
-               wfDebug( __METHOD__."\n" );
+               $id = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 
-               if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
-                       if ( $this->doDeleteArticle( $reason ) ) {
-                               $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
+               $error = '';
+               if( wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason, &$error)) ) {
+                       if( $this->doDeleteArticle( $reason, $suppress, $id ) ) {
+                               $deleted = $this->mTitle->getPrefixedText();
 
                                $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
-                               $wgOut->setRobotpolicy( 'noindex,nofollow' );
+                               $wgOut->setRobotPolicy( 'noindex,nofollow' );
 
-                               $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
-                               $text = wfMsg( 'deletedtext', $deleted, $loglink );
+                               $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
 
-                               $wgOut->addWikiText( $text );
+                               $wgOut->addWikiMsg( 'deletedtext', $deleted, $loglink );
                                $wgOut->returnToMain( false );
-                               wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
+                               wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason, $id));
                        } else {
-                               $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
+                               if( $error == '' ) {
+                                       $wgOut->showFatalError( wfMsgExt( 'cannotdelete', array( 'parse' ) ) );
+                                       $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
+                                       LogEventsList::showLogExtract( $wgOut, 'delete', $this->mTitle->getPrefixedText() );
+                               } else {
+                                       $wgOut->showFatalError( $error );
+                               }
                        }
                }
        }
@@ -2084,7 +2383,7 @@ class Article {
         * Deletes the article with database consistency, writes logs, purges caches
         * Returns success
         */
-       function doDeleteArticle( $reason ) {
+       public function doDeleteArticle( $reason, $suppress = false, $id = 0 ) {
                global $wgUseSquid, $wgDeferredUpdateList;
                global $wgUseTrackbacks;
 
@@ -2093,15 +2392,28 @@ class Article {
                $dbw = wfGetDB( DB_MASTER );
                $ns = $this->mTitle->getNamespace();
                $t = $this->mTitle->getDBkey();
-               $id = $this->mTitle->getArticleID();
+               $id = $id ? $id : $this->mTitle->getArticleID( GAID_FOR_UPDATE );
 
-               if ( $t == '' || $id == 0 ) {
+               if( $t == '' || $id == 0 ) {
                        return false;
                }
 
                $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
                array_push( $wgDeferredUpdateList, $u );
 
+               // Bitfields to further suppress the content
+               if( $suppress ) {
+                       $bitfield = 0;
+                       // This should be 15...
+                       $bitfield |= Revision::DELETED_TEXT;
+                       $bitfield |= Revision::DELETED_COMMENT;
+                       $bitfield |= Revision::DELETED_USER;
+                       $bitfield |= Revision::DELETED_RESTRICTED;
+               } else {
+                       $bitfield = 'rev_deleted';
+               }
+
+               $dbw->begin();
                // For now, shunt the revision data into the archive table.
                // Text is *not* removed from the text table; bulk storage
                // is left intact to avoid breaking block-compression or
@@ -2125,8 +2437,9 @@ class Article {
                                'ar_text_id'    => 'rev_text_id',
                                'ar_text'       => '\'\'', // Be explicit to appease
                                'ar_flags'      => '\'\'', // MySQL's "strict mode"...
-                               'ar_len'                => 'rev_len',
+                               'ar_len'        => 'rev_len',
                                'ar_page_id'    => 'page_id',
+                               'ar_deleted'    => $bitfield
                        ), array(
                                'page_id' => $id,
                                'page_id = rev_page'
@@ -2138,13 +2451,25 @@ class Article {
 
                # Now that it's safely backed up, delete it
                $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
+               $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
+               if( !$ok ) {
+                       $dbw->rollback();
+                       return false;
+               }
+               
+               # Fix category table counts
+               $cats = array();
+               $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
+               foreach( $res as $row ) {
+                       $cats []= $row->cl_to;
+               }
+               $this->updateCategoryCounts( array(), $cats );
 
                # If using cascading deletes, we can skip some explicit deletes
-               if ( !$dbw->cascadingDeletes() ) {
-
+               if( !$dbw->cascadingDeletes() ) {
                        $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
 
-                       if ($wgUseTrackbacks)
+                       if($wgUseTrackbacks)
                                $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
 
                        # Delete outgoing links
@@ -2158,103 +2483,144 @@ class Article {
                }
 
                # If using cleanup triggers, we can skip some manual deletes
-               if ( !$dbw->cleanupTriggers() ) {
-
+               if( !$dbw->cleanupTriggers() ) {
                        # Clean up recentchanges entries...
-                       $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
+                       $dbw->delete( 'recentchanges',
+                               array( 'rc_type != '.RC_LOG, 
+                                       'rc_namespace' => $this->mTitle->getNamespace(),
+                                       'rc_title' => $this->mTitle->getDBKey() ),
+                               __METHOD__ );
+                       $dbw->delete( 'recentchanges',
+                               array( 'rc_type != '.RC_LOG, 'rc_cur_id' => $id ),
+                               __METHOD__ );
                }
 
                # Clear caches
                Article::onArticleDelete( $this->mTitle );
 
-               # Log the deletion
-               $log = new LogPage( 'delete' );
-               $log->addEntry( 'delete', $this->mTitle, $reason );
-
                # Clear the cached article id so the interface doesn't act like we exist
                $this->mTitle->resetArticleID( 0 );
                $this->mTitle->mArticleID = 0;
+
+               # Log the deletion, if the page was suppressed, log it at Oversight instead
+               $logtype = $suppress ? 'suppress' : 'delete';
+               $log = new LogPage( $logtype );
+
+               # Make sure logging got through
+               $log->addEntry( 'delete', $this->mTitle, $reason, array() );
+
+               $dbw->commit();
+
                return true;
        }
 
        /**
         * Roll back the most recent consecutive set of edits to a page
         * from the same user; fails if there are no eligible edits to
-        * roll back to, e.g. user is the sole contributor
+        * roll back to, e.g. user is the sole contributor. This function
+        * performs permissions checks on $wgUser, then calls commitRollback()
+        * to do the dirty work
+        *
+        * @param $fromP String: Name of the user whose edits to rollback.
+        * @param $summary String: Custom summary. Set to default summary if empty.
+        * @param $token String: Rollback token.
+        * @param $bot Boolean: If true, mark all reverted edits as bot.
+        *
+        * @param $resultDetails Array: contains result-specific array of additional values
+        *    'alreadyrolled' : 'current' (rev)
+        *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
         *
-        * @param string $fromP - Name of the user whose edits to rollback. 
-        * @param string $summary - Custom summary. Set to default summary if empty.
-        * @param string $token - Rollback token.
-        * @param bool $bot - If true, mark all reverted edits as bot.
-        * 
-        * @param array $resultDetails contains result-specific dict of additional values
-        *    ALREADY_ROLLED : 'current' (rev)
-        *    SUCCESS        : 'summary' (str), 'current' (rev), 'target' (rev)
-        * 
-        * @return self::SUCCESS on succes, self::* on failure
+        * @return array of errors, each error formatted as
+        *   array(messagekey, param1, param2, ...).
+        * On success, the array is empty.  This array can also be passed to
+        * OutputPage::showPermissionsErrorPage().
         */
        public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
-               global $wgUser, $wgUseRCPatrol;
+               global $wgUser;
                $resultDetails = null;
-               
-               if( $wgUser->isAllowed( 'rollback' ) ) {
-                       if( $wgUser->isBlocked() ) {
-                               return self::BLOCKED;
-                       }
-               } else {
-                       return self::PERM_DENIED;
-               }
-                       
-               if ( wfReadOnly() ) {
-                       return self::READONLY;
-               }
+
+               # Check permissions
+               $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
+               $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $wgUser );
+               $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) );
+
                if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
-                       return self::BAD_TOKEN;
+                       $errors[] = array( 'sessionfailure' );
 
+               if( $wgUser->pingLimiter( 'rollback' ) || $wgUser->pingLimiter() ) {
+                       $errors[] = array( 'actionthrottledtext' );
+               }
+               # If there were errors, bail out now
+               if( !empty( $errors ) )
+                       return $errors;
+
+               return $this->commitRollback($fromP, $summary, $bot, $resultDetails);
+       }
+
+       /**
+        * Backend implementation of doRollback(), please refer there for parameter
+        * and return value documentation
+        *
+        * NOTE: This function does NOT check ANY permissions, it just commits the
+        * rollback to the DB Therefore, you should only call this function direct-
+        * ly if you want to use custom permissions checks. If you don't, use
+        * doRollback() instead.
+        */
+       public function commitRollback($fromP, $summary, $bot, &$resultDetails) {
+               global $wgUseRCPatrol, $wgUser, $wgLang;
                $dbw = wfGetDB( DB_MASTER );
 
+               if( wfReadOnly() ) {
+                       return array( array( 'readonlytext' ) );
+               }
+
                # Get the last editor
                $current = Revision::newFromTitle( $this->mTitle );
                if( is_null( $current ) ) {
                        # Something wrong... no page?
-                       return self::BAD_TITLE;
+                       return array(array('notanarticle'));
                }
 
                $from = str_replace( '_', ' ', $fromP );
                if( $from != $current->getUserText() ) {
                        $resultDetails = array( 'current' => $current );
-                       return self::ALREADY_ROLLED;
+                       return array(array('alreadyrolled',
+                               htmlspecialchars($this->mTitle->getPrefixedText()),
+                               htmlspecialchars($fromP),
+                               htmlspecialchars($current->getUserText())
+                       ));
                }
 
                # Get the last edit not by this guy
                $user = intval( $current->getUser() );
                $user_text = $dbw->addQuotes( $current->getUserText() );
                $s = $dbw->selectRow( 'revision',
-                       array( 'rev_id', 'rev_timestamp' ),
-                       array(
-                               'rev_page' => $current->getPage(),
-                               "rev_user <> {$user} OR rev_user_text <> {$user_text}"
+                       array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
+                       array(  'rev_page' => $current->getPage(),
+                               "rev_user != {$user} OR rev_user_text != {$user_text}"
                        ), __METHOD__,
-                       array(
-                               'USE INDEX' => 'page_timestamp',
+                       array(  'USE INDEX' => 'page_timestamp',
                                'ORDER BY'  => 'rev_timestamp DESC' )
                        );
                if( $s === false ) {
-                       # Something wrong
-                       return self::ONLY_AUTHOR;
+                       # No one else ever edited this page
+                       return array(array('cantrollback'));
+               } else if( $s->rev_deleted & REVISION::DELETED_TEXT || $s->rev_deleted & REVISION::DELETED_USER ) {
+                       # Only admins can see this text
+                       return array(array('notvisiblerev'));
                }
-       
+
                $set = array();
-               if ( $bot ) {
+               if( $bot && $wgUser->isAllowed('markbotedits') ) {
                        # Mark all reverted edits as bot
                        $set['rc_bot'] = 1;
                }
-               if ( $wgUseRCPatrol ) {
+               if( $wgUseRCPatrol ) {
                        # Mark all reverted edits as patrolled
                        $set['rc_patrolled'] = 1;
                }
 
-               if ( $set ) {
+               if( $set ) {
                        $dbw->update( 'recentchanges', $set,
                                        array( /* WHERE */
                                                'rc_cur_id' => $current->getPage(),
@@ -2264,32 +2630,54 @@ class Article {
                                );
                }
 
-               # Get the edit summary
+               # Generate the edit summary if necessary
                $target = Revision::newFromId( $s->rev_id );
-               if( empty( $summary ) )
-                       $summary = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
+               if( empty( $summary ) ){
+                       $summary = wfMsgForContent( 'revertpage' );
+               }
+
+               # Allow the custom summary to use the same args as the default message
+               $args = array(
+                       $target->getUserText(), $from, $s->rev_id,
+                       $wgLang->timeanddate(wfTimestamp(TS_MW, $s->rev_timestamp), true),
+                       $current->getId(), $wgLang->timeanddate($current->getTimestamp())
+               );
+               $summary = wfMsgReplaceArgs( $summary, $args );
 
                # Save
-               $flags = EDIT_UPDATE | EDIT_MINOR;
-               if( $bot )
+               $flags = EDIT_UPDATE;
+
+               if( $wgUser->isAllowed('minoredit') )
+                       $flags |= EDIT_MINOR;
+
+               if( $bot && ($wgUser->isAllowed('markbotedits') || $wgUser->isAllowed('bot')) )
                        $flags |= EDIT_FORCE_BOT;
-               $this->doEdit( $target->getText(), $summary, $flags );
+               # Actually store the edit
+               $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() );
+               if( !empty( $status->value['revision'] ) ) {
+                       $revId = $status->value['revision']->getId();
+               } else {
+                       $revId = false;
+               }
+
+               wfRunHooks( 'ArticleRollbackComplete', array( $this, $wgUser, $target, $current ) );
 
                $resultDetails = array(
                        'summary' => $summary,
                        'current' => $current,
                        'target' => $target,
+                       'newid' => $revId
                );
-               return self::SUCCESS;
+               return array();
        }
 
        /**
         * User interface for rollback operations
         */
-       function rollback() {
+       public function rollback() {
                global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
-
                $details = null;
+
                $result = $this->doRollback(
                        $wgRequest->getVal( 'from' ),
                        $wgRequest->getText( 'summary' ),
@@ -2298,85 +2686,105 @@ class Article {
                        $details
                );
 
-               switch( $result ) {
-                       case self::BLOCKED:
-                               $wgOut->blockedPage();
-                               break;
-                       case self::PERM_DENIED:
-                               $wgOut->permissionRequired( 'rollback' );
-                               break;
-                       case self::READONLY:
-                               $wgOut->readOnlyPage( $this->getContent() );
-                               break;
-                       case self::BAD_TOKEN:
-                               $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
-                               $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
-                               break;
-                       case self::BAD_TITLE:
-                               $wgOut->addHtml( wfMsg( 'notanarticle' ) );
-                               break;
-                       case self::ALREADY_ROLLED:
+               if( in_array( array( 'actionthrottledtext' ), $result ) ) {
+                       $wgOut->rateLimited();
+                       return;
+               }
+               if( isset( $result[0][0] ) && ( $result[0][0] == 'alreadyrolled' || $result[0][0] == 'cantrollback' ) ) {
+                       $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
+                       $errArray = $result[0];
+                       $errMsg = array_shift( $errArray );
+                       $wgOut->addWikiMsgArray( $errMsg, $errArray );
+                       if( isset( $details['current'] ) ){
                                $current = $details['current'];
-                               $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
-                               $wgOut->addWikiText(
-                                       wfMsg( 'alreadyrolled',
-                                               htmlspecialchars( $this->mTitle->getPrefixedText() ),
-                                               htmlspecialchars( $wgRequest->getVal( 'from' ) ),
-                                               htmlspecialchars( $current->getUserText() )
-                                       )
-                               );
                                if( $current->getComment() != '' ) {
-                                       $wgOut->addHtml( wfMsg( 'editcomment',
-                                               $wgUser->getSkin()->formatComment( $current->getComment() ) ) );
+                                       $wgOut->addWikiMsgArray( 'editcomment', array( 
+                                               $wgUser->getSkin()->formatComment( $current->getComment() ) ), array( 'replaceafter' ) );
                                }
-                               break;
-                       case self::ONLY_AUTHOR:
-                               $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
-                               $wgOut->addHtml( wfMsg( 'cantrollback' ) );
-                               break;
-                       case self::SUCCESS:
-                               $current = $details['current'];
-                               $target = $details['target'];
-                               $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
-                               $wgOut->setRobotPolicy( 'noindex,nofollow' );
-                               $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
-                                       . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
-                               $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
-                                       . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
-                               $wgOut->addHtml( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
-                               $wgOut->returnToMain( false, $this->mTitle );
-                               break;
-                       default:
-                               throw new MWException( __METHOD__ . ": Unknown return value `{$result}`" );
+                       }
+                       return;
+               }
+               # Display permissions errors before read-only message -- there's no
+               # point in misleading the user into thinking the inability to rollback
+               # is only temporary.
+               if( !empty( $result ) && $result !== array( array( 'readonlytext' ) ) ) {
+                       # array_diff is completely broken for arrays of arrays, sigh.  Re-
+                       # move any 'readonlytext' error manually.
+                       $out = array();
+                       foreach( $result as $error ) {
+                               if( $error != array( 'readonlytext' ) ) {
+                                       $out []= $error;
+                               }
+                       }
+                       $wgOut->showPermissionsErrorPage( $out );
+                       return;
                }
+               if( $result == array( array( 'readonlytext' ) ) ) {
+                       $wgOut->readOnlyPage();
+                       return;
+               }
+
+               $current = $details['current'];
+               $target = $details['target'];
+               $newId = $details['newid'];
+               $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
+               $wgOut->setRobotPolicy( 'noindex,nofollow' );
+               $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
+                       . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
+               $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
+                       . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
+               $wgOut->addHTML( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
+               $wgOut->returnToMain( false, $this->mTitle );
 
+               if( !$wgRequest->getBool( 'hidediff', false ) && !$wgUser->getBoolOption( 'norollbackdiff', false ) ) {
+                       $de = new DifferenceEngine( $this->mTitle, $current->getId(), $newId, false, true );
+                       $de->showDiff( '', '' );
+               }
        }
 
 
        /**
         * Do standard deferred updates after page view
-        * @private
         */
-       function viewUpdates() {
-               global $wgDeferredUpdateList;
-
-               if ( 0 != $this->getID() ) {
-                       global $wgDisableCounters;
-                       if( !$wgDisableCounters ) {
-                               Article::incViewCount( $this->getID() );
-                               $u = new SiteStatsUpdate( 1, 0, 0 );
-                               array_push( $wgDeferredUpdateList, $u );
-                       }
+       public function viewUpdates() {
+               global $wgDeferredUpdateList, $wgDisableCounters, $wgUser;
+               # Don't update page view counters on views from bot users (bug 14044)
+               if( !$wgDisableCounters && !$wgUser->isAllowed('bot') && $this->getID() ) {
+                       Article::incViewCount( $this->getID() );
+                       $u = new SiteStatsUpdate( 1, 0, 0 );
+                       array_push( $wgDeferredUpdateList, $u );
                }
-
                # Update newtalk / watchlist notification status
-               global $wgUser;
                $wgUser->clearNotification( $this->mTitle );
        }
 
+       /**
+        * Prepare text which is about to be saved.
+        * Returns a stdclass with source, pst and output members
+        */
+       public function prepareTextForEdit( $text, $revid=null ) {
+               if( $this->mPreparedEdit && $this->mPreparedEdit->newText == $text && $this->mPreparedEdit->revid == $revid) {
+                       // Already prepared
+                       return $this->mPreparedEdit;
+               }
+               global $wgParser;
+               $edit = (object)array();
+               $edit->revid = $revid;
+               $edit->newText = $text;
+               $edit->pst = $this->preSaveTransform( $text );
+               $options = new ParserOptions;
+               $options->setTidy( true );
+               $options->enableLimitReport();
+               $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $options, true, true, $revid );
+               $edit->oldText = $this->getContent();
+               $this->mPreparedEdit = $edit;
+               return $edit;
+       }
+
        /**
         * Do standard deferred updates after page edit.
         * Update links tables, site stats, search index and message cache.
+        * Purges pages that include this page if the text was changed here.
         * Every 100th edit, prune the recent changes table.
         *
         * @private
@@ -2387,26 +2795,36 @@ class Article {
         * @param $newid rev_id value of the new revision
         * @param $changed Whether or not the content actually changed
         */
-       function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
-               global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
+       public function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
+               global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser, $wgEnableParserCache;
 
                wfProfileIn( __METHOD__ );
 
                # Parse the text
-               $options = new ParserOptions;
-               $options->setTidy(true);
-               $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
+               # Be careful not to double-PST: $text is usually already PST-ed once
+               if( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
+                       wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
+                       $editInfo = $this->prepareTextForEdit( $text, $newid );
+               } else {
+                       wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
+                       $editInfo = $this->mPreparedEdit;
+               }
 
                # Save it to the parser cache
-               $parserCache =& ParserCache::singleton();
-               $parserCache->save( $poutput, $this, $wgUser );
+               if( $wgEnableParserCache ) {
+                       $parserCache = ParserCache::singleton();
+                       $parserCache->save( $editInfo->output, $this, $wgUser );
+               }
 
                # Update the links tables
-               $u = new LinksUpdate( $this->mTitle, $poutput );
+               $u = new LinksUpdate( $this->mTitle, $editInfo->output, false );
+               $u->setRecursiveTouch( $changed ); // refresh/invalidate including pages too
                $u->doUpdate();
+               
+               wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $changed ) );
 
                if( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
-                       if ( 0 == mt_rand( 0, 99 ) ) {
+                       if( 0 == mt_rand( 0, 99 ) ) {
                                // Flush old entries from the `recentchanges` table; we do this on
                                // random requests so as to avoid an increase in writes for no good reason
                                global $wgRCMaxAge;
@@ -2422,7 +2840,7 @@ class Article {
                $title = $this->mTitle->getPrefixedDBkey();
                $shortTitle = $this->mTitle->getDBkey();
 
-               if ( 0 == $id ) {
+               if( 0 == $id ) {
                        wfProfileOut( __METHOD__ );
                        return;
                }
@@ -2437,21 +2855,23 @@ class Article {
                # load of user talk pages and piss people off, nor if it's a minor edit
                # by a properly-flagged bot.
                if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
-                       && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
-                       if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
-                               $other = User::newFromName( $shortTitle );
-                               if( is_null( $other ) && User::isIP( $shortTitle ) ) {
+                       && !( $minoredit && $wgUser->isAllowed( 'nominornewtalk' ) ) ) {
+                       if( wfRunHooks('ArticleEditUpdateNewTalk', array( &$this ) ) ) {
+                               $other = User::newFromName( $shortTitle, false );
+                               if( !$other ) {
+                                       wfDebug( __METHOD__.": invalid username\n" );
+                               } elseif( User::isIP( $shortTitle ) ) {
                                        // An anonymous user
-                                       $other = new User();
-                                       $other->setName( $shortTitle );
-                               }
-                               if( $other ) {
                                        $other->setNewtalk( true );
+                               } elseif( $other->isLoggedIn() ) {
+                                       $other->setNewtalk( true );
+                               } else {
+                                       wfDebug( __METHOD__. ": don't need to notify a nonexistent user\n" );
                                }
                        }
                }
 
-               if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
+               if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
                        $wgMessageCache->replace( $shortTitle, $text );
                }
 
@@ -2461,13 +2881,13 @@ class Article {
        /**
         * Perform article updates on a special page creation.
         *
-        * @param Revision $rev
+        * @param $rev Revision object
         *
         * @todo This is a shitty interface function. Kill it and replace the
         * other shitty functions like editUpdates and such so it's not needed
         * anymore.
         */
-       function createUpdates( $rev ) {
+       public function createUpdates( $rev ) {
                $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
                $this->mTotalAdjustment = 1;
                $this->editUpdates( $rev->getText(), $rev->getComment(),
@@ -2480,14 +2900,13 @@ class Article {
         *   Revision as of \<date\>; view current revision
         *   \<- Previous version | Next Version -\>
         *
-        * @private
-        * @param string $oldid         Revision ID of this article revision
+        * @param $oldid String: revision ID of this article revision
         */
-       function setOldSubtitle( $oldid=0 ) {
+       public function setOldSubtitle( $oldid = 0 ) {
                global $wgLang, $wgOut, $wgUser;
 
-               if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
-                               return;
+               if( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
+                       return;
                }
 
                $revision = Revision::newFromId( $oldid );
@@ -2496,35 +2915,58 @@ class Article {
                $td = $wgLang->timeanddate( $this->mTimestamp, true );
                $sk = $wgUser->getSkin();
                $lnk = $current
-                       ? wfMsg( 'currentrevisionlink' )
-                       : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
+                       ? wfMsgHtml( 'currentrevisionlink' )
+                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'currentrevisionlink' ) );
                $curdiff = $current
-                       ? wfMsg( 'diff' )
-                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
+                       ? wfMsgHtml( 'diff' )
+                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'diff' ), 'diff=cur&oldid='.$oldid );
                $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
                $prevlink = $prev
-                       ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
-                       : wfMsg( 'previousrevision' );
+                       ? $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
+                       : wfMsgHtml( 'previousrevision' );
                $prevdiff = $prev
-                       ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
-                       : wfMsg( 'diff' );
+                       ? $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'diff' ), 'diff=prev&oldid='.$oldid )
+                       : wfMsgHtml( 'diff' );
                $nextlink = $current
-                       ? wfMsg( 'nextrevision' )
-                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
+                       ? wfMsgHtml( 'nextrevision' )
+                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'nextrevision' ), 'direction=next&oldid='.$oldid );
                $nextdiff = $current
-                       ? wfMsg( 'diff' )
-                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
-
-               $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
-                                               . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
+                       ? wfMsgHtml( 'diff' )
+                       : $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'diff' ), 'diff=next&oldid='.$oldid );
+
+               $cdel='';
+               if( $wgUser->isAllowed( 'deleterevision' ) ) {
+                       $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
+                       if( $revision->isCurrent() ) {
+                       // We don't handle top deleted edits too well
+                               $cdel = wfMsgHtml( 'rev-delundel' );
+                       } else if( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
+                       // If revision was hidden from sysops
+                               $cdel = wfMsgHtml( 'rev-delundel' );
+                       } else {
+                               $cdel = $sk->makeKnownLinkObj( $revdel,
+                                       wfMsgHtml('rev-delundel'),
+                                       'target=' . urlencode( $this->mTitle->getPrefixedDbkey() ) .
+                                       '&oldid=' . urlencode( $oldid ) );
+                               // Bolden oversighted content
+                               if( $revision->isDeleted( Revision::DELETED_RESTRICTED ) )
+                                       $cdel = "<strong>$cdel</strong>";
+                       }
+                       $cdel = "(<small>$cdel</small>) ";
+               }
+               # Show user links if allowed to see them. Normally they
+               # are hidden regardless, but since we can already see the text here...
+               $userlinks = $sk->revUserTools( $revision, false );
 
                $m = wfMsg( 'revision-info-current' );
                $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
                        ? 'revision-info-current'
                        : 'revision-info';
-                       
-               $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsg( $infomsg, $td, $userlinks ) . "</div>\n" .
-                    "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
+
+               $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsgExt( $infomsg, array( 'parseinline', 'replaceafter' ), $td, $userlinks, $revision->getID() ) . "</div>\n" .
+
+                    "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
+                       $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
                $wgOut->setSubtitle( $r );
        }
 
@@ -2532,9 +2974,9 @@ class Article {
         * This function is called right before saving the wikitext,
         * so we can do things like signatures and links-in-context.
         *
-        * @param string $text
+        * @param $text String
         */
-       function preSaveTransform( $text ) {
+       public function preSaveTransform( $text ) {
                global $wgParser, $wgUser;
                return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
        }
@@ -2546,17 +2988,16 @@ class Article {
         * output to the client that is necessary for this request.
         * (that is, it has sent a cached version of the page)
         */
-       function tryFileCache() {
+       protected function tryFileCache() {
                static $called = false;
                if( $called ) {
                        wfDebug( "Article::tryFileCache(): called twice!?\n" );
-                       return;
+                       return false;
                }
                $called = true;
-               if($this->isFileCacheable()) {
-                       $touched = $this->mTouched;
+               if( $this->isFileCacheable() ) {
                        $cache = new HTMLFileCache( $this->mTitle );
-                       if($cache->isFileCacheGood( $touched )) {
+                       if( $cache->isFileCacheGood( $this->mTouched ) ) {
                                wfDebug( "Article::tryFileCache(): about to load file\n" );
                                $cache->loadFromFileCache();
                                return true;
@@ -2567,46 +3008,22 @@ class Article {
                } else {
                        wfDebug( "Article::tryFileCache(): not cacheable\n" );
                }
+               return false;
        }
 
        /**
         * Check if the page can be cached
         * @return bool
         */
-       function isFileCacheable() {
-               global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
-               $action    = $wgRequest->getVal( 'action'    );
-               $oldid     = $wgRequest->getVal( 'oldid'     );
-               $diff      = $wgRequest->getVal( 'diff'      );
-               $redirect  = $wgRequest->getVal( 'redirect'  );
-               $printable = $wgRequest->getVal( 'printable' );
-               $page      = $wgRequest->getVal( 'page' );
-
-               //check for non-standard user language; this covers uselang, 
-               //and extensions for auto-detecting user language.
-               $ulang     = $wgLang->getCode(); 
-               $clang     = $wgContLang->getCode();
-
-               $cacheable = $wgUseFileCache
-                       && (!$wgShowIPinHeader)
-                       && ($this->getID() != 0)
-                       && ($wgUser->isAnon())
-                       && (!$wgUser->getNewtalk())
-                       && ($this->mTitle->getNamespace() != NS_SPECIAL )
-                       && (empty( $action ) || $action == 'view')
-                       && (!isset($oldid))
-                       && (!isset($diff))
-                       && (!isset($redirect))
-                       && (!isset($printable))
-                       && !isset($page)
-                       && (!$this->mRedirectedFrom)
-                       && ($ulang === $clang);
-
-               if ( $cacheable ) {
-                       //extension may have reason to disable file caching on some pages.
-                       $cacheable = wfRunHooks( 'IsFileCacheable', array( $this ) );
+       public function isFileCacheable() {
+               $cacheable = false;
+               if( HTMLFileCache::useFileCache() ) {
+                       $cacheable = $this->getID() && !$this->mRedirectedFrom;
+                       // Extension may have reason to disable file caching on some pages.
+                       if( $cacheable ) {
+                               $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
+                       }
                }
-
                return $cacheable;
        }
 
@@ -2614,7 +3031,7 @@ class Article {
         * Loads page_touched and returns a value indicating if it should be used
         *
         */
-       function checkTouched() {
+       public function checkTouched() {
                if( !$this->mDataLoaded ) {
                        $this->loadPageData();
                }
@@ -2624,7 +3041,7 @@ class Article {
        /**
         * Get the page_touched field
         */
-       function getTouched() {
+       public function getTouched() {
                # Ensure that page data has been loaded
                if( !$this->mDataLoaded ) {
                        $this->loadPageData();
@@ -2635,8 +3052,8 @@ class Article {
        /**
         * Get the page_latest field
         */
-       function getLatest() {
-               if ( !$this->mDataLoaded ) {
+       public function getLatest() {
+               if( !$this->mDataLoaded ) {
                        $this->loadPageData();
                }
                return $this->mLatest;
@@ -2647,15 +3064,14 @@ class Article {
         * The article must already exist; link tables etc
         * are not updated, caches are not flushed.
         *
-        * @param string $text text submitted
-        * @param string $comment comment submitted
-        * @param bool $minor whereas it's a minor modification
+        * @param $text String: text submitted
+        * @param $comment String: comment submitted
+        * @param $minor Boolean: whereas it's a minor modification
         */
-       function quickEdit( $text, $comment = '', $minor = 0 ) {
+       public function quickEdit( $text, $comment = '', $minor = 0 ) {
                wfProfileIn( __METHOD__ );
 
                $dbw = wfGetDB( DB_MASTER );
-               $dbw->begin();
                $revision = new Revision( array(
                        'page'       => $this->getId(),
                        'text'       => $text,
@@ -2664,7 +3080,8 @@ class Article {
                        ) );
                $revision->insertOn( $dbw );
                $this->updateRevisionOn( $dbw, $revision );
-               $dbw->commit();
+
+               wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, false, $wgUser) );
 
                wfProfileOut( __METHOD__ );
        }
@@ -2672,10 +3089,9 @@ class Article {
        /**
         * Used to increment the view counter
         *
-        * @static
-        * @param integer $id article id
+        * @param $id Integer: article id
         */
-       function incViewCount( $id ) {
+       public static function incViewCount( $id ) {
                $id = intval( $id );
                global $wgHitcounterUpdateFreq, $wgDBtype;
 
@@ -2708,14 +3124,14 @@ class Article {
                        wfProfileIn( 'Article::incViewCount-collect' );
                        $old_user_abort = ignore_user_abort( true );
 
-                       if ($wgDBtype == 'mysql')
+                       if($wgDBtype == 'mysql')
                                $dbw->query("LOCK TABLES $hitcounterTable WRITE");
                        $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
                        $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
                                "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
                                'GROUP BY hc_id');
                        $dbw->query("DELETE FROM $hitcounterTable");
-                       if ($wgDBtype == 'mysql') {
+                       if($wgDBtype == 'mysql') {
                                $dbw->query('UNLOCK TABLES');
                                $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
                                        'WHERE page_id = hc_id');
@@ -2740,13 +3156,13 @@ class Article {
         * This is a good place to put code to clear caches, for instance.
         *
         * This is called on page move and undelete, as well as edit
-        * @static
-        * @param $title_obj a title object
+        *
+        * @param $title a title object
         */
 
-       static function onArticleCreate($title) {
-               # The talk page isn't in the regular link tables, so we need to update manually:
-               if ( $title->isTalkPage() ) {
+       public static function onArticleCreate( $title ) {
+               # Update existence markers on article/talk tabs...
+               if( $title->isTalkPage() ) {
                        $other = $title->getSubjectPage();
                } else {
                        $other = $title->getTalkPage();
@@ -2756,57 +3172,81 @@ class Article {
 
                $title->touchLinks();
                $title->purgeSquid();
+               $title->deleteTitleProtection();
        }
 
-       static function onArticleDelete( $title ) {
-               global $wgUseFileCache, $wgMessageCache;
+       public static function onArticleDelete( $title ) {
+               global $wgMessageCache;
+               # Update existence markers on article/talk tabs...
+               if( $title->isTalkPage() ) {
+                       $other = $title->getSubjectPage();
+               } else {
+                       $other = $title->getTalkPage();
+               }
+               $other->invalidateCache();
+               $other->purgeSquid();
 
                $title->touchLinks();
                $title->purgeSquid();
 
                # File cache
-               if ( $wgUseFileCache ) {
-                       $cm = new HTMLFileCache( $title );
-                       @unlink( $cm->fileCacheName() );
-               }
+               HTMLFileCache::clearFileCache( $title );
 
-               if( $title->getNamespace() == NS_MEDIAWIKI) {
+               # Messages
+               if( $title->getNamespace() == NS_MEDIAWIKI ) {
                        $wgMessageCache->replace( $title->getDBkey(), false );
                }
+               # Images
+               if( $title->getNamespace() == NS_FILE ) {
+                       $update = new HTMLCacheUpdate( $title, 'imagelinks' );
+                       $update->doUpdate();
+               }
+               # User talk pages
+               if( $title->getNamespace() == NS_USER_TALK ) {
+                       $user = User::newFromName( $title->getText(), false );
+                       $user->setNewtalk( false );
+               }
        }
 
        /**
         * Purge caches on page update etc
         */
-       static function onArticleEdit( $title ) {
-               global $wgDeferredUpdateList, $wgUseFileCache;
+       public static function onArticleEdit( $title, $transclusions = 'transclusions' ) {
+               global $wgDeferredUpdateList;
 
                // Invalidate caches of articles which include this page
-               $update = new HTMLCacheUpdate( $title, 'templatelinks' );
-               $wgDeferredUpdateList[] = $update;
+               if( $transclusions !== 'skiptransclusions' )
+                       $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'templatelinks' );
+
+               // Invalidate the caches of all pages which redirect here
+               $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'redirect' );
 
                # Purge squid for this page only
                $title->purgeSquid();
 
-               # Clear file cache
-               if ( $wgUseFileCache ) {
-                       $cm = new HTMLFileCache( $title );
-                       @unlink( $cm->fileCacheName() );
-               }
+               # Clear file cache for this page only
+               HTMLFileCache::clearFileCache( $title );
        }
 
        /**#@-*/
 
+       /**
+        * Overriden by ImagePage class, only present here to avoid a fatal error
+        * Called for ?action=revert
+        */
+       public function revert() {
+               global $wgOut;
+               $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
+       }
+
        /**
         * Info about this page
         * Called for ?action=info when $wgAllowPageInfo is on.
-        *
-        * @public
         */
-       function info() {
+       public function info() {
                global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
 
-               if ( !$wgAllowPageInfo ) {
+               if( !$wgAllowPageInfo ) {
                        $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
                        return;
                }
@@ -2815,21 +3255,21 @@ class Article {
 
                $wgOut->setPagetitle( $page->getPrefixedText() );
                $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
-               $wgOut->setSubtitle( wfMsg( 'infosubtitle' ) );
+               $wgOut->setSubtitle( wfMsgHtml( 'infosubtitle' ) );
 
                if( !$this->mTitle->exists() ) {
-                       $wgOut->addHtml( '<div class="noarticletext">' );
+                       $wgOut->addHTML( '<div class="noarticletext">' );
                        if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
                                // This doesn't quite make sense; the user is asking for
                                // information about the _page_, not the message... -- RC
-                               $wgOut->addHtml( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
+                               $wgOut->addHTML( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
                        } else {
                                $msg = $wgUser->isLoggedIn()
                                        ? 'noarticletext'
                                        : 'noarticletextanon';
-                               $wgOut->addHtml( wfMsgExt( $msg, 'parse' ) );
+                               $wgOut->addHTML( wfMsgExt( $msg, 'parse' ) );
                        }
-                       $wgOut->addHtml( '</div>' );
+                       $wgOut->addHTML( '</div>' );
                } else {
                        $dbr = wfGetDB( DB_SLAVE );
                        $wl_clause = array(
@@ -2855,7 +3295,6 @@ class Article {
                                $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
                        }
                        $wgOut->addHTML( '</ul>' );
-
                }
        }
 
@@ -2863,34 +3302,30 @@ class Article {
         * Return the total number of edits and number of unique editors
         * on a given page. If page does not exist, returns false.
         *
-        * @param Title $title
+        * @param $title Title object
         * @return array
-        * @private
         */
-       function pageCountInfo( $title ) {
+       protected function pageCountInfo( $title ) {
                $id = $title->getArticleId();
                if( $id == 0 ) {
                        return false;
                }
-
                $dbr = wfGetDB( DB_SLAVE );
-
                $rev_clause = array( 'rev_page' => $id );
-
                $edits = $dbr->selectField(
                        'revision',
                        'COUNT(rev_page)',
                        $rev_clause,
                        __METHOD__,
-                       $this->getSelectOptions() );
-
+                       $this->getSelectOptions()
+               );
                $authors = $dbr->selectField(
                        'revision',
                        'COUNT(DISTINCT rev_user_text)',
                        $rev_clause,
                        __METHOD__,
-                       $this->getSelectOptions() );
-
+                       $this->getSelectOptions()
+               );
                return array( 'edits' => $edits, 'authors' => $authors );
        }
 
@@ -2898,25 +3333,22 @@ class Article {
         * Return a list of templates used by this article.
         * Uses the templatelinks table
         *
-        * @return array Array of Title objects
+        * @return Array of Title objects
         */
-       function getUsedTemplates() {
+       public function getUsedTemplates() {
                $result = array();
                $id = $this->mTitle->getArticleID();
                if( $id == 0 ) {
                        return array();
                }
-
                $dbr = wfGetDB( DB_SLAVE );
                $res = $dbr->select( array( 'templatelinks' ),
                        array( 'tl_namespace', 'tl_title' ),
                        array( 'tl_from' => $id ),
-                       'Article:getUsedTemplates' );
-               if ( false !== $res ) {
-                       if ( $dbr->numRows( $res ) ) {
-                               while ( $row = $dbr->fetchObject( $res ) ) {
-                                       $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
-                               }
+                       __METHOD__ );
+               if( $res !== false ) {
+                       foreach( $res as $row ) {
+                               $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
                        }
                }
                $dbr->freeResult( $res );
@@ -2924,80 +3356,77 @@ class Article {
        }
 
        /**
-        * Return an auto-generated summary if the text provided is a redirect.
+        * Returns a list of hidden categories this page is a member of.
+        * Uses the page_props and categorylinks tables.
         *
-        * @param  string $text The wikitext to check
-        * @return string '' or an appropriate summary
+        * @return Array of Title objects
         */
-       public static function getRedirectAutosummary( $text ) {
-               $rt = Title::newFromRedirect( $text );
-               if( is_object( $rt ) )
-                       return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
-               else
-                       return '';
-       }
-
-       /**
-        * Return an auto-generated summary if the new text is much shorter than
-        * the old text.
-        *
-        * @param  string $oldtext The previous text of the page
-        * @param  string $text    The submitted text of the page
-        * @return string An appropriate autosummary, or an empty string.
-        */
-       public static function getBlankingAutosummary( $oldtext, $text ) {
-               if ($oldtext!='' && $text=='') {
-                       return wfMsgForContent('autosumm-blank');
-               } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
-                       #Removing more than 90% of the article
-                       global $wgContLang;
-                       $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
-                       return wfMsgForContent('autosumm-replace', $truncatedtext);
-               } else {
-                       return '';
+       public function getHiddenCategories() {
+               $result = array();
+               $id = $this->mTitle->getArticleID();
+               if( $id == 0 ) {
+                       return array();
+               }
+               $dbr = wfGetDB( DB_SLAVE );
+               $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ),
+                       array( 'cl_to' ),
+                       array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat',
+                               'page_namespace' => NS_CATEGORY, 'page_title=cl_to'),
+                       __METHOD__ );
+               if( $res !== false ) {
+                       foreach( $res as $row ) {
+                               $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
+                       }
                }
+               $dbr->freeResult( $res );
+               return $result;
        }
 
        /**
        * Return an applicable autosummary if one exists for the given edit.
-       * @param string $oldtext The previous text of the page.
-       * @param string $newtext The submitted text of the page.
-       * @param bitmask $flags A bitmask of flags submitted for the edit.
+       * @param $oldtext String: the previous text of the page.
+       * @param $newtext String: The submitted text of the page.
+       * @param $flags Bitmask: a bitmask of flags submitted for the edit.
        * @return string An appropriate autosummary, or an empty string.
        */
        public static function getAutosummary( $oldtext, $newtext, $flags ) {
+               # Decide what kind of autosummary is needed.
 
-               # This code is UGLY UGLY UGLY.
-               # Somebody PLEASE come up with a more elegant way to do it.
-
-               #Redirect autosummaries
-               $summary = self::getRedirectAutosummary( $newtext );
-
-               if ($summary)
-                       return $summary;
-
-               #Blanking autosummaries
-               if (!($flags & EDIT_NEW))
-                       $summary = self::getBlankingAutosummary( $oldtext, $newtext );
-
-               if ($summary)
-                       return $summary;
+               # Redirect autosummaries
+               $ot = Title::newFromRedirect( $oldtext );
+               $rt = Title::newFromRedirect( $newtext );
+               if( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) {
+                       return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
+               }
 
-               #New page autosummaries
-               if ($flags & EDIT_NEW && strlen($newtext)) {
-                       #If they're making a new article, give its text, truncated, in the summary.
+               # New page autosummaries
+               if( $flags & EDIT_NEW && strlen( $newtext ) ) {
+                       # If they're making a new article, give its text, truncated, in the summary.
                        global $wgContLang;
                        $truncatedtext = $wgContLang->truncate(
                                str_replace("\n", ' ', $newtext),
-                               max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
+                               max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ),
                                '...' );
-                       $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
+                       return wfMsgForContent( 'autosumm-new', $truncatedtext );
                }
 
-               if ($summary)
-                       return $summary;
+               # Blanking autosummaries
+               if( $oldtext != '' && $newtext == '' ) {
+                       return wfMsgForContent( 'autosumm-blank' );
+               } elseif( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500) {
+                       # Removing more than 90% of the article
+                       global $wgContLang;
+                       $truncatedtext = $wgContLang->truncate(
+                               $newtext,
+                               max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ),
+                               '...'
+                       );
+                       return wfMsgForContent( 'autosumm-replace', $truncatedtext );
+               }
 
-               return $summary;
+               # If we reach this point, there's no applicable autosummary for our case, so our
+               # autosummary is empty.
+               return '';
        }
 
        /**
@@ -3005,23 +3434,31 @@ class Article {
         * Saves the text into the parser cache if possible.
         * Updates templatelinks if it is out of date.
         *
-        * @param string  $text
-        * @param bool    $cache
+        * @param $text String
+        * @param $cache Boolean
         */
        public function outputWikiText( $text, $cache = true ) {
-               global $wgParser, $wgUser, $wgOut;
+               global $wgParser, $wgUser, $wgOut, $wgEnableParserCache, $wgUseFileCache;
 
                $popts = $wgOut->parserOptions();
                $popts->setTidy(true);
+               $popts->enableLimitReport();
                $parserOutput = $wgParser->parse( $text, $this->mTitle,
                        $popts, true, true, $this->getRevIdFetched() );
                $popts->setTidy(false);
-               if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
-                       $parserCache =& ParserCache::singleton();
+               $popts->enableLimitReport( false );
+               if( $wgEnableParserCache && $cache && $this && $parserOutput->getCacheTime() != -1 ) {
+                       $parserCache = ParserCache::singleton();
                        $parserCache->save( $parserOutput, $this, $wgUser );
                }
+               // Make sure file cache is not used on uncacheable content.
+               // Output that has magic words in it can still use the parser cache
+               // (if enabled), though it will generally expire sooner.
+               if( $parserOutput->getCacheTime() == -1 || $parserOutput->containsOldMagic() ) {
+                       $wgUseFileCache = false;
+               }
 
-               if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
+               if( $this->isCurrent() && !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
                        // templatelinks table may have become out of sync,
                        // especially if using variable-based transclusions.
                        // For paranoia, check if things have changed and if
@@ -3038,15 +3475,13 @@ class Article {
                        $res = $dbr->select( array( 'templatelinks' ),
                                array( 'tl_namespace', 'tl_title' ),
                                array( 'tl_from' => $id ),
-                               'Article:getUsedTemplates' );
+                               __METHOD__ );
 
                        global $wgContLang;
 
-                       if ( false !== $res ) {
-                               if ( $dbr->numRows( $res ) ) {
-                                       while ( $row = $dbr->fetchObject( $res ) ) {
-                                               $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
-                                       }
+                       if( $res !== false ) {
+                               foreach( $res as $row ) {
+                                       $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
                                }
                        }
 
@@ -3061,20 +3496,70 @@ class Article {
                        # Get the diff
                        $templates_diff = array_diff( $poTemplates, $tlTemplates );
 
-                       if ( count( $templates_diff ) > 0 ) {
+                       if( count( $templates_diff ) > 0 ) {
                                # Whee, link updates time.
                                $u = new LinksUpdate( $this->mTitle, $parserOutput );
-
-                               $dbw = wfGetDb( DB_MASTER );
-                               $dbw->begin();
-
                                $u->doUpdate();
-
-                               $dbw->commit();
                        }
                }
 
                $wgOut->addParserOutput( $parserOutput );
        }
 
+       /**
+        * Update all the appropriate counts in the category table, given that
+        * we've added the categories $added and deleted the categories $deleted.
+        *
+        * @param $added array   The names of categories that were added
+        * @param $deleted array The names of categories that were deleted
+        * @return null
+        */
+       public function updateCategoryCounts( $added, $deleted ) {
+               $ns = $this->mTitle->getNamespace();
+               $dbw = wfGetDB( DB_MASTER );
+
+               # First make sure the rows exist.  If one of the "deleted" ones didn't
+               # exist, we might legitimately not create it, but it's simpler to just
+               # create it and then give it a negative value, since the value is bogus
+               # anyway.
+               #
+               # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
+               $insertCats = array_merge( $added, $deleted );
+               if( !$insertCats ) {
+                       # Okay, nothing to do
+                       return;
+               }
+               $insertRows = array();
+               foreach( $insertCats as $cat ) {
+                       $insertRows[] = array( 'cat_title' => $cat );
+               }
+               $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
+
+               $addFields    = array( 'cat_pages = cat_pages + 1' );
+               $removeFields = array( 'cat_pages = cat_pages - 1' );
+               if( $ns == NS_CATEGORY ) {
+                       $addFields[]    = 'cat_subcats = cat_subcats + 1';
+                       $removeFields[] = 'cat_subcats = cat_subcats - 1';
+               } elseif( $ns == NS_FILE ) {
+                       $addFields[]    = 'cat_files = cat_files + 1';
+                       $removeFields[] = 'cat_files = cat_files - 1';
+               }
+
+               if( $added ) {
+                       $dbw->update(
+                               'category',
+                               $addFields,
+                               array( 'cat_title' => $added ),
+                               __METHOD__
+                       );
+               }
+               if( $deleted ) {
+                       $dbw->update(
+                               'category',
+                               $removeFields,
+                               array( 'cat_title' => $deleted ),
+                               __METHOD__
+                       );
+               }
+       }
 }