* Display the anon talk page info message on anon talk pages again (moved outside...
[lhc/web/wiklou.git] / includes / Article.php
index ae767c5..4ede20f 100644 (file)
@@ -37,6 +37,7 @@ class Article {
        var $mRevIdFetched;
        var $mRevision;
        var $mRedirectUrl;
+       var $mLatest;
        /**#@-*/
 
        /**
@@ -49,10 +50,59 @@ class Article {
                $this->mOldId = $oldId;
                $this->clear();
        }
+       
+       /**
+        * Tell the page view functions that this view was redirected
+        * from another page on the wiki.
+        * @param Title $from
+        */
+       function setRedirectedFrom( $from ) {
+               $this->mRedirectedFrom = $from;
+       }
+       
+       /**
+        * @return mixed false, Title of in-wiki target, or string with URL
+        */
+       function followRedirect() {
+               $text = $this->getContent();
+               $rt = Title::newFromRedirect( $text );
+               
+               # process if title object is valid and not special:userlogout
+               if( $rt ) {
+                       if( $rt->getInterwiki() != '' ) {
+                               if( $rt->isLocal() ) {
+                                       // Offsite wikis need an HTTP redirect.
+                                       //
+                                       // 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 ) );
+                               }
+                       } else {
+                               if( $rt->getNamespace() == NS_SPECIAL ) {
+                                       // Gotta hand redirects to special pages differently:
+                                       // Fill the HTTP response "Location" header and ignore
+                                       // the rest of the page we're on.
+                                       //
+                                       // This can be hard to reverse, so they may be disabled.
+                                       
+                                       if( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) {
+                                               // rolleyes
+                                       } else {
+                                               return $rt->getFullURL();
+                                       }
+                               }
+                               return $rt;
+                       }
+               }
+               
+               // No or invalid redirect
+               return false;
+       }
 
        /**
         * get the title object of the article
-        * @public
         */
        function getTitle() {
                return $this->mTitle;
@@ -60,14 +110,15 @@ class Article {
 
        /**
          * Clear the object
-         * @private
+         * @access private
          */
        function clear() {
                $this->mDataLoaded    = false;
                $this->mContentLoaded = false;
 
                $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
-               $this->mRedirectedFrom = $this->mUserText =
+               $this->mRedirectedFrom = null; # Title object if set
+               $this->mUserText =
                $this->mTimestamp = $this->mComment = $this->mFileCache = '';
                $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
                $this->mTouched = '19700101000000';
@@ -75,16 +126,21 @@ class Article {
                $this->mIsRedirect = false;
                $this->mRevIdFetched = 0;
                $this->mRedirectUrl = false;
+               $this->mLatest = false;
        }
 
        /**
-        * Note that getContent/loadContent may follow redirects if
-        * not told otherwise, and so may cause a change to mTitle.
+        * Note that getContent/loadContent do not follow redirects anymore.
+        * If you need to fetch redirectable content easily, try
+        * the shortcut in Article::followContent()
+        *
+        * @fixme 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.
         *
-        * @param $noredir
         * @return Return the text of this revision
        */
-       function getContent( $noredir ) {
+       function getContent() {
                global $wgRequest, $wgUser, $wgOut;
 
                # Get variables from query string :P
@@ -109,64 +165,59 @@ class Article {
                        }
                        wfProfileOut( $fname );
                        $wgOut->setRobotpolicy( 'noindex,nofollow' );
-                       
+
                        if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
                                $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
                        } else {
                                $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
                        }
-                       
+
                        return "<div class='noarticletext'>$ret</div>";
                } else {
-                       $this->loadContent( $noredir );
-                       # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
-                       if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
-                         $wgUser->isIP($this->mTitle->getText()) &&
-                         $action=='view'
-                       ) {
-                               wfProfileOut( $fname );
-                               return $this->mContent . "\n" .wfMsg('anontalkpagetext');
-                       } else {
-                               if($action=='edit') {
-                                       if($section!='') {
-                                               if($section=='new') {
-                                                       wfProfileOut( $fname );
-                                                       $text=$this->getPreloadedText($preload);
-                                                       return $text;
-                                               }
-
-                                               # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
-                                               # comments to be stripped as well)
-                                               $rv=$this->getSection($this->mContent,$section);
+                       $this->loadContent();
+                       if($action=='edit') {
+                               if($section!='') {
+                                       if($section=='new') {
                                                wfProfileOut( $fname );
-                                               return $rv;
+                                               $text=$this->getPreloadedText($preload);
+                                               return $text;
                                        }
+
+                                       # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
+                                       # comments to be stripped as well)
+                                       $rv=$this->getSection($this->mContent,$section);
+                                       wfProfileOut( $fname );
+                                       return $rv;
                                }
-                               wfProfileOut( $fname );
-                               return $this->mContent;
                        }
+                       wfProfileOut( $fname );
+                       return $this->mContent;
                }
        }
 
        /**
-               This function accepts a title string as parameter
-               ($preload). If this string is non-empty, it attempts
-               to fetch the current revision text. It respects
-               <includeonly>.
-       */
+        * Get the contents of a page from its title and remove includeonly tags
+        *
+        * @param string The title of the page
+        * @return string The contents of the page
+        */
        function getPreloadedText($preload) {
-               if($preload) {
-                       $preloadTitle=Title::newFromText($preload);
-                       if(isset($preloadTitle) && $preloadTitle->userCanRead()) {
-                       $rev=Revision::newFromTitle($preloadTitle);
-                       if($rev) {
-                               $text=$rev->getText();
-                               $text=preg_replace('/<\/?includeonly>/i','',$text);
-                               return $text;
-                               }
+               if ( $preload === '' )
+                       return '';
+               else {
+                       $preloadTitle = Title::newFromText( $preload );
+                       if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
+                               $rev=Revision::newFromTitle($preloadTitle);
+                               if ( is_object( $rev ) ) {
+                                       $text = $rev->getText();
+                                       // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
+                                       // its own mini-parser! -ævar
+                                       $text = preg_replace( '~</?includeonly>~', '', $text );
+                                       return $text;
+                               } else
+                                       return '';
                        }
                }
-               return '';
        }
 
        /**
@@ -194,14 +245,14 @@ class Article {
                # split it up by section
                $secs =
                  preg_split(
-                 '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
+                 '/(^=+.+?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)(?!\S)/mi',
                  $striptext, -1,
                  PREG_SPLIT_DELIM_CAPTURE);
                if($section==0) {
                        $rv=$secs[0];
                } else {
                        $headline=$secs[$section*2-1];
-                       preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
+                       preg_match( '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$headline,$matches);
                        $hlevel=$matches[1];
 
                        # translate wiki heading into level
@@ -216,7 +267,7 @@ class Article {
                        while(!empty($secs[$count*2-1]) && !$break) {
 
                                $subheadline=$secs[$count*2-1];
-                               preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
+                               preg_match( '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$subheadline,$matches);
                                $subhlevel=$matches[1];
                                if(strpos($subhlevel,'=')!==false) {
                                        $subhlevel=strlen($subhlevel);
@@ -240,7 +291,8 @@ class Article {
        }
 
        /**
-        * Return the oldid of the article that is to be shown, 0 for the current revision
+        * @return int The oldid of the article that is to be shown, 0 for the
+        *             current revision
         */
        function getOldID() {
                if ( is_null( $this->mOldId ) ) {
@@ -250,8 +302,9 @@ class Article {
        }
 
        /**
-        * Get the old ID from the request, return it.
         * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
+        *
+        * @return int The old id for the request
         */
        function getOldIDFromRequest() {
                global $wgRequest;
@@ -285,14 +338,11 @@ class Article {
        /**
         * Load the revision (including text) into this object
         */
-       function loadContent( $noredir = false ) {
-               global $wgOut, $wgRequest;
-
+       function loadContent() {
                if ( $this->mContentLoaded ) return;
 
                # Query variables :P
                $oldid = $this->getOldID();
-               $redirect = $wgRequest->getVal( 'redirect' );
 
                $fname = 'Article::loadContent';
 
@@ -301,10 +351,8 @@ class Article {
 
                $t = $this->mTitle->getPrefixedText();
 
-               $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no')
-                       || $wgRequest->getCheck( 'rdfrom' );
                $this->mOldId = $oldid;
-               $this->fetchContent( $oldid, $noredir, true );
+               $this->fetchContent( $oldid );
        }
 
 
@@ -336,15 +384,22 @@ class Article {
                return $row ;
        }
 
+       /**
+        * @param Database $dbr
+        * @param Title $title
+        */
        function pageDataFromTitle( &$dbr, $title ) {
                return $this->pageData( $dbr, array(
                        'page_namespace' => $title->getNamespace(),
                        'page_title'     => $title->getDBkey() ) );
        }
 
+       /**
+        * @param Database $dbr
+        * @param int $id
+        */
        function pageDataFromId( &$dbr, $id ) {
-               return $this->pageData( $dbr, array(
-                       'page_id' => intval( $id ) ) );
+               return $this->pageData( $dbr, array( 'page_id' => $id ) );
        }
 
        /**
@@ -354,30 +409,45 @@ class Article {
         * @param object $data
         * @access private
         */
-       function loadPageData( $data ) {
-               $this->mTitle->loadRestrictions( $data->page_restrictions );
-               $this->mTitle->mRestrictionsLoaded = true;
-
-               $this->mCounter     = $data->page_counter;
-               $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
-               $this->mIsRedirect  = $data->page_is_redirect;
-               $this->mLatest      = $data->page_latest;
+       function loadPageData( $data = 'fromdb' ) {
+               if ( $data === 'fromdb' ) {
+                       $dbr =& $this->getDB();
+                       $data = $this->pageDataFromId( $dbr, $this->getId() );
+               }
+                       
+               $lc =& LinkCache::singleton();
+               if ( $data ) {
+                       $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
+
+                       $this->mTitle->mArticleID = $data->page_id;
+                       $this->mTitle->loadRestrictions( $data->page_restrictions );
+                       $this->mTitle->mRestrictionsLoaded = true;
+
+                       $this->mCounter     = $data->page_counter;
+                       $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
+                       $this->mIsRedirect  = $data->page_is_redirect;
+                       $this->mLatest      = $data->page_latest;
+               } else {
+                       if ( is_object( $this->mTitle ) ) {
+                               $lc->addBadLinkObj( $this->mTitle );
+                       }
+                       $this->mTitle->mArticleID = 0;
+               }
 
                $this->mDataLoaded  = true;
        }
 
        /**
         * Get text of an article from database
+        * Does *NOT* follow redirects.
         * @param int $oldid 0 for whatever the latest revision is
-        * @param bool $noredir Set to false to follow redirects
-        * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
         * @return string
         */
-       function fetchContent( $oldid = 0, $noredir = true, $globalTitle = false ) {
+       function fetchContent( $oldid = 0 ) {
                if ( $this->mContentLoaded ) {
                        return $this->mContent;
                }
-               
+
                $dbr =& $this->getDB();
                $fname = 'Article::fetchContent';
 
@@ -387,10 +457,6 @@ class Article {
                if( $oldid ) {
                        $t .= ',oldid='.$oldid;
                }
-               if( isset( $redirect ) ) {
-                       $redirect = ($redirect == 'no') ? 'no' : 'yes';
-                       $t .= ',redirect='.$redirect;
-               }
                $this->mContent = wfMsg( 'missingarticle', $t ) ;
 
                if( $oldid ) {
@@ -417,59 +483,15 @@ class Article {
                        }
                        $revision = Revision::newFromId( $this->mLatest );
                        if( is_null( $revision ) ) {
-                               wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
+                               wfDebug( "$fname failed to retrieve current page, rev_id {$data->page_latest}\n" );
                                return false;
                        }
                }
 
-               # If we got a redirect, follow it (unless we've been told
-               # not to by either the function parameter or the query
-               if ( !$oldid && !$noredir ) {
-                       $rt = Title::newFromRedirect( $revision->getText() );
-                       # process if title object is valid and not special:userlogout
-                       if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
-                               # Gotta hand redirects to special pages differently:
-                               # Fill the HTTP response "Location" header and ignore
-                               # the rest of the page we're on.
-                               global $wgDisableHardRedirects;
-                               if( $globalTitle && !$wgDisableHardRedirects ) {
-                                       global $wgOut;
-                                       if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
-                                               $source = $this->mTitle->getFullURL( 'redirect=no' );
-                                               $wgOut->redirect( $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ) ) ;
-                                               return false;
-                                       }
-                                       if ( $rt->getNamespace() == NS_SPECIAL ) {
-                                               $wgOut->redirect( $rt->getFullURL() );
-                                               return false;
-                                       }
-                               }
-                               if( $rt->getInterwiki() == '' ) {
-                                       $redirData = $this->pageDataFromTitle( $dbr, $rt );
-                                       if( $redirData ) {
-                                               $redirRev = Revision::newFromId( $redirData->page_latest );
-                                               if( !is_null( $redirRev ) ) {
-                                                       $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
-                                                       $this->mTitle = $rt;
-                                                       $data = $redirData;
-                                                       $this->loadPageData( $data );
-                                                       $revision = $redirRev;
-                                               }
-                                       }
-                               }
-                       }
-               }
-
-               # if the title's different from expected, update...
-               if( $globalTitle ) {
-                       global $wgTitle;
-                       if( !$this->mTitle->equals( $wgTitle ) ) {
-                               $wgTitle = $this->mTitle;
-                       }
-               }
-
-               # Back to the business at hand...
-               $this->mContent   = $revision->getText();
+               // 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( MW_REV_DELETED_TEXT ) ? $revision->getRawText() : "";
+               //$this->mContent   = $revision->getText();
 
                $this->mUser      = $revision->getUser();
                $this->mUserText  = $revision->getUserText();
@@ -485,18 +507,10 @@ class Article {
                return $this->mContent;
        }
 
-       /**
-        * Gets the article text without using so many damn globals
-        * Returns false on error
-        *
-        * @param integer $oldid
-        */
-       function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
-               return $this->fetchContent( $oldid, $noredir, false );
-       }
-
        /**
         * Read/write accessor to select FOR UPDATE
+        *
+        * @param mixed $x
         */
        function forUpdate( $x = NULL ) {
                return wfSetVar( $this->mForUpdate, $x );
@@ -504,21 +518,20 @@ class Article {
 
        /**
         * Get the database which should be used for reads
+        *
+        * @return Database
         */
        function &getDB() {
                $ret =& wfGetDB( DB_MASTER );
                return $ret;
-               #if ( $this->mForUpdate ) {
-                       $ret =& wfGetDB( DB_MASTER );
-               #} else {
-               #       $ret =& wfGetDB( DB_SLAVE );
-               #}
-               return $ret;
        }
 
        /**
         * Get options for all SELECT statements
-        * Can pass an option array, to which the class-wide options will be appended
+        *
+        * @param array $options an optional options array which'll be appended to
+        *                       the default
+        * @return array Options
         */
        function getSelectOptions( $options = '' ) {
                if ( $this->mForUpdate ) {
@@ -532,7 +545,7 @@ class Article {
        }
 
        /**
-        * Return the Article ID
+        * @return int Page ID
         */
        function getID() {
                if( $this->mTitle ) {
@@ -543,44 +556,51 @@ class Article {
        }
 
        /**
-        * Returns true if this article exists in the database.
-        * @return bool
+        * @return bool Whether or not the page exists in the database
         */
        function exists() {
                return $this->getId() != 0;
        }
 
        /**
-        * Get the view count for this article
+        * @return int The view count for the page
         */
        function getCount() {
                if ( -1 == $this->mCounter ) {
                        $id = $this->getID();
-                       $dbr =& $this->getDB();
-                       $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
-                               'Article::getCount', $this->getSelectOptions() );
+                       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() );
+                       }
                }
                return $this->mCounter;
        }
 
        /**
-        * Would the given text make this article a "good" article (i.e.,
-        * suitable for including in the article count)?
+        * Determine whether a page  would be suitable for being counted as an
+        * article in the site_stats table based on the title & its content
+        *
         * @param string $text Text to analyze
-        * @return integer 1 if it can be counted else 0
+        * @return bool
         */
        function isCountable( $text ) {
                global $wgUseCommaCount;
 
-               if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
-               if ( $this->isRedirect( $text ) ) { return 0; }
-               $token = ($wgUseCommaCount ? ',' : '[[' );
-               if ( false === strstr( $text, $token ) ) { return 0; }
-               return 1;
+               $token = $wgUseCommaCount ? ',' : '[[';
+               return
+                       $this->mTitle->getNamespace() == NS_MAIN
+                       && ! $this->isRedirect( $text )
+                       && in_string( $token, $text );
        }
 
        /**
         * Tests if the article text represents a redirect
+        *
+        * @param string $text
+        * @return bool
         */
        function isRedirect( $text = false ) {
                if ( $text === false ) {
@@ -606,11 +626,9 @@ class Article {
        /**
         * Loads everything except the text
         * This isn't necessary for all uses, so it's only done if needed.
-        * @private
+        * @access private
         */
        function loadLastEdit() {
-               global $wgOut;
-
                if ( -1 != $this->mUser )
                        return;
 
@@ -630,7 +648,10 @@ class Article {
        }
 
        function getTimestamp() {
-               $this->loadLastEdit();
+               // Check if the field has been filled by ParserCache::get()
+               if ( !$this->mTimestamp ) {
+                       $this->loadLastEdit();
+               }
                return wfTimestamp(TS_MW, $this->mTimestamp);
        }
 
@@ -666,7 +687,7 @@ class Article {
 
                $title = $this->mTitle;
                $contribs = array();
-               $dbr =& $this->getDB();
+               $dbr =& wfGetDB( DB_SLAVE );
                $revTable = $dbr->tableName( 'revision' );
                $userTable = $dbr->tableName( 'user' );
                $encDBkey = $dbr->addQuotes( $title->getDBkey() );
@@ -699,13 +720,14 @@ class Article {
         * the given title.
        */
        function view() {
-               global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgContLang;
+               global $wgUser, $wgOut, $wgRequest, $wgContLang;
                global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
-               global $wgParserCache, $wgUseTrackbacks;
+               global $wgUseTrackbacks;
                $sk = $wgUser->getSkin();
 
                $fname = 'Article::view';
                wfProfileIn( $fname );
+               $parserCache =& ParserCache::singleton();
                # Get variables from query string
                $oldid = $this->getOldID();
 
@@ -741,9 +763,9 @@ class Article {
                        wfProfileOut( $fname );
                        return;
                }
-
+               
                if ( empty( $oldid ) && $this->checkTouched() ) {
-                       $wgOut->setETag($wgParserCache->getETag($this, $wgUser));
+                       $wgOut->setETag($parserCache->getETag($this, $wgUser));
 
                        if( $wgOut->checkLastModified( $this->mTouched ) ){
                                wfProfileOut( $fname );
@@ -766,6 +788,30 @@ class Article {
                        wfIncrStats( 'pcache_miss_stub' );
                }
 
+               $wasRedirected = false;
+               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();
+                               $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
+                               $s = wfMsg( 'redirectedfrom', $redir );
+                               $wgOut->setSubtitle( $s );
+                               $wasRedirected = true;
+                       }
+               } 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 );
+                               $wgOut->setSubtitle( $s );
+                               $wasRedirected = true;
+                       }
+               }
+               
                $outputDone = false;
                if ( $pcache ) {
                        if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
@@ -773,21 +819,19 @@ class Article {
                        }
                }
                if ( !$outputDone ) {
-                       $text = $this->getContent( false ); # May change mTitle by following a redirect
+                       $text = $this->getContent();
                        if ( $text === false ) {
                                # Failed to load, replace text with error message
                                $t = $this->mTitle->getPrefixedText();
                                if( $oldid ) {
                                        $t .= ',oldid='.$oldid;
+                                       $text = wfMsg( 'missingarticle', $t );
+                               } else {
+                                       $text = wfMsg( 'noarticletext', $t );
                                }
-                               if( isset( $redirect ) ) {
-                                       $redirect = ($redirect == 'no') ? 'no' : 'yes';
-                                       $t .= ',redirect='.$redirect;
-                               }
-                               $text = wfMsg( 'missingarticle', $t );
                        }
 
-                       # Another whitelist check in case oldid or redirects are altering the title
+                       # Another whitelist check in case oldid is altering the title
                        if ( !$this->mTitle->userCanRead() ) {
                                $wgOut->loginToUse();
                                $wgOut->output();
@@ -797,34 +841,23 @@ class Article {
                        # We're looking at an old revision
 
                        if ( !empty( $oldid ) ) {
-                               $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
-                               $wgOut->setRobotpolicy( 'noindex,follow' );
-                       }
-                       $wasRedirected = false;
-                       if ( '' != $this->mRedirectedFrom ) {
-                               if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
-                                       $sk = $wgUser->getSkin();
-                                       $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '', 'redirect=no' );
-                                       $s = wfMsg( 'redirectedfrom', $redir );
-                                       $wgOut->setSubtitle( $s );
-                                       
-                                       // Check the parser cache again, for the target page
-                                       if( $pcache ) {
-                                               if( $wgOut->tryParserCache( $this, $wgUser ) ) {
-                                                       $outputDone = true;
+                               $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( $this->mRevision->isDeleted( MW_REV_DELETED_TEXT ) ) {
+                                               if( !$this->mRevision->userCan( MW_REV_DELETED_TEXT ) ) {
+                                                       $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
+                                                       $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
+                                                       return;
+                                               } else {
+                                                       $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
+                                                       // and we are allowed to see...
                                                }
                                        }
-                                       $wasRedirected = true;
-                               }
-                       } elseif ( !empty( $rdfrom ) ) {
-                               global $wgRedirectSources;
-                               if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
-                                       $sk = $wgUser->getSkin();
-                                       $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
-                                       $s = wfMsg( 'redirectedfrom', $redir );
-                                       $wgOut->setSubtitle( $s );
-                                       $wasRedirected = true;
                                }
+
                        }
                }
                if( !$outputDone ) {
@@ -833,13 +866,13 @@ class Article {
                         * trigger when the parser cache is used.
                         */
                        wfRunHooks( 'ArticleViewHeader', array( &$this ) ) ;
+                       $wgOut->setRevisionId( $this->getRevIdFetched() );
                        # wrap user css and user js in pre and don't parse
                        # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
                        if (
                                $this->mTitle->getNamespace() == NS_USER &&
                                preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
                        ) {
-                               $wgOut->setRevisionId( $this->getRevIdFetched() );
                                $wgOut->addWikiText( wfMsg('clearyourcache'));
                                $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
                        } else if ( $rt = Title::newFromRedirect( $text ) ) {
@@ -860,7 +893,6 @@ class Article {
                                $wgOut->addParserOutputNoText( $parseout );
                        } else if ( $pcache ) {
                                # Display content and save to parser cache
-                               $wgOut->setRevisionId( $this->getRevIdFetched() );
                                $wgOut->addPrimaryWikiText( $text, $this );
                        } else {
                                # Display content, don't attempt to save to parser cache
@@ -869,8 +901,8 @@ class Article {
                                if( !$this->isCurrent() ) {
                                        $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
                                }
-                               $wgOut->setRevisionId( $this->getRevIdFetched() );
-                               $wgOut->addWikiText( $text );
+                               # Display content and don't save to parser cache
+                               $wgOut->addPrimaryWikiText( $text, $this, false );
 
                                if( !$this->isCurrent() ) {
                                        $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
@@ -882,15 +914,16 @@ class Article {
                if( empty( $t ) ) {
                        $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
                }
+               
+               # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
+               if( $this->mTitle->getNamespace() == NS_USER_TALK &&
+                       User::isIP( $this->mTitle->getText() ) ) {
+                       $wgOut->addWikiText( wfMsg('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->isLoggedIn()
-                       && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
-               {
+               if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
                        $wgOut->addHTML(
                                "<div class='patrollink'>" .
                                        wfMsg ( 'markaspatrolledlink',
@@ -969,29 +1002,22 @@ class Article {
                $wgOut->setArticleBodyOnly(true);
                $this->view();
        }
-       
-       function purge() {
-               global $wgUser, $wgRequest, $wgOut, $wgUseSquid;
-
-               if ( $wgUser->isLoggedIn() || $wgRequest->wasPosted() || ! wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
-                       // Invalidate the cache
-                       $this->mTitle->invalidateCache();
 
-                       if ( $wgUseSquid ) {
-                               // Commit the transaction before the purge is sent
-                               $dbw = wfGetDB( DB_MASTER );
-                               $dbw->immediateCommit();
+       /**
+        * Handle action=purge
+        */
+       function purge() {
+               global $wgUser, $wgRequest, $wgOut;
 
-                               // Send purge
-                               $update = SquidUpdate::newSimplePurge( $this->mTitle );
-                               $update->doUpdate();
+               if ( $wgUser->isLoggedIn() || $wgRequest->wasPosted() ) {
+                       if( wfRunHooks( 'ArticlePurge', array( &$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', 
+                       $msg = str_replace( '$1',
                                "<form method=\"post\" action=\"$action\">\n" .
                                "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
                                "</form>\n", $msg );
@@ -1001,6 +1027,26 @@ class Article {
                        $wgOut->addHTML( $msg );
                }
        }
+       
+       /**
+        * Perform the actions of a page purging
+        */
+       function doPurge() {
+               global $wgUseSquid;
+               // Invalidate the cache
+               $this->mTitle->invalidateCache();
+
+               if ( $wgUseSquid ) {
+                       // Commit the transaction before the purge is sent
+                       $dbw = wfGetDB( DB_MASTER );
+                       $dbw->immediateCommit();
+
+                       // Send purge
+                       $update = SquidUpdate::newSimplePurge( $this->mTitle );
+                       $update->doUpdate();
+               }
+               $this->view();
+       }
 
        /**
         * Insert a new empty page record for this article.
@@ -1044,12 +1090,12 @@ class Article {
         * 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 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.
         * @return bool true on success, false on failure
         * @access private
         */
@@ -1114,14 +1160,11 @@ class Article {
        }
 
        /**
-        * Theoretically we could defer these whole insert and update
-        * functions for after display, but that's taking a big leap
-        * of faith, and we want to be able to report database
-        * errors at some point.
-        * @private
+        * Insert a new article into the database
+        * @access private
         */
        function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
-               global $wgOut, $wgUser, $wgUseSquid;
+               global $wgUser;
 
                $fname = 'Article::insertNewArticle';
                wfProfileIn( $fname );
@@ -1132,9 +1175,6 @@ class Article {
                        wfProfileOut( $fname );
                        return false;
                }
-               
-               $this->mGoodAdjustment = $this->isCountable( $text );
-               $this->mTotalAdjustment = 1;
 
                $ns = $this->mTitle->getNamespace();
                $ttl = $this->mTitle->getDBkey();
@@ -1144,7 +1184,16 @@ class Article {
                        $text="== {$summary} ==\n\n".$text;
                }
                $text = $this->preSaveTransform( $text );
-               $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
+
+
+               # Set statistics members
+               # We work out if it's countable after PST to avoid counter drift 
+               # when articles are created with {{subst:}}
+               $this->mGoodAdjustment = (int)$this->isCountable( $text );
+               $this->mTotalAdjustment = 1;
+
+               /* Silently ignore minoredit if not allowed */
+               $isminor = $isminor && $wgUser->isAllowed('minoredit');
                $now = wfTimestampNow();
 
                $dbw =& wfGetDB( DB_MASTER );
@@ -1168,15 +1217,20 @@ class Article {
 
                Article::onArticleCreate( $this->mTitle );
                if(!$suppressRC) {
-                       RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
+                       require_once( 'RecentChange.php' );
+                       $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
                          '', strlen( $text ), $revisionId );
+                       # Mark as patrolled if the user can and has the option set
+                       if( $wgUser->isAllowed( 'patrol' ) && $wgUser->getOption( 'autopatrol' ) ) {
+                               RecentChange::markPatrolled( $rcid );
+                       }
                }
 
                if ($watchthis) {
-                       if(!$this->mTitle->userIsWatching()) $this->watch();
+                       if(!$this->mTitle->userIsWatching()) $this->doWatch();
                } else {
                        if ( $this->mTitle->userIsWatching() ) {
-                               $this->unwatch();
+                               $this->doUnwatch();
                        }
                }
 
@@ -1245,7 +1299,7 @@ class Article {
                                # split it up
                                # Unfortunately we can't simply do a preg_replace because that might
                                # replace the wrong section, so we have to use the section counter instead
-                               $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
+                               $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)(?!\S)/mi',
                                  $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
                                $secs[$section*2]=$text."\n\n"; // replace with edited
 
@@ -1257,7 +1311,7 @@ class Article {
                                        # be erased, as the mother section has been replaced with
                                        # the text of all subsections.
                                        $headline=$secs[$section*2-1];
-                                       preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
+                                       preg_match( '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$headline,$matches);
                                        $hlevel=$matches[1];
 
                                        # determine headline level for wikimarkup headings
@@ -1272,7 +1326,7 @@ class Article {
 
                                                $subheadline=$secs[$count*2-1];
                                                preg_match(
-                                                '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
+                                                '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$subheadline,$matches);
                                                $subhlevel=$matches[1];
                                                if(strpos($subhlevel,'=')!==false) {
                                                        $subhlevel=strlen($subhlevel);
@@ -1309,7 +1363,7 @@ class Article {
         * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
         */
        function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
-               global $wgOut, $wgUser, $wgDBtransactions, $wgMwRedir, $wgUseSquid;
+               global $wgUser, $wgDBtransactions, $wgUseSquid;
                global $wgPostCommitUpdateList, $wgUseFileCache;
 
                $fname = 'Article::updateArticle';
@@ -1324,12 +1378,8 @@ class Article {
                        return false;
                }
 
-               $isminor = ( $minor && $wgUser->isLoggedIn() );
-               if ( $this->isRedirect( $text ) ) {
-                       $redir = 1;
-               } else { 
-                       $redir = 0; 
-               }
+               $isminor = $minor && $wgUser->isAllowed('minoredit');
+               $redir = (int)$this->isRedirect( $text );
 
                $text = $this->preSaveTransform( $text );
                $dbw =& wfGetDB( DB_MASTER );
@@ -1344,15 +1394,15 @@ class Article {
                        $userAbort = ignore_user_abort( true );
                }
 
-               $oldtext = $this->getContent( true );
+               $oldtext = $this->getContent();
                $oldsize = strlen( $oldtext );
                $newsize = strlen( $text );
                $lastRevision = 0;
                $revisionId = 0;
 
                if ( 0 != strcmp( $text, $oldtext ) ) {
-                       $this->mGoodAdjustment = $this->isCountable( $text )
-                         - $this->isCountable( $oldtext );
+                       $this->mGoodAdjustment = (int)$this->isCountable( $text )
+                         - (int)$this->isCountable( $oldtext );
                        $this->mTotalAdjustment = 0;
                        $now = wfTimestampNow();
 
@@ -1365,7 +1415,7 @@ class Article {
                                'minor_edit' => $isminor,
                                'text'       => $text
                                ) );
-                       
+
                        $dbw->immediateCommit();
                        $dbw->begin();
                        $revisionId = $revision->insertOn( $dbw );
@@ -1379,12 +1429,19 @@ class Article {
                                $dbw->rollback();
                        } else {
                                # Update recentchanges and purge cache and whatnot
+                               require_once( 'RecentChange.php' );
                                $bot = (int)($wgUser->isBot() || $forceBot);
-                               RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
+                               $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 and has it set in their options
+                               if( $wgUser->isAllowed( 'patrol' ) && $wgUser->getOption( 'autopatrol' ) ) {
+                                       RecentChange::markPatrolled( $rcid );
+                               }
+                                       
                                $dbw->commit();
-                               
+
                                // Update caches outside the main transaction
                                Article::onArticleEdit( $this->mTitle );
                        }
@@ -1402,14 +1459,14 @@ class Article {
                                if (!$this->mTitle->userIsWatching()) {
                                        $dbw->immediateCommit();
                                        $dbw->begin();
-                                       $this->watch();
+                                       $this->doWatch();
                                        $dbw->commit();
                                }
                        } else {
                                if ( $this->mTitle->userIsWatching() ) {
                                        $dbw->immediateCommit();
                                        $dbw->begin();
-                                       $this->unwatch();
+                                       $this->doUnwatch();
                                        $dbw->commit();
                                }
                        }
@@ -1419,7 +1476,7 @@ class Article {
 
                        $urls = array();
                        # Invalidate caches of all articles using this article as a template
-                       
+
                        # Template namespace
                        # Purge all articles linking here
                        $titles = $this->mTitle->getTemplateLinksTo();
@@ -1458,19 +1515,18 @@ class Article {
         * the link tables and redirect to the new page.
         */
        function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
-               global $wgOut, $wgUser;
-               global $wgUseEnotif;
+               global $wgOut;
 
                $fname = 'Article::showArticle';
                wfProfileIn( $fname );
-               
+
                # Output the redirect
                if( $this->isRedirect( $text ) )
                        $r = 'redirect=no';
                else
                        $r = '';
                $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
-               
+
                wfProfileOut( $fname );
        }
 
@@ -1478,42 +1534,40 @@ class Article {
         * Mark this particular edit as patrolled
         */
        function markpatrolled() {
-               global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
+               global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
                $wgOut->setRobotpolicy( 'noindex,follow' );
 
-               if ( !$wgUseRCPatrol )
-               {
-                       $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
-                       return;
-               }
-               if ( $wgUser->isAnon() )
-               {
-                       $wgOut->loginToUse();
+               # Check RC patrol config. option
+               if( !$wgUseRCPatrol ) {
+                       $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
                        return;
                }
-               if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
-               {
-                       $wgOut->sysopRequired();
+               
+               # Check permissions
+               if( !$wgUser->isAllowed( 'patrol' ) ) {
+                       $wgOut->permissionRequired( 'patrol' );
                        return;
                }
+               
                $rcid = $wgRequest->getVal( 'rcid' );
-               if ( !is_null ( $rcid ) )
-               {
-                       RecentChange::markPatrolled( $rcid );
-                       $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
-                       $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
-
+               if ( !is_null ( $rcid ) ) {
+                       if( wfRunHooks( 'MarkPatrolled', array( &$rcid, &$wgUser, false ) ) ) {
+                               require_once( 'RecentChange.php' );
+                               RecentChange::markPatrolled( $rcid );
+                               wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
+                               $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
+                               $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
+                       }
                        $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
                        $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
                }
-               else
-               {
+               else {
                        $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
                }
        }
 
        /**
-        * Add this page to $wgUser's watchlist
+        * User-interface handler for the "watch" action
         */
 
        function watch() {
@@ -1528,14 +1582,8 @@ class Article {
                        $wgOut->readOnlyPage();
                        return;
                }
-
-               if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
-
-                       $wgUser->addWatch( $this->mTitle );
-                       $wgUser->saveSettings();
-
-                       wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
-
+               
+               if( $this->doWatch() ) {
                        $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
                        $wgOut->setRobotpolicy( 'noindex,follow' );
 
@@ -1546,11 +1594,30 @@ class Article {
 
                $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
        }
-
+       
        /**
-        * Stop watching a page
+        * Add this page to $wgUser's watchlist
+        * @return bool true on successful watch operation
         */
+       function doWatch() {
+               global $wgUser;
+               if( $wgUser->isAnon() ) {
+                       return false;
+               }
+               
+               if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
+                       $wgUser->addWatch( $this->mTitle );
+                       $wgUser->saveSettings();
+
+                       return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
+               }
+               
+               return false;
+       }
 
+       /**
+        * User interface handler for the "unwatch" action.
+        */
        function unwatch() {
 
                global $wgUser, $wgOut;
@@ -1563,14 +1630,8 @@ class Article {
                        $wgOut->readOnlyPage();
                        return;
                }
-
-               if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
-
-                       $wgUser->removeWatch( $this->mTitle );
-                       $wgUser->saveSettings();
-
-                       wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
-
+               
+               if( $this->doUnwatch() ) {
                        $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
                        $wgOut->setRobotpolicy( 'noindex,follow' );
 
@@ -1581,6 +1642,26 @@ class Article {
 
                $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
        }
+       
+       /**
+        * Stop watching a page
+        * @return bool true on successful unwatch
+        */
+       function doUnwatch() {
+               global $wgUser;
+               if( $wgUser->isAnon() ) {
+                       return false;
+               }
+
+               if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
+                       $wgUser->removeWatch( $this->mTitle );
+                       $wgUser->saveSettings();
+
+                       return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
+               }
+               
+               return false;
+       }
 
        /**
         * action=protect handler
@@ -1590,14 +1671,14 @@ class Article {
                $form = new ProtectionForm( $this );
                $form->show();
        }
-       
+
        /**
         * action=unprotect handler (alias)
         */
        function unprotect() {
                $this->protect();
        }
-       
+
        /**
         * Update the article's restriction field, and leave a log entry.
         *
@@ -1606,50 +1687,66 @@ class Article {
         * @return bool true on success
         */
        function updateRestrictions( $limit = array(), $reason = '' ) {
-               global $wgUser, $wgOut, $wgRequest;
-
-               if ( !$wgUser->isAllowed( 'protect' ) ) {
-                       return false;
-               }
-
-               if( wfReadOnly() ) {
-                       return false;
-               }
-
+               global $wgUser, $wgRestrictionTypes, $wgContLang;
+               
                $id = $this->mTitle->getArticleID();
-               if ( 0 == $id ) {
+               if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
                        return false;
                }
 
-               $flat = Article::flattenRestrictions( $limit );
-               $protecting = ($flat != '');
-               
-               if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser,
-                       $limit, $reason ) ) ) {
-
-                       $dbw =& wfGetDB( DB_MASTER );
-                       $dbw->update( 'page',
-                               array( /* SET */
-                                       'page_touched' => $dbw->timestamp(),
-                                       'page_restrictions' => $flat
-                               ), array( /* WHERE */
-                                       'page_id' => $id
-                               ), 'Article::protect'
-                       );
+               # 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 ) );
 
-                       wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser,
-                               $limit, $reason ) );
+               $current = Article::flattenRestrictions( $current );
+               $updated = Article::flattenRestrictions( $limit );
+               
+               $changed = ( $current != $updated );
+               $protect = ( $updated != '' );
+               
+               # If nothing's changed, do nothing
+               if( $changed ) {
+                       if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
 
-                       $log = new LogPage( 'protect' );
-                       if( $protecting ) {
-                               $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$flat]" ) );
-                       } else {
-                               $log->addEntry( 'unprotect', $this->mTitle, $reason );
-                       }
-               }
+                               $dbw =& wfGetDB( DB_MASTER );
+                               
+                               # Prepare a null revision to be added to the history
+                               $comment = $wgContLang->ucfirst( wfMsgForContent( $protect ? 'protectedarticle' : 'unprotectedarticle', $this->mTitle->getPrefixedText() ) );
+                               if( $reason )
+                                       $comment .= ": $reason";
+                               if( $protect )
+                                       $comment .= " [$updated]";
+                               $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
+                               $nullRevId = $nullRevision->insertOn( $dbw );
+                       
+                               # Update page record
+                               $dbw->update( 'page',
+                                       array( /* SET */
+                                               'page_touched' => $dbw->timestamp(),
+                                               'page_restrictions' => $updated,
+                                               'page_latest' => $nullRevId
+                                       ), array( /* WHERE */
+                                               'page_id' => $id
+                                       ), 'Article::protect'
+                               );
+                               wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
+       
+                               # Update the protection log
+                               $log = new LogPage( 'protect' );
+                               if( $protect ) {
+                                       $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$updated]" ) );
+                               } else {
+                                       $log->addEntry( 'unprotect', $this->mTitle, $reason );
+                               }
+                               
+                       } # End hook
+               } # End "changed" check
+               
                return true;
        }
-       
+
        /**
         * Take an array of page restrictions and flatten it to a string
         * suitable for insertion into the page_restrictions field.
@@ -1662,6 +1759,7 @@ class Article {
                        wfDebugDieBacktrace( 'Article::flattenRestrictions given non-array restriction set' );
                }
                $bits = array();
+               ksort( $limit );
                foreach( $limit as $action => $restrictions ) {
                        if( $restrictions != '' ) {
                                $bits[] = "$action=$restrictions";
@@ -1683,18 +1781,28 @@ class Article {
                # This code desperately needs to be totally rewritten
 
                # Check permissions
-               if( ( !$wgUser->isAllowed( 'delete' ) ) ) {
-                       $wgOut->sysopRequired();
+               if( $wgUser->isAllowed( 'delete' ) ) {
+                       if( $wgUser->isBlocked() ) {
+                               $wgOut->blockedPage();
+                               return;
+                       }
+               } else {
+                       $wgOut->permissionRequired( 'delete' );
                        return;
                }
+
                if( wfReadOnly() ) {
                        $wgOut->readOnlyPage();
                        return;
                }
 
-               # Better double-check that it hasn't been deleted yet!
                $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
-               if( !$this->mTitle->exists() ) {
+               
+               # 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, $fname );
+               if ( $latest === false ) {
                        $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
                        return;
                }
@@ -1706,38 +1814,29 @@ class Article {
 
                # determine whether this page has earlier revisions
                # and insert a warning if it does
-               # we select the text because it might be useful below
-               $dbr =& $this->getDB();
-               $ns = $this->mTitle->getNamespace();
-               $title = $this->mTitle->getDBkey();
-               $revisions = $dbr->select( array( 'page', 'revision' ),
-                       array( 'rev_id', 'rev_user_text' ),
-                       array(
-                               'page_namespace' => $ns,
-                               'page_title' => $title,
-                               'rev_page = page_id'
-                       ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
-               );
-
-               if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
+               $maxRevisions = 20;
+               $authors = $this->getLastNAuthors( $maxRevisions, $latest );
+               
+               if( count( $authors ) > 1 && !$confirm ) {
                        $skin=$wgUser->getSkin();
-                       $wgOut->addHTML('<b>'.wfMsg('historywarning'));
-                       $wgOut->addHTML( $skin->historyLink() .'</b>');
+                       $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
                }
 
-               # Fetch article text
-               $rev = Revision::newFromTitle( $this->mTitle );
-
-               # Fetch name(s) of contributors
-               $rev_name = '';
-               $all_same_user = true;
-               while( $row = $dbr->fetchObject( $revisions ) ) {
-                       if( $rev_name != '' && $rev_name != $row->rev_user_text ) {
-                               $all_same_user = false;
-                       } else {
-                               $rev_name = $row->rev_user_text;
+               # 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;
+                               }
                        }
                }
+               # 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
@@ -1771,10 +1870,10 @@ class Article {
                                $text = preg_replace( "/[\n\r]/", '', $text );
 
                                if( !$blanked ) {
-                                       if( !$all_same_user ) {
+                                       if( $authorOfAll === false ) {
                                                $reason = wfMsgForContent( 'excontent', $text );
                                        } else {
-                                               $reason = wfMsgForContent( 'excontentauthor', $text, $rev_name );
+                                               $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
                                        }
                                } else {
                                        $reason = wfMsgForContent( 'exbeforeblank', $text );
@@ -1785,6 +1884,53 @@ class Article {
                return $this->confirmDelete( '', $reason );
        }
 
+       /**
+        * 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)
+        * @return array Array of authors, duplicates not removed
+        */
+       function getLastNAuthors( $num, $revLatest = 0 ) {
+               $fname = 'Article::getLastNAuthors';
+               wfProfileIn( $fname );
+
+               // First try the slave
+               // If that doesn't have the latest revision, try the master
+               $continue = 2;
+               $db =& wfGetDB( DB_SLAVE );
+               do {
+                       $res = $db->select( array( 'page', 'revision' ),
+                               array( 'rev_id', 'rev_user_text' ),
+                               array(
+                                       'page_namespace' => $this->mTitle->getNamespace(),
+                                       'page_title' => $this->mTitle->getDBkey(),
+                                       'rev_page = page_id'
+                               ), $fname, $this->getSelectOptions( array(
+                                       'ORDER BY' => 'rev_timestamp DESC',
+                                       'LIMIT' => $num
+                               ) )
+                       );
+                       if ( !$res ) {
+                               wfProfileOut( $fname );
+                               return array();
+                       }
+                       $row = $db->fetchObject( $res );
+                       if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
+                               $db =& wfGetDB( DB_MASTER );
+                               $continue--;
+                       } else {
+                               $continue = 0;
+                       }
+               } while ( $continue );
+
+               $authors = array( $row->rev_user_text );
+               while ( $row = $db->fetchObject( $res ) ) {
+                       $authors[] = $row->rev_user_text;
+               }
+               wfProfileOut( $fname );
+               return $authors;
+       }
+       
        /**
         * Output deletion confirmation dialog
         */
@@ -1833,7 +1979,7 @@ class Article {
         * Perform a deletion and output success or failure messages
         */
        function doDelete( $reason ) {
-               global $wgOut, $wgUser, $wgContLang;
+               global $wgOut, $wgUser;
                $fname = 'Article::doDelete';
                wfDebug( $fname."\n" );
 
@@ -1862,7 +2008,7 @@ class Article {
         * Returns success
         */
        function doDeleteArticle( $reason ) {
-               global $wgUser, $wgUseSquid, $wgDeferredUpdateList;
+               global $wgUseSquid, $wgDeferredUpdateList;
                global $wgPostCommitUpdateList, $wgUseTrackbacks;
 
                $fname = 'Article::doDeleteArticle';
@@ -1877,7 +2023,7 @@ class Article {
                        return false;
                }
 
-               $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ), -1 );
+               $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
                array_push( $wgDeferredUpdateList, $u );
 
                $linksTo = $this->mTitle->getLinksTo();
@@ -1944,6 +2090,8 @@ class Article {
                $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
                $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
                $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
+               $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
+               $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
 
                # Log the deletion
                $log = new LogPage( 'delete' );
@@ -1962,12 +2110,18 @@ class Article {
                global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
                $fname = 'Article::rollback';
 
-               if ( ! $wgUser->isAllowed('rollback') ) {
-                       $wgOut->sysopRequired();
+               if( $wgUser->isAllowed( 'rollback' ) ) {
+                       if( $wgUser->isBlocked() ) {
+                               $wgOut->blockedPage();
+                               return;
+                       }
+               } else {
+                       $wgOut->permissionRequired( 'rollback' );
                        return;
                }
+
                if ( wfReadOnly() ) {
-                       $wgOut->readOnlyPage( $this->getContent( true ) );
+                       $wgOut->readOnlyPage( $this->getContent() );
                        return;
                }
                if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
@@ -2072,7 +2226,7 @@ class Article {
 
        /**
         * Do standard deferred updates after page view
-        * @private
+        * @access private
         */
        function viewUpdates() {
                global $wgDeferredUpdateList;
@@ -2094,21 +2248,23 @@ class Article {
        /**
         * Do standard deferred updates after page edit.
         * Every 1000th edit, prune the recent changes table.
-        * @private
+        * @access private
         * @param string $text
         */
        function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid) {
-               global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser, $wgParserCache;
+               global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
 
                $fname = 'Article::editUpdates';
                wfProfileIn( $fname );
-               
+
                # Parse the text
                $options = new ParserOptions;
+               $options->setTidy(true);
                $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
 
                # Save it to the parser cache
-               $wgParserCache->save( $poutput, $this, $wgUser );
+               $parserCache =& ParserCache::singleton();
+               $parserCache->save( $poutput, $this, $wgUser );
 
                # Update the links tables
                $u = new LinksUpdate( $this->mTitle, $poutput );
@@ -2119,7 +2275,7 @@ class Article {
                        if ( 0 == mt_rand( 0, 999 ) ) {
                                # Periodically flush old entries from the recentchanges table.
                                global $wgRCMaxAge;
-                               
+
                                $dbw =& wfGetDB( DB_MASTER );
                                $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
                                $recentchanges = $dbw->tableName( 'recentchanges' );
@@ -2145,14 +2301,16 @@ class Article {
                # If this is another user's talk page, update newtalk
 
                if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
-                       $other = User::newFromName( $shortTitle );
-                       if( is_null( $other ) && User::isIP( $shortTitle ) ) {
-                               // An anonymous user
-                               $other = new User();
-                               $other->setName( $shortTitle );
-                       }
-                       if( $other ) {
-                               $other->setNewtalk( true );
+                       if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
+                               $other = User::newFromName( $shortTitle );
+                               if( is_null( $other ) && User::isIP( $shortTitle ) ) {
+                                       // An anonymous user
+                                       $other = new User();
+                                       $other->setName( $shortTitle );
+                               }
+                               if( $other ) {
+                                       $other->setNewtalk( true );
+                               }
                        }
                }
 
@@ -2164,8 +2322,12 @@ class Article {
        }
 
        /**
-        * @todo document this function
-        * @private
+        * Generate the navigation links when browsing through an article revisions
+        * It shows the information as:
+        *   Revision as of <date>; view current revision
+        *   <- Previous version | Next Version ->
+        *
+        * @access private
         * @param string $oldid         Revision ID of this article revision
         */
        function setOldSubtitle( $oldid=0 ) {
@@ -2177,7 +2339,10 @@ class Article {
                $lnk = $current
                        ? wfMsg( 'currentrevisionlink' )
                        : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
-               $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
+               $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
+               $prevlink = $prev
+                       ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
+                       : wfMsg( 'previousrevision' );
                $nextlink = $current
                        ? wfMsg( 'nextrevision' )
                        : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
@@ -2214,7 +2379,6 @@ class Article {
                        $touched = $this->mTouched;
                        $cache = new CacheManager( $this->mTitle );
                        if($cache->isFileCacheGood( $touched )) {
-                               global $wgOut;
                                wfDebug( " tryFileCache() - about to load\n" );
                                $cache->loadFromFileCache();
                                return true;
@@ -2256,11 +2420,7 @@ class Article {
        function checkTouched() {
                $fname = 'Article::checkTouched';
                if( !$this->mDataLoaded ) {
-                       $dbr =& $this->getDB();
-                       $data = $this->pageDataFromId( $dbr, $this->getId() );
-                       if( $data ) {
-                               $this->loadPageData( $data );
-                       }
+                       $this->loadPageData();
                }
                return !$this->mIsRedirect;
        }
@@ -2271,15 +2431,21 @@ class Article {
        function getTouched() {
                # Ensure that page data has been loaded
                if( !$this->mDataLoaded ) {
-                       $dbr =& $this->getDB();
-                       $data = $this->pageDataFromId( $dbr, $this->getId() );
-                       if( $data ) {
-                               $this->loadPageData( $data );
-                       }
+                       $this->loadPageData();
                }
                return $this->mTouched;
        }
 
+       /**
+        * Get the page_latest field
+        */
+       function getLatest() {
+               if ( !$this->mDataLoaded ) {
+                       $this->loadPageData();
+               }
+               return $this->mLatest;
+       }
+
        /**
         * Edit an article without doing all that other stuff
         * The article must already exist; link tables etc
@@ -2394,9 +2560,9 @@ class Article {
 
        function onArticleDelete( $title ) {
                global $wgMessageCache;
-               
+
                $title->touchLinks();
-               
+
                if( $title->getNamespace() == NS_MEDIAWIKI) {
                        $wgMessageCache->replace( $title->getDBkey(), false );
                }
@@ -2407,9 +2573,9 @@ class Article {
         */
        function onArticleEdit( $title ) {
                global $wgUseSquid, $wgPostCommitUpdateList, $wgUseFileCache;
-               
+
                $urls = array();
-               
+
                // Template namespace? Purge all articles linking here.
                // FIXME: When a templatelinks table arrives, use it for all includes.
                if ( $title->getNamespace() == NS_TEMPLATE) {
@@ -2467,7 +2633,7 @@ class Article {
                                $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
                        }
                } else {
-                       $dbr =& $this->getDB( DB_SLAVE );
+                       $dbr =& wfGetDB( DB_SLAVE );
                        $wl_clause = array(
                                'wl_title'     => $page->getDBkey(),
                                'wl_namespace' => $page->getNamespace() );
@@ -2509,7 +2675,7 @@ class Article {
                        return false;
                }
 
-               $dbr =& $this->getDB( DB_SLAVE );
+               $dbr =& wfGetDB( DB_SLAVE );
 
                $rev_clause = array( 'rev_page' => $id );
                $fname = 'Article::pageCountInfo';
@@ -2540,6 +2706,9 @@ class Article {
        function getUsedTemplates() {
                $result = array();
                $id = $this->mTitle->getArticleID();
+               if( $id == 0 ) {
+                       return array();
+               }
 
                $dbr =& wfGetDB( DB_SLAVE );
                $res = $dbr->select( array( 'templatelinks' ),