Update Postgres with missing uploadstash tables
[lhc/web/wiklou.git] / includes / Revision.php
index 8d2c7e9..ec0508c 100644 (file)
@@ -4,6 +4,22 @@
  * @todo document
  */
 class Revision {
+       protected $mId;
+       protected $mPage;
+       protected $mUserText;
+       protected $mOrigUserText;
+       protected $mUser;
+       protected $mMinorEdit;
+       protected $mTimestamp;
+       protected $mDeleted;
+       protected $mSize;
+       protected $mParentId;
+       protected $mComment;
+       protected $mText;
+       protected $mTextRow;
+       protected $mTitle;
+       protected $mCurrent;
+
        const DELETED_TEXT = 1;
        const DELETED_COMMENT = 2;
        const DELETED_USER = 4;
@@ -23,9 +39,7 @@ class Revision {
         * @return Revision or null
         */
        public static function newFromId( $id ) {
-               return Revision::newFromConds(
-                       array( 'page_id=rev_page',
-                              'rev_id' => intval( $id ) ) );
+               return Revision::newFromConds( array( 'rev_id' => intval( $id ) ) );
        }
 
        /**
@@ -34,13 +48,13 @@ class Revision {
         * to that title, will return null.
         *
         * @param $title Title
-        * @param $id Integer
+        * @param $id Integer (optional)
         * @return Revision or null
         */
        public static function newFromTitle( $title, $id = 0 ) {
-               $conds = array( 
-                       'page_namespace' => $title->getNamespace(), 
-                       'page_title' => $title->getDBkey()
+               $conds = array(
+                       'page_namespace' => $title->getNamespace(),
+                       'page_title'     => $title->getDBkey()
                );
                if ( $id ) {
                        // Use the specified ID
@@ -50,26 +64,56 @@ class Revision {
                        $dbw = wfGetDB( DB_MASTER );
                        $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
                        if ( $latest === false ) {
-                               // Page does not exist
-                               return null;
+                               return null; // page does not exist
                        }
                        $conds['rev_id'] = $latest;
                } else {
                        // Use a join to get the latest revision
                        $conds[] = 'rev_id=page_latest';
                }
-               $conds[] = 'page_id=rev_page';
+               return Revision::newFromConds( $conds );
+       }
+
+       /**
+        * Load either the current, or a specified, revision
+        * that's attached to a given page ID.
+        * Returns null if no such revision can be found.
+        *
+        * @param $revId Integer
+        * @param $pageId Integer (optional)
+        * @return Revision or null
+        */
+       public static function newFromPageId( $pageId, $revId = 0 ) {
+               $conds = array( 'page_id' => $pageId );
+               if ( $revId ) {
+                       $conds['rev_id'] = $revId;
+               } elseif ( wfGetLB()->getServerCount() > 1 ) {
+                       // Get the latest revision ID from the master
+                       $dbw = wfGetDB( DB_MASTER );
+                       $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
+                       if ( $latest === false ) {
+                               return null; // page does not exist
+                       }
+                       $conds['rev_id'] = $latest;
+               } else {
+                       $conds[] = 'rev_id = page_latest';
+               }
                return Revision::newFromConds( $conds );
        }
 
        /**
         * Make a fake revision object from an archive table row. This is queried
         * for permissions or even inserted (as in Special:Undelete)
-        * @todo Fixme: should be a subclass for RevisionDelete. [TS]
+        * @todo FIXME: Should be a subclass for RevisionDelete. [TS]
+        *
+        * @param $row
+        * @param $overrides array
+        *
+        * @return Revision
         */
        public static function newFromArchiveRow( $row, $overrides = array() ) {
                $attribs = $overrides + array(
-                       'page'       => isset( $row->page_id ) ? $row->page_id : null,
+                       'page'       => isset( $row->ar_page_id ) ? $row->ar_page_id : null,
                        'id'         => isset( $row->ar_rev_id ) ? $row->ar_rev_id : null,
                        'comment'    => $row->ar_comment,
                        'user'       => $row->ar_user,
@@ -78,14 +122,28 @@ class Revision {
                        'minor_edit' => $row->ar_minor_edit,
                        'text_id'    => isset( $row->ar_text_id ) ? $row->ar_text_id : null,
                        'deleted'    => $row->ar_deleted,
-                       'len'        => $row->ar_len);
+                       'len'        => $row->ar_len
+               );
                if ( isset( $row->ar_text ) && !$row->ar_text_id ) {
                        // Pre-1.5 ar_text row
                        $attribs['text'] = self::getRevisionText( $row, 'ar_' );
+                       if ( $attribs['text'] === false ) {
+                               throw new MWException( 'Unable to load text from archive row (possibly bug 22624)' );
+                       }
                }
                return new self( $attribs );
        }
 
+       /**
+        * @since 1.19
+        *
+        * @param $row
+        * @return Revision
+        */
+       public static function newFromRow( $row ) {
+               return new self( $row );
+       }
+
        /**
         * Load a page revision from a given revision ID number.
         * Returns null if no such revision can be found.
@@ -95,9 +153,7 @@ class Revision {
         * @return Revision or null
         */
        public static function loadFromId( $db, $id ) {
-               return Revision::loadFromConds( $db,
-                       array( 'page_id=rev_page',
-                              'rev_id' => intval( $id ) ) );
+               return Revision::loadFromConds( $db, array( 'rev_id' => intval( $id ) ) );
        }
 
        /**
@@ -111,7 +167,7 @@ class Revision {
         * @return Revision or null
         */
        public static function loadFromPageId( $db, $pageid, $id = 0 ) {
-               $conds = array( 'page_id=rev_page','rev_page' => intval( $pageid ), 'page_id'=>intval( $pageid ) );
+               $conds = array( 'rev_page' => intval( $pageid ), 'page_id'  => intval( $pageid ) );
                if( $id ) {
                        $conds['rev_id'] = intval( $id );
                } else {
@@ -136,12 +192,11 @@ class Revision {
                } else {
                        $matchId = 'page_latest';
                }
-               return Revision::loadFromConds(
-                       $db,
+               return Revision::loadFromConds( $db,
                        array( "rev_id=$matchId",
-                              'page_id=rev_page',
-                              'page_namespace' => $title->getNamespace(),
-                              'page_title'     => $title->getDBkey() ) );
+                                  'page_namespace' => $title->getNamespace(),
+                                  'page_title'     => $title->getDBkey() )
+               );
        }
 
        /**
@@ -149,18 +204,17 @@ class Revision {
         * WARNING: Timestamps may in some circumstances not be unique,
         * so this isn't the best key to use.
         *
-        * @param $db Database
+        * @param $db DatabaseBase
         * @param $title Title
         * @param $timestamp String
         * @return Revision or null
         */
        public static function loadFromTimestamp( $db, $title, $timestamp ) {
-               return Revision::loadFromConds(
-                       $db,
+               return Revision::loadFromConds( $db,
                        array( 'rev_timestamp'  => $db->timestamp( $timestamp ),
-                              'page_id=rev_page',
-                              'page_namespace' => $title->getNamespace(),
-                              'page_title'     => $title->getDBkey() ) );
+                                  'page_namespace' => $title->getNamespace(),
+                                  'page_title'     => $title->getDBkey() )
+               );
        }
 
        /**
@@ -171,19 +225,19 @@ class Revision {
         */
        public static function newFromConds( $conditions ) {
                $db = wfGetDB( DB_SLAVE );
-               $row = Revision::loadFromConds( $db, $conditions );
-               if( is_null( $row ) && wfGetLB()->getServerCount() > 1 ) {
+               $rev = Revision::loadFromConds( $db, $conditions );
+               if( is_null( $rev ) && wfGetLB()->getServerCount() > 1 ) {
                        $dbw = wfGetDB( DB_MASTER );
-                       $row = Revision::loadFromConds( $dbw, $conditions );
+                       $rev = Revision::loadFromConds( $dbw, $conditions );
                }
-               return $row;
+               return $rev;
        }
 
        /**
         * Given a set of conditions, fetch a revision from
         * the given database connection.
         *
-        * @param $db Database
+        * @param $db DatabaseBase
         * @param $conditions Array
         * @return Revision or null
         */
@@ -191,7 +245,6 @@ class Revision {
                $res = Revision::fetchFromConds( $db, $conditions );
                if( $res ) {
                        $row = $res->fetchObject();
-                       $res->free();
                        if( $row ) {
                                $ret = new Revision( $row );
                                return $ret;
@@ -213,9 +266,9 @@ class Revision {
                return Revision::fetchFromConds(
                        wfGetDB( DB_SLAVE ),
                        array( 'rev_id=page_latest',
-                              'page_namespace' => $title->getNamespace(),
-                              'page_title'     => $title->getDBkey(),
-                              'page_id=rev_page' ) );
+                                  'page_namespace' => $title->getNamespace(),
+                                  'page_title'     => $title->getDBkey() )
+               );
        }
 
        /**
@@ -223,37 +276,39 @@ class Revision {
         * which will return matching database rows with the
         * fields necessary to build Revision objects.
         *
-        * @param $db Database
+        * @param $db DatabaseBase
         * @param $conditions Array
         * @return ResultWrapper
         */
        private static function fetchFromConds( $db, $conditions ) {
-               $fields = self::selectFields();
-               $fields[] = 'page_namespace';
-               $fields[] = 'page_title';
-               $fields[] = 'page_latest';
-               $res = $db->select(
-                       array( 'page', 'revision' ),
+               $fields = array_merge(
+                       self::selectFields(),
+                       self::selectPageFields(),
+                       self::selectUserFields()
+               );
+               return $db->select(
+                       array( 'revision', 'page', 'user' ),
                        $fields,
                        $conditions,
                        __METHOD__,
-                       array( 'LIMIT' => 1 ) );
-               $ret = $db->resultObject( $res );
-               return $ret;
+                       array( 'LIMIT' => 1 ),
+                       array( 'page' => array( 'INNER JOIN', 'page_id = rev_page' ),
+                               'user' => array( 'LEFT JOIN', 'rev_user != 0 AND user_id = rev_user' ) )
+               );
        }
 
        /**
         * Return the list of revision fields that should be selected to create
         * a new revision.
         */
-       static function selectFields() {
+       public static function selectFields() {
                return array(
                        'rev_id',
                        'rev_page',
                        'rev_text_id',
                        'rev_timestamp',
                        'rev_comment',
-                       'rev_user_text,'.
+                       'rev_user_text',
                        'rev_user',
                        'rev_minor_edit',
                        'rev_deleted',
@@ -261,12 +316,12 @@ class Revision {
                        'rev_parent_id'
                );
        }
-       
+
        /**
-        * Return the list of text fields that should be selected to read the 
+        * Return the list of text fields that should be selected to read the
         * revision text
         */
-       static function selectTextFields() {
+       public static function selectTextFields() {
                return array(
                        'old_text',
                        'old_flags'
@@ -276,7 +331,7 @@ class Revision {
        /**
         * Return the list of page fields that should be selected from page table
         */
-       static function selectPageFields() {
+       public static function selectPageFields() {
                return array(
                        'page_namespace',
                        'page_title',
@@ -284,38 +339,45 @@ class Revision {
                );
        }
 
+       /**
+        * Return the list of user fields that should be selected from user table
+        */
+       public static function selectUserFields() {
+               return array( 'user_name' );
+       }
+
        /**
         * Constructor
         *
         * @param $row Mixed: either a database row or an array
         * @access private
         */
-       function Revision( $row ) {
+       function __construct( $row ) {
                if( is_object( $row ) ) {
                        $this->mId        = intval( $row->rev_id );
                        $this->mPage      = intval( $row->rev_page );
                        $this->mTextId    = intval( $row->rev_text_id );
                        $this->mComment   =         $row->rev_comment;
-                       $this->mUserText  =         $row->rev_user_text;
                        $this->mUser      = intval( $row->rev_user );
                        $this->mMinorEdit = intval( $row->rev_minor_edit );
                        $this->mTimestamp =         $row->rev_timestamp;
                        $this->mDeleted   = intval( $row->rev_deleted );
 
-                       if( !isset( $row->rev_parent_id ) )
-                               $this->mParentId = is_null($row->rev_parent_id) ? null : 0;
-                       else
+                       if( !isset( $row->rev_parent_id ) ) {
+                               $this->mParentId = is_null( $row->rev_parent_id ) ? null : 0;
+                       } else {
                                $this->mParentId  = intval( $row->rev_parent_id );
+                       }
 
-                       if( !isset( $row->rev_len ) || is_null( $row->rev_len ) )
+                       if( !isset( $row->rev_len ) || is_null( $row->rev_len ) ) {
                                $this->mSize = null;
-                       else
+                       } else {
                                $this->mSize = intval( $row->rev_len );
+                       }
 
                        if( isset( $row->page_latest ) ) {
                                $this->mCurrent = ( $row->rev_id == $row->page_latest );
-                               $this->mTitle = Title::makeTitle( $row->page_namespace, $row->page_title );
-                               $this->mTitle->resetArticleID( $this->mPage );
+                               $this->mTitle = Title::newFromRow( $row );
                        } else {
                                $this->mCurrent = false;
                                $this->mTitle = null;
@@ -329,6 +391,15 @@ class Revision {
                                // 'text' table row entry will be lazy-loaded
                                $this->mTextRow = null;
                        }
+
+                       // Use user_name for users and rev_user_text for IPs...
+                       $this->mUserText = null; // lazy load if left null
+                       if ( $this->mUser == 0 ) {
+                               $this->mUserText = $row->rev_user_text; // IP user
+                       } elseif ( isset( $row->user_name ) ) {
+                               $this->mUserText = $row->user_name; // logged-in user
+                       }
+                       $this->mOrigUserText = $row->rev_user_text;
                } elseif( is_array( $row ) ) {
                        // Build a new revision to be saved...
                        global $wgUser;
@@ -352,8 +423,9 @@ class Revision {
                        $this->mTitle     = null; # Load on demand if needed
                        $this->mCurrent   = false;
                        # If we still have no len_size, see it we have the text to figure it out
-                       if ( !$this->mSize )
+                       if ( !$this->mSize ) {
                                $this->mSize      = is_null( $this->mText ) ? null : strlen( $this->mText );
+                       }
                } else {
                        throw new MWException( 'Revision constructor passed invalid row format.' );
                }
@@ -410,11 +482,10 @@ class Revision {
                        array( 'page', 'revision' ),
                        array( 'page_namespace', 'page_title' ),
                        array( 'page_id=rev_page',
-                              'rev_id' => $this->mId ),
+                                  'rev_id' => $this->mId ),
                        'Revision::getTitle' );
                if( $row ) {
-                       $this->mTitle = Title::makeTitle( $row->page_namespace,
-                                                         $row->page_title );
+                       $this->mTitle = Title::makeTitle( $row->page_namespace, $row->page_title );
                }
                return $this->mTitle;
        }
@@ -439,21 +510,21 @@ class Revision {
 
        /**
         * Fetch revision's user id if it's available to the specified audience.
-        * If the specified audience does not have access to it, zero will be 
+        * If the specified audience does not have access to it, zero will be
         * returned.
         *
         * @param $audience Integer: one of:
         *      Revision::FOR_PUBLIC       to be displayed to all users
         *      Revision::FOR_THIS_USER    to be displayed to $wgUser
         *      Revision::RAW              get the ID regardless of permissions
-        *
-        *
+        * @param $user User object to check for, only if FOR_THIS_USER is passed
+        *              to the $audience parameter
         * @return Integer
         */
-       public function getUser( $audience = self::FOR_PUBLIC ) {
+       public function getUser( $audience = self::FOR_PUBLIC, User $user = null ) {
                if( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_USER ) ) {
                        return 0;
-               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_USER ) ) {
+               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_USER, $user ) ) {
                        return 0;
                } else {
                        return $this->mUser;
@@ -471,23 +542,24 @@ class Revision {
 
        /**
         * Fetch revision's username if it's available to the specified audience.
-        * If the specified audience does not have access to the username, an 
+        * If the specified audience does not have access to the username, an
         * empty string will be returned.
         *
         * @param $audience Integer: one of:
         *      Revision::FOR_PUBLIC       to be displayed to all users
         *      Revision::FOR_THIS_USER    to be displayed to $wgUser
         *      Revision::RAW              get the text regardless of permissions
-        *
+        * @param $user User object to check for, only if FOR_THIS_USER is passed
+        *              to the $audience parameter
         * @return string
         */
-       public function getUserText( $audience = self::FOR_PUBLIC ) {
+       public function getUserText( $audience = self::FOR_PUBLIC, User $user = null ) {
                if( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_USER ) ) {
                        return '';
-               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_USER ) ) {
+               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_USER, $user ) ) {
                        return '';
                } else {
-                       return $this->mUserText;
+                       return $this->getRawUserText();
                }
        }
 
@@ -497,25 +569,34 @@ class Revision {
         * @return String
         */
        public function getRawUserText() {
+               if ( $this->mUserText === null ) {
+                       $this->mUserText = User::whoIs( $this->mUser ); // load on demand
+                       if ( $this->mUserText === false ) {
+                               # This shouldn't happen, but it can if the wiki was recovered
+                               # via importing revs and there is no user table entry yet.
+                               $this->mUserText = $this->mOrigUserText;
+                       }
+               }
                return $this->mUserText;
        }
 
        /**
         * Fetch revision comment if it's available to the specified audience.
-        * If the specified audience does not have access to the comment, an 
+        * If the specified audience does not have access to the comment, an
         * empty string will be returned.
         *
         * @param $audience Integer: one of:
         *      Revision::FOR_PUBLIC       to be displayed to all users
         *      Revision::FOR_THIS_USER    to be displayed to $wgUser
         *      Revision::RAW              get the text regardless of permissions
-        *
+        * @param $user User object to check for, only if FOR_THIS_USER is passed
+        *              to the $audience parameter
         * @return String
         */
-       function getComment( $audience = self::FOR_PUBLIC ) {
+       function getComment( $audience = self::FOR_PUBLIC, User $user = null ) {
                if( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_COMMENT ) ) {
                        return '';
-               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_COMMENT ) ) {
+               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_COMMENT, $user ) ) {
                        return '';
                } else {
                        return $this->mComment;
@@ -537,7 +618,7 @@ class Revision {
        public function isMinor() {
                return (bool)$this->mMinorEdit;
        }
-       
+
        /**
         * @return Integer rcid of the unpatrolled row, zero if there isn't one
         */
@@ -560,7 +641,7 @@ class Revision {
        }
 
        /**
-        * int $field one of DELETED_* bitfield constants
+        * @param $field int one of DELETED_* bitfield constants
         *
         * @return Boolean
         */
@@ -570,6 +651,8 @@ class Revision {
 
        /**
         * Get the deletion bitfield of the revision
+        *
+        * @return int
         */
        public function getVisibility() {
                return (int)$this->mDeleted;
@@ -577,21 +660,21 @@ class Revision {
 
        /**
         * Fetch revision text if it's available to the specified audience.
-        * If the specified audience does not have the ability to view this 
+        * If the specified audience does not have the ability to view this
         * revision, an empty string will be returned.
         *
         * @param $audience Integer: one of:
         *      Revision::FOR_PUBLIC       to be displayed to all users
         *      Revision::FOR_THIS_USER    to be displayed to $wgUser
         *      Revision::RAW              get the text regardless of permissions
-        *
-        *
+        * @param $user User object to check for, only if FOR_THIS_USER is passed
+        *              to the $audience parameter
         * @return String
         */
-       public function getText( $audience = self::FOR_PUBLIC ) {
+       public function getText( $audience = self::FOR_PUBLIC, User $user = null ) {
                if( $audience == self::FOR_PUBLIC && $this->isDeleted( self::DELETED_TEXT ) ) {
                        return '';
-               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_TEXT ) ) {
+               } elseif( $audience == self::FOR_THIS_USER && !$this->userCan( self::DELETED_TEXT, $user ) ) {
                        return '';
                } else {
                        return $this->getRawText();
@@ -601,9 +684,11 @@ class Revision {
        /**
         * Alias for getText(Revision::FOR_THIS_USER)
         *
+        * @deprecated since 1.17
         * @return String
         */
        public function revText() {
+               wfDeprecated( __METHOD__ );
                return $this->getText( self::FOR_THIS_USER );
        }
 
@@ -721,8 +806,8 @@ class Revision {
                # Use external methods for external objects, text in table is URL-only then
                if ( in_array( 'external', $flags ) ) {
                        $url = $text;
-                       @list(/* $proto */, $path ) = explode( '://', $url, 2 );
-                       if( $path == '' ) {
+                       $parts = explode( '://', $url, 2 );
+                       if( count( $parts ) == 1 || $parts[1] == '' ) {
                                wfProfileOut( __METHOD__ );
                                return false;
                        }
@@ -750,15 +835,15 @@ class Revision {
                        }
 
                        global $wgLegacyEncoding;
-                       if( $text !== false && $wgLegacyEncoding 
-                               && !in_array( 'utf-8', $flags ) && !in_array( 'utf8', $flags ) ) 
+                       if( $text !== false && $wgLegacyEncoding
+                               && !in_array( 'utf-8', $flags ) && !in_array( 'utf8', $flags ) )
                        {
                                # Old revisions kept around in a legacy encoding?
                                # Upconvert on demand.
                                # ("utf8" checked for compatibility with some broken
                                #  conversion scripts 2008-12-30)
-                               global $wgInputEncoding, $wgContLang;
-                               $text = $wgContLang->iconv( $wgLegacyEncoding, $wgInputEncoding, $text );
+                               global $wgContLang;
+                               $text = $wgContLang->iconv( $wgLegacyEncoding, 'UTF-8', $text );
                        }
                }
                wfProfileOut( __METHOD__ );
@@ -798,7 +883,7 @@ class Revision {
         * Insert a new revision into the database, returning the new revision ID
         * number on success and dies horribly on failure.
         *
-        * @param $dbw DatabaseBase (master connection)
+        * @param $dbw DatabaseBase: (master connection)
         * @return Integer
         */
        public function insertOn( $dbw ) {
@@ -938,7 +1023,7 @@ class Revision {
         * @param $pageId Integer: ID number of the page to read from
         * @param $summary String: revision's summary
         * @param $minor Boolean: whether the revision should be considered as minor
-        * @return Mixed: Revision, or null on error
+        * @return Revision|null on error
         */
        public static function newNullRevision( $dbw, $pageId, $summary, $minor ) {
                wfProfileIn( __METHOD__ );
@@ -976,10 +1061,11 @@ class Revision {
         * @param $field Integer:one of self::DELETED_TEXT,
         *                              self::DELETED_COMMENT,
         *                              self::DELETED_USER
+        * @param $user User object to check, or null to use $wgUser
         * @return Boolean
         */
-       public function userCan( $field ) {
-               return self::userCanBitfield( $this->mDeleted, $field );
+       public function userCan( $field, User $user = null ) {
+               return self::userCanBitfield( $this->mDeleted, $field, $user );
        }
 
        /**
@@ -991,12 +1077,11 @@ class Revision {
         * @param $field Integer: one of self::DELETED_TEXT = File::DELETED_FILE,
         *                               self::DELETED_COMMENT = File::DELETED_COMMENT,
         *                               self::DELETED_USER = File::DELETED_USER
+        * @param $user User object to check, or null to use $wgUser
         * @return Boolean
         */
-       public static function userCanBitfield( $bitfield, $field ) {
+       public static function userCanBitfield( $bitfield, $field, User $user = null ) {
                if( $bitfield & $field ) { // aspect is deleted
-                       global $wgUser;
-                       $permission = '';
                        if ( $bitfield & self::DELETED_RESTRICTED ) {
                                $permission = 'suppressrevision';
                        } elseif ( $field & self::DELETED_TEXT ) {
@@ -1005,7 +1090,11 @@ class Revision {
                                $permission = 'deletedhistory';
                        }
                        wfDebug( "Checking for $permission due to $field match on $bitfield\n" );
-                       return $wgUser->isAllowed( $permission );
+                       if ( $user === null ) {
+                               global $wgUser;
+                               $user = $wgUser;
+                       }
+                       return $user->isAllowed( $permission );
                } else {
                        return true;
                }
@@ -1066,11 +1155,3 @@ class Revision {
                return 0;
        }
 }
-
-/**
- * Aliases for backwards compatibility with 1.6
- */
-define( 'MW_REV_DELETED_TEXT', Revision::DELETED_TEXT );
-define( 'MW_REV_DELETED_COMMENT', Revision::DELETED_COMMENT );
-define( 'MW_REV_DELETED_USER', Revision::DELETED_USER );
-define( 'MW_REV_DELETED_RESTRICTED', Revision::DELETED_RESTRICTED );