User.php

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<?php
define( 'USER_TOKEN_LENGTH', 32 );

define( 'MW_USER_VERSION', 8 );

define( 'EDIT_TOKEN_SUFFIX', '+\\' );

class PasswordError extends MWException {
        // NOP
}

class User {
        const USER_TOKEN_LENGTH = USER_TOKEN_LENGTH;
        const MW_USER_VERSION = MW_USER_VERSION;
        const EDIT_TOKEN_SUFFIX = EDIT_TOKEN_SUFFIX;

        static $mCacheVars = array(
                // user table
                'mId',
                'mName',
                'mRealName',
                'mPassword',
                'mNewpassword',
                'mNewpassTime',
                'mEmail',
                'mTouched',
                'mToken',
                'mEmailAuthenticated',
                'mEmailToken',
                'mEmailTokenExpires',
                'mRegistration',
                'mEditCount',
                // user_groups table
                'mGroups',
                // user_properties table
                'mOptionOverrides',
        );

        static $mCoreRights = array(
                'apihighlimits',
                'autoconfirmed',
                'autopatrol',
                'bigdelete',
                'block',
                'blockemail',
                'bot',
                'browsearchive',
                'createaccount',
                'createpage',
                'createtalk',
                'delete',
                'deletedhistory',
                'deletedtext',
                'deleterevision',
                'edit',
                'editinterface',
                'editusercssjs', #deprecated
                'editusercss',
                'edituserjs',
                'hideuser',
                'import',
                'importupload',
                'ipblock-exempt',
                'markbotedits',
                'mergehistory',
                'minoredit',
                'move',
                'movefile',
                'move-rootuserpages',
                'move-subpages',
                'nominornewtalk',
                'noratelimit',
                'override-export-depth',
                'patrol',
                'protect',
                'proxyunbannable',
                'purge',
                'read',
                'reupload',
                'reupload-shared',
                'rollback',
                'sendemail',
                'siteadmin',
                'suppressionlog',
                'suppressredirect',
                'suppressrevision',
                'unblockself',
                'undelete',
                'unwatchedpages',
                'upload',
                'upload_by_url',
                'userrights',
                'userrights-interwiki',
                'writeapi',
        );
        static $mAllRights = false;

        var $mId, $mName, $mRealName, $mPassword, $mNewpassword, $mNewpassTime,
                $mEmail, $mTouched, $mToken, $mEmailAuthenticated,
                $mEmailToken, $mEmailTokenExpires, $mRegistration, $mGroups, $mOptionOverrides,
                $mCookiePassword, $mEditCount, $mAllowUsertalk;

        var $mOptionsLoaded;

        private $mLoadedItems = array();

        var $mFrom;

        var $mNewtalk, $mDatePreference, $mBlockedby, $mHash, $mRights,
                $mBlockreason, $mEffectiveGroups, $mImplicitGroups, $mFormerGroups, $mBlockedGlobally,
                $mLocked, $mHideName, $mOptions;

        private $mRequest;

        var $mBlock;

        private $mBlockedFromCreateAccount = false;

        static $idCacheByName = array();

        function __construct() {
                $this->clearInstanceCache( 'defaults' );
        }

        function __toString(){
                return $this->getName();
        }

        public function load() {
                if ( $this->mLoadedItems === true ) {
                        return;
                }
                wfProfileIn( __METHOD__ );

                # Set it now to avoid infinite recursion in accessors
                $this->mLoadedItems = true;

                switch ( $this->mFrom ) {
                        case 'defaults':
                                $this->loadDefaults();
                                break;
                        case 'name':
                                $this->mId = self::idFromName( $this->mName );
                                if ( !$this->mId ) {
                                        # Nonexistent user placeholder object
                                        $this->loadDefaults( $this->mName );
                                } else {
                                        $this->loadFromId();
                                }
                                break;
                        case 'id':
                                $this->loadFromId();
                                break;
                        case 'session':
                                $this->loadFromSession();
                                wfRunHooks( 'UserLoadAfterLoadFromSession', array( $this ) );
                                break;
                        default:
                                throw new MWException( "Unrecognised value for User->mFrom: \"{$this->mFrom}\"" );
                }
                wfProfileOut( __METHOD__ );
        }

        public function loadFromId() {
                global $wgMemc;
                if ( $this->mId == 0 ) {
                        $this->loadDefaults();
                        return false;
                }

                # Try cache
                $key = wfMemcKey( 'user', 'id', $this->mId );
                $data = $wgMemc->get( $key );
                if ( !is_array( $data ) || $data['mVersion'] < MW_USER_VERSION ) {
                        # Object is expired, load from DB
                        $data = false;
                }

                if ( !$data ) {
                        wfDebug( "User: cache miss for user {$this->mId}\n" );
                        # Load from DB
                        if ( !$this->loadFromDatabase() ) {
                                # Can't load from ID, user is anonymous
                                return false;
                        }
                        $this->saveToCache();
                } else {
                        wfDebug( "User: got user {$this->mId} from cache\n" );
                        # Restore from cache
                        foreach ( self::$mCacheVars as $name ) {
                                $this->$name = $data[$name];
                        }
                }
                return true;
        }

        public function saveToCache() {
                $this->load();
                $this->loadGroups();
                $this->loadOptions();
                if ( $this->isAnon() ) {
                        // Anonymous users are uncached
                        return;
                }
                $data = array();
                foreach ( self::$mCacheVars as $name ) {
                        $data[$name] = $this->$name;
                }
                $data['mVersion'] = MW_USER_VERSION;
                $key = wfMemcKey( 'user', 'id', $this->mId );
                global $wgMemc;
                $wgMemc->set( $key, $data );
        }


        public static function newFromName( $name, $validate = 'valid' ) {
                if ( $validate === true ) {
                        $validate = 'valid';
                }
                $name = self::getCanonicalName( $name, $validate );
                if ( $name === false ) {
                        return false;
                } else {
                        # Create unloaded user object
                        $u = new User;
                        $u->mName = $name;
                        $u->mFrom = 'name';
                        $u->setItemLoaded( 'name' );
                        return $u;
                }
        }

        public static function newFromId( $id ) {
                $u = new User;
                $u->mId = $id;
                $u->mFrom = 'id';
                $u->setItemLoaded( 'id' );
                return $u;
        }

        public static function newFromConfirmationCode( $code ) {
                $dbr = wfGetDB( DB_SLAVE );
                $id = $dbr->selectField( 'user', 'user_id', array(
                        'user_email_token' => md5( $code ),
                        'user_email_token_expires > ' . $dbr->addQuotes( $dbr->timestamp() ),
                        ) );
                if( $id !== false ) {
                        return User::newFromId( $id );
                } else {
                        return null;
                }
        }

        public static function newFromSession( WebRequest $request = null ) {
                $user = new User;
                $user->mFrom = 'session';
                $user->mRequest = $request;
                return $user;
        }

        public static function newFromRow( $row ) {
                $user = new User;
                $user->loadFromRow( $row );
                return $user;
        }


        public static function whoIs( $id ) {
                $dbr = wfGetDB( DB_SLAVE );
                return $dbr->selectField( 'user', 'user_name', array( 'user_id' => $id ), __METHOD__ );
        }

        public static function whoIsReal( $id ) {
                $dbr = wfGetDB( DB_SLAVE );
                return $dbr->selectField( 'user', 'user_real_name', array( 'user_id' => $id ), __METHOD__ );
        }

        public static function idFromName( $name ) {
                $nt = Title::makeTitleSafe( NS_USER, $name );
                if( is_null( $nt ) ) {
                        # Illegal name
                        return null;
                }

                if ( isset( self::$idCacheByName[$name] ) ) {
                        return self::$idCacheByName[$name];
                }

                $dbr = wfGetDB( DB_SLAVE );
                $s = $dbr->selectRow( 'user', array( 'user_id' ), array( 'user_name' => $nt->getText() ), __METHOD__ );

                if ( $s === false ) {
                        $result = null;
                } else {
                        $result = $s->user_id;
                }

                self::$idCacheByName[$name] = $result;

                if ( count( self::$idCacheByName ) > 1000 ) {
                        self::$idCacheByName = array();
                }

                return $result;
        }

        public static function resetIdByNameCache() {
                self::$idCacheByName = array();
        }

        public static function isIP( $name ) {
                return preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.(?:xxx|\d{1,3})$/',$name) || IP::isIPv6($name);
        }

        public static function isValidUserName( $name ) {
                global $wgContLang, $wgMaxNameChars;

                if ( $name == ''
                || User::isIP( $name )
                || strpos( $name, '/' ) !== false
                || strlen( $name ) > $wgMaxNameChars
                || $name != $wgContLang->ucfirst( $name ) ) {
                        wfDebugLog( 'username', __METHOD__ .
                                ": '$name' invalid due to empty, IP, slash, length, or lowercase" );
                        return false;
                }


                // Ensure that the name can't be misresolved as a different title,
                // such as with extra namespace keys at the start.
                $parsed = Title::newFromText( $name );
                if( is_null( $parsed )
                        || $parsed->getNamespace()
                        || strcmp( $name, $parsed->getPrefixedText() ) ) {
                        wfDebugLog( 'username', __METHOD__ .
                                ": '$name' invalid due to ambiguous prefixes" );
                        return false;
                }

                // Check an additional blacklist of troublemaker characters.
                // Should these be merged into the title char list?
                $unicodeBlacklist = '/[' .
                        '\x{0080}-\x{009f}' . # iso-8859-1 control chars
                        '\x{00a0}' .          # non-breaking space
                        '\x{2000}-\x{200f}' . # various whitespace
                        '\x{2028}-\x{202f}' . # breaks and control chars
                        '\x{3000}' .          # ideographic space
                        '\x{e000}-\x{f8ff}' . # private use
                        ']/u';
                if( preg_match( $unicodeBlacklist, $name ) ) {
                        wfDebugLog( 'username', __METHOD__ .
                                ": '$name' invalid due to blacklisted characters" );
                        return false;
                }

                return true;
        }

        public static function isUsableName( $name ) {
                global $wgReservedUsernames;
                // Must be a valid username, obviously ;)
                if ( !self::isValidUserName( $name ) ) {
                        return false;
                }

                static $reservedUsernames = false;
                if ( !$reservedUsernames ) {
                        $reservedUsernames = $wgReservedUsernames;
                        wfRunHooks( 'UserGetReservedNames', array( &$reservedUsernames ) );
                }

                // Certain names may be reserved for batch processes.
                foreach ( $reservedUsernames as $reserved ) {
                        if ( substr( $reserved, 0, 4 ) == 'msg:' ) {
                                $reserved = wfMsgForContent( substr( $reserved, 4 ) );
                        }
                        if ( $reserved == $name ) {
                                return false;
                        }
                }
                return true;
        }

        public static function isCreatableName( $name ) {
                global $wgInvalidUsernameCharacters;

                // Ensure that the username isn't longer than 235 bytes, so that
                // (at least for the builtin skins) user javascript and css files
                // will work. (bug 23080)
                if( strlen( $name ) > 235 ) {
                        wfDebugLog( 'username', __METHOD__ .
                                ": '$name' invalid due to length" );
                        return false;
                }

                // Preg yells if you try to give it an empty string
                if( $wgInvalidUsernameCharacters !== '' ) {
                        if( preg_match( '/[' . preg_quote( $wgInvalidUsernameCharacters, '/' ) . ']/', $name ) ) {
                                wfDebugLog( 'username', __METHOD__ .
                                        ": '$name' invalid due to wgInvalidUsernameCharacters" );
                                return false;
                        }
                }

                return self::isUsableName( $name );
        }

        public function isValidPassword( $password ) {
                //simple boolean wrapper for getPasswordValidity
                return $this->getPasswordValidity( $password ) === true;
        }

        public function getPasswordValidity( $password ) {
                global $wgMinimalPasswordLength, $wgContLang;

                static $blockedLogins = array(
                        'Useruser' => 'Passpass', 'Useruser1' => 'Passpass1', # r75589
                        'Apitestsysop' => 'testpass', 'Apitestuser' => 'testpass' # r75605
                );

                $result = false; //init $result to false for the internal checks

                if( !wfRunHooks( 'isValidPassword', array( $password, &$result, $this ) ) )
                        return $result;

                if ( $result === false ) {
                        if( strlen( $password ) < $wgMinimalPasswordLength ) {
                                return 'passwordtooshort';
                        } elseif ( $wgContLang->lc( $password ) == $wgContLang->lc( $this->mName ) ) {
                                return 'password-name-match';
                        } elseif ( isset( $blockedLogins[ $this->getName() ] ) && $password == $blockedLogins[ $this->getName() ] ) {
                                return 'password-login-forbidden';
                        } else {
                                //it seems weird returning true here, but this is because of the
                                //initialization of $result to false above. If the hook is never run or it
                                //doesn't modify $result, then we will likely get down into this if with
                                //a valid password.
                                return true;
                        }
                } elseif( $result === true ) {
                        return true;
                } else {
                        return $result; //the isValidPassword hook set a string $result and returned true
                }
        }

        public static function isValidEmailAddr( $addr ) {
                wfDeprecated( __METHOD__, '1.18' );
                return Sanitizer::validateEmail( $addr );
        }

        public static function getCanonicalName( $name, $validate = 'valid' ) {
                # Force usernames to capital
                global $wgContLang;
                $name = $wgContLang->ucfirst( $name );

                # Reject names containing '#'; these will be cleaned up
                # with title normalisation, but then it's too late to
                # check elsewhere
                if( strpos( $name, '#' ) !== false )
                        return false;

                # Clean up name according to title rules
                $t = ( $validate === 'valid' ) ?
                        Title::newFromText( $name ) : Title::makeTitle( NS_USER, $name );
                # Check for invalid titles
                if( is_null( $t ) ) {
                        return false;
                }

                # Reject various classes of invalid names
                global $wgAuth;
                $name = $wgAuth->getCanonicalName( $t->getText() );

                switch ( $validate ) {
                        case false:
                                break;
                        case 'valid':
                                if ( !User::isValidUserName( $name ) ) {
                                        $name = false;
                                }
                                break;
                        case 'usable':
                                if ( !User::isUsableName( $name ) ) {
                                        $name = false;
                                }
                                break;
                        case 'creatable':
                                if ( !User::isCreatableName( $name ) ) {
                                        $name = false;
                                }
                                break;
                        default:
                                throw new MWException( 'Invalid parameter value for $validate in ' . __METHOD__ );
                }
                return $name;
        }

        public static function edits( $uid ) {
                wfProfileIn( __METHOD__ );
                $dbr = wfGetDB( DB_SLAVE );
                // check if the user_editcount field has been initialized
                $field = $dbr->selectField(
                        'user', 'user_editcount',
                        array( 'user_id' => $uid ),
                        __METHOD__
                );

                if( $field === null ) { // it has not been initialized. do so.
                        $dbw = wfGetDB( DB_MASTER );
                        $count = $dbr->selectField(
                                'revision', 'count(*)',
                                array( 'rev_user' => $uid ),
                                __METHOD__
                        );
                        $dbw->update(
                                'user',
                                array( 'user_editcount' => $count ),
                                array( 'user_id' => $uid ),
                                __METHOD__
                        );
                } else {
                        $count = $field;
                }
                wfProfileOut( __METHOD__ );
                return $count;
        }

        public static function randomPassword() {
                global $wgMinimalPasswordLength;
                // Decide the final password length based on our min password length, stopping at a minimum of 10 chars
                $length = max( 10, $wgMinimalPasswordLength );
                // Multiply by 1.25 to get the number of hex characters we need
                $length = $length * 1.25;
                // Generate random hex chars
                $hex = MWCryptRand::generateHex( $length );
                // Convert from base 16 to base 32 to get a proper password like string
                return wfBaseConvert( $hex, 16, 32 );
        }

        public function loadDefaults( $name = false ) {
                wfProfileIn( __METHOD__ );

                $this->mId = 0;
                $this->mName = $name;
                $this->mRealName = '';
                $this->mPassword = $this->mNewpassword = '';
                $this->mNewpassTime = null;
                $this->mEmail = '';
                $this->mOptionOverrides = null;
                $this->mOptionsLoaded = false;

                $loggedOut = $this->getRequest()->getCookie( 'LoggedOut' );
                if( $loggedOut !== null ) {
                        $this->mTouched = wfTimestamp( TS_MW, $loggedOut );
                } else {
                        $this->mTouched = '0'; # Allow any pages to be cached
                }

                $this->mToken = null; // Don't run cryptographic functions till we need a token
                $this->mEmailAuthenticated = null;
                $this->mEmailToken = '';
                $this->mEmailTokenExpires = null;
                $this->mRegistration = wfTimestamp( TS_MW );
                $this->mGroups = array();

                wfRunHooks( 'UserLoadDefaults', array( $this, $name ) );

                wfProfileOut( __METHOD__ );
        }

        public function isItemLoaded( $item, $all = 'all' ) {
                return ( $this->mLoadedItems === true && $all === 'all' ) ||
                        ( isset( $this->mLoadedItems[$item] ) && $this->mLoadedItems[$item] === true );
        }

        private function setItemLoaded( $item ) {
                if ( is_array( $this->mLoadedItems ) ) {
                        $this->mLoadedItems[$item] = true;
                }
        }

        private function loadFromSession() {
                global $wgExternalAuthType, $wgAutocreatePolicy;

                $result = null;
                wfRunHooks( 'UserLoadFromSession', array( $this, &$result ) );
                if ( $result !== null ) {
                        return $result;
                }

                if ( $wgExternalAuthType && $wgAutocreatePolicy == 'view' ) {
                        $extUser = ExternalUser::newFromCookie();
                        if ( $extUser ) {
                                # TODO: Automatically create the user here (or probably a bit
                                # lower down, in fact)
                        }
                }

                $request = $this->getRequest();

                $cookieId = $request->getCookie( 'UserID' );
                $sessId = $request->getSessionData( 'wsUserID' );

                if ( $cookieId !== null ) {
                        $sId = intval( $cookieId );
                        if( $sessId !== null && $cookieId != $sessId ) {
                                $this->loadDefaults(); // Possible collision!
                                wfDebugLog( 'loginSessions', "Session user ID ($sessId) and
                                        cookie user ID ($sId) don't match!" );
                                return false;
                        }
                        $request->setSessionData( 'wsUserID', $sId );
                } elseif ( $sessId !== null && $sessId != 0 ) {
                        $sId = $sessId;
                } else {
                        $this->loadDefaults();
                        return false;
                }

                if ( $request->getSessionData( 'wsUserName' ) !== null ) {
                        $sName = $request->getSessionData( 'wsUserName' );
                } elseif ( $request->getCookie( 'UserName' ) !== null ) {
                        $sName = $request->getCookie( 'UserName' );
                        $request->setSessionData( 'wsUserName', $sName );
                } else {
                        $this->loadDefaults();
                        return false;
                }

                $proposedUser = User::newFromId( $sId );
                if ( !$proposedUser->isLoggedIn() ) {
                        # Not a valid ID
                        $this->loadDefaults();
                        return false;
                }

                global $wgBlockDisablesLogin;
                if( $wgBlockDisablesLogin && $proposedUser->isBlocked() ) {
                        # User blocked and we've disabled blocked user logins
                        $this->loadDefaults();
                        return false;
                }

                if ( $request->getSessionData( 'wsToken' ) ) {
                        $passwordCorrect = $proposedUser->getToken( false ) === $request->getSessionData( 'wsToken' );
                        $from = 'session';
                } elseif ( $request->getCookie( 'Token' ) ) {
                        # Get the token from DB/cache and clean it up to remove garbage padding.
                        # This deals with historical problems with bugs and the default column value.
                        $token = rtrim( $proposedUser->getToken( false ) ); // correct token
                        // Make comparison in constant time (bug 61346)
                        $passwordCorrect = strlen( $token ) && $this->compareSecrets( $token, $request->getCookie( 'Token' ) );
                        $from = 'cookie';
                } else {
                        # No session or persistent login cookie
                        $this->loadDefaults();
                        return false;
                }

                if ( ( $sName === $proposedUser->getName() ) && $passwordCorrect ) {
                        $this->loadFromUserObject( $proposedUser );
                        $request->setSessionData( 'wsToken', $this->mToken );
                        wfDebug( "User: logged in from $from\n" );
                        return true;
                } else {
                        # Invalid credentials
                        wfDebug( "User: can't log in from $from, invalid credentials\n" );
                        $this->loadDefaults();
                        return false;
                }
        }

        protected function compareSecrets( $answer, $test ) {
                if ( strlen( $answer ) !== strlen( $test ) ) {
                        $passwordCorrect = false;
                } else {
                        $result = 0;
                        for ( $i = 0; $i < strlen( $answer ); $i++ ) {
                                $result |= ord( $answer{$i} ) ^ ord( $test{$i} );
                        }
                        $passwordCorrect = ( $result == 0 );
                }
                return $passwordCorrect;
        }

        public function loadFromDatabase() {
                # Paranoia
                $this->mId = intval( $this->mId );

                if( !$this->mId ) {
                        $this->loadDefaults();
                        return false;
                }

                $dbr = wfGetDB( DB_MASTER );
                $s = $dbr->selectRow( 'user', '*', array( 'user_id' => $this->mId ), __METHOD__ );

                wfRunHooks( 'UserLoadFromDatabase', array( $this, &$s ) );

                if ( $s !== false ) {
                        # Initialise user table data
                        $this->loadFromRow( $s );
                        $this->mGroups = null; // deferred
                        $this->getEditCount(); // revalidation for nulls
                        return true;
                } else {
                        # Invalid user_id
                        $this->mId = 0;
                        $this->loadDefaults();
                        return false;
                }
        }

        public function loadFromRow( $row ) {
                $all = true;

                $this->mGroups = null; // deferred

                if ( isset( $row->user_name ) ) {
                        $this->mName = $row->user_name;
                        $this->mFrom = 'name';
                        $this->setItemLoaded( 'name' );
                } else {
                        $all = false;
                }

                if ( isset( $row->user_real_name ) ) {
                        $this->mRealName = $row->user_real_name;
                        $this->setItemLoaded( 'realname' );
                } else {
                        $all = false;
                }

                if ( isset( $row->user_id ) ) {
                        $this->mId = intval( $row->user_id );
                        $this->mFrom = 'id';
                        $this->setItemLoaded( 'id' );
                } else {
                        $all = false;
                }

                if ( isset( $row->user_editcount ) ) {
                        $this->mEditCount = $row->user_editcount;
                } else {
                        $all = false;
                }

                if ( isset( $row->user_password ) ) {
                        $this->mPassword = $row->user_password;
                        $this->mNewpassword = $row->user_newpassword;
                        $this->mNewpassTime = wfTimestampOrNull( TS_MW, $row->user_newpass_time );
                        $this->mEmail = $row->user_email;
                        if ( isset( $row->user_options ) ) {
                                $this->decodeOptions( $row->user_options );
                        }
                        $this->mTouched = wfTimestamp( TS_MW, $row->user_touched );
                        $this->mToken = $row->user_token;
                        if ( $this->mToken == '' ) {
                                $this->mToken = null;
                        }
                        $this->mEmailAuthenticated = wfTimestampOrNull( TS_MW, $row->user_email_authenticated );
                        $this->mEmailToken = $row->user_email_token;
                        $this->mEmailTokenExpires = wfTimestampOrNull( TS_MW, $row->user_email_token_expires );
                        $this->mRegistration = wfTimestampOrNull( TS_MW, $row->user_registration );
                } else {
                        $all = false;
                }

                if ( $all ) {
                        $this->mLoadedItems = true;
                }
        }

        protected function loadFromUserObject( $user ) {
                $user->load();
                $user->loadGroups();
                $user->loadOptions();
                foreach ( self::$mCacheVars as $var ) {
                        $this->$var = $user->$var;
                }
        }

        private function loadGroups() {
                if ( is_null( $this->mGroups ) ) {
                        $dbr = wfGetDB( DB_MASTER );
                        $res = $dbr->select( 'user_groups',
                                array( 'ug_group' ),
                                array( 'ug_user' => $this->mId ),
                                __METHOD__ );
                        $this->mGroups = array();
                        foreach ( $res as $row ) {
                                $this->mGroups[] = $row->ug_group;
                        }
                }
        }

        public function addAutopromoteOnceGroups( $event ) {
                global $wgAutopromoteOnceLogInRC;

                $toPromote = array();
                if ( $this->getId() ) {
                        $toPromote = Autopromote::getAutopromoteOnceGroups( $this, $event );
                        if ( count( $toPromote ) ) {
                                $oldGroups = $this->getGroups(); // previous groups
                                foreach ( $toPromote as $group ) {
                                        $this->addGroup( $group );
                                }
                                $newGroups = array_merge( $oldGroups, $toPromote ); // all groups

                                $log = new LogPage( 'rights', $wgAutopromoteOnceLogInRC /* in RC? */ );
                                $log->addEntry( 'autopromote',
                                        $this->getUserPage(),
                                        '', // no comment
                                        // These group names are "list to texted"-ed in class LogPage.
                                        array( implode( ', ', $oldGroups ), implode( ', ', $newGroups ) )
                                );
                        }
                }
                return $toPromote;
        }

        public function clearInstanceCache( $reloadFrom = false ) {
                $this->mNewtalk = -1;
                $this->mDatePreference = null;
                $this->mBlockedby = -1; # Unset
                $this->mHash = false;
                $this->mRights = null;
                $this->mEffectiveGroups = null;
                $this->mImplicitGroups = null;
                $this->mOptions = null;

                if ( $reloadFrom ) {
                        $this->mLoadedItems = array();
                        $this->mFrom = $reloadFrom;
                }
        }

        public static function getDefaultOptions() {
                global $wgNamespacesToBeSearchedDefault, $wgDefaultUserOptions, $wgContLang, $wgDefaultSkin;

                $defOpt = $wgDefaultUserOptions;
                # default language setting
                $variant = $wgContLang->getDefaultVariant();
                $defOpt['variant'] = $variant;
                $defOpt['language'] = $variant;
                foreach( SearchEngine::searchableNamespaces() as $nsnum => $nsname ) {
                        $defOpt['searchNs'.$nsnum] = !empty( $wgNamespacesToBeSearchedDefault[$nsnum] );
                }
                $defOpt['skin'] = $wgDefaultSkin;

                // FIXME: Ideally we'd cache the results of this function so the hook is only run once,
                // but that breaks the parser tests because they rely on being able to change $wgContLang
                // mid-request and see that change reflected in the return value of this function.
                // Which is insane and would never happen during normal MW operation, but is also not
                // likely to get fixed unless and until we context-ify everything.
                // See also https://www.mediawiki.org/wiki/Special:Code/MediaWiki/101488#c25275
                wfRunHooks( 'UserGetDefaultOptions', array( &$defOpt ) );

                return $defOpt;
        }

        public static function getDefaultOption( $opt ) {
                $defOpts = self::getDefaultOptions();
                if( isset( $defOpts[$opt] ) ) {
                        return $defOpts[$opt];
                } else {
                        return null;
                }
        }


        private function getBlockedStatus( $bFromSlave = true ) {
                global $wgProxyWhitelist, $wgUser;

                if ( -1 != $this->mBlockedby ) {
                        return;
                }

                wfProfileIn( __METHOD__ );
                wfDebug( __METHOD__.": checking...\n" );

                // Initialize data...
                // Otherwise something ends up stomping on $this->mBlockedby when
                // things get lazy-loaded later, causing false positive block hits
                // due to -1 !== 0. Probably session-related... Nothing should be
                // overwriting mBlockedby, surely?
                $this->load();

                # We only need to worry about passing the IP address to the Block generator if the
                # user is not immune to autoblocks/hardblocks, and they are the current user so we
                # know which IP address they're actually coming from
                if ( !$this->isAllowed( 'ipblock-exempt' ) && $this->getID() == $wgUser->getID() ) {
                        $ip = $this->getRequest()->getIP();
                } else {
                        $ip = null;
                }

                # User/IP blocking
                $block = Block::newFromTarget( $this->getName(), $ip, !$bFromSlave );

                # Proxy blocking
                if ( !$block instanceof Block && $ip !== null && !$this->isAllowed( 'proxyunbannable' )
                        && !in_array( $ip, $wgProxyWhitelist ) ) 
                {
                        # Local list
                        if ( self::isLocallyBlockedProxy( $ip ) ) {
                                $block = new Block;
                                $block->setBlocker( wfMsg( 'proxyblocker' ) );
                                $block->mReason = wfMsg( 'proxyblockreason' );
                                $block->setTarget( $ip );
                        } elseif ( $this->isAnon() && $this->isDnsBlacklisted( $ip ) ) {
                                $block = new Block;
                                $block->setBlocker( wfMsg( 'sorbs' ) );
                                $block->mReason = wfMsg( 'sorbsreason' );
                                $block->setTarget( $ip );
                        }
                }

                if ( $block instanceof Block ) {
                        wfDebug( __METHOD__ . ": Found block.\n" );
                        $this->mBlock = $block;
                        $this->mBlockedby = $block->getByName();
                        $this->mBlockreason = $block->mReason;
                        $this->mHideName = $block->mHideName;
                        $this->mAllowUsertalk = !$block->prevents( 'editownusertalk' );
                } else {
                        $this->mBlockedby = '';
                        $this->mHideName = 0;
                        $this->mAllowUsertalk = false;
                }

                # Extensions
                wfRunHooks( 'GetBlockedStatus', array( &$this ) );

                wfProfileOut( __METHOD__ );
        }

        public function isDnsBlacklisted( $ip, $checkWhitelist = false ) {
                global $wgEnableSorbs, $wgEnableDnsBlacklist,
                        $wgSorbsUrl, $wgDnsBlacklistUrls, $wgProxyWhitelist;

                if ( !$wgEnableDnsBlacklist && !$wgEnableSorbs )
                        return false;

                if ( $checkWhitelist && in_array( $ip, $wgProxyWhitelist ) )
                        return false;

                $urls = array_merge( $wgDnsBlacklistUrls, (array)$wgSorbsUrl );
                return $this->inDnsBlacklist( $ip, $urls );
        }

        public function inDnsBlacklist( $ip, $bases ) {
                wfProfileIn( __METHOD__ );

                $found = false;
                // @todo FIXME: IPv6 ???  (http://bugs.php.net/bug.php?id=33170)
                if( IP::isIPv4( $ip ) ) {
                        # Reverse IP, bug 21255
                        $ipReversed = implode( '.', array_reverse( explode( '.', $ip ) ) );

                        foreach( (array)$bases as $base ) {
                                # Make hostname
                                # If we have an access key, use that too (ProjectHoneypot, etc.)
                                if( is_array( $base ) ) {
                                        if( count( $base ) >= 2 ) {
                                                # Access key is 1, base URL is 0
                                                $host = "{$base[1]}.$ipReversed.{$base[0]}";
                                        } else {
                                                $host = "$ipReversed.{$base[0]}";
                                        }
                                } else {
                                        $host = "$ipReversed.$base";
                                }

                                # Send query
                                $ipList = gethostbynamel( $host );

                                if( $ipList ) {
                                        wfDebug( "Hostname $host is {$ipList[0]}, it's a proxy says $base!\n" );
                                        $found = true;
                                        break;
                                } else {
                                        wfDebug( "Requested $host, not found in $base.\n" );
                                }
                        }
                }

                wfProfileOut( __METHOD__ );
                return $found;
        }

        public static function isLocallyBlockedProxy( $ip ) {
                global $wgProxyList;

                if ( !$wgProxyList ) {
                        return false;
                }
                wfProfileIn( __METHOD__ );

                if ( !is_array( $wgProxyList ) ) {
                        # Load from the specified file
                        $wgProxyList = array_map( 'trim', file( $wgProxyList ) );
                }

                if ( !is_array( $wgProxyList ) ) {
                        $ret = false;
                } elseif ( array_search( $ip, $wgProxyList ) !== false ) {
                        $ret = true;
                } elseif ( array_key_exists( $ip, $wgProxyList ) ) {
                        # Old-style flipped proxy list
                        $ret = true;
                } else {
                        $ret = false;
                }
                wfProfileOut( __METHOD__ );
                return $ret;
        }

        public function isPingLimitable() {
                global $wgRateLimitsExcludedIPs;
                if( in_array( $this->getRequest()->getIP(), $wgRateLimitsExcludedIPs ) ) {
                        // No other good way currently to disable rate limits
                        // for specific IPs. :P
                        // But this is a crappy hack and should die.
                        return false;
                }
                return !$this->isAllowed('noratelimit');
        }

        public function pingLimiter( $action = 'edit' ) {
                # Call the 'PingLimiter' hook
                $result = false;
                if( !wfRunHooks( 'PingLimiter', array( &$this, $action, $result ) ) ) {
                        return $result;
                }

                global $wgRateLimits;
                if( !isset( $wgRateLimits[$action] ) ) {
                        return false;
                }

                # Some groups shouldn't trigger the ping limiter, ever
                if( !$this->isPingLimitable() )
                        return false;

                global $wgMemc, $wgRateLimitLog;
                wfProfileIn( __METHOD__ );

                $limits = $wgRateLimits[$action];
                $keys = array();
                $id = $this->getId();
                $ip = $this->getRequest()->getIP();
                $userLimit = false;

                if( isset( $limits['anon'] ) && $id == 0 ) {
                        $keys[wfMemcKey( 'limiter', $action, 'anon' )] = $limits['anon'];
                }

                if( isset( $limits['user'] ) && $id != 0 ) {
                        $userLimit = $limits['user'];
                }
                if( $this->isNewbie() ) {
                        if( isset( $limits['newbie'] ) && $id != 0 ) {
                                $keys[wfMemcKey( 'limiter', $action, 'user', $id )] = $limits['newbie'];
                        }
                        if( isset( $limits['ip'] ) ) {
                                $keys["mediawiki:limiter:$action:ip:$ip"] = $limits['ip'];
                        }
                        $matches = array();
                        if( isset( $limits['subnet'] ) && preg_match( '/^(\d+\.\d+\.\d+)\.\d+$/', $ip, $matches ) ) {
                                $subnet = $matches[1];
                                $keys["mediawiki:limiter:$action:subnet:$subnet"] = $limits['subnet'];
                        }
                }
                // Check for group-specific permissions
                // If more than one group applies, use the group with the highest limit
                foreach ( $this->getGroups() as $group ) {
                        if ( isset( $limits[$group] ) ) {
                                if ( $userLimit === false || $limits[$group] > $userLimit ) {
                                        $userLimit = $limits[$group];
                                }
                        }
                }
                // Set the user limit key
                if ( $userLimit !== false ) {
                        wfDebug( __METHOD__ . ": effective user limit: $userLimit\n" );
                        $keys[ wfMemcKey( 'limiter', $action, 'user', $id ) ] = $userLimit;
                }

                $triggered = false;
                foreach( $keys as $key => $limit ) {
                        list( $max, $period ) = $limit;
                        $summary = "(limit $max in {$period}s)";
                        $count = $wgMemc->get( $key );
                        // Already pinged?
                        if( $count ) {
                                if( $count > $max ) {
                                        wfDebug( __METHOD__ . ": tripped! $key at $count $summary\n" );
                                        if( $wgRateLimitLog ) {
                                                wfSuppressWarnings();
                                                file_put_contents( $wgRateLimitLog, wfTimestamp( TS_MW ) . ' ' . wfWikiID() . ': ' . $this->getName() . " tripped $key at $count $summary\n", FILE_APPEND );
                                                wfRestoreWarnings();
                                        }
                                        $triggered = true;
                                } else {
                                        wfDebug( __METHOD__ . ": ok. $key at $count $summary\n" );
                                }
                        } else {
                                wfDebug( __METHOD__ . ": adding record for $key $summary\n" );
                                $wgMemc->add( $key, 0, intval( $period ) ); // first ping
                        }
                        $wgMemc->incr( $key );
                }

                wfProfileOut( __METHOD__ );
                return $triggered;
        }

        public function isBlocked( $bFromSlave = true ) { // hacked from false due to horrible probs on site
                return $this->getBlock( $bFromSlave ) instanceof Block && $this->getBlock()->prevents( 'edit' );
        }

        public function getBlock( $bFromSlave = true ){
                $this->getBlockedStatus( $bFromSlave );
                return $this->mBlock instanceof Block ? $this->mBlock : null;
        }

        function isBlockedFrom( $title, $bFromSlave = false ) {
                global $wgBlockAllowsUTEdit;
                wfProfileIn( __METHOD__ );

                $blocked = $this->isBlocked( $bFromSlave );
                $allowUsertalk = ( $wgBlockAllowsUTEdit ? $this->mAllowUsertalk : false );
                # If a user's name is suppressed, they cannot make edits anywhere
                if ( !$this->mHideName && $allowUsertalk && $title->getText() === $this->getName() &&
                  $title->getNamespace() == NS_USER_TALK ) {
                        $blocked = false;
                        wfDebug( __METHOD__ . ": self-talk page, ignoring any blocks\n" );
                }

                wfRunHooks( 'UserIsBlockedFrom', array( $this, $title, &$blocked, &$allowUsertalk ) );

                wfProfileOut( __METHOD__ );
                return $blocked;
        }

        public function blockedBy() {
                $this->getBlockedStatus();
                return $this->mBlockedby;
        }

        public function blockedFor() {
                $this->getBlockedStatus();
                return $this->mBlockreason;
        }

        public function getBlockId() {
                $this->getBlockedStatus();
                return ( $this->mBlock ? $this->mBlock->getId() : false );
        }

        public function isBlockedGlobally( $ip = '' ) {
                if( $this->mBlockedGlobally !== null ) {
                        return $this->mBlockedGlobally;
                }
                // User is already an IP?
                if( IP::isIPAddress( $this->getName() ) ) {
                        $ip = $this->getName();
                } elseif( !$ip ) {
                        $ip = $this->getRequest()->getIP();
                }
                $blocked = false;
                wfRunHooks( 'UserIsBlockedGlobally', array( &$this, $ip, &$blocked ) );
                $this->mBlockedGlobally = (bool)$blocked;
                return $this->mBlockedGlobally;
        }

        public function isLocked() {
                if( $this->mLocked !== null ) {
                        return $this->mLocked;
                }
                global $wgAuth;
                $authUser = $wgAuth->getUserInstance( $this );
                $this->mLocked = (bool)$authUser->isLocked();
                return $this->mLocked;
        }

        public function isHidden() {
                if( $this->mHideName !== null ) {
                        return $this->mHideName;
                }
                $this->getBlockedStatus();
                if( !$this->mHideName ) {
                        global $wgAuth;
                        $authUser = $wgAuth->getUserInstance( $this );
                        $this->mHideName = (bool)$authUser->isHidden();
                }
                return $this->mHideName;
        }

        public function getId() {
                if( $this->mId === null && $this->mName !== null
                && User::isIP( $this->mName ) ) {
                        // Special case, we know the user is anonymous
                        return 0;
                } elseif( !$this->isItemLoaded( 'id' ) ) {
                        // Don't load if this was initialized from an ID
                        $this->load();
                }
                return $this->mId;
        }

        public function setId( $v ) {
                $this->mId = $v;
                $this->clearInstanceCache( 'id' );
        }

        public function getName() {
                if ( $this->isItemLoaded( 'name', 'only' ) ) {
                        # Special case optimisation
                        return $this->mName;
                } else {
                        $this->load();
                        if ( $this->mName === false ) {
                                # Clean up IPs
                                $this->mName = IP::sanitizeIP( $this->getRequest()->getIP() );
                        }
                        return $this->mName;
                }
        }

        public function setName( $str ) {
                $this->load();
                $this->mName = $str;
        }

        public function getTitleKey() {
                return str_replace( ' ', '_', $this->getName() );
        }

        public function getNewtalk() {
                $this->load();

                # Load the newtalk status if it is unloaded (mNewtalk=-1)
                if( $this->mNewtalk === -1 ) {
                        $this->mNewtalk = false; # reset talk page status

                        # Check memcached separately for anons, who have no
                        # entire User object stored in there.
                        if( !$this->mId ) {
                                global $wgMemc;
                                $key = wfMemcKey( 'newtalk', 'ip', $this->getName() );
                                $newtalk = $wgMemc->get( $key );
                                if( strval( $newtalk ) !== '' ) {
                                        $this->mNewtalk = (bool)$newtalk;
                                } else {
                                        // Since we are caching this, make sure it is up to date by getting it
                                        // from the master
                                        $this->mNewtalk = $this->checkNewtalk( 'user_ip', $this->getName(), true );
                                        $wgMemc->set( $key, (int)$this->mNewtalk, 1800 );
                                }
                        } else {
                                $this->mNewtalk = $this->checkNewtalk( 'user_id', $this->mId );
                        }
                }

                return (bool)$this->mNewtalk;
        }

        public function getNewMessageLinks() {
                $talks = array();
                if( !wfRunHooks( 'UserRetrieveNewTalks', array( &$this, &$talks ) ) )
                        return $talks;

                if( !$this->getNewtalk() )
                        return array();
                $up = $this->getUserPage();
                $utp = $up->getTalkPage();
                return array( array( 'wiki' => wfWikiID(), 'link' => $utp->getLocalURL() ) );
        }

        protected function checkNewtalk( $field, $id, $fromMaster = false ) {
                if ( $fromMaster ) {
                        $db = wfGetDB( DB_MASTER );
                } else {
                        $db = wfGetDB( DB_SLAVE );
                }
                $ok = $db->selectField( 'user_newtalk', $field,
                        array( $field => $id ), __METHOD__ );
                return $ok !== false;
        }

        protected function updateNewtalk( $field, $id ) {
                $dbw = wfGetDB( DB_MASTER );
                $dbw->insert( 'user_newtalk',
                        array( $field => $id ),
                        __METHOD__,
                        'IGNORE' );
                if ( $dbw->affectedRows() ) {
                        wfDebug( __METHOD__ . ": set on ($field, $id)\n" );
                        return true;
                } else {
                        wfDebug( __METHOD__ . " already set ($field, $id)\n" );
                        return false;
                }
        }

        protected function deleteNewtalk( $field, $id ) {
                $dbw = wfGetDB( DB_MASTER );
                $dbw->delete( 'user_newtalk',
                        array( $field => $id ),
                        __METHOD__ );
                if ( $dbw->affectedRows() ) {
                        wfDebug( __METHOD__ . ": killed on ($field, $id)\n" );
                        return true;
                } else {
                        wfDebug( __METHOD__ . ": already gone ($field, $id)\n" );
                        return false;
                }
        }

        public function setNewtalk( $val ) {
                if( wfReadOnly() ) {
                        return;
                }

                $this->load();
                $this->mNewtalk = $val;

                if( $this->isAnon() ) {
                        $field = 'user_ip';
                        $id = $this->getName();
                } else {
                        $field = 'user_id';
                        $id = $this->getId();
                }
                global $wgMemc;

                if( $val ) {
                        $changed = $this->updateNewtalk( $field, $id );
                } else {
                        $changed = $this->deleteNewtalk( $field, $id );
                }

                if( $this->isAnon() ) {
                        // Anons have a separate memcached space, since
                        // user records aren't kept for them.
                        $key = wfMemcKey( 'newtalk', 'ip', $id );
                        $wgMemc->set( $key, $val ? 1 : 0, 1800 );
                }
                if ( $changed ) {
                        $this->invalidateCache();
                }
        }

        private static function newTouchedTimestamp() {
                global $wgClockSkewFudge;
                return wfTimestamp( TS_MW, time() + $wgClockSkewFudge );
        }

        private function clearSharedCache() {
                $this->load();
                if( $this->mId ) {
                        global $wgMemc;
                        $wgMemc->delete( wfMemcKey( 'user', 'id', $this->mId ) );
                }
        }

        public function invalidateCache() {
                if( wfReadOnly() ) {
                        return;
                }
                $this->load();
                if( $this->mId ) {
                        $this->mTouched = self::newTouchedTimestamp();

                        $dbw = wfGetDB( DB_MASTER );
                        $dbw->update( 'user',
                                array( 'user_touched' => $dbw->timestamp( $this->mTouched ) ),
                                array( 'user_id' => $this->mId ),
                                __METHOD__ );

                        $this->clearSharedCache();
                }
        }

        public function validateCache( $timestamp ) {
                $this->load();
                return ( $timestamp >= $this->mTouched );
        }

        public function getTouched() {
                $this->load();
                return $this->mTouched;
        }

        public function setPassword( $str ) {
                global $wgAuth;

                if( $str !== null ) {
                        if( !$wgAuth->allowPasswordChange() ) {
                                throw new PasswordError( wfMsg( 'password-change-forbidden' ) );
                        }

                        if( !$this->isValidPassword( $str ) ) {
                                global $wgMinimalPasswordLength;
                                $valid = $this->getPasswordValidity( $str );
                                if ( is_array( $valid ) ) {
                                        $message = array_shift( $valid );
                                        $params = $valid;
                                } else {
                                        $message = $valid;
                                        $params = array( $wgMinimalPasswordLength );
                                }
                                throw new PasswordError( wfMsgExt( $message, array( 'parsemag' ), $params ) );
                        }
                }

                if( !$wgAuth->setPassword( $this, $str ) ) {
                        throw new PasswordError( wfMsg( 'externaldberror' ) );
                }

                $this->setInternalPassword( $str );

                return true;
        }

        public function setInternalPassword( $str ) {
                $this->load();
                $this->setToken();

                if( $str === null ) {
                        // Save an invalid hash...
                        $this->mPassword = '';
                } else {
                        $this->mPassword = self::crypt( $str );
                }
                $this->mNewpassword = '';
                $this->mNewpassTime = null;
        }

        public function getToken( $forceCreation = true ) {
                $this->load();
                if ( !$this->mToken && $forceCreation ) {
                        $this->setToken();
                }
                return $this->mToken;
        }

        public function setToken( $token = false ) {
                global $wgSecretKey, $wgProxyKey;
                $this->load();
                if ( !$token ) {
                        $this->mToken = MWCryptRand::generateHex( USER_TOKEN_LENGTH );
                } else {
                        $this->mToken = $token;
                }
        }

        private function setCookiePassword( $str ) {
                $this->load();
                $this->mCookiePassword = md5( $str );
        }

        public function setNewpassword( $str, $throttle = true ) {
                $this->load();
                $this->mNewpassword = self::crypt( $str );
                if ( $throttle ) {
                        $this->mNewpassTime = wfTimestampNow();
                }
        }

        public function isPasswordReminderThrottled() {
                global $wgPasswordReminderResendTime;
                $this->load();
                if ( !$this->mNewpassTime || !$wgPasswordReminderResendTime ) {
                        return false;
                }
                $expiry = wfTimestamp( TS_UNIX, $this->mNewpassTime ) + $wgPasswordReminderResendTime * 3600;
                return time() < $expiry;
        }

        public function getEmail() {
                $this->load();
                wfRunHooks( 'UserGetEmail', array( $this, &$this->mEmail ) );
                return $this->mEmail;
        }

        public function getEmailAuthenticationTimestamp() {
                $this->load();
                wfRunHooks( 'UserGetEmailAuthenticationTimestamp', array( $this, &$this->mEmailAuthenticated ) );
                return $this->mEmailAuthenticated;
        }

        public function setEmail( $str ) {
                $this->load();
                if( $str == $this->mEmail ) {
                        return;
                }
                $this->mEmail = $str;
                $this->invalidateEmail();
                wfRunHooks( 'UserSetEmail', array( $this, &$this->mEmail ) );
        }

        public function getRealName() {
                if ( !$this->isItemLoaded( 'realname' ) ) {
                        $this->load();
                }

                return $this->mRealName;
        }

        public function setRealName( $str ) {
                $this->load();
                $this->mRealName = $str;
        }

        public function getOption( $oname, $defaultOverride = null, $ignoreHidden = false ) {
                global $wgHiddenPrefs;
                $this->loadOptions();

                if ( is_null( $this->mOptions ) ) {
                        if($defaultOverride != '') {
                                return $defaultOverride;
                        }
                        $this->mOptions = User::getDefaultOptions();
                }

                # We want 'disabled' preferences to always behave as the default value for
                # users, even if they have set the option explicitly in their settings (ie they
                # set it, and then it was disabled removing their ability to change it).  But
                # we don't want to erase the preferences in the database in case the preference
                # is re-enabled again.  So don't touch $mOptions, just override the returned value
                if( in_array( $oname, $wgHiddenPrefs ) && !$ignoreHidden ){
                        return self::getDefaultOption( $oname );
                }

                if ( array_key_exists( $oname, $this->mOptions ) ) {
                        return $this->mOptions[$oname];
                } else {
                        return $defaultOverride;
                }
        }

        public function getOptions() {
                global $wgHiddenPrefs;
                $this->loadOptions();
                $options = $this->mOptions;

                # We want 'disabled' preferences to always behave as the default value for
                # users, even if they have set the option explicitly in their settings (ie they
                # set it, and then it was disabled removing their ability to change it).  But
                # we don't want to erase the preferences in the database in case the preference
                # is re-enabled again.  So don't touch $mOptions, just override the returned value
                foreach( $wgHiddenPrefs as $pref ){
                        $default = self::getDefaultOption( $pref );
                        if( $default !== null ){
                                $options[$pref] = $default;
                        }
                }

                return $options;
        }

        public function getBoolOption( $oname ) {
                return (bool)$this->getOption( $oname );
        }

        public function getIntOption( $oname, $defaultOverride=0 ) {
                $val = $this->getOption( $oname );
                if( $val == '' ) {
                        $val = $defaultOverride;
                }
                return intval( $val );
        }

        public function setOption( $oname, $val ) {
                $this->load();
                $this->loadOptions();

                // Explicitly NULL values should refer to defaults
                global $wgDefaultUserOptions;
                if( is_null( $val ) && isset( $wgDefaultUserOptions[$oname] ) ) {
                        $val = $wgDefaultUserOptions[$oname];
                }

                $this->mOptions[$oname] = $val;
        }

        public function resetOptions() {
                $this->mOptions = self::getDefaultOptions();
        }

        public function getDatePreference() {
                // Important migration for old data rows
                if ( is_null( $this->mDatePreference ) ) {
                        global $wgLang;
                        $value = $this->getOption( 'date' );
                        $map = $wgLang->getDatePreferenceMigrationMap();
                        if ( isset( $map[$value] ) ) {
                                $value = $map[$value];
                        }
                        $this->mDatePreference = $value;
                }
                return $this->mDatePreference;
        }

        public function getStubThreshold() {
                global $wgMaxArticleSize; # Maximum article size, in Kb
                $threshold = intval( $this->getOption( 'stubthreshold' ) );
                if ( $threshold > $wgMaxArticleSize * 1024 ) {
                        # If they have set an impossible value, disable the preference
                        # so we can use the parser cache again.
                        $threshold = 0;
                }
                return $threshold;
        }

        public function getRights() {
                if ( is_null( $this->mRights ) ) {
                        $this->mRights = self::getGroupPermissions( $this->getEffectiveGroups() );
                        wfRunHooks( 'UserGetRights', array( $this, &$this->mRights ) );
                        // Force reindexation of rights when a hook has unset one of them
                        $this->mRights = array_values( $this->mRights );
                }
                return $this->mRights;
        }

        public function getGroups() {
                $this->load();
                $this->loadGroups();
                return $this->mGroups;
        }

        public function getEffectiveGroups( $recache = false ) {
                if ( $recache || is_null( $this->mEffectiveGroups ) ) {
                        wfProfileIn( __METHOD__ );
                        $this->mEffectiveGroups = array_unique( array_merge(
                                $this->getGroups(), // explicit groups
                                $this->getAutomaticGroups( $recache ) // implicit groups
                        ) );
                        # Hook for additional groups
                        wfRunHooks( 'UserEffectiveGroups', array( &$this, &$this->mEffectiveGroups ) );
                        wfProfileOut( __METHOD__ );
                }
                return $this->mEffectiveGroups;
        }

        public function getAutomaticGroups( $recache = false ) {
                if ( $recache || is_null( $this->mImplicitGroups ) ) {
                        wfProfileIn( __METHOD__ );
                        $this->mImplicitGroups = array( '*' );
                        if ( $this->getId() ) {
                                $this->mImplicitGroups[] = 'user';

                                $this->mImplicitGroups = array_unique( array_merge(
                                        $this->mImplicitGroups,
                                        Autopromote::getAutopromoteGroups( $this )
                                ) );
                        }
                        if ( $recache ) {
                                # Assure data consistency with rights/groups,
                                # as getEffectiveGroups() depends on this function
                                $this->mEffectiveGroups = null;
                        }
                        wfProfileOut( __METHOD__ );
                }
                return $this->mImplicitGroups;
        }

        public function getFormerGroups() {
                if( is_null( $this->mFormerGroups ) ) {
                        $dbr = wfGetDB( DB_MASTER );
                        $res = $dbr->select( 'user_former_groups',
                                array( 'ufg_group' ),
                                array( 'ufg_user' => $this->mId ),
                                __METHOD__ );
                        $this->mFormerGroups = array();
                        foreach( $res as $row ) {
                                $this->mFormerGroups[] = $row->ufg_group;
                        }
                }
                return $this->mFormerGroups;
        }

        public function getEditCount() {
                if( $this->getId() ) {
                        if ( !isset( $this->mEditCount ) ) {
                                /* Populate the count, if it has not been populated yet */
                                $this->mEditCount = User::edits( $this->mId );
                        }
                        return $this->mEditCount;
                } else {
                        /* nil */
                        return null;
                }
        }

        public function addGroup( $group ) {
                if( wfRunHooks( 'UserAddGroup', array( $this, &$group ) ) ) {
                        $dbw = wfGetDB( DB_MASTER );
                        if( $this->getId() ) {
                                $dbw->insert( 'user_groups',
                                        array(
                                                'ug_user'  => $this->getID(),
                                                'ug_group' => $group,
                                        ),
                                        __METHOD__,
                                        array( 'IGNORE' ) );
                        }
                }
                $this->loadGroups();
                $this->mGroups[] = $group;
                $this->mRights = User::getGroupPermissions( $this->getEffectiveGroups( true ) );

                $this->invalidateCache();
        }

        public function removeGroup( $group ) {
                $this->load();
                if( wfRunHooks( 'UserRemoveGroup', array( $this, &$group ) ) ) {
                        $dbw = wfGetDB( DB_MASTER );
                        $dbw->delete( 'user_groups',
                                array(
                                        'ug_user'  => $this->getID(),
                                        'ug_group' => $group,
                                ), __METHOD__ );
                        // Remember that the user was in this group
                        $dbw->insert( 'user_former_groups',
                                array(
                                        'ufg_user'  => $this->getID(),
                                        'ufg_group' => $group,
                                ),
                                __METHOD__,
                                array( 'IGNORE' ) );
                }
                $this->loadGroups();
                $this->mGroups = array_diff( $this->mGroups, array( $group ) );
                $this->mRights = User::getGroupPermissions( $this->getEffectiveGroups( true ) );

                $this->invalidateCache();
        }

        public function isLoggedIn() {
                return $this->getID() != 0;
        }

        public function isAnon() {
                return !$this->isLoggedIn();
        }

        public function isAllowedAny( /*...*/ ){
                $permissions = func_get_args();
                foreach( $permissions as $permission ){
                        if( $this->isAllowed( $permission ) ){
                                return true;
                        }
                }
                return false;
        }

        public function isAllowedAll( /*...*/ ){
                $permissions = func_get_args();
                foreach( $permissions as $permission ){
                        if( !$this->isAllowed( $permission ) ){
                                return false;
                        }
                }
                return true;
        }

        public function isAllowed( $action = '' ) {
                if ( $action === '' ) {
                        return true; // In the spirit of DWIM
                }
                # Patrolling may not be enabled
                if( $action === 'patrol' || $action === 'autopatrol' ) {
                        global $wgUseRCPatrol, $wgUseNPPatrol;
                        if( !$wgUseRCPatrol && !$wgUseNPPatrol )
                                return false;
                }
                # Use strict parameter to avoid matching numeric 0 accidentally inserted
                # by misconfiguration: 0 == 'foo'
                return in_array( $action, $this->getRights(), true );
        }

        public function useRCPatrol() {
                global $wgUseRCPatrol;
                return $wgUseRCPatrol && $this->isAllowedAny( 'patrol', 'patrolmarks' );
        }

        public function useNPPatrol() {
                global $wgUseRCPatrol, $wgUseNPPatrol;
                return( ( $wgUseRCPatrol || $wgUseNPPatrol ) && ( $this->isAllowedAny( 'patrol', 'patrolmarks' ) ) );
        }

        public function getRequest() {
                if ( $this->mRequest ) {
                        return $this->mRequest;
                } else {
                        global $wgRequest;
                        return $wgRequest;
                }
        }

        public function getSkin() {
                wfDeprecated( __METHOD__, '1.18' );
                return RequestContext::getMain()->getSkin();
        }

        public function isWatched( $title ) {
                $wl = WatchedItem::fromUserTitle( $this, $title );
                return $wl->isWatched();
        }

        public function addWatch( $title ) {
                $wl = WatchedItem::fromUserTitle( $this, $title );
                $wl->addWatch();
                $this->invalidateCache();
        }

        public function removeWatch( $title ) {
                $wl = WatchedItem::fromUserTitle( $this, $title );
                $wl->removeWatch();
                $this->invalidateCache();
        }

        public function clearNotification( &$title ) {
                global $wgUseEnotif, $wgShowUpdatedMarker;

                # Do nothing if the database is locked to writes
                if( wfReadOnly() ) {
                        return;
                }

                if( $title->getNamespace() == NS_USER_TALK &&
                        $title->getText() == $this->getName() ) {
                        if( !wfRunHooks( 'UserClearNewTalkNotification', array( &$this ) ) )
                                return;
                        $this->setNewtalk( false );
                }

                if( !$wgUseEnotif && !$wgShowUpdatedMarker ) {
                        return;
                }

                if( $this->isAnon() ) {
                        // Nothing else to do...
                        return;
                }

                // Only update the timestamp if the page is being watched.
                // The query to find out if it is watched is cached both in memcached and per-invocation,
                // and when it does have to be executed, it can be on a slave
                // If this is the user's newtalk page, we always update the timestamp
                if( $title->getNamespace() == NS_USER_TALK &&
                        $title->getText() == $this->getName() )
                {
                        $watched = true;
                } else {
                        $watched = $this->isWatched( $title );
                }

                // If the page is watched by the user (or may be watched), update the timestamp on any
                // any matching rows
                if ( $watched ) {
                        $dbw = wfGetDB( DB_MASTER );
                        $dbw->update( 'watchlist',
                                        array( /* SET */
                                                'wl_notificationtimestamp' => null
                                        ), array( /* WHERE */
                                                'wl_title' => $title->getDBkey(),
                                                'wl_namespace' => $title->getNamespace(),
                                                'wl_user' => $this->getID()
                                        ), __METHOD__
                        );
                }
        }

        public function clearAllNotifications() {
                global $wgUseEnotif, $wgShowUpdatedMarker;
                if ( !$wgUseEnotif && !$wgShowUpdatedMarker ) {
                        $this->setNewtalk( false );
                        return;
                }
                $id = $this->getId();
                if( $id != 0 )  {
                        $dbw = wfGetDB( DB_MASTER );
                        $dbw->update( 'watchlist',
                                array( /* SET */
                                        'wl_notificationtimestamp' => null
                                ), array( /* WHERE */
                                        'wl_user' => $id
                                ), __METHOD__
                        );
                #       We also need to clear here the "you have new message" notification for the own user_talk page
                #       This is cleared one page view later in Article::viewUpdates();
                }
        }

        private function decodeOptions( $str ) {
                wfDeprecated( __METHOD__, '1.19' );
                if( !$str )
                        return;

                $this->mOptionsLoaded = true;
                $this->mOptionOverrides = array();

                // If an option is not set in $str, use the default value
                $this->mOptions = self::getDefaultOptions();

                $a = explode( "\n", $str );
                foreach ( $a as $s ) {
                        $m = array();
                        if ( preg_match( "/^(.[^=]*)=(.*)$/", $s, $m ) ) {
                                $this->mOptions[$m[1]] = $m[2];
                                $this->mOptionOverrides[$m[1]] = $m[2];
                        }
                }
        }

        protected function setCookie( $name, $value, $exp = 0 ) {
                $this->getRequest()->response()->setcookie( $name, $value, $exp );
        }

        protected function clearCookie( $name ) {
                $this->setCookie( $name, '', time() - 86400 );
        }

        public function setCookies( $request = null ) {
                if ( $request === null ) {
                        $request = $this->getRequest();
                }

                $this->load();
                if ( 0 == $this->mId ) return;
                if ( !$this->mToken ) {
                        // When token is empty or NULL generate a new one and then save it to the database
                        // This allows a wiki to re-secure itself after a leak of it's user table or $wgSecretKey
                        // Simply by setting every cell in the user_token column to NULL and letting them be
                        // regenerated as users log back into the wiki.
                        $this->setToken();
                        $this->saveSettings();
                }
                $session = array(
                        'wsUserID' => $this->mId,
                        'wsToken' => $this->mToken,
                        'wsUserName' => $this->getName()
                );
                $cookies = array(
                        'UserID' => $this->mId,
                        'UserName' => $this->getName(),
                );
                if ( 1 == $this->getOption( 'rememberpassword' ) ) {
                        $cookies['Token'] = $this->mToken;
                } else {
                        $cookies['Token'] = false;
                }

                wfRunHooks( 'UserSetCookies', array( $this, &$session, &$cookies ) );

                foreach ( $session as $name => $value ) {
                        $request->setSessionData( $name, $value );
                }
                foreach ( $cookies as $name => $value ) {
                        if ( $value === false ) {
                                $this->clearCookie( $name );
                        } else {
                                $this->setCookie( $name, $value );
                        }
                }
        }

        public function logout() {
                if( wfRunHooks( 'UserLogout', array( &$this ) ) ) {
                        $this->doLogout();
                }
        }

        public function doLogout() {
                $this->clearInstanceCache( 'defaults' );

                $this->getRequest()->setSessionData( 'wsUserID', 0 );

                $this->clearCookie( 'UserID' );
                $this->clearCookie( 'Token' );

                # Remember when user logged out, to prevent seeing cached pages
                $this->setCookie( 'LoggedOut', wfTimestampNow(), time() + 86400 );
        }

        public function saveSettings() {
                global $wgAuth;

                $this->load();
                if ( wfReadOnly() ) { return; }
                if ( 0 == $this->mId ) { return; }

                $this->mTouched = self::newTouchedTimestamp();
                if ( !$wgAuth->allowSetLocalPassword() ) {
                        $this->mPassword = '';
                }

                $dbw = wfGetDB( DB_MASTER );
                $dbw->update( 'user',
                        array( /* SET */
                                'user_name' => $this->mName,
                                'user_password' => $this->mPassword,
                                'user_newpassword' => $this->mNewpassword,
                                'user_newpass_time' => $dbw->timestampOrNull( $this->mNewpassTime ),
                                'user_real_name' => $this->mRealName,
                                'user_email' => $this->mEmail,
                                'user_email_authenticated' => $dbw->timestampOrNull( $this->mEmailAuthenticated ),
                                'user_touched' => $dbw->timestamp( $this->mTouched ),
                                'user_token' => strval( $this->mToken ),
                                'user_email_token' => $this->mEmailToken,
                                'user_email_token_expires' => $dbw->timestampOrNull( $this->mEmailTokenExpires ),
                        ), array( /* WHERE */
                                'user_id' => $this->mId
                        ), __METHOD__
                );

                $this->saveOptions();

                wfRunHooks( 'UserSaveSettings', array( $this ) );
                $this->clearSharedCache();
                $this->getUserPage()->invalidateCache();
        }

        public function idForName() {
                $s = trim( $this->getName() );
                if ( $s === '' ) return 0;

                $dbr = wfGetDB( DB_SLAVE );
                $id = $dbr->selectField( 'user', 'user_id', array( 'user_name' => $s ), __METHOD__ );
                if ( $id === false ) {
                        $id = 0;
                }
                return $id;
        }

        public static function createNew( $name, $params = array() ) {
                $user = new User;
                $user->load();
                if ( isset( $params['options'] ) ) {
                        $user->mOptions = $params['options'] + (array)$user->mOptions;
                        unset( $params['options'] );
                }
                $dbw = wfGetDB( DB_MASTER );
                $seqVal = $dbw->nextSequenceValue( 'user_user_id_seq' );

                $fields = array(
                        'user_id' => $seqVal,
                        'user_name' => $name,
                        'user_password' => $user->mPassword,
                        'user_newpassword' => $user->mNewpassword,
                        'user_newpass_time' => $dbw->timestampOrNull( $user->mNewpassTime ),
                        'user_email' => $user->mEmail,
                        'user_email_authenticated' => $dbw->timestampOrNull( $user->mEmailAuthenticated ),
                        'user_real_name' => $user->mRealName,
                        'user_token' => strval( $user->mToken ),
                        'user_registration' => $dbw->timestamp( $user->mRegistration ),
                        'user_editcount' => 0,
                );
                foreach ( $params as $name => $value ) {
                        $fields["user_$name"] = $value;
                }
                $dbw->insert( 'user', $fields, __METHOD__, array( 'IGNORE' ) );
                if ( $dbw->affectedRows() ) {
                        $newUser = User::newFromId( $dbw->insertId() );
                } else {
                        $newUser = null;
                }
                return $newUser;
        }

        public function addToDatabase() {
                $this->load();
                $dbw = wfGetDB( DB_MASTER );
                $seqVal = $dbw->nextSequenceValue( 'user_user_id_seq' );
                $dbw->insert( 'user',
                        array(
                                'user_id' => $seqVal,
                                'user_name' => $this->mName,
                                'user_password' => $this->mPassword,
                                'user_newpassword' => $this->mNewpassword,
                                'user_newpass_time' => $dbw->timestampOrNull( $this->mNewpassTime ),
                                'user_email' => $this->mEmail,
                                'user_email_authenticated' => $dbw->timestampOrNull( $this->mEmailAuthenticated ),
                                'user_real_name' => $this->mRealName,
                                'user_token' => strval( $this->mToken ),
                                'user_registration' => $dbw->timestamp( $this->mRegistration ),
                                'user_editcount' => 0,
                        ), __METHOD__
                );
                $this->mId = $dbw->insertId();

                // Clear instance cache other than user table data, which is already accurate
                $this->clearInstanceCache();

                $this->saveOptions();
        }

        public function spreadAnyEditBlock() {
                if ( $this->isLoggedIn() && $this->isBlocked() ) {
                        return $this->spreadBlock();
                }
                return false;
        }

        protected function spreadBlock() {
                wfDebug( __METHOD__ . "()\n" );
                $this->load();
                if ( $this->mId == 0 ) {
                        return false;
                }

                $userblock = Block::newFromTarget( $this->getName() );
                if ( !$userblock ) {
                        return false;
                }

                return (bool)$userblock->doAutoblock( $this->getRequest()->getIP() );
        }

        public function getPageRenderingHash() {
                wfDeprecated( __METHOD__, '1.17' );
                
                global $wgUseDynamicDates, $wgRenderHashAppend, $wgLang, $wgContLang;
                if( $this->mHash ){
                        return $this->mHash;
                }

                // stubthreshold is only included below for completeness,
                // since it disables the parser cache, its value will always
                // be 0 when this function is called by parsercache.

                $confstr =        $this->getOption( 'math' );
                $confstr .= '!' . $this->getStubThreshold();
                if ( $wgUseDynamicDates ) { # This is wrong (bug 24714)
                        $confstr .= '!' . $this->getDatePreference();
                }
                $confstr .= '!' . ( $this->getOption( 'numberheadings' ) ? '1' : '' );
                $confstr .= '!' . $wgLang->getCode();
                $confstr .= '!' . $this->getOption( 'thumbsize' );
                // add in language specific options, if any
                $extra = $wgContLang->getExtraHashOptions();
                $confstr .= $extra;

                // Since the skin could be overloading link(), it should be
                // included here but in practice, none of our skins do that.

                $confstr .= $wgRenderHashAppend;

                // Give a chance for extensions to modify the hash, if they have
                // extra options or other effects on the parser cache.
                wfRunHooks( 'PageRenderingHash', array( &$confstr ) );

                // Make it a valid memcached key fragment
                $confstr = str_replace( ' ', '_', $confstr );
                $this->mHash = $confstr;
                return $confstr;
        }

        public function isBlockedFromCreateAccount() {
                $this->getBlockedStatus();
                if( $this->mBlock && $this->mBlock->prevents( 'createaccount' ) ){
                        return $this->mBlock;
                }

                # bug 13611: if the IP address the user is trying to create an account from is
                # blocked with createaccount disabled, prevent new account creation there even
                # when the user is logged in
                if( $this->mBlockedFromCreateAccount === false ){
                        $this->mBlockedFromCreateAccount = Block::newFromTarget( null, $this->getRequest()->getIP() );
                }
                return $this->mBlockedFromCreateAccount instanceof Block && $this->mBlockedFromCreateAccount->prevents( 'createaccount' )
                        ? $this->mBlockedFromCreateAccount
                        : false;
        }

        public function isBlockedFromEmailuser() {
                $this->getBlockedStatus();
                return $this->mBlock && $this->mBlock->prevents( 'sendemail' );
        }

        function isAllowedToCreateAccount() {
                return $this->isAllowed( 'createaccount' ) && !$this->isBlockedFromCreateAccount();
        }

        public function getUserPage() {
                return Title::makeTitle( NS_USER, $this->getName() );
        }

        public function getTalkPage() {
                $title = $this->getUserPage();
                return $title->getTalkPage();
        }

        public function isNewbie() {
                return !$this->isAllowed( 'autoconfirmed' );
        }

        public function checkPassword( $password ) {
                global $wgAuth, $wgLegacyEncoding;
                $this->load();

                // Even though we stop people from creating passwords that
                // are shorter than this, doesn't mean people wont be able
                // to. Certain authentication plugins do NOT want to save
                // domain passwords in a mysql database, so we should
                // check this (in case $wgAuth->strict() is false).
                if( !$this->isValidPassword( $password ) ) {
                        return false;
                }

                if( $wgAuth->authenticate( $this->getName(), $password ) ) {
                        return true;
                } elseif( $wgAuth->strict() ) {
                        /* Auth plugin doesn't allow local authentication */
                        return false;
                } elseif( $wgAuth->strictUserAuth( $this->getName() ) ) {
                        /* Auth plugin doesn't allow local authentication for this user name */
                        return false;
                }
                if ( self::comparePasswords( $this->mPassword, $password, $this->mId ) ) {
                        return true;
                } elseif ( $wgLegacyEncoding ) {
                        # Some wikis were converted from ISO 8859-1 to UTF-8, the passwords can't be converted
                        # Check for this with iconv
                        $cp1252Password = iconv( 'UTF-8', 'WINDOWS-1252//TRANSLIT', $password );
                        if ( $cp1252Password != $password &&
                                self::comparePasswords( $this->mPassword, $cp1252Password, $this->mId ) )
                        {
                                return true;
                        }
                }
                return false;
        }

        public function checkTemporaryPassword( $plaintext ) {
                global $wgNewPasswordExpiry;

                $this->load();
                if( self::comparePasswords( $this->mNewpassword, $plaintext, $this->getId() ) ) {
                        if ( is_null( $this->mNewpassTime ) ) {
                                return true;
                        }
                        $expiry = wfTimestamp( TS_UNIX, $this->mNewpassTime ) + $wgNewPasswordExpiry;
                        return ( time() < $expiry );
                } else {
                        return false;
                }
        }

        public function editToken( $salt = '', $request = null ) {
                wfDeprecated( __METHOD__, '1.19' );
                return $this->getEditToken( $salt, $request );
        }

        public function getEditToken( $salt = '', $request = null ) {
                if ( $request == null ) {
                        $request = $this->getRequest();
                }

                if ( $this->isAnon() ) {
                        return EDIT_TOKEN_SUFFIX;
                } else {
                        $token = $request->getSessionData( 'wsEditToken' );
                        if ( $token === null ) {
                                $token = MWCryptRand::generateHex( 32 );
                                $request->setSessionData( 'wsEditToken', $token );
                        }
                        if( is_array( $salt ) ) {
                                $salt = implode( '|', $salt );
                        }
                        return md5( $token . $salt ) . EDIT_TOKEN_SUFFIX;
                }
        }

        public static function generateToken( $salt = '' ) {
                return MWCryptRand::generateHex( 32 );
        }

        public function matchEditToken( $val, $salt = '', $request = null ) {
                $sessionToken = $this->getEditToken( $salt, $request );
                if ( $val != $sessionToken ) {
                        wfDebug( "User::matchEditToken: broken session data\n" );
                }
                return $val == $sessionToken;
        }

        public function matchEditTokenNoSuffix( $val, $salt = '', $request = null ) {
                $sessionToken = $this->getEditToken( $salt, $request );
                return substr( $sessionToken, 0, 32 ) == substr( $val, 0, 32 );
        }

        public function sendConfirmationMail( $type = 'created' ) {
                global $wgLang;
                $expiration = null; // gets passed-by-ref and defined in next line.
                $token = $this->confirmationToken( $expiration );
                $url = $this->confirmationTokenUrl( $token );
                $invalidateURL = $this->invalidationTokenUrl( $token );
                $this->saveSettings();

                if ( $type == 'created' || $type === false ) {
                        $message = 'confirmemail_body';
                } elseif ( $type === true ) {
                        $message = 'confirmemail_body_changed';
                } else {
                        $message = 'confirmemail_body_' . $type;
                }

                return $this->sendMail( wfMsg( 'confirmemail_subject' ),
                        wfMsg( $message,
                                $this->getRequest()->getIP(),
                                $this->getName(),
                                $url,
                                $wgLang->timeanddate( $expiration, false ),
                                $invalidateURL,
                                $wgLang->date( $expiration, false ),
                                $wgLang->time( $expiration, false ) ) );
        }

        public function sendMail( $subject, $body, $from = null, $replyto = null ) {
                if( is_null( $from ) ) {
                        global $wgPasswordSender, $wgPasswordSenderName;
                        $sender = new MailAddress( $wgPasswordSender, $wgPasswordSenderName );
                } else {
                        $sender = new MailAddress( $from );
                }

                $to = new MailAddress( $this );
                return UserMailer::send( $to, $sender, $subject, $body, $replyto );
        }

        private function confirmationToken( &$expiration ) {
                global $wgUserEmailConfirmationTokenExpiry;
                $now = time();
                $expires = $now + $wgUserEmailConfirmationTokenExpiry;
                $expiration = wfTimestamp( TS_MW, $expires );
                $this->load();
                $token = MWCryptRand::generateHex( 32 );
                $hash = md5( $token );
                $this->mEmailToken = $hash;
                $this->mEmailTokenExpires = $expiration;
                return $token;
        }

        private function confirmationTokenUrl( $token ) {
                return $this->getTokenUrl( 'ConfirmEmail', $token );
        }

        private function invalidationTokenUrl( $token ) {
                return $this->getTokenUrl( 'Invalidateemail', $token );
        }

        protected function getTokenUrl( $page, $token ) {
                // Hack to bypass localization of 'Special:'
                $title = Title::makeTitle( NS_MAIN, "Special:$page/$token" );
                return $title->getCanonicalUrl();
        }

        public function confirmEmail() {
                $this->setEmailAuthenticationTimestamp( wfTimestampNow() );
                wfRunHooks( 'ConfirmEmailComplete', array( $this ) );
                return true;
        }

        function invalidateEmail() {
                $this->load();
                $this->mEmailToken = null;
                $this->mEmailTokenExpires = null;
                $this->setEmailAuthenticationTimestamp( null );
                wfRunHooks( 'InvalidateEmailComplete', array( $this ) );
                return true;
        }

        function setEmailAuthenticationTimestamp( $timestamp ) {
                $this->load();
                $this->mEmailAuthenticated = $timestamp;
                wfRunHooks( 'UserSetEmailAuthenticationTimestamp', array( $this, &$this->mEmailAuthenticated ) );
        }

        public function canSendEmail() {
                global $wgEnableEmail, $wgEnableUserEmail;
                if( !$wgEnableEmail || !$wgEnableUserEmail || !$this->isAllowed( 'sendemail' ) ) {
                        return false;
                }
                $canSend = $this->isEmailConfirmed();
                wfRunHooks( 'UserCanSendEmail', array( &$this, &$canSend ) );
                return $canSend;
        }

        public function canReceiveEmail() {
                return $this->isEmailConfirmed() && !$this->getOption( 'disablemail' );
        }

        public function isEmailConfirmed() {
                global $wgEmailAuthentication;
                $this->load();
                $confirmed = true;
                if( wfRunHooks( 'EmailConfirmed', array( &$this, &$confirmed ) ) ) {
                        if( $this->isAnon() ) {
                                return false;
                        }
                        if( !Sanitizer::validateEmail( $this->mEmail ) ) {
                                return false;
                        }
                        if( $wgEmailAuthentication && !$this->getEmailAuthenticationTimestamp() ) {
                                return false;
                        }
                        return true;
                } else {
                        return $confirmed;
                }
        }

        public function isEmailConfirmationPending() {
                global $wgEmailAuthentication;
                return $wgEmailAuthentication &&
                        !$this->isEmailConfirmed() &&
                        $this->mEmailToken &&
                        $this->mEmailTokenExpires > wfTimestamp();
        }

        public function getRegistration() {
                if ( $this->isAnon() ) {
                        return false;
                }
                $this->load();
                return $this->mRegistration;
        }

        public function getFirstEditTimestamp() {
                if( $this->getId() == 0 ) {
                        return false; // anons
                }
                $dbr = wfGetDB( DB_SLAVE );
                $time = $dbr->selectField( 'revision', 'rev_timestamp',
                        array( 'rev_user' => $this->getId() ),
                        __METHOD__,
                        array( 'ORDER BY' => 'rev_timestamp ASC' )
                );
                if( !$time ) {
                        return false; // no edits
                }
                return wfTimestamp( TS_MW, $time );
        }

        public static function getGroupPermissions( $groups ) {
                global $wgGroupPermissions, $wgRevokePermissions;
                $rights = array();
                // grant every granted permission first
                foreach( $groups as $group ) {
                        if( isset( $wgGroupPermissions[$group] ) ) {
                                $rights = array_merge( $rights,
                                        // array_filter removes empty items
                                        array_keys( array_filter( $wgGroupPermissions[$group] ) ) );
                        }
                }
                // now revoke the revoked permissions
                foreach( $groups as $group ) {
                        if( isset( $wgRevokePermissions[$group] ) ) {
                                $rights = array_diff( $rights,
                                        array_keys( array_filter( $wgRevokePermissions[$group] ) ) );
                        }
                }
                return array_unique( $rights );
        }

        public static function getGroupsWithPermission( $role ) {
                global $wgGroupPermissions;
                $allowedGroups = array();
                foreach ( $wgGroupPermissions as $group => $rights ) {
                        if ( isset( $rights[$role] ) && $rights[$role] ) {
                                $allowedGroups[] = $group;
                        }
                }
                return $allowedGroups;
        }

        public static function getGroupName( $group ) {
                $msg = wfMessage( "group-$group" );
                return $msg->isBlank() ? $group : $msg->text();
        }

        public static function getGroupMember( $group, $username = '#' ) {
                $msg = wfMessage( "group-$group-member", $username );
                return $msg->isBlank() ? $group : $msg->text();
        }

        public static function getAllGroups() {
                global $wgGroupPermissions, $wgRevokePermissions;
                return array_diff(
                        array_merge( array_keys( $wgGroupPermissions ), array_keys( $wgRevokePermissions ) ),
                        self::getImplicitGroups()
                );
        }

        public static function getAllRights() {
                if ( self::$mAllRights === false ) {
                        global $wgAvailableRights;
                        if ( count( $wgAvailableRights ) ) {
                                self::$mAllRights = array_unique( array_merge( self::$mCoreRights, $wgAvailableRights ) );
                        } else {
                                self::$mAllRights = self::$mCoreRights;
                        }
                        wfRunHooks( 'UserGetAllRights', array( &self::$mAllRights ) );
                }
                return self::$mAllRights;
        }

        public static function getImplicitGroups() {
                global $wgImplicitGroups;
                $groups = $wgImplicitGroups;
                wfRunHooks( 'UserGetImplicitGroups', array( &$groups ) );       #deprecated, use $wgImplictGroups instead
                return $groups;
        }

        public static function getGroupPage( $group ) {
                $msg = wfMessage( 'grouppage-' . $group )->inContentLanguage();
                if( $msg->exists() ) {
                        $title = Title::newFromText( $msg->text() );
                        if( is_object( $title ) )
                                return $title;
                }
                return false;
        }

        public static function makeGroupLinkHTML( $group, $text = '' ) {
                if( $text == '' ) {
                        $text = self::getGroupName( $group );
                }
                $title = self::getGroupPage( $group );
                if( $title ) {
                        return Linker::link( $title, htmlspecialchars( $text ) );
                } else {
                        return $text;
                }
        }

        public static function makeGroupLinkWiki( $group, $text = '' ) {
                if( $text == '' ) {
                        $text = self::getGroupName( $group );
                }
                $title = self::getGroupPage( $group );
                if( $title ) {
                        $page = $title->getPrefixedText();
                        return "[[$page|$text]]";
                } else {
                        return $text;
                }
        }

        public static function changeableByGroup( $group ) {
                global $wgAddGroups, $wgRemoveGroups, $wgGroupsAddToSelf, $wgGroupsRemoveFromSelf;

                $groups = array( 'add' => array(), 'remove' => array(), 'add-self' => array(), 'remove-self' => array() );
                if( empty( $wgAddGroups[$group] ) ) {
                        // Don't add anything to $groups
                } elseif( $wgAddGroups[$group] === true ) {
                        // You get everything
                        $groups['add'] = self::getAllGroups();
                } elseif( is_array( $wgAddGroups[$group] ) ) {
                        $groups['add'] = $wgAddGroups[$group];
                }

                // Same thing for remove
                if( empty( $wgRemoveGroups[$group] ) ) {
                } elseif( $wgRemoveGroups[$group] === true ) {
                        $groups['remove'] = self::getAllGroups();
                } elseif( is_array( $wgRemoveGroups[$group] ) ) {
                        $groups['remove'] = $wgRemoveGroups[$group];
                }

                // Re-map numeric keys of AddToSelf/RemoveFromSelf to the 'user' key for backwards compatibility
                if( empty( $wgGroupsAddToSelf['user']) || $wgGroupsAddToSelf['user'] !== true ) {
                        foreach( $wgGroupsAddToSelf as $key => $value ) {
                                if( is_int( $key ) ) {
                                        $wgGroupsAddToSelf['user'][] = $value;
                                }
                        }
                }

                if( empty( $wgGroupsRemoveFromSelf['user']) || $wgGroupsRemoveFromSelf['user'] !== true ) {
                        foreach( $wgGroupsRemoveFromSelf as $key => $value ) {
                                if( is_int( $key ) ) {
                                        $wgGroupsRemoveFromSelf['user'][] = $value;
                                }
                        }
                }

                // Now figure out what groups the user can add to him/herself
                if( empty( $wgGroupsAddToSelf[$group] ) ) {
                } elseif( $wgGroupsAddToSelf[$group] === true ) {
                        // No idea WHY this would be used, but it's there
                        $groups['add-self'] = User::getAllGroups();
                } elseif( is_array( $wgGroupsAddToSelf[$group] ) ) {
                        $groups['add-self'] = $wgGroupsAddToSelf[$group];
                }

                if( empty( $wgGroupsRemoveFromSelf[$group] ) ) {
                } elseif( $wgGroupsRemoveFromSelf[$group] === true ) {
                        $groups['remove-self'] = User::getAllGroups();
                } elseif( is_array( $wgGroupsRemoveFromSelf[$group] ) ) {
                        $groups['remove-self'] = $wgGroupsRemoveFromSelf[$group];
                }

                return $groups;
        }

        public function changeableGroups() {
                if( $this->isAllowed( 'userrights' ) ) {
                        // This group gives the right to modify everything (reverse-
                        // compatibility with old "userrights lets you change
                        // everything")
                        // Using array_merge to make the groups reindexed
                        $all = array_merge( User::getAllGroups() );
                        return array(
                                'add' => $all,
                                'remove' => $all,
                                'add-self' => array(),
                                'remove-self' => array()
                        );
                }

                // Okay, it's not so simple, we will have to go through the arrays
                $groups = array(
                        'add' => array(),
                        'remove' => array(),
                        'add-self' => array(),
                        'remove-self' => array()
                );
                $addergroups = $this->getEffectiveGroups();

                foreach( $addergroups as $addergroup ) {
                        $groups = array_merge_recursive(
                                $groups, $this->changeableByGroup( $addergroup )
                        );
                        $groups['add']    = array_unique( $groups['add'] );
                        $groups['remove'] = array_unique( $groups['remove'] );
                        $groups['add-self'] = array_unique( $groups['add-self'] );
                        $groups['remove-self'] = array_unique( $groups['remove-self'] );
                }
                return $groups;
        }

        public function incEditCount() {
                if( !$this->isAnon() ) {
                        $dbw = wfGetDB( DB_MASTER );
                        $dbw->update( 'user',
                                array( 'user_editcount=user_editcount+1' ),
                                array( 'user_id' => $this->getId() ),
                                __METHOD__ );

                        // Lazy initialization check...
                        if( $dbw->affectedRows() == 0 ) {
                                // Pull from a slave to be less cruel to servers
                                // Accuracy isn't the point anyway here
                                $dbr = wfGetDB( DB_SLAVE );
                                $count = $dbr->selectField( 'revision',
                                        'COUNT(rev_user)',
                                        array( 'rev_user' => $this->getId() ),
                                        __METHOD__ );

                                // Now here's a goddamn hack...
                                if( $dbr !== $dbw ) {
                                        // If we actually have a slave server, the count is
                                        // at least one behind because the current transaction
                                        // has not been committed and replicated.
                                        $count++;
                                } else {
                                        // But if DB_SLAVE is selecting the master, then the
                                        // count we just read includes the revision that was
                                        // just added in the working transaction.
                                }

                                $dbw->update( 'user',
                                        array( 'user_editcount' => $count ),
                                        array( 'user_id' => $this->getId() ),
                                        __METHOD__ );
                        }
                }
                // edit count in user cache too
                $this->invalidateCache();
        }

        public static function getRightDescription( $right ) {
                $key = "right-$right";
                $msg = wfMessage( $key );
                return $msg->isBlank() ? $right : $msg->text();
        }

        public static function oldCrypt( $password, $userId ) {
                global $wgPasswordSalt;
                if ( $wgPasswordSalt ) {
                        return md5( $userId . '-' . md5( $password ) );
                } else {
                        return md5( $password );
                }
        }

        public static function crypt( $password, $salt = false ) {
                global $wgPasswordSalt;

                $hash = '';
                if( !wfRunHooks( 'UserCryptPassword', array( &$password, &$salt, &$wgPasswordSalt, &$hash ) ) ) {
                        return $hash;
                }

                if( $wgPasswordSalt ) {
                        if ( $salt === false ) {
                                $salt = MWCryptRand::generateHex( 8 );
                        }
                        return ':B:' . $salt . ':' . md5( $salt . '-' . md5( $password ) );
                } else {
                        return ':A:' . md5( $password );
                }
        }

        public static function comparePasswords( $hash, $password, $userId = false ) {
                $type = substr( $hash, 0, 3 );

                $result = false;
                if( !wfRunHooks( 'UserComparePasswords', array( &$hash, &$password, &$userId, &$result ) ) ) {
                        return $result;
                }

                if ( $type == ':A:' ) {
                        # Unsalted
                        return md5( $password ) === substr( $hash, 3 );
                } elseif ( $type == ':B:' ) {
                        # Salted
                        list( $salt, $realHash ) = explode( ':', substr( $hash, 3 ), 2 );
                        return md5( $salt.'-'.md5( $password ) ) === $realHash;
                } else {
                        # Old-style
                        return self::oldCrypt( $password, $userId ) === $hash;
                }
        }

        public function addNewUserLogEntry( $byEmail = false, $reason = '' ) {
                global $wgUser, $wgContLang, $wgNewUserLog;
                if( empty( $wgNewUserLog ) ) {
                        return true; // disabled
                }

                if( $this->getName() == $wgUser->getName() ) {
                        $action = 'create';
                } else {
                        $action = 'create2';
                        if ( $byEmail ) {
                                if ( $reason === '' ) {
                                        $reason = wfMsgForContent( 'newuserlog-byemail' );
                                } else {
                                        $reason = $wgContLang->commaList( array(
                                                $reason, wfMsgForContent( 'newuserlog-byemail' ) ) );
                                }
                        }
                }
                $log = new LogPage( 'newusers' );
                return (int)$log->addEntry(
                        $action,
                        $this->getUserPage(),
                        $reason,
                        array( $this->getId() )
                );
        }

        public function addNewUserLogEntryAutoCreate() {
                global $wgNewUserLog;
                if( !$wgNewUserLog ) {
                        return true; // disabled
                }
                $log = new LogPage( 'newusers', false );
                $log->addEntry( 'autocreate', $this->getUserPage(), '', array( $this->getId() ) );
                return true;
        }

        protected function loadOptions() {
                $this->load();
                if ( $this->mOptionsLoaded || !$this->getId() )
                        return;

                $this->mOptions = self::getDefaultOptions();

                // Maybe load from the object
                if ( !is_null( $this->mOptionOverrides ) ) {
                        wfDebug( "User: loading options for user " . $this->getId() . " from override cache.\n" );
                        foreach( $this->mOptionOverrides as $key => $value ) {
                                $this->mOptions[$key] = $value;
                        }
                } else {
                        wfDebug( "User: loading options for user " . $this->getId() . " from database.\n" );
                        // Load from database
                        $dbr = wfGetDB( DB_SLAVE );

                        $res = $dbr->select(
                                'user_properties',
                                '*',
                                array( 'up_user' => $this->getId() ),
                                __METHOD__
                        );

                        $this->mOptionOverrides = array();
                        foreach ( $res as $row ) {
                                $this->mOptionOverrides[$row->up_property] = $row->up_value;
                                $this->mOptions[$row->up_property] = $row->up_value;
                        }
                }

                $this->mOptionsLoaded = true;

                wfRunHooks( 'UserLoadOptions', array( $this, &$this->mOptions ) );
        }

        protected function saveOptions() {
                global $wgAllowPrefChange;

                $extuser = ExternalUser::newFromUser( $this );

                $this->loadOptions();
                $dbw = wfGetDB( DB_MASTER );

                $insert_rows = array();

                $saveOptions = $this->mOptions;

                // Allow hooks to abort, for instance to save to a global profile.
                // Reset options to default state before saving.
                if( !wfRunHooks( 'UserSaveOptions', array( $this, &$saveOptions ) ) ) {
                        return;
                }

                foreach( $saveOptions as $key => $value ) {
                        # Don't bother storing default values
                        if ( ( is_null( self::getDefaultOption( $key ) ) &&
                                        !( $value === false || is_null($value) ) ) ||
                                        $value != self::getDefaultOption( $key ) ) {
                                $insert_rows[] = array(
                                                'up_user' => $this->getId(),
                                                'up_property' => $key,
                                                'up_value' => $value,
                                        );
                        }
                        if ( $extuser && isset( $wgAllowPrefChange[$key] ) ) {
                                switch ( $wgAllowPrefChange[$key] ) {
                                        case 'local':
                                        case 'message':
                                                break;
                                        case 'semiglobal':
                                        case 'global':
                                                $extuser->setPref( $key, $value );
                                }
                        }
                }

                $dbw->delete( 'user_properties', array( 'up_user' => $this->getId() ), __METHOD__ );
                $dbw->insert( 'user_properties', $insert_rows, __METHOD__ );
        }

        public static function passwordChangeInputAttribs() {
                global $wgMinimalPasswordLength;

                if ( $wgMinimalPasswordLength == 0 ) {
                        return array();
                }

                # Note that the pattern requirement will always be satisfied if the
                # input is empty, so we need required in all cases.
                #
                # @todo FIXME: Bug 23769: This needs to not claim the password is required
                # if e-mail confirmation is being used.  Since HTML5 input validation
                # is b0rked anyway in some browsers, just return nothing.  When it's
                # re-enabled, fix this code to not output required for e-mail
                # registration.
                #$ret = array( 'required' );
                $ret = array();

                # We can't actually do this right now, because Opera 9.6 will print out
                # the entered password visibly in its error message!  When other
                # browsers add support for this attribute, or Opera fixes its support,
                # we can add support with a version check to avoid doing this on Opera
                # versions where it will be a problem.  Reported to Opera as
                # DSK-262266, but they don't have a public bug tracker for us to follow.
                /*
                if ( $wgMinimalPasswordLength > 1 ) {
                        $ret['pattern'] = '.{' . intval( $wgMinimalPasswordLength ) . ',}';
                        $ret['title'] = wfMsgExt( 'passwordtooshort', 'parsemag',
                                $wgMinimalPasswordLength );
                }
                */

                return $ret;
        }
}