* Set default disabled values for DjVu render options
[lhc/web/wiklou.git] / includes / SpecialUserlogin.php
index 416703e..53fc94c 100644 (file)
@@ -14,7 +14,7 @@ function wfSpecialUserlogin() {
        if( !$wgCommandLineMode && !isset( $_COOKIE[session_name()] )  ) {
                User::SetupSession();
        }
-       
+
        $form = new LoginForm( $wgRequest );
        $form->execute();
 }
@@ -24,11 +24,20 @@ function wfSpecialUserlogin() {
  * @package MediaWiki
  * @subpackage SpecialPage
  */
+
+define("AuthSuccess", 0);
+define("AuthNoName", 1);
+define("AuthIllegal", 2);
+define("AuthWrongPluginPass", 3);
+define("AuthNotExists", 4);
+define("AuthWrongPass", 5);
+define("AuthEmptyPass", 6);
+
 class LoginForm {
-       var $mName, $mPassword, $mRetype, $mReturnto, $mCookieCheck, $mPosted;
+       var $mName, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
        var $mAction, $mCreateaccount, $mCreateaccountMail, $mMailmypassword;
-       var $mLoginattempt, $mRemember, $mEmail, $mDomain;
-       
+       var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
+
        /**
         * Constructor
         * @param webrequest $request A webrequest object passed by reference
@@ -42,7 +51,7 @@ class LoginForm {
                $this->mPassword = $request->getText( 'wpPassword' );
                $this->mRetype = $request->getText( 'wpRetype' );
                $this->mDomain = $request->getText( 'wpDomain' );
-               $this->mReturnto = $request->getVal( 'returnto' );
+               $this->mReturnTo = $request->getVal( 'returnto' );
                $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
                $this->mPosted = $request->wasPosted();
                $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
@@ -53,7 +62,8 @@ class LoginForm {
                $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
                $this->mAction = $request->getVal( 'action' );
                $this->mRemember = $request->getCheck( 'wpRemember' );
-               
+               $this->mLanguage = $request->getText( 'uselang' );
+
                if( $wgEnableEmail ) {
                        $this->mEmail = $request->getText( 'wpEmail' );
                } else {
@@ -64,15 +74,15 @@ class LoginForm {
                } else {
                    $this->mRealName = '';
                }
-               
+
                if( !$wgAuth->validDomain( $this->mDomain ) ) {
                        $this->mDomain = 'invaliddomain';
                }
                $wgAuth->setDomain( $this->mDomain );
+
                # When switching accounts, it sucks to get automatically logged out
-               if( $this->mReturnto == $wgLang->specialPage( 'Userlogout' ) ) {
-                       $this->mReturnto = '';
+               if( $this->mReturnTo == $wgLang->specialPage( 'Userlogout' ) ) {
+                       $this->mReturnTo = '';
                }
        }
 
@@ -95,11 +105,11 @@ class LoginForm {
        }
 
        /**
-        * @access private
+        * @private
         */
        function addNewAccountMailPassword() {
                global $wgOut;
-               
+
                if ('' == $this->mEmail) {
                        $this->mainLoginForm( wfMsg( 'noemail', htmlspecialchars( $this->mName ) ) );
                        return;
@@ -113,11 +123,13 @@ class LoginForm {
 
                $u->saveSettings();
                $result = $this->mailPasswordInternal($u);
-               
+
+               wfRunHooks( 'AddNewAccount', array( $u ) );
+
                $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
                $wgOut->setRobotpolicy( 'noindex,nofollow' );
                $wgOut->setArticleRelated( false );
-       
+
                if( WikiError::isError( $result ) ) {
                        $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
                } else {
@@ -129,42 +141,61 @@ class LoginForm {
 
 
        /**
-        * @access private
+        * @private
         */
        function addNewAccount() {
-               global $wgUser, $wgOut, $wgEmailAuthentication;
-
+               global $wgUser, $wgEmailAuthentication;
+               
+               # Create the account and abort if there's a problem doing so
                $u = $this->addNewAccountInternal();
-
-               if ($u == NULL) {
+               if( $u == NULL )
                        return;
-               }
-
-               $wgUser = $u;
-               $wgUser->setCookies();
-
-               $wgUser->saveSettings();
-               if( $wgEmailAuthentication && $wgUser->isValidEmailAddr( $wgUser->getEmail() ) ) {
-                       $wgUser->sendConfirmationMail();
-               }
-
-               wfRunHooks( 'AddNewAccount' );
-
-               if( $this->hasSessionCookie() ) {
-                       return $this->successfulLogin( wfMsg( 'welcomecreation', $wgUser->getName() ) );
+                       
+               # If we showed up language selection links, and one was in use, be
+               # smart (and sensible) and save that language as the user's preference
+               global $wgLoginLanguageSelector;
+               if( $wgLoginLanguageSelector && $this->mLanguage )
+                       $u->setOption( 'language', $this->mLanguage );
+               
+               # Save user settings and send out an email authentication message if needed
+               $u->saveSettings();
+               if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) )
+                       $u->sendConfirmationMail();
+                       
+               # If not logged in, assume the new account as the current one and set session cookies
+               # then show a "welcome" message or a "need cookies" message as needed
+               if( $wgUser->isAnon() ) {
+                       $wgUser = $u;
+                       $wgUser->setCookies();
+                       wfRunHooks( 'AddNewAccount', array( $wgUser ) );
+                       if( $this->hasSessionCookie() ) {
+                               return $this->successfulLogin( wfMsg( 'welcomecreation', $wgUser->getName() ), false );
+                       } else {
+                               return $this->cookieRedirectCheck( 'new' );
+                       }
                } else {
-                       return $this->cookieRedirectCheck( 'new' );
+                       # Confirm that the account was created
+                       global $wgOut;
+                       $skin = $wgUser->getSkin();
+                       $self = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
+                       $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
+                       $wgOut->setArticleRelated( false );
+                       $wgOut->setRobotPolicy( 'noindex,nofollow' );
+                       $wgOut->addHtml( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
+                       $wgOut->returnToMain( $self->getPrefixedText() );
+                       wfRunHooks( 'AddNewAccount', array( $u ) );
+                       return true;
                }
        }
 
        /**
-        * @access private
+        * @private
         */
        function addNewAccountInternal() {
                global $wgUser, $wgOut;
-               global $wgUseLatin1, $wgEnableSorbs, $wgProxyWhitelist;
+               global $wgEnableSorbs, $wgProxyWhitelist;
                global $wgMemc, $wgAccountCreationThrottle, $wgDBname;
-               global $wgAuth, $wgMinimalPasswordLength;
+               global $wgAuth, $wgMinimalPasswordLength, $wgReservedUsernames;
 
                // If the user passes an invalid domain, something is fishy
                if( !$wgAuth->validDomain( $this->mDomain ) ) {
@@ -185,42 +216,41 @@ class LoginForm {
                        }
                }
 
+               if ( wfReadOnly() ) {
+                       $wgOut->readOnlyPage();
+                       return false;
+               }
+
                if (!$wgUser->isAllowedToCreateAccount()) {
                        $this->userNotPrivilegedMessage();
                        return false;
                }
 
                $ip = wfGetIP();
-               if ( $wgEnableSorbs && !in_array( $ip, $wgProxyWhitelist ) && 
-                 $wgUser->inSorbsBlacklist( $ip ) ) 
+               if ( $wgEnableSorbs && !in_array( $ip, $wgProxyWhitelist ) &&
+                 $wgUser->inSorbsBlacklist( $ip ) )
                {
                        $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
                        return;
                }
 
-
-               if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
-                       $this->mainLoginForm( wfMsg( 'badretype' ) );
-                       return false;
-               }
-               
                $name = trim( $this->mName );
                $u = User::newFromName( $name );
-               if ( is_null( $u ) ) {
+               if ( is_null( $u ) || in_array( $u->getName(), $wgReservedUsernames ) ) {
                        $this->mainLoginForm( wfMsg( 'noname' ) );
                        return false;
                }
-               
-               if ( wfReadOnly() ) {
-                       $wgOut->readOnlyPage();
-                       return false;
-               }
-               
+
                if ( 0 != $u->idForName() ) {
                        $this->mainLoginForm( wfMsg( 'userexists' ) );
                        return false;
                }
 
+               if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
+                       $this->mainLoginForm( wfMsg( 'badretype' ) );
+                       return false;
+               }
+
                if ( !$wgUser->isValidPassword( $this->mPassword ) ) {
                        $this->mainLoginForm( wfMsg( 'passwordtooshort', $wgMinimalPasswordLength ) );
                        return false;
@@ -238,6 +268,14 @@ class LoginForm {
                        }
                }
 
+               $abortError = '';
+               if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
+                       // Hook point to add extra creation throttles and blocks
+                       wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
+                       $this->mainLoginForm( $abortError );
+                       return false;
+               }
+
                if( !$wgAuth->addUser( $u, $this->mPassword ) ) {
                        $this->mainLoginForm( wfMsg( 'externaldberror' ) );
                        return false;
@@ -249,14 +287,14 @@ class LoginForm {
 
                return $this->initUser( $u );
        }
-       
+
        /**
         * Actually add a user to the database.
         * Give it a User object that has been initialised with a name.
         *
-        * @param User $u
-        * @return User
-        * @access private
+        * @param $u User object.
+        * @return User object.
+        * @private
         */
        function &initUser( &$u ) {
                $u->addToDatabase();
@@ -264,30 +302,28 @@ class LoginForm {
                $u->setEmail( $this->mEmail );
                $u->setRealName( $this->mRealName );
                $u->setToken();
-               
+
                global $wgAuth;
                $wgAuth->initUser( $u );
 
                $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
-               
+
                return $u;
        }
 
        /**
-        * @access private
+        * @private
         */
-       function processLogin() {
-               global $wgUser;
-               global $wgAuth;
-
+       
+       function authenticateUserData()
+       {
+               global $wgUser, $wgAuth, $wgReservedUsernames;
                if ( '' == $this->mName ) {
-                       $this->mainLoginForm( wfMsg( 'noname' ) );
-                       return;
+                       return AuthNoName;
                }
                $u = User::newFromName( $this->mName );
-               if( is_null( $u ) ) {
-                       $this->mainLoginForm( wfMsg( 'noname' ) );
-                       return;
+               if( is_null( $u ) || in_array( $u->getName(), $wgReservedUsernames ) ) {
+                       return AuthIllegal;
                }
                if ( 0 == $u->getID() ) {
                        global $wgAuth;
@@ -300,52 +336,78 @@ class LoginForm {
                                if ( $wgAuth->authenticate( $u->getName(), $this->mPassword ) ) {
                                        $u =& $this->initUser( $u );
                                } else {
-                                       $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
-                                       return;
+                                       return AuthPluginPass;
                                }
                        } else {
-                               $this->mainLoginForm( wfMsg( 'nosuchuser', $u->getName() ) );
-                               return;
+                               return AuthNotExists;
                        }
                } else {
                        $u->loadFromDatabase();
                }
 
                if (!$u->checkPassword( $this->mPassword )) {
-                       $this->mainLoginForm( wfMsg( $this->mPassword == '' ? 'wrongpasswordempty' : 'wrongpassword' ) );
-                       return;
+                       return '' == $this->mPassword ? AuthEmptyPass : AuthWrongPass;
                }
-
-               # We've verified now, update the real record
-               #
-               if ( $this->mRemember ) {
-                       $r = 1;
-               } else {
-                       $r = 0;
+               else
+               {       
+                       $wgAuth->updateUser( $u );
+                       $wgUser = $u;
+                       return AuthSuccess;
                }
-               $u->setOption( 'rememberpassword', $r );
-
-               $wgAuth->updateUser( $u );
+       }
+       
+       function processLogin() {
+               global $wgUser, $wgAuth, $wgReservedUsernames;
 
-               $wgUser = $u;
-               $wgUser->setCookies();
+               switch ($this->authenticateUserData())
+               {
+                       case (AuthSuccess):
+                               # We've verified now, update the real record
+                               #
+                               $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
+                               $wgUser->setCookies();
+                               $wgUser->saveSettings();
+
+                               if( $this->hasSessionCookie() ) {
+                                       return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
+                               } else {
+                                       return $this->cookieRedirectCheck( 'login' );
+                               }
+                               break;
 
-               $wgUser->saveSettings();
-               
-               if( $this->hasSessionCookie() ) {
-                       return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
-               } else {
-                       return $this->cookieRedirectCheck( 'login' );
+                       case (AuthNoName):
+                       case (AuthIllegal):
+                               $this->mainLoginForm( wfMsg( 'noname' ) );
+                               break;
+                       case (AuthWrongPluginPass):
+                               $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
+                               break;
+                       case (AuthNotExists):
+                               $this->mainLoginForm( wfMsg( 'nosuchuser', htmlspecialchars( $this->mName ) ) );
+                               break;
+                       case (AuthWrongPass):
+                               $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
+                               break;
+                       case (AuthEmptyPass):
+                               $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
+                               break;
+                       default:
+                               wfDebugDieBacktrace( "Unhandled case value" );
                }
        }
 
        /**
-        * @access private
+        * @private
         */
        function mailPassword() {
-               global $wgUser, $wgDeferredUpdateList, $wgOutputEncoding;
-               global $wgCookiePath, $wgCookieDomain, $wgDBname;
-
+               global $wgUser, $wgOut;
+               
+               # Check against the rate limiter
+               if( $wgUser->pingLimiter( 'mailpassword' ) ) {
+                       $wgOut->rateLimited();
+                       return;
+               }
+       
                if ( '' == $this->mName ) {
                        $this->mainLoginForm( wfMsg( 'noname' ) );
                        return;
@@ -366,34 +428,34 @@ class LoginForm {
                if( WikiError::isError( $result ) ) {
                        $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
                } else {
-                       $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ) );
+                       $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
                }
        }
 
 
        /**
         * @return mixed true on success, WikiError on failure
-        * @access private
+        * @private
         */
        function mailPasswordInternal( $u ) {
-               global $wgPasswordSender, $wgDBname;
-               global $wgCookiePath, $wgCookieDomain;
+               global $wgCookiePath, $wgCookieDomain, $wgCookiePrefix, $wgCookieSecure;
+               global $wgServer, $wgScript;
 
                if ( '' == $u->getEmail() ) {
-                       return wfMsg( 'noemail', $u->getName() );
+                       return new WikiError( wfMsg( 'noemail', $u->getName() ) );
                }
 
                $np = $u->randomPassword();
                $u->setNewpassword( $np );
 
-               setcookie( "{$wgDBname}Token", '', time() - 3600, $wgCookiePath, $wgCookieDomain );
+               setcookie( "{$wgCookiePrefix}Token", '', time() - 3600, $wgCookiePath, $wgCookieDomain, $wgCookieSecure );
 
                $u->saveSettings();
 
                $ip = wfGetIP();
                if ( '' == $ip ) { $ip = '(Unknown)'; }
 
-               $m = wfMsg( 'passwordremindertext', $ip, $u->getName(), $np );
+               $m = wfMsg( 'passwordremindertext', $ip, $u->getName(), $np, $wgServer . $wgScript );
 
                $result = $u->sendMail( wfMsg( 'passwordremindertitle' ), $m );
                return $result;
@@ -401,81 +463,123 @@ class LoginForm {
 
 
        /**
-        * @param string $msg Message that will be shown on success.
-        * @access private
+        * @param string $msg Message that will be shown on success
+        * @param bool $auto Toggle auto-redirect to main page; default true
+        * @private
         */
-       function successfulLogin( $msg ) {
+       function successfulLogin( $msg, $auto = true ) {
                global $wgUser;
                global $wgOut;
 
                # Run any hooks; ignore results
-               
+
                wfRunHooks('UserLoginComplete', array(&$wgUser));
-               
+
                $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
                $wgOut->setRobotpolicy( 'noindex,nofollow' );
                $wgOut->setArticleRelated( false );
                $wgOut->addWikiText( $msg );
-               $wgOut->returnToMain();
+               if ( !empty( $this->mReturnTo ) ) {
+                       $wgOut->returnToMain( $auto, $this->mReturnTo );
+               } else {
+                       $wgOut->returnToMain( $auto );
+               }
        }
 
        /** */
        function userNotPrivilegedMessage() {
                global $wgOut;
-               
+
                $wgOut->setPageTitle( wfMsg( 'whitelistacctitle' ) );
                $wgOut->setRobotpolicy( 'noindex,nofollow' );
                $wgOut->setArticleRelated( false );
 
                $wgOut->addWikiText( wfMsg( 'whitelistacctext' ) );
+
+               $wgOut->returnToMain( false );
+       }
+
+       /** */
+       function userBlockedMessage() {
+               global $wgOut;
+
+               # Let's be nice about this, it's likely that this feature will be used
+               # for blocking large numbers of innocent people, e.g. range blocks on 
+               # schools. Don't blame it on the user. There's a small chance that it 
+               # really is the user's fault, i.e. the username is blocked and they 
+               # haven't bothered to log out before trying to create an account to 
+               # evade it, but we'll leave that to their guilty conscience to figure
+               # out.
                
+               $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
+               $wgOut->setRobotpolicy( 'noindex,nofollow' );
+               $wgOut->setArticleRelated( false );
+
+               $ip = wfGetIP();
+               $wgOut->addWikiText( wfMsg( 'cantcreateaccounttext', $ip ) );
                $wgOut->returnToMain( false );
        }
 
        /**
-        * @access private
+        * @private
         */
-       function mainLoginForm( $err ) {
-               global $wgUser, $wgOut, $wgLang;
-               global $wgDBname, $wgAllowRealName, $wgEnableEmail;
-               global $wgAuth;
+       function mainLoginForm( $msg, $msgtype = 'error' ) {
+               global $wgUser, $wgOut, $wgAllowRealName, $wgEnableEmail;
+               global $wgCookiePrefix, $wgAuth, $wgLoginLanguageSelector;
+
+               if ( $this->mType == 'signup' ) {
+                       if ( !$wgUser->isAllowed( 'createaccount' ) ) {
+                               $this->userNotPrivilegedMessage();
+                               return;
+                       } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
+                               $this->userBlockedMessage();
+                               return;
+                       }
+               }
 
                if ( '' == $this->mName ) {
                        if ( $wgUser->isLoggedIn() ) {
                                $this->mName = $wgUser->getName();
                        } else {
-                               $this->mName = @$_COOKIE[$wgDBname.'UserName'];
+                               $this->mName = @$_COOKIE[$wgCookiePrefix.'UserName'];
                        }
                }
 
                $titleObj = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
 
-               require_once( 'templates/Userlogin.php' );
-
                if ( $this->mType == 'signup' ) {
-                       $template =& new UsercreateTemplate();
+                       $template = new UsercreateTemplate();
                        $q = 'action=submitlogin&type=signup';
                        $linkq = 'type=login';
-                       $msg = 'gotaccount';
+                       $linkmsg = 'gotaccount';
                } else {
-                       $template =& new UserloginTemplate();
+                       $template = new UserloginTemplate();
                        $q = 'action=submitlogin&type=login';
                        $linkq = 'type=signup';
-                       $msg = 'nologin';
+                       $linkmsg = 'nologin';
                }
 
-               if ( !empty( $this->mReturnto ) ) {
-                       $returnto = '&returnto=' . wfUrlencode( $this->mReturnto );
+               if ( !empty( $this->mReturnTo ) ) {
+                       $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
                        $q .= $returnto;
                        $linkq .= $returnto;
                }
+               
+               # Pass any language selection on to the mode switch link
+               if( $wgLoginLanguageSelector && $this->mLanguage )
+                       $linkq .= '&uselang=' . $this->mLanguage;
 
                $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalUrl( $linkq ) ) . '">';
-               $link .= wfMsgHtml( $msg . 'link' );
+               $link .= wfMsgHtml( $linkmsg . 'link' );
                $link .= '</a>';
 
-               $template->set( 'link', wfMsgHtml( $msg, $link ) );
+               # Don't show a "create account" link if the user can't
+               if( $this->showCreateOrLoginLink( $wgUser ) )
+                       $template->set( 'link', wfMsgHtml( $linkmsg, $link ) );
+               else
+                       $template->set( 'link', '' );
                
+               $template->set( 'header', '' );
                $template->set( 'name', $this->mName );
                $template->set( 'password', $this->mPassword );
                $template->set( 'retype', $this->mRetype );
@@ -484,33 +588,60 @@ class LoginForm {
                $template->set( 'domain', $this->mDomain );
 
                $template->set( 'action', $titleObj->getLocalUrl( $q ) );
-               $template->set( 'error', $err );
-               $template->set( 'create', $wgUser->isAllowedToCreateAccount() );
+               $template->set( 'message', $msg );
+               $template->set( 'messagetype', $msgtype );
                $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
                $template->set( 'userealname', $wgAllowRealName );
                $template->set( 'useemail', $wgEnableEmail );
                $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) or $this->mRemember  );
-               $wgAuth->modifyUITemplate( $template );
+                               
+               # Prepare language selection links as needed
+               if( $wgLoginLanguageSelector ) {
+                       $template->set( 'languages', $this->makeLanguageSelector() );
+                       if( $this->mLanguage )
+                               $template->set( 'uselang', $this->mLanguage );
+               }
                
+               // Give authentication and captcha plugins a chance to modify the form
+               $wgAuth->modifyUITemplate( $template );
+               if ( $this->mType == 'signup' ) {
+                       wfRunHooks( 'UserCreateForm', array( &$template ) );
+               } else {
+                       wfRunHooks( 'UserLoginForm', array( &$template ) );
+               }
+
                $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
                $wgOut->setRobotpolicy( 'noindex,nofollow' );
                $wgOut->setArticleRelated( false );
                $wgOut->addTemplate( $template );
        }
+       
+       /**
+        * @private
+        */
+       function showCreateOrLoginLink( &$user ) {
+               if( $this->mType == 'signup' ) {
+                       return( true );
+               } elseif( $user->isAllowed( 'createaccount' ) ) {
+                       return( true );
+               } else {
+                       return( false );
+               }
+       }
 
        /**
-        * @access private
+        * @private
         */
        function hasSessionCookie() {
                global $wgDisableCookieCheck;
                return ( $wgDisableCookieCheck ) ? true : ( isset( $_COOKIE[session_name()] ) );
        }
-         
+
        /**
-        * @access private
+        * @private
         */
        function cookieRedirectCheck( $type ) {
-               global $wgOut, $wgLang;
+               global $wgOut;
 
                $titleObj = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
                $check = $titleObj->getFullURL( 'wpCookieCheck='.$type );
@@ -519,7 +650,7 @@ class LoginForm {
        }
 
        /**
-        * @access private
+        * @private
         */
        function onCookieRedirectCheck( $type ) {
                global $wgUser;
@@ -539,12 +670,54 @@ class LoginForm {
        }
 
        /**
-        * @access private
+        * @private
         */
        function throttleHit( $limit ) {
                global $wgOut;
 
                $wgOut->addWikiText( wfMsg( 'acct_creation_throttle_hit', $limit ) );
        }
+       
+       /**
+        * Produce a bar of links which allow the user to select another language
+        * during login/registration but retain "returnto"
+        *
+        * @return string
+        */
+       function makeLanguageSelector() {
+               $msg = wfMsgForContent( 'loginlanguagelinks' );
+               if( $msg != '' && $msg != '&lt;loginlanguagelinks&gt;' ) {
+                       $langs = explode( "\n", $msg );
+                       $links = array();
+                       foreach( $langs as $lang ) {
+                               $lang = trim( $lang, '* ' );
+                               $parts = explode( '|', $lang );
+                               $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
+                       }
+                       return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', implode( ' | ', $links ) ) : '';
+               } else {
+                       return '';
+               }
+       }
+       
+       /**
+        * Create a language selector link for a particular language
+        * Links back to this page preserving type and returnto
+        *
+        * @param $text Link text
+        * @param $lang Language code
+        */
+       function makeLanguageSelectorLink( $text, $lang ) {
+               global $wgUser;
+               $self = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
+               $attr[] = 'uselang=' . $lang;
+               if( $this->mType == 'signup' )
+                       $attr[] = 'type=signup';
+               if( $this->mReturnTo )
+                       $attr[] = 'returnto=' . $this->mReturnTo;
+               $skin =& $wgUser->getSkin();
+               return $skin->makeKnownLinkObj( $self, htmlspecialchars( $text ), implode( '&', $attr ) );
+       }
+       
 }
 ?>