includes/specials/SpecialUserlogin.php

   1 <?php
   2 /**
   3  * Implements Special:UserLogin
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Implements Special:UserLogin
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class LoginForm extends SpecialPage {
  30
  31         const SUCCESS = 0;
  32         const NO_NAME = 1;
  33         const ILLEGAL = 2;
  34         const WRONG_PLUGIN_PASS = 3;
  35         const NOT_EXISTS = 4;
  36         const WRONG_PASS = 5;
  37         const EMPTY_PASS = 6;
  38         const RESET_PASS = 7;
  39         const ABORTED = 8;
  40         const CREATE_BLOCKED = 9;
  41         const THROTTLED = 10;
  42         const USER_BLOCKED = 11;
  43         const NEED_TOKEN = 12;
  44         const WRONG_TOKEN = 13;
  45
  46         var $mName, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
  47         var $mAction, $mCreateaccount, $mCreateaccountMail, $mMailmypassword;
  48         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  49         var $mSkipCookieCheck, $mReturnToQuery, $mToken, $mStickHTTPS, $mRequest;
  50
  51         private $mExtUser = null;
  52
  53         public function __construct( $request = null ) {
  54                 if ( $request === null ) {
  55                         global $wgRequest;
  56                         $this->mRequest = $wgRequest;
  57                 } else {
  58                         $this->mRequest = $request;
  59                 }
  60
  61                 parent::__construct( 'Userlogin' );
  62         }
  63
  64         /**
  65          * Loader
  66          *
  67          * @param $par String: subpage parameter
  68          */
  69         function load( $par ) {
  70                 global $wgAuth, $wgHiddenPrefs, $wgEnableEmail, $wgRedirectOnLogin;
  71
  72                 $this->mType = ( $par == 'signup' ) ? $par : $this->mRequest->getText( 'type' ); # Check for [[Special:Userlogin/signup]]
  73                 $this->mName = $this->mRequest->getText( 'wpName' );
  74                 $this->mPassword = $this->mRequest->getText( 'wpPassword' );
  75                 $this->mRetype = $this->mRequest->getText( 'wpRetype' );
  76                 $this->mDomain = $this->mRequest->getText( 'wpDomain' );
  77                 $this->mReason = $this->mRequest->getText( 'wpReason' );
  78                 $this->mReturnTo = $this->mRequest->getVal( 'returnto' );
  79                 $this->mReturnToQuery = $this->mRequest->getVal( 'returntoquery' );
  80                 $this->mCookieCheck = $this->mRequest->getVal( 'wpCookieCheck' );
  81                 $this->mPosted = $this->mRequest->wasPosted();
  82                 $this->mCreateaccount = $this->mRequest->getCheck( 'wpCreateaccount' );
  83                 $this->mCreateaccountMail = $this->mRequest->getCheck( 'wpCreateaccountMail' )
  84                                             && $wgEnableEmail;
  85                 $this->mMailmypassword = $this->mRequest->getCheck( 'wpMailmypassword' )
  86                                          && $wgEnableEmail;
  87                 $this->mLoginattempt = $this->mRequest->getCheck( 'wpLoginattempt' );
  88                 $this->mAction = $this->mRequest->getVal( 'action' );
  89                 $this->mRemember = $this->mRequest->getCheck( 'wpRemember' );
  90                 $this->mStickHTTPS = $this->mRequest->getCheck( 'wpStickHTTPS' );
  91                 $this->mLanguage = $this->mRequest->getText( 'uselang' );
  92                 $this->mSkipCookieCheck = $this->mRequest->getCheck( 'wpSkipCookieCheck' );
  93                 $this->mToken = ( $this->mType == 'signup' ) ? $this->mRequest->getVal( 'wpCreateaccountToken' ) : $this->mRequest->getVal( 'wpLoginToken' );
  94
  95                 if ( $wgRedirectOnLogin ) {
  96                         $this->mReturnTo = $wgRedirectOnLogin;
  97                         $this->mReturnToQuery = '';
  98                 }
  99
 100                 if( $wgEnableEmail ) {
 101                         $this->mEmail = $this->mRequest->getText( 'wpEmail' );
 102                 } else {
 103                         $this->mEmail = '';
 104                 }
 105                 if( !in_array( 'realname', $wgHiddenPrefs ) ) {
 106                     $this->mRealName = $this->mRequest->getText( 'wpRealName' );
 107                 } else {
 108                     $this->mRealName = '';
 109                 }
 110
 111                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 112                         $this->mDomain = 'invaliddomain';
 113                 }
 114                 $wgAuth->setDomain( $this->mDomain );
 115
 116                 # When switching accounts, it sucks to get automatically logged out
 117                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 118                 if( is_object( $returnToTitle ) && $returnToTitle->isSpecial( 'Userlogout' ) ) {
 119                         $this->mReturnTo = '';
 120                         $this->mReturnToQuery = '';
 121                 }
 122         }
 123
 124         public function execute( $par ) {
 125                 if ( session_id() == '' ) {
 126                         wfSetupSession();
 127                 }
 128
 129                 $this->load( $par );
 130
 131                 if ( !is_null( $this->mCookieCheck ) ) {
 132                         $this->onCookieRedirectCheck( $this->mCookieCheck );
 133                         return;
 134                 } elseif( $this->mPosted ) {
 135                         if( $this->mCreateaccount ) {
 136                                 return $this->addNewAccount();
 137                         } elseif ( $this->mCreateaccountMail ) {
 138                                 return $this->addNewAccountMailPassword();
 139                         } elseif ( $this->mMailmypassword ) {
 140                                 return $this->mailPassword();
 141                         } elseif ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 142                                 return $this->processLogin();
 143                         }
 144                 }
 145                 $this->mainLoginForm( '' );
 146         }
 147
 148         /**
 149          * @private
 150          */
 151         function addNewAccountMailPassword() {
 152                 global $wgOut;
 153
 154                 if ( $this->mEmail == '' ) {
 155                         $this->mainLoginForm( wfMsgExt( 'noemail', array( 'parsemag', 'escape' ), $this->mName ) );
 156                         return;
 157                 }
 158
 159                 $u = $this->addNewaccountInternal();
 160
 161                 if ( $u == null ) {
 162                         return;
 163                 }
 164
 165                 // Wipe the initial password and mail a temporary one
 166                 $u->setPassword( null );
 167                 $u->saveSettings();
 168                 $result = $this->mailPasswordInternal( $u, false, 'createaccount-title', 'createaccount-text' );
 169
 170                 wfRunHooks( 'AddNewAccount', array( $u, true ) );
 171                 $u->addNewUserLogEntry( true, $this->mReason );
 172
 173                 $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
 174
 175                 if( !$result->isGood() ) {
 176                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getWikiText() ) );
 177                 } else {
 178                         $wgOut->addWikiMsg( 'accmailtext', $u->getName(), $u->getEmail() );
 179                         $wgOut->returnToMain( false );
 180                 }
 181         }
 182
 183         /**
 184          * @private
 185          */
 186         function addNewAccount() {
 187                 global $wgUser, $wgEmailAuthentication, $wgOut;
 188
 189                 # Create the account and abort if there's a problem doing so
 190                 $u = $this->addNewAccountInternal();
 191                 if( $u == null ) {
 192                         return;
 193                 }
 194
 195                 # If we showed up language selection links, and one was in use, be
 196                 # smart (and sensible) and save that language as the user's preference
 197                 global $wgLoginLanguageSelector;
 198                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 199                         $u->setOption( 'language', $this->mLanguage );
 200                 }
 201
 202                 # Send out an email authentication message if needed
 203                 if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) ) {
 204                         $status = $u->sendConfirmationMail();
 205                         if( $status->isGood() ) {
 206                                 $wgOut->addWikiMsg( 'confirmemail_oncreate' );
 207                         } else {
 208                                 $wgOut->addWikiText( $status->getWikiText( 'confirmemail_sendfailed' ) );
 209                         }
 210                 }
 211
 212                 # Save settings (including confirmation token)
 213                 $u->saveSettings();
 214
 215                 # If not logged in, assume the new account as the current one and set
 216                 # session cookies then show a "welcome" message or a "need cookies"
 217                 # message as needed
 218                 if( $wgUser->isAnon() ) {
 219                         $wgUser = $u;
 220                         $wgUser->setCookies();
 221                         wfRunHooks( 'AddNewAccount', array( $wgUser, false ) );
 222                         $wgUser->addNewUserLogEntry();
 223                         if( $this->hasSessionCookie() ) {
 224                                 return $this->successfulCreation();
 225                         } else {
 226                                 return $this->cookieRedirectCheck( 'new' );
 227                         }
 228                 } else {
 229                         # Confirm that the account was created
 230                         $self = SpecialPage::getTitleFor( 'Userlogin' );
 231                         $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
 232                         $wgOut->addHTML( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
 233                         $wgOut->returnToMain( false, $self );
 234                         wfRunHooks( 'AddNewAccount', array( $u, false ) );
 235                         $u->addNewUserLogEntry( false, $this->mReason );
 236                         return true;
 237                 }
 238         }
 239
 240         /**
 241          * @private
 242          */
 243         function addNewAccountInternal() {
 244                 global $wgUser, $wgOut;
 245                 global $wgMemc, $wgAccountCreationThrottle;
 246                 global $wgAuth, $wgMinimalPasswordLength;
 247                 global $wgEmailConfirmToEdit;
 248
 249                 // If the user passes an invalid domain, something is fishy
 250                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 251                         $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 252                         return false;
 253                 }
 254
 255                 // If we are not allowing users to login locally, we should be checking
 256                 // to see if the user is actually able to authenticate to the authenti-
 257                 // cation server before they create an account (otherwise, they can
 258                 // create a local account and login as any domain user). We only need
 259                 // to check this for domains that aren't local.
 260                 if( 'local' != $this->mDomain && $this->mDomain != '' ) {
 261                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mName ) || !$wgAuth->authenticate( $this->mName, $this->mPassword ) ) ) {
 262                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 263                                 return false;
 264                         }
 265                 }
 266
 267                 if ( wfReadOnly() ) {
 268                         $wgOut->readOnlyPage();
 269                         return false;
 270                 }
 271
 272                 # Request forgery checks.
 273                 if ( !self::getCreateaccountToken() ) {
 274                         self::setCreateaccountToken();
 275                         $this->mainLoginForm( wfMsgExt( 'nocookiesnew', array( 'parseinline' ) ) );
 276                         return false;
 277                 }
 278
 279                 # The user didn't pass a createaccount token
 280                 if ( !$this->mToken ) {
 281                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 282                         return false;
 283                 }
 284
 285                 # Validate the createaccount token
 286                 if ( $this->mToken !== self::getCreateaccountToken() ) {
 287                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 288                         return false;
 289                 }
 290
 291                 # Check permissions
 292                 if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 293                         $wgOut->permissionRequired( 'createaccount' );
 294                         return false;
 295                 } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 296                         $this->userBlockedMessage();
 297                         return false;
 298                 }
 299
 300                 $ip = wfGetIP();
 301                 if ( $wgUser->isDnsBlacklisted( $ip, true /* check $wgProxyWhitelist */ ) ) {
 302                         $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
 303                         return false;
 304                 }
 305
 306                 # Now create a dummy user ($u) and check if it is valid
 307                 $name = trim( $this->mName );
 308                 $u = User::newFromName( $name, 'creatable' );
 309                 if ( !is_object( $u ) ) {
 310                         $this->mainLoginForm( wfMsg( 'noname' ) );
 311                         return false;
 312                 }
 313
 314                 if ( 0 != $u->idForName() ) {
 315                         $this->mainLoginForm( wfMsg( 'userexists' ) );
 316                         return false;
 317                 }
 318
 319                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 320                         $this->mainLoginForm( wfMsg( 'badretype' ) );
 321                         return false;
 322                 }
 323
 324                 # check for minimal password length
 325                 $valid = $u->getPasswordValidity( $this->mPassword );
 326                 if ( $valid !== true ) {
 327                         if ( !$this->mCreateaccountMail ) {
 328                                 $this->mainLoginForm( wfMsgExt( $valid, array( 'parsemag' ), $wgMinimalPasswordLength ) );
 329                                 return false;
 330                         } else {
 331                                 # do not force a password for account creation by email
 332                                 # set invalid password, it will be replaced later by a random generated password
 333                                 $this->mPassword = null;
 334                         }
 335                 }
 336
 337                 # if you need a confirmed email address to edit, then obviously you
 338                 # need an email address.
 339                 if ( $wgEmailConfirmToEdit && empty( $this->mEmail ) ) {
 340                         $this->mainLoginForm( wfMsg( 'noemailtitle' ) );
 341                         return false;
 342                 }
 343
 344                 if( !empty( $this->mEmail ) && !User::isValidEmailAddr( $this->mEmail ) ) {
 345                         $this->mainLoginForm( wfMsg( 'invalidemailaddress' ) );
 346                         return false;
 347                 }
 348
 349                 # Set some additional data so the AbortNewAccount hook can be used for
 350                 # more than just username validation
 351                 $u->setEmail( $this->mEmail );
 352                 $u->setRealName( $this->mRealName );
 353
 354                 $abortError = '';
 355                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 356                         // Hook point to add extra creation throttles and blocks
 357                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 358                         $this->mainLoginForm( $abortError );
 359                         return false;
 360                 }
 361
 362                 if ( $wgAccountCreationThrottle && $wgUser->isPingLimitable() ) {
 363                         $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 364                         $value = $wgMemc->get( $key );
 365                         if ( !$value ) {
 366                                 $wgMemc->set( $key, 0, 86400 );
 367                         }
 368                         if ( $value >= $wgAccountCreationThrottle ) {
 369                                 $this->throttleHit( $wgAccountCreationThrottle );
 370                                 return false;
 371                         }
 372                         $wgMemc->incr( $key );
 373                 }
 374
 375                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 376                         $this->mainLoginForm( wfMsg( 'externaldberror' ) );
 377                         return false;
 378                 }
 379
 380                 self::clearCreateaccountToken();
 381                 return $this->initUser( $u, false );
 382         }
 383
 384         /**
 385          * Actually add a user to the database.
 386          * Give it a User object that has been initialised with a name.
 387          *
 388          * @param $u User object.
 389          * @param $autocreate boolean -- true if this is an autocreation via auth plugin
 390          * @return User object.
 391          * @private
 392          */
 393         function initUser( $u, $autocreate ) {
 394                 global $wgAuth;
 395
 396                 $u->addToDatabase();
 397
 398                 if ( $wgAuth->allowPasswordChange() ) {
 399                         $u->setPassword( $this->mPassword );
 400                 }
 401
 402                 $u->setEmail( $this->mEmail );
 403                 $u->setRealName( $this->mRealName );
 404                 $u->setToken();
 405
 406                 $wgAuth->initUser( $u, $autocreate );
 407
 408                 if ( $this->mExtUser ) {
 409                         $this->mExtUser->linkToLocal( $u->getId() );
 410                         $email = $this->mExtUser->getPref( 'emailaddress' );
 411                         if ( $email && !$this->mEmail ) {
 412                                 $u->setEmail( $email );
 413                         }
 414                 }
 415
 416                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 417                 $u->saveSettings();
 418
 419                 # Update user count
 420                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 421                 $ssUpdate->doUpdate();
 422
 423                 return $u;
 424         }
 425
 426         /**
 427          * Internally authenticate the login request.
 428          *
 429          * This may create a local account as a side effect if the
 430          * authentication plugin allows transparent local account
 431          * creation.
 432          */
 433         public function authenticateUserData() {
 434                 global $wgUser, $wgAuth, $wgMemc;
 435
 436                 if ( $this->mName == '' ) {
 437                         return self::NO_NAME;
 438                 }
 439
 440                 // We require a login token to prevent login CSRF
 441                 // Handle part of this before incrementing the throttle so
 442                 // token-less login attempts don't count towards the throttle
 443                 // but wrong-token attempts do.
 444
 445                 // If the user doesn't have a login token yet, set one.
 446                 if ( !self::getLoginToken() ) {
 447                         self::setLoginToken();
 448                         return self::NEED_TOKEN;
 449                 }
 450                 // If the user didn't pass a login token, tell them we need one
 451                 if ( !$this->mToken ) {
 452                         return self::NEED_TOKEN;
 453                 }
 454
 455                 global $wgPasswordAttemptThrottle;
 456
 457                 $throttleCount = 0;
 458                 if ( is_array( $wgPasswordAttemptThrottle ) ) {
 459                         $throttleKey = wfMemcKey( 'password-throttle', wfGetIP(), md5( $this->mName ) );
 460                         $count = $wgPasswordAttemptThrottle['count'];
 461                         $period = $wgPasswordAttemptThrottle['seconds'];
 462
 463                         $throttleCount = $wgMemc->get( $throttleKey );
 464                         if ( !$throttleCount ) {
 465                                 $wgMemc->add( $throttleKey, 1, $period ); // start counter
 466                         } elseif ( $throttleCount < $count ) {
 467                                 $wgMemc->incr( $throttleKey );
 468                         } elseif ( $throttleCount >= $count ) {
 469                                 return self::THROTTLED;
 470                         }
 471                 }
 472
 473                 // Validate the login token
 474                 if ( $this->mToken !== self::getLoginToken() ) {
 475                         return self::WRONG_TOKEN;
 476                 }
 477
 478                 // Load $wgUser now, and check to see if we're logging in as the same
 479                 // name. This is necessary because loading $wgUser (say by calling
 480                 // getName()) calls the UserLoadFromSession hook, which potentially
 481                 // creates the user in the database. Until we load $wgUser, checking
 482                 // for user existence using User::newFromName($name)->getId() below
 483                 // will effectively be using stale data.
 484                 if ( $wgUser->getName() === $this->mName ) {
 485                         wfDebug( __METHOD__ . ": already logged in as {$this->mName}\n" );
 486                         return self::SUCCESS;
 487                 }
 488
 489                 $this->mExtUser = ExternalUser::newFromName( $this->mName );
 490
 491                 # TODO: Allow some magic here for invalid external names, e.g., let the
 492                 # user choose a different wiki name.
 493                 $u = User::newFromName( $this->mName );
 494                 if( !( $u instanceof User ) || !User::isUsableName( $u->getName() ) ) {
 495                         return self::ILLEGAL;
 496                 }
 497
 498                 $isAutoCreated = false;
 499                 if ( 0 == $u->getID() ) {
 500                         $status = $this->attemptAutoCreate( $u );
 501                         if ( $status !== self::SUCCESS ) {
 502                                 return $status;
 503                         } else {
 504                                 $isAutoCreated = true;
 505                         }
 506                 } else {
 507                         global $wgExternalAuthType, $wgAutocreatePolicy;
 508                         if ( $wgExternalAuthType && $wgAutocreatePolicy != 'never'
 509                         && is_object( $this->mExtUser )
 510                         && $this->mExtUser->authenticate( $this->mPassword ) ) {
 511                                 # The external user and local user have the same name and
 512                                 # password, so we assume they're the same.
 513                                 $this->mExtUser->linkToLocal( $u->getID() );
 514                         }
 515
 516                         $u->load();
 517                 }
 518
 519                 // Give general extensions, such as a captcha, a chance to abort logins
 520                 $abort = self::ABORTED;
 521                 if( !wfRunHooks( 'AbortLogin', array( $u, $this->mPassword, &$abort ) ) ) {
 522                         return $abort;
 523                 }
 524
 525                 global $wgBlockDisablesLogin;
 526                 if ( !$u->checkPassword( $this->mPassword ) ) {
 527                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 528                                 // The e-mailed temporary password should not be used for actu-
 529                                 // al logins; that's a very sloppy habit, and insecure if an
 530                                 // attacker has a few seconds to click "search" on someone's o-
 531                                 // pen mail reader.
 532                                 //
 533                                 // Allow it to be used only to reset the password a single time
 534                                 // to a new value, which won't be in the user's e-mail ar-
 535                                 // chives.
 536                                 //
 537                                 // For backwards compatibility, we'll still recognize it at the
 538                                 // login form to minimize surprises for people who have been
 539                                 // logging in with a temporary password for some time.
 540                                 //
 541                                 // As a side-effect, we can authenticate the user's e-mail ad-
 542                                 // dress if it's not already done, since the temporary password
 543                                 // was sent via e-mail.
 544                                 if( !$u->isEmailConfirmed() ) {
 545                                         $u->confirmEmail();
 546                                         $u->saveSettings();
 547                                 }
 548
 549                                 // At this point we just return an appropriate code/ indicating
 550                                 // that the UI should show a password reset form; bot inter-
 551                                 // faces etc will probably just fail cleanly here.
 552                                 $retval = self::RESET_PASS;
 553                         } else {
 554                                 $retval = ( $this->mPassword  == '' ) ? self::EMPTY_PASS : self::WRONG_PASS;
 555                         }
 556                 } elseif ( $wgBlockDisablesLogin && $u->isBlocked() ) {
 557                         // If we've enabled it, make it so that a blocked user cannot login
 558                         $retval = self::USER_BLOCKED;
 559                 } else {
 560                         $wgAuth->updateUser( $u );
 561                         $wgUser = $u;
 562
 563                         // Please reset throttle for successful logins, thanks!
 564                         if( $throttleCount ) {
 565                                 $wgMemc->delete( $throttleKey );
 566                         }
 567
 568                         if ( $isAutoCreated ) {
 569                                 // Must be run after $wgUser is set, for correct new user log
 570                                 wfRunHooks( 'AuthPluginAutoCreate', array( $wgUser ) );
 571                         }
 572
 573                         $retval = self::SUCCESS;
 574                 }
 575                 wfRunHooks( 'LoginAuthenticateAudit', array( $u, $this->mPassword, $retval ) );
 576                 return $retval;
 577         }
 578
 579         /**
 580          * Attempt to automatically create a user on login. Only succeeds if there
 581          * is an external authentication method which allows it.
 582          * @return integer Status code
 583          */
 584         function attemptAutoCreate( $user ) {
 585                 global $wgAuth, $wgUser, $wgAutocreatePolicy;
 586
 587                 if ( $wgUser->isBlockedFromCreateAccount() ) {
 588                         wfDebug( __METHOD__ . ": user is blocked from account creation\n" );
 589                         return self::CREATE_BLOCKED;
 590                 }
 591
 592                 /**
 593                  * If the external authentication plugin allows it, automatically cre-
 594                  * ate a new account for users that are externally defined but have not
 595                  * yet logged in.
 596                  */
 597                 if ( $this->mExtUser ) {
 598                         # mExtUser is neither null nor false, so use the new ExternalAuth
 599                         # system.
 600                         if ( $wgAutocreatePolicy == 'never' ) {
 601                                 return self::NOT_EXISTS;
 602                         }
 603                         if ( !$this->mExtUser->authenticate( $this->mPassword ) ) {
 604                                 return self::WRONG_PLUGIN_PASS;
 605                         }
 606                 } else {
 607                         # Old AuthPlugin.
 608                         if ( !$wgAuth->autoCreate() ) {
 609                                 return self::NOT_EXISTS;
 610                         }
 611                         if ( !$wgAuth->userExists( $user->getName() ) ) {
 612                                 wfDebug( __METHOD__ . ": user does not exist\n" );
 613                                 return self::NOT_EXISTS;
 614                         }
 615                         if ( !$wgAuth->authenticate( $user->getName(), $this->mPassword ) ) {
 616                                 wfDebug( __METHOD__ . ": \$wgAuth->authenticate() returned false, aborting\n" );
 617                                 return self::WRONG_PLUGIN_PASS;
 618                         }
 619                 }
 620
 621                 wfDebug( __METHOD__ . ": creating account\n" );
 622                 $this->initUser( $user, true );
 623                 return self::SUCCESS;
 624         }
 625
 626         function processLogin() {
 627                 global $wgUser;
 628
 629                 switch ( $this->authenticateUserData() ) {
 630                         case self::SUCCESS:
 631                                 # We've verified now, update the real record
 632                                 if( (bool)$this->mRemember != (bool)$wgUser->getOption( 'rememberpassword' ) ) {
 633                                         $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 634                                         $wgUser->saveSettings();
 635                                 } else {
 636                                         $wgUser->invalidateCache();
 637                                 }
 638                                 $wgUser->setCookies();
 639                                 self::clearLoginToken();
 640
 641                                 // Reset the throttle
 642                                 $key = wfMemcKey( 'password-throttle', wfGetIP(), md5( $this->mName ) );
 643                                 global $wgMemc;
 644                                 $wgMemc->delete( $key );
 645
 646                                 if( $this->hasSessionCookie() || $this->mSkipCookieCheck ) {
 647                                         /* Replace the language object to provide user interface in
 648                                          * correct language immediately on this first page load.
 649                                          */
 650                                         global $wgLang, $wgRequest;
 651                                         $code = $wgRequest->getVal( 'uselang', $wgUser->getOption( 'language' ) );
 652                                         $wgLang = Language::factory( $code );
 653                                         return $this->successfulLogin();
 654                                 } else {
 655                                         return $this->cookieRedirectCheck( 'login' );
 656                                 }
 657                                 break;
 658
 659                         case self::NEED_TOKEN:
 660                                 $this->mainLoginForm( wfMsgExt( 'nocookieslogin', array( 'parseinline' ) ) );
 661                                 break;
 662                         case self::WRONG_TOKEN:
 663                                 $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 664                                 break;
 665                         case self::NO_NAME:
 666                         case self::ILLEGAL:
 667                                 $this->mainLoginForm( wfMsg( 'noname' ) );
 668                                 break;
 669                         case self::WRONG_PLUGIN_PASS:
 670                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 671                                 break;
 672                         case self::NOT_EXISTS:
 673                                 if( $wgUser->isAllowed( 'createaccount' ) ) {
 674                                         $this->mainLoginForm( wfMsgWikiHtml( 'nosuchuser', htmlspecialchars( $this->mName ) ) );
 675                                 } else {
 676                                         $this->mainLoginForm( wfMsg( 'nosuchusershort', htmlspecialchars( $this->mName ) ) );
 677                                 }
 678                                 break;
 679                         case self::WRONG_PASS:
 680                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 681                                 break;
 682                         case self::EMPTY_PASS:
 683                                 $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
 684                                 break;
 685                         case self::RESET_PASS:
 686                                 $this->resetLoginForm( wfMsg( 'resetpass_announce' ) );
 687                                 break;
 688                         case self::CREATE_BLOCKED:
 689                                 $this->userBlockedMessage();
 690                                 break;
 691                         case self::THROTTLED:
 692                                 $this->mainLoginForm( wfMsg( 'login-throttled' ) );
 693                                 break;
 694                         case self::USER_BLOCKED:
 695                                 $this->mainLoginForm( wfMsgExt( 'login-userblocked',
 696                                         array( 'parsemag', 'escape' ), $this->mName ) );
 697                                 break;
 698                         default:
 699                                 throw new MWException( 'Unhandled case value' );
 700                 }
 701         }
 702
 703         function resetLoginForm( $error ) {
 704                 global $wgOut;
 705                 $wgOut->addHTML( Xml::element('p', array( 'class' => 'error' ), $error ) );
 706                 $reset = new SpecialResetpass();
 707                 $reset->execute( null );
 708         }
 709
 710         /**
 711          * @private
 712          */
 713         function mailPassword() {
 714                 global $wgUser, $wgOut, $wgAuth;
 715
 716                 if ( wfReadOnly() ) {
 717                         $wgOut->readOnlyPage();
 718                         return false;
 719                 }
 720
 721                 if( !$wgAuth->allowPasswordChange() ) {
 722                         $this->mainLoginForm( wfMsg( 'resetpass_forbidden' ) );
 723                         return;
 724                 }
 725
 726                 # Check against blocked IPs so blocked users can't flood admins
 727                 # with password resets
 728                 if( $wgUser->isBlocked() ) {
 729                         $this->mainLoginForm( wfMsg( 'blocked-mailpassword' ) );
 730                         return;
 731                 }
 732
 733                 # Check for hooks
 734                 $error = null;
 735                 if ( !wfRunHooks( 'UserLoginMailPassword', array( $this->mName, &$error ) ) ) {
 736                         $this->mainLoginForm( $error );
 737                         return;
 738                 }
 739
 740                 # If the user doesn't have a login token yet, set one.
 741                 if ( !self::getLoginToken() ) {
 742                         self::setLoginToken();
 743                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 744                         return;
 745                 }
 746
 747                 # If the user didn't pass a login token, tell them we need one
 748                 if ( !$this->mToken ) {
 749                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 750                         return;
 751                 }
 752
 753                 # Check against the rate limiter
 754                 if( $wgUser->pingLimiter( 'mailpassword' ) ) {
 755                         $wgOut->rateLimited();
 756                         return;
 757                 }
 758
 759                 if ( $this->mName == '' ) {
 760                         $this->mainLoginForm( wfMsg( 'noname' ) );
 761                         return;
 762                 }
 763                 $u = User::newFromName( $this->mName );
 764                 if( !$u instanceof User ) {
 765                         $this->mainLoginForm( wfMsg( 'noname' ) );
 766                         return;
 767                 }
 768                 if ( 0 == $u->getID() ) {
 769                         $this->mainLoginForm( wfMsgWikiHtml( 'nosuchuser', htmlspecialchars( $u->getName() ) ) );
 770                         return;
 771                 }
 772
 773                 # Validate the login token
 774                 if ( $this->mToken !== self::getLoginToken() ) {
 775                         $this->mainLoginForm( wfMsg( 'sessionfailure' ) );
 776                         return;
 777                 }
 778
 779                 # Check against password throttle
 780                 if ( $u->isPasswordReminderThrottled() ) {
 781                         global $wgPasswordReminderResendTime;
 782                         # Round the time in hours to 3 d.p., in case someone is specifying
 783                         # minutes or seconds.
 784                         $this->mainLoginForm( wfMsgExt( 'throttled-mailpassword', array( 'parsemag' ),
 785                                 round( $wgPasswordReminderResendTime, 3 ) ) );
 786                         return;
 787                 }
 788
 789                 $result = $this->mailPasswordInternal( $u, true, 'passwordremindertitle', 'passwordremindertext' );
 790                 if( $result->isGood() ) {
 791                         $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
 792                         self::clearLoginToken();
 793                 } else {
 794                         $this->mainLoginForm( $result->getWikiText( 'mailerror' ) );
 795                 }
 796         }
 797
 798
 799         /**
 800          * @param $u User object
 801          * @param $throttle Boolean
 802          * @param $emailTitle String: message name of email title
 803          * @param $emailText String: message name of email text
 804          * @return Status object
 805          * @private
 806          */
 807         function mailPasswordInternal( $u, $throttle = true, $emailTitle = 'passwordremindertitle', $emailText = 'passwordremindertext' ) {
 808                 global $wgServer, $wgScript, $wgUser, $wgNewPasswordExpiry;
 809
 810                 if ( $u->getEmail() == '' ) {
 811                         return Status::newFatal( 'noemail', $u->getName() );
 812                 }
 813                 $ip = wfGetIP();
 814                 if( !$ip ) {
 815                         return Status::newFatal( 'badipaddress' );
 816                 }
 817
 818                 wfRunHooks( 'User::mailPasswordInternal', array( &$wgUser, &$ip, &$u ) );
 819
 820                 $np = $u->randomPassword();
 821                 $u->setNewpassword( $np, $throttle );
 822                 $u->saveSettings();
 823                 $userLanguage = $u->getOption( 'language' );
 824                 $m = wfMsgExt( $emailText, array( 'parsemag', 'language' => $userLanguage ), $ip, $u->getName(), $np,
 825                                 $wgServer . $wgScript, round( $wgNewPasswordExpiry / 86400 ) );
 826                 $result = $u->sendMail( wfMsgExt( $emailTitle, array( 'parsemag', 'language' => $userLanguage ) ), $m );
 827
 828                 return $result;
 829         }
 830
 831
 832         /**
 833          * Run any hooks registered for logins, then HTTP redirect to
 834          * $this->mReturnTo (or Main Page if that's undefined).  Formerly we had a
 835          * nice message here, but that's really not as useful as just being sent to
 836          * wherever you logged in from.  It should be clear that the action was
 837          * successful, given the lack of error messages plus the appearance of your
 838          * name in the upper right.
 839          *
 840          * @private
 841          */
 842         function successfulLogin() {
 843                 global $wgUser, $wgOut;
 844
 845                 # Run any hooks; display injected HTML if any, else redirect
 846                 $injected_html = '';
 847                 wfRunHooks( 'UserLoginComplete', array( &$wgUser, &$injected_html ) );
 848
 849                 if( $injected_html !== '' ) {
 850                         $this->displaySuccessfulLogin( 'loginsuccess', $injected_html );
 851                 } else {
 852                         $titleObj = Title::newFromText( $this->mReturnTo );
 853                         if ( !$titleObj instanceof Title ) {
 854                                 $titleObj = Title::newMainPage();
 855                         }
 856                         $redirectUrl = $titleObj->getFullURL( $this->mReturnToQuery );
 857                         global $wgSecureLogin;
 858                         if( $wgSecureLogin && !$this->mStickHTTPS ) {
 859                                 $redirectUrl = preg_replace( '/^https:/', 'http:', $redirectUrl );
 860                         }
 861                         $wgOut->redirect( $redirectUrl );
 862                 }
 863         }
 864
 865         /**
 866          * Run any hooks registered for logins, then display a message welcoming
 867          * the user.
 868          *
 869          * @private
 870          */
 871         function successfulCreation() {
 872                 global $wgUser;
 873                 # Run any hooks; display injected HTML
 874                 $injected_html = '';
 875                 wfRunHooks( 'UserLoginComplete', array( &$wgUser, &$injected_html ) );
 876
 877                 $this->displaySuccessfulLogin( 'welcomecreation', $injected_html );
 878         }
 879
 880         /**
 881          * Display a "login successful" page.
 882          */
 883         private function displaySuccessfulLogin( $msgname, $injected_html ) {
 884                 global $wgOut, $wgUser;
 885
 886                 $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
 887                 $wgOut->addWikiMsg( $msgname, $wgUser->getName() );
 888                 $wgOut->addHTML( $injected_html );
 889
 890                 if ( !empty( $this->mReturnTo ) ) {
 891                         $wgOut->returnToMain( null, $this->mReturnTo, $this->mReturnToQuery );
 892                 } else {
 893                         $wgOut->returnToMain( null );
 894                 }
 895         }
 896
 897         /** */
 898         function userBlockedMessage() {
 899                 global $wgOut, $wgUser;
 900
 901                 # Let's be nice about this, it's likely that this feature will be used
 902                 # for blocking large numbers of innocent people, e.g. range blocks on
 903                 # schools. Don't blame it on the user. There's a small chance that it
 904                 # really is the user's fault, i.e. the username is blocked and they
 905                 # haven't bothered to log out before trying to create an account to
 906                 # evade it, but we'll leave that to their guilty conscience to figure
 907                 # out.
 908
 909                 $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
 910
 911                 $ip = wfGetIP();
 912                 $blocker = User::whoIs( $wgUser->mBlock->mBy );
 913                 $block_reason = $wgUser->mBlock->mReason;
 914
 915                 if ( strval( $block_reason ) === '' ) {
 916                         $block_reason = wfMsg( 'blockednoreason' );
 917                 }
 918                 $wgOut->addWikiMsg( 'cantcreateaccount-text', $ip, $block_reason, $blocker );
 919                 $wgOut->returnToMain( false );
 920         }
 921
 922         /**
 923          * @private
 924          */
 925         function mainLoginForm( $msg, $msgtype = 'error' ) {
 926                 global $wgUser, $wgOut, $wgHiddenPrefs, $wgEnableEmail;
 927                 global $wgRequest, $wgLoginLanguageSelector;
 928                 global $wgAuth, $wgEmailConfirmToEdit, $wgCookieExpiration;
 929                 global $wgSecureLogin;
 930
 931                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 932
 933                 if ( $this->mType == 'signup' ) {
 934                         // Block signup here if in readonly. Keeps user from
 935                         // going through the process (filling out data, etc)
 936                         // and being informed later.
 937                         if ( wfReadOnly() ) {
 938                                 $wgOut->readOnlyPage();
 939                                 return;
 940                         } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 941                                 $this->userBlockedMessage();
 942                                 return;
 943                         } elseif ( count( $permErrors = $titleObj->getUserPermissionsErrors( 'createaccount', $wgUser, true ) )>0 ) {
 944                                 $wgOut->showPermissionsErrorPage( $permErrors, 'createaccount' );
 945                                 return;
 946                         }
 947                 }
 948
 949                 if ( $this->mName == '' ) {
 950                         if ( $wgUser->isLoggedIn() ) {
 951                                 $this->mName = $wgUser->getName();
 952                         } else {
 953                                 $this->mName = $wgRequest->getCookie( 'UserName' );
 954                         }
 955                 }
 956
 957                 if ( $this->mType == 'signup' ) {
 958                         global $wgLivePasswordStrengthChecks;
 959                         if ( $wgLivePasswordStrengthChecks ) {
 960                                 $wgOut->addPasswordSecurity( 'wpPassword2', 'wpRetype' );
 961                         }
 962                         $template = new UsercreateTemplate();
 963                         $q = 'action=submitlogin&type=signup';
 964                         $linkq = 'type=login';
 965                         $linkmsg = 'gotaccount';
 966                 } else {
 967                         $template = new UserloginTemplate();
 968                         $q = 'action=submitlogin&type=login';
 969                         $linkq = 'type=signup';
 970                         $linkmsg = 'nologin';
 971                 }
 972
 973                 if ( !empty( $this->mReturnTo ) ) {
 974                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
 975                         if ( !empty( $this->mReturnToQuery ) ) {
 976                                 $returnto .= '&returntoquery=' .
 977                                         wfUrlencode( $this->mReturnToQuery );
 978                         }
 979                         $q .= $returnto;
 980                         $linkq .= $returnto;
 981                 }
 982
 983                 # Pass any language selection on to the mode switch link
 984                 if( $wgLoginLanguageSelector && $this->mLanguage ) {
 985                         $linkq .= '&uselang=' . $this->mLanguage;
 986                 }
 987
 988                 $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalURL( $linkq ) ) . '">';
 989                 $link .= wfMsgHtml( $linkmsg . 'link' ); # Calling either 'gotaccountlink' or 'nologinlink'
 990                 $link .= '</a>';
 991
 992                 # Don't show a "create account" link if the user can't
 993                 if( $this->showCreateOrLoginLink( $wgUser ) ) {
 994                         $template->set( 'link', wfMsgExt( $linkmsg, array( 'parseinline', 'replaceafter' ), $link ) );
 995                 } else {
 996                         $template->set( 'link', '' );
 997                 }
 998
 999                 $template->set( 'header', '' );
1000                 $template->set( 'name', $this->mName );
1001                 $template->set( 'password', $this->mPassword );
1002                 $template->set( 'retype', $this->mRetype );
1003                 $template->set( 'email', $this->mEmail );
1004                 $template->set( 'realname', $this->mRealName );
1005                 $template->set( 'domain', $this->mDomain );
1006                 $template->set( 'reason', $this->mReason );
1007
1008                 $template->set( 'action', $titleObj->getLocalURL( $q ) );
1009                 $template->set( 'message', $msg );
1010                 $template->set( 'messagetype', $msgtype );
1011                 $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
1012                 $template->set( 'userealname', !in_array( 'realname', $wgHiddenPrefs ) );
1013                 $template->set( 'useemail', $wgEnableEmail );
1014                 $template->set( 'emailrequired', $wgEmailConfirmToEdit );
1015                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
1016                 $template->set( 'canremember', ( $wgCookieExpiration > 0 ) );
1017                 $template->set( 'usereason', $wgUser->isLoggedIn() );
1018                 $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) || $this->mRemember );
1019                 $template->set( 'cansecurelogin', ( $wgSecureLogin === true ) );
1020                 $template->set( 'stickHTTPS', $this->mStickHTTPS );
1021
1022                 if ( $this->mType == 'signup' ) {
1023                         if ( !self::getCreateaccountToken() ) {
1024                                 self::setCreateaccountToken();
1025                         }
1026                         $template->set( 'token', self::getCreateaccountToken() );
1027                 } else {
1028                         if ( !self::getLoginToken() ) {
1029                                 self::setLoginToken();
1030                         }
1031                         $template->set( 'token', self::getLoginToken() );
1032                 }
1033
1034                 # Prepare language selection links as needed
1035                 if( $wgLoginLanguageSelector ) {
1036                         $template->set( 'languages', $this->makeLanguageSelector() );
1037                         if( $this->mLanguage )
1038                                 $template->set( 'uselang', $this->mLanguage );
1039                 }
1040
1041                 // Give authentication and captcha plugins a chance to modify the form
1042                 $wgAuth->modifyUITemplate( $template, $this->mType );
1043                 if ( $this->mType == 'signup' ) {
1044                         wfRunHooks( 'UserCreateForm', array( &$template ) );
1045                 } else {
1046                         wfRunHooks( 'UserLoginForm', array( &$template ) );
1047                 }
1048
1049                 // Changes the title depending on permissions for creating account
1050                 if ( $wgUser->isAllowed( 'createaccount' ) ) {
1051                         $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
1052                 } else {
1053                         $wgOut->setPageTitle( wfMsg( 'userloginnocreate' ) );
1054                 }
1055
1056                 $wgOut->disallowUserJs(); // just in case...
1057                 $wgOut->addTemplate( $template );
1058         }
1059
1060         /**
1061          * @private
1062          */
1063         function showCreateOrLoginLink( &$user ) {
1064                 if( $this->mType == 'signup' ) {
1065                         return( true );
1066                 } elseif( $user->isAllowed( 'createaccount' ) ) {
1067                         return( true );
1068                 } else {
1069                         return( false );
1070                 }
1071         }
1072
1073         /**
1074          * Check if a session cookie is present.
1075          *
1076          * This will not pick up a cookie set during _this_ request, but is meant
1077          * to ensure that the client is returning the cookie which was set on a
1078          * previous pass through the system.
1079          *
1080          * @private
1081          */
1082         function hasSessionCookie() {
1083                 global $wgDisableCookieCheck, $wgRequest;
1084                 return $wgDisableCookieCheck ? true : $wgRequest->checkSessionCookie();
1085         }
1086
1087         /**
1088          * Get the login token from the current session
1089          */
1090         public static function getLoginToken() {
1091                 global $wgRequest;
1092                 return $wgRequest->getSessionData( 'wsLoginToken' );
1093         }
1094
1095         /**
1096          * Randomly generate a new login token and attach it to the current session
1097          */
1098         public static function setLoginToken() {
1099                 global $wgRequest;
1100                 // Use User::generateToken() instead of $user->editToken()
1101                 // because the latter reuses $_SESSION['wsEditToken']
1102                 $wgRequest->setSessionData( 'wsLoginToken', User::generateToken() );
1103         }
1104
1105         /**
1106          * Remove any login token attached to the current session
1107          */
1108         public static function clearLoginToken() {
1109                 global $wgRequest;
1110                 $wgRequest->setSessionData( 'wsLoginToken', null );
1111         }
1112
1113         /**
1114          * Get the createaccount token from the current session
1115          */
1116         public static function getCreateaccountToken() {
1117                 global $wgRequest;
1118                 return $wgRequest->getSessionData( 'wsCreateaccountToken' );
1119         }
1120
1121         /**
1122          * Randomly generate a new createaccount token and attach it to the current session
1123          */
1124         public static function setCreateaccountToken() {
1125                 global $wgRequest;
1126                 $wgRequest->setSessionData( 'wsCreateaccountToken', User::generateToken() );
1127         }
1128
1129         /**
1130          * Remove any createaccount token attached to the current session
1131          */
1132         public static function clearCreateaccountToken() {
1133                 global $wgRequest;
1134                 $wgRequest->setSessionData( 'wsCreateaccountToken', null );
1135         }
1136
1137         /**
1138          * @private
1139          */
1140         function cookieRedirectCheck( $type ) {
1141                 global $wgOut;
1142
1143                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
1144                 $query = array( 'wpCookieCheck' => $type );
1145                 if ( $this->mReturnTo ) {
1146                         $query['returnto'] = $this->mReturnTo;
1147                 }
1148                 $check = $titleObj->getFullURL( $query );
1149
1150                 return $wgOut->redirect( $check );
1151         }
1152
1153         /**
1154          * @private
1155          */
1156         function onCookieRedirectCheck( $type ) {
1157                 if ( !$this->hasSessionCookie() ) {
1158                         if ( $type == 'new' ) {
1159                                 return $this->mainLoginForm( wfMsgExt( 'nocookiesnew', array( 'parseinline' ) ) );
1160                         } elseif ( $type == 'login' ) {
1161                                 return $this->mainLoginForm( wfMsgExt( 'nocookieslogin', array( 'parseinline' ) ) );
1162                         } else {
1163                                 # shouldn't happen
1164                                 return $this->mainLoginForm( wfMsg( 'error' ) );
1165                         }
1166                 } else {
1167                         return $this->successfulLogin();
1168                 }
1169         }
1170
1171         /**
1172          * @private
1173          */
1174         function throttleHit( $limit ) {
1175                 $this->mainLoginForm( wfMsgExt( 'acct_creation_throttle_hit', array( 'parseinline' ), $limit ) );
1176         }
1177
1178         /**
1179          * Produce a bar of links which allow the user to select another language
1180          * during login/registration but retain "returnto"
1181          *
1182          * @return string
1183          */
1184         function makeLanguageSelector() {
1185                 global $wgLang;
1186
1187                 $msg = wfMsgForContent( 'loginlanguagelinks' );
1188                 if( $msg != '' && !wfEmptyMsg( 'loginlanguagelinks', $msg ) ) {
1189                         $langs = explode( "\n", $msg );
1190                         $links = array();
1191                         foreach( $langs as $lang ) {
1192                                 $lang = trim( $lang, '* ' );
1193                                 $parts = explode( '|', $lang );
1194                                 if ( count( $parts ) >= 2 ) {
1195                                         $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
1196                                 }
1197                         }
1198                         return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', $wgLang->pipeList( $links ) ) : '';
1199                 } else {
1200                         return '';
1201                 }
1202         }
1203
1204         /**
1205          * Create a language selector link for a particular language
1206          * Links back to this page preserving type and returnto
1207          *
1208          * @param $text Link text
1209          * @param $lang Language code
1210          */
1211         function makeLanguageSelectorLink( $text, $lang ) {
1212                 global $wgUser;
1213                 $self = SpecialPage::getTitleFor( 'Userlogin' );
1214                 $attr = array( 'uselang' => $lang );
1215                 if( $this->mType == 'signup' ) {
1216                         $attr['type'] = 'signup';
1217                 }
1218                 if( $this->mReturnTo ) {
1219                         $attr['returnto'] = $this->mReturnTo;
1220                 }
1221                 $skin = $wgUser->getSkin();
1222                 return $skin->linkKnown(
1223                         $self,
1224                         htmlspecialchars( $text ),
1225                         array(),
1226                         $attr
1227                 );
1228         }
1229 }