includes/SpecialUserlogin.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup SpecialPage
   5  */
   6
   7 /**
   8  * constructor
   9  */
  10 function wfSpecialUserlogin() {
  11         global $wgCommandLineMode;
  12         global $wgRequest;
  13         if( session_id() == '' ) {
  14                 wfSetupSession();
  15         }
  16
  17         $form = new LoginForm( $wgRequest );
  18         $form->execute();
  19 }
  20
  21 /**
  22  * implements Special:Login
  23  * @addtogroup SpecialPage
  24  */
  25 class LoginForm {
  26
  27         const SUCCESS = 0;
  28         const NO_NAME = 1;
  29         const ILLEGAL = 2;
  30         const WRONG_PLUGIN_PASS = 3;
  31         const NOT_EXISTS = 4;
  32         const WRONG_PASS = 5;
  33         const EMPTY_PASS = 6;
  34         const RESET_PASS = 7;
  35
  36         var $mName, $mPassword, $mRetype, $mReturnTo, $mCookieCheck, $mPosted;
  37         var $mAction, $mCreateaccount, $mCreateaccountMail, $mMailmypassword;
  38         var $mLoginattempt, $mRemember, $mEmail, $mDomain, $mLanguage;
  39
  40         /**
  41          * Constructor
  42          * @param WebRequest $request A WebRequest object passed by reference
  43          */
  44         function LoginForm( &$request ) {
  45                 global $wgLang, $wgAllowRealName, $wgEnableEmail;
  46                 global $wgAuth;
  47
  48                 $this->mType = $request->getText( 'type' );
  49                 $this->mName = $request->getText( 'wpName' );
  50                 $this->mPassword = $request->getText( 'wpPassword' );
  51                 $this->mRetype = $request->getText( 'wpRetype' );
  52                 $this->mDomain = $request->getText( 'wpDomain' );
  53                 $this->mReturnTo = $request->getVal( 'returnto' );
  54                 $this->mCookieCheck = $request->getVal( 'wpCookieCheck' );
  55                 $this->mPosted = $request->wasPosted();
  56                 $this->mCreateaccount = $request->getCheck( 'wpCreateaccount' );
  57                 $this->mCreateaccountMail = $request->getCheck( 'wpCreateaccountMail' )
  58                                             && $wgEnableEmail;
  59                 $this->mMailmypassword = $request->getCheck( 'wpMailmypassword' )
  60                                          && $wgEnableEmail;
  61                 $this->mLoginattempt = $request->getCheck( 'wpLoginattempt' );
  62                 $this->mAction = $request->getVal( 'action' );
  63                 $this->mRemember = $request->getCheck( 'wpRemember' );
  64                 $this->mLanguage = $request->getText( 'uselang' );
  65
  66                 if( $wgEnableEmail ) {
  67                         $this->mEmail = $request->getText( 'wpEmail' );
  68                 } else {
  69                         $this->mEmail = '';
  70                 }
  71                 if( $wgAllowRealName ) {
  72                     $this->mRealName = $request->getText( 'wpRealName' );
  73                 } else {
  74                     $this->mRealName = '';
  75                 }
  76
  77                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
  78                         $this->mDomain = 'invaliddomain';
  79                 }
  80                 $wgAuth->setDomain( $this->mDomain );
  81
  82                 # When switching accounts, it sucks to get automatically logged out
  83                 if( $this->mReturnTo == $wgLang->specialPage( 'Userlogout' ) ) {
  84                         $this->mReturnTo = '';
  85                 }
  86         }
  87
  88         function execute() {
  89                 if ( !is_null( $this->mCookieCheck ) ) {
  90                         $this->onCookieRedirectCheck( $this->mCookieCheck );
  91                         return;
  92                 } else if( $this->mPosted ) {
  93                         if( $this->mCreateaccount ) {
  94                                 return $this->addNewAccount();
  95                         } else if ( $this->mCreateaccountMail ) {
  96                                 return $this->addNewAccountMailPassword();
  97                         } else if ( $this->mMailmypassword ) {
  98                                 return $this->mailPassword();
  99                         } else if ( ( 'submitlogin' == $this->mAction ) || $this->mLoginattempt ) {
 100                                 return $this->processLogin();
 101                         }
 102                 }
 103                 $this->mainLoginForm( '' );
 104         }
 105
 106         /**
 107          * @private
 108          */
 109         function addNewAccountMailPassword() {
 110                 global $wgOut;
 111
 112                 if ('' == $this->mEmail) {
 113                         $this->mainLoginForm( wfMsg( 'noemail', htmlspecialchars( $this->mName ) ) );
 114                         return;
 115                 }
 116
 117                 $u = $this->addNewaccountInternal();
 118
 119                 if ($u == NULL) {
 120                         return;
 121                 }
 122
 123                 // Wipe the initial password and mail a temporary one
 124                 $u->setPassword( null );
 125                 $u->saveSettings();
 126                 $result = $this->mailPasswordInternal( $u, false );
 127
 128                 wfRunHooks( 'AddNewAccount', array( $u ) );
 129
 130                 $wgOut->setPageTitle( wfMsg( 'accmailtitle' ) );
 131                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 132                 $wgOut->setArticleRelated( false );
 133
 134                 if( WikiError::isError( $result ) ) {
 135                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 136                 } else {
 137                         $wgOut->addWikiText( wfMsg( 'accmailtext', $u->getName(), $u->getEmail() ) );
 138                         $wgOut->returnToMain( false );
 139                 }
 140                 $u = 0;
 141         }
 142
 143
 144         /**
 145          * @private
 146          */
 147         function addNewAccount() {
 148                 global $wgUser, $wgEmailAuthentication;
 149
 150                 # Create the account and abort if there's a problem doing so
 151                 $u = $this->addNewAccountInternal();
 152                 if( $u == NULL )
 153                         return;
 154
 155                 # If we showed up language selection links, and one was in use, be
 156                 # smart (and sensible) and save that language as the user's preference
 157                 global $wgLoginLanguageSelector;
 158                 if( $wgLoginLanguageSelector && $this->mLanguage )
 159                         $u->setOption( 'language', $this->mLanguage );
 160
 161                 # Save user settings and send out an email authentication message if needed
 162                 $u->saveSettings();
 163                 if( $wgEmailAuthentication && User::isValidEmailAddr( $u->getEmail() ) ) {
 164                         global $wgOut;
 165                         $error = $u->sendConfirmationMail();
 166                         if( WikiError::isError( $error ) ) {
 167                                 $wgOut->addWikiText( wfMsg( 'confirmemail_sendfailed', $error->getMessage() ) );
 168                         } else {
 169                                 $wgOut->addWikiText( wfMsg( 'confirmemail_oncreate' ) );
 170                         }
 171                 }
 172
 173                 # If not logged in, assume the new account as the current one and set session cookies
 174                 # then show a "welcome" message or a "need cookies" message as needed
 175                 if( $wgUser->isAnon() ) {
 176                         $wgUser = $u;
 177                         $wgUser->setCookies();
 178                         wfRunHooks( 'AddNewAccount', array( $wgUser ) );
 179                         if( $this->hasSessionCookie() ) {
 180                                 return $this->successfulLogin( wfMsg( 'welcomecreation', $wgUser->getName() ), false );
 181                         } else {
 182                                 return $this->cookieRedirectCheck( 'new' );
 183                         }
 184                 } else {
 185                         # Confirm that the account was created
 186                         global $wgOut;
 187                         $self = SpecialPage::getTitleFor( 'Userlogin' );
 188                         $wgOut->setPageTitle( wfMsgHtml( 'accountcreated' ) );
 189                         $wgOut->setArticleRelated( false );
 190                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 191                         $wgOut->addHtml( wfMsgWikiHtml( 'accountcreatedtext', $u->getName() ) );
 192                         $wgOut->returnToMain( $self->getPrefixedText() );
 193                         wfRunHooks( 'AddNewAccount', array( $u ) );
 194                         return true;
 195                 }
 196         }
 197
 198         /**
 199          * @private
 200          */
 201         function addNewAccountInternal() {
 202                 global $wgUser, $wgOut;
 203                 global $wgEnableSorbs, $wgProxyWhitelist;
 204                 global $wgMemc, $wgAccountCreationThrottle;
 205                 global $wgAuth, $wgMinimalPasswordLength;
 206
 207                 // If the user passes an invalid domain, something is fishy
 208                 if( !$wgAuth->validDomain( $this->mDomain ) ) {
 209                         $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 210                         return false;
 211                 }
 212
 213                 // If we are not allowing users to login locally, we should
 214                 // be checking to see if the user is actually able to
 215                 // authenticate to the authentication server before they
 216                 // create an account (otherwise, they can create a local account
 217                 // and login as any domain user). We only need to check this for
 218                 // domains that aren't local.
 219                 if( 'local' != $this->mDomain && '' != $this->mDomain ) {
 220                         if( !$wgAuth->canCreateAccounts() && ( !$wgAuth->userExists( $this->mName ) || !$wgAuth->authenticate( $this->mName, $this->mPassword ) ) ) {
 221                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 222                                 return false;
 223                         }
 224                 }
 225
 226                 if ( wfReadOnly() ) {
 227                         $wgOut->readOnlyPage();
 228                         return false;
 229                 }
 230
 231                 if (!$wgUser->isAllowedToCreateAccount()) {
 232                         $this->userNotPrivilegedMessage();
 233                         return false;
 234                 }
 235
 236                 $ip = wfGetIP();
 237                 if ( $wgEnableSorbs && !in_array( $ip, $wgProxyWhitelist ) &&
 238                   $wgUser->inSorbsBlacklist( $ip ) )
 239                 {
 240                         $this->mainLoginForm( wfMsg( 'sorbs_create_account_reason' ) . ' (' . htmlspecialchars( $ip ) . ')' );
 241                         return;
 242                 }
 243
 244                 $name = trim( $this->mName );
 245                 $u = User::newFromName( $name, 'creatable' );
 246                 if ( is_null( $u ) ) {
 247                         $this->mainLoginForm( wfMsg( 'noname' ) );
 248                         return false;
 249                 }
 250
 251                 if ( 0 != $u->idForName() ) {
 252                         $this->mainLoginForm( wfMsg( 'userexists' ) );
 253                         return false;
 254                 }
 255
 256                 if ( 0 != strcmp( $this->mPassword, $this->mRetype ) ) {
 257                         $this->mainLoginForm( wfMsg( 'badretype' ) );
 258                         return false;
 259                 }
 260
 261                 if ( !$wgUser->isValidPassword( $this->mPassword ) ) {
 262                         $this->mainLoginForm( wfMsg( 'passwordtooshort', $wgMinimalPasswordLength ) );
 263                         return false;
 264                 }
 265
 266                 $abortError = '';
 267                 if( !wfRunHooks( 'AbortNewAccount', array( $u, &$abortError ) ) ) {
 268                         // Hook point to add extra creation throttles and blocks
 269                         wfDebug( "LoginForm::addNewAccountInternal: a hook blocked creation\n" );
 270                         $this->mainLoginForm( $abortError );
 271                         return false;
 272                 }
 273
 274                 if ( $wgAccountCreationThrottle && $wgUser->isPingLimitable() ) {
 275                         $key = wfMemcKey( 'acctcreate', 'ip', $ip );
 276                         $value = $wgMemc->incr( $key );
 277                         if ( !$value ) {
 278                                 $wgMemc->set( $key, 1, 86400 );
 279                         }
 280                         if ( $value > $wgAccountCreationThrottle ) {
 281                                 $this->throttleHit( $wgAccountCreationThrottle );
 282                                 return false;
 283                         }
 284                 }
 285
 286                 if( !$wgAuth->addUser( $u, $this->mPassword, $this->mEmail, $this->mRealName ) ) {
 287                         $this->mainLoginForm( wfMsg( 'externaldberror' ) );
 288                         return false;
 289                 }
 290
 291                 return $this->initUser( $u );
 292         }
 293
 294         /**
 295          * Actually add a user to the database.
 296          * Give it a User object that has been initialised with a name.
 297          *
 298          * @param $u User object.
 299          * @return User object.
 300          * @private
 301          */
 302         function initUser( $u ) {
 303                 global $wgAuth;
 304
 305                 $u->addToDatabase();
 306
 307                 if ( $wgAuth->allowPasswordChange() ) {
 308                         $u->setPassword( $this->mPassword );
 309                 }
 310
 311                 $u->setEmail( $this->mEmail );
 312                 $u->setRealName( $this->mRealName );
 313                 $u->setToken();
 314
 315                 $wgAuth->initUser( $u );
 316
 317                 $u->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 318                 $u->saveSettings();
 319
 320                 # Update user count
 321                 $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
 322                 $ssUpdate->doUpdate();
 323
 324                 return $u;
 325         }
 326
 327         /**
 328          * Internally authenticate the login request.
 329          *
 330          * This may create a local account as a side effect if the
 331          * authentication plugin allows transparent local account
 332          * creation.
 333          *
 334          * @public
 335          */
 336         function authenticateUserData() {
 337                 global $wgUser, $wgAuth;
 338                 if ( '' == $this->mName ) {
 339                         return self::NO_NAME;
 340                 }
 341                 $u = User::newFromName( $this->mName );
 342                 if( is_null( $u ) || !User::isUsableName( $u->getName() ) ) {
 343                         return self::ILLEGAL;
 344                 }
 345                 if ( 0 == $u->getID() ) {
 346                         global $wgAuth;
 347                         /**
 348                          * If the external authentication plugin allows it,
 349                          * automatically create a new account for users that
 350                          * are externally defined but have not yet logged in.
 351                          */
 352                         if ( $wgAuth->autoCreate() && $wgAuth->userExists( $u->getName() ) ) {
 353                                 if ( $wgAuth->authenticate( $u->getName(), $this->mPassword ) ) {
 354                                         $u = $this->initUser( $u );
 355                                 } else {
 356                                         return self::WRONG_PLUGIN_PASS;
 357                                 }
 358                         } else {
 359                                 return self::NOT_EXISTS;
 360                         }
 361                 } else {
 362                         $u->load();
 363                 }
 364
 365                 if (!$u->checkPassword( $this->mPassword )) {
 366                         if( $u->checkTemporaryPassword( $this->mPassword ) ) {
 367                                 // The e-mailed temporary password should not be used
 368                                 // for actual logins; that's a very sloppy habit,
 369                                 // and insecure if an attacker has a few seconds to
 370                                 // click "search" on someone's open mail reader.
 371                                 //
 372                                 // Allow it to be used only to reset the password
 373                                 // a single time to a new value, which won't be in
 374                                 // the user's e-mail archives.
 375                                 //
 376                                 // For backwards compatibility, we'll still recognize
 377                                 // it at the login form to minimize surprises for
 378                                 // people who have been logging in with a temporary
 379                                 // password for some time.
 380                                 //
 381                                 // As a side-effect, we can authenticate the user's
 382                                 // e-mail address if it's not already done, since
 383                                 // the temporary password was sent via e-mail.
 384                                 //
 385                                 if( !$u->isEmailConfirmed() ) {
 386                                         $u->confirmEmail();
 387                                 }
 388
 389                                 // At this point we just return an appropriate code
 390                                 // indicating that the UI should show a password
 391                                 // reset form; bot interfaces etc will probably just
 392                                 // fail cleanly here.
 393                                 //
 394                                 return self::RESET_PASS;
 395                         } else {
 396                                 return '' == $this->mPassword ? self::EMPTY_PASS : self::WRONG_PASS;
 397                         }
 398                 } else {
 399                         $wgAuth->updateUser( $u );
 400                         $wgUser = $u;
 401
 402                         return self::SUCCESS;
 403                 }
 404         }
 405
 406         function processLogin() {
 407                 global $wgUser, $wgAuth;
 408
 409                 switch ($this->authenticateUserData())
 410                 {
 411                         case self::SUCCESS:
 412                                 # We've verified now, update the real record
 413                                 if( (bool)$this->mRemember != (bool)$wgUser->getOption( 'rememberpassword' ) ) {
 414                                         $wgUser->setOption( 'rememberpassword', $this->mRemember ? 1 : 0 );
 415                                         $wgUser->saveSettings();
 416                                 } else {
 417                                         $wgUser->invalidateCache();
 418                                 }
 419                                 $wgUser->setCookies();
 420
 421                                 if( $this->hasSessionCookie() ) {
 422                                         return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
 423                                 } else {
 424                                         return $this->cookieRedirectCheck( 'login' );
 425                                 }
 426                                 break;
 427
 428                         case self::NO_NAME:
 429                         case self::ILLEGAL:
 430                                 $this->mainLoginForm( wfMsg( 'noname' ) );
 431                                 break;
 432                         case self::WRONG_PLUGIN_PASS:
 433                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 434                                 break;
 435                         case self::NOT_EXISTS:
 436                                 $this->mainLoginForm( wfMsg( 'nosuchuser', htmlspecialchars( $this->mName ) ) );
 437                                 break;
 438                         case self::WRONG_PASS:
 439                                 $this->mainLoginForm( wfMsg( 'wrongpassword' ) );
 440                                 break;
 441                         case self::EMPTY_PASS:
 442                                 $this->mainLoginForm( wfMsg( 'wrongpasswordempty' ) );
 443                                 break;
 444                         case self::RESET_PASS:
 445                                 $this->resetLoginForm( wfMsg( 'resetpass_announce' ) );
 446                                 break;
 447                         default:
 448                                 wfDebugDieBacktrace( "Unhandled case value" );
 449                 }
 450         }
 451
 452         function resetLoginForm( $error ) {
 453                 global $wgOut;
 454                 $wgOut->addWikiText( "<div class=\"errorbox\">$error</div>" );
 455                 $reset = new PasswordResetForm( $this->mName, $this->mPassword );
 456                 $reset->execute();
 457         }
 458
 459         /**
 460          * @private
 461          */
 462         function mailPassword() {
 463                 global $wgUser, $wgOut, $wgAuth;
 464
 465                 if( !$wgAuth->allowPasswordChange() ) {
 466                         $this->mainLoginForm( wfMsg( 'resetpass_forbidden' ) );
 467                         return;
 468                 }
 469
 470                 # Check against blocked IPs
 471                 # fixme -- should we not?
 472                 if( $wgUser->isBlocked() ) {
 473                         $this->mainLoginForm( wfMsg( 'blocked-mailpassword' ) );
 474                         return;
 475                 }
 476
 477                 # Check against the rate limiter
 478                 if( $wgUser->pingLimiter( 'mailpassword' ) ) {
 479                         $wgOut->rateLimited();
 480                         return;
 481                 }
 482
 483                 if ( '' == $this->mName ) {
 484                         $this->mainLoginForm( wfMsg( 'noname' ) );
 485                         return;
 486                 }
 487                 $u = User::newFromName( $this->mName );
 488                 if( is_null( $u ) ) {
 489                         $this->mainLoginForm( wfMsg( 'noname' ) );
 490                         return;
 491                 }
 492                 if ( 0 == $u->getID() ) {
 493                         $this->mainLoginForm( wfMsg( 'nosuchuser', $u->getName() ) );
 494                         return;
 495                 }
 496
 497                 # Check against password throttle
 498                 if ( $u->isPasswordReminderThrottled() ) {
 499                         global $wgPasswordReminderResendTime;
 500                         # Round the time in hours to 3 d.p., in case someone is specifying minutes or seconds.
 501                         $this->mainLoginForm( wfMsg( 'throttled-mailpassword',
 502                                 round( $wgPasswordReminderResendTime, 3 ) ) );
 503                         return;
 504                 }
 505
 506                 $result = $this->mailPasswordInternal( $u, true );
 507                 if( WikiError::isError( $result ) ) {
 508                         $this->mainLoginForm( wfMsg( 'mailerror', $result->getMessage() ) );
 509                 } else {
 510                         $this->mainLoginForm( wfMsg( 'passwordsent', $u->getName() ), 'success' );
 511                 }
 512         }
 513
 514
 515         /**
 516          * @return mixed true on success, WikiError on failure
 517          * @private
 518          */
 519         function mailPasswordInternal( $u, $throttle = true ) {
 520                 global $wgCookiePath, $wgCookieDomain, $wgCookiePrefix, $wgCookieSecure;
 521                 global $wgServer, $wgScript;
 522
 523                 if ( '' == $u->getEmail() ) {
 524                         return new WikiError( wfMsg( 'noemail', $u->getName() ) );
 525                 }
 526
 527                 $np = $u->randomPassword();
 528                 $u->setNewpassword( $np, $throttle );
 529
 530                 setcookie( "{$wgCookiePrefix}Token", '', time() - 3600, $wgCookiePath, $wgCookieDomain, $wgCookieSecure );
 531
 532                 $u->saveSettings();
 533
 534                 $ip = wfGetIP();
 535                 if ( '' == $ip ) { $ip = '(Unknown)'; }
 536
 537                 $m = wfMsg( 'passwordremindertext', $ip, $u->getName(), $np, $wgServer . $wgScript );
 538
 539                 $result = $u->sendMail( wfMsg( 'passwordremindertitle' ), $m );
 540                 return $result;
 541         }
 542
 543
 544         /**
 545          * @param string $msg Message that will be shown on success
 546          * @param bool $auto Toggle auto-redirect to main page; default true
 547          * @private
 548          */
 549         function successfulLogin( $msg, $auto = true ) {
 550                 global $wgUser;
 551                 global $wgOut;
 552
 553                 # Run any hooks; ignore results
 554
 555                 wfRunHooks('UserLoginComplete', array(&$wgUser));
 556
 557                 $wgOut->setPageTitle( wfMsg( 'loginsuccesstitle' ) );
 558                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 559                 $wgOut->setArticleRelated( false );
 560                 $wgOut->addWikiText( $msg );
 561                 if ( !empty( $this->mReturnTo ) ) {
 562                         $wgOut->returnToMain( $auto, $this->mReturnTo );
 563                 } else {
 564                         $wgOut->returnToMain( $auto );
 565                 }
 566         }
 567
 568         /** */
 569         function userNotPrivilegedMessage() {
 570                 global $wgOut;
 571
 572                 $wgOut->setPageTitle( wfMsg( 'whitelistacctitle' ) );
 573                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 574                 $wgOut->setArticleRelated( false );
 575
 576                 $wgOut->addWikiText( wfMsg( 'whitelistacctext' ) );
 577
 578                 $wgOut->returnToMain( false );
 579         }
 580
 581         /** */
 582         function userBlockedMessage() {
 583                 global $wgOut;
 584
 585                 # Let's be nice about this, it's likely that this feature will be used
 586                 # for blocking large numbers of innocent people, e.g. range blocks on
 587                 # schools. Don't blame it on the user. There's a small chance that it
 588                 # really is the user's fault, i.e. the username is blocked and they
 589                 # haven't bothered to log out before trying to create an account to
 590                 # evade it, but we'll leave that to their guilty conscience to figure
 591                 # out.
 592
 593                 $wgOut->setPageTitle( wfMsg( 'cantcreateaccounttitle' ) );
 594                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 595                 $wgOut->setArticleRelated( false );
 596
 597                 $ip = wfGetIP();
 598                 $wgOut->addWikiText( wfMsg( 'cantcreateaccounttext', $ip ) );
 599                 $wgOut->returnToMain( false );
 600         }
 601
 602         /**
 603          * @private
 604          */
 605         function mainLoginForm( $msg, $msgtype = 'error' ) {
 606                 global $wgUser, $wgOut, $wgAllowRealName, $wgEnableEmail;
 607                 global $wgCookiePrefix, $wgAuth, $wgLoginLanguageSelector;
 608                 global $wgAuth;
 609
 610                 if ( $this->mType == 'signup' ) {
 611                         if ( !$wgUser->isAllowed( 'createaccount' ) ) {
 612                                 $this->userNotPrivilegedMessage();
 613                                 return;
 614                         } elseif ( $wgUser->isBlockedFromCreateAccount() ) {
 615                                 $this->userBlockedMessage();
 616                                 return;
 617                         }
 618                 }
 619
 620                 if ( '' == $this->mName ) {
 621                         if ( $wgUser->isLoggedIn() ) {
 622                                 $this->mName = $wgUser->getName();
 623                         } else {
 624                                 $this->mName = isset( $_COOKIE[$wgCookiePrefix.'UserName'] ) ? $_COOKIE[$wgCookiePrefix.'UserName'] : null;
 625                         }
 626                 }
 627
 628                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 629
 630                 if ( $this->mType == 'signup' ) {
 631                         $template = new UsercreateTemplate();
 632                         $q = 'action=submitlogin&type=signup';
 633                         $linkq = 'type=login';
 634                         $linkmsg = 'gotaccount';
 635                 } else {
 636                         $template = new UserloginTemplate();
 637                         $q = 'action=submitlogin&type=login';
 638                         $linkq = 'type=signup';
 639                         $linkmsg = 'nologin';
 640                 }
 641
 642                 if ( !empty( $this->mReturnTo ) ) {
 643                         $returnto = '&returnto=' . wfUrlencode( $this->mReturnTo );
 644                         $q .= $returnto;
 645                         $linkq .= $returnto;
 646                 }
 647
 648                 # Pass any language selection on to the mode switch link
 649                 if( $wgLoginLanguageSelector && $this->mLanguage )
 650                         $linkq .= '&uselang=' . $this->mLanguage;
 651
 652                 $link = '<a href="' . htmlspecialchars ( $titleObj->getLocalUrl( $linkq ) ) . '">';
 653                 $link .= wfMsgHtml( $linkmsg . 'link' );
 654                 $link .= '</a>';
 655
 656                 # Don't show a "create account" link if the user can't
 657                 if( $this->showCreateOrLoginLink( $wgUser ) )
 658                         $template->set( 'link', wfMsgHtml( $linkmsg, $link ) );
 659                 else
 660                         $template->set( 'link', '' );
 661
 662                 $template->set( 'header', '' );
 663                 $template->set( 'name', $this->mName );
 664                 $template->set( 'password', $this->mPassword );
 665                 $template->set( 'retype', $this->mRetype );
 666                 $template->set( 'email', $this->mEmail );
 667                 $template->set( 'realname', $this->mRealName );
 668                 $template->set( 'domain', $this->mDomain );
 669
 670                 $template->set( 'action', $titleObj->getLocalUrl( $q ) );
 671                 $template->set( 'message', $msg );
 672                 $template->set( 'messagetype', $msgtype );
 673                 $template->set( 'createemail', $wgEnableEmail && $wgUser->isLoggedIn() );
 674                 $template->set( 'userealname', $wgAllowRealName );
 675                 $template->set( 'useemail', $wgEnableEmail );
 676                 $template->set( 'canreset', $wgAuth->allowPasswordChange() );
 677                 $template->set( 'remember', $wgUser->getOption( 'rememberpassword' ) or $this->mRemember  );
 678
 679                 # Prepare language selection links as needed
 680                 if( $wgLoginLanguageSelector ) {
 681                         $template->set( 'languages', $this->makeLanguageSelector() );
 682                         if( $this->mLanguage )
 683                                 $template->set( 'uselang', $this->mLanguage );
 684                 }
 685
 686                 // Give authentication and captcha plugins a chance to modify the form
 687                 $wgAuth->modifyUITemplate( $template );
 688                 if ( $this->mType == 'signup' ) {
 689                         wfRunHooks( 'UserCreateForm', array( &$template ) );
 690                 } else {
 691                         wfRunHooks( 'UserLoginForm', array( &$template ) );
 692                 }
 693
 694                 $wgOut->setPageTitle( wfMsg( 'userlogin' ) );
 695                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 696                 $wgOut->setArticleRelated( false );
 697                 $wgOut->addTemplate( $template );
 698         }
 699
 700         /**
 701          * @private
 702          */
 703         function showCreateOrLoginLink( &$user ) {
 704                 if( $this->mType == 'signup' ) {
 705                         return( true );
 706                 } elseif( $user->isAllowed( 'createaccount' ) ) {
 707                         return( true );
 708                 } else {
 709                         return( false );
 710                 }
 711         }
 712
 713         /**
 714          * Check if a session cookie is present.
 715          *
 716          * This will not pick up a cookie set during _this_ request, but is
 717          * meant to ensure that the client is returning the cookie which was
 718          * set on a previous pass through the system.
 719          *
 720          * @private
 721          */
 722         function hasSessionCookie() {
 723                 global $wgDisableCookieCheck, $wgRequest;
 724                 return $wgDisableCookieCheck ? true : $wgRequest->checkSessionCookie();
 725         }
 726
 727         /**
 728          * @private
 729          */
 730         function cookieRedirectCheck( $type ) {
 731                 global $wgOut;
 732
 733                 $titleObj = SpecialPage::getTitleFor( 'Userlogin' );
 734                 $check = $titleObj->getFullURL( 'wpCookieCheck='.$type );
 735
 736                 return $wgOut->redirect( $check );
 737         }
 738
 739         /**
 740          * @private
 741          */
 742         function onCookieRedirectCheck( $type ) {
 743                 global $wgUser;
 744
 745                 if ( !$this->hasSessionCookie() ) {
 746                         if ( $type == 'new' ) {
 747                                 return $this->mainLoginForm( wfMsg( 'nocookiesnew' ) );
 748                         } else if ( $type == 'login' ) {
 749                                 return $this->mainLoginForm( wfMsg( 'nocookieslogin' ) );
 750                         } else {
 751                                 # shouldn't happen
 752                                 return $this->mainLoginForm( wfMsg( 'error' ) );
 753                         }
 754                 } else {
 755                         return $this->successfulLogin( wfMsg( 'loginsuccess', $wgUser->getName() ) );
 756                 }
 757         }
 758
 759         /**
 760          * @private
 761          */
 762         function throttleHit( $limit ) {
 763                 global $wgOut;
 764
 765                 $wgOut->addWikiText( wfMsg( 'acct_creation_throttle_hit', $limit ) );
 766         }
 767
 768         /**
 769          * Produce a bar of links which allow the user to select another language
 770          * during login/registration but retain "returnto"
 771          *
 772          * @return string
 773          */
 774         function makeLanguageSelector() {
 775                 $msg = wfMsgForContent( 'loginlanguagelinks' );
 776                 if( $msg != '' && !wfEmptyMsg( 'loginlanguagelinks', $msg ) ) {
 777                         $langs = explode( "\n", $msg );
 778                         $links = array();
 779                         foreach( $langs as $lang ) {
 780                                 $lang = trim( $lang, '* ' );
 781                                 $parts = explode( '|', $lang );
 782                                 $links[] = $this->makeLanguageSelectorLink( $parts[0], $parts[1] );
 783                         }
 784                         return count( $links ) > 0 ? wfMsgHtml( 'loginlanguagelabel', implode( ' | ', $links ) ) : '';
 785                 } else {
 786                         return '';
 787                 }
 788         }
 789
 790         /**
 791          * Create a language selector link for a particular language
 792          * Links back to this page preserving type and returnto
 793          *
 794          * @param $text Link text
 795          * @param $lang Language code
 796          */
 797         function makeLanguageSelectorLink( $text, $lang ) {
 798                 global $wgUser;
 799                 $self = SpecialPage::getTitleFor( 'Userlogin' );
 800                 $attr[] = 'uselang=' . $lang;
 801                 if( $this->mType == 'signup' )
 802                         $attr[] = 'type=signup';
 803                 if( $this->mReturnTo )
 804                         $attr[] = 'returnto=' . $this->mReturnTo;
 805                 $skin = $wgUser->getSkin();
 806                 return $skin->makeKnownLinkObj( $self, htmlspecialchars( $text ), implode( '&', $attr ) );
 807         }
 808 }
 809 ?>