includes/SpecialUserlogin.php

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