includes/specialpage/LoginSignupSpecialPage.php

   1 <?php
   2 /**
   3  * Holds shared logic for login and account creation pages.
   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 use MediaWiki\Auth\AuthenticationRequest;
  25 use MediaWiki\Auth\AuthenticationResponse;
  26 use MediaWiki\Auth\AuthManager;
  27 use MediaWiki\Logger\LoggerFactory;
  28 use MediaWiki\MediaWikiServices;
  29 use MediaWiki\Session\SessionManager;
  30 use Wikimedia\ScopedCallback;
  31
  32 /**
  33  * Holds shared logic for login and account creation pages.
  34  *
  35  * @ingroup SpecialPage
  36  */
  37 abstract class LoginSignupSpecialPage extends AuthManagerSpecialPage {
  38         protected $mReturnTo;
  39         protected $mPosted;
  40         protected $mAction;
  41         protected $mLanguage;
  42         protected $mReturnToQuery;
  43         protected $mToken;
  44         protected $mStickHTTPS;
  45         protected $mFromHTTP;
  46         protected $mEntryError = '';
  47         protected $mEntryErrorType = 'error';
  48
  49         protected $mLoaded = false;
  50         protected $mLoadedRequest = false;
  51         protected $mSecureLoginUrl;
  52
  53         /** @var string */
  54         protected $securityLevel;
  55
  56         /** @var bool True if the user if creating an account for someone else. Flag used for internal
  57          * communication, only set at the very end.
  58          */
  59         protected $proxyAccountCreation;
  60         /** @var User FIXME another flag for passing data. */
  61         protected $targetUser;
  62
  63         /** @var HTMLForm */
  64         protected $authForm;
  65
  66         abstract protected function isSignup();
  67
  68         /**
  69          * @param bool $direct True if the action was successful just now; false if that happened
  70          *    pre-redirection (so this handler was called already)
  71          * @param StatusValue|null $extraMessages
  72          * @return void
  73          */
  74         abstract protected function successfulAction( $direct = false, $extraMessages = null );
  75
  76         /**
  77          * Logs to the authmanager-stats channel.
  78          * @param bool $success
  79          * @param string|null $status Error message key
  80          */
  81         abstract protected function logAuthResult( $success, $status = null );
  82
  83         public function __construct( $name ) {
  84                 global $wgUseMediaWikiUIEverywhere;
  85                 parent::__construct( $name );
  86
  87                 // Override UseMediaWikiEverywhere to true, to force login and create form to use mw ui
  88                 $wgUseMediaWikiUIEverywhere = true;
  89         }
  90
  91         protected function setRequest( array $data, $wasPosted = null ) {
  92                 parent::setRequest( $data, $wasPosted );
  93                 $this->mLoadedRequest = false;
  94         }
  95
  96         /**
  97          * Load basic request parameters for this Special page.
  98          * @param string $subPage
  99          */
 100         private function loadRequestParameters( $subPage ) {
 101                 if ( $this->mLoadedRequest ) {
 102                         return;
 103                 }
 104                 $this->mLoadedRequest = true;
 105                 $request = $this->getRequest();
 106
 107                 $this->mPosted = $request->wasPosted();
 108                 $this->mIsReturn = $subPage === 'return';
 109                 $this->mAction = $request->getVal( 'action' );
 110                 $this->mFromHTTP = $request->getBool( 'fromhttp', false )
 111                         || $request->getBool( 'wpFromhttp', false );
 112                 $this->mStickHTTPS = ( !$this->mFromHTTP && $request->getProtocol() === 'https' )
 113                         || $request->getBool( 'wpForceHttps', false );
 114                 $this->mLanguage = $request->getText( 'uselang' );
 115                 $this->mReturnTo = $request->getVal( 'returnto', '' );
 116                 $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
 117         }
 118
 119         /**
 120          * Load data from request.
 121          * @private
 122          * @param string $subPage Subpage of Special:Userlogin
 123          */
 124         protected function load( $subPage ) {
 125                 global $wgSecureLogin;
 126
 127                 $this->loadRequestParameters( $subPage );
 128                 if ( $this->mLoaded ) {
 129                         return;
 130                 }
 131                 $this->mLoaded = true;
 132                 $request = $this->getRequest();
 133
 134                 $securityLevel = $this->getRequest()->getText( 'force' );
 135                 if (
 136                         $securityLevel && AuthManager::singleton()->securitySensitiveOperationStatus(
 137                                 $securityLevel ) === AuthManager::SEC_REAUTH
 138                 ) {
 139                         $this->securityLevel = $securityLevel;
 140                 }
 141
 142                 $this->loadAuth( $subPage );
 143
 144                 $this->mToken = $request->getVal( $this->getTokenName() );
 145
 146                 // Show an error or warning passed on from a previous page
 147                 $entryError = $this->msg( $request->getVal( 'error', '' ) );
 148                 $entryWarning = $this->msg( $request->getVal( 'warning', '' ) );
 149                 // bc: provide login link as a parameter for messages where the translation
 150                 // was not updated
 151                 $loginreqlink = $this->getLinkRenderer()->makeKnownLink(
 152                         $this->getPageTitle(),
 153                         $this->msg( 'loginreqlink' )->text(),
 154                         [],
 155                         [
 156                                 'returnto' => $this->mReturnTo,
 157                                 'returntoquery' => $this->mReturnToQuery,
 158                                 'uselang' => $this->mLanguage ?: null,
 159                                 'fromhttp' => $wgSecureLogin && $this->mFromHTTP ? '1' : null,
 160                         ]
 161                 );
 162
 163                 // Only show valid error or warning messages.
 164                 if ( $entryError->exists()
 165                         && in_array( $entryError->getKey(), LoginHelper::getValidErrorMessages(), true )
 166                 ) {
 167                         $this->mEntryErrorType = 'error';
 168                         $this->mEntryError = $entryError->rawParams( $loginreqlink )->parse();
 169
 170                 } elseif ( $entryWarning->exists()
 171                         && in_array( $entryWarning->getKey(), LoginHelper::getValidErrorMessages(), true )
 172                 ) {
 173                         $this->mEntryErrorType = 'warning';
 174                         $this->mEntryError = $entryWarning->rawParams( $loginreqlink )->parse();
 175                 }
 176
 177                 # 1. When switching accounts, it sucks to get automatically logged out
 178                 # 2. Do not return to PasswordReset after a successful password change
 179                 #    but goto Wiki start page (Main_Page) instead ( T35997 )
 180                 $returnToTitle = Title::newFromText( $this->mReturnTo );
 181                 if ( is_object( $returnToTitle )
 182                         && ( $returnToTitle->isSpecial( 'Userlogout' )
 183                                 || $returnToTitle->isSpecial( 'PasswordReset' ) )
 184                 ) {
 185                         $this->mReturnTo = '';
 186                         $this->mReturnToQuery = '';
 187                 }
 188         }
 189
 190         protected function getPreservedParams( $withToken = false ) {
 191                 global $wgSecureLogin;
 192
 193                 $params = parent::getPreservedParams( $withToken );
 194                 $params += [
 195                         'returnto' => $this->mReturnTo ?: null,
 196                         'returntoquery' => $this->mReturnToQuery ?: null,
 197                 ];
 198                 if ( $wgSecureLogin && !$this->isSignup() ) {
 199                         $params['fromhttp'] = $this->mFromHTTP ? '1' : null;
 200                 }
 201                 return $params;
 202         }
 203
 204         protected function beforeExecute( $subPage ) {
 205                 // finish initializing the class before processing the request - T135924
 206                 $this->loadRequestParameters( $subPage );
 207                 return parent::beforeExecute( $subPage );
 208         }
 209
 210         /**
 211          * @param string|null $subPage
 212          */
 213         public function execute( $subPage ) {
 214                 if ( $this->mPosted ) {
 215                         $time = microtime( true );
 216                         $profilingScope = new ScopedCallback( function () use ( $time ) {
 217                                 $time = microtime( true ) - $time;
 218                                 $statsd = MediaWikiServices::getInstance()->getStatsdDataFactory();
 219                                 $statsd->timing( "timing.login.ui.{$this->authAction}", $time * 1000 );
 220                         } );
 221                 }
 222
 223                 $authManager = AuthManager::singleton();
 224                 $session = SessionManager::getGlobalSession();
 225
 226                 // Session data is used for various things in the authentication process, so we must make
 227                 // sure a session cookie or some equivalent mechanism is set.
 228                 $session->persist();
 229
 230                 $this->load( $subPage );
 231                 $this->setHeaders();
 232                 $this->checkPermissions();
 233
 234                 // Make sure the system configuration allows log in / sign up
 235                 if ( !$this->isSignup() && !$authManager->canAuthenticateNow() ) {
 236                         if ( !$session->canSetUser() ) {
 237                                 throw new ErrorPageError( 'cannotloginnow-title', 'cannotloginnow-text', [
 238                                         $session->getProvider()->describe( RequestContext::getMain()->getLanguage() )
 239                                 ] );
 240                         }
 241                         throw new ErrorPageError( 'cannotlogin-title', 'cannotlogin-text' );
 242                 } elseif ( $this->isSignup() && !$authManager->canCreateAccounts() ) {
 243                         throw new ErrorPageError( 'cannotcreateaccount-title', 'cannotcreateaccount-text' );
 244                 }
 245
 246                 /*
 247                  * In the case where the user is already logged in, and was redirected to
 248                  * the login form from a page that requires login, do not show the login
 249                  * page. The use case scenario for this is when a user opens a large number
 250                  * of tabs, is redirected to the login page on all of them, and then logs
 251                  * in on one, expecting all the others to work properly.
 252                  *
 253                  * However, do show the form if it was visited intentionally (no 'returnto'
 254                  * is present). People who often switch between several accounts have grown
 255                  * accustomed to this behavior.
 256                  *
 257                  * Also make an exception when force=<level> is set in the URL, which means the user must
 258                  * reauthenticate for security reasons.
 259                  */
 260                 if ( !$this->isSignup() && !$this->mPosted && !$this->securityLevel &&
 261                          ( $this->mReturnTo !== '' || $this->mReturnToQuery !== '' ) &&
 262                          $this->getUser()->isLoggedIn()
 263                 ) {
 264                         $this->successfulAction();
 265                         return;
 266                 }
 267
 268                 // If logging in and not on HTTPS, either redirect to it or offer a link.
 269                 global $wgSecureLogin;
 270                 if ( $this->getRequest()->getProtocol() !== 'https' ) {
 271                         $title = $this->getFullTitle();
 272                         $query = $this->getPreservedParams( false ) + [
 273                                         'title' => null,
 274                                         ( $this->mEntryErrorType === 'error' ? 'error'
 275                                                 : 'warning' ) => $this->mEntryError,
 276                                 ] + $this->getRequest()->getQueryValues();
 277                         $url = $title->getFullURL( $query, false, PROTO_HTTPS );
 278                         if ( $wgSecureLogin && !$this->mFromHTTP &&
 279                                  wfCanIPUseHTTPS( $this->getRequest()->getIP() )
 280                         ) {
 281                                 // Avoid infinite redirect
 282                                 $url = wfAppendQuery( $url, 'fromhttp=1' );
 283                                 $this->getOutput()->redirect( $url );
 284                                 // Since we only do this redir to change proto, always vary
 285                                 $this->getOutput()->addVaryHeader( 'X-Forwarded-Proto' );
 286
 287                                 return;
 288                         } else {
 289                                 // A wiki without HTTPS login support should set $wgServer to
 290                                 // http://somehost, in which case the secure URL generated
 291                                 // above won't actually start with https://
 292                                 if ( substr( $url, 0, 8 ) === 'https://' ) {
 293                                         $this->mSecureLoginUrl = $url;
 294                                 }
 295                         }
 296                 }
 297
 298                 if ( !$this->isActionAllowed( $this->authAction ) ) {
 299                         // FIXME how do we explain this to the user? can we handle session loss better?
 300                         // messages used: authpage-cannot-login, authpage-cannot-login-continue,
 301                         // authpage-cannot-create, authpage-cannot-create-continue
 302                         $this->mainLoginForm( [], 'authpage-cannot-' . $this->authAction );
 303                         return;
 304                 }
 305
 306                 if ( $this->canBypassForm( $button_name ) ) {
 307                         $this->setRequest( [], true );
 308                         $this->getRequest()->setVal( $this->getTokenName(), $this->getToken() );
 309                         if ( $button_name ) {
 310                                 $this->getRequest()->setVal( $button_name, true );
 311                         }
 312                 }
 313
 314                 $status = $this->trySubmit();
 315
 316                 if ( !$status || !$status->isGood() ) {
 317                         $this->mainLoginForm( $this->authRequests, $status ? $status->getMessage() : '', 'error' );
 318                         return;
 319                 }
 320
 321                 /** @var AuthenticationResponse $response */
 322                 $response = $status->getValue();
 323
 324                 $returnToUrl = $this->getPageTitle( 'return' )
 325                         ->getFullURL( $this->getPreservedParams( true ), false, PROTO_HTTPS );
 326                 switch ( $response->status ) {
 327                         case AuthenticationResponse::PASS:
 328                                 $this->logAuthResult( true );
 329                                 $this->proxyAccountCreation = $this->isSignup() && !$this->getUser()->isAnon();
 330                                 $this->targetUser = User::newFromName( $response->username );
 331
 332                                 if (
 333                                         !$this->proxyAccountCreation
 334                                         && $response->loginRequest
 335                                         && $authManager->canAuthenticateNow()
 336                                 ) {
 337                                         // successful registration; log the user in instantly
 338                                         $response2 = $authManager->beginAuthentication( [ $response->loginRequest ],
 339                                                 $returnToUrl );
 340                                         if ( $response2->status !== AuthenticationResponse::PASS ) {
 341                                                 LoggerFactory::getInstance( 'login' )
 342                                                         ->error( 'Could not log in after account creation' );
 343                                                 $this->successfulAction( true, Status::newFatal( 'createacct-loginerror' ) );
 344                                                 break;
 345                                         }
 346                                 }
 347
 348                                 if ( !$this->proxyAccountCreation ) {
 349                                         // Ensure that the context user is the same as the session user.
 350                                         $this->setSessionUserForCurrentRequest();
 351                                 }
 352
 353                                 $this->successfulAction( true );
 354                                 break;
 355                         case AuthenticationResponse::FAIL:
 356                                 // fall through
 357                         case AuthenticationResponse::RESTART:
 358                                 unset( $this->authForm );
 359                                 if ( $response->status === AuthenticationResponse::FAIL ) {
 360                                         $action = $this->getDefaultAction( $subPage );
 361                                         $messageType = 'error';
 362                                 } else {
 363                                         $action = $this->getContinueAction( $this->authAction );
 364                                         $messageType = 'warning';
 365                                 }
 366                                 $this->logAuthResult( false, $response->message ? $response->message->getKey() : '-' );
 367                                 $this->loadAuth( $subPage, $action, true );
 368                                 $this->mainLoginForm( $this->authRequests, $response->message, $messageType );
 369                                 break;
 370                         case AuthenticationResponse::REDIRECT:
 371                                 unset( $this->authForm );
 372                                 $this->getOutput()->redirect( $response->redirectTarget );
 373                                 break;
 374                         case AuthenticationResponse::UI:
 375                                 unset( $this->authForm );
 376                                 $this->authAction = $this->isSignup() ? AuthManager::ACTION_CREATE_CONTINUE
 377                                         : AuthManager::ACTION_LOGIN_CONTINUE;
 378                                 $this->authRequests = $response->neededRequests;
 379                                 $this->mainLoginForm( $response->neededRequests, $response->message, $response->messageType );
 380                                 break;
 381                         default:
 382                                 throw new LogicException( 'invalid AuthenticationResponse' );
 383                 }
 384         }
 385
 386         /**
 387          * Determine if the login form can be bypassed. This will be the case when no more than one
 388          * button is present and no other user input fields that are not marked as 'skippable' are
 389          * present. If the login form were not bypassed, the user would be presented with a
 390          * superfluous page on which they must press the single button to proceed with login.
 391          * Not only does this cause an additional mouse click and page load, it confuses users,
 392          * especially since there are a help link and forgotten password link that are
 393          * provided on the login page that do not apply to this situation.
 394          *
 395          * @param string|null &$button_name if the form has a single button, returns
 396          *   the name of the button; otherwise, returns null
 397          * @return bool
 398          */
 399         private function canBypassForm( &$button_name ) {
 400                 $button_name = null;
 401                 if ( $this->isContinued() ) {
 402                         return false;
 403                 }
 404                 $fields = AuthenticationRequest::mergeFieldInfo( $this->authRequests );
 405                 foreach ( $fields as $fieldname => $field ) {
 406                         if ( !isset( $field['type'] ) ) {
 407                                 return false;
 408                         }
 409                         if ( !empty( $field['skippable'] ) ) {
 410                                 continue;
 411                         }
 412                         if ( $field['type'] === 'button' ) {
 413                                 if ( $button_name !== null ) {
 414                                         $button_name = null;
 415                                         return false;
 416                                 } else {
 417                                         $button_name = $fieldname;
 418                                 }
 419                         } elseif ( $field['type'] !== 'null' ) {
 420                                 return false;
 421                         }
 422                 }
 423                 return true;
 424         }
 425
 426         /**
 427          * Show the success page.
 428          *
 429          * @param string $type Condition of return to; see `executeReturnTo`
 430          * @param string|Message $title Page's title
 431          * @param string $msgname
 432          * @param string $injected_html
 433          * @param StatusValue|null $extraMessages
 434          */
 435         protected function showSuccessPage(
 436                 $type, $title, $msgname, $injected_html, $extraMessages
 437         ) {
 438                 $out = $this->getOutput();
 439                 $out->setPageTitle( $title );
 440                 if ( $msgname ) {
 441                         $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
 442                 }
 443                 if ( $extraMessages ) {
 444                         $extraMessages = Status::wrap( $extraMessages );
 445                         $out->addWikiTextAsInterface( $extraMessages->getWikiText() );
 446                 }
 447
 448                 $out->addHTML( $injected_html );
 449
 450                 $helper = new LoginHelper( $this->getContext() );
 451                 $helper->showReturnToPage( $type, $this->mReturnTo, $this->mReturnToQuery, $this->mStickHTTPS );
 452         }
 453
 454         /**
 455          * Add a "return to" link or redirect to it.
 456          * Extensions can use this to reuse the "return to" logic after
 457          * inject steps (such as redirection) into the login process.
 458          *
 459          * @param string $type One of the following:
 460          *    - error: display a return to link ignoring $wgRedirectOnLogin
 461          *    - signup: display a return to link using $wgRedirectOnLogin if needed
 462          *    - success: display a return to link using $wgRedirectOnLogin if needed
 463          *    - successredirect: send an HTTP redirect using $wgRedirectOnLogin if needed
 464          * @param string $returnTo
 465          * @param array|string $returnToQuery
 466          * @param bool $stickHTTPS Keep redirect link on HTTPS
 467          * @since 1.22
 468          */
 469         public function showReturnToPage(
 470                 $type, $returnTo = '', $returnToQuery = '', $stickHTTPS = false
 471         ) {
 472                 $helper = new LoginHelper( $this->getContext() );
 473                 $helper->showReturnToPage( $type, $returnTo, $returnToQuery, $stickHTTPS );
 474         }
 475
 476         /**
 477          * Replace some globals to make sure the fact that the user has just been logged in is
 478          * reflected in the current request.
 479          */
 480         protected function setSessionUserForCurrentRequest() {
 481                 global $wgUser, $wgLang;
 482
 483                 $context = RequestContext::getMain();
 484                 $localContext = $this->getContext();
 485                 if ( $context !== $localContext ) {
 486                         // remove AuthManagerSpecialPage context hack
 487                         $this->setContext( $context );
 488                 }
 489
 490                 $user = $context->getRequest()->getSession()->getUser();
 491
 492                 $wgUser = $user;
 493                 $context->setUser( $user );
 494
 495                 $wgLang = $context->getLanguage();
 496         }
 497
 498         /**
 499          * @param AuthenticationRequest[] $requests A list of AuthorizationRequest objects,
 500          *   used to generate the form fields. An empty array means a fatal error
 501          *   (authentication cannot continue).
 502          * @param string|Message $msg
 503          * @param string $msgtype
 504          * @throws ErrorPageError
 505          * @throws Exception
 506          * @throws FatalError
 507          * @throws MWException
 508          * @throws PermissionsError
 509          * @throws ReadOnlyError
 510          * @private
 511          */
 512         protected function mainLoginForm( array $requests, $msg = '', $msgtype = 'error' ) {
 513                 $user = $this->getUser();
 514                 $out = $this->getOutput();
 515
 516                 // FIXME how to handle empty $requests - restart, or no form, just an error message?
 517                 // no form would be better for no session type errors, restart is better when can* fails.
 518                 if ( !$requests ) {
 519                         $this->authAction = $this->getDefaultAction( $this->subPage );
 520                         $this->authForm = null;
 521                         $requests = AuthManager::singleton()->getAuthenticationRequests( $this->authAction, $user );
 522                 }
 523
 524                 // Generic styles and scripts for both login and signup form
 525                 $out->addModuleStyles( [
 526                         'mediawiki.ui',
 527                         'mediawiki.ui.button',
 528                         'mediawiki.ui.checkbox',
 529                         'mediawiki.ui.input',
 530                         'mediawiki.special.userlogin.common.styles'
 531                 ] );
 532                 if ( $this->isSignup() ) {
 533                         // XXX hack pending RL or JS parse() support for complex content messages T27349
 534                         $out->addJsConfigVars( 'wgCreateacctImgcaptchaHelp',
 535                                 $this->msg( 'createacct-imgcaptcha-help' )->parse() );
 536
 537                         // Additional styles and scripts for signup form
 538                         $out->addModules( [
 539                                 'mediawiki.special.userlogin.signup.js'
 540                         ] );
 541                         $out->addModuleStyles( [
 542                                 'mediawiki.special.userlogin.signup.styles'
 543                         ] );
 544                 } else {
 545                         // Additional styles for login form
 546                         $out->addModuleStyles( [
 547                                 'mediawiki.special.userlogin.login.styles'
 548                         ] );
 549                 }
 550                 $out->disallowUserJs(); // just in case...
 551
 552                 $form = $this->getAuthForm( $requests, $this->authAction, $msg, $msgtype );
 553                 $form->prepareForm();
 554
 555                 $submitStatus = Status::newGood();
 556                 if ( $msg && $msgtype === 'warning' ) {
 557                         $submitStatus->warning( $msg );
 558                 } elseif ( $msg && $msgtype === 'error' ) {
 559                         $submitStatus->fatal( $msg );
 560                 }
 561
 562                 // warning header for non-standard workflows (e.g. security reauthentication)
 563                 if (
 564                         !$this->isSignup() &&
 565                         $this->getUser()->isLoggedIn() &&
 566                         $this->authAction !== AuthManager::ACTION_LOGIN_CONTINUE
 567                 ) {
 568                         $reauthMessage = $this->securityLevel ? 'userlogin-reauth' : 'userlogin-loggedin';
 569                         $submitStatus->warning( $reauthMessage, $this->getUser()->getName() );
 570                 }
 571
 572                 $formHtml = $form->getHTML( $submitStatus );
 573
 574                 $out->addHTML( $this->getPageHtml( $formHtml ) );
 575         }
 576
 577         /**
 578          * Add page elements which are outside the form.
 579          * FIXME this should probably be a template, but use a sane language (handlebars?)
 580          * @param string $formHtml
 581          * @return string
 582          */
 583         protected function getPageHtml( $formHtml ) {
 584                 global $wgLoginLanguageSelector;
 585
 586                 $loginPrompt = $this->isSignup() ? '' : Html::rawElement( 'div',
 587                         [ 'id' => 'userloginprompt' ], $this->msg( 'loginprompt' )->parseAsBlock() );
 588                 $languageLinks = $wgLoginLanguageSelector ? $this->makeLanguageSelector() : '';
 589                 $signupStartMsg = $this->msg( 'signupstart' );
 590                 $signupStart = ( $this->isSignup() && !$signupStartMsg->isDisabled() )
 591                         ? Html::rawElement( 'div', [ 'id' => 'signupstart' ], $signupStartMsg->parseAsBlock() ) : '';
 592                 if ( $languageLinks ) {
 593                         $languageLinks = Html::rawElement( 'div', [ 'id' => 'languagelinks' ],
 594                                 Html::rawElement( 'p', [], $languageLinks )
 595                         );
 596                 }
 597
 598                 $benefitsContainer = '';
 599                 if ( $this->isSignup() && $this->showExtraInformation() ) {
 600                         // messages used:
 601                         // createacct-benefit-icon1 createacct-benefit-head1 createacct-benefit-body1
 602                         // createacct-benefit-icon2 createacct-benefit-head2 createacct-benefit-body2
 603                         // createacct-benefit-icon3 createacct-benefit-head3 createacct-benefit-body3
 604                         $benefitCount = 3;
 605                         $benefitList = '';
 606                         for ( $benefitIdx = 1; $benefitIdx <= $benefitCount; $benefitIdx++ ) {
 607                                 $headUnescaped = $this->msg( "createacct-benefit-head$benefitIdx" )->text();
 608                                 $iconClass = $this->msg( "createacct-benefit-icon$benefitIdx" )->text();
 609                                 $benefitList .= Html::rawElement( 'div', [ 'class' => "mw-number-text $iconClass" ],
 610                                         Html::rawElement( 'h3', [],
 611                                                 $this->msg( "createacct-benefit-head$benefitIdx" )->escaped()
 612                                         )
 613                                         . Html::rawElement( 'p', [],
 614                                                 $this->msg( "createacct-benefit-body$benefitIdx" )->params( $headUnescaped )->escaped()
 615                                         )
 616                                 );
 617                         }
 618                         $benefitsContainer = Html::rawElement( 'div', [ 'class' => 'mw-createacct-benefits-container' ],
 619                                 Html::rawElement( 'h2', [], $this->msg( 'createacct-benefit-heading' )->escaped() )
 620                                 . Html::rawElement( 'div', [ 'class' => 'mw-createacct-benefits-list' ],
 621                                         $benefitList
 622                                 )
 623                         );
 624                 }
 625
 626                 $html = Html::rawElement( 'div', [ 'class' => 'mw-ui-container' ],
 627                         $loginPrompt
 628                         . $languageLinks
 629                         . $signupStart
 630                         . Html::rawElement( 'div', [ 'id' => 'userloginForm' ],
 631                                 $formHtml
 632                         )
 633                         . $benefitsContainer
 634                 );
 635
 636                 return $html;
 637         }
 638
 639         /**
 640          * Generates a form from the given request.
 641          * @param AuthenticationRequest[] $requests
 642          * @param string $action AuthManager action name
 643          * @param string|Message $msg
 644          * @param string $msgType
 645          * @return HTMLForm
 646          */
 647         protected function getAuthForm( array $requests, $action, $msg = '', $msgType = 'error' ) {
 648                 global $wgSecureLogin;
 649                 // FIXME merge this with parent
 650
 651                 if ( isset( $this->authForm ) ) {
 652                         return $this->authForm;
 653                 }
 654
 655                 $usingHTTPS = $this->getRequest()->getProtocol() === 'https';
 656
 657                 // get basic form description from the auth logic
 658                 $fieldInfo = AuthenticationRequest::mergeFieldInfo( $requests );
 659                 // this will call onAuthChangeFormFields()
 660                 $formDescriptor = static::fieldInfoToFormDescriptor( $requests, $fieldInfo, $this->authAction );
 661                 $this->postProcessFormDescriptor( $formDescriptor, $requests );
 662
 663                 $context = $this->getContext();
 664                 if ( $context->getRequest() !== $this->getRequest() ) {
 665                         // We have overridden the request, need to make sure the form uses that too.
 666                         $context = new DerivativeContext( $this->getContext() );
 667                         $context->setRequest( $this->getRequest() );
 668                 }
 669                 $form = HTMLForm::factory( 'vform', $formDescriptor, $context );
 670
 671                 $form->addHiddenField( 'authAction', $this->authAction );
 672                 if ( $this->mLanguage ) {
 673                         $form->addHiddenField( 'uselang', $this->mLanguage );
 674                 }
 675                 $form->addHiddenField( 'force', $this->securityLevel );
 676                 $form->addHiddenField( $this->getTokenName(), $this->getToken()->toString() );
 677                 if ( $wgSecureLogin ) {
 678                         // If using HTTPS coming from HTTP, then the 'fromhttp' parameter must be preserved
 679                         if ( !$this->isSignup() ) {
 680                                 $form->addHiddenField( 'wpForceHttps', (int)$this->mStickHTTPS );
 681                                 $form->addHiddenField( 'wpFromhttp', $usingHTTPS );
 682                         }
 683                 }
 684
 685                 // set properties of the form itself
 686                 $form->setAction( $this->getPageTitle()->getLocalURL( $this->getReturnToQueryStringFragment() ) );
 687                 $form->setName( 'userlogin' . ( $this->isSignup() ? '2' : '' ) );
 688                 if ( $this->isSignup() ) {
 689                         $form->setId( 'userlogin2' );
 690                 }
 691
 692                 $form->suppressDefaultSubmit();
 693
 694                 $this->authForm = $form;
 695
 696                 return $form;
 697         }
 698
 699         public function onAuthChangeFormFields(
 700                 array $requests, array $fieldInfo, array &$formDescriptor, $action
 701         ) {
 702                 $coreFieldDescriptors = $this->getFieldDefinitions();
 703
 704                 // keep the ordering from getCoreFieldDescriptors() where there is no explicit weight
 705                 foreach ( $coreFieldDescriptors as $fieldName => $coreField ) {
 706                         $requestField = $formDescriptor[$fieldName] ?? [];
 707
 708                         // remove everything that is not in the fieldinfo, is not marked as a supplemental field
 709                         // to something in the fieldinfo, and is not an info field or a submit button
 710                         if (
 711                                 !isset( $fieldInfo[$fieldName] )
 712                                 && (
 713                                         !isset( $coreField['baseField'] )
 714                                         || !isset( $fieldInfo[$coreField['baseField']] )
 715                                 )
 716                                 && (
 717                                         !isset( $coreField['type'] )
 718                                         || !in_array( $coreField['type'], [ 'submit', 'info' ], true )
 719                                 )
 720                         ) {
 721                                 $coreFieldDescriptors[$fieldName] = null;
 722                                 continue;
 723                         }
 724
 725                         // core message labels should always take priority
 726                         if (
 727                                 isset( $coreField['label'] )
 728                                 || isset( $coreField['label-message'] )
 729                                 || isset( $coreField['label-raw'] )
 730                         ) {
 731                                 unset( $requestField['label'], $requestField['label-message'], $coreField['label-raw'] );
 732                         }
 733
 734                         $coreFieldDescriptors[$fieldName] += $requestField;
 735                 }
 736
 737                 $formDescriptor = array_filter( $coreFieldDescriptors + $formDescriptor );
 738                 return true;
 739         }
 740
 741         /**
 742          * Show extra information such as password recovery information, link from login to signup,
 743          * CTA etc? Such information should only be shown on the "landing page", ie. when the user
 744          * is at the first step of the authentication process.
 745          * @return bool
 746          */
 747         protected function showExtraInformation() {
 748                 return $this->authAction !== $this->getContinueAction( $this->authAction )
 749                         && !$this->securityLevel;
 750         }
 751
 752         /**
 753          * Create a HTMLForm descriptor for the core login fields.
 754          * @return array
 755          */
 756         protected function getFieldDefinitions() {
 757                 global $wgEmailConfirmToEdit;
 758
 759                 $isLoggedIn = $this->getUser()->isLoggedIn();
 760                 $continuePart = $this->isContinued() ? 'continue-' : '';
 761                 $anotherPart = $isLoggedIn ? 'another-' : '';
 762                 $expiration = $this->getRequest()->getSession()->getProvider()->getRememberUserDuration();
 763                 $expirationDays = ceil( $expiration / ( 3600 * 24 ) );
 764                 $secureLoginLink = '';
 765                 if ( $this->mSecureLoginUrl ) {
 766                         $secureLoginLink = Html::element( 'a', [
 767                                 'href' => $this->mSecureLoginUrl,
 768                                 'class' => 'mw-ui-flush-right mw-secure',
 769                         ], $this->msg( 'userlogin-signwithsecure' )->text() );
 770                 }
 771                 $usernameHelpLink = '';
 772                 if ( !$this->msg( 'createacct-helpusername' )->isDisabled() ) {
 773                         $usernameHelpLink = Html::rawElement( 'span', [
 774                                 'class' => 'mw-ui-flush-right',
 775                         ], $this->msg( 'createacct-helpusername' )->parse() );
 776                 }
 777
 778                 if ( $this->isSignup() ) {
 779                         $fieldDefinitions = [
 780                                 'statusarea' => [
 781                                         // used by the mediawiki.special.userlogin.signup.js module for error display
 782                                         // FIXME merge this with HTMLForm's normal status (error) area
 783                                         'type' => 'info',
 784                                         'raw' => true,
 785                                         'default' => Html::element( 'div', [ 'id' => 'mw-createacct-status-area' ] ),
 786                                         'weight' => -105,
 787                                 ],
 788                                 'username' => [
 789                                         'label-raw' => $this->msg( 'userlogin-yourname' )->escaped() . $usernameHelpLink,
 790                                         'id' => 'wpName2',
 791                                         'placeholder-message' => $isLoggedIn ? 'createacct-another-username-ph'
 792                                                 : 'userlogin-yourname-ph',
 793                                 ],
 794                                 'mailpassword' => [
 795                                         // create account without providing password, a temporary one will be mailed
 796                                         'type' => 'check',
 797                                         'label-message' => 'createaccountmail',
 798                                         'name' => 'wpCreateaccountMail',
 799                                         'id' => 'wpCreateaccountMail',
 800                                 ],
 801                                 'password' => [
 802                                         'id' => 'wpPassword2',
 803                                         'placeholder-message' => 'createacct-yourpassword-ph',
 804                                         'hide-if' => [ '===', 'wpCreateaccountMail', '1' ],
 805                                 ],
 806                                 'domain' => [],
 807                                 'retype' => [
 808                                         'baseField' => 'password',
 809                                         'type' => 'password',
 810                                         'label-message' => 'createacct-yourpasswordagain',
 811                                         'id' => 'wpRetype',
 812                                         'cssclass' => 'loginPassword',
 813                                         'size' => 20,
 814                                         'validation-callback' => function ( $value, $alldata ) {
 815                                                 if ( empty( $alldata['mailpassword'] ) && !empty( $alldata['password'] ) ) {
 816                                                         if ( !$value ) {
 817                                                                 return $this->msg( 'htmlform-required' );
 818                                                         } elseif ( $value !== $alldata['password'] ) {
 819                                                                 return $this->msg( 'badretype' );
 820                                                         }
 821                                                 }
 822                                                 return true;
 823                                         },
 824                                         'hide-if' => [ '===', 'wpCreateaccountMail', '1' ],
 825                                         'placeholder-message' => 'createacct-yourpasswordagain-ph',
 826                                 ],
 827                                 'email' => [
 828                                         'type' => 'email',
 829                                         'label-message' => $wgEmailConfirmToEdit ? 'createacct-emailrequired'
 830                                                 : 'createacct-emailoptional',
 831                                         'id' => 'wpEmail',
 832                                         'cssclass' => 'loginText',
 833                                         'size' => '20',
 834                                         // FIXME will break non-standard providers
 835                                         'required' => $wgEmailConfirmToEdit,
 836                                         'validation-callback' => function ( $value, $alldata ) {
 837                                                 global $wgEmailConfirmToEdit;
 838
 839                                                 // AuthManager will check most of these, but that will make the auth
 840                                                 // session fail and this won't, so nicer to do it this way
 841                                                 if ( !$value && $wgEmailConfirmToEdit ) {
 842                                                         // no point in allowing registration without email when email is
 843                                                         // required to edit
 844                                                         return $this->msg( 'noemailtitle' );
 845                                                 } elseif ( !$value && !empty( $alldata['mailpassword'] ) ) {
 846                                                         // cannot send password via email when there is no email address
 847                                                         return $this->msg( 'noemailcreate' );
 848                                                 } elseif ( $value && !Sanitizer::validateEmail( $value ) ) {
 849                                                         return $this->msg( 'invalidemailaddress' );
 850                                                 }
 851                                                 return true;
 852                                         },
 853                                         'placeholder-message' => 'createacct-' . $anotherPart . 'email-ph',
 854                                 ],
 855                                 'realname' => [
 856                                         'type' => 'text',
 857                                         'help-message' => $isLoggedIn ? 'createacct-another-realname-tip'
 858                                                 : 'prefs-help-realname',
 859                                         'label-message' => 'createacct-realname',
 860                                         'cssclass' => 'loginText',
 861                                         'size' => 20,
 862                                         'id' => 'wpRealName',
 863                                 ],
 864                                 'reason' => [
 865                                         // comment for the user creation log
 866                                         'type' => 'text',
 867                                         'label-message' => 'createacct-reason',
 868                                         'cssclass' => 'loginText',
 869                                         'id' => 'wpReason',
 870                                         'size' => '20',
 871                                         'placeholder-message' => 'createacct-reason-ph',
 872                                 ],
 873                                 'createaccount' => [
 874                                         // submit button
 875                                         'type' => 'submit',
 876                                         'default' => $this->msg( 'createacct-' . $anotherPart . $continuePart .
 877                                                 'submit' )->text(),
 878                                         'name' => 'wpCreateaccount',
 879                                         'id' => 'wpCreateaccount',
 880                                         'weight' => 100,
 881                                 ],
 882                         ];
 883                 } else {
 884                         $fieldDefinitions = [
 885                                 'username' => [
 886                                         'label-raw' => $this->msg( 'userlogin-yourname' )->escaped() . $secureLoginLink,
 887                                         'id' => 'wpName1',
 888                                         'placeholder-message' => 'userlogin-yourname-ph',
 889                                 ],
 890                                 'password' => [
 891                                         'id' => 'wpPassword1',
 892                                         'placeholder-message' => 'userlogin-yourpassword-ph',
 893                                 ],
 894                                 'domain' => [],
 895                                 'rememberMe' => [
 896                                         // option for saving the user token to a cookie
 897                                         'type' => 'check',
 898                                         'name' => 'wpRemember',
 899                                         'label-message' => $this->msg( 'userlogin-remembermypassword' )
 900                                                 ->numParams( $expirationDays ),
 901                                         'id' => 'wpRemember',
 902                                 ],
 903                                 'loginattempt' => [
 904                                         // submit button
 905                                         'type' => 'submit',
 906                                         'default' => $this->msg( 'pt-login-' . $continuePart . 'button' )->text(),
 907                                         'id' => 'wpLoginAttempt',
 908                                         'weight' => 100,
 909                                 ],
 910                                 'linkcontainer' => [
 911                                         // help link
 912                                         'type' => 'info',
 913                                         'cssclass' => 'mw-form-related-link-container mw-userlogin-help',
 914                                         // 'id' => 'mw-userlogin-help', // FIXME HTMLInfoField ignores this
 915                                         'raw' => true,
 916                                         'default' => Html::element( 'a', [
 917                                                 'href' => Skin::makeInternalOrExternalUrl( $this->msg( 'helplogin-url' )
 918                                                         ->inContentLanguage()
 919                                                         ->text() ),
 920                                         ], $this->msg( 'userlogin-helplink2' )->text() ),
 921                                         'weight' => 200,
 922                                 ],
 923                                 // button for ResetPasswordSecondaryAuthenticationProvider
 924                                 'skipReset' => [
 925                                         'weight' => 110,
 926                                         'flags' => [],
 927                                 ],
 928                         ];
 929                 }
 930
 931                 $fieldDefinitions['username'] += [
 932                         'type' => 'text',
 933                         'name' => 'wpName',
 934                         'cssclass' => 'loginText',
 935                         'size' => 20,
 936                         // 'required' => true,
 937                 ];
 938                 $fieldDefinitions['password'] += [
 939                         'type' => 'password',
 940                         // 'label-message' => 'userlogin-yourpassword', // would override the changepassword label
 941                         'name' => 'wpPassword',
 942                         'cssclass' => 'loginPassword',
 943                         'size' => 20,
 944                         // 'required' => true,
 945                 ];
 946
 947                 if ( $this->mEntryError ) {
 948                         $fieldDefinitions['entryError'] = [
 949                                 'type' => 'info',
 950                                 'default' => Html::rawElement( 'div', [ 'class' => $this->mEntryErrorType . 'box', ],
 951                                         $this->mEntryError ),
 952                                 'raw' => true,
 953                                 'rawrow' => true,
 954                                 'weight' => -100,
 955                         ];
 956                 }
 957                 if ( !$this->showExtraInformation() ) {
 958                         unset( $fieldDefinitions['linkcontainer'], $fieldDefinitions['signupend'] );
 959                 }
 960                 if ( $this->isSignup() && $this->showExtraInformation() ) {
 961                         // blank signup footer for site customization
 962                         // uses signupend-https for HTTPS requests if it's not blank, signupend otherwise
 963                         $signupendMsg = $this->msg( 'signupend' );
 964                         $signupendHttpsMsg = $this->msg( 'signupend-https' );
 965                         if ( !$signupendMsg->isDisabled() ) {
 966                                 $usingHTTPS = $this->getRequest()->getProtocol() === 'https';
 967                                 $signupendText = ( $usingHTTPS && !$signupendHttpsMsg->isBlank() )
 968                                         ? $signupendHttpsMsg->parse() : $signupendMsg->parse();
 969                                 $fieldDefinitions['signupend'] = [
 970                                         'type' => 'info',
 971                                         'raw' => true,
 972                                         'default' => Html::rawElement( 'div', [ 'id' => 'signupend' ], $signupendText ),
 973                                         'weight' => 225,
 974                                 ];
 975                         }
 976                 }
 977                 if ( !$this->isSignup() && $this->showExtraInformation() ) {
 978                         $passwordReset = new PasswordReset( $this->getConfig(), AuthManager::singleton() );
 979                         if ( $passwordReset->isAllowed( $this->getUser() )->isGood() ) {
 980                                 $fieldDefinitions['passwordReset'] = [
 981                                         'type' => 'info',
 982                                         'raw' => true,
 983                                         'cssclass' => 'mw-form-related-link-container',
 984                                         'default' => $this->getLinkRenderer()->makeLink(
 985                                                 SpecialPage::getTitleFor( 'PasswordReset' ),
 986                                                 $this->msg( 'userlogin-resetpassword-link' )->text()
 987                                         ),
 988                                         'weight' => 230,
 989                                 ];
 990                         }
 991
 992                         // Don't show a "create account" link if the user can't.
 993                         if ( $this->showCreateAccountLink() ) {
 994                                 // link to the other action
 995                                 $linkTitle = $this->getTitleFor( $this->isSignup() ? 'Userlogin' : 'CreateAccount' );
 996                                 $linkq = $this->getReturnToQueryStringFragment();
 997                                 // Pass any language selection on to the mode switch link
 998                                 if ( $this->mLanguage ) {
 999                                         $linkq .= '&uselang=' . urlencode( $this->mLanguage );
1000                                 }
1001                                 $loggedIn = $this->getUser()->isLoggedIn();
1002
1003                                 $fieldDefinitions['createOrLogin'] = [
1004                                         'type' => 'info',
1005                                         'raw' => true,
1006                                         'linkQuery' => $linkq,
1007                                         'default' => function ( $params ) use ( $loggedIn, $linkTitle ) {
1008                                                 return Html::rawElement( 'div',
1009                                                         [ 'id' => 'mw-createaccount' . ( !$loggedIn ? '-cta' : '' ),
1010                                                                 'class' => ( $loggedIn ? 'mw-form-related-link-container' : 'mw-ui-vform-field' ) ],
1011                                                         ( $loggedIn ? '' : $this->msg( 'userlogin-noaccount' )->escaped() )
1012                                                         . Html::element( 'a',
1013                                                                 [
1014                                                                         'id' => 'mw-createaccount-join' . ( $loggedIn ? '-loggedin' : '' ),
1015                                                                         'href' => $linkTitle->getLocalURL( $params['linkQuery'] ),
1016                                                                         'class' => ( $loggedIn ? '' : 'mw-ui-button' ),
1017                                                                         'tabindex' => 100,
1018                                                                 ],
1019                                                                 $this->msg(
1020                                                                         $loggedIn ? 'userlogin-createanother' : 'userlogin-joinproject'
1021                                                                 )->text()
1022                                                         )
1023                                                 );
1024                                         },
1025                                         'weight' => 235,
1026                                 ];
1027                         }
1028                 }
1029
1030                 return $fieldDefinitions;
1031         }
1032
1033         /**
1034          * Check if a session cookie is present.
1035          *
1036          * This will not pick up a cookie set during _this_ request, but is meant
1037          * to ensure that the client is returning the cookie which was set on a
1038          * previous pass through the system.
1039          *
1040          * @return bool
1041          */
1042         protected function hasSessionCookie() {
1043                 global $wgDisableCookieCheck, $wgInitialSessionId;
1044
1045                 return $wgDisableCookieCheck || (
1046                         $wgInitialSessionId &&
1047                         $this->getRequest()->getSession()->getId() === (string)$wgInitialSessionId
1048                 );
1049         }
1050
1051         /**
1052          * Returns a string that can be appended to the URL (without encoding) to preserve the
1053          * return target. Does not include leading '?'/'&'.
1054          * @return string
1055          */
1056         protected function getReturnToQueryStringFragment() {
1057                 $returnto = '';
1058                 if ( $this->mReturnTo !== '' ) {
1059                         $returnto = 'returnto=' . wfUrlencode( $this->mReturnTo );
1060                         if ( $this->mReturnToQuery !== '' ) {
1061                                 $returnto .= '&returntoquery=' . wfUrlencode( $this->mReturnToQuery );
1062                         }
1063                 }
1064                 return $returnto;
1065         }
1066
1067         /**
1068          * Whether the login/create account form should display a link to the
1069          * other form (in addition to whatever the skin provides).
1070          * @return bool
1071          */
1072         private function showCreateAccountLink() {
1073                 if ( $this->isSignup() ) {
1074                         return true;
1075                 } elseif ( $this->getUser()->isAllowed( 'createaccount' ) ) {
1076                         return true;
1077                 } else {
1078                         return false;
1079                 }
1080         }
1081
1082         protected function getTokenName() {
1083                 return $this->isSignup() ? 'wpCreateaccountToken' : 'wpLoginToken';
1084         }
1085
1086         /**
1087          * Produce a bar of links which allow the user to select another language
1088          * during login/registration but retain "returnto"
1089          *
1090          * @return string
1091          */
1092         protected function makeLanguageSelector() {
1093                 $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1094                 if ( $msg->isBlank() ) {
1095                         return '';
1096                 }
1097                 $langs = explode( "\n", $msg->text() );
1098                 $links = [];
1099                 foreach ( $langs as $lang ) {
1100                         $lang = trim( $lang, '* ' );
1101                         $parts = explode( '|', $lang );
1102                         if ( count( $parts ) >= 2 ) {
1103                                 $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1104                         }
1105                 }
1106
1107                 return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1108                         $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1109         }
1110
1111         /**
1112          * Create a language selector link for a particular language
1113          * Links back to this page preserving type and returnto
1114          *
1115          * @param string $text Link text
1116          * @param string $lang Language code
1117          * @return string
1118          */
1119         protected function makeLanguageSelectorLink( $text, $lang ) {
1120                 if ( $this->getLanguage()->getCode() == $lang ) {
1121                         // no link for currently used language
1122                         return htmlspecialchars( $text );
1123                 }
1124                 $query = [ 'uselang' => $lang ];
1125                 if ( $this->mReturnTo !== '' ) {
1126                         $query['returnto'] = $this->mReturnTo;
1127                         $query['returntoquery'] = $this->mReturnToQuery;
1128                 }
1129
1130                 $attr = [];
1131                 $targetLanguage = Language::factory( $lang );
1132                 $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1133
1134                 return $this->getLinkRenderer()->makeKnownLink(
1135                         $this->getPageTitle(),
1136                         $text,
1137                         $attr,
1138                         $query
1139                 );
1140         }
1141
1142         protected function getGroupName() {
1143                 return 'login';
1144         }
1145
1146         /**
1147          * @param array &$formDescriptor
1148          * @param array $requests
1149          */
1150         protected function postProcessFormDescriptor( &$formDescriptor, $requests ) {
1151                 // Pre-fill username (if not creating an account, T46775).
1152                 if (
1153                         isset( $formDescriptor['username'] ) &&
1154                         !isset( $formDescriptor['username']['default'] ) &&
1155                         !$this->isSignup()
1156                 ) {
1157                         $user = $this->getUser();
1158                         if ( $user->isLoggedIn() ) {
1159                                 $formDescriptor['username']['default'] = $user->getName();
1160                         } else {
1161                                 $formDescriptor['username']['default'] =
1162                                         $this->getRequest()->getSession()->suggestLoginUsername();
1163                         }
1164                 }
1165
1166                 // don't show a submit button if there is nothing to submit (i.e. the only form content
1167                 // is other submit buttons, for redirect flows)
1168                 if ( !$this->needsSubmitButton( $requests ) ) {
1169                         unset( $formDescriptor['createaccount'], $formDescriptor['loginattempt'] );
1170                 }
1171
1172                 if ( !$this->isSignup() ) {
1173                         // FIXME HACK don't focus on non-empty field
1174                         // maybe there should be an autofocus-if similar to hide-if?
1175                         if (
1176                                 isset( $formDescriptor['username'] )
1177                                 && empty( $formDescriptor['username']['default'] )
1178                                 && !$this->getRequest()->getCheck( 'wpName' )
1179                         ) {
1180                                 $formDescriptor['username']['autofocus'] = true;
1181                         } elseif ( isset( $formDescriptor['password'] ) ) {
1182                                 $formDescriptor['password']['autofocus'] = true;
1183                         }
1184                 }
1185
1186                 $this->addTabIndex( $formDescriptor );
1187         }
1188 }