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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
24namespace MediaWiki\SpecialPage;
25
26use ErrorPageError;
27use Exception;
28use FatalError;
29use LogicException;
30use LoginHelper;
31use MediaWiki\Auth\AuthenticationRequest;
32use MediaWiki\Auth\AuthenticationResponse;
33use MediaWiki\Auth\AuthManager;
34use MediaWiki\Auth\PasswordAuthenticationRequest;
35use MediaWiki\Auth\UsernameAuthenticationRequest;
36use MediaWiki\Context\DerivativeContext;
37use MediaWiki\Context\RequestContext;
38use MediaWiki\Html\Html;
39use MediaWiki\HTMLForm\HTMLForm;
40use MediaWiki\Language\RawMessage;
41use MediaWiki\Logger\LoggerFactory;
42use MediaWiki\MainConfigNames;
43use MediaWiki\MediaWikiServices;
44use MediaWiki\Message\Message;
45use MediaWiki\Parser\Sanitizer;
46use MediaWiki\Session\SessionManager;
47use MediaWiki\Status\Status;
48use MediaWiki\Title\Title;
49use MediaWiki\User\User;
50use MediaWiki\User\UserIdentity;
51use PermissionsError;
52use ReadOnlyError;
53use Skin;
54use StatusValue;
55use Wikimedia\ScopedCallback;
56
57/**
58 * Holds shared logic for login and account creation pages.
59 *
60 * @ingroup SpecialPage
61 * @ingroup Auth
62 */
63abstract class LoginSignupSpecialPage extends AuthManagerSpecialPage {
64
65    /**
66     * The title of the page to return to after authentication finishes, or the empty string
67     * when there is no return target.
68     * Typically comes from the 'returnto' URL parameter. Validating and normalizing is the
69     * caller's responsibility.
70     * @var string
71     */
72    protected string $mReturnTo;
73    /**
74     * The query string part of the URL to return to after authentication finishes.
75     * Typically comes from the 'returntoquery' URL parameter.
76     * @var string
77     */
78    protected string $mReturnToQuery;
79    /**
80     * The fragment part of the URL to return to after authentication finishes.
81     * When not empty, should include the '#' character.
82     * Typically comes from the 'returntoanchor' URL parameter.
83     * @var string
84     */
85    protected string $mReturnToAnchor;
86
87    /** @var bool */
88    protected $mPosted;
89    /** @var string|null */
90    protected $mAction;
91    /** @var string */
92    protected $mToken;
93    /** @var bool */
94    protected $mStickHTTPS;
95    /** @var bool */
96    protected $mFromHTTP;
97    /** @var string */
98    protected $mEntryError = '';
99    /** @var string */
100    protected $mEntryErrorType = 'error';
101    /** @var string */
102    protected $mDisplay = 'page';
103
104    /** @var bool */
105    protected $mLoaded = false;
106    /** @var bool */
107    protected $mLoadedRequest = false;
108    /** @var string|null */
109    protected $mSecureLoginUrl;
110    /** @var string|true|null */
111    private $reasonValidatorResult = null;
112
113    /** @var string */
114    protected $securityLevel;
115
116    /** @var bool True if the user if creating an account for someone else. Flag used for internal
117     * communication, only set at the very end.
118     */
119    protected $proxyAccountCreation;
120    /** @var User FIXME another flag for passing data. */
121    protected $targetUser;
122
123    /** @var HTMLForm|null */
124    protected $authForm;
125
126    abstract protected function isSignup();
127
128    /**
129     * @param bool $direct True if the action was successful just now; false if that happened
130     *    pre-redirection (so this handler was called already)
131     * @param StatusValue|null $extraMessages
132     * @return void
133     */
134    abstract protected function successfulAction( $direct = false, $extraMessages = null );
135
136    /**
137     * Logs to the authmanager-stats channel.
138     * @param bool $success
139     * @param UserIdentity $performer The performer
140     * @param string|null $status Error message key
141     */
142    abstract protected function logAuthResult( $success, UserIdentity $performer, $status = null );
143
144    protected function setRequest( array $data, $wasPosted = null ) {
145        parent::setRequest( $data, $wasPosted );
146        $this->mLoadedRequest = false;
147    }
148
149    /**
150     * Load basic request parameters for this Special page.
151     */
152    private function loadRequestParameters() {
153        if ( $this->mLoadedRequest ) {
154            return;
155        }
156        $this->mLoadedRequest = true;
157        $request = $this->getRequest();
158
159        $this->mPosted = $request->wasPosted();
160        $this->mAction = $request->getRawVal( 'action' );
161        $this->mFromHTTP = $request->getBool( 'fromhttp', false )
162            || $request->getBool( 'wpFromhttp', false );
163        $this->mStickHTTPS = $this->getConfig()->get( MainConfigNames::ForceHTTPS )
164            || ( !$this->mFromHTTP && $request->getProtocol() === 'https' )
165            || $request->getBool( 'wpForceHttps', false );
166        $this->mReturnTo = $request->getVal( 'returnto', '' );
167        $this->mReturnToQuery = $request->getVal( 'returntoquery', '' );
168        $this->mReturnToAnchor = $request->getVal( 'returntoanchor', '' );
169        if ( $request->getVal( 'display' ) === 'popup' ) {
170            $this->mDisplay = 'popup';
171        }
172    }
173
174    /**
175     * Load data from request.
176     * @internal
177     * @param string $subPage Subpage of Special:Userlogin
178     */
179    protected function load( $subPage ) {
180        $this->loadRequestParameters();
181        if ( $this->mLoaded ) {
182            return;
183        }
184        $this->mLoaded = true;
185        $request = $this->getRequest();
186
187        $securityLevel = $this->getRequest()->getText( 'force' );
188        if (
189            $securityLevel &&
190                MediaWikiServices::getInstance()->getAuthManager()->securitySensitiveOperationStatus(
191                    $securityLevel ) === AuthManager::SEC_REAUTH
192        ) {
193            $this->securityLevel = $securityLevel;
194        }
195
196        $this->loadAuth( $subPage );
197
198        $this->mToken = $request->getVal( $this->getTokenName() );
199
200        // Show an error or warning or a notice passed on from a previous page
201        $entryError = $this->msg( $request->getVal( 'error', '' ) );
202        $entryWarning = $this->msg( $request->getVal( 'warning', '' ) );
203        $entryNotice = $this->msg( $request->getVal( 'notice', '' ) );
204        // bc: provide login link as a parameter for messages where the translation
205        // was not updated
206        $loginreqlink = $this->getLinkRenderer()->makeKnownLink(
207            $this->getPageTitle(),
208            $this->msg( 'loginreqlink' )->text(),
209            [],
210            $this->getPreservedParams( [ 'reset' => true ] )
211        );
212
213        // Only show valid error or warning messages.
214        $validErrorMessages = LoginHelper::getValidErrorMessages();
215        if ( $entryError->exists()
216            && in_array( $entryError->getKey(), $validErrorMessages, true )
217        ) {
218            $this->mEntryErrorType = 'error';
219            $this->mEntryError = $entryError->rawParams( $loginreqlink )->parse();
220
221        } elseif ( $entryWarning->exists()
222            && in_array( $entryWarning->getKey(), $validErrorMessages, true )
223        ) {
224            $this->mEntryErrorType = 'warning';
225            $this->mEntryError = $entryWarning->rawParams( $loginreqlink )->parse();
226        } elseif ( $entryNotice->exists()
227            && in_array( $entryNotice->getKey(), $validErrorMessages, true )
228        ) {
229            $this->mEntryErrorType = 'notice';
230            $this->mEntryError = $entryNotice->parse();
231        }
232
233        # 1. When switching accounts, it sucks to get automatically logged out
234        # 2. Do not return to PasswordReset after a successful password change
235        #    but goto Wiki start page (Main_Page) instead ( T35997 )
236        $returnToTitle = Title::newFromText( $this->mReturnTo );
237        if ( is_object( $returnToTitle )
238            && ( $returnToTitle->isSpecial( 'Userlogout' )
239                || $returnToTitle->isSpecial( 'PasswordReset' ) )
240        ) {
241            $this->mReturnTo = '';
242            $this->mReturnToQuery = '';
243        }
244    }
245
246    /** @inheritDoc */
247    protected function getPreservedParams( $options = [] ) {
248        $params = parent::getPreservedParams( $options );
249
250        // Override returnto* with their property-based values, to account for the
251        // special-casing in load().
252        $this->loadRequestParameters();
253        $properties = [
254            'returnto' => 'mReturnTo',
255            'returntoquery' => 'mReturnToQuery',
256            'returntoanchor' => 'mReturnToAnchor',
257        ];
258        foreach ( $properties as $key => $prop ) {
259            $value = $this->$prop;
260            if ( $value !== '' ) {
261                $params[$key] = $value;
262            } else {
263                unset( $params[$key] );
264            }
265        }
266
267        if ( $this->getConfig()->get( MainConfigNames::SecureLogin ) && !$this->isSignup() ) {
268            $params['fromhttp'] = $this->mFromHTTP ? '1' : null;
269        }
270        if ( $this->mDisplay !== 'page' ) {
271            $params['display'] = $this->mDisplay;
272        }
273
274        return array_filter( $params, fn ( $val ) => $val !== null );
275    }
276
277    protected function beforeExecute( $subPage ) {
278        // finish initializing the class before processing the request - T135924
279        $this->loadRequestParameters();
280        return parent::beforeExecute( $subPage );
281    }
282
283    /**
284     * @param string|null $subPage
285     * @suppress PhanTypeObjectUnsetDeclaredProperty
286     */
287    public function execute( $subPage ) {
288        if ( $this->mPosted ) {
289            $time = microtime( true );
290            $profilingScope = new ScopedCallback( function () use ( $time ) {
291                $time = microtime( true ) - $time;
292                $stats = MediaWikiServices::getInstance()->getStatsFactory();
293                $stats->getTiming( 'auth_specialpage_executeTiming_seconds' )
294                    ->setLabel( 'action', $this->authAction )
295                    ->copyToStatsdAt( "timing.login.ui.{$this->authAction}" )
296                    ->observe( $time * 1000 );
297            } );
298        }
299
300        $authManager = MediaWikiServices::getInstance()->getAuthManager();
301        $session = SessionManager::getGlobalSession();
302
303        // Session data is used for various things in the authentication process, so we must make
304        // sure a session cookie or some equivalent mechanism is set.
305        $session->persist();
306        // Explicitly disable cache to ensure cookie blocks may be set (T152462).
307        // (Technically redundant with sessions persisting from this page.)
308        $this->getOutput()->disableClientCache();
309
310        $this->load( $subPage );
311
312        // Do this early, so that it affects how error pages are rendered too
313        if ( $this->mDisplay === 'popup' ) {
314            // Replace the default skin with a "micro-skin" that omits most of the interface. (T362706)
315            // In the future, we might allow normal skins to serve this mode too, if they advise that
316            // they support it by setting a skin option, so that colors and fonts could stay consistent.
317            $skinFactory = MediaWikiServices::getInstance()->getSkinFactory();
318            $this->getContext()->setSkin( $skinFactory->makeSkin( 'authentication-popup' ) );
319        }
320
321        $this->setHeaders();
322        $this->checkPermissions();
323
324        // Make sure the system configuration allows log in / sign up
325        if ( !$this->isSignup() && !$authManager->canAuthenticateNow() ) {
326            if ( !$session->canSetUser() ) {
327                throw new ErrorPageError( 'cannotloginnow-title', 'cannotloginnow-text', [
328                    $session->getProvider()->describe( $this->getLanguage() )
329                ] );
330            }
331            throw new ErrorPageError( 'cannotlogin-title', 'cannotlogin-text' );
332        } elseif ( $this->isSignup() && !$authManager->canCreateAccounts() ) {
333            throw new ErrorPageError( 'cannotcreateaccount-title', 'cannotcreateaccount-text' );
334        }
335
336        /*
337         * In the case where the user is already logged in, and was redirected to
338         * the login form from a page that requires login, do not show the login
339         * page. The use case scenario for this is when a user opens a large number
340         * of tabs, is redirected to the login page on all of them, and then logs
341         * in on one, expecting all the others to work properly.
342         *
343         * However, do show the form if it was visited intentionally (no 'returnto'
344         * is present). People who often switch between several accounts have grown
345         * accustomed to this behavior.
346         *
347         * For temporary users, the form is always shown, since the UI presents
348         * temporary users as not logged in and offers to discard their temporary
349         * account by logging in.
350         *
351         * Also make an exception when force=<level> is set in the URL, which means the user must
352         * reauthenticate for security reasons.
353         */
354        if ( !$this->isSignup() && !$this->mPosted && !$this->securityLevel &&
355            ( $this->mReturnTo !== '' || $this->mReturnToQuery !== '' ) &&
356            !$this->getUser()->isTemp() && $this->getUser()->isRegistered()
357        ) {
358            $this->successfulAction();
359            return;
360        }
361
362        // If logging in and not on HTTPS, either redirect to it or offer a link.
363        if ( $this->getRequest()->getProtocol() !== 'https' ) {
364            $title = $this->getFullTitle();
365            $query = $this->getPreservedParams() + [
366                    'title' => null,
367                    ( $this->mEntryErrorType === 'error' ? 'error'
368                        : 'warning' ) => $this->mEntryError,
369                ] + $this->getRequest()->getQueryValues();
370            $url = $title->getFullURL( $query, false, PROTO_HTTPS );
371            if ( $this->getConfig()->get( MainConfigNames::SecureLogin ) && !$this->mFromHTTP ) {
372                // Avoid infinite redirect
373                $url = wfAppendQuery( $url, 'fromhttp=1' );
374                $this->getOutput()->redirect( $url );
375                // Since we only do this redir to change proto, always vary
376                $this->getOutput()->addVaryHeader( 'X-Forwarded-Proto' );
377
378                return;
379            } else {
380                // A wiki without HTTPS login support should set $wgServer to
381                // http://somehost, in which case the secure URL generated
382                // above won't actually start with https://
383                if ( str_starts_with( $url, 'https://' ) ) {
384                    $this->mSecureLoginUrl = $url;
385                }
386            }
387        }
388
389        if ( !$this->isActionAllowed( $this->authAction ) ) {
390            // FIXME how do we explain this to the user? can we handle session loss better?
391            // messages used: authpage-cannot-login, authpage-cannot-login-continue,
392            // authpage-cannot-create, authpage-cannot-create-continue
393            $this->mainLoginForm( [], 'authpage-cannot-' . $this->authAction );
394            return;
395        }
396
397        if ( $this->canBypassForm( $button_name ) ) {
398            $this->setRequest( [], true );
399            $this->getRequest()->setVal( $this->getTokenName(), $this->getToken() );
400            if ( $button_name ) {
401                $this->getRequest()->setVal( $button_name, true );
402            }
403        }
404        $performer = $this->getUser();
405        $status = $this->trySubmit();
406
407        if ( !$status || !$status->isGood() ) {
408            $this->mainLoginForm( $this->authRequests, $status ? $status->getMessage() : '', 'error' );
409            return;
410        }
411
412        /** @var AuthenticationResponse $response */
413        $response = $status->getValue();
414
415        $returnToUrl = $this->getPageTitle( 'return' )
416            ->getFullURL( $this->getPreservedParams( [ 'withToken' => true ] ), false, PROTO_HTTPS );
417        switch ( $response->status ) {
418            case AuthenticationResponse::PASS:
419                $this->logAuthResult( true, $performer );
420                $this->proxyAccountCreation = $this->isSignup() && $this->getUser()->isNamed();
421                $this->targetUser = User::newFromName( $response->username );
422
423                if (
424                    !$this->proxyAccountCreation
425                    && $response->loginRequest
426                    && $authManager->canAuthenticateNow()
427                ) {
428                    // successful registration; log the user in instantly
429                    $response2 = $authManager->beginAuthentication( [ $response->loginRequest ],
430                        $returnToUrl );
431                    if ( $response2->status !== AuthenticationResponse::PASS ) {
432                        LoggerFactory::getInstance( 'login' )
433                            ->error( 'Could not log in after account creation' );
434                        $this->successfulAction( true, Status::newFatal( 'createacct-loginerror' ) );
435                        break;
436                    }
437                }
438
439                if ( !$this->proxyAccountCreation ) {
440                    $context = RequestContext::getMain();
441                    $localContext = $this->getContext();
442                    if ( $context !== $localContext ) {
443                        // remove AuthManagerSpecialPage context hack
444                        $this->setContext( $context );
445                    }
446                    // Ensure that the context user is the same as the session user.
447                    $this->getAuthManager()->setRequestContextUserFromSessionUser();
448                }
449
450                $this->successfulAction( true );
451                break;
452            case AuthenticationResponse::FAIL:
453                // fall through
454            case AuthenticationResponse::RESTART:
455                unset( $this->authForm );
456                if ( $response->status === AuthenticationResponse::FAIL ) {
457                    $action = $this->getDefaultAction( $subPage );
458                    $messageType = 'error';
459                } else {
460                    $action = $this->getContinueAction( $this->authAction );
461                    $messageType = 'warning';
462                }
463                $this->logAuthResult( false, $performer, $response->message ? $response->message->getKey() : '-' );
464                $this->loadAuth( $subPage, $action, true );
465                $this->mainLoginForm( $this->authRequests, $response->message, $messageType );
466                break;
467            case AuthenticationResponse::REDIRECT:
468                unset( $this->authForm );
469                $this->getOutput()->redirect( $response->redirectTarget );
470                break;
471            case AuthenticationResponse::UI:
472                unset( $this->authForm );
473                $this->authAction = $this->isSignup() ? AuthManager::ACTION_CREATE_CONTINUE
474                    : AuthManager::ACTION_LOGIN_CONTINUE;
475                $this->authRequests = $response->neededRequests;
476                $this->mainLoginForm( $response->neededRequests, $response->message, $response->messageType );
477                break;
478            default:
479                throw new LogicException( 'invalid AuthenticationResponse' );
480        }
481    }
482
483    /**
484     * Determine if the login form can be bypassed. This will be the case when no more than one
485     * button is present and no other user input fields that are not marked as 'skippable' are
486     * present. If the login form were not bypassed, the user would be presented with a
487     * superfluous page on which they must press the single button to proceed with login.
488     * Not only does this cause an additional mouse click and page load, it confuses users,
489     * especially since there are a help link and forgotten password link that are
490     * provided on the login page that do not apply to this situation.
491     *
492     * @param string|null &$button_name if the form has a single button, returns
493     *   the name of the button; otherwise, returns null
494     * @return bool
495     */
496    private function canBypassForm( &$button_name ) {
497        $button_name = null;
498        if ( $this->isContinued() ) {
499            return false;
500        }
501        $fields = AuthenticationRequest::mergeFieldInfo( $this->authRequests );
502        foreach ( $fields as $fieldname => $field ) {
503            if ( !isset( $field['type'] ) ) {
504                return false;
505            }
506            if ( !empty( $field['skippable'] ) ) {
507                continue;
508            }
509            if ( $field['type'] === 'button' ) {
510                if ( $button_name !== null ) {
511                    $button_name = null;
512                    return false;
513                } else {
514                    $button_name = $fieldname;
515                }
516            } elseif ( $field['type'] !== 'null' ) {
517                return false;
518            }
519        }
520        return true;
521    }
522
523    /**
524     * Show the success page.
525     *
526     * @param string $type Condition of return to; see `executeReturnTo`
527     * @param string|Message $title Page's title
528     * @param string $msgname
529     * @param string $injected_html
530     * @param StatusValue|null $extraMessages
531     */
532    protected function showSuccessPage(
533        $type, $title, $msgname, $injected_html, $extraMessages
534    ) {
535        $out = $this->getOutput();
536        if ( is_string( $title ) ) {
537            wfDeprecated( __METHOD__ . ' with string title', '1.41' ); // T343849
538            $title = ( new RawMessage( '$1' ) )->rawParams( $title );
539        }
540        $out->setPageTitleMsg( $title );
541        if ( $msgname ) {
542            $out->addWikiMsg( $msgname, wfEscapeWikiText( $this->getUser()->getName() ) );
543        }
544        if ( $extraMessages ) {
545            $extraMessages = Status::wrap( $extraMessages );
546            $out->addWikiTextAsInterface(
547                $extraMessages->getWikiText( false, false, $this->getLanguage() )
548            );
549        }
550
551        $out->addHTML( $injected_html );
552
553        $helper = new LoginHelper( $this->getContext() );
554        $helper->showReturnToPage( $type, $this->mReturnTo, $this->mReturnToQuery,
555            $this->mStickHTTPS, $this->mReturnToAnchor );
556    }
557
558    /**
559     * @param AuthenticationRequest[] $requests A list of AuthorizationRequest objects,
560     *   used to generate the form fields. An empty array means a fatal error
561     *   (authentication cannot continue).
562     * @param string|Message $msg
563     * @param string $msgtype
564     * @throws ErrorPageError
565     * @throws Exception
566     * @throws FatalError
567     * @throws PermissionsError
568     * @throws ReadOnlyError
569     * @internal
570     */
571    protected function mainLoginForm( array $requests, $msg = '', $msgtype = 'error' ) {
572        $user = $this->getUser();
573        $out = $this->getOutput();
574
575        // FIXME how to handle empty $requests - restart, or no form, just an error message?
576        // no form would be better for no session type errors, restart is better when can* fails.
577        if ( !$requests ) {
578            $this->authAction = $this->getDefaultAction( $this->subPage );
579            $this->authForm = null;
580            $requests = MediaWikiServices::getInstance()->getAuthManager()
581                ->getAuthenticationRequests( $this->authAction, $user );
582        }
583
584        // Generic styles and scripts for both login and signup form
585        $out->addModuleStyles( [
586            'mediawiki.special.userlogin.common.styles'
587        ] );
588        if ( $this->isSignup() ) {
589            // Additional styles and scripts for signup form
590            $out->addModules( 'mediawiki.special.createaccount' );
591            $out->addModuleStyles( [
592                'mediawiki.special.userlogin.signup.styles'
593            ] );
594        } else {
595            // Additional styles for login form
596            $out->addModuleStyles( [
597                'mediawiki.special.userlogin.login.styles'
598            ] );
599        }
600        $out->disallowUserJs(); // just in case...
601
602        $form = $this->getAuthForm( $requests, $this->authAction );
603        $form->prepareForm();
604
605        $submitStatus = Status::newGood();
606        if ( $msg && $msgtype === 'warning' ) {
607            $submitStatus->warning( $msg );
608        } elseif ( $msg && $msgtype === 'error' ) {
609            $submitStatus->fatal( $msg );
610        }
611
612        // warning header for non-standard workflows (e.g. security reauthentication)
613        if (
614            !$this->isSignup() &&
615            $this->getUser()->isRegistered() &&
616            !$this->getUser()->isTemp() &&
617            $this->authAction !== AuthManager::ACTION_LOGIN_CONTINUE
618        ) {
619            $reauthMessage = $this->securityLevel ? 'userlogin-reauth' : 'userlogin-loggedin';
620            $submitStatus->warning( $reauthMessage, $this->getUser()->getName() );
621        }
622
623        $formHtml = $form->getHTML( $submitStatus );
624
625        $out->addHTML( $this->getPageHtml( $formHtml ) );
626    }
627
628    /**
629     * Add page elements which are outside the form.
630     * FIXME this should probably be a template, but use a sensible language (handlebars?)
631     * @param string $formHtml
632     * @return string
633     */
634    protected function getPageHtml( $formHtml ) {
635        $loginPrompt = $this->isSignup() ? '' : Html::rawElement( 'div',
636            [ 'id' => 'userloginprompt' ], $this->msg( 'loginprompt' )->parseAsBlock() );
637        $languageLinks = $this->getConfig()->get( MainConfigNames::LoginLanguageSelector )
638            ? $this->makeLanguageSelector() : '';
639        $signupStartMsg = $this->msg( 'signupstart' );
640        $signupStart = ( $this->isSignup() && !$signupStartMsg->isDisabled() )
641            ? Html::rawElement( 'div', [ 'id' => 'signupstart' ], $signupStartMsg->parseAsBlock() ) : '';
642        if ( $languageLinks ) {
643            $languageLinks = Html::rawElement( 'div', [ 'id' => 'languagelinks' ],
644                Html::rawElement( 'p', [], $languageLinks )
645            );
646        }
647        if ( $this->getUser()->isTemp() ) {
648            $noticeHtml = $this->getNoticeHtml();
649        } else {
650            $noticeHtml = '';
651        }
652        $formBlock = Html::rawElement( 'div', [ 'id' => 'userloginForm' ], $formHtml );
653        $formAndBenefits = $formBlock;
654        if ( $this->isSignup() && $this->showExtraInformation() ) {
655            $benefitsContainerHtml = null;
656            $info = [
657                'context' => $this->getContext(),
658                'form' => $this->authForm,
659            ];
660            $options = [
661                'beforeForm' => false,
662            ];
663            $this->getHookRunner()->onSpecialCreateAccountBenefits(
664                $benefitsContainerHtml, $info, $options
665            );
666            $benefitsContainerHtml ??= $this->getBenefitsContainerHtml();
667            $formAndBenefits = $options['beforeForm']
668                ? ( $benefitsContainerHtml . $formBlock )
669                : ( $formBlock . $benefitsContainerHtml );
670        }
671
672        return $loginPrompt
673            . $languageLinks
674            . $signupStart
675            . $noticeHtml
676            . Html::rawElement( 'div', [ 'class' => 'mw-ui-container' ],
677                $formAndBenefits
678            );
679    }
680
681    /**
682     * The HTML to be shown in the "benefits to signing in / creating an account" section of the signup/login page.
683     *
684     * @unstable Experimental method added in 1.38. As noted in the comment from 2015 for getPageHtml,
685     *   this should use a template.
686     * @return string
687     */
688    protected function getBenefitsContainerHtml(): string {
689        $benefitsContainer = '';
690        $this->getOutput()->addModuleStyles( [ 'oojs-ui.styles.icons-user' ] );
691        if ( $this->isSignup() && $this->showExtraInformation() ) {
692            if ( !$this->getUser()->isTemp() ) {
693                // The following messages are used here:
694                // * createacct-benefit-icon1 createacct-benefit-head1 createacct-benefit-body1
695                // * createacct-benefit-icon2 createacct-benefit-head2 createacct-benefit-body2
696                // * createacct-benefit-icon3 createacct-benefit-head3 createacct-benefit-body3
697                $benefitCount = 3;
698                $benefitList = '';
699                for ( $benefitIdx = 1; $benefitIdx <= $benefitCount; $benefitIdx++ ) {
700                    $headUnescaped = $this->msg( "createacct-benefit-head$benefitIdx" )->text();
701                    $iconClass = $this->msg( "createacct-benefit-icon$benefitIdx" )->text();
702                    $benefitList .= Html::rawElement( 'div', [ 'class' => "mw-number-text $iconClass" ],
703                        Html::rawElement( 'span', [],
704                            $this->msg( "createacct-benefit-head$benefitIdx" )->escaped()
705                        )
706                        . Html::rawElement( 'p', [],
707                            $this->msg( "createacct-benefit-body$benefitIdx" )->params( $headUnescaped )->escaped()
708                        )
709                    );
710                }
711                $benefitsContainer = Html::rawElement( 'div', [ 'class' => 'mw-createacct-benefits-container' ],
712                    Html::rawElement( 'div', [ 'class' => 'mw-createacct-benefits-heading' ],
713                        $this->msg( 'createacct-benefit-heading' )->escaped()
714                    )
715                    . Html::rawElement( 'div', [ 'class' => 'mw-createacct-benefits-list' ], $benefitList )
716                );
717            } else {
718                $benefitList = '';
719                $this->getOutput()->addModuleStyles(
720                    [
721                        'oojs-ui.styles.icons-moderation',
722                        'oojs-ui.styles.icons-interactions',
723                    ]
724                );
725                $benefits = [
726                    [
727                        'icon' => 'oo-ui-icon-unStar',
728                        'description' => $this->msg( "benefit-1-description" )->escaped()
729                    ],
730                    [
731                        'icon' => 'oo-ui-icon-userContributions',
732                        'description' => $this->msg( "benefit-2-description" )->escaped()
733                    ],
734                    [
735                        'icon' => 'oo-ui-icon-settings',
736                        'description' => $this->msg( "benefit-3-description" )->escaped()
737                    ]
738                ];
739                foreach ( $benefits as $benefit ) {
740                    $benefitContent = Html::rawElement( 'div', [ 'class' => 'mw-benefit-item' ],
741                        Html::rawElement( 'span', [ 'class' => $benefit[ 'icon' ] ] )
742                        . Html::rawElement( 'p', [], $benefit['description'] )
743                    );
744
745                    $benefitList .= Html::rawElement(
746                        'div', [ 'class' => 'mw-benefit-item-wrapper' ], $benefitContent );
747                }
748
749                $benefitsListWrapper = Html::rawElement(
750                    'div', [ 'class' => 'mw-benefit-list-wrapper' ], $benefitList );
751
752                $headingSubheadingWrapper = Html::rawElement( 'div', [ 'class' => 'mw-heading-subheading-wrapper' ],
753                    Html::rawElement( 'h2', [], $this->msg( 'createacct-benefit-heading-temp-user' )->escaped() )
754                    . Html::rawElement( 'p', [ 'class' => 'mw-benefit-subheading' ], $this->msg(
755                        'createacct-benefit-subheading-temp-user' )->escaped() )
756                );
757
758                $benefitsContainer = Html::rawElement(
759                    'div', [ 'class' => 'mw-createacct-benefits-container' ],
760                    $headingSubheadingWrapper
761                    . $benefitsListWrapper
762                );
763            }
764        }
765        return $benefitsContainer;
766    }
767
768    /**
769     * Generates a form from the given request.
770     * @param AuthenticationRequest[] $requests
771     * @param string $action AuthManager action name
772     * @return HTMLForm
773     */
774    protected function getAuthForm( array $requests, $action ) {
775        // FIXME merge this with parent
776
777        if ( isset( $this->authForm ) ) {
778            return $this->authForm;
779        }
780
781        $usingHTTPS = $this->getRequest()->getProtocol() === 'https';
782
783        // get basic form description from the auth logic
784        $fieldInfo = AuthenticationRequest::mergeFieldInfo( $requests );
785        // this will call onAuthChangeFormFields()
786        $formDescriptor = $this->fieldInfoToFormDescriptor( $requests, $fieldInfo, $this->authAction );
787        $this->postProcessFormDescriptor( $formDescriptor, $requests );
788
789        $context = $this->getContext();
790        if ( $context->getRequest() !== $this->getRequest() ) {
791            // We have overridden the request, need to make sure the form uses that too.
792            $context = new DerivativeContext( $this->getContext() );
793            $context->setRequest( $this->getRequest() );
794        }
795        $form = HTMLForm::factory( 'codex', $formDescriptor, $context );
796
797        $form->addHiddenField( 'authAction', $this->authAction );
798        $form->addHiddenField( 'force', $this->securityLevel );
799        $form->addHiddenField( $this->getTokenName(), $this->getToken()->toString() );
800        $config = $this->getConfig();
801        if ( $config->get( MainConfigNames::SecureLogin ) &&
802        !$config->get( MainConfigNames::ForceHTTPS ) ) {
803            // If using HTTPS coming from HTTP, then the 'fromhttp' parameter must be preserved
804            if ( !$this->isSignup() ) {
805                $form->addHiddenField( 'wpForceHttps', (int)$this->mStickHTTPS );
806                $form->addHiddenField( 'wpFromhttp', $usingHTTPS );
807            }
808        }
809
810        $form->setAction( $this->getPageTitle()->getLocalURL( $this->getPreservedParams(
811            // We have manually set authAction above, so we don't need it in the action URL.
812            [ 'reset' => true ]
813        ) ) );
814        $form->setName( 'userlogin' . ( $this->isSignup() ? '2' : '' ) );
815        if ( $this->isSignup() ) {
816            $form->setId( 'userlogin2' );
817        }
818
819        $form->suppressDefaultSubmit();
820
821        $this->authForm = $form;
822
823        return $form;
824    }
825
826    /** @inheritDoc */
827    public function onAuthChangeFormFields(
828        array $requests, array $fieldInfo, array &$formDescriptor, $action
829    ) {
830        $formDescriptor = self::mergeDefaultFormDescriptor( $fieldInfo, $formDescriptor,
831            $this->getFieldDefinitions( $fieldInfo, $requests ) );
832    }
833
834    /**
835     * Show extra information such as password recovery information, link from login to signup,
836     * CTA etc? Such information should only be shown on the "landing page", ie. when the user
837     * is at the first step of the authentication process.
838     * @return bool
839     */
840    protected function showExtraInformation() {
841        return $this->authAction !== $this->getContinueAction( $this->authAction )
842            && !$this->securityLevel;
843    }
844
845    /**
846     * Create a HTMLForm descriptor for the core login fields.
847     *
848     * @param array $fieldInfo
849     * @param array $requests
850     *
851     * @return array
852     */
853    protected function getFieldDefinitions( array $fieldInfo, array $requests ) {
854        $isLoggedIn = $this->getUser()->isRegistered();
855        $continuePart = $this->isContinued() ? 'continue-' : '';
856        $anotherPart = $isLoggedIn ? 'another-' : '';
857        // @phan-suppress-next-line PhanUndeclaredMethod
858        $expiration = $this->getRequest()->getSession()->getProvider()->getRememberUserDuration();
859        $expirationDays = ceil( $expiration / ( 3600 * 24 ) );
860        $secureLoginLink = '';
861        if ( $this->mSecureLoginUrl ) {
862            $secureLoginLink = Html::rawElement( 'a', [
863                'href' => $this->mSecureLoginUrl,
864                'class' => 'mw-login-flush-right mw-secure',
865            ], Html::element( 'span', [ 'class' => 'mw-secure--icon' ] ) .
866                $this->msg( 'userlogin-signwithsecure' )->parse() );
867        }
868        $usernameHelpLink = '';
869        if ( !$this->msg( 'createacct-helpusername' )->isDisabled() ) {
870            $usernameHelpLink = Html::rawElement( 'span', [
871                'class' => 'mw-login-flush-right',
872            ], $this->msg( 'createacct-helpusername' )->parse() );
873        }
874
875        if ( $this->isSignup() ) {
876            $config = $this->getConfig();
877            $hideIf = isset( $fieldInfo['mailpassword'] ) ? [ 'hide-if' => [ '===', 'mailpassword', '1' ] ] : [];
878            $fieldDefinitions = [
879                'username' => [
880                    'label-raw' => $this->msg( 'userlogin-yourname' )->escaped() . $usernameHelpLink,
881                    'id' => 'wpName2',
882                    'placeholder-message' => $isLoggedIn ? 'createacct-another-username-ph'
883                        : 'userlogin-yourname-ph',
884                ],
885                'mailpassword' => [
886                    // create account without providing password, a temporary one will be mailed
887                    'type' => 'check',
888                    'label-message' => 'createaccountmail',
889                    'name' => 'wpCreateaccountMail',
890                    'id' => 'wpCreateaccountMail',
891                ],
892                'password' => [
893                    'id' => 'wpPassword2',
894                    'autocomplete' => 'new-password',
895                    'placeholder-message' => 'createacct-yourpassword-ph',
896                    'help-message' => 'createacct-useuniquepass',
897                ] + $hideIf,
898                'domain' => [],
899                'retype' => [
900                    'type' => 'password',
901                    'label-message' => 'createacct-yourpasswordagain',
902                    'id' => 'wpRetype',
903                    'cssclass' => 'loginPassword',
904                    'size' => 20,
905                    'autocomplete' => 'new-password',
906                    'validation-callback' => function ( $value, $alldata ) {
907                        if ( empty( $alldata['mailpassword'] ) && !empty( $alldata['password'] ) ) {
908                            if ( !$value ) {
909                                return $this->msg( 'htmlform-required' );
910                            } elseif ( $value !== $alldata['password'] ) {
911                                return $this->msg( 'badretype' );
912                            }
913                        }
914                        return true;
915                    },
916                    'placeholder-message' => 'createacct-yourpasswordagain-ph',
917                ] + $hideIf,
918                'email' => [
919                    'type' => 'email',
920                    'label-message' => $config->get( MainConfigNames::EmailConfirmToEdit )
921                        ? 'createacct-emailrequired' : 'createacct-emailoptional',
922                    'id' => 'wpEmail',
923                    'cssclass' => 'loginText',
924                    'size' => '20',
925                    'maxlength' => 255,
926                    'autocomplete' => 'email',
927                    // FIXME will break non-standard providers
928                    'required' => $config->get( MainConfigNames::EmailConfirmToEdit ),
929                    'validation-callback' => function ( $value, $alldata ) {
930                        // AuthManager will check most of these, but that will make the auth
931                        // session fail and this won't, so nicer to do it this way
932                        if ( !$value &&
933                            $this->getConfig()->get( MainConfigNames::EmailConfirmToEdit )
934                        ) {
935                            // no point in allowing registration without email when email is
936                            // required to edit
937                            return $this->msg( 'noemailtitle' );
938                        } elseif ( !$value && !empty( $alldata['mailpassword'] ) ) {
939                            // cannot send password via email when there is no email address
940                            return $this->msg( 'noemailcreate' );
941                        } elseif ( $value && !Sanitizer::validateEmail( $value ) ) {
942                            return $this->msg( 'invalidemailaddress' );
943                        } elseif ( is_string( $value ) && strlen( $value ) > 255 ) {
944                            return $this->msg( 'changeemail-maxlength' );
945                        }
946                        return true;
947                    },
948                    // The following messages are used here:
949                    // * createacct-email-ph
950                    // * createacct-another-email-ph
951                    'placeholder-message' => 'createacct-' . $anotherPart . 'email-ph',
952                ],
953                'realname' => [
954                    'type' => 'text',
955                    'help-message' => $isLoggedIn ? 'createacct-another-realname-tip'
956                        : 'prefs-help-realname',
957                    'label-message' => 'createacct-realname',
958                    'cssclass' => 'loginText',
959                    'size' => 20,
960                    'placeholder-message' => 'createacct-realname',
961                    'id' => 'wpRealName',
962                    'autocomplete' => 'name',
963                ],
964                'reason' => [
965                    // comment for the user creation log
966                    'type' => 'text',
967                    'label-message' => 'createacct-reason',
968                    'cssclass' => 'loginText',
969                    'id' => 'wpReason',
970                    'size' => '20',
971                    'validation-callback' => function ( $value, $alldata ) {
972                        // if the user sets an email address as the user creation reason, confirm that
973                        // that was their intent
974                        if ( $value && Sanitizer::validateEmail( $value ) ) {
975                            if ( $this->reasonValidatorResult !== null ) {
976                                return $this->reasonValidatorResult;
977                            }
978                            $this->reasonValidatorResult = true;
979                            $authManager = MediaWikiServices::getInstance()->getAuthManager();
980                            if ( !$authManager->getAuthenticationSessionData( 'reason-retry', false ) ) {
981                                $authManager->setAuthenticationSessionData( 'reason-retry', true );
982                                $this->reasonValidatorResult = $this->msg( 'createacct-reason-confirm' );
983                            }
984                            return $this->reasonValidatorResult;
985                        }
986                        return true;
987                    },
988                    'placeholder-message' => 'createacct-reason-ph',
989                ],
990                'createaccount' => [
991                    // submit button
992                    'type' => 'submit',
993                    // The following messages are used here:
994                    // * createacct-submit
995                    // * createacct-another-submit
996                    // * createacct-continue-submit
997                    // * createacct-another-continue-submit
998                    'default' => $this->msg( 'createacct-' . $anotherPart . $continuePart .
999                        'submit' )->text(),
1000                    'name' => 'wpCreateaccount',
1001                    'id' => 'wpCreateaccount',
1002                    'weight' => 100,
1003                ],
1004            ];
1005            if ( !$this->msg( 'createacct-username-help' )->isDisabled() ) {
1006                $fieldDefinitions['username']['help-message'] = 'createacct-username-help';
1007            }
1008        } else {
1009            // When the user's password is too weak, they might be asked to provide a stronger one
1010            // as a followup step. That is a form with only two fields, 'password' and 'retype',
1011            // and they should behave more like account creation.
1012            $passwordRequest = AuthenticationRequest::getRequestByClass( $this->authRequests,
1013                PasswordAuthenticationRequest::class );
1014            $changePassword = $passwordRequest && $passwordRequest->action == AuthManager::ACTION_CHANGE;
1015            $fieldDefinitions = [
1016                'username' => (
1017                    [
1018                        'label-raw' => $this->msg( 'userlogin-yourname' )->escaped() . $secureLoginLink,
1019                        'id' => 'wpName1',
1020                        'placeholder-message' => 'userlogin-yourname-ph',
1021                    ] + ( $changePassword ? [
1022                        // There is no username field on the AuthManager level when changing
1023                        // passwords. Fake one because password
1024                        'baseField' => 'password',
1025                        'nodata' => true,
1026                        'readonly' => true,
1027                        'cssclass' => 'mw-htmlform-hidden-field',
1028                    ] : [] )
1029                ),
1030                'password' => (
1031                    $changePassword ? [
1032                        'autocomplete' => 'new-password',
1033                        'placeholder-message' => 'createacct-yourpassword-ph',
1034                        'help-message' => 'createacct-useuniquepass',
1035                    ] : [
1036                        'id' => 'wpPassword1',
1037                        'autocomplete' => 'current-password',
1038                        'placeholder-message' => 'userlogin-yourpassword-ph',
1039                    ]
1040                ),
1041                'retype' => [
1042                    'type' => 'password',
1043                    'autocomplete' => 'new-password',
1044                    'placeholder-message' => 'createacct-yourpasswordagain-ph',
1045                ],
1046                'domain' => [],
1047                'rememberMe' => [
1048                    // option for saving the user token to a cookie
1049                    'type' => 'check',
1050                    'cssclass' => 'mw-userlogin-rememberme',
1051                    'name' => 'wpRemember',
1052                    'label-message' => $this->msg( 'userlogin-remembermypassword' )
1053                        ->numParams( $expirationDays ),
1054                    'id' => 'wpRemember',
1055                ],
1056                'loginattempt' => [
1057                    // submit button
1058                    'type' => 'submit',
1059                    // The following messages are used here:
1060                    // * pt-login-button
1061                    // * pt-login-continue-button
1062                    'default' => $this->msg( 'pt-login-' . $continuePart . 'button' )->text(),
1063                    'id' => 'wpLoginAttempt',
1064                    'weight' => 100,
1065                ],
1066                'linkcontainer' => [
1067                    // help link
1068                    'type' => 'info',
1069                    'cssclass' => 'mw-form-related-link-container mw-userlogin-help',
1070                    // 'id' => 'mw-userlogin-help', // FIXME HTMLInfoField ignores this
1071                    'raw' => true,
1072                    'default' => Html::element( 'a', [
1073                        'href' => Skin::makeInternalOrExternalUrl( $this->msg( 'helplogin-url' )
1074                            ->inContentLanguage()
1075                            ->text() ),
1076                    ], $this->msg( 'userlogin-helplink2' )->text() ),
1077                    'weight' => 200,
1078                ],
1079                // button for ResetPasswordSecondaryAuthenticationProvider
1080                'skipReset' => [
1081                    'weight' => 110,
1082                    'flags' => [],
1083                ],
1084            ];
1085        }
1086
1087        // T369641: We want to ensure that this transformation to the username and/or
1088        // password fields are applied only when we have matching requests within the
1089        // authentication manager.
1090        $isUsernameOrPasswordRequest =
1091            AuthenticationRequest::getRequestByClass( $requests, UsernameAuthenticationRequest::class ) ||
1092            AuthenticationRequest::getRequestByClass( $requests, PasswordAuthenticationRequest::class );
1093
1094        if ( $isUsernameOrPasswordRequest ) {
1095            $fieldDefinitions['username'] += [
1096                'type' => 'text',
1097                'name' => 'wpName',
1098                'cssclass' => 'loginText mw-userlogin-username',
1099                'size' => 20,
1100                'autocomplete' => 'username',
1101                // 'required' => true,
1102            ];
1103            $fieldDefinitions['password'] += [
1104                'type' => 'password',
1105                // 'label-message' => 'userlogin-yourpassword', // would override the changepassword label
1106                'name' => 'wpPassword',
1107                'cssclass' => 'loginPassword mw-userlogin-password',
1108                'size' => 20,
1109                // 'required' => true,
1110            ];
1111        }
1112
1113        if ( $this->mEntryError ) {
1114            $defaultHtml = '';
1115            if ( $this->mEntryErrorType === 'error' ) {
1116                $defaultHtml = Html::errorBox( $this->mEntryError );
1117            } elseif ( $this->mEntryErrorType === 'warning' ) {
1118                $defaultHtml = Html::warningBox( $this->mEntryError );
1119            } elseif ( $this->mEntryErrorType === 'notice' ) {
1120                $defaultHtml = Html::noticeBox( $this->mEntryError, '' );
1121            }
1122            $fieldDefinitions['entryError'] = [
1123                'type' => 'info',
1124                'default' => $defaultHtml,
1125                'raw' => true,
1126                'rawrow' => true,
1127                'weight' => -100,
1128            ];
1129        }
1130        if ( !$this->showExtraInformation() ) {
1131            unset( $fieldDefinitions['linkcontainer'], $fieldDefinitions['signupend'] );
1132        }
1133        if ( $this->isSignup() && $this->showExtraInformation() ) {
1134            // blank signup footer for site customization
1135            // uses signupend-https for HTTPS requests if it's not blank, signupend otherwise
1136            $signupendMsg = $this->msg( 'signupend' );
1137            $signupendHttpsMsg = $this->msg( 'signupend-https' );
1138            if ( !$signupendMsg->isDisabled() ) {
1139                $usingHTTPS = $this->getRequest()->getProtocol() === 'https';
1140                $signupendText = ( $usingHTTPS && !$signupendHttpsMsg->isBlank() )
1141                    ? $signupendHttpsMsg->parse() : $signupendMsg->parse();
1142                $fieldDefinitions['signupend'] = [
1143                    'type' => 'info',
1144                    'raw' => true,
1145                    'default' => Html::rawElement( 'div', [ 'id' => 'signupend' ], $signupendText ),
1146                    'weight' => 225,
1147                ];
1148            }
1149        }
1150        if ( !$this->isSignup() && $this->showExtraInformation() ) {
1151            $passwordReset = MediaWikiServices::getInstance()->getPasswordReset();
1152            if ( $passwordReset->isAllowed( $this->getUser() )->isGood() ) {
1153                $fieldDefinitions['passwordReset'] = [
1154                    'type' => 'info',
1155                    'raw' => true,
1156                    'cssclass' => 'mw-form-related-link-container',
1157                    'default' => $this->getLinkRenderer()->makeLink(
1158                        SpecialPage::getTitleFor( 'PasswordReset' ),
1159                        $this->msg( 'userlogin-resetpassword-link' )->text()
1160                    ),
1161                    'weight' => 230,
1162                ];
1163            }
1164
1165            // Don't show a "create account" link if the user can't.
1166            if ( $this->showCreateAccountLink() ) {
1167                // link to the other action
1168                $linkTitle = $this->getTitleFor( $this->isSignup() ? 'Userlogin' : 'CreateAccount' );
1169                $linkq = wfArrayToCgi( $this->getPreservedParams( [ 'reset' => true ] ) );
1170                $isLoggedIn = $this->getUser()->isRegistered()
1171                    && !$this->getUser()->isTemp();
1172
1173                $fieldDefinitions['createOrLogin'] = [
1174                    'type' => 'info',
1175                    'raw' => true,
1176                    'linkQuery' => $linkq,
1177                    'default' => function ( $params ) use ( $isLoggedIn, $linkTitle ) {
1178                        $buttonClasses = 'cdx-button cdx-button--action-progressive '
1179                            . 'cdx-button--fake-button cdx-button--fake-button--enabled';
1180
1181                        return Html::rawElement( 'div',
1182                            // The following element IDs are used here:
1183                            // mw-createaccount, mw-createaccount-cta
1184                            [ 'id' => 'mw-createaccount' . ( !$isLoggedIn ? '-cta' : '' ),
1185                                'class' => ( $isLoggedIn ? 'mw-form-related-link-container' : 'mw-ui-vform-field' ) ],
1186                            ( $isLoggedIn ? '' : $this->msg( 'userlogin-noaccount' )->escaped() )
1187                            . Html::element( 'a',
1188                                [
1189                                    // The following element IDs are used here:
1190                                    // mw-createaccount-join, mw-createaccount-join-loggedin
1191                                    'id' => 'mw-createaccount-join' . ( $isLoggedIn ? '-loggedin' : '' ),
1192                                    'href' => $linkTitle->getLocalURL( $params['linkQuery'] ),
1193                                    'class' => [ 'mw-authentication-popup-link', $buttonClasses => !$isLoggedIn ],
1194                                    'target' => '_self',
1195                                    'tabindex' => 100,
1196                                ],
1197                                $this->msg(
1198                                    $isLoggedIn ? 'userlogin-createanother' : 'userlogin-joinproject'
1199                                )->text()
1200                            )
1201                        );
1202                    },
1203                    'weight' => 235,
1204                ];
1205            }
1206        }
1207
1208        return $fieldDefinitions;
1209    }
1210
1211    /**
1212     * Check if a session cookie is present.
1213     *
1214     * This will not pick up a cookie set during _this_ request, but is meant
1215     * to ensure that the client is returning the cookie which was set on a
1216     * previous pass through the system.
1217     *
1218     * @return bool
1219     */
1220    protected function hasSessionCookie() {
1221        global $wgInitialSessionId;
1222
1223        return $wgInitialSessionId &&
1224            $this->getRequest()->getSession()->getId() === (string)$wgInitialSessionId;
1225    }
1226
1227    /**
1228     * Whether the login/create account form should display a link to the
1229     * other form (in addition to whatever the skin provides).
1230     * @return bool
1231     */
1232    private function showCreateAccountLink() {
1233        return $this->isSignup() ||
1234            $this->getContext()->getAuthority()->isAllowed( 'createaccount' );
1235    }
1236
1237    protected function getTokenName() {
1238        return $this->isSignup() ? 'wpCreateaccountToken' : 'wpLoginToken';
1239    }
1240
1241    /**
1242     * Produce a bar of links which allow the user to select another language
1243     * during login/registration but retain "returnto"
1244     *
1245     * @return string
1246     */
1247    protected function makeLanguageSelector() {
1248        $msg = $this->msg( 'loginlanguagelinks' )->inContentLanguage();
1249        if ( $msg->isBlank() ) {
1250            return '';
1251        }
1252        $langs = explode( "\n", $msg->text() );
1253        $links = [];
1254        foreach ( $langs as $lang ) {
1255            $lang = trim( $lang, '* ' );
1256            $parts = explode( '|', $lang );
1257            if ( count( $parts ) >= 2 ) {
1258                $links[] = $this->makeLanguageSelectorLink( $parts[0], trim( $parts[1] ) );
1259            }
1260        }
1261
1262        return count( $links ) > 0 ? $this->msg( 'loginlanguagelabel' )->rawParams(
1263            $this->getLanguage()->pipeList( $links ) )->escaped() : '';
1264    }
1265
1266    /**
1267     * Create a language selector link for a particular language
1268     * Links back to this page preserving type and returnto
1269     *
1270     * @param string $text Link text
1271     * @param string $lang Language code
1272     * @return string
1273     */
1274    protected function makeLanguageSelectorLink( $text, $lang ) {
1275        if ( $this->getLanguage()->getCode() == $lang ) {
1276            // no link for currently used language
1277            return htmlspecialchars( $text );
1278        }
1279        $query = $this->getPreservedParams();
1280        $query['uselang'] = $lang;
1281
1282        $attr = [];
1283        $targetLanguage = MediaWikiServices::getInstance()->getLanguageFactory()
1284            ->getLanguage( $lang );
1285        $attr['lang'] = $attr['hreflang'] = $targetLanguage->getHtmlCode();
1286        $attr['class'] = 'mw-authentication-popup-link';
1287        $attr['title'] = false;
1288
1289        return $this->getLinkRenderer()->makeKnownLink(
1290            $this->getPageTitle(),
1291            $text,
1292            $attr,
1293            $query
1294        );
1295    }
1296
1297    protected function getGroupName() {
1298        return 'login';
1299    }
1300
1301    /**
1302     * @param array &$formDescriptor
1303     * @param array $requests
1304     */
1305    protected function postProcessFormDescriptor( &$formDescriptor, $requests ) {
1306        // Pre-fill username (if not creating an account, T46775).
1307        if (
1308            isset( $formDescriptor['username'] ) &&
1309            !isset( $formDescriptor['username']['default'] ) &&
1310            !$this->isSignup()
1311        ) {
1312            $user = $this->getUser();
1313            if ( $user->isRegistered() && !$user->isTemp() ) {
1314                $formDescriptor['username']['default'] = $user->getName();
1315            } else {
1316                $formDescriptor['username']['default'] =
1317                    $this->getRequest()->getSession()->suggestLoginUsername();
1318            }
1319        }
1320
1321        // don't show a submit button if there is nothing to submit (i.e. the only form content
1322        // is other submit buttons, for redirect flows)
1323        if ( !$this->needsSubmitButton( $requests ) ) {
1324            unset( $formDescriptor['createaccount'], $formDescriptor['loginattempt'] );
1325        }
1326
1327        if ( !$this->isSignup() ) {
1328            // FIXME HACK don't focus on non-empty field
1329            // maybe there should be an autofocus-if similar to hide-if?
1330            if (
1331                isset( $formDescriptor['username'] )
1332                && empty( $formDescriptor['username']['default'] )
1333                && !$this->getRequest()->getCheck( 'wpName' )
1334            ) {
1335                $formDescriptor['username']['autofocus'] = true;
1336            } elseif ( isset( $formDescriptor['password'] ) ) {
1337                $formDescriptor['password']['autofocus'] = true;
1338            }
1339        }
1340
1341        $this->addTabIndex( $formDescriptor );
1342    }
1343
1344    /**
1345     * Generates the HTML for a notice box to be displayed to a temporary user.
1346     *
1347     * @return string HTML representing the notice box
1348     */
1349    protected function getNoticeHtml() {
1350        $noticeContent = $this->msg( 'createacct-temp-warning', $this->getUser()->getName() )->parse();
1351        return Html::noticeBox(
1352            $noticeContent,
1353            'mw-createaccount-temp-warning',
1354            '',
1355            'mw-userLogin-icon--user-temporary'
1356        );
1357    }
1358
1359}
1360
1361/** @deprecated class alias since 1.41 */
1362class_alias( LoginSignupSpecialPage::class, 'LoginSignupSpecialPage' );