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mediawiki-scratch-login/ScratchLogin.common.php /
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| <?php | |
| use Wikimedia\Timestamp\ConvertibleTimestamp; | |
| define('USER_API_LINK', 'https://api.scratch.mit.edu/users/%s/'); | |
| function getAuthenticator() { | |
| global $wgScratchLoginAuthenticator; | |
| switch ($wgScratchLoginAuthenticator) { | |
| case 'cloud': { | |
| return ScratchLogin\Authenticator\CloudVariableAuthenticator::class; | |
| } | |
| default: { | |
| return ScratchLogin\Authenticator\ProjectCommentAuthenticator::class; | |
| } | |
| } | |
| } | |
| function getScratchUserRegisteredAt($username) { | |
| $apiText = file_get_contents(sprintf( | |
| USER_API_LINK, $username | |
| )); | |
| //fail loudly if the API call fails | |
| if (!isset($http_response_header)) { | |
| throw new Exception('API call failed'); | |
| } | |
| //this shouldn't happen, but since this is a security-sensitive component we need to be ultra-defensive | |
| if (!strstr($http_response_header[0], '200 OK')) { | |
| throw new Exception('User does not exist'); | |
| } | |
| $info = json_decode($apiText, true); | |
| $registeredAt = $info['history']['joined']; | |
| return new ConvertibleTimestamp($registeredAt); | |
| } | |
| class ScratchSpecialPage extends SpecialPage { | |
| function execute($par) { | |
| $request = $this->getRequest(); | |
| $out = $this->getOutput(); | |
| $out->disallowUserJs(); | |
| $this->setHeaders(); | |
| $this->checkReadOnly(); | |
| if ($par == 'reset') { | |
| $this->resetCode( $out, $request ); | |
| } else if ($request->wasPosted()) { | |
| $this->onPost( $out, $request ); | |
| } else { | |
| $this->showForm( $out, $request ); | |
| } | |
| } | |
| // show an error followed by the login form again | |
| function showError($error, $out, $request) { | |
| $out->addHTML(Html::rawElement('p', [ 'class' => 'error' ], $error)); | |
| $this->showForm($out, $request); | |
| } | |
| // $instructions: message key giving instructions for this page | |
| // $action: message key for button value | |
| function verifForm($out, $request, $instructions, $action) { | |
| $authenticator = getAuthenticator(); | |
| // this all takes place in a form | |
| $out->addHTML(Html::openElement( | |
| 'form', | |
| [ 'method' => 'POST' ] | |
| )); | |
| $session = $request->getSession(); | |
| $out->addHTML($authenticator::getInstructions( | |
| $instructions, | |
| $session, | |
| $this | |
| )->inContentLanguage()->parseAsBlock()); | |
| // show the submit button | |
| $out->addHTML(Html::rawElement( | |
| 'input', | |
| [ | |
| 'type' => 'submit', | |
| 'id' => 'mw-scratchlogin-form-submit', | |
| 'value' => wfMessage($action)->inContentLanguage()->plain() | |
| ] | |
| )); | |
| //close the form | |
| $out->addHTML(Html::closeElement( 'form' )); | |
| } | |
| function verifSucceeded($out, $request) { | |
| $session = $request->getSession(); | |
| $authenticator = getAuthenticator(); | |
| $username = $authenticator::getAssociatedUsername($session, $this); | |
| if ($username == null) { | |
| $this->showError( | |
| $authenticator::getMissingMsg($this) | |
| ->inContentLanguage()->plain(), | |
| $out, $request | |
| ); | |
| return null; | |
| } | |
| // now attempt to retrieve the MediaWiki user | |
| // associated with whoever commented the verification code | |
| $user = User::newFromName($username); | |
| // ...if that user does not exist, then show an error | |
| // that this account does not exist on the wiki | |
| if ($user->getId() == 0) { | |
| $this->showError( | |
| wfMessage('scratchlogin-unregistered', $username) | |
| ->inContentLanguage()->parse(), | |
| $out, $request | |
| ); | |
| return null; | |
| } | |
| try { | |
| $wikiUserTimestamp = new ConvertibleTimestamp($user->getRegistration()); | |
| $scratchUserTimestamp = getScratchUserRegisteredAt($username); | |
| $diff = $scratchUserTimestamp->diff($wikiUserTimestamp); | |
| if ($diff->invert) { | |
| // Scratch user registered after wiki user. | |
| // To prevent disaster, make it error. | |
| $this->showError( | |
| wfMessage('scratchlogin-account-age-error', $username) | |
| ->inContentLanguage()->parse(), | |
| $out, $request | |
| ); | |
| return null; | |
| } | |
| } catch (Exception $e) { | |
| //in the event of any failure, do NOT allow the login attempt to continue | |
| $this->showError(wfMessage('scratchlogin-api-failure')->inContentLanguage()->parse(), $out, $request); | |
| return null; | |
| } | |
| // clear the verification code in the session so that they have to | |
| // use a different code to login as a different user | |
| $authenticator::clearAuthCode($session); | |
| return $user; | |
| } | |
| // reset the code associated with the current user's session | |
| function doCodeReset($out, $request, $returnto) { | |
| $session = $request->getSession(); | |
| $authenticator = getAuthenticator(); | |
| $authenticator::clearAuthCode($session); | |
| $out->addWikiMsg('scratchlogin-code-reset', $returnto); | |
| } | |
| } |