class.ilAuthFrontendCredentialsLTI.php

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<?php

declare(strict_types=1);

class ilAuthFrontendCredentialsLTI extends ilAuthFrontendCredentials implements ilAuthCredentials
{
    public function __construct()
    {
        parent::__construct();
        // overwrite default lti logger
        //        $this->setLogger($GLOBALS['DIC']->logger()->lti());
    }



    public function initFromRequest(): void
    {
        global $DIC;
        $logger = ilLoggerFactory::getLogger('ltis');
        $logger->debug('New lti authentication request...');
        $user_id = '';
        if ($DIC->http()->wrapper()->post()->has('login_hint')) {
            $logger->debug('LTI 1.3 initiate login...');
            $user_id = $DIC->http()->wrapper()->post()->retrieve('login_hint', $DIC->refinery()->kindlyTo()->string());
            ilSession::set("lti13_initiate_login", $user_id);
        }
        if ($DIC->http()->wrapper()->post()->has('user_id')) {
            $user_id = $DIC->http()->wrapper()->post()->retrieve('user_id', $DIC->refinery()->kindlyTo()->string());
        }
        if (empty($user_id) && ilSession::has("lti13_initiate_login")) {
            $user_id = ilSession::get("lti13_initiate_login");
            ilSession::clear("lti13_initiate_login");
        }
        // ToDo: Error Handling
        // if (empty($user_id)) {}
        $this->setUsername($user_id);
    }
}