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<?php // This file is part of Moodle - http://moodle.org/ // // Moodle is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Moodle is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Moodle. If not, see <http://www.gnu.org/licenses/>. /** * Page allowing a platform user, identified by their {iss, sub} tuple, to be bound to a new or existing Moodle account. * * This is an LTI Advantage specific login feature. * * The auth flow defined in auth_lti\auth::complete_login() redirects here when a launching user does not have an * account binding yet. This page prompts the user to select between: * a) An auto provisioned account. * An account with auth type 'lti' is created for the user. This account is bound to the launch credentials. * Or * b) Use an existing account * The standard Moodle auth flow is leveraged to get an existing user account. This account is then bound to the launch * credentials. * * @package auth_lti * @copyright 2021 Jake Dallimore <jrhdallimore@gmail.com> * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ use core\event\user_login_failed; use core\output\notification; require_once(__DIR__ . '/../../config.php'); global $OUTPUT, $PAGE, $SESSION; // Form fields dealing with the user's choice about account types (new, existing). $newaccount = optional_param('new_account', false, PARAM_BOOL); $existingaccount = optional_param('existing_account', false, PARAM_BOOL); if (empty($SESSION->auth_lti) \|\| empty($SESSION->auth_lti->launchdata)) { throw new coding_exception('Missing LTI launch credentials.'); } if (empty($SESSION->auth_lti->returnurl)) { throw new coding_exception('Missing return URL.'); } if ($newaccount) { require_sesskey(); $launchdata = $SESSION->auth_lti->launchdata; $returnurl = $SESSION->auth_lti->returnurl; unset($SESSION->auth_lti); if (!empty($CFG->authpreventaccountcreation)) { // If 'authpreventaccountcreation' is enabled, the option to create a new account isn't presented to users in the form. // This just ensures no action is taken were the 'newaccount' value to be present in the submitted data. // Trigger login failed event. $failurereason = AUTH_LOGIN_UNAUTHORISED; $event = user_login_failed::create(['other' => ['reason' => $failurereason]]); $event->trigger(); // Site settings prevent creating new accounts. $errormsg = get_string('cannotcreateaccounts', 'auth_lti'); $SESSION->loginerrormsg = $errormsg; redirect(new moodle_url('/login/index.php')); } else { // Create a new account and link it, logging the user in. $auth = get_auth_plugin('lti'); $newuser = $auth->find_or_create_user_from_launch($launchdata, true); complete_user_login($newuser); $PAGE->set_context(context_system::instance()); $PAGE->set_url(new moodle_url('/auth/lti/login.php')); $PAGE->set_pagelayout('popup'); $renderer = $PAGE->get_renderer('auth_lti'); echo $OUTPUT->header(); echo $renderer->render_account_binding_complete( new notification(get_string('accountcreatedsuccess', 'auth_lti'), notification::NOTIFY_SUCCESS, false), $returnurl ); echo $OUTPUT->footer(); exit(); } } else if ($existingaccount) { // Only when authenticated can an account be bound, allowing the user to continue to the original launch action. require_login(null, false); require_sesskey(); $launchdata = $SESSION->auth_lti->launchdata; $returnurl = $SESSION->auth_lti->returnurl; unset($SESSION->auth_lti); global $USER; $auth = get_auth_plugin('lti'); $auth->create_user_binding($launchdata['iss'], $launchdata['sub'], $USER->id); $PAGE->set_context(context_system::instance()); $PAGE->set_url(new moodle_url('/auth/lti/login.php')); $PAGE->set_pagelayout('popup'); $renderer = $PAGE->get_renderer('auth_lti'); echo $OUTPUT->header(); echo $renderer->render_account_binding_complete( new notification(get_string('accountlinkedsuccess', 'auth_lti'), notification::NOTIFY_SUCCESS, false), $returnurl ); echo $OUTPUT->footer(); exit(); } // Render the relevant account provisioning page, based on the provisioningmode set in the calling code. $PAGE->set_context(context_system::instance()); $PAGE->set_url(new moodle_url('/auth/lti/login.php')); $PAGE->set_pagelayout('popup'); $renderer = $PAGE->get_renderer('auth_lti'); echo $OUTPUT->header(); require_once($CFG->dirroot . '/auth/lti/auth.php'); echo $renderer->render_account_binding_options_page($SESSION->auth_lti->provisioningmode); echo $OUTPUT->footer();

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