index.php

<?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/>.

/**
 * Confirmation page for a user to authenticate with a second factor.
 *
 * If the user presses the button to continue, the `auth.php` page is requested next.
 *
 * @package      availability_shibboleth2fa
 * @copyright    2021 Lars Bonczek, innoCampus, TU Berlin
 * @license      http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 *
 * {@noinspection PhpUnhandledExceptionInspection}
 */

use availability_shibboleth2fa\condition;

require(__DIR__ . '/../../../config.php');

global $OUTPUT, $PAGE, $USER;

$courseid = required_param('id', PARAM_INT);
$cmid = optional_param('cmid', null, PARAM_INT);
$sectionid = optional_param('sectionid', null, PARAM_INT);

if ($cmid) {
    [$course, $cm] = get_course_and_cm_from_cmid($cmid);
} else {
    [$course, $cm] = [get_course($courseid), null];
}

$url = new moodle_url('/availability/condition/shibboleth2fa/index.php', ['id' => $course->id]);
if ($cmid) {
    $url->param('cmid', $cmid);
}
if ($sectionid) {
    $url->param('sectionid', $sectionid);
}
$PAGE->set_url($url);

require_login($course, false);

$PAGE->set_title(get_string('fulltitle', 'availability_shibboleth2fa'));
$PAGE->set_heading($course->fullname);
echo $OUTPUT->header();

$format = course_get_format($course);
$courseurl = $format->get_view_url(null);

if (condition::is_course_available($course->id, $USER->id)) {
    // Continue to unlocked content.
    if ($cm) {
        $continueurl = new moodle_url("/mod/$cm->modname/view.php", ['id' => $cm->id]);
    } else {
        $continueurl = $format->get_view_url($sectionid);
    }
    $continuetext = get_string('login_successful', 'availability_shibboleth2fa');
} else {
    // Continue to 2FA auth page.
    $continueurl = new moodle_url('/availability/condition/shibboleth2fa/auth.php', ['id' => $course->id]);
    if ($cmid) {
        $continueurl->param('cmid', $cmid);
    }
    if ($sectionid) {
        $continueurl->param('sectionid', $sectionid);
    }
    $continuetext = get_string('login_required', 'availability_shibboleth2fa');
}

// Create button ourselves because we do not want to post.
$btn = new single_button(
    url: $continueurl,
    label: get_string('continue'),
    method: 'get',
    type: single_button::BUTTON_PRIMARY,
);
echo $OUTPUT->confirm($continuetext, $btn, $courseurl);

echo $OUTPUT->footer();