view.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/>.

/**
 * Page to view the course reports
 *
 * @package    core
 * @subpackage report
 * @copyright  2021 Sujith Haridasan
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

// Course id.
$courseid = required_param('courseid', PARAM_INT);

$PAGE->set_url(new moodle_url('/report/view.php', array('courseid' => $courseid)));

// Basic access checks.
if (!$course = $DB->get_record('course', array('id' => $courseid))) {
    throw new \moodle_exception('invalidcourseid');
}
require_login($course);

// Otherwise, output the page with a notification stating that there are no available course reports.
$PAGE->set_title(get_string('reports'));
$PAGE->set_pagelayout('incourse');
$PAGE->set_heading($course->fullname);
$PAGE->set_pagetype('course-view-' . $course->format);
$PAGE->add_body_class('limitedwidth');

echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('reports'));

// Check if there is at least one displayable report.
$hasreports = false;
if ($reportnode = $PAGE->settingsnav->find('coursereports', \navigation_node::TYPE_CONTAINER)) {
    foreach ($reportnode->children as $child) {
        if ($child->display) {
            $hasreports = true;
            break;
        }
    }
}

if ($hasreports) {
    echo $OUTPUT->render_from_template('core/report_link_page', ['node' => $reportnode]);
} else {
    echo html_writer::div($OUTPUT->notification(get_string('noreports', 'debug'), 'error'), 'mt-3');
}
echo $OUTPUT->footer();