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/>.

/**
 * Prints a particular instance of googledocs
 *
 * You can have a rather longer description of the file as well,
 * if you like, and it can span multiple lines.
 *
 * @package    mod_googledocs
 * @copyright  2019 Michael de Raadt <michaelderaadt@gmail.com>
 *             2020 Veronica Bermegui
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 *
 */

require_once(dirname(dirname(dirname(__FILE__))).'/config.php');
require_once(dirname(__FILE__).'/lib.php');
require_once($CFG->dirroot . '/mod/assign/locallib.php');
require_once($CFG->dirroot . '/mod/googledocs/locallib.php');

$id = optional_param('id', 0, PARAM_INT); // Course_module ID, or
$n  = optional_param('n', 0, PARAM_INT);  // ... googledocs instance ID - it should be named as the first character of the module.

if ($id) {
    $cm         = get_coursemodule_from_id('googledocs', $id, 0, false, MUST_EXIST);
    $course     = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
    $googledocs  = $DB->get_record('googledocs', array('id' => $cm->instance), '*', MUST_EXIST);
} else if ($n) {
    $googledocs  = $DB->get_record('googledocs', array('id' => $n), '*', MUST_EXIST);
    $course     = $DB->get_record('course', array('id' => $googledocs->course), '*', MUST_EXIST);
    $cm         = get_coursemodule_from_instance('googledocs', $googledocs->id, $course->id, false, MUST_EXIST);
} else {
    print_error('You must specify a course_module ID or an instance ID');
}

require_login($course, true, $cm);

$url = new moodle_url('/mod/assign/view.php', array('id' => $cm->id));
$PAGE->set_url($url);
$PAGE->set_heading(format_string($course->fullname));
$PAGE->set_title(format_string($googledocs->name));


// Output starts here.
echo $OUTPUT->header();

users_files_renderer($googledocs->id);

// Finish the page.
echo $OUTPUT->footer();