/
tool.php
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/
tool.php
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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/>.
/**
* Launch destination url. Main entry point for the external system.
*
* @package local
* @subpackage ltiprovider
* @copyright 2011 Juan Leyva <juanleyvadelgado@gmail.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(__FILE__) . '/../../config.php');
require_once($CFG->dirroot.'/local/ltiprovider/ims-blti/blti.php');
$toolid = required_param('id', PARAM_INT);
if (! ($tool = $DB->get_record('local_ltiprovider', array('id'=>$toolid)))) {
print_error('invalidtoolid', 'local_ltiprovider');
}
if ($tool->disabled) {
print_error('tooldisabled', 'local_ltiprovider');
}
// Do not set session, do not redirect
$context = new BLTI($tool->secret, false, false);
// Correct launch request
if ($context->valid) {
// Check that we can perform enrolments
if (enrol_is_enabled('manual')) {
$manual = enrol_get_plugin('manual');
} else {
print_error('nomanualenrol', 'local_ltiprovider');
}
// Transform to utf8 all the post and get data
$textlib = textlib_get_instance();
foreach ($_POST as $key => $value) {
$_POST[$key] = $textlib->convert($value, $tool->encoding);
}
foreach ($_GET as $key => $value) {
$_GET[$key] = $textlib->convert($value, $tool->encoding);
}
// We need an username without extended chars
$username = 'ltiprovider'.md5($context->getUserKey());
// Check if the user exists
$user = $DB->get_record('user', array('username' => $username));
if (! $user) {
$user = new stdClass();
// clean_param , email username text
$user->auth = 'nologin';
$user->username = $username;
$user->password = md5(uniqid(rand(), 1));
$user->firstname = optional_param('lis_person_name_given', '', PARAM_TEXT);
$user->lastname = optional_param('lis_person_name_family', '', PARAM_TEXT);
$user->email = clean_param($context->getUserEmail(), PARAM_EMAIL);
$user->city = $tool->city;
$user->country = $tool->country;
$user->institution = $tool->institution;
$user->timezone = $tool->timezone;
$user->maildisplay = $tool->maildisplay;
$user->lang = $tool->lang;
if (! $user->lang and isset($_POST['launch_presentation_locale'])) {
$user->lang = optional_param('launch_presentation_locale', '', PARAM_LANG);
}
if (! $user->lang) {
// TODO: This should be changed for detect the course lang
$user->lang = current_language();
}
$user->id = $DB->insert_record('user', $user);
// Reload full user
$user = $DB->get_record('user', array('id' => $user->id));
}
// Enrol user in course and activity if needed
if (! $context = $DB->get_record('context', array('id' => $tool->contextid))) {
print_error("invalidcontext");
}
if ($context->contextlevel == CONTEXT_COURSE) {
$courseid = $context->instanceid;
$urltogo = $CFG->wwwroot.'/course/view.php?id='.$courseid;
} else if ($context->contextlevel == CONTEXT_MODULE) {
$cmid = $context->instanceid;
$cm = get_coursemodule_from_id(false, $context->instanceid, 0, false, MUST_EXIST);
$courseid = $cm->course;
$urltogo = $CFG->wwwroot.'/mod/'.$cm->modname.'/view.php?id='.$cm->id;
} else {
print_error("invalidcontext");
}
$course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
// Enrol the user in the course
$roles = explode(',', $_POST['roles']);
$role =(in_array('Instructor', $roles))? 'Instructor' : 'Learner';
$today = time();
$today = make_timestamp(date('Y', $today), date('m', $today), date('d', $today), 0, 0, 0);
$timeend = 0;
if (isset($tool->enrolduration) and $tool->enrolduration) {
$duration = (int)$tool->enrolduration * 60*60*24; // convert days to seconds
if ($duration > 0) { // sanity check
$timeend = $today + $duration;
}
}
// Course role id for the Instructor or Learner
// TODO Do something with lti system admin (urn:lti:sysrole:ims/lis/Administrator)
$roleid = ($role == 'Instructor')? $tool->croleinst: $tool->crolelearn;
if ($instances = enrol_get_instances($course->id, false)) {
foreach ($instances as $instance) {
if ($instance->enrol === 'manual') {
$manual->enrol_user($instance, $user->id, $roleid, $today, $timeend);
break;
}
}
}
if ($context->contextlevel == CONTEXT_MODULE) {
// Enrol the user in the activity
if (($tool->aroleinst and $role == 'Instructor') or ($tool->arolelearn and $role == 'Learner')) {
$roleid = ($role == 'Instructor')? $tool->aroleinst: $tool->arolelearn;
role_assign($roleid, $user->id, $tool->contextid);
}
}
// Login user
$sourceid = optional_param('lis_result_sourcedid', '', PARAM_RAW);
if ($userlog = $DB->get_record('local_ltiprovider_user', array('toolid' => $tool->id, 'userid' => $user->id)) and $userlog->sourceid == $sourceid) {
$DB->set_field('local_ltiprovider_user', 'lastaccess', time(), array('id' => $userlog->id));
} else {
// These data is needed for sending backup outcomes (aka grades)
$userlog = new stdClass();
$userlog->userid = $user->id;
$userlog->toolid = $tool->id;
// TODO Improve these checks
$userlog->serviceurl = optional_param('lis_outcome_service_url', '', PARAM_RAW);
$userlog->sourceid = $sourceid;
$userlog->consumerkey = optional_param('oauth_consumer_key', '', PARAM_RAW);
// TODO Do not store secret here
$userlog->consumersecret = $tool->secret;
$userlog->lastsync = 0;
$userlog->lastgrade = 0;
$userlog->lastaccess = time();
$DB->insert_record('local_ltiprovider_user', $userlog);
}
add_to_log(SITEID, 'user', 'login', $urltogo, "ltiprovider login", 0, $user->id);
$tool->context = $context;
$SESSION->ltiprovider = $tool;
complete_user_login($user);
redirect($urltogo);
} else {
//print_error('invalidcredentials', 'local_ltiprovider');
echo $context->message;
}