Exemplo n.º 1
0
/**
 * Cron function for sync grades
 * @return void
 */
function local_ltiprovider_cron()
{
    global $DB, $CFG;
    require_once $CFG->dirroot . "/local/ltiprovider/locallib.php";
    require_once $CFG->dirroot . "/local/ltiprovider/ims-blti/OAuth.php";
    require_once $CFG->dirroot . "/local/ltiprovider/ims-blti/OAuthBody.php";
    require_once $CFG->libdir . '/gradelib.php';
    require_once $CFG->dirroot . '/grade/querylib.php';
    // TODO - Add a global setting for this
    $synctime = 60 * 60;
    // Every 1 hour grades are sync
    $timenow = time();
    mtrace('Running cron for ltiprovider');
    mtrace('Deleting LTI tools assigned to deleted courses');
    if ($tools = $DB->get_records('local_ltiprovider')) {
        foreach ($tools as $tool) {
            local_ltiprovider_check_missing_course($tool);
        }
    }
    // Grades service.
    if ($tools = $DB->get_records_select('local_ltiprovider', 'disabled = ? AND sendgrades = ?', array(0, 1))) {
        foreach ($tools as $tool) {
            if ($tool->lastsync + $synctime < $timenow) {
                mtrace(" Starting sync tool for grades id {$tool->id} course id {$tool->courseid}");
                if ($tool->requirecompletion) {
                    mtrace("  Grades require activity or course completion");
                }
                $user_count = 0;
                $send_count = 0;
                $error_count = 0;
                $completion = new completion_info(get_course($tool->courseid));
                if ($users = $DB->get_records('local_ltiprovider_user', array('toolid' => $tool->id))) {
                    foreach ($users as $user) {
                        $user_count = $user_count + 1;
                        // This can happen is the sync process has an unexpected error
                        if (strlen($user->serviceurl) < 1) {
                            mtrace("   Empty serviceurl");
                            continue;
                        }
                        if (strlen($user->sourceid) < 1) {
                            mtrace("   Empty sourceid");
                            continue;
                        }
                        if ($user->lastsync > $tool->lastsync) {
                            mtrace("   Skipping user {$user->id} due to recent sync");
                            continue;
                        }
                        $grade = false;
                        if ($context = $DB->get_record('context', array('id' => $tool->contextid))) {
                            if ($context->contextlevel == CONTEXT_COURSE) {
                                if ($tool->requirecompletion and !$completion->is_course_complete($user->userid)) {
                                    mtrace("   Skipping user {$user->userid} since he didn't complete the course");
                                    continue;
                                }
                                if ($grade = grade_get_course_grade($user->userid, $tool->courseid)) {
                                    $grademax = floatval($grade->item->grademax);
                                    $grade = $grade->grade;
                                }
                            } else {
                                if ($context->contextlevel == CONTEXT_MODULE) {
                                    $cm = get_coursemodule_from_id(false, $context->instanceid, 0, false, MUST_EXIST);
                                    if ($tool->requirecompletion) {
                                        $data = $completion->get_data($cm, false, $user->userid);
                                        if ($data->completionstate != COMPLETION_COMPLETE_PASS and $data->completionstate != COMPLETION_COMPLETE) {
                                            mtrace("   Skipping user {$user->userid} since he didn't complete the activity");
                                            continue;
                                        }
                                    }
                                    $grades = grade_get_grades($cm->course, 'mod', $cm->modname, $cm->instance, $user->userid);
                                    if (empty($grades->items[0]->grades)) {
                                        $grade = false;
                                    } else {
                                        $grade = reset($grades->items[0]->grades);
                                        if (!empty($grade->item)) {
                                            $grademax = floatval($grade->item->grademax);
                                        } else {
                                            $grademax = floatval($grades->items[0]->grademax);
                                        }
                                        $grade = $grade->grade;
                                    }
                                }
                            }
                            if ($grade === false || $grade === NULL || strlen($grade) < 1) {
                                mtrace("   Invalid grade {$grade}");
                                continue;
                            }
                            // No need to be dividing by zero
                            if ($grademax == 0.0) {
                                $grademax = 100.0;
                            }
                            // TODO: Make lastgrade should be float or string - but it is integer so we truncate
                            // TODO: Then remove those intval() calls
                            // Don't double send
                            if (intval($grade) == $user->lastgrade) {
                                mtrace("   Skipping, last grade send is equal to current grade");
                                continue;
                            }
                            // We sync with the external system only when the new grade differs with the previous one
                            // TODO - Global setting for check this
                            if ($grade >= 0 and $grade <= $grademax) {
                                $float_grade = $grade / $grademax;
                                $body = local_ltiprovider_create_service_body($user->sourceid, $float_grade);
                                try {
                                    $response = ltiprovider\sendOAuthBodyPOST('POST', $user->serviceurl, $user->consumerkey, $user->consumersecret, 'application/xml', $body);
                                } catch (Exception $e) {
                                    mtrace(" " . $e->getMessage());
                                    $error_count = $error_count + 1;
                                    continue;
                                }
                                // TODO - Check for errors in $retval in a correct way (parsing xml)
                                if (strpos(strtolower($response), 'success') !== false) {
                                    $DB->set_field('local_ltiprovider_user', 'lastsync', $timenow, array('id' => $user->id));
                                    $DB->set_field('local_ltiprovider_user', 'lastgrade', intval($grade), array('id' => $user->id));
                                    mtrace(" User grade sent to remote system. userid: {$user->userid} grade: {$float_grade}");
                                    $send_count = $send_count + 1;
                                } else {
                                    mtrace(" User grade send failed. userid: {$user->userid} grade: {$float_grade}: " . $response);
                                    $error_count = $error_count + 1;
                                }
                            } else {
                                mtrace(" User grade for user {$user->userid} out of range: grade = " . $grade);
                                $error_count = $error_count + 1;
                            }
                        } else {
                            mtrace(" Invalid context: contextid = " . $tool->contextid);
                        }
                    }
                }
                mtrace(" Completed sync tool id {$tool->id} course id {$tool->courseid} users={$user_count} sent={$send_count} errors={$error_count}");
                $DB->set_field('local_ltiprovider', 'lastsync', $timenow, array('id' => $tool->id));
            }
        }
    }
    $timenow = time();
    // Automatic course restaurations.
    if ($croncourses = get_config('local_ltiprovider', 'croncourses')) {
        $croncourses = unserialize($croncourses);
        if (is_array($croncourses)) {
            mtrace('Starting restauration of pending courses');
            foreach ($croncourses as $key => $course) {
                mtrace('Starting restoration of ' . $key);
                // We limit the backups to 1 hour, then retry.
                if ($course->restorestart and $timenow < $course->restorestart + 3600) {
                    mtrace('Skipping restoration in process for: ' . $key);
                    continue;
                }
                $course->restorestart = time();
                $croncourses[$key] = $course;
                $croncoursessafe = serialize($croncourses);
                set_config('croncourses', $croncoursessafe, 'local_ltiprovider');
                if ($destinationcourse = $DB->get_record('course', array('id' => $course->destinationid))) {
                    // Duplicate course + users.
                    local_ltiprovider_duplicate_course($course->id, $destinationcourse, 1, $options = array(array('name' => 'users', 'value' => 1)), $course->userrestoringid, $course->context);
                    mtrace('Restoration for ' . $key . ' finished');
                } else {
                    mtrace('Restoration for ' . $key . ' finished (destination course not exists)');
                }
                unset($croncourses[$key]);
                $croncoursessafe = serialize($croncourses);
                set_config('croncourses', $croncoursessafe, 'local_ltiprovider');
            }
        }
    }
    // Membership service.
    $timenow = time();
    $userphotos = array();
    if ($tools = $DB->get_records('local_ltiprovider', array('disabled' => 0, 'syncmembers' => 1))) {
        mtrace('Starting sync of member using the memberships service');
        $consumers = array();
        foreach ($tools as $tool) {
            $lastsync = get_config('local_ltiprovider', 'membershipslastsync-' . $tool->id);
            if (!$lastsync) {
                $lastsync = 0;
            }
            if ($lastsync + $tool->syncperiod < $timenow) {
                mtrace('Starting sync of tool: ' . $tool->id);
                // We check for all the users, notice that users can access the same tool from different consumers.
                if ($users = $DB->get_records('local_ltiprovider_user', array('toolid' => $tool->id), 'lastaccess DESC')) {
                    $response = "";
                    foreach ($users as $user) {
                        if (!$user->membershipsurl or !$user->membershipsid) {
                            continue;
                        }
                        $consumer = md5($user->membershipsurl . ':' . $user->membershipsid . ':' . $user->consumerkey . ':' . $user->consumersecret);
                        if (in_array($consumer, $consumers)) {
                            // We had syncrhonized with this consumer yet.
                            continue;
                        }
                        $consumers[] = $consumer;
                        $params = array('lti_message_type' => 'basic-lis-readmembershipsforcontext', 'id' => $user->membershipsid, 'lti_version' => 'LTI-1p0');
                        mtrace('Calling memberships url: ' . $user->membershipsurl . ' with body: ' . json_encode($params));
                        try {
                            $response = ltiprovider\sendOAuthParamsPOST('POST', $user->membershipsurl, $user->consumerkey, $user->consumersecret, 'application/x-www-form-urlencoded', $params);
                        } catch (Exception $e) {
                            mtrace("Exception: " . $e->getMessage());
                            $response = false;
                        }
                        if ($response) {
                            $data = new SimpleXMLElement($response);
                            if (!empty($data->statusinfo)) {
                                if (strpos(strtolower($data->statusinfo->codemajor), 'success') !== false) {
                                    $members = $data->memberships->member;
                                    mtrace(count($members) . ' members received');
                                    $currentusers = array();
                                    foreach ($members as $member) {
                                        $username = local_ltiprovider_create_username($user->consumerkey, $member->user_id);
                                        $userobj = $DB->get_record('user', array('username' => $username));
                                        if (!$userobj) {
                                            // Old format.
                                            $oldusername = '******' . md5($user->consumerkey . ':' . $member->user_id);
                                            $userobj = $DB->get_record('user', array('username' => $oldusername));
                                            if ($userobj) {
                                                $DB->set_field('user', 'username', $username, array('id' => $userobj->id));
                                            }
                                            $userobj = $DB->get_record('user', array('username' => $username));
                                        }
                                        if ($userobj) {
                                            $currentusers[] = $userobj->id;
                                            $userobj->firstname = clean_param($member->person_name_given, PARAM_TEXT);
                                            $userobj->lastname = clean_param($member->person_name_family, PARAM_TEXT);
                                            $userobj->email = clean_param($member->person_contact_email_primary, PARAM_EMAIL);
                                            $userobj->timemodified = time();
                                            $DB->update_record('user', $userobj);
                                            $userphotos[$userobj->id] = $member->user_image;
                                            // Trigger event.
                                            $event = \core\event\user_updated::create(array('objectid' => $userobj->id, 'relateduserid' => $userobj->id, 'context' => context_user::instance($userobj->id)));
                                            $event->trigger();
                                        } else {
                                            // New members.
                                            if ($tool->syncmode == 1 or $tool->syncmode == 2) {
                                                // We have to enrol new members so we have to create it.
                                                $userobj = new stdClass();
                                                // clean_param , email username text
                                                $auth = get_config('local_ltiprovider', 'defaultauthmethod');
                                                if ($auth) {
                                                    $userobj->auth = $auth;
                                                } else {
                                                    $userobj->auth = 'nologin';
                                                }
                                                $username = local_ltiprovider_create_username($user->consumerkey, $member->user_id);
                                                $userobj->username = $username;
                                                $userobj->password = md5(uniqid(rand(), 1));
                                                $userobj->firstname = clean_param($member->person_name_given, PARAM_TEXT);
                                                $userobj->lastname = clean_param($member->person_name_family, PARAM_TEXT);
                                                $userobj->email = clean_param($member->person_contact_email_primary, PARAM_EMAIL);
                                                $userobj->city = $tool->city;
                                                $userobj->country = $tool->country;
                                                $userobj->institution = $tool->institution;
                                                $userobj->timezone = $tool->timezone;
                                                $userobj->maildisplay = $tool->maildisplay;
                                                $userobj->mnethostid = $CFG->mnet_localhost_id;
                                                $userobj->confirmed = 1;
                                                $userobj->lang = $tool->lang;
                                                $userobj->timecreated = time();
                                                if (!$userobj->lang) {
                                                    // TODO: This should be changed for detect the course lang
                                                    $userobj->lang = current_language();
                                                }
                                                $userobj->id = $DB->insert_record('user', $userobj);
                                                // Reload full user
                                                $userobj = $DB->get_record('user', array('id' => $userobj->id));
                                                $userphotos[$userobj->id] = $member->user_image;
                                                // Trigger event.
                                                $event = \core\event\user_created::create(array('objectid' => $userobj->id, 'relateduserid' => $userobj->id, 'context' => context_user::instance($userobj->id)));
                                                $event->trigger();
                                                $currentusers[] = $userobj->id;
                                            }
                                        }
                                        // 1 -> Enrol and unenrol, 2 -> enrol
                                        if ($tool->syncmode == 1 or $tool->syncmode == 2) {
                                            // Enroll the user in the course. We don't know if it was previously unenrolled.
                                            $roles = explode(',', strtolower($member->roles));
                                            local_ltiprovider_enrol_user($tool, $userobj, $roles, true);
                                        }
                                    }
                                    // Now we check if we have to unenrol users for keep both systems sync.
                                    if ($tool->syncmode == 1 or $tool->syncmode == 3) {
                                        // Unenrol users also.
                                        $context = context_course::instance($tool->courseid);
                                        $eusers = get_enrolled_users($context);
                                        foreach ($eusers as $euser) {
                                            if (!in_array($euser->id, $currentusers)) {
                                                local_ltiprovider_unenrol_user($tool, $euser);
                                            }
                                        }
                                    }
                                } else {
                                    mtrace('Error recived from the remote system: ' . $data->statusinfo->codemajor . ' ' . $data->statusinfo->severity . ' ' . $data->statusinfo->codeminor);
                                }
                            } else {
                                mtrace('Error parsing the XML received' . substr($response, 0, 125) . '... (Displaying only 125 chars)');
                            }
                        } else {
                            mtrace('No response received from ' . $user->membershipsurl);
                        }
                    }
                }
                set_config('membershipslastsync-' . $tool->id, $timenow, 'local_ltiprovider');
            } else {
                $last = format_time(time() - $lastsync);
                mtrace("Tool {$tool->id} synchronized {$last} ago");
            }
            mtrace('Finished sync of member using the memberships service');
        }
    }
    // Sync of user photos.
    mtrace("Sync user profile images");
    $counter = 0;
    if ($userphotos) {
        foreach ($userphotos as $userid => $url) {
            if ($url) {
                $result = local_ltiprovider_update_user_profile_image($userid, $url);
                if ($result === true) {
                    $counter++;
                    mtrace("Profile image succesfully downloaded and created from {$url}");
                } else {
                    mtrace($result);
                }
            }
        }
    }
    mtrace("{$counter} profile images updated");
}
Exemplo n.º 2
0
     require_once "{$CFG->dirroot}/course/lib.php";
     $newcourse = new stdClass();
     $newcourse->fullname = local_ltiprovider_get_new_course_info('fullname', $context);
     $newcourse->shortname = local_ltiprovider_get_new_course_info('shortname', $context);
     $newcourse->idnumber = local_ltiprovider_get_new_course_info('idnumber', $context);
     $categories = $DB->get_records('course_categories', null, '', 'id', 0, 1);
     $category = array_shift($categories);
     $newcourse->category = $category->id;
     $course = create_course($newcourse);
     $coursecontext = context_course::instance($course->id);
     // Create the tool that provide the full course.
     $tool = local_ltiprovider_create_tool($course->id, $coursecontext->id, $context);
     $username = local_ltiprovider_create_username($context->info['oauth_consumer_key'], $context->info['user_id']);
     $userrestoringid = $DB->get_field('user', 'id', array('username' => $username));
     // Duplicate course + users.
     $course = local_ltiprovider_duplicate_course($tplcourse->id, $course, 1, $options = array(array('name' => 'users', 'value' => 1)), $userrestoringid, $context);
     echo json_encode($course);
 } else {
     if ($service == 'duplicate_resource') {
         $idnumber = $context->info['custom_resource_link_copy_id'];
         $resource_link_id = $context->info['resource_link_id'];
         if (!$tool) {
             print_error('missingrequiredtool', 'local_ltiprovider');
         }
         if (!($context = $DB->get_record('context', array('id' => $tool->contextid)))) {
             print_error("invalidcontext");
         }
         if ($context->contextlevel != CONTEXT_COURSE) {
             print_error('invalidtypetool', 'local_ltiprovider');
         }
         if (!($cm = $DB->get_record('course_modules', array('idnumber' => $idnumber), '*', IGNORE_MULTIPLE))) {
Exemplo n.º 3
0
/**
 * Cron function for sync grades
 * @return void
 */
function local_ltiprovider_cron()
{
    global $DB, $CFG;
    require_once $CFG->dirroot . "/local/ltiprovider/locallib.php";
    require_once $CFG->dirroot . "/local/ltiprovider/ims-blti/OAuth.php";
    require_once $CFG->dirroot . "/local/ltiprovider/ims-blti/OAuthBody.php";
    require_once $CFG->libdir . '/gradelib.php';
    require_once $CFG->dirroot . '/grade/querylib.php';
    // TODO - Add a global setting for this
    $synctime = 60 * 60;
    // Every 1 hour grades are sync
    $timenow = time();
    mtrace('Running cron for ltiprovider');
    mtrace('Deleting LTI tools assigned to deleted courses');
    if ($tools = $DB->get_records('local_ltiprovider')) {
        foreach ($tools as $tool) {
            local_ltiprovider_check_missing_course($tool);
        }
    }
    // Grades service.
    if ($tools = $DB->get_records_select('local_ltiprovider', 'disabled = ? AND sendgrades = ?', array(0, 1))) {
        foreach ($tools as $tool) {
            if ($tool->lastsync + $synctime < $timenow) {
                mtrace(" Starting sync tool id {$tool->id} course id {$tool->courseid}");
                $user_count = 0;
                $send_count = 0;
                $error_count = 0;
                if ($users = $DB->get_records('local_ltiprovider_user', array('toolid' => $tool->id))) {
                    foreach ($users as $user) {
                        $user_count = $user_count + 1;
                        // This can happen is the sync process has an unexpected error
                        if (strlen($user->serviceurl) < 1) {
                            continue;
                        }
                        if (strlen($user->sourceid) < 1) {
                            continue;
                        }
                        if ($user->lastsync > $tool->lastsync) {
                            mtrace("Skipping user {$user->id}");
                            continue;
                        } else {
                            list($result, $message) = local_ltiprovider_send_grade($tool, $user, $timenow);
                            if ($result === true) {
                                $send_count++;
                            } else {
                                $error_count++;
                            }
                        }
                    }
                }
            }
        }
    }
    $timenow = time();
    // Automatic course restaurations.
    if ($croncourses = get_config('local_ltiprovider', 'croncourses')) {
        $croncourses = unserialize($croncourses);
        if (is_array($croncourses)) {
            mtrace('Starting restauration of pending courses');
            foreach ($croncourses as $key => $course) {
                mtrace('Starting restoration of ' . $key);
                // We limit the backups to 1 hour, then retry.
                if ($course->restorestart and $timenow < $course->restorestart + 3600) {
                    mtrace('Skipping restoration in process for: ' . $key);
                    continue;
                }
                $course->restorestart = time();
                $croncourses[$key] = $course;
                $croncoursessafe = serialize($croncourses);
                set_config('croncourses', $croncoursessafe, 'local_ltiprovider');
                if ($destinationcourse = $DB->get_record('course', array('id' => $course->destinationid))) {
                    // Duplicate course + users.
                    local_ltiprovider_duplicate_course($course->id, $destinationcourse, 1, $options = array(array('name' => 'users', 'value' => 1)), $course->userrestoringid, $course->context);
                    mtrace('Restoration for ' . $key . ' finished');
                } else {
                    mtrace('Restoration for ' . $key . ' finished (destination course not exists)');
                }
                unset($croncourses[$key]);
                $croncoursessafe = serialize($croncourses);
                set_config('croncourses', $croncoursessafe, 'local_ltiprovider');
            }
        }
    }
    // Membership service.
    $timenow = time();
    $userphotos = array();
    if ($tools = $DB->get_records('local_ltiprovider', array('disabled' => 0, 'syncmembers' => 1))) {
        mtrace('Starting sync of member using the memberships service');
        $consumers = array();
        foreach ($tools as $tool) {
            $lastsync = get_config('local_ltiprovider', 'membershipslastsync-' . $tool->id);
            if (!$lastsync) {
                $lastsync = 0;
            }
            if ($lastsync + $tool->syncperiod < $timenow) {
                mtrace('Starting sync of tool: ' . $tool->id);
                // We check for all the users, notice that users can access the same tool from different consumers.
                if ($users = $DB->get_records('local_ltiprovider_user', array('toolid' => $tool->id), 'lastaccess DESC')) {
                    $response = "";
                    foreach ($users as $user) {
                        if (!$user->membershipsurl or !$user->membershipsid) {
                            continue;
                        }
                        $consumer = md5($user->membershipsurl . ':' . $user->membershipsid . ':' . $user->consumerkey . ':' . $user->consumersecret);
                        if (in_array($consumer, $consumers)) {
                            // We had syncrhonized with this consumer yet.
                            continue;
                        }
                        $consumers[] = $consumer;
                        $params = array('lti_message_type' => 'basic-lis-readmembershipsforcontext', 'id' => $user->membershipsid, 'lti_version' => 'LTI-1p0');
                        mtrace('Calling memberships url: ' . $user->membershipsurl . ' with body: ' . json_encode($params));
                        try {
                            $response = ltiprovider\sendOAuthParamsPOST('POST', $user->membershipsurl, $user->consumerkey, $user->consumersecret, 'application/x-www-form-urlencoded', $params);
                        } catch (Exception $e) {
                            mtrace("Exception: " . $e->getMessage());
                            $response = false;
                        }
                        if ($response) {
                            $data = new SimpleXMLElement($response);
                            if (!empty($data->statusinfo)) {
                                if (strpos(strtolower($data->statusinfo->codemajor), 'success') !== false) {
                                    $members = $data->memberships->member;
                                    mtrace(count($members) . ' members received');
                                    $currentusers = array();
                                    foreach ($members as $member) {
                                        $username = local_ltiprovider_create_username($user->consumerkey, $member->user_id);
                                        $userobj = $DB->get_record('user', array('username' => $username));
                                        if (!$userobj) {
                                            // Old format.
                                            $oldusername = '******' . md5($user->consumerkey . ':' . $member->user_id);
                                            $userobj = $DB->get_record('user', array('username' => $oldusername));
                                            if ($userobj) {
                                                $DB->set_field('user', 'username', $username, array('id' => $userobj->id));
                                            }
                                            $userobj = $DB->get_record('user', array('username' => $username));
                                        }
                                        if ($userobj) {
                                            $currentusers[] = $userobj->id;
                                            $userobj->firstname = clean_param($member->person_name_given, PARAM_TEXT);
                                            $userobj->lastname = clean_param($member->person_name_family, PARAM_TEXT);
                                            $userobj->email = clean_param($member->person_contact_email_primary, PARAM_EMAIL);
                                            $userobj->timemodified = time();
                                            $DB->update_record('user', $userobj);
                                            $userphotos[$userobj->id] = $member->user_image;
                                            events_trigger('user_updated', $userobj);
                                        } else {
                                            // New members.
                                            if ($tool->syncmode == 1 or $tool->syncmode == 2) {
                                                // We have to enrol new members so we have to create it.
                                                $userobj = new stdClass();
                                                // clean_param , email username text
                                                $auth = get_config('local_ltiprovider', 'defaultauthmethod');
                                                if ($auth) {
                                                    $userobj->auth = $auth;
                                                } else {
                                                    $userobj->auth = 'nologin';
                                                }
                                                $username = local_ltiprovider_create_username($user->consumerkey, $member->user_id);
                                                $userobj->username = $username;
                                                $userobj->password = md5(uniqid(rand(), 1));
                                                $userobj->firstname = clean_param($member->person_name_given, PARAM_TEXT);
                                                $userobj->lastname = clean_param($member->person_name_family, PARAM_TEXT);
                                                $userobj->email = clean_param($member->person_contact_email_primary, PARAM_EMAIL);
                                                $userobj->city = $tool->city;
                                                $userobj->country = $tool->country;
                                                $userobj->institution = $tool->institution;
                                                $userobj->timezone = $tool->timezone;
                                                $userobj->maildisplay = $tool->maildisplay;
                                                $userobj->mnethostid = $CFG->mnet_localhost_id;
                                                $userobj->confirmed = 1;
                                                $userobj->lang = $tool->lang;
                                                $userobj->timecreated = time();
                                                if (!$userobj->lang) {
                                                    // TODO: This should be changed for detect the course lang
                                                    $userobj->lang = current_language();
                                                }
                                                $userobj->id = $DB->insert_record('user', $userobj);
                                                // Reload full user
                                                $userobj = $DB->get_record('user', array('id' => $userobj->id));
                                                $userphotos[$userobj->id] = $member->user_image;
                                                events_trigger('user_created', $userobj);
                                                $currentusers[] = $userobj->id;
                                            }
                                        }
                                        // 1 -> Enrol and unenrol, 2 -> enrol
                                        if ($tool->syncmode == 1 or $tool->syncmode == 2) {
                                            // Enroll the user in the course. We don't know if it was previously unenrolled.
                                            $roles = explode(',', strtolower($member->roles));
                                            local_ltiprovider_enrol_user($tool, $userobj, $roles, true);
                                        }
                                    }
                                    // Now we check if we have to unenrol users for keep both systems sync.
                                    if ($tool->syncmode == 1 or $tool->syncmode == 3) {
                                        // Unenrol users also.
                                        $context = context_course::instance($tool->courseid);
                                        $eusers = get_enrolled_users($context);
                                        foreach ($eusers as $euser) {
                                            if (!in_array($euser->id, $currentusers)) {
                                                local_ltiprovider_unenrol_user($tool, $euser);
                                            }
                                        }
                                    }
                                } else {
                                    mtrace('Error recived from the remote system: ' . $data->statusinfo->codemajor . ' ' . $data->statusinfo->severity . ' ' . $data->statusinfo->codeminor);
                                }
                            } else {
                                mtrace('Error parsing the XML received' . substr($response, 0, 125) . '... (Displaying only 125 chars)');
                            }
                        } else {
                            mtrace('No response received from ' . $user->membershipsurl);
                        }
                    }
                }
                set_config('membershipslastsync-' . $tool->id, $timenow, 'local_ltiprovider');
            } else {
                $last = format_time(time() - $lastsync);
                mtrace("Tool {$tool->id} synchronized {$last} ago");
            }
            mtrace('Finished sync of member using the memberships service');
        }
    }
    // Sync of user photos.
    mtrace("Sync user profile images");
    $counter = 0;
    if ($userphotos) {
        foreach ($userphotos as $userid => $url) {
            if ($url) {
                $result = local_ltiprovider_update_user_profile_image($userid, $url);
                if ($result === true) {
                    $counter++;
                    mtrace("Profile image succesfully downloaded and created from {$url}");
                } else {
                    mtrace($result);
                }
            }
        }
    }
    mtrace("{$counter} profile images updated");
}