/enrol/lti/lib.php
PHP | 417 lines | 212 code | 67 blank | 138 comment | 13 complexity | 6ab80b5e49d057d273c8297946af9e27 MD5 | raw file
Possible License(s): MIT, AGPL-3.0, MPL-2.0-no-copyleft-exception, LGPL-3.0, GPL-3.0, Apache-2.0, LGPL-2.1, BSD-3-Clause
- <?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/>.
- /**
- * LTI enrolment plugin main library file.
- *
- * @package enrol_lti
- * @copyright 2016 Mark Nelson <markn@moodle.com>
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- use enrol_lti\data_connector;
- use IMSGlobal\LTI\ToolProvider\ToolConsumer;
- defined('MOODLE_INTERNAL') || die();
- /**
- * LTI enrolment plugin class.
- *
- * @package enrol_lti
- * @copyright 2016 Mark Nelson <markn@moodle.com>
- * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
- */
- class enrol_lti_plugin extends enrol_plugin {
- /**
- * Return true if we can add a new instance to this course.
- *
- * @param int $courseid
- * @return boolean
- */
- public function can_add_instance($courseid) {
- $context = context_course::instance($courseid, MUST_EXIST);
- return has_capability('moodle/course:enrolconfig', $context) && has_capability('enrol/lti:config', $context);
- }
- /**
- * Is it possible to delete enrol instance via standard UI?
- *
- * @param object $instance
- * @return bool
- */
- public function can_delete_instance($instance) {
- $context = context_course::instance($instance->courseid);
- return has_capability('enrol/lti:config', $context);
- }
- /**
- * Is it possible to hide/show enrol instance via standard UI?
- *
- * @param stdClass $instance
- * @return bool
- */
- public function can_hide_show_instance($instance) {
- $context = context_course::instance($instance->courseid);
- return has_capability('enrol/lti:config', $context);
- }
- /**
- * Returns true if it's possible to unenrol users.
- *
- * @param stdClass $instance course enrol instance
- * @return bool
- */
- public function allow_unenrol(stdClass $instance) {
- return true;
- }
- /**
- * We are a good plugin and don't invent our own UI/validation code path.
- *
- * @return boolean
- */
- public function use_standard_editing_ui() {
- return true;
- }
- /**
- * Add new instance of enrol plugin.
- *
- * @param object $course
- * @param array $fields instance fields
- * @return int id of new instance, null if can not be created
- */
- public function add_instance($course, array $fields = null) {
- global $DB;
- $instanceid = parent::add_instance($course, $fields);
- // Add additional data to our table.
- $data = new stdClass();
- $data->enrolid = $instanceid;
- $data->timecreated = time();
- $data->timemodified = $data->timecreated;
- foreach ($fields as $field => $value) {
- $data->$field = $value;
- }
- $DB->insert_record('enrol_lti_tools', $data);
- return $instanceid;
- }
- /**
- * Update instance of enrol plugin.
- *
- * @param stdClass $instance
- * @param stdClass $data modified instance fields
- * @return boolean
- */
- public function update_instance($instance, $data) {
- global $DB;
- parent::update_instance($instance, $data);
- // Remove the fields we don't want to override.
- unset($data->id);
- unset($data->timecreated);
- unset($data->timemodified);
- // Convert to an array we can loop over.
- $fields = (array) $data;
- // Update the data in our table.
- $tool = new stdClass();
- $tool->id = $data->toolid;
- $tool->timemodified = time();
- foreach ($fields as $field => $value) {
- $tool->$field = $value;
- }
- return $DB->update_record('enrol_lti_tools', $tool);
- }
- /**
- * Delete plugin specific information.
- *
- * @param stdClass $instance
- * @return void
- */
- public function delete_instance($instance) {
- global $DB;
- // Get the tool associated with this instance.
- $tool = $DB->get_record('enrol_lti_tools', array('enrolid' => $instance->id), 'id', MUST_EXIST);
- // Delete any users associated with this tool.
- $DB->delete_records('enrol_lti_users', array('toolid' => $tool->id));
- // Get tool and consumer mappings.
- $rsmapping = $DB->get_recordset('enrol_lti_tool_consumer_map', array('toolid' => $tool->id));
- // Delete consumers that are linked to this tool and their related data.
- $dataconnector = new data_connector();
- foreach ($rsmapping as $mapping) {
- $consumer = new ToolConsumer(null, $dataconnector);
- $consumer->setRecordId($mapping->consumerid);
- $dataconnector->deleteToolConsumer($consumer);
- }
- $rsmapping->close();
- // Delete mapping records.
- $DB->delete_records('enrol_lti_tool_consumer_map', array('toolid' => $tool->id));
- // Delete the lti tool record.
- $DB->delete_records('enrol_lti_tools', array('id' => $tool->id));
- // Time for the parent to do it's thang, yeow.
- parent::delete_instance($instance);
- }
- /**
- * Handles un-enrolling a user.
- *
- * @param stdClass $instance
- * @param int $userid
- * @return void
- */
- public function unenrol_user(stdClass $instance, $userid) {
- global $DB;
- // Get the tool associated with this instance. Note - it may not exist if we have deleted
- // the tool. This is fine because we have already cleaned the 'enrol_lti_users' table.
- if ($tool = $DB->get_record('enrol_lti_tools', array('enrolid' => $instance->id), 'id')) {
- // Need to remove the user from the users table.
- $DB->delete_records('enrol_lti_users', array('userid' => $userid, 'toolid' => $tool->id));
- }
- parent::unenrol_user($instance, $userid);
- }
- /**
- * Add elements to the edit instance form.
- *
- * @param stdClass $instance
- * @param MoodleQuickForm $mform
- * @param context $context
- * @return bool
- */
- public function edit_instance_form($instance, MoodleQuickForm $mform, $context) {
- global $DB;
- $nameattribs = array('size' => '20', 'maxlength' => '255');
- $mform->addElement('text', 'name', get_string('custominstancename', 'enrol'), $nameattribs);
- $mform->setType('name', PARAM_TEXT);
- $mform->addRule('name', get_string('maximumchars', '', 255), 'maxlength', 255, 'server');
- $tools = array();
- $tools[$context->id] = get_string('course');
- $modinfo = get_fast_modinfo($instance->courseid);
- $mods = $modinfo->get_cms();
- foreach ($mods as $mod) {
- $tools[$mod->context->id] = format_string($mod->name);
- }
- $mform->addElement('select', 'contextid', get_string('tooltobeprovided', 'enrol_lti'), $tools);
- $mform->setDefault('contextid', $context->id);
- $mform->addElement('duration', 'enrolperiod', get_string('enrolperiod', 'enrol_lti'),
- array('optional' => true, 'defaultunit' => DAYSECS));
- $mform->setDefault('enrolperiod', 0);
- $mform->addHelpButton('enrolperiod', 'enrolperiod', 'enrol_lti');
- $mform->addElement('date_time_selector', 'enrolstartdate', get_string('enrolstartdate', 'enrol_lti'),
- array('optional' => true));
- $mform->setDefault('enrolstartdate', 0);
- $mform->addHelpButton('enrolstartdate', 'enrolstartdate', 'enrol_lti');
- $mform->addElement('date_time_selector', 'enrolenddate', get_string('enrolenddate', 'enrol_lti'),
- array('optional' => true));
- $mform->setDefault('enrolenddate', 0);
- $mform->addHelpButton('enrolenddate', 'enrolenddate', 'enrol_lti');
- $mform->addElement('text', 'maxenrolled', get_string('maxenrolled', 'enrol_lti'));
- $mform->setDefault('maxenrolled', 0);
- $mform->addHelpButton('maxenrolled', 'maxenrolled', 'enrol_lti');
- $mform->setType('maxenrolled', PARAM_INT);
- $assignableroles = get_assignable_roles($context);
- $mform->addElement('select', 'roleinstructor', get_string('roleinstructor', 'enrol_lti'), $assignableroles);
- $mform->setDefault('roleinstructor', '3');
- $mform->addHelpButton('roleinstructor', 'roleinstructor', 'enrol_lti');
- $mform->addElement('select', 'rolelearner', get_string('rolelearner', 'enrol_lti'), $assignableroles);
- $mform->setDefault('rolelearner', '5');
- $mform->addHelpButton('rolelearner', 'rolelearner', 'enrol_lti');
- $mform->addElement('header', 'remotesystem', get_string('remotesystem', 'enrol_lti'));
- $mform->addElement('text', 'secret', get_string('secret', 'enrol_lti'), 'maxlength="64" size="25"');
- $mform->setType('secret', PARAM_ALPHANUM);
- $mform->setDefault('secret', random_string(32));
- $mform->addHelpButton('secret', 'secret', 'enrol_lti');
- $mform->addRule('secret', get_string('required'), 'required');
- $mform->addElement('selectyesno', 'gradesync', get_string('gradesync', 'enrol_lti'));
- $mform->setDefault('gradesync', 1);
- $mform->addHelpButton('gradesync', 'gradesync', 'enrol_lti');
- $mform->addElement('selectyesno', 'gradesynccompletion', get_string('requirecompletion', 'enrol_lti'));
- $mform->setDefault('gradesynccompletion', 0);
- $mform->disabledIf('gradesynccompletion', 'gradesync', 0);
- $mform->addElement('selectyesno', 'membersync', get_string('membersync', 'enrol_lti'));
- $mform->setDefault('membersync', 1);
- $mform->addHelpButton('membersync', 'membersync', 'enrol_lti');
- $options = array();
- $options[\enrol_lti\helper::MEMBER_SYNC_ENROL_AND_UNENROL] = get_string('membersyncmodeenrolandunenrol', 'enrol_lti');
- $options[\enrol_lti\helper::MEMBER_SYNC_ENROL_NEW] = get_string('membersyncmodeenrolnew', 'enrol_lti');
- $options[\enrol_lti\helper::MEMBER_SYNC_UNENROL_MISSING] = get_string('membersyncmodeunenrolmissing', 'enrol_lti');
- $mform->addElement('select', 'membersyncmode', get_string('membersyncmode', 'enrol_lti'), $options);
- $mform->setDefault('membersyncmode', \enrol_lti\helper::MEMBER_SYNC_ENROL_AND_UNENROL);
- $mform->addHelpButton('membersyncmode', 'membersyncmode', 'enrol_lti');
- $mform->disabledIf('membersyncmode', 'membersync', 0);
- $mform->addElement('header', 'defaultheader', get_string('userdefaultvalues', 'enrol_lti'));
- $emaildisplay = get_config('enrol_lti', 'emaildisplay');
- $choices = array(
- 0 => get_string('emaildisplayno'),
- 1 => get_string('emaildisplayyes'),
- 2 => get_string('emaildisplaycourse')
- );
- $mform->addElement('select', 'maildisplay', get_string('emaildisplay'), $choices);
- $mform->setDefault('maildisplay', $emaildisplay);
- $mform->addHelpButton('maildisplay', 'emaildisplay');
- $city = get_config('enrol_lti', 'city');
- $mform->addElement('text', 'city', get_string('city'), 'maxlength="100" size="25"');
- $mform->setType('city', PARAM_TEXT);
- $mform->setDefault('city', $city);
- $country = get_config('enrol_lti', 'country');
- $countries = array('' => get_string('selectacountry') . '...') + get_string_manager()->get_list_of_countries();
- $mform->addElement('select', 'country', get_string('selectacountry'), $countries);
- $mform->setDefault('country', $country);
- $mform->setAdvanced('country');
- $timezone = get_config('enrol_lti', 'timezone');
- $choices = core_date::get_list_of_timezones(null, true);
- $mform->addElement('select', 'timezone', get_string('timezone'), $choices);
- $mform->setDefault('timezone', $timezone);
- $mform->setAdvanced('timezone');
- $lang = get_config('enrol_lti', 'lang');
- $mform->addElement('select', 'lang', get_string('preferredlanguage'), get_string_manager()->get_list_of_translations());
- $mform->setDefault('lang', $lang);
- $mform->setAdvanced('lang');
- $institution = get_config('enrol_lti', 'institution');
- $mform->addElement('text', 'institution', get_string('institution'), 'maxlength="40" size="25"');
- $mform->setType('institution', core_user::get_property_type('institution'));
- $mform->setDefault('institution', $institution);
- $mform->setAdvanced('institution');
- // Check if we are editing an instance.
- if (!empty($instance->id)) {
- // Get the details from the enrol_lti_tools table.
- $ltitool = $DB->get_record('enrol_lti_tools', array('enrolid' => $instance->id), '*', MUST_EXIST);
- $mform->addElement('hidden', 'toolid');
- $mform->setType('toolid', PARAM_INT);
- $mform->setConstant('toolid', $ltitool->id);
- $mform->setDefaults((array) $ltitool);
- }
- }
- /**
- * Perform custom validation of the data used to edit the instance.
- *
- * @param array $data array of ("fieldname"=>value) of submitted data
- * @param array $files array of uploaded files "element_name"=>tmp_file_path
- * @param object $instance The instance loaded from the DB
- * @param context $context The context of the instance we are editing
- * @return array of "element_name"=>"error_description" if there are errors,
- * or an empty array if everything is OK.
- * @return void
- */
- public function edit_instance_validation($data, $files, $instance, $context) {
- global $COURSE, $DB;
- $errors = array();
- if (!empty($data['enrolenddate']) && $data['enrolenddate'] < $data['enrolstartdate']) {
- $errors['enrolenddate'] = get_string('enrolenddateerror', 'enrol_lti');
- }
- if (!empty($data['requirecompletion'])) {
- $completion = new completion_info($COURSE);
- $moodlecontext = $DB->get_record('context', array('id' => $data['contextid']));
- if ($moodlecontext->contextlevel == CONTEXT_MODULE) {
- $cm = get_coursemodule_from_id(false, $moodlecontext->instanceid, 0, false, MUST_EXIST);
- } else {
- $cm = null;
- }
- if (!$completion->is_enabled($cm)) {
- $errors['requirecompletion'] = get_string('errorcompletionenabled', 'enrol_lti');
- }
- }
- return $errors;
- }
- /**
- * Restore instance and map settings.
- *
- * @param restore_enrolments_structure_step $step
- * @param stdClass $data
- * @param stdClass $course
- * @param int $oldid
- */
- public function restore_instance(restore_enrolments_structure_step $step, stdClass $data, $course, $oldid) {
- // We want to call the parent because we do not want to add an enrol_lti_tools row
- // as that is done as part of the restore process.
- $instanceid = parent::add_instance($course, (array)$data);
- $step->set_mapping('enrol', $oldid, $instanceid);
- }
- }
- /**
- * Display the LTI link in the course administration menu.
- *
- * @param settings_navigation $navigation The settings navigation object
- * @param stdClass $course The course
- * @param stdclass $context Course context
- */
- function enrol_lti_extend_navigation_course($navigation, $course, $context) {
- // Check that the LTI plugin is enabled.
- if (enrol_is_enabled('lti')) {
- // Check that they can add an instance.
- $ltiplugin = enrol_get_plugin('lti');
- if ($ltiplugin->can_add_instance($course->id)) {
- $url = new moodle_url('/enrol/lti/index.php', array('courseid' => $course->id));
- $settingsnode = navigation_node::create(get_string('sharedexternaltools', 'enrol_lti'), $url,
- navigation_node::TYPE_SETTING, null, null, new pix_icon('i/settings', ''));
- $navigation->add_node($settingsnode);
- }
- }
- }