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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Generates an XML IMS Cartridge with the details for the given tool
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*
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* @package enrol_lti
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* @copyright 2016 John Okely <john@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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require_once(dirname(__FILE__) . '/../../config.php');
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require_once($CFG->dirroot . '/lib/weblib.php');
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$toolid = null;
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$token = null;
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$filearguments = get_file_argument();
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$arguments = explode('/', trim($filearguments, '/'));
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if (count($arguments) >= 2) { // Can put cartridge.xml at the end, or anything really.
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list($toolid, $token) = $arguments;
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}
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$toolid = optional_param('id', $toolid, PARAM_INT);
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$token = optional_param('token', $token, PARAM_ALPHANUM);
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// Only show the cartridge if the token parameter is correct.
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// If we do not compare with a shared secret, someone could very easily
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// guess an id for the enrolment.
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if (!\enrol_lti\helper::verify_cartridge_token($toolid, $token)) {
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throw new \moodle_exception('incorrecttoken', 'enrol_lti');
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}
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$tool = \enrol_lti\helper::get_lti_tool($toolid);
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if (!is_enabled_auth('lti')) {
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throw new \moodle_exception('pluginnotenabled', 'auth', '', get_string('pluginname', 'auth_lti'));
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} else if (!enrol_is_enabled('lti')) {
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throw new \moodle_exception('enrolisdisabled', 'enrol_lti');
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} else if ($tool->status != ENROL_INSTANCE_ENABLED) {
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throw new \moodle_exception('enrolisdisabled', 'enrol_lti');
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} else {
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header('Content-Type: text/xml; charset=utf-8');
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echo \enrol_lti\helper::create_cartridge($toolid);
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}
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