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If the enrolment instance (the 'published resource') has been upgraded from LTI 1.1/2.0 to LTI 1.3 (i.e. a new instance was not created), prevent legacy launches which may occur from old resource links. Only LTI Advantage launches should be permitted through the method.
102 lines
3.6 KiB
PHP
102 lines
3.6 KiB
PHP
<?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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* The main entry point for the external system.
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*
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* @package enrol_lti
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* @copyright 2016 Mark Nelson <markn@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(__DIR__ . '/../../config.php');
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$toolid = required_param('id', PARAM_INT);
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$PAGE->set_context(context_system::instance());
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$url = new moodle_url('/enrol/lti/tool.php');
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$PAGE->set_url($url);
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$PAGE->set_pagelayout('popup');
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$PAGE->set_title(get_string('opentool', 'enrol_lti'));
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// Get the tool.
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$tool = \enrol_lti\helper::get_lti_tool($toolid);
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// Check if the authentication plugin is disabled.
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if (!is_enabled_auth('lti')) {
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throw new \moodle_exception('pluginnotenabled', 'auth', '', get_string('pluginname', 'auth_lti'));
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exit();
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}
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// Check if the enrolment plugin is disabled.
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if (!enrol_is_enabled('lti')) {
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throw new \moodle_exception('enrolisdisabled', 'enrol_lti');
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exit();
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}
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// Check if the enrolment instance is disabled.
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if ($tool->status != ENROL_INSTANCE_ENABLED) {
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throw new \moodle_exception('enrolisdisabled', 'enrol_lti');
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exit();
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}
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// Check if the enrolment instance has been upgraded to a newer LTI version.
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if ($tool->ltiversion != 'LTI-1p0/LTI-2p0') {
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throw new \moodle_exception('enrolltiversionincorrect', 'enrol_lti');
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exit();
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}
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$consumerkey = required_param('oauth_consumer_key', PARAM_TEXT);
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$ltiversion = optional_param('lti_version', null, PARAM_TEXT);
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$messagetype = required_param('lti_message_type', PARAM_TEXT);
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// Only accept launch requests from this endpoint.
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if ($messagetype != "basic-lti-launch-request") {
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throw new \moodle_exception('invalidrequest', 'enrol_lti');
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exit();
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}
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// Initialise tool provider.
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$toolprovider = new \enrol_lti\tool_provider($toolid);
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// Special handling for LTIv1 launch requests.
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if ($ltiversion === \IMSGlobal\LTI\ToolProvider\ToolProvider::LTI_VERSION1) {
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$dataconnector = new \enrol_lti\data_connector();
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$consumer = new \IMSGlobal\LTI\ToolProvider\ToolConsumer($consumerkey, $dataconnector);
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// Check if the consumer has already been registered to the enrol_lti_lti2_consumer table. Register if necessary.
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$consumer->ltiVersion = \IMSGlobal\LTI\ToolProvider\ToolProvider::LTI_VERSION1;
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// For LTIv1, set the tool secret as the consumer secret.
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$consumer->secret = $tool->secret;
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$consumer->name = optional_param('tool_consumer_instance_name', '', PARAM_TEXT);
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$consumer->consumerName = $consumer->name;
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$consumer->consumerGuid = optional_param('tool_consumer_instance_guid', null, PARAM_TEXT);
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$consumer->consumerVersion = optional_param('tool_consumer_info_version', null, PARAM_TEXT);
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$consumer->enabled = true;
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$consumer->protected = true;
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$consumer->save();
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// Set consumer to tool provider.
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$toolprovider->consumer = $consumer;
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// Map tool consumer and published tool, if necessary.
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$toolprovider->map_tool_to_consumer();
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}
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// Handle the request.
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$toolprovider->handleRequest();
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echo $OUTPUT->header();
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echo $OUTPUT->footer();
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