mod/lti/launch.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16 //
  17 // This file is part of BasicLTI4Moodle
  18 //
  19 // BasicLTI4Moodle is an IMS BasicLTI (Basic Learning Tools for Interoperability)
  20 // consumer for Moodle 1.9 and Moodle 2.0. BasicLTI is a IMS Standard that allows web
  21 // based learning tools to be easily integrated in LMS as native ones. The IMS BasicLTI
  22 // specification is part of the IMS standard Common Cartridge 1.1 Sakai and other main LMS
  23 // are already supporting or going to support BasicLTI. This project Implements the consumer
  24 // for Moodle. Moodle is a Free Open source Learning Management System by Martin Dougiamas.
  25 // BasicLTI4Moodle is a project iniciated and leaded by Ludo(Marc Alier) and Jordi Piguillem
  26 // at the GESSI research group at UPC.
  27 // SimpleLTI consumer for Moodle is an implementation of the early specification of LTI
  28 // by Charles Severance (Dr Chuck) htp://dr-chuck.com , developed by Jordi Piguillem in a
  29 // Google Summer of Code 2008 project co-mentored by Charles Severance and Marc Alier.
  30 //
  31 // BasicLTI4Moodle is copyright 2009 by Marc Alier Forment, Jordi Piguillem and Nikolas Galanis
  32 // of the Universitat Politecnica de Catalunya http://www.upc.edu
  33 // Contact info: Marc Alier Forment granludo @ gmail.com or marc.alier @ upc.edu.
  34
  35 /**
  36  * This file contains all necessary code to view a lti activity instance
  37  *
  38  * @package mod_lti
  39  * @copyright  2009 Marc Alier, Jordi Piguillem, Nikolas Galanis
  40  *  marc.alier@upc.edu
  41  * @copyright  2009 Universitat Politecnica de Catalunya http://www.upc.edu
  42  * @author     Marc Alier
  43  * @author     Jordi Piguillem
  44  * @author     Nikolas Galanis
  45  * @author     Chris Scribner
  46  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  47  */
  48
  49 require_once("../../config.php");
  50 require_once($CFG->dirroot.'/mod/lti/lib.php');
  51 require_once($CFG->dirroot.'/mod/lti/locallib.php');
  52
  53 $cmid = required_param('id', PARAM_INT); // Course Module ID.
  54 $triggerview = optional_param('triggerview', 1, PARAM_BOOL);
  55 $action = optional_param('action', '', PARAM_TEXT);
  56 $foruserid = optional_param('user', 0, PARAM_INT);
  57
  58 $cm = get_coursemodule_from_id('lti', $cmid, 0, false, MUST_EXIST);
  59 $lti = $DB->get_record('lti', array('id' => $cm->instance), '*', MUST_EXIST);
  60
  61 $typeid = $lti->typeid;
  62 if (empty($typeid) && ($tool = lti_get_tool_by_url_match($lti->toolurl))) {
  63     $typeid = $tool->id;
  64 }
  65 if ($typeid) {
  66     $config = lti_get_type_config($typeid);
  67     $missingtooltype = empty($config);
  68     if (!$missingtooltype) {
  69         $config = lti_get_type_type_config($typeid);
  70         if ($config->lti_ltiversion === LTI_VERSION_1P3) {
  71             if (!isset($SESSION->lti_initiatelogin_status)) {
  72                 $msgtype = 'basic-lti-launch-request';
  73                 if ($action === 'gradeReport') {
  74                     $msgtype = 'LtiSubmissionReviewRequest';
  75                 }
  76                 echo lti_initiate_login($cm->course, $cmid, $lti, $config, $msgtype, '', '', $foruserid);
  77                 exit;
  78             } else {
  79                 unset($SESSION->lti_initiatelogin_status);
  80             }
  81         }
  82     }
  83 }
  84
  85 $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
  86
  87 $context = context_module::instance($cm->id);
  88
  89 require_login($course, true, $cm);
  90 require_capability('mod/lti:view', $context);
  91
  92 if (!empty($missingtooltype)) {
  93     $PAGE->set_url(new moodle_url('/mod/lti/launch.php'));
  94     $PAGE->set_context($context);
  95     $PAGE->set_secondary_active_tab('modulepage');
  96     $PAGE->set_pagelayout('incourse');
  97     echo $OUTPUT->header();
  98     throw new moodle_exception('tooltypenotfounderror', 'mod_lti');
  99 }
 100
 101 // Completion and trigger events.
 102 if ($triggerview) {
 103     lti_view($lti, $course, $cm, $context);
 104 }
 105
 106 $lti->cmid = $cm->id;
 107 lti_launch_tool($lti, $foruserid);