mod/lti/contentitem_return.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 /**
  18  * Handle the return from the Tool Provider after selecting a content item.
  19  *
  20  * @package mod_lti
  21  * @copyright  2015 Vital Source Technologies http://vitalsource.com
  22  * @author     Stephen Vickers
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26 require_once('../../config.php');
  27 require_once($CFG->dirroot . '/mod/lti/locallib.php');
  28
  29 $id = required_param('id', PARAM_INT);
  30 $courseid = required_param('course', PARAM_INT);
  31
  32 $jwt = optional_param('JWT', '', PARAM_RAW);
  33
  34 $context = context_course::instance($courseid);
  35
  36 $pageurl = new moodle_url('/mod/lti/contentitem_return.php');
  37 $PAGE->set_url($pageurl);
  38 $PAGE->set_pagelayout('popup');
  39 $PAGE->set_context($context);
  40
  41 // Cross-Site causes the cookie to be lost if not POSTed from same site.
  42 global $_POST;
  43 if (!empty($_POST["repost"])) {
  44     // Unset the param so that LTI 1.1 signature validation passes.
  45     unset($_POST["repost"]);
  46 } else if (!isloggedin()) {
  47     header_remove("Set-Cookie");
  48     $output = $PAGE->get_renderer('mod_lti');
  49     $page = new \mod_lti\output\repost_crosssite_page($_SERVER['REQUEST_URI'], $_POST);
  50     echo $output->header();
  51     echo $output->render($page);
  52     echo $output->footer();
  53     return;
  54 }
  55
  56 if (!empty($jwt)) {
  57     $params = lti_convert_from_jwt($id, $jwt);
  58     $consumerkey = $params['oauth_consumer_key'] ?? '';
  59     $messagetype = $params['lti_message_type'] ?? '';
  60     $version = $params['lti_version'] ?? '';
  61     $items = $params['content_items'] ?? '';
  62     $errormsg = $params['lti_errormsg'] ?? '';
  63     $msg = $params['lti_msg'] ?? '';
  64 } else {
  65     $consumerkey = required_param('oauth_consumer_key', PARAM_RAW);
  66     $messagetype = required_param('lti_message_type', PARAM_TEXT);
  67     $version = required_param('lti_version', PARAM_TEXT);
  68     $items = optional_param('content_items', '', PARAM_RAW);
  69     $errormsg = optional_param('lti_errormsg', '', PARAM_TEXT);
  70     $msg = optional_param('lti_msg', '', PARAM_TEXT);
  71     lti_verify_oauth_signature($id, $consumerkey);
  72 }
  73
  74 $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
  75 require_login($course);
  76 require_sesskey();
  77 require_capability('moodle/course:manageactivities', $context);
  78 require_capability('mod/lti:addcoursetool', $context);
  79
  80 $redirecturl = null;
  81 $returndata = null;
  82 if (empty($errormsg) && !empty($items)) {
  83     try {
  84         $returndata = lti_tool_configuration_from_content_item($id, $messagetype, $version, $consumerkey, $items);
  85     } catch (moodle_exception $e) {
  86         $errormsg = $e->getMessage();
  87     }
  88 }
  89
  90 echo $OUTPUT->header();
  91
  92 // Call JS module to redirect the user to the course page or close the dialogue on error/cancel.
  93 $PAGE->requires->js_call_amd('mod_lti/contentitem_return', 'init', [$returndata]);
  94
  95 echo $OUTPUT->footer();
  96
  97 // Add messages to notification stack for rendering later.
  98 if ($errormsg) {
  99     // Content item selection has encountered an error.
 100     \core\notification::error($errormsg);
 101
 102 } else if (!empty($returndata)) {
 103     // Means success.
 104     if (!$msg) {
 105         $msg = get_string('successfullyfetchedtoolconfigurationfromcontent', 'lti');
 106     }
 107     \core\notification::success($msg);
 108 }