mod/lti/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 back to Moodle from the tool provider
  19  *
  20  * @package mod_lti
  21  * @copyright  Copyright (c) 2011 Moodlerooms Inc. (http://www.moodlerooms.com)
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  * @author     Chris Scribner
  24  */
  25
  26 require_once('../../config.php');
  27 require_once($CFG->dirroot.'/mod/lti/lib.php');
  28 require_once($CFG->dirroot.'/mod/lti/locallib.php');
  29
  30 $courseid = required_param('course', PARAM_INT);
  31 $instanceid = optional_param('instanceid', 0, PARAM_INT);
  32
  33 $errormsg = optional_param('lti_errormsg', '', PARAM_TEXT);
  34 $msg = optional_param('lti_msg', '', PARAM_TEXT);
  35 $unsigned = optional_param('unsigned', '0', PARAM_INT);
  36
  37 $launchcontainer = optional_param('launch_container', LTI_LAUNCH_CONTAINER_WINDOW, PARAM_INT);
  38
  39 $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
  40 $lti = null;
  41 $context = null;
  42 if (!empty($instanceid)) {
  43     $lti = $DB->get_record('lti', array('id' => $instanceid), '*', MUST_EXIST);
  44     $cm = get_coursemodule_from_instance('lti', $lti->id, $lti->course, false, MUST_EXIST);
  45     $context = context_module::instance($cm->id);
  46 }
  47
  48
  49 require_login($course);
  50 require_sesskey();
  51
  52 if (!empty($errormsg) || !empty($msg)) {
  53     $url = new moodle_url('/mod/lti/return.php', array('course' => $courseid));
  54     $PAGE->set_url($url);
  55
  56     $pagetitle = strip_tags($course->shortname);
  57     $PAGE->set_title($pagetitle);
  58     $PAGE->set_heading($course->fullname);
  59
  60     // Avoid frame-in-frame action.
  61     if ($launchcontainer == LTI_LAUNCH_CONTAINER_EMBED || $launchcontainer == LTI_LAUNCH_CONTAINER_EMBED_NO_BLOCKS) {
  62         $PAGE->set_pagelayout('embedded');
  63     } else {
  64         $PAGE->set_pagelayout('incourse');
  65     }
  66
  67     echo $OUTPUT->header();
  68     if (!empty($lti) and !empty($context)) {
  69         echo $OUTPUT->heading(format_string($lti->name, true, array('context' => $context)));
  70     }
  71 }
  72
  73 if (!empty($errormsg)) {
  74     echo get_string('lti_launch_error', 'lti');
  75
  76     p($errormsg);
  77
  78     if ($unsigned == 1) {
  79
  80         $contextcourse = context_course::instance($courseid);
  81         echo '<br /><br />';
  82         $links = new stdClass();
  83
  84         if (has_capability('mod/lti:addcoursetool', $contextcourse)) {
  85             $coursetooleditor = new moodle_url('mod/lti/coursetools.php', ['id' => $courseid]);
  86             $links->course_tool_editor = $coursetooleditor->out(false);
  87
  88             echo get_string('lti_launch_error_unsigned_help', 'lti', $links);
  89         }
  90
  91         if (!empty($lti) && has_capability('mod/lti:requesttooladd', $contextcourse)) {
  92             $adminrequesturl = new moodle_url('/mod/lti/request_tool.php', array('instanceid' => $lti->id, 'sesskey' => sesskey()));
  93             $links->admin_request_url = $adminrequesturl->out(false);
  94
  95             echo get_string('lti_launch_error_tool_request', 'lti', $links);
  96         }
  97     }
  98
  99     echo $OUTPUT->footer();
 100 } else if (!empty($msg)) {
 101
 102     p($msg);
 103
 104     echo $OUTPUT->footer();
 105
 106 } else {
 107     $courseurl = new moodle_url('/course/view.php', array('id' => $courseid));
 108     $url = $courseurl->out();
 109
 110     // Avoid frame-in-frame action.
 111     if ($launchcontainer == LTI_LAUNCH_CONTAINER_EMBED || $launchcontainer == LTI_LAUNCH_CONTAINER_EMBED_NO_BLOCKS) {
 112         // Output a page containing some script to break out of frames and redirect them.
 113
 114         echo '<html><body>';
 115
 116         $script = "
 117             <script type=\"text/javascript\">
 118             //<![CDATA[
 119                 if(window != top){
 120                     top.location.href = '{$url}';
 121                 } else {
 122                     window.location.href = '{$url}';
 123                 }
 124             //]]
 125             </script>
 126         ";
 127
 128         $clickhere = get_string('return_to_course', 'lti', (object)array('link' => $url));
 129
 130         $noscript = "
 131             <noscript>
 132                 {$clickhere}
 133             </noscript>
 134         ";
 135
 136         echo $script;
 137         echo $noscript;
 138
 139         echo '</body></html>';
 140     } else {
 141         // If no error, take them back to the course.
 142         redirect($url);
 143     }
 144 }