mod/lti/contentitem.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 sending a user to a tool provider to initiate a content-item selection.
  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($CFG->dirroot . '/mod/lti/lib.php');
  28 require_once($CFG->dirroot . '/mod/lti/locallib.php');
  29
  30 $id = required_param('id', PARAM_INT);
  31 $courseid = required_param('course', PARAM_INT);
  32 $title = optional_param('title', '', PARAM_TEXT);
  33 $text = optional_param('text', '', PARAM_RAW);
  34
  35 $config = lti_get_type_type_config($id);
  36 if ($config->lti_ltiversion === LTI_VERSION_1P3) {
  37     if (!isset($SESSION->lti_initiatelogin_status)) {
  38         echo lti_initiate_login($courseid, 0, null, $config, 'ContentItemSelectionRequest', $title, $text);
  39         exit;
  40     } else {
  41         unset($SESSION->lti_initiatelogin_status);
  42     }
  43 }
  44
  45 // Check access and capabilities.
  46 $course = $DB->get_record('course', array('id' => $courseid), '*', MUST_EXIST);
  47 require_login($course);
  48 $context = context_course::instance($courseid);
  49 require_capability('moodle/course:manageactivities', $context);
  50 require_capability('mod/lti:addcoursetool', $context);
  51
  52 // Set the return URL. We send the launch container along to help us avoid frames-within-frames when the user returns.
  53 $returnurlparams = [
  54     'course' => $course->id,
  55     'id' => $id,
  56     'sesskey' => sesskey()
  57 ];
  58 $returnurl = new \moodle_url('/mod/lti/contentitem_return.php', $returnurlparams);
  59
  60 // Prepare the request.
  61 $request = lti_build_content_item_selection_request($id, $course, $returnurl, $title, $text, [], []);
  62
  63 // Get the launch HTML.
  64 $content = lti_post_launch_html($request->params, $request->url, false);
  65
  66 echo $content;