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   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($CFG->libdir.'/completionlib.php');
  51  require_once($CFG->dirroot.'/mod/lti/lib.php');
  52  require_once($CFG->dirroot.'/mod/lti/locallib.php');
  53  
  54  $id = optional_param('id', 0, PARAM_INT); // Course Module ID, or
  55  $l  = optional_param('l', 0, PARAM_INT);  // lti ID.
  56  
  57  if ($l) {  // Two ways to specify the module.
  58      $lti = $DB->get_record('lti', array('id' => $l), '*', MUST_EXIST);
  59      $cm = get_coursemodule_from_instance('lti', $lti->id, $lti->course, false, MUST_EXIST);
  60  
  61  } else {
  62      $cm = get_coursemodule_from_id('lti', $id, 0, false, MUST_EXIST);
  63      $lti = $DB->get_record('lti', array('id' => $cm->instance), '*', MUST_EXIST);
  64  }
  65  
  66  $course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
  67  
  68  if (!empty($lti->typeid)) {
  69      $toolconfig = lti_get_type_config($lti->typeid);
  70  } else if ($tool = lti_get_tool_by_url_match($lti->toolurl)) {
  71      $toolconfig = lti_get_type_config($tool->id);
  72  } else {
  73      $toolconfig = array();
  74  }
  75  
  76  $PAGE->set_cm($cm, $course); // Set's up global $COURSE.
  77  $context = context_module::instance($cm->id);
  78  $PAGE->set_context($context);
  79  
  80  require_login($course, true, $cm);
  81  require_capability('mod/lti:view', $context);
  82  
  83  $url = new moodle_url('/mod/lti/view.php', array('id' => $cm->id));
  84  $PAGE->set_url($url);
  85  
  86  $launchcontainer = lti_get_launch_container($lti, $toolconfig);
  87  
  88  if ($launchcontainer == LTI_LAUNCH_CONTAINER_EMBED_NO_BLOCKS) {
  89      $PAGE->set_pagelayout('frametop'); // Most frametops don't include footer, and pre-post blocks.
  90      $PAGE->blocks->show_only_fake_blocks(); // Disable blocks for layouts which do include pre-post blocks.
  91  } else if ($launchcontainer == LTI_LAUNCH_CONTAINER_REPLACE_MOODLE_WINDOW) {
  92      redirect('launch.php?id=' . $cm->id);
  93  } else {
  94      $PAGE->set_pagelayout('incourse');
  95  }
  96  
  97  $pagetitle = strip_tags($course->shortname.': '.format_string($lti->name));
  98  $PAGE->set_title($pagetitle);
  99  $PAGE->set_heading($course->fullname);
 100  
 101  // Print the page header.
 102  echo $OUTPUT->header();
 103  
 104  if ($lti->showtitlelaunch) {
 105      // Print the main part of the page.
 106      echo $OUTPUT->heading(format_string($lti->name, true, array('context' => $context)));
 107  }
 108  
 109  if ($lti->showdescriptionlaunch && $lti->intro) {
 110      echo $OUTPUT->box(format_module_intro('lti', $lti, $cm->id), 'generalbox description', 'intro');
 111  }
 112  
 113  if ( $launchcontainer == LTI_LAUNCH_CONTAINER_WINDOW ) {
 114      echo "<script language=\"javascript\">//<![CDATA[\n";
 115      echo "window.open('launch.php?id=".$cm->id."','lti-".$cm->id."');";
 116      echo "//]]\n";
 117      echo "</script>\n";
 118      echo "<p>".get_string("basiclti_in_new_window", "lti")."</p>\n";
 119      $url = new moodle_url('/mod/lti/launch.php', array('id' => $cm->id));
 120      echo html_writer::start_tag('p');
 121      echo html_writer::link($url, get_string("basiclti_in_new_window_open", "lti"), array('target' => '_blank'));
 122      echo html_writer::end_tag('p');
 123  } else {
 124      // Request the launch content with an iframe tag.
 125      echo '<iframe id="contentframe" height="600px" width="100%" src="launch.php?id='.$cm->id.'"></iframe>';
 126  
 127      // Output script to make the iframe tag be as large as possible.
 128      $resize = '
 129          <script type="text/javascript">
 130          //<![CDATA[
 131              YUI().use("node", "event", function(Y) {
 132                  //Take scrollbars off the outer document to prevent double scroll bar effect
 133                  var doc = Y.one("body");
 134                  doc.setStyle("overflow", "hidden");
 135  
 136                  var frame = Y.one("#contentframe");
 137                  var padding = 15; //The bottom of the iframe wasn\'t visible on some themes. Probably because of border widths, etc.
 138                  var lastHeight;
 139                  var resize = function(e) {
 140                      var viewportHeight = doc.get("winHeight");
 141                      if(lastHeight !== Math.min(doc.get("docHeight"), viewportHeight)){
 142                          frame.setStyle("height", viewportHeight - frame.getY() - padding + "px");
 143                          lastHeight = Math.min(doc.get("docHeight"), doc.get("winHeight"));
 144                      }
 145                  };
 146  
 147                  resize();
 148  
 149                  Y.on("windowresize", resize);
 150              });
 151          //]]
 152          </script>
 153  ';
 154  
 155      echo $resize;
 156  }
 157  
 158  // Finish the page.
 159  echo $OUTPUT->footer();