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   1  <?php
   2  
   3  // This file is part of Moodle - http://moodle.org/
   4  //
   5  // Moodle is free software: you can redistribute it and/or modify
   6  // it under the terms of the GNU General Public License as published by
   7  // the Free Software Foundation, either version 3 of the License, or
   8  // (at your option) any later version.
   9  //
  10  // Moodle is distributed in the hope that it will be useful,
  11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  // GNU General Public License for more details.
  14  //
  15  // You should have received a copy of the GNU General Public License
  16  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17  
  18  /**
  19   * Resource module version information
  20   *
  21   * @package    mod_resource
  22   * @copyright  2009 Petr Skoda  {@link http://skodak.org}
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  require('../../config.php');
  27  require_once($CFG->dirroot.'/mod/resource/lib.php');
  28  require_once($CFG->dirroot.'/mod/resource/locallib.php');
  29  require_once($CFG->libdir.'/completionlib.php');
  30  
  31  $id       = optional_param('id', 0, PARAM_INT); // Course Module ID
  32  $r        = optional_param('r', 0, PARAM_INT);  // Resource instance ID
  33  $redirect = optional_param('redirect', 0, PARAM_BOOL);
  34  
  35  if ($r) {
  36      if (!$resource = $DB->get_record('resource', array('id'=>$r))) {
  37          resource_redirect_if_migrated($r, 0);
  38          print_error('invalidaccessparameter');
  39      }
  40      $cm = get_coursemodule_from_instance('resource', $resource->id, $resource->course, false, MUST_EXIST);
  41  
  42  } else {
  43      if (!$cm = get_coursemodule_from_id('resource', $id)) {
  44          resource_redirect_if_migrated(0, $id);
  45          print_error('invalidcoursemodule');
  46      }
  47      $resource = $DB->get_record('resource', array('id'=>$cm->instance), '*', MUST_EXIST);
  48  }
  49  
  50  $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  51  
  52  require_course_login($course, true, $cm);
  53  $context = context_module::instance($cm->id);
  54  require_capability('mod/resource:view', $context);
  55  
  56  // Completion and trigger events.
  57  resource_view($resource, $course, $cm, $context);
  58  
  59  $PAGE->set_url('/mod/resource/view.php', array('id' => $cm->id));
  60  
  61  if ($resource->tobemigrated) {
  62      resource_print_tobemigrated($resource, $cm, $course);
  63      die;
  64  }
  65  
  66  $fs = get_file_storage();
  67  $files = $fs->get_area_files($context->id, 'mod_resource', 'content', 0, 'sortorder DESC, id ASC', false); // TODO: this is not very efficient!!
  68  if (count($files) < 1) {
  69      resource_print_filenotfound($resource, $cm, $course);
  70      die;
  71  } else {
  72      $file = reset($files);
  73      unset($files);
  74  }
  75  
  76  $resource->mainfile = $file->get_filename();
  77  $displaytype = resource_get_final_display_type($resource);
  78  if ($displaytype == RESOURCELIB_DISPLAY_OPEN || $displaytype == RESOURCELIB_DISPLAY_DOWNLOAD) {
  79      // For 'open' and 'download' links, we always redirect to the content - except
  80      // if the user just chose 'save and display' from the form then that would be
  81      // confusing
  82      if (strpos(get_local_referer(false), 'modedit.php') === false) {
  83          $redirect = true;
  84      }
  85  }
  86  
  87  // Don't redirect teachers, otherwise they can not access course or module settings.
  88  if ($redirect && !course_get_format($course)->has_view_page() &&
  89          (has_capability('moodle/course:manageactivities', $context) ||
  90          has_capability('moodle/course:update', context_course::instance($course->id)))) {
  91      $redirect = false;
  92  }
  93  
  94  if ($redirect) {
  95      // coming from course page or url index page
  96      // this redirect trick solves caching problems when tracking views ;-)
  97      $path = '/'.$context->id.'/mod_resource/content/'.$resource->revision.$file->get_filepath().$file->get_filename();
  98      $fullurl = moodle_url::make_file_url('/pluginfile.php', $path, $displaytype == RESOURCELIB_DISPLAY_DOWNLOAD);
  99      redirect($fullurl);
 100  }
 101  
 102  switch ($displaytype) {
 103      case RESOURCELIB_DISPLAY_EMBED:
 104          resource_display_embed($resource, $cm, $course, $file);
 105          break;
 106      case RESOURCELIB_DISPLAY_FRAME:
 107          resource_display_frame($resource, $cm, $course, $file);
 108          break;
 109      default:
 110          resource_print_workaround($resource, $cm, $course, $file);
 111          break;
 112  }
 113