mod/resource/view.php

   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($CFG->dirroot.'/mod/resource/locallib.php');
  28 require_once($CFG->libdir.'/completionlib.php');
  29
  30 $id       = optional_param('id', 0, PARAM_INT); // Course Module ID
  31 $r        = optional_param('r', 0, PARAM_INT);  // Resource instance ID
  32 $redirect = optional_param('redirect', 0, PARAM_BOOL);
  33
  34 if ($r) {
  35     if (!$resource = $DB->get_record('resource', array('id'=>$r))) {
  36         resource_redirect_if_migrated($r, 0);
  37         print_error('invalidaccessparameter');
  38     }
  39     $cm = get_coursemodule_from_instance('resource', $resource->id, $resource->course, false, MUST_EXIST);
  40
  41 } else {
  42     if (!$cm = get_coursemodule_from_id('resource', $id)) {
  43         resource_redirect_if_migrated(0, $id);
  44         print_error('invalidcoursemodule');
  45     }
  46     $resource = $DB->get_record('resource', array('id'=>$cm->instance), '*', MUST_EXIST);
  47 }
  48
  49 $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  50
  51 require_course_login($course, true, $cm);
  52 $context = context_module::instance($cm->id);
  53 require_capability('mod/resource:view', $context);
  54
  55 $params = array(
  56     'context' => $context,
  57     'objectid' => $resource->id
  58 );
  59 $event = \mod_resource\event\course_module_viewed::create($params);
  60 $event->add_record_snapshot('course_modules', $cm);
  61 $event->add_record_snapshot('course', $course);
  62 $event->add_record_snapshot('resource', $resource);
  63 $event->trigger();
  64
  65 // Update 'viewed' state if required by completion system
  66 $completion = new completion_info($course);
  67 $completion->set_module_viewed($cm);
  68
  69 $PAGE->set_url('/mod/resource/view.php', array('id' => $cm->id));
  70
  71 if ($resource->tobemigrated) {
  72     resource_print_tobemigrated($resource, $cm, $course);
  73     die;
  74 }
  75
  76 $fs = get_file_storage();
  77 $files = $fs->get_area_files($context->id, 'mod_resource', 'content', 0, 'sortorder DESC, id ASC', false); // TODO: this is not very efficient!!
  78 if (count($files) < 1) {
  79     resource_print_filenotfound($resource, $cm, $course);
  80     die;
  81 } else {
  82     $file = reset($files);
  83     unset($files);
  84 }
  85
  86 $resource->mainfile = $file->get_filename();
  87 $displaytype = resource_get_final_display_type($resource);
  88 if ($displaytype == RESOURCELIB_DISPLAY_OPEN || $displaytype == RESOURCELIB_DISPLAY_DOWNLOAD) {
  89     // For 'open' and 'download' links, we always redirect to the content - except
  90     // if the user just chose 'save and display' from the form then that would be
  91     // confusing
  92     if (!isset($_SERVER['HTTP_REFERER']) || strpos($_SERVER['HTTP_REFERER'], 'modedit.php') === false) {
  93         $redirect = true;
  94     }
  95 }
  96
  97 if ($redirect) {
  98     // coming from course page or url index page
  99     // this redirect trick solves caching problems when tracking views ;-)
 100     $path = '/'.$context->id.'/mod_resource/content/'.$resource->revision.$file->get_filepath().$file->get_filename();
 101     $fullurl = moodle_url::make_file_url('/pluginfile.php', $path, $displaytype == RESOURCELIB_DISPLAY_DOWNLOAD);
 102     redirect($fullurl);
 103 }
 104
 105 switch ($displaytype) {
 106     case RESOURCELIB_DISPLAY_EMBED:
 107         resource_display_embed($resource, $cm, $course, $file);
 108         break;
 109     case RESOURCELIB_DISPLAY_FRAME:
 110         resource_display_frame($resource, $cm, $course, $file);
 111         break;
 112     default:
 113         resource_print_workaround($resource, $cm, $course, $file);
 114         break;
 115 }
 116