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($CFG->dirroot.'/mod/resource/lib.php');
  28 require_once($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 $forceview = optional_param('forceview', 0, PARAM_BOOL);
  35
  36 if ($r) {
  37     if (!$resource = $DB->get_record('resource', array('id'=>$r))) {
  38         resource_redirect_if_migrated($r, 0);
  39         throw new \moodle_exception('invalidaccessparameter');
  40     }
  41     $cm = get_coursemodule_from_instance('resource', $resource->id, $resource->course, false, MUST_EXIST);
  42
  43 } else {
  44     if (!$cm = get_coursemodule_from_id('resource', $id)) {
  45         resource_redirect_if_migrated(0, $id);
  46         throw new \moodle_exception('invalidcoursemodule');
  47     }
  48     $resource = $DB->get_record('resource', array('id'=>$cm->instance), '*', MUST_EXIST);
  49 }
  50
  51 $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  52
  53 require_course_login($course, true, $cm);
  54 $context = context_module::instance($cm->id);
  55 require_capability('mod/resource:view', $context);
  56
  57 // Completion and trigger events.
  58 resource_view($resource, $course, $cm, $context);
  59
  60 $PAGE->set_url('/mod/resource/view.php', array('id' => $cm->id));
  61
  62 if ($resource->tobemigrated) {
  63     resource_print_tobemigrated($resource, $cm, $course);
  64     die;
  65 }
  66
  67 $fs = get_file_storage();
  68 $files = $fs->get_area_files($context->id, 'mod_resource', 'content', 0, 'sortorder DESC, id ASC', false); // TODO: this is not very efficient!!
  69 if (count($files) < 1) {
  70     resource_print_filenotfound($resource, $cm, $course);
  71     die;
  72 } else {
  73     $file = reset($files);
  74     unset($files);
  75 }
  76
  77 $resource->mainfile = $file->get_filename();
  78 $displaytype = resource_get_final_display_type($resource);
  79 if ($displaytype == RESOURCELIB_DISPLAY_OPEN || $displaytype == RESOURCELIB_DISPLAY_DOWNLOAD) {
  80     $redirect = true;
  81 }
  82
  83 // Don't redirect teachers, otherwise they can not access course or module settings.
  84 if ($redirect && !course_get_format($course)->has_view_page() &&
  85         (has_capability('moodle/course:manageactivities', $context) ||
  86         has_capability('moodle/course:update', context_course::instance($course->id)))) {
  87     $redirect = false;
  88 }
  89
  90 if ($redirect && !$forceview) {
  91     // coming from course page or url index page
  92     // this redirect trick solves caching problems when tracking views ;-)
  93     $path = '/'.$context->id.'/mod_resource/content/'.$resource->revision.$file->get_filepath().$file->get_filename();
  94     $fullurl = moodle_url::make_file_url('/pluginfile.php', $path, $displaytype == RESOURCELIB_DISPLAY_DOWNLOAD);
  95     redirect($fullurl);
  96 }
  97
  98 switch ($displaytype) {
  99     case RESOURCELIB_DISPLAY_EMBED:
 100         resource_display_embed($resource, $cm, $course, $file);
 101         break;
 102     case RESOURCELIB_DISPLAY_FRAME:
 103         resource_display_frame($resource, $cm, $course, $file);
 104         break;
 105     default:
 106         resource_print_workaround($resource, $cm, $course, $file);
 107         break;
 108 }