mod/url/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  * URL module main user interface
  20  *
  21  * @package    mod_url
  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("$CFG->dirroot/mod/url/lib.php");
  28 require_once("$CFG->dirroot/mod/url/locallib.php");
  29 require_once($CFG->libdir . '/completionlib.php');
  30
  31 $id       = optional_param('id', 0, PARAM_INT);        // Course module ID
  32 $u        = optional_param('u', 0, PARAM_INT);         // URL instance id
  33 $redirect = optional_param('redirect', 0, PARAM_BOOL);
  34 $forceview = optional_param('forceview', 0, PARAM_BOOL);
  35
  36 if ($u) {  // Two ways to specify the module
  37     $url = $DB->get_record('url', array('id'=>$u), '*', MUST_EXIST);
  38     $cm = get_coursemodule_from_instance('url', $url->id, $url->course, false, MUST_EXIST);
  39
  40 } else {
  41     $cm = get_coursemodule_from_id('url', $id, 0, false, MUST_EXIST);
  42     $url = $DB->get_record('url', array('id'=>$cm->instance), '*', MUST_EXIST);
  43 }
  44
  45 $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  46
  47 require_course_login($course, true, $cm);
  48 $context = context_module::instance($cm->id);
  49 require_capability('mod/url:view', $context);
  50
  51 // Completion and trigger events.
  52 url_view($url, $course, $cm, $context);
  53
  54 $PAGE->set_url('/mod/url/view.php', array('id' => $cm->id));
  55
  56 // Make sure URL exists before generating output - some older sites may contain empty urls
  57 // Do not use PARAM_URL here, it is too strict and does not support general URIs!
  58 $exturl = trim($url->externalurl);
  59 if (empty($exturl) or $exturl === 'http://') {
  60     url_print_header($url, $cm, $course);
  61     url_print_heading($url, $cm, $course);
  62     url_print_intro($url, $cm, $course);
  63     notice(get_string('invalidstoredurl', 'url'), new moodle_url('/course/view.php', array('id'=>$cm->course)));
  64     die;
  65 }
  66 unset($exturl);
  67
  68 $displaytype = url_get_final_display_type($url);
  69 if ($displaytype == RESOURCELIB_DISPLAY_OPEN) {
  70     $redirect = true;
  71 }
  72
  73 if ($redirect && !$forceview) {
  74     // coming from course page or url index page,
  75     // the redirection is needed for completion tracking and logging
  76     $fullurl = str_replace('&amp;', '&', url_get_full_url($url, $cm, $course));
  77
  78     if (!course_get_format($course)->has_view_page()) {
  79         // If course format does not have a view page, add redirection delay with a link to the edit page.
  80         // Otherwise teacher is redirected to the external URL without any possibility to edit activity or course settings.
  81         $editurl = null;
  82         if (has_capability('moodle/course:manageactivities', $context)) {
  83             $editurl = new moodle_url('/course/modedit.php', array('update' => $cm->id));
  84             $edittext = get_string('editthisactivity');
  85         } else if (has_capability('moodle/course:update', $context->get_course_context())) {
  86             $editurl = new moodle_url('/course/edit.php', array('id' => $course->id));
  87             $edittext = get_string('editcoursesettings');
  88         }
  89         if ($editurl) {
  90             redirect($fullurl, html_writer::link($editurl, $edittext)."<br/>".
  91                     get_string('pageshouldredirect'), 10);
  92         }
  93     }
  94     redirect($fullurl);
  95 }
  96
  97 switch ($displaytype) {
  98     case RESOURCELIB_DISPLAY_EMBED:
  99         url_display_embed($url, $cm, $course);
 100         break;
 101     case RESOURCELIB_DISPLAY_FRAME:
 102         url_display_frame($url, $cm, $course);
 103         break;
 104     default:
 105         url_print_workaround($url, $cm, $course);
 106         break;
 107 }