mod/forum/subscribe.php

   1 <?php // $Id$
   2
   3 //  Subscribe to or unsubscribe from a forum.
   4
   5     require_once("../../config.php");
   6     require_once("lib.php");
   7
   8     $id = required_param('id',PARAM_INT);      // The forum to subscribe or unsubscribe to
   9     $force = optional_param('force','',PARAM_ALPHA);  // Force everyone to be subscribed to this forum?
  10     $user = optional_param('user',0,PARAM_INT);
  11
  12     if (! $forum = get_record("forum", "id", $id)) {
  13         error("Forum ID was incorrect");
  14     }
  15
  16     if (! $course = get_record("course", "id", $forum->course)) {
  17         error("Forum doesn't belong to a course!");
  18     }
  19
  20     if ($cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
  21         $context = get_context_instance(CONTEXT_MODULE, $cm->id);
  22     } else {
  23         $cm->id = 0;
  24         $context = get_context_instance(CONTEXT_MODULE, $cm->id);
  25     }
  26
  27     if ($user) {
  28         if (!has_capability('mod/forum:managesubscriptions', $context)) {
  29             error('You do not have the permission to subscribe/unsubscribe other people!');
  30         }
  31         if (!$user = get_record("user", "id", $user)) {
  32             error("User ID was incorrect");
  33         }
  34     } else {
  35         $user = $USER;
  36     }
  37
  38     if (groupmode($course, $cm)
  39                 and !forum_is_subscribed($user->id, $forum)
  40                 and !has_capability('moodle/site:accessallgroups', $context)) {
  41         if (!mygroupid($course->id)) {
  42             error('Sorry, but you must be a group member to subscribe.');
  43         }
  44     }
  45
  46     require_login($course->id, false, $cm);
  47
  48     if (isguest()) {   // Guests can't subscribe
  49         $wwwroot = $CFG->wwwroot.'/login/index.php';
  50         if (!empty($CFG->loginhttps)) {
  51             $wwwroot = str_replace('http:','https:', $wwwroot);
  52         }
  53
  54         $navigation = build_navigation('', $cm);
  55         print_header($course->shortname, $course->fullname, $navigation, '', '', true, "", navmenu($course, $cm));
  56
  57         notice_yesno(get_string('noguestsubscribe', 'forum').'<br /><br />'.get_string('liketologin'),
  58                      $wwwroot, $_SERVER['HTTP_REFERER']);
  59         print_footer($course);
  60         exit;
  61     }
  62
  63     $returnto = optional_param('backtoindex',0,PARAM_INT)
  64         ? "index.php?id=".$course->id
  65         : "view.php?f=$id";
  66
  67     if ($force and has_capability('mod/forum:managesubscriptions', $context)) {
  68         if (forum_is_forcesubscribed($forum)) {
  69             forum_forcesubscribe($forum->id, 0);
  70             redirect($returnto, get_string("everyonecannowchoose", "forum"), 1);
  71         } else {
  72             forum_forcesubscribe($forum->id, 1);
  73             redirect($returnto, get_string("everyoneisnowsubscribed", "forum"), 1);
  74         }
  75     }
  76
  77     if (forum_is_forcesubscribed($forum)) {
  78         redirect($returnto, get_string("everyoneisnowsubscribed", "forum"), 1);
  79     }
  80
  81     $info->name  = fullname($user);
  82     $info->forum = format_string($forum->name);
  83
  84     if (forum_is_subscribed($user->id, $forum->id)) {
  85         if (forum_unsubscribe($user->id, $forum->id)) {
  86             add_to_log($course->id, "forum", "unsubscribe", "view.php?f=$forum->id", $forum->id, $cm->id);
  87             redirect($returnto, get_string("nownotsubscribed", "forum", $info), 1);
  88         } else {
  89             error("Could not unsubscribe you from that forum", $_SERVER["HTTP_REFERER"]);
  90         }
  91
  92     } else {  // subscribe
  93         if ($forum->forcesubscribe == FORUM_DISALLOWSUBSCRIBE &&
  94                     !has_capability('mod/forum:managesubscriptions', $context)) {
  95             print_error('disallowsubscribe', 'forum', $_SERVER["HTTP_REFERER"]);
  96         }
  97         if (!has_capability('mod/forum:viewdiscussion', $context)) {
  98             error("Could not subscribe you to that forum", $_SERVER["HTTP_REFERER"]);
  99         }
 100         if (forum_subscribe($user->id, $forum->id) ) {
 101             add_to_log($course->id, "forum", "subscribe", "view.php?f=$forum->id", $forum->id, $cm->id);
 102             redirect($returnto, get_string("nowsubscribed", "forum", $info), 1);
 103         } else {
 104             error("Could not subscribe you to that forum", $_SERVER["HTTP_REFERER"]);
 105         }
 106     }
 107
 108 ?>