.
/**
* Subscribe to or unsubscribe from a forum.
*
* @package mod-forum
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once("../../config.php");
require_once("lib.php");
$id = required_param('id',PARAM_INT); // The forum to subscribe or unsubscribe to
$mode = optional_param('mode',false,PARAM_INT); // Force everyone to be subscribed to this forum?
$user = optional_param('user',0,PARAM_INT);
$url = new moodle_url('/mod/forum/subscribe.php', array('id'=>$id));
if ($mode !== '') {
$url->param('force', $mode);
}
if ($user !== 0) {
$url->param('user', $user);
}
$PAGE->set_url($url);
if (! $forum = $DB->get_record("forum", array("id" => $id))) {
print_error('invalidforumid', 'forum');
}
if (! $course = $DB->get_record("course", array("id" => $forum->course))) {
print_error('invalidcoursemodule');
}
$cm = get_coursemodule_from_instance("forum", $forum->id, $course->id, false, MUST_EXIST);
$context = get_context_instance(CONTEXT_MODULE, $cm->id);
if ($user) {
if (!has_capability('mod/forum:managesubscriptions', $context)) {
print_error('nopermissiontosubscribe', 'forum');
}
if (!$user = $DB->get_record("user", array("id" => $user))) {
print_error('invaliduserid');
}
} else {
$user = $USER;
}
if (isset($cm->groupmode) && empty($course->groupmodeforce)) {
$groupmode = $cm->groupmode;
} else {
$groupmode = $course->groupmode;
}
if ($groupmode && !forum_is_subscribed($user->id, $forum) && !has_capability('moodle/site:accessallgroups', $context)) {
if (!groups_get_all_groups($course->id, $USER->id)) {
print_error('cannotsubscribe', 'forum');
}
}
require_login($course->id, false, $cm);
if (!is_enrolled($context)) { // Guests and visitors can't subscribe - only enrolled
$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
echo $OUTPUT->header();
echo $OUTPUT->confirm(get_string('noguestsubscribe', 'forum').'
'.get_string('liketologin'),
get_login_url(), new moodle_url('/mod/forum/view.php', array('f'=>$id)));
echo $OUTPUT->footer();
exit;
}
$returnto = optional_param('backtoindex',0,PARAM_INT)
? "index.php?id=".$course->id
: "view.php?f=$id";
if ($mode !== false && has_capability('mod/forum:managesubscriptions', $context)) {
switch ($mode) {
case FORUM_CHOOSESUBSCRIBE : // 0
forum_forcesubscribe($forum->id, 0);
redirect($returnto, get_string("everyonecannowchoose", "forum"), 1);
break;
case FORUM_FORCESUBSCRIBE : // 1
forum_forcesubscribe($forum->id, 1);
redirect($returnto, get_string("everyoneisnowsubscribed", "forum"), 1);
break;
case FORUM_INITIALSUBSCRIBE : // 2
forum_forcesubscribe($forum->id, 2);
redirect($returnto, get_string("everyoneisnowsubscribed", "forum"), 1);
break;
case FORUM_DISALLOWSUBSCRIBE : // 3
forum_forcesubscribe($forum->id, 3);
redirect($returnto, get_string("noonecansubscribenow", "forum"), 1);
break;
default:
print_error(get_string('invalidforcesubscribe', 'forum'));
}
}
if (forum_is_forcesubscribed($forum)) {
redirect($returnto, get_string("everyoneisnowsubscribed", "forum"), 1);
}
$info->name = fullname($user);
$info->forum = format_string($forum->name);
if (forum_is_subscribed($user->id, $forum->id)) {
if (forum_unsubscribe($user->id, $forum->id)) {
add_to_log($course->id, "forum", "unsubscribe", "view.php?f=$forum->id", $forum->id, $cm->id);
redirect($returnto, get_string("nownotsubscribed", "forum", $info), 1);
} else {
print_error('cannotunsubscribe', 'forum', $_SERVER["HTTP_REFERER"]);
}
} else { // subscribe
if ($forum->forcesubscribe == FORUM_DISALLOWSUBSCRIBE &&
!has_capability('mod/forum:managesubscriptions', $context)) {
print_error('disallowsubscribe', 'forum', $_SERVER["HTTP_REFERER"]);
}
if (!has_capability('mod/forum:viewdiscussion', $context)) {
print_error('cannotsubscribe', 'forum', $_SERVER["HTTP_REFERER"]);
}
if (forum_subscribe($user->id, $forum->id) ) {
add_to_log($course->id, "forum", "subscribe", "view.php?f=$forum->id", $forum->id, $cm->id);
redirect($returnto, get_string("nowsubscribed", "forum", $info), 1);
} else {
print_error('cannotsubscribe', 'forum', $_SERVER["HTTP_REFERER"]);
}
}