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subscribe.php
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subscribe.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Subscribe to or unsubscribe from a cybrary or manage cybrary subscription mode
*
* This script can be used by either individual users to subscribe to or
* unsubscribe from a cybrary (no 'mode' param provided), or by cybrary managers
* to control the subscription mode (by 'mode' param).
* This script can be called from a link in email so the sesskey is not
* required parameter. However, if sesskey is missing, the user has to go
* through a confirmation page that redirects the user back with the
* sesskey.
*
* @package mod_cybrary
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(dirname(dirname(dirname(__FILE__))).'/config.php');
require_once($CFG->dirroot.'/mod/cybrary/lib.php');
$id = required_param('id', PARAM_INT); // The cybrary to set subscription on.
$mode = optional_param('mode', null, PARAM_INT); // The cybrary's subscription mode.
$user = optional_param('user', 0, PARAM_INT); // The userid of the user to subscribe, defaults to $USER.
$discussionid = optional_param('d', null, PARAM_INT); // The discussionid to subscribe.
$sesskey = optional_param('sesskey', null, PARAM_RAW);
$returnurl = optional_param('returnurl', null, PARAM_RAW);
$url = new moodle_url('/mod/cybrary/subscribe.php', array('id'=>$id));
if (!is_null($mode)) {
$url->param('mode', $mode);
}
if ($user !== 0) {
$url->param('user', $user);
}
if (!is_null($sesskey)) {
$url->param('sesskey', $sesskey);
}
if (!is_null($discussionid)) {
$url->param('d', $discussionid);
$discussion = $DB->get_record('cybrary_discussions', array('id' => $discussionid), '*', MUST_EXIST);
}
$PAGE->set_url($url);
$cybrary = $DB->get_record('cybrary', array('id' => $id), '*', MUST_EXIST);
$course = $DB->get_record('course', array('id' => $cybrary->course), '*', MUST_EXIST);
$cm = get_coursemodule_from_instance('cybrary', $cybrary->id, $course->id, false, MUST_EXIST);
$context = context_module::instance($cm->id);
if ($user) {
require_sesskey();
if (!has_capability('mod/cybrary:managesubscriptions', $context)) {
print_error('nopermissiontosubscribe', 'cybrary');
}
$user = $DB->get_record('user', array('id' => $user), '*', MUST_EXIST);
} else {
$user = $USER;
}
if (isset($cm->groupmode) && empty($course->groupmodeforce)) {
$groupmode = $cm->groupmode;
} else {
$groupmode = $course->groupmode;
}
$issubscribed = \mod_cybrary\subscriptions::is_subscribed($user->id, $cybrary, $discussionid, $cm);
// For a user to subscribe when a groupmode is set, they must have access to at least one group.
if ($groupmode && !$issubscribed && !has_capability('moodle/site:accessallgroups', $context)) {
if (!groups_get_all_groups($course->id, $USER->id)) {
print_error('cannotsubscribe', 'cybrary');
}
}
require_login($course, false, $cm);
if (is_null($mode) and !is_enrolled($context, $USER, '', true)) { // Guests and visitors can't subscribe - only enrolled
$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
if (isguestuser()) {
echo $OUTPUT->header();
echo $OUTPUT->confirm(get_string('subscribeenrolledonly', 'cybrary').'<br /><br />'.get_string('liketologin'),
get_login_url(), new moodle_url('/mod/cybrary/view.php', array('f'=>$id)));
echo $OUTPUT->footer();
exit;
} else {
// there should not be any links leading to this place, just redirect
redirect(new moodle_url('/mod/cybrary/view.php', array('f'=>$id)), get_string('subscribeenrolledonly', 'cybrary'));
}
}
$returnto = optional_param('backtoindex',0,PARAM_INT)
? "index.php?id=".$course->id
: "view.php?f=$id";
if ($returnurl) {
$returnto = $returnurl;
}
if (!is_null($mode) and has_capability('mod/cybrary:managesubscriptions', $context)) {
require_sesskey();
switch ($mode) {
case CYBRARY_CHOOSESUBSCRIBE : // 0
\mod_cybrary\subscriptions::set_subscription_mode($cybrary->id, CYBRARY_CHOOSESUBSCRIBE);
redirect($returnto, get_string("everyonecannowchoose", "cybrary"), 1);
break;
case CYBRARY_FORCESUBSCRIBE : // 1
\mod_cybrary\subscriptions::set_subscription_mode($cybrary->id, CYBRARY_FORCESUBSCRIBE);
redirect($returnto, get_string("everyoneisnowsubscribed", "cybrary"), 1);
break;
case CYBRARY_INITIALSUBSCRIBE : // 2
if ($cybrary->forcesubscribe <> CYBRARY_INITIALSUBSCRIBE) {
$users = \mod_cybrary\subscriptions::get_potential_subscribers($context, 0, 'u.id, u.email', '');
foreach ($users as $user) {
\mod_cybrary\subscriptions::subscribe_user($user->id, $cybrary, $context);
}
}
\mod_cybrary\subscriptions::set_subscription_mode($cybrary->id, CYBRARY_INITIALSUBSCRIBE);
redirect($returnto, get_string("everyoneisnowsubscribed", "cybrary"), 1);
break;
case CYBRARY_DISALLOWSUBSCRIBE : // 3
\mod_cybrary\subscriptions::set_subscription_mode($cybrary->id, CYBRARY_DISALLOWSUBSCRIBE);
redirect($returnto, get_string("noonecansubscribenow", "cybrary"), 1);
break;
default:
print_error(get_string('invalidforcesubscribe', 'cybrary'));
}
}
if (\mod_cybrary\subscriptions::is_forcesubscribed($cybrary)) {
redirect($returnto, get_string("everyoneisnowsubscribed", "cybrary"), 1);
}
$info = new stdClass();
$info->name = fullname($user);
$info->cybrary = format_string($cybrary->name);
if ($issubscribed) {
if (is_null($sesskey)) {
// We came here via link in email.
$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
echo $OUTPUT->header();
$viewurl = new moodle_url('/mod/cybrary/view.php', array('f' => $id));
if ($discussionid) {
$a = new stdClass();
$a->cybrary = format_string($cybrary->name);
$a->discussion = format_string($discussion->name);
echo $OUTPUT->confirm(get_string('confirmunsubscribediscussion', 'cybrary', $a),
$PAGE->url, $viewurl);
} else {
echo $OUTPUT->confirm(get_string('confirmunsubscribe', 'cybrary', format_string($cybrary->name)),
$PAGE->url, $viewurl);
}
echo $OUTPUT->footer();
exit;
}
require_sesskey();
if ($discussionid === null) {
if (\mod_cybrary\subscriptions::unsubscribe_user($user->id, $cybrary, $context, true)) {
redirect($returnto, get_string("nownotsubscribed", "cybrary", $info), 1);
} else {
print_error('cannotunsubscribe', 'cybrary', get_local_referer(false));
}
} else {
if (\mod_cybrary\subscriptions::unsubscribe_user_from_discussion($user->id, $discussion, $context)) {
$info->discussion = $discussion->name;
redirect($returnto, get_string("discussionnownotsubscribed", "cybrary", $info), 1);
} else {
print_error('cannotunsubscribe', 'cybrary', get_local_referer(false));
}
}
} else { // subscribe
if (\mod_cybrary\subscriptions::subscription_disabled($cybrary) && !has_capability('mod/cybrary:managesubscriptions', $context)) {
print_error('disallowsubscribe', 'cybrary', get_local_referer(false));
}
if (!has_capability('mod/cybrary:viewdiscussion', $context)) {
print_error('noviewdiscussionspermission', 'cybrary', get_local_referer(false));
}
if (is_null($sesskey)) {
// We came here via link in email.
$PAGE->set_title($course->shortname);
$PAGE->set_heading($course->fullname);
echo $OUTPUT->header();
$viewurl = new moodle_url('/mod/cybrary/view.php', array('f' => $id));
if ($discussionid) {
$a = new stdClass();
$a->cybrary = format_string($cybrary->name);
$a->discussion = format_string($discussion->name);
echo $OUTPUT->confirm(get_string('confirmsubscribediscussion', 'cybrary', $a),
$PAGE->url, $viewurl);
} else {
echo $OUTPUT->confirm(get_string('confirmsubscribe', 'cybrary', format_string($cybrary->name)),
$PAGE->url, $viewurl);
}
echo $OUTPUT->footer();
exit;
}
require_sesskey();
if ($discussionid == null) {
\mod_cybrary\subscriptions::subscribe_user($user->id, $cybrary, $context, true);
redirect($returnto, get_string("nowsubscribed", "cybrary", $info), 1);
} else {
$info->discussion = $discussion->name;
\mod_cybrary\subscriptions::subscribe_user_to_discussion($user->id, $discussion, $context);
redirect($returnto, get_string("discussionnowsubscribed", "cybrary", $info), 1);
}
}