Proyectos de Subversion Moodle

<?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 forum or manage forum subscription mode

 *

 * This script can be used by either individual users to subscribe to or

 * unsubscribe from a forum (no 'mode' param provided), or by forum 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_forum

 * @copyright  1999 onwards Martin Dougiamas  {@link http://moodle.com}

 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

require(__DIR__.'/../../config.php');

require_once($CFG->dirroot.'/mod/forum/lib.php');

$id             = required_param('id', PARAM_INT);             // The forum to set subscription on.

$mode           = optional_param('mode', null, PARAM_INT);     // The forum'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_LOCALURL);

$edit           = optional_param('edit', 'off', PARAM_ALPHANUM);

$url = new moodle_url('/mod/forum/subscribe.php', array('id'=>$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);

    if (!$discussion = $DB->get_record('forum_discussions', array('id' => $discussionid, 'forum' => $id))) {

        throw new \moodle_exception('invaliddiscussionid', 'forum');

    }

}

$PAGE->set_url($url);

$forum   = $DB->get_record('forum', array('id' => $id), '*', MUST_EXIST);

$course  = $DB->get_record('course', array('id' => $forum->course), '*', MUST_EXIST);

$cm      = get_coursemodule_from_instance('forum', $forum->id, $course->id, false, MUST_EXIST);

$context = context_module::instance($cm->id);

if ($user) {

    require_sesskey();

    if (!has_capability('mod/forum:managesubscriptions', $context)) {

        throw new \moodle_exception('nopermissiontosubscribe', 'forum');

    }

    $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;

}

$issubscribed = \mod_forum\subscriptions::is_subscribed($user->id, $forum, $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)) {

        throw new \moodle_exception('cannotsubscribe', 'forum');

    }

}

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', 'forum').'<br /><br />'.get_string('liketologin'),

                     get_login_url(), new moodle_url('/mod/forum/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/forum/view.php', array('f'=>$id)),

                get_string('subscribeenrolledonly', 'forum'),

                null,

                \core\output\notification::NOTIFY_ERROR

            );

    }

}

$returnto = optional_param('backtoindex',0,PARAM_INT)

    ? "index.php?id=".$course->id

    : "view.php?f=$id";

if ($returnurl) {

    $returnto = $returnurl;

}

$subscribersurl = new moodle_url('/mod/forum/subscribers.php', ['id' => $id, 'edit' => $edit]);

if (!is_null($mode) and has_capability('mod/forum:managesubscriptions', $context)) {

    require_sesskey();

    switch ($mode) {

        case FORUM_CHOOSESUBSCRIBE : // 0

            \mod_forum\subscriptions::set_subscription_mode($forum, FORUM_CHOOSESUBSCRIBE);

            redirect(

                    $subscribersurl,

                    get_string('everyonecannowchoose', 'forum'),

                    null,

                    \core\output\notification::NOTIFY_SUCCESS

            );

            break;

        case FORUM_FORCESUBSCRIBE : // 1

            \mod_forum\subscriptions::set_subscription_mode($forum, FORUM_FORCESUBSCRIBE);

            redirect(

                    $subscribersurl,

                    get_string('everyoneisnowsubscribed', 'forum'),

                    null,

                    \core\output\notification::NOTIFY_SUCCESS

            );

            break;

        case FORUM_INITIALSUBSCRIBE : // 2

            \mod_forum\subscriptions::set_subscription_mode($forum, FORUM_INITIALSUBSCRIBE);

            if ($forum->forcesubscribe <> FORUM_INITIALSUBSCRIBE) {

                // Reload the forum again to get the updated forcesubscribe field.

                $forum = $DB->get_record('forum', array('id' => $id), '*', MUST_EXIST);

                $users = \mod_forum\subscriptions::get_potential_subscribers($context, 0, 'u.id, u.email', '');

                foreach ($users as $user) {

                    \mod_forum\subscriptions::subscribe_user($user->id, $forum, $context);

                }

            }

            redirect(

                    $subscribersurl,

                    get_string('everyoneisnowsubscribed', 'forum'),

                    null,

                    \core\output\notification::NOTIFY_SUCCESS

            );

            break;

        case FORUM_DISALLOWSUBSCRIBE : // 3

            \mod_forum\subscriptions::set_subscription_mode($forum, FORUM_DISALLOWSUBSCRIBE);

            redirect(

                    $subscribersurl,

                    get_string('noonecansubscribenow', 'forum'),

                    null,

                    \core\output\notification::NOTIFY_SUCCESS

            );

            break;

        default:

            throw new \moodle_exception(get_string('invalidforcesubscribe', 'forum'));

    }

}

if (\mod_forum\subscriptions::is_forcesubscribed($forum)) {

    $subscribersurl->param('notification', 'everyoneisnowsubscribed');

    redirect($subscribersurl);

}

$info = new stdClass();

$info->name  = fullname($user);

$info->forum = format_string($forum->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/forum/view.php', array('f' => $id));

        if ($discussionid) {

            $a = new stdClass();

            $a->forum = format_string($forum->name);

            $a->discussion = format_string($discussion->name);

            echo $OUTPUT->confirm(get_string('confirmunsubscribediscussion', 'forum', $a),

                    $PAGE->url, $viewurl);

        } else {

            echo $OUTPUT->confirm(get_string('confirmunsubscribe', 'forum', format_string($forum->name)),

                    $PAGE->url, $viewurl);

        }

        echo $OUTPUT->footer();

        exit;

    }

    require_sesskey();

    if ($discussionid === null) {

        if (\mod_forum\subscriptions::unsubscribe_user($user->id, $forum, $context, true)) {

            redirect(

                $returnto,

                get_string('nownotsubscribed', 'forum', $info),

                null,

                \core\output\notification::NOTIFY_SUCCESS

            );

        } else {

            throw new \moodle_exception('cannotunsubscribe', 'forum', get_local_referer(false));

        }

    } else {

        if (\mod_forum\subscriptions::unsubscribe_user_from_discussion($user->id, $discussion, $context)) {

            $info->discussion = $discussion->name;

            redirect(

                $returnto,

                get_string('discussionnownotsubscribed', 'forum', $info),

                null,

                \core\output\notification::NOTIFY_SUCCESS

            );

        } else {

            throw new \moodle_exception('cannotunsubscribe', 'forum', get_local_referer(false));

        }

    }

} else {  // subscribe

    if (\mod_forum\subscriptions::subscription_disabled($forum) && !has_capability('mod/forum:managesubscriptions', $context)) {

        throw new \moodle_exception('disallowsubscribe', 'forum', get_local_referer(false));

    }

    if (!has_capability('mod/forum:viewdiscussion', $context)) {

        throw new \moodle_exception('noviewdiscussionspermission', 'forum', 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/forum/view.php', array('f' => $id));

        if ($discussionid) {

            $a = new stdClass();

            $a->forum = format_string($forum->name);

            $a->discussion = format_string($discussion->name);

            echo $OUTPUT->confirm(get_string('confirmsubscribediscussion', 'forum', $a),

                    $PAGE->url, $viewurl);

        } else {

            echo $OUTPUT->confirm(get_string('confirmsubscribe', 'forum', format_string($forum->name)),

                    $PAGE->url, $viewurl);

        }

        echo $OUTPUT->footer();

        exit;

    }

    require_sesskey();

    if ($discussionid == null) {

        \mod_forum\subscriptions::subscribe_user($user->id, $forum, $context, true);

        redirect(

            $returnto,

            get_string('nowsubscribed', 'forum', $info),

            null,

            \core\output\notification::NOTIFY_SUCCESS

        );

    } else {

        $info->discussion = $discussion->name;

        \mod_forum\subscriptions::subscribe_user_to_discussion($user->id, $discussion, $context);

        redirect(

            $returnto,

            get_string('discussionnowsubscribed', 'forum', $info),

            null,

            \core\output\notification::NOTIFY_SUCCESS

        );

    }

}