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71 lines
2.9 KiB
71 lines
2.9 KiB
2 years ago
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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Subscribe to or unsubscribe from a forum discussion.
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*
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* @package mod_forum
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* @copyright 2014 Andrew Nicols <andrew@nicols.co.uk>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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define('AJAX_SCRIPT', true);
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require(__DIR__.'/../../config.php');
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require_once($CFG->dirroot . '/mod/forum/lib.php');
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$forumid = required_param('forumid', PARAM_INT); // The forum to subscribe or unsubscribe.
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$discussionid = optional_param('discussionid', null, PARAM_INT); // The discussionid to subscribe.
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$includetext = optional_param('includetext', false, PARAM_BOOL);
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$forum = $DB->get_record('forum', array('id' => $forumid), '*', MUST_EXIST);
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$course = $DB->get_record('course', array('id' => $forum->course), '*', MUST_EXIST);
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if (!$discussion = $DB->get_record('forum_discussions', array('id' => $discussionid, 'forum' => $forumid))) {
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print_error('invaliddiscussionid', 'forum');
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}
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$cm = get_coursemodule_from_instance('forum', $forum->id, $course->id, false, MUST_EXIST);
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$context = context_module::instance($cm->id);
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require_sesskey();
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require_login($course, false, $cm);
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require_capability('mod/forum:viewdiscussion', $context);
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$return = new stdClass();
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if (is_guest($context, $USER)) {
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// is_guest should be used here as this also checks whether the user is a guest in the current course.
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// Guests and visitors cannot subscribe - only enrolled users.
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throw new moodle_exception('noguestsubscribe', 'mod_forum');
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}
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if (!\mod_forum\subscriptions::is_subscribable($forum)) {
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// Nothing to do. We won't actually output any content here though.
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echo json_encode($return);
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die;
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}
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if (\mod_forum\subscriptions::is_subscribed($USER->id, $forum, $discussion->id, $cm)) {
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// The user is subscribed, unsubscribe them.
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\mod_forum\subscriptions::unsubscribe_user_from_discussion($USER->id, $discussion, $context);
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} else {
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// The user is unsubscribed, subscribe them.
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\mod_forum\subscriptions::subscribe_user_to_discussion($USER->id, $discussion, $context);
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}
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// Now return the updated subscription icon.
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$return->icon = forum_get_discussion_subscription_icon($forum, $discussion->id, null, $includetext);
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echo json_encode($return);
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die;
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