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1fcf0ca8a5
dirname() is a slow function compared with __DIR__ and using '/../'. Moodle has a large number of legacy files that are included each time a page loads and is not able to use an autoloader as it is functional code. This allows those required includes to perform as best as possible in this situation.
71 lines
2.9 KiB
PHP
71 lines
2.9 KiB
PHP
<?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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