if ($forumto->type == 'single') {
     print_error('cannotmovetosingleforum', 'forum', $return);
 }
 // Get target forum cm and check it is visible to current user.
 $modinfo = get_fast_modinfo($course);
 $forums = $modinfo->get_instances_of('forum');
 if (!array_key_exists($forumto->id, $forums)) {
     print_error('cannotmovetonotfound', 'forum', $return);
 }
 $cmto = $forums[$forumto->id];
 if (!$cmto->uservisible) {
     print_error('cannotmovenotvisible', 'forum', $return);
 }
 $destinationctx = context_module::instance($cmto->id);
 require_capability('mod/forum:startdiscussion', $destinationctx);
 if (!forum_move_attachments($discussion, $forum->id, $forumto->id)) {
     echo $OUTPUT->notification("Errors occurred while moving attachment directories - check your file permissions");
 }
 $DB->set_field('forum_discussions', 'forum', $forumto->id, array('id' => $discussion->id));
 $DB->set_field('forum_read', 'forumid', $forumto->id, array('discussionid' => $discussion->id));
 $params = array('context' => $destinationctx, 'objectid' => $discussion->id, 'other' => array('fromforumid' => $forum->id, 'toforumid' => $forumto->id));
 $event = \mod_forum\event\discussion_moved::create($params);
 $event->add_record_snapshot('forum_discussions', $discussion);
 $event->add_record_snapshot('forum', $forum);
 $event->add_record_snapshot('forum', $forumto);
 $event->trigger();
 // Delete the RSS files for the 2 forums to force regeneration of the feeds
 require_once $CFG->dirroot . '/mod/forum/rsslib.php';
 forum_rss_delete_file($forum);
 forum_rss_delete_file($forumto);
 redirect($return . '&moved=-1&sesskey=' . sesskey());

$canviewdiscussion = has_capability('mod/forum:viewdiscussion', $modcontext);
if ($forum->type == "news") {
    if (!($USER->id == $discussion->userid || ($discussion->timestart == 0 || $discussion->timestart <= time()) && ($discussion->timeend == 0 || $discussion->timeend > time()))) {
        error('Discussion ID was incorrect or no longer exists', "{$CFG->wwwroot}/mod/forum/view.php?f={$forum->id}");
    }
}
if (!empty($move)) {
    if (!($sourceforum = get_record('forum', 'id', $fromforum))) {
        error('Cannot find which forum this discussion is being moved from');
    }
    if ($sourceforum->type == 'single') {
        error('Cannot move discussion from a simple single discussion forum');
    }
    require_capability('mod/forum:movediscussions', $modcontext);
    if ($forum = get_record("forum", "id", $move)) {
        if (!forum_move_attachments($discussion, $move)) {
            notify("Errors occurred while moving attachment directories - check your file permissions");
        }
        set_field("forum_discussions", "forum", $forum->id, "id", $discussion->id);
        $discussion->forum = $forum->id;
        if ($cm = get_coursemodule_from_instance("forum", $forum->id, $course->id)) {
            add_to_log($course->id, "forum", "move discussion", "discuss.php?d={$discussion->id}", "{$discussion->id}", $cm->id);
        } else {
            add_to_log($course->id, "forum", "move discussion", "discuss.php?d={$discussion->id}", "{$discussion->id}");
        }
        $discussionmoved = true;
        require_once 'rsslib.php';
        require_once $CFG->libdir . '/rsslib.php';
        // Delete the RSS files for the 2 forums because we want to force
        // the regeneration of the feeds since the discussions have been
        // moved.