RocketChat/Rocket.Chat

import { Meteor } from 'meteor/meteor';
import { Tracker } from 'meteor/tracker';

import { roomCoordinator } from '../../../../client/lib/rooms/roomCoordinator';
import { messageArgs } from '../../../../client/lib/utils/messageArgs';
import { router } from '../../../../client/providers/RouterProvider';
import { settings } from '../../../settings/client';
import { MessageAction } from '../../../ui-utils/client';

Meteor.startup(() => {
    Tracker.autorun(() => {
        if (!settings.get('Threads_enabled')) {
            return MessageAction.removeButton('reply-in-thread');
        }
        MessageAction.addButton({
            id: 'reply-in-thread',
            icon: 'thread',
            label: 'Reply_in_thread',
            context: ['message', 'message-mobile', 'federated', 'videoconf'],
            action(e, props) {
                const { message = messageArgs(this).msg } = props;
                e?.stopPropagation();
                router.navigate({
                    name: router.getRouteName()!,
                    params: {
                        ...router.getRouteParameters(),
                        tab: 'thread',
                        context: message.tmid || message._id,
                    },
                });
            },
            condition({ subscription, room }) {
                const isLivechatRoom = roomCoordinator.isLivechatRoom(room.t);
                if (isLivechatRoom) {
                    return false;
                }
                return Boolean(subscription);
            },
            order: -1,
            group: 'message',
        });
    });
});