RocketChat/Rocket.Chat

import type { IMessage } from '@rocket.chat/core-typings';
import type { ServerMethods } from '@rocket.chat/ddp-client';
import { Messages, Rooms } from '@rocket.chat/models';
import { Meteor } from 'meteor/meteor';

import { callbacks } from '../../../../lib/callbacks';
import { canAccessRoomAsync } from '../../../authorization/server';
import { settings } from '../../../settings/server';
import { readThread } from '../functions';

declare module '@rocket.chat/ddp-client' {
    // eslint-disable-next-line @typescript-eslint/naming-convention
    interface ServerMethods {
        getThreadMessages(params: { tmid: IMessage['_id']; limit?: number; skip?: number }): Promise<IMessage[]>;
    }
}

const MAX_LIMIT = 100;

Meteor.methods<ServerMethods>({
    async getThreadMessages({ tmid, limit, skip }) {
        if ((limit ?? 0) > MAX_LIMIT) {
            throw new Meteor.Error('error-not-allowed', `max limit: ${MAX_LIMIT}`, {
                method: 'getThreadMessages',
            });
        }

        if (!Meteor.userId() || !settings.get('Threads_enabled')) {
            throw new Meteor.Error('error-not-allowed', 'Threads Disabled', {
                method: 'getThreadMessages',
            });
        }

        const thread = await Messages.findOneById(tmid);
        if (!thread) {
            return [];
        }

        const user = await Meteor.userAsync();
        const room = await Rooms.findOneById(thread.rid);

        if (!user || !room || !(await canAccessRoomAsync(room, user))) {
            throw new Meteor.Error('error-not-allowed', 'Not allowed', { method: 'getThreadMessages' });
        }

        if (!thread.tcount) {
            return [];
        }

        await callbacks.run('beforeReadMessages', thread.rid, user._id);
        await readThread({ userId: user._id, rid: thread.rid, tmid });

        const result = await Messages.findVisibleThreadByThreadId(tmid, {
            ...(skip && { skip }),
            ...(limit && { limit }),
            sort: { ts: -1 },
        }).toArray();
        callbacks.runAsync('afterReadMessages', room._id, { uid: user._id, tmid });

        return [thread, ...result];
    },
});