RocketChat/Rocket.Chat

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

import { canAccessRoomIdAsync } from '../../app/authorization/server/functions/canAccessRoom';

declare module '@rocket.chat/ddp-client' {
    // eslint-disable-next-line @typescript-eslint/naming-convention
    interface ServerMethods {
        loadMissedMessages(rid: IRoom['_id'], ts: Date): Promise<false | IMessage[]>;
    }
}

Meteor.methods<ServerMethods>({
    async loadMissedMessages(rid, start) {
        check(rid, String);
        check(start, Date);

        const fromId = Meteor.userId() ?? undefined;

        if (!rid) {
            throw new Meteor.Error('error-invalid-room', 'Invalid room', { method: 'getUsersOfRoom' });
        }

        if (!(await canAccessRoomIdAsync(rid, fromId))) {
            return false;
        }

        return Messages.findVisibleByRoomIdAfterTimestamp(rid, start, {
            sort: {
                ts: -1,
            },
        }).toArray();
    },
});