mashafrancis/butternut-user

import { Injectable } from '@nestjs/common';
import { DateTime } from 'luxon';
import { UserEntity } from './entity';
import { UserService } from './user.service';

@Injectable()
export class OnlineService {
    private online = new Map<string, UserEntity>();

    constructor(private readonly userService: UserService) {}

    public isOnline(user: UserEntity): boolean {
        return this.online.has(user.id.toString());
    }

    public isOffline({ id }: UserEntity): boolean {
        return !this.online.has(id.toString());
    }

    public async addUser(user: UserEntity): Promise<OnlineService> {
        user.onlineAt = DateTime.utc();
        await this.userService.update(user);
        this.online.set(user.id.toString(), user);
        return this;
    }

    public async removeUser(user: UserEntity): Promise<OnlineService> {
        user.onlineAt = DateTime.utc();
        await this.userService.update(user);
        this.online.delete(user.id.toString());
        return this;
    }
}