time-store.ts

import { ITimer } from './timer';

interface ITimerStore {
  getTimerById(id: string): ITimer | null;
  addTimer(id: string, timer: ITimer): void;
}

class TimerStore implements ITimerStore {
  private timers: Map<string, ITimer>;

  public constructor() {
    this.timers = new Map<string, ITimer>();
  }

  public getTimerById(id: string): ITimer | null {
    const timer = this.timers.get(id);

    return timer || null;
  }

  public addTimer(id: string, timer: ITimer): void {
    if (this.timers.has(id)) {
      throw new Error(`Timer with id ${id} was created already.`);
    }

    this.timers.set(id, timer);
  }
}

export { ITimerStore, TimerStore };