sprinklers3/client/state/UserStore.ts

import { ISprinklersDevice, IUser } from "@common/httpApi";
import { action, observable } from "mobx";

export class UserStore {
  @observable
  userData: IUser | null = null;

  @action.bound
  receiveUserData(userData: IUser) {
    this.userData = userData;
  }

  findDevice(id: number): ISprinklersDevice | null {
    return (
      (this.userData &&
        this.userData.devices &&
        this.userData.devices.find(dev => dev.id === id)) ||
      null
    );
  }
}