import {Injectable} from '@angular/core';
  import {BehaviorSubject, Observable} from 'rxjs';
  import {Vessel} from '../model/vessel';
  
  @Injectable({
    providedIn: 'root'
  })
  export class VesselsService {
    private vessels = new BehaviorSubject(new Map());
    currentVessels = this.vessels.asObservable();
  
    constructor() {
    }
  
    changeVesselsSet(newVessels: Map<number, Vessel>): void {
      this.vessels.next(newVessels);
    }
  }