объединение двух angular сервисов для доступа к определенной коллекции c в firebase

Question

Привет, мне было интересно, можно ли было объединить две службы angular для CRUD определенной коллекции c внутри коллекции. У меня есть домашнее приложение, в котором дом относится к этому пользователю. внутри дома один из компонентов - тодолист. У меня уже есть служба для дома, которая выполняет CRUD для домов. Для тодолиста я создала службу, но меня удивляет, как я собираюсь получить доступ к дому, указанному c для пользователя. Я приложил свой код в минуту ниже, и любые рекомендации будут полезны для меня, чтобы помочь в этой работе. Тодосервис

import { Injectable } from '@angular/core';
    import { promise } from 'protractor';
    import { DocumentReference, AngularFirestore, AngularFirestoreCollection } from '@angular/fire/firestore';
    import { HouseService, House } from './house.service';
    import { Observable } from 'rxjs';
    import { map } from 'rxjs/operators';
    import {Todolist} from '../modal/Todolist';





    @Injectable({
    providedIn: 'root'
    })
    export class TodoserviceService {
      private houses: Observable<House[]>;
      private houseCollection: AngularFirestoreCollection<House>;
      private todolist: Observable<Todolist[]>;
      private todolistCollection: AngularFirestoreCollection<Todolist>;

      constructor(houseService : HouseService,
        private afs: AngularFirestore) {
          this.houseCollection = this.afs.collection<House>('house');
          this.houses = this.houseCollection.snapshotChanges().pipe(
            map(actions => {
              return actions.map(a => {
                const data = a.payload.doc.data();
                const id = a.payload.doc.id;
                return { id, ...data };
              });
            })
          );
         }


     //Function to retrieve all collection data for house

     getAllTodolist(id : string){
      this.todolistCollection = this.afs.collection('house').doc(id).collection<Todolist>('todo list');
      this.todolist = this.todolistCollection.snapshotChanges().pipe(
        map(actions => {
         return actions.map(a => {
           const data = a.payload.doc.data();
           return { id, ...data};
          });
        })
      );
     return this.todolist;
   }

    gettodolist(): Observable<Todolist[]>{
      return this.todolist

    }

    gettodo(id){
        return this.houseCollection.doc(id).collection<Todolist>(id).valueChanges();
    }



        //
    //HAVING .COLLECTION('todo').ADD - IF THERE IS NO COLLECTION IT WILL CREATE ONE, IF THERE IS IT WILL ADD TO IT
    addTodolist(id: any, todolist: Todolist  ): Promise<DocumentReference>{
      return this.houseCollection.doc(id).collection('todo list').add(todolist);
    }


    updateTodolist(id: any, todolist: Todolist): Promise<void>{
      return this.houseCollection.doc(id).collection<Todolist>("todo list").doc(id).update({title: todolist.title, description: todolist.description, last_date: todolist.last_date });

    }

    deleteTodolist(id: any): Promise<void> {
      return this.houseCollection.doc(id).collection<Todolist>("todo list").doc(id).delete();
    }

  }

Addtodo.ts

import { Component, OnInit } from '@angular/core';
import { NavController } from '@ionic/angular';
import { ToastController } from '@ionic/angular';
import { House, HouseService } from '../Services/house.service';
import { ActivatedRoute, Route, Router } from '@angular/router';
import { TodoserviceService } from '../Services/todoservice.service';
import { AngularFirestore } from '@angular/fire/firestore';
import { map } from 'rxjs/operators';
import { Todolist } from '../modal/Todolist';
import { Observable } from 'rxjs';

@Component({
  selector: 'app-add-todo',
  templateUrl: './add-todo.page.html',
  styleUrls: ['./add-todo.page.scss'],
})



export class AddTodoPage implements OnInit {
  todolist: Todolist = {
    title: '',
    description: '',
    last_date: '',
  }

  currentHouse: House;
  currentHouseId: string;

  constructor(private activatedRoute: ActivatedRoute,
    private router: Router,
    private route: Router, private navCtrl: NavController,
    private toastCtrl: ToastController, private todoserviceService: TodoserviceService,
    private houseService: HouseService) {

  }
  ngOnInit() {

    let id1 = this.route.url.split('id=');
    let id2 = id1[1].toString();
    let id3 = id2.split('/');
    let id = id3[0].toString();
    this.houseService.getHouse(id);
    if (id) {
      this.houseService.getHouse(id).subscribe(house => {
        this.currentHouse = house;
        this.currentHouseId = id;
      });
      console.log(this.currentHouseId)
    }
  }



  addTodolist() {
    this.todoserviceService.addTodolist(this.currentHouseId, this.todolist).then(() => {
      this.router.navigateByUrl('/');
    }, err => {

    });
  }
}

HouseService

 import { Injectable } from '@angular/core';
import * as firebase from 'firebase/app';

import { map, take } from 'rxjs/operators';
import { Observable } from 'rxjs';

import 'firebase/auth';
import 'firebase/firestore';
import { AngularFirestoreCollection, AngularFirestore, DocumentReference } from '@angular/fire/firestore';
import { THIS_EXPR } from '@angular/compiler/src/output/output_ast';
import { promise } from 'protractor';

//Interface for new house object. It will be created with all of these elements
export interface House {
  id?: string,
  name: string,
  address: string,
  eircode: string,
  members: string[]
}


@Injectable({
  providedIn: 'root'
})
export class HouseService {

  //Initialise necessary objects to store results from Firebase DB
  private houses: Observable<House[]>;
  private houseCollection: AngularFirestoreCollection<House>;

  //Initialise firebase and get collection from DB
  constructor(private afs: AngularFirestore) {
    this.houseCollection = this.afs.collection<House>('house');
    this.houses = this.houseCollection.snapshotChanges().pipe(
      map(actions => {
        return actions.map(a => {
          const data = a.payload.doc.data();
          const id = a.payload.doc.id;
          return { id, ...data };
        });
      })
    );
  }

  //***HOUSE FUNCTIONS */
  //Get all houses from DB
  getHouses(): Observable<House[]> {
    return this.houses;
  }
  //Get singular house from DB using ID
  getHouse(id: string): Observable<House> {
    return this.houseCollection.doc<House>(id).valueChanges().pipe(
      take(1), //takes one observable as there is no need to keep constantly updated
      map(house => {
        house.id;
        return house
      })
    );
  }
  //Add house object to DB
  addHouse(house: House): Promise<DocumentReference> {
   return this.houseCollection.add(house);
  }
  //Update main attribues of house object in DB
  updateHouse(house: House): Promise<void> {
    return this.houseCollection.doc(house.id).update({ name:house.name, address:house.address, eircode:house.eircode, members:house.members});
  }
  //Delete house from DB
  deleteHouse(id: string): Promise<void> {
    return this.houseCollection.doc(id).delete();
  }

}