solid-3-abstract-list-service.ts

import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { ApiService } from '../api.service';
import { StoreService } from '../store.service';
import { PaginationModel } from '../../models/pagination.model';
import { ListLevel } from '../../models/list-level.enum';
import { AuthorModel } from '../../models/author.model';
import { ArticleModel } from '../../models/article.model';

export type ListType = AuthorModel[] | ArticleModel[];

@Injectable()
export abstract class ListService {
  public listLevel$: Observable<ListLevel>;
  public nbArticles$: Observable<number>;
  public pagination$: Observable<PaginationModel>;
  public topic$: Observable<string>;

  abstract listTitle: string;
  abstract showNbOfArticlesDropdown: boolean;

  constructor(
    protected apiService: ApiService,
    protected storeService: StoreService
  ) {
    this.listLevel$ = this.storeService.select('listLevel');
    this.nbArticles$ = this.storeService.select('nbOfArticles');
    this.pagination$ = this.storeService.select('pagination');
    this.topic$ = this.storeService.select('topic');
  }

  abstract getList(): Observable<ListType>;
}