MovieService with StatusCodeResponseService

movie.service.ts

import { Injectable, Optional } from '@angular/core';
import { Observable } from 'rxjs';
import { StatusCodeResponseService } from './status-code-response.service';
import { HttpClient, HttpErrorResponse } from '@angular/common/http';
import { environment } from '@env/environment';
import { Observable, throwError } from 'rxjs';
import { catchError } from 'rxjs/operators';

@Injectable({
  providedIn: 'root'
})
export class MovieService {
  constructor(@Optional() private statusCodeResponseService?: StatusCodeResponseService, private httpClient: HttpClient) {}

  getMovieById(id: string): Observable<Movie> {
    return this.httpClient.get<Movie>(environment.moviesBaseUrl).pipe(
      catchError((error) => {
        if (error instanceof HttpErrorResponse && error.statusCode === 404) {
          this.statusCodeResponseService?.setNotFound('Movie does not exist...yet!');
          return EMPTY;
        }

        return throwError(error);
      })
    );
  }
}