src/app/services/http-response-interceptor.service.ts

import { Injectable } from '@angular/core';
import { Router } from '@angular/router';
import { MessageService, MessageDefines } from '../services/message.service';
import { BannerMessage } from '../common/banner-message';
import { SessionContext } from '../common/session-context';
import { BannerMessageStatusEn, ErrorType } from '../common/enums';

@Injectable()
export class HttpResponseInterceptorService {

  constructor(
    private messageService: MessageService,
    private router: Router,
    private sessionContext: SessionContext) { this.init(); }

  private init(): void {
    this.subscribeToMessageService();
  }

  private subscribeToMessageService() {
    this.messageService.errorOccured$.subscribe((errorMessage: BannerMessage) => {
      if ((errorMessage.errorType !== ErrorType.authentication)) {
        this.sessionContext.bannerMessage = errorMessage;

      } else {
        this.router.navigate(['logout']);
      }
    });
  }
}