Status HttpInterceptor

status.interceptor.ts

import 'rxjs/add/operator/do';
import {HttpErrorResponse, HttpEvent, HttpHandler, HttpInterceptor, HttpRequest, HttpResponse} from '@angular/common/http';
import {Injectable} from '@angular/core';
import {Observable} from 'rxjs/Observable';
import {Router} from '@angular/router';

@Injectable()
export class StatusInterceptor implements HttpInterceptor {
  constructor(private router: Router) {
  }

  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {

    return next.handle(request).do((event: HttpEvent<any>) => {
      if (event instanceof HttpResponse) {
        // Show success message
      }
    }, (err: any) => {
      if (err instanceof HttpErrorResponse) {
        this.loader.hideLoader();
        switch(err.status){
          case 401:
             this.auth.logout();
             this.router.navigate(['/']);
          break;
          case 403:
            this.router.navigate(['/become-member']);
          case 404:
             this.router.navigate(['/not-found']);
          break;
          default:
            break;
        }
       // Show error message
      }
    });
  }
}