import {forwardRef, Inject, Injectable, Injector} from '@angular/core';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/mergeMap';
import 'rxjs/add/observable/throw';
import {HttpErrorResponse, HttpEvent, HttpHandler, HttpInterceptor, HttpRequest, HttpResponse} from "@angular/common/http";
import {Observable} from "rxjs/Observable";

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

  constructor(@Inject(forwardRef(() => Injector)) private injector: Injector) {

  }

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

    return next.handle(request).map((event: HttpEvent<any>) => {
      if (event instanceof HttpResponse) {
        return event;
      }
    }).catch((err: any) => {
      if (err instanceof HttpErrorResponse) {
        console.log(`error ${err.status}`);

        if (err.status === 401 || err.status === 412 || err.status === 417 || err.status === 403) {

        }

        return Observable.throw(err);
      }
    });
  }
}