import { deserialize } from 'jsonapi-deserializer';
import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest, HttpResponse } from '@angular/common/http';
import { Observable } from 'rxjs/internal/Observable';
import { Injectable } from '@angular/core';
import { map } from 'rxjs/operators';

@Injectable()
export class ResponseInterceptor implements HttpInterceptor {

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

    return next.handle(req).pipe(map((event: HttpEvent<any>) => {
      if (event instanceof HttpResponse) {
        event = event.clone({ body: this.modifyBody(event) });
      }
      return event;
    }));

  }

  private modifyBody({ body: body, url: url }) {
    return body ? deserialize(body) : body;
  }
}