h-usersite/angular/src/app/interceptors/customer-info.interceptor.ts

import { Injectable } from '@angular/core';
import {
  HttpRequest,
  HttpHandler,
  HttpEvent,
  HttpInterceptor,
  HttpResponse,
  HttpErrorResponse,
} from '@angular/common/http';
import { Observable, tap } from 'rxjs';
import { MatSnackBar } from '@angular/material/snack-bar';

@Injectable()
export class CustomerInfoInterceptor implements HttpInterceptor {
  constructor(private _snackBar: MatSnackBar) {}

  intercept(
    request: HttpRequest<unknown>,
    next: HttpHandler
  ): Observable<HttpEvent<unknown>> {
    return next.handle(request).pipe(
      tap(
        (event) => {
          if (event instanceof HttpResponse) {
            const body = event.body as any;
            const url = new URL(event.url || '');
            if (url.pathname.includes('/icard-proxy/customer_info')) {
              if (
                body.customer_info?.errorCode === 'Customer_CustomerNotFound'
              ) {
                this._snackBar.open(
                  'Пользователь не найден в системе! Обратитесь к руководству',
                  'Ок'
                );
              } else if ('Error' in body) {
                this._snackBar.open('Произошла ошибка! Попробуйте снова', 'Ок');
              }
            }
          }
          if (event instanceof HttpErrorResponse) {
            this._snackBar.open('Произошла ошибка! Попробуйте снова', 'Ок');
          }
        },
        (err) => {
          console.error('ERROR FROM INTERCEPTOR: ', err);
        }
      )
    );
  }
}