Error service updates

src/lib/error/error.service.ts

@@ -2,21 +2,20 @@ import { Injectable } from '@angular/core';
 import { BehaviorSubject, Observable } from 'rxjs';
 import { HttpErrorResponse } from '@angular/common/http';
 import { LoadingService } from '../loading';
-
-export type Error = HttpErrorResponse | null;
+import { map } from 'rxjs/operators';
 
 @Injectable({ providedIn: 'root' })
 export class ErrorService {
-    readonly hasError$: Observable<Error>;
-    private readonly _errorEvent$ = new BehaviorSubject<Error>(null);
+    readonly hasError$: Observable<boolean>;
+    private readonly _errorEvent$ = new BehaviorSubject<HttpErrorResponse | undefined>(undefined);
 
     constructor(private readonly _loadingService: LoadingService) {
-        this.hasError$ = this._errorEvent$.asObservable();
+        this.hasError$ = this._errorEvent$.asObservable().pipe(map(e => !!e));
     }
 
-    private _error: Error = null;
+    private _error?: HttpErrorResponse;
 
-    get error(): Error {
+    get error(): HttpErrorResponse | undefined {
         return this._error;
     }
 
@@ -27,7 +26,7 @@ export class ErrorService {
     }
 
     clear(): void {
-        this._errorEvent$.next(null);
-        this._error = null;
+        this._errorEvent$.next(undefined);
+        this._error = undefined;
     }
 }