Move error handler to error interceptor.

src/app/_services/auth.service.ts

@@ -6,8 +6,8 @@ import {LoggingService} from '@app/_services/logging.service';
 import {MutableKeyStore, MutablePgpKeyStore} from '@app/_pgp';
 import {ErrorDialogService} from '@app/_services/error-dialog.service';
 import {tap} from 'rxjs/operators';
-import { HttpClient, HttpErrorResponse } from '@angular/common/http';
-import {Observable, throwError} from 'rxjs';
+import { HttpClient } from '@angular/common/http';
+import {Observable } from 'rxjs';
 
 @Injectable({
   providedIn: 'root'
@@ -154,7 +154,7 @@ export class AuthService {
     return this.httpClient.get(`${environment.publicKeysUrl}`, {responseType: 'text'})
         .pipe(tap(
           data => { },
-          error => { this.handleError(error, 'Unable to load trusted public keys.'); }
+          error => { this.loggingService.sendErrorLevelMessage('Unable to load trusted public keys.', this, {error}); }
         ));
   }
 
@@ -163,20 +163,4 @@ export class AuthService {
       await this.mutableKeyStore.importPrivateKey(this.privateKey);
     }
   }
-
-  // TODO this is from the docs and for reference. Move it somewhere better.
-  private handleError(error: HttpErrorResponse, customMessage: string): Observable<any> {
-    if (error.error instanceof ErrorEvent) {
-      // A client-side or network error occurred. Handle it accordingly.
-      console.error('An error occurred:', error.error.message);
-    } else {
-      // The backend returned an unsuccessful response code.
-      // The response body may contain clues as to what went wrong.
-      console.error(
-        `Backend returned code ${error.status}, ` +
-        `body was: ${JSON.stringify(error.error)}`);
-    }
-    // Return an observable with a user-facing error message.
-    return throwError(customMessage);
-  }
 }