[email] Add immediate response if email is in list

kibicara-frontend/src/app/core/auth/error.interceptor.ts

@@ -28,8 +28,6 @@ export class ErrorInterceptor implements HttpInterceptor {
     return next.handle(request).pipe(
       catchError((err: HttpErrorResponse) => {
         if (err.error instanceof ProgressEvent) {
-          // TODO Add spinner/overlay in app to prevent user input
-          console.log('Networkerror');
           this.snackBar.openFromComponent(OverlayComponent, {
             verticalPosition: 'top',
           });
@@ -42,8 +40,7 @@ export class ErrorInterceptor implements HttpInterceptor {
         } else if (err.status === 404) {
           this.router.navigate(['/404']);
         }
-        const error = err.error.message || err.statusText;
+        return throwError(err);
-        return throwError(error);
       })
     );
   }

kibicara-frontend/src/app/platforms/email/email-bot-card/email-bot-card.component.ts

@@ -58,13 +58,15 @@ export class EmailBotCardComponent implements OnInit {
           );
         },
         (error) => {
-          this.snackBar.open(
+          let errorMsg = 'Unknown error';
-            'Could not send e-mail to this address. Try again!',
+          if (error.status === 409) {
-            'Close',
+            errorMsg = 'E-Mail already in list.';
-            {
+          } else if (error.status === 502) {
-              duration: 2000,
+            errorMsg = 'Could not send e-mail to this address. Try again!';
-            }
+          }
-          );
+          this.snackBar.open(errorMsg, 'Close', {
+            duration: 2000,
+          });
         }
       );
   }

kibicara/platforms/email/webapi.py

@@ -196,6 +196,9 @@ async def email_subscribe(
         token,
     )
     try:
+        subs = await EmailSubscribers.objects.filter(email=subscriber.email).all()
+        if subs:
+            raise HTTPException(status_code=status.HTTP_409_CONFLICT)
         email.send_email(
             subscriber.email,
             "Subscribe to Kibicara " + hood.name,