feat(GODT-2295): notifications for IMAP login when signed out.

internal/frontend/grpc/bridge.proto

@@ -448,7 +448,8 @@ message UserEvent {
     UserDisconnectedEvent userDisconnected = 2;
     UserChangedEvent userChanged = 3;
     UserBadEvent userBadEvent = 4;
-    UsedBytesChangedEvent  usedBytesChangedEvent= 5;
+    UsedBytesChangedEvent  usedBytesChangedEvent = 5;
+    ImapLoginFailedEvent imapLoginFailedEvent = 6;
   }
 }
 
@@ -474,6 +475,10 @@ message UsedBytesChangedEvent {
   int64 usedBytes = 2;
 }
 
+message ImapLoginFailedEvent {
+  string username = 1;
+}
+
 //**********************************************************
 // Generic errors
 //**********************************************************

internal/frontend/grpc/event_factory.go

@@ -181,6 +181,10 @@ func NewUsedBytesChangedEvent(userID string, usedBytes int) *StreamEvent {
 	return userEvent(&UserEvent{Event: &UserEvent_UsedBytesChangedEvent{UsedBytesChangedEvent: &UsedBytesChangedEvent{UserID: userID, UsedBytes: int64(usedBytes)}}})
 }
 
+func newIMAPLoginFailedEvent(username string) *StreamEvent {
+	return userEvent(&UserEvent{Event: &UserEvent_ImapLoginFailedEvent{ImapLoginFailedEvent: &ImapLoginFailedEvent{Username: username}}})
+}
+
 func NewGenericErrorEvent(errorCode ErrorCode) *StreamEvent {
 	return genericErrorEvent(&GenericErrorEvent{Code: errorCode})
 }

internal/frontend/grpc/service.go

@@ -309,6 +309,9 @@ func (s *Service) watchEvents() {
 		case events.UsedSpaceChanged:
 			_ = s.SendEvent(NewUsedBytesChangedEvent(event.UserID, event.UsedSpace))
 
+		case events.IMAPLoginFailed:
+			_ = s.SendEvent(newIMAPLoginFailedEvent(event.Username))
+
 		case events.UserDeauth:
 			// This is the event the GUI cares about.
 			_ = s.SendEvent(NewUserChangedEvent(event.UserID))