pkg/web_api/submissions.go

@@ -32,6 +32,7 @@ var (
 	ErrReleaseNoUploadedAssetID = errors.New("Only submissions with a UploadedAssetID can be released")
 	ErrAcceptOwnSubmission = fmt.Errorf("%w: You cannot accept your own submission as the submitter", ErrPermissionDenied)
 	ErrCreateSubmissionRateLimit = errors.New("You must not create more than 5 submissions every 10 minutes")
+	ErrDisplayNameNotUnique = errors.New("Cannot submit: A map exists with the same DisplayName")
 )
 
 // POST /submissions
@@ -552,6 +553,24 @@ func (svc *Service) ActionSubmissionTriggerSubmit(ctx context.Context, params ap
 		}
 	}
 
+	// check for maps with the exact same name
+	filter := service.NewMapFilter()
+	filter.SetDisplayName(submission.DisplayName)
+	maps_list, err := svc.inner.ListMaps(
+		ctx,
+		filter,
+		model.Page{
+			Number: 1,
+			Size:   1,
+		},
+	)
+	if err != nil {
+		return err
+	}
+	if len(maps_list) != 0 {
+		return ErrDisplayNameNotUnique
+	}
+
 	// transaction
 	target_status := model.SubmissionStatusSubmitting
 	update := service.NewSubmissionUpdate()