feat: add UpdateGroup handler to standalone IAM API

Mirror the embedded IAM UpdateGroup handler in the standalone IAM API
for parity.

weed/iamapi/iamapi_group_handlers.go

@@ -46,6 +46,26 @@ func (iama *IamApiServer) DeleteGroup(s3cfg *iam_pb.S3ApiConfiguration, values u
 	return resp, &IamError{Code: iam.ErrCodeNoSuchEntityException, Error: fmt.Errorf("group %s does not exist", groupName)}
 }
 
+func (iama *IamApiServer) UpdateGroup(s3cfg *iam_pb.S3ApiConfiguration, values url.Values) (*UpdateGroupResponse, *IamError) {
+	resp := &UpdateGroupResponse{}
+	groupName := values.Get("GroupName")
+	if groupName == "" {
+		return resp, &IamError{Code: iam.ErrCodeInvalidInputException, Error: fmt.Errorf("GroupName is required")}
+	}
+	for _, g := range s3cfg.Groups {
+		if g.Name == groupName {
+			if disabled := values.Get("Disabled"); disabled != "" {
+				g.Disabled = disabled == "true"
+			}
+			if newName := values.Get("NewGroupName"); newName != "" {
+				g.Name = newName
+			}
+			return resp, nil
+		}
+	}
+	return resp, &IamError{Code: iam.ErrCodeNoSuchEntityException, Error: fmt.Errorf("group %s does not exist", groupName)}
+}
+
 func (iama *IamApiServer) GetGroup(s3cfg *iam_pb.S3ApiConfiguration, values url.Values) (*GetGroupResponse, *IamError) {
 	resp := &GetGroupResponse{}
 	groupName := values.Get("GroupName")

weed/iamapi/iamapi_management_handlers.go

@@ -1105,6 +1105,13 @@ func (iama *IamApiServer) DoActions(w http.ResponseWriter, r *http.Request) {
 			writeIamErrorResponse(w, r, reqID, err)
 			return
 		}
+	case "UpdateGroup":
+		var err *IamError
+		response, err = iama.UpdateGroup(s3cfg, values)
+		if err != nil {
+			writeIamErrorResponse(w, r, reqID, err)
+			return
+		}
 	case "GetGroup":
 		var err *IamError
 		response, err = iama.GetGroup(s3cfg, values)

weed/iamapi/iamapi_response.go

@@ -39,6 +39,7 @@ type (
 	// Group response types
 	CreateGroupResponse               = iamlib.CreateGroupResponse
 	DeleteGroupResponse               = iamlib.DeleteGroupResponse
+	UpdateGroupResponse               = iamlib.UpdateGroupResponse
 	GetGroupResponse                  = iamlib.GetGroupResponse
 	ListGroupsResponse                = iamlib.ListGroupsResponse
 	AddUserToGroupResponse            = iamlib.AddUserToGroupResponse