feat(purchasae): added team with category parent and central

internal/validator/purchase_order_validator.go

@@ -76,6 +76,10 @@ func (v *PurchaseOrderValidatorImpl) ValidateCreatePurchaseOrderRequest(req *con
 		}
 	}
 
+	if err, code := validatePurchaseTeamSelection(req.TeamScope, req.TeamCategoryID, false); err != nil {
+		return err, code
+	}
+
 	if len(req.Items) == 0 {
 		return errors.New("at least one item is required"), constants.MissingFieldErrorCode
 	}
@@ -139,6 +143,10 @@ func (v *PurchaseOrderValidatorImpl) ValidateUpdatePurchaseOrderRequest(req *con
 		}
 	}
 
+	if err, code := validatePurchaseTeamSelection(req.TeamScope, req.TeamCategoryID, true); err != nil {
+		return err, code
+	}
+
 	// Validate items if provided
 	if req.Items != nil {
 		for i, item := range req.Items {
@@ -151,6 +159,40 @@ func (v *PurchaseOrderValidatorImpl) ValidateUpdatePurchaseOrderRequest(req *con
 	return nil, ""
 }
 
+// validatePurchaseTeamSelection keeps team_scope and team_category_id in step with
+// the database check constraint: a category team needs a category, Pusat must not
+// carry one. allowClear lets an update send an empty scope to drop the team.
+func validatePurchaseTeamSelection(scope *string, categoryID *uuid.UUID, allowClear bool) (error, string) {
+	if scope == nil {
+		if categoryID != nil {
+			return errors.New("team_scope is required when team_category_id is provided"), constants.MissingFieldErrorCode
+		}
+		return nil, ""
+	}
+
+	switch strings.TrimSpace(*scope) {
+	case "":
+		if !allowClear {
+			return errors.New("team_scope must be one of: category, central"), constants.MalformedFieldErrorCode
+		}
+		if categoryID != nil {
+			return errors.New("team_category_id must be empty when clearing the team"), constants.MalformedFieldErrorCode
+		}
+	case constants.PurchaseTeamScopeCategory:
+		if categoryID == nil || *categoryID == uuid.Nil {
+			return errors.New("team_category_id is required when team_scope is category"), constants.MissingFieldErrorCode
+		}
+	case constants.PurchaseTeamScopeCentral:
+		if categoryID != nil {
+			return errors.New("team_category_id must be empty when team_scope is central"), constants.MalformedFieldErrorCode
+		}
+	default:
+		return errors.New("team_scope must be one of: category, central"), constants.MalformedFieldErrorCode
+	}
+
+	return nil, ""
+}
+
 func (v *PurchaseOrderValidatorImpl) ValidateListPurchaseOrdersRequest(req *contract.ListPurchaseOrdersRequest) (error, string) {
 	if req == nil {
 		return errors.New("request body is required"), constants.MissingFieldErrorCode
@@ -171,6 +213,21 @@ func (v *PurchaseOrderValidatorImpl) ValidateListPurchaseOrdersRequest(req *cont
 		}
 	}
 
+	if req.TeamScope != "" {
+		validScopes := []string{constants.PurchaseTeamScopeCategory, constants.PurchaseTeamScopeCentral}
+		if !contains(validScopes, req.TeamScope) {
+			return errors.New("team_scope must be one of: category, central"), constants.MalformedFieldErrorCode
+		}
+
+		if req.TeamScope == constants.PurchaseTeamScopeCentral && req.TeamCategoryID != nil {
+			return errors.New("team_category_id must be empty when team_scope is central"), constants.MalformedFieldErrorCode
+		}
+	}
+
+	if req.TeamCategoryID != nil && *req.TeamCategoryID == uuid.Nil {
+		return errors.New("team_category_id cannot be empty"), constants.MalformedFieldErrorCode
+	}
+
 	if req.StartDate != nil && req.EndDate != nil {
 		if req.EndDate.Before(*req.StartDate) {
 			return errors.New("end_date must be after start_date"), constants.MalformedFieldErrorCode