조직도 기능 추가

backend/internal/repository/tenant_repository.go

@@ -4,6 +4,7 @@ import (
 	"baron-sso-backend/internal/domain"
 	"context"
 	"strings"
+	"time"
 
 	"gorm.io/gorm"
 )
@@ -19,6 +20,7 @@ type TenantRepository interface {
 	AddDomain(ctx context.Context, tenantID string, domainName string, verified bool) error
 	List(ctx context.Context, limit, offset int, parentID string) ([]domain.Tenant, int64, error)
 	ListByType(ctx context.Context, tenantType string) ([]domain.Tenant, error)
+	DeleteBulk(ctx context.Context, ids []string) error
 }
 
 type tenantRepository struct {
@@ -121,3 +123,30 @@ func (r *tenantRepository) ListByType(ctx context.Context, tenantType string) ([
 	}
 	return tenants, nil
 }
+
+func (r *tenantRepository) DeleteBulk(ctx context.Context, ids []string) error {
+	if len(ids) == 0 {
+		return nil
+	}
+
+	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
+		// 1. Release slugs for all target tenants to allow reuse
+		suffix := "-deleted-" + time.Now().Format("20060102150405")
+		if err := tx.Model(&domain.Tenant{}).Where("id IN ?", ids).
+			Update("slug", gorm.Expr("slug || ?", suffix)).Error; err != nil {
+			return err
+		}
+
+		// 2. Soft delete tenants
+		if err := tx.Where("id IN ?", ids).Delete(&domain.Tenant{}).Error; err != nil {
+			return err
+		}
+
+		// 3. Also delete related UserGroups if any (Type USER_GROUP tenants have records in user_groups table)
+		if err := tx.Where("id IN ?", ids).Delete(&domain.UserGroup{}).Error; err != nil {
+			return err
+		}
+
+		return nil
+	})
+}