Refactor US Tariff Fractions service to use async for get_all method and add USTariffFractionMapper for response mapping

backend/api/v1/modules/a76/general_catalogs/fractions/us_tariff_fractions/routes.py

@@ -54,8 +54,7 @@ async def list_us_tariff_fractions(
     if search:
         filters["search"] = search
     
-    # Updated to sync call
-    items, total = USTariffFractionService.get_all(
+    items, total = await USTariffFractionService.get_all(
         db, tenant_id, company_id, skip, page_size, filters
     )
     

backend/api/v1/modules/a76/general_catalogs/fractions/us_tariff_fractions/service.py

@@ -1,4 +1,5 @@
 from typing import List, Optional, Tuple, Dict, Any
+from datetime import datetime
 from sqlalchemy.orm import Session
 from sqlalchemy.exc import IntegrityError
 from fastapi import HTTPException
@@ -7,15 +8,49 @@ from decimal import Decimal
 
 from .models import USTariffFraction
 from .dto import USTariffFractionCreateDTO, USTariffFractionUpdateDTO
+from api.v1.modules.sitar.fracciones_usa.service import FraccionesUSAService
 
 logger = logging.getLogger(__name__)
 
 
+class USTariffFractionMapper:
+    """Maps Sitar FraccionesUSAResponse objects to USTariffFraction domain objects"""
+
+    @staticmethod
+    def to_domain(
+        item: Any, tenant_id: int, company_id: int
+    ) -> USTariffFraction:
+        """Convert a FraccionesUSAResponse to a USTariffFraction instance (not persisted)"""
+        code = item.FRACCION_CON_PUNTO or item.FRACCION_MOSTRAR or item.FRACCION_SIN_PUNTO or ""
+        ad_valorem: Optional[float] = None
+        if item.TARIFA1:
+            try:
+                ad_valorem = float(str(item.TARIFA1).replace("%", "").strip())
+            except (ValueError, TypeError):
+                ad_valorem = None
+
+        fraction = USTariffFraction()
+        fraction.id = item.CONSECUTIVO
+        fraction.tenant_id = tenant_id
+        fraction.company_id = company_id
+        fraction.code = code
+        fraction.prefix = item.FRACCION_SIN_PUNTO
+        fraction.type_code = str(item.NIVEL) if item.NIVEL is not None else None
+        fraction.ad_valorem = ad_valorem
+        fraction.fixed_cost = None
+        fraction.unit_of_measure = item.UNIDADCANTIDAD
+        fraction.description = item.DESCRIPCION
+        now = datetime.now()
+        fraction.created_at = now
+        fraction.updated_at = now
+        return fraction
+
+
 class USTariffFractionService:
     """Service para gestionar fracciones arancelarias americanas"""
 
     @staticmethod
-    def get_all(
+    async def get_all(
         db: Session,
         tenant_id: int,
         company_id: int,