feat: shipping warehouse and cost

services/shipping_warehouse.py

@@ -0,0 +1,37 @@
+from typing import Union
+
+from sqlalchemy import select
+
+import models
+from schemas.shipping_warehouse import GetAllShippingWarehousesResponse, ShippingWarehouseSchema
+from services.base import BaseService
+
+
+class ShippingWarehouseService(BaseService):
+    async def get_all(self) -> GetAllShippingWarehousesResponse:
+        stmt = (
+            select(
+                models.ShippingWarehouse
+            )
+            .order_by(
+                models.ShippingWarehouse.id
+            )
+        )
+        shipping_warehouses = (await self.session.scalars(stmt)).all()
+        result = []
+        for shipping_warehouse in shipping_warehouses:
+            result.append(ShippingWarehouseSchema.model_validate(shipping_warehouse))
+        return GetAllShippingWarehousesResponse(shipping_warehouses=result)
+
+    async def get_by_name(self, name: str) -> Union[models.ShippingWarehouse, None]:
+        stmt = select(models.ShippingWarehouse).where(models.ShippingWarehouse.name == name)
+        shipping_warehouse = await self.session.scalar(stmt)
+        return shipping_warehouse
+
+    async def create_by_name(self, name: str) -> models.ShippingWarehouse:
+        shipping_warehouse = models.ShippingWarehouse(
+            name=name
+        )
+        self.session.add(shipping_warehouse)
+        await self.session.flush()
+        return shipping_warehouse