CRUD modulo Requisicion de combustible

backend/src/modules/fuel-requests/fuelRequest.service.ts

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+import fuelRequestModel from "./fuelRequest.model";
+import { IFuelRequest } from "./fuelRequest.interface";
+
+import { generateRequestNumber } from "../../utils/requestNumber";
+
+export class FuelRequestService {
+    //Obtener todas las requisiciones
+
+    async getAll() {
+        return await fuelRequestModel
+            .find()
+            .populate("fuelPumpId")
+            .populate("fuelTypeId")
+            .populate("createdBy")
+            .populate("authorizedBy")
+            .sort({ createdAt: -1 });
+    }
+
+    //Obtener reauisición por ID
+
+    async getById(
+        id:string
+    ) {
+
+        return await fuelRequestModel
+            .findById(id)
+            .populate("fuelPumpId")
+            .populate("fuelTypeId")
+            .populate("createdBy")
+            .populate("authorizedBy");
+
+    }
+
+    //Crear una nueva requisición
+
+    async create (
+        data:IFuelRequest
+    ){
+        //Generar número automático
+        data.requestNumber = generateRequestNumber();
+
+        //Calcular distancia recorrida
+        data.distanceTraveled = data.currentMileage - data.previousMileage;
+
+        //Calcular monto total
+        data.totalAmount = data.gallonQuantity * data.pricePerGallon;
+
+        //Estado inicial
+        data.status = "PENDIENTE";
+
+        //Crear documento
+        const request = new fuelRequestModel(data);
+
+        //Guardar en DB
+        return await request.save();
+
+    }
+
+    async update(
+        id:string,
+        data:Partial<IFuelRequest>
+    ){
+        //Recalcular distancia
+        if(data.currentMileage !== undefined &&
+            data.previousMileage !== undefined
+        ){
+            data.distanceTraveled =
+            data.currentMileage -
+            data.previousMileage;
+        }
+
+        //Recalcular monto
+        if(
+            data.gallonQuantity !== undefined &&
+            data.pricePerGallon !== undefined
+        ){
+            data.totalAmount =
+            data.gallonQuantity *
+            data.pricePerGallon;
+        }
+
+        return await fuelRequestModel
+        .findByIdAndUpdate(
+            id,
+            data,
+            {
+                new:true
+            }
+        );
+    }
+
+    //Eliminar requisición
+
+    async delete(
+        id:string
+    ){
+
+        return await fuelRequestModel
+        .findByIdAndDelete(id);
+    }
+}