Include necessary info directly in get consumption entries response dto

src/Vegasco.Server.Api/Consumptions/GetConsumptions.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
+using Vegasco.Server.Api.Cars;
 using Vegasco.Server.Api.Persistence;
 
 namespace Vegasco.Server.Api.Consumptions;
@@ -17,7 +18,18 @@ public static class GetConsumptions
 		DateTimeOffset DateTime,
 		double Distance,
 		double Amount,
-		Guid CarId);
+		CarDto Car,
+		double? LiterPer100Km);
+
+	public record CarDto(
+		Guid Id,
+		string Name)
+	{
+		public static CarDto FromCar(Car car)
+		{
+			return new CarDto(car.Id.Value, car.Name);
+		}
+	}
 
 	public class Request
 	{
@@ -39,16 +51,37 @@ public static class GetConsumptions
 		ApplicationDbContext dbContext,
 		CancellationToken cancellationToken)
 	{
-		List<ResponseDto> consumptions = await dbContext.Consumptions
+		List<Consumption> consumptions = await dbContext.Consumptions
 			.OrderByDescending(x => x.DateTime)
-			.Select(x =>
-				new ResponseDto(x.Id.Value, x.DateTime, x.Distance, x.Amount, x.CarId.Value))
+			.Include(x => x.Car)
 			.ToListAsync(cancellationToken);
 
-		ApiResponse apiResponse = new()
+		List<ResponseDto> responses = [];
+
+		for (int i = 0; i < consumptions.Count; i++)
 		{
-			Consumptions = consumptions
-		};
+			Consumption consumption = consumptions[i];
+
+			double? literPer100Km = null;
+
+			bool isLast = i == consumptions.Count - 1;
+			if (!isLast)
+			{
+				Consumption previousConsumption = consumptions[i + 1];
+				double distanceDiff = consumption.Distance - previousConsumption.Distance;
+				literPer100Km = consumption.Amount / (distanceDiff / 100);
+			}
+
+			responses.Add(new ResponseDto(
+				consumption.Id.Value,
+				consumption.DateTime,
+				consumption.Distance,
+				consumption.Amount,
+				CarDto.FromCar(consumption.Car),
+				literPer100Km));
+		}
+
+		ApiResponse apiResponse = new() { Consumptions = responses };
 		return TypedResults.Ok(apiResponse);
 	}
 }