src/Vegasco.Server.Api/Cars/CreateCar.cs

@@ -39,19 +39,41 @@ public static class CreateCar
 		IEnumerable<IValidator<Request>> validators,
 		ApplicationDbContext dbContext,
 		UserAccessor userAccessor,
+		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		ILogger logger = loggerFactory.CreateLogger(nameof(CreateCar));
+		
 		List<ValidationResult> failedValidations = await validators.ValidateAllAsync(request, cancellationToken: cancellationToken);
 		if (failedValidations.Count > 0)
 		{
+			logger.LogDebug(
+				"Validation failed for request {@Request} with errors {@Errors}",
+				request,
+				failedValidations
+					.Where(x => !x.IsValid)
+					.SelectMany(x => x.Errors)
+					.Select(x => x.ErrorMessage));
+
 			return TypedResults.BadRequest(new HttpValidationProblemDetails(failedValidations.ToCombinedDictionary()));
 		}
 
+		bool isDuplicate = await dbContext.Cars
+			.AnyAsync(x => x.Name.ToUpper() == request.Name.ToUpper(), cancellationToken);
+
+		if (isDuplicate)
+		{
+			logger.LogDebug("Car with name '{CarName}' (case insensitive) already exists", request.Name);
+			return TypedResults.Conflict();
+		}
+
 		string userId = userAccessor.GetUserId();
 
 		User? user = await dbContext.Users.FindAsync([userId], cancellationToken: cancellationToken);
 		if (user is null)
 		{
+			logger.LogDebug("User with ID '{UserId}' not found, creating new user", userId);
+
 			user = new User
 			{
 				Id = userId
@@ -65,17 +87,11 @@ public static class CreateCar
 			UserId = userId
 		};
 
-		bool isDuplicate = await dbContext.Cars
-			.AnyAsync(x => x.Name.ToUpper() == request.Name.ToUpper(), cancellationToken);
-
-		if (isDuplicate)
-		{
-			return TypedResults.Conflict();
-		}
-
 		await dbContext.Cars.AddAsync(car, cancellationToken);
 		await dbContext.SaveChangesAsync(cancellationToken);
 
+		logger.LogTrace("Created new car: {@Car}", car);
+
 		Response response = new(car.Id.Value, car.Name);
 		return TypedResults.Created($"/v1/cars/{car.Id}", response);
 	}

src/Vegasco.Server.Api/Cars/DeleteCar.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using System.Diagnostics;
 using Vegasco.Server.Api.Persistence;
 
 namespace Vegasco.Server.Api.Cars;
@@ -21,6 +22,9 @@ public static class DeleteCar
 		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		Activity? activity = Activity.Current;
+		activity?.SetTag("id", id);
+
 		int rows = await dbContext.Cars
 			.Where(x => x.Id == new CarId(id))
 			.ExecuteDeleteAsync(cancellationToken);

src/Vegasco.Server.Api/Cars/GetCars.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
+using System.Diagnostics;
 using Vegasco.Server.Api.Persistence;
 
 namespace Vegasco.Server.Api.Cars;
@@ -34,11 +35,15 @@ public static class GetCars
 		ApplicationDbContext dbContext,
 		CancellationToken cancellationToken)
 	{
+		Activity? activity = Activity.Current;
+		
 		List<ResponseDto> cars = await dbContext.Cars
 			.Select(x => new ResponseDto(x.Id.Value, x.Name))
 			.ToListAsync(cancellationToken);
 
-		ApiResponse response = new ApiResponse
+		activity?.SetTag("carCount", cars.Count);
+		
+		ApiResponse response = new()
 		{
 			Cars = cars
 		};

src/Vegasco.Server.Api/Cars/UpdateCar.cs

@@ -10,6 +10,7 @@ namespace Vegasco.Server.Api.Cars;
 public static class UpdateCar
 {
 	public record Request(string Name);
+
 	public record Response(Guid Id, string Name);
 
 	public static RouteHandlerBuilder MapEndpoint(IEndpointRouteBuilder builder)
@@ -40,11 +41,22 @@ public static class UpdateCar
 		IEnumerable<IValidator<Request>> validators,
 		ApplicationDbContext dbContext,
 		UserAccessor userAccessor,
+		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		var logger = loggerFactory.CreateLogger(nameof(UpdateCar));
+
 		List<ValidationResult> failedValidations = await validators.ValidateAllAsync(request, cancellationToken);
 		if (failedValidations.Count > 0)
 		{
+			logger.LogDebug(
+				"Validation failed for request {@Request} with errors {@Errors}",
+				request,
+				failedValidations
+					.Where(x => !x.IsValid)
+					.SelectMany(x => x.Errors)
+					.Select(x => x.ErrorMessage));
+
 			return TypedResults.BadRequest(new HttpValidationProblemDetails(failedValidations.ToCombinedDictionary()));
 		}
 
@@ -60,13 +72,16 @@ public static class UpdateCar
 
 		if (isDuplicate)
 		{
+			logger.LogDebug("Car with name '{CarName}' (case insensitive) already exists", request.Name);
 			return TypedResults.Conflict();
 		}
 
 		car.Name = request.Name.Trim();
 		await dbContext.SaveChangesAsync(cancellationToken);
 
+		logger.LogTrace("Updated car: {@Car}", car);
+
 		Response response = new(car.Id.Value, car.Name);
 		return TypedResults.Ok(response);
 	}
-}
+}

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

@@ -1,5 +1,6 @@
 using FluentValidation;
 using FluentValidation.Results;
+using System.Diagnostics;
 using Vegasco.Server.Api.Cars;
 using Vegasco.Server.Api.Common;
 using Vegasco.Server.Api.Persistence;
@@ -49,11 +50,22 @@ public static class CreateConsumption
 		ApplicationDbContext dbContext,
 		Request request,
 		IEnumerable<IValidator<Request>> validators,
+		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		ILogger logger = loggerFactory.CreateLogger(nameof(CreateConsumption));
+
 		List<ValidationResult> failedValidations = await validators.ValidateAllAsync(request, cancellationToken);
 		if (failedValidations.Count > 0)
 		{
+			logger.LogDebug(
+				"Validation failed for request {@Request} with errors {@Errors}",
+				request,
+				failedValidations
+					.Where(x => !x.IsValid)
+					.SelectMany(x => x.Errors)
+					.Select(x => x.ErrorMessage));
+
 			return TypedResults.BadRequest(new HttpValidationProblemDetails(failedValidations.ToCombinedDictionary()));
 		}
 
@@ -74,6 +86,8 @@ public static class CreateConsumption
 		dbContext.Consumptions.Add(consumption);
 		await dbContext.SaveChangesAsync(cancellationToken);
 
+		logger.LogTrace("Created new consumption: {@Consumption}", consumption);
+
 		return TypedResults.Created($"consumptions/{consumption.Id.Value}",
 			new Response(consumption.Id.Value, consumption.DateTime, consumption.Distance, consumption.Amount,
 				consumption.CarId.Value));

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

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using System.Diagnostics;
 using Vegasco.Server.Api.Persistence;
 
 namespace Vegasco.Server.Api.Consumptions;
@@ -21,6 +22,9 @@ public static class DeleteConsumption
 		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		Activity? activity = Activity.Current;
+		activity?.SetTag("id", id);
+
 		int rows = await dbContext.Consumptions
 			.Where(x => x.Id == new ConsumptionId(id))
 			.ExecuteDeleteAsync(cancellationToken);

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

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Http.HttpResults;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.EntityFrameworkCore;
+using System.Diagnostics;
 using Vegasco.Server.Api.Cars;
 using Vegasco.Server.Api.Persistence;
 
@@ -49,8 +50,14 @@ public static class GetConsumptions
 	private static async Task<Ok<ApiResponse>> Endpoint(
 		[AsParameters] Request request,
 		ApplicationDbContext dbContext,
+		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		ILogger logger = loggerFactory.CreateLogger(nameof(GetConsumptions));
+		
+		logger.LogTrace("Received request to get consumptions with parameters: {@Request}", request);
+		Activity? activity = Activity.Current;
+		
 		Dictionary<CarId, List<Consumption>> consumptionsByCar = await dbContext.Consumptions
 			.Include(x => x.Car)
 			.GroupBy(x => x.CarId)
@@ -83,6 +90,8 @@ public static class GetConsumptions
 					literPer100Km));
 			}
 		}
+		
+		activity?.SetTag("consumptionCount", responses.Count);
 
 		ApiResponse apiResponse = new()
 		{

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

@@ -48,11 +48,22 @@ public static class UpdateConsumption
 		Guid id,
 		Request request,
 		IEnumerable<IValidator<Request>> validators,
+		ILoggerFactory loggerFactory,
 		CancellationToken cancellationToken)
 	{
+		ILogger logger = loggerFactory.CreateLogger(nameof(UpdateConsumption));
+		
 		List<ValidationResult> failedValidations = await validators.ValidateAllAsync(request, cancellationToken);
 		if (failedValidations.Count > 0)
 		{
+			logger.LogDebug(
+				"Validation failed for request {@Request} with errors {@Errors}",
+				request,
+				failedValidations
+					.Where(x => !x.IsValid)
+					.SelectMany(x => x.Errors)
+					.Select(x => x.ErrorMessage));
+
 			return TypedResults.BadRequest(new HttpValidationProblemDetails(failedValidations.ToCombinedDictionary()));
 		}
 
@@ -68,6 +79,8 @@ public static class UpdateConsumption
 
 		await dbContext.SaveChangesAsync(cancellationToken);
 
+		logger.LogTrace("Updated consumption: {@Consumption}", consumption);
+
 		return TypedResults.Ok(new Response(consumption.Id.Value, consumption.DateTime, consumption.Distance, consumption.Amount, consumption.CarId.Value));
 	}
 }