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feat: add .NET backend development plugin (#157)
Co-authored-by: Martineto21 <ramac21@gmail.com>
This commit is contained in:
Rafael Martínez – Dev & IA
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GitHub
GitHub
parent
f95810b340
commit
c81daa055d
@@ -0,0 +1,336 @@
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// Service Implementation Template for .NET 8+
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// This template demonstrates best practices for building robust services
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using System.Text.Json;
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using FluentValidation;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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namespace YourNamespace.Application.Services;
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/// <summary>
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/// Configuration options for the service
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/// </summary>
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public class ProductServiceOptions
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{
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public const string SectionName = "ProductService";
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public int DefaultPageSize { get; set; } = 50;
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public int MaxPageSize { get; set; } = 200;
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public TimeSpan CacheDuration { get; set; } = TimeSpan.FromMinutes(15);
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public bool EnableEnrichment { get; set; } = true;
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}
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/// <summary>
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/// Generic result type for operations that can fail
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/// </summary>
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public class Result<T>
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{
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public bool IsSuccess { get; }
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public T? Value { get; }
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public string? Error { get; }
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public string? ErrorCode { get; }
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private Result(bool isSuccess, T? value, string? error, string? errorCode)
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{
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IsSuccess = isSuccess;
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Value = value;
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Error = error;
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ErrorCode = errorCode;
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}
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public static Result<T> Success(T value) => new(true, value, null, null);
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public static Result<T> Failure(string error, string? code = null) => new(false, default, error, code);
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public Result<TNew> Map<TNew>(Func<T, TNew> mapper) =>
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IsSuccess ? Result<TNew>.Success(mapper(Value!)) : Result<TNew>.Failure(Error!, ErrorCode);
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}
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/// <summary>
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/// Service interface - define the contract
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/// </summary>
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public interface IProductService
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{
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Task<Result<Product>> GetByIdAsync(string id, CancellationToken ct = default);
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Task<Result<PagedResult<Product>>> SearchAsync(ProductSearchRequest request, CancellationToken ct = default);
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Task<Result<Product>> CreateAsync(CreateProductRequest request, CancellationToken ct = default);
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Task<Result<Product>> UpdateAsync(string id, UpdateProductRequest request, CancellationToken ct = default);
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Task<Result<bool>> DeleteAsync(string id, CancellationToken ct = default);
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}
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/// <summary>
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/// Service implementation with full patterns
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/// </summary>
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public class ProductService : IProductService
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{
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private readonly IProductRepository _repository;
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private readonly ICacheService _cache;
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private readonly IValidator<CreateProductRequest> _createValidator;
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private readonly IValidator<UpdateProductRequest> _updateValidator;
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private readonly ILogger<ProductService> _logger;
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private readonly ProductServiceOptions _options;
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public ProductService(
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IProductRepository repository,
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ICacheService cache,
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IValidator<CreateProductRequest> createValidator,
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IValidator<UpdateProductRequest> updateValidator,
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ILogger<ProductService> logger,
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IOptions<ProductServiceOptions> options)
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{
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_repository = repository ?? throw new ArgumentNullException(nameof(repository));
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_cache = cache ?? throw new ArgumentNullException(nameof(cache));
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_createValidator = createValidator ?? throw new ArgumentNullException(nameof(createValidator));
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_updateValidator = updateValidator ?? throw new ArgumentNullException(nameof(updateValidator));
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_logger = logger ?? throw new ArgumentNullException(nameof(logger));
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_options = options?.Value ?? throw new ArgumentNullException(nameof(options));
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}
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public async Task<Result<Product>> GetByIdAsync(string id, CancellationToken ct = default)
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{
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if (string.IsNullOrWhiteSpace(id))
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return Result<Product>.Failure("Product ID is required", "INVALID_ID");
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try
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{
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// Try cache first
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var cacheKey = GetCacheKey(id);
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var cached = await _cache.GetAsync<Product>(cacheKey, ct);
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if (cached != null)
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{
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_logger.LogDebug("Cache hit for product {ProductId}", id);
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return Result<Product>.Success(cached);
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}
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// Fetch from repository
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var product = await _repository.GetByIdAsync(id, ct);
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if (product == null)
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{
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_logger.LogWarning("Product not found: {ProductId}", id);
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return Result<Product>.Failure($"Product '{id}' not found", "NOT_FOUND");
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}
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// Populate cache
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await _cache.SetAsync(cacheKey, product, _options.CacheDuration, ct);
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return Result<Product>.Success(product);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error retrieving product {ProductId}", id);
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return Result<Product>.Failure("An error occurred while retrieving the product", "INTERNAL_ERROR");
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}
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}
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public async Task<Result<PagedResult<Product>>> SearchAsync(
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ProductSearchRequest request,
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CancellationToken ct = default)
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{
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try
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{
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// Sanitize pagination
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var pageSize = Math.Clamp(request.PageSize ?? _options.DefaultPageSize, 1, _options.MaxPageSize);
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var page = Math.Max(request.Page ?? 1, 1);
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var sanitizedRequest = request with
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{
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PageSize = pageSize,
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Page = page
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};
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// Execute search
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var (items, totalCount) = await _repository.SearchAsync(sanitizedRequest, ct);
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var result = new PagedResult<Product>
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{
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Items = items,
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TotalCount = totalCount,
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Page = page,
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PageSize = pageSize,
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TotalPages = (int)Math.Ceiling((double)totalCount / pageSize)
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};
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return Result<PagedResult<Product>>.Success(result);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error searching products with request {@Request}", request);
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return Result<PagedResult<Product>>.Failure("An error occurred while searching products", "INTERNAL_ERROR");
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}
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}
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public async Task<Result<Product>> CreateAsync(CreateProductRequest request, CancellationToken ct = default)
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{
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// Validate
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var validation = await _createValidator.ValidateAsync(request, ct);
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if (!validation.IsValid)
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{
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var errors = string.Join("; ", validation.Errors.Select(e => e.ErrorMessage));
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return Result<Product>.Failure(errors, "VALIDATION_ERROR");
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}
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try
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{
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// Check for duplicates
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var existing = await _repository.GetBySkuAsync(request.Sku, ct);
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if (existing != null)
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return Result<Product>.Failure($"Product with SKU '{request.Sku}' already exists", "DUPLICATE_SKU");
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// Create entity
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var product = new Product
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{
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Id = Guid.NewGuid().ToString("N"),
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Name = request.Name,
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Sku = request.Sku,
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Price = request.Price,
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CategoryId = request.CategoryId,
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CreatedAt = DateTime.UtcNow
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};
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// Persist
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var created = await _repository.CreateAsync(product, ct);
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_logger.LogInformation("Created product {ProductId} with SKU {Sku}", created.Id, created.Sku);
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return Result<Product>.Success(created);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error creating product with SKU {Sku}", request.Sku);
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return Result<Product>.Failure("An error occurred while creating the product", "INTERNAL_ERROR");
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}
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}
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public async Task<Result<Product>> UpdateAsync(
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string id,
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UpdateProductRequest request,
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CancellationToken ct = default)
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{
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if (string.IsNullOrWhiteSpace(id))
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return Result<Product>.Failure("Product ID is required", "INVALID_ID");
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// Validate
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var validation = await _updateValidator.ValidateAsync(request, ct);
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if (!validation.IsValid)
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{
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var errors = string.Join("; ", validation.Errors.Select(e => e.ErrorMessage));
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return Result<Product>.Failure(errors, "VALIDATION_ERROR");
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}
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try
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{
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// Fetch existing
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var existing = await _repository.GetByIdAsync(id, ct);
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if (existing == null)
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return Result<Product>.Failure($"Product '{id}' not found", "NOT_FOUND");
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// Apply updates (only non-null values)
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if (request.Name != null) existing.Name = request.Name;
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if (request.Price.HasValue) existing.Price = request.Price.Value;
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if (request.CategoryId.HasValue) existing.CategoryId = request.CategoryId.Value;
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existing.UpdatedAt = DateTime.UtcNow;
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// Persist
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var updated = await _repository.UpdateAsync(existing, ct);
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// Invalidate cache
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await _cache.RemoveAsync(GetCacheKey(id), ct);
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_logger.LogInformation("Updated product {ProductId}", id);
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return Result<Product>.Success(updated);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error updating product {ProductId}", id);
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return Result<Product>.Failure("An error occurred while updating the product", "INTERNAL_ERROR");
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}
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}
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public async Task<Result<bool>> DeleteAsync(string id, CancellationToken ct = default)
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{
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if (string.IsNullOrWhiteSpace(id))
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return Result<bool>.Failure("Product ID is required", "INVALID_ID");
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try
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{
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var existing = await _repository.GetByIdAsync(id, ct);
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if (existing == null)
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return Result<bool>.Failure($"Product '{id}' not found", "NOT_FOUND");
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// Soft delete
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await _repository.DeleteAsync(id, ct);
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// Invalidate cache
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await _cache.RemoveAsync(GetCacheKey(id), ct);
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_logger.LogInformation("Deleted product {ProductId}", id);
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return Result<bool>.Success(true);
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}
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catch (Exception ex)
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{
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_logger.LogError(ex, "Error deleting product {ProductId}", id);
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return Result<bool>.Failure("An error occurred while deleting the product", "INTERNAL_ERROR");
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}
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}
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private static string GetCacheKey(string id) => $"product:{id}";
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}
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// Supporting types
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public record CreateProductRequest(string Name, string Sku, decimal Price, int CategoryId);
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public record UpdateProductRequest(string? Name = null, decimal? Price = null, int? CategoryId = null);
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public record ProductSearchRequest(
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string? SearchTerm = null,
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int? CategoryId = null,
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decimal? MinPrice = null,
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decimal? MaxPrice = null,
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int? Page = null,
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int? PageSize = null);
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public class PagedResult<T>
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{
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public IReadOnlyList<T> Items { get; init; } = Array.Empty<T>();
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public int TotalCount { get; init; }
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public int Page { get; init; }
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public int PageSize { get; init; }
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public int TotalPages { get; init; }
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public bool HasNextPage => Page < TotalPages;
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public bool HasPreviousPage => Page > 1;
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}
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public class Product
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{
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public string Id { get; set; } = string.Empty;
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public string Name { get; set; } = string.Empty;
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public string Sku { get; set; } = string.Empty;
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public decimal Price { get; set; }
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public int CategoryId { get; set; }
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public DateTime CreatedAt { get; set; }
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public DateTime? UpdatedAt { get; set; }
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}
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// Validators using FluentValidation
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public class CreateProductRequestValidator : AbstractValidator<CreateProductRequest>
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{
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public CreateProductRequestValidator()
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{
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RuleFor(x => x.Name)
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.NotEmpty().WithMessage("Name is required")
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.MaximumLength(200).WithMessage("Name must not exceed 200 characters");
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RuleFor(x => x.Sku)
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.NotEmpty().WithMessage("SKU is required")
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.MaximumLength(50).WithMessage("SKU must not exceed 50 characters")
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.Matches(@"^[A-Z0-9\-]+$").WithMessage("SKU must contain only uppercase letters, numbers, and hyphens");
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RuleFor(x => x.Price)
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.GreaterThan(0).WithMessage("Price must be greater than 0");
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RuleFor(x => x.CategoryId)
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.GreaterThan(0).WithMessage("Category is required");
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}
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}
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