checkout
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@@ -4,6 +4,7 @@ using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Webshop.Application;
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using Webshop.Application.DTOs.Customers;
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using Webshop.Application.DTOs.Orders;
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using Webshop.Application.Services.Customers.Interfaces;
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@@ -25,12 +26,8 @@ namespace Webshop.Application.Services.Customers
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private readonly IDiscountService _discountService;
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public CheckoutService(
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ApplicationDbContext context,
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IOrderRepository orderRepository,
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ICustomerRepository customerRepository,
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IShippingMethodRepository shippingMethodRepository,
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ISettingService settingService,
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IDiscountService discountService)
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ApplicationDbContext context, IOrderRepository orderRepository, ICustomerRepository customerRepository,
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IShippingMethodRepository shippingMethodRepository, ISettingService settingService, IDiscountService discountService)
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{
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_context = context;
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_orderRepository = orderRepository;
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@@ -40,41 +37,31 @@ namespace Webshop.Application.Services.Customers
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_discountService = discountService;
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}
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public async Task<(bool Success, OrderDetailDto? CreatedOrder, string? ErrorMessage)> CreateOrderAsync(CreateOrderDto orderDto, string? userId)
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public async Task<ServiceResult<OrderDetailDto>> CreateOrderAsync(CreateOrderDto orderDto, string? userId)
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{
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await using var transaction = await _context.Database.BeginTransactionAsync();
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try
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{
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// --- 1. Validierung von Kunde, Adressen und Methoden ---
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Customer? customer = null;
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if (!string.IsNullOrEmpty(userId))
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{
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customer = await _customerRepository.GetByUserIdAsync(userId);
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if (customer == null) return (false, null, "Kundenprofil nicht gefunden.");
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// 1. Validierung von Kunde, Adressen und Methoden
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var customer = await _customerRepository.GetByUserIdAsync(userId!);
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if (customer == null)
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.Unauthorized, "Kundenprofil nicht gefunden.");
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// Validiere, dass die Adressen zum eingeloggten Kunden gehören
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if (!await _context.Addresses.AnyAsync(a => a.Id == orderDto.ShippingAddressId && a.CustomerId == customer.Id) ||
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!await _context.Addresses.AnyAsync(a => a.Id == orderDto.BillingAddressId && a.CustomerId == customer.Id))
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{
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return (false, null, "Ungültige oder nicht zugehörige Liefer- oder Rechnungsadresse.");
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}
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}
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else
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if (!await _context.Addresses.AnyAsync(a => a.Id == orderDto.ShippingAddressId && a.CustomerId == customer.Id) ||
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!await _context.Addresses.AnyAsync(a => a.Id == orderDto.BillingAddressId && a.CustomerId == customer.Id))
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{
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// Gast-Checkout: Validierung der Gast-Daten
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if (string.IsNullOrWhiteSpace(orderDto.GuestEmail))
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return (false, null, "Für Gastbestellungen ist eine E-Mail-Adresse erforderlich.");
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// Hinweis: Bei Gastbestellungen müssten die Adress-DTOs mitgesendet und hier neue Adressen erstellt werden.
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// Der Einfachheit halber nehmen wir an, die Adress-IDs sind gültig, aber nicht mit einem Kunden verknüpft.
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.Forbidden, "Ungültige oder nicht zugehörige Liefer- oder Rechnungsadresse.");
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}
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var shippingMethod = await _shippingMethodRepository.GetByIdAsync(orderDto.ShippingMethodId);
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if (shippingMethod == null || !shippingMethod.IsActive) return (false, null, "Ungültige oder inaktive Versandmethode.");
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if (shippingMethod == null || !shippingMethod.IsActive)
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.InvalidInput, "Ungültige oder inaktive Versandmethode.");
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var paymentMethod = await _context.PaymentMethods.FindAsync(orderDto.PaymentMethodId);
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if (paymentMethod == null || !paymentMethod.IsActive) return (false, null, "Ungültige oder inaktive Zahlungsmethode.");
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if (paymentMethod == null || !paymentMethod.IsActive)
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.InvalidInput, "Ungültige oder inaktive Zahlungsmethode.");
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// --- 2. Artikel verarbeiten und Lagerbestand prüfen ---
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// 2. Artikel verarbeiten und Lagerbestand prüfen
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var orderItems = new List<OrderItem>();
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var productIds = orderDto.Items.Select(i => i.ProductId).ToList();
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var products = await _context.Products.Where(p => productIds.Contains(p.Id)).ToListAsync();
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@@ -86,15 +73,15 @@ namespace Webshop.Application.Services.Customers
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if (product == null || !product.IsActive)
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{
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await transaction.RollbackAsync();
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return (false, null, $"Ein Produkt im Warenkorb ist nicht mehr verfügbar.");
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.Conflict, "Ein Produkt im Warenkorb ist nicht mehr verfügbar.");
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}
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if (product.StockQuantity < itemDto.Quantity)
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{
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await transaction.RollbackAsync();
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return (false, null, $"Nicht genügend Lagerbestand für '{product.Name}'. Verfügbar: {product.StockQuantity}, benötigt: {itemDto.Quantity}.");
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.Conflict, $"Nicht genügend Lagerbestand für '{product.Name}'. Verfügbar: {product.StockQuantity}, benötigt: {itemDto.Quantity}.");
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}
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product.StockQuantity -= itemDto.Quantity; // Lagerbestand reduzieren
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product.StockQuantity -= itemDto.Quantity;
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var orderItem = new OrderItem
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{
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@@ -110,7 +97,7 @@ namespace Webshop.Application.Services.Customers
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itemsTotal += orderItem.TotalPrice;
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}
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// --- 3. Preise, Rabatte, Steuern und Gesamtbetrag berechnen ---
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// 3. Preise, Rabatte, Steuern und Gesamtbetrag berechnen
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var discountResult = await _discountService.CalculateDiscountAsync(orderItems, orderDto.CouponCode);
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decimal discountAmount = discountResult.TotalDiscountAmount;
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decimal shippingCost = shippingMethod.BaseCost;
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@@ -121,12 +108,10 @@ namespace Webshop.Application.Services.Customers
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decimal taxAmount = subTotal * taxRate;
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decimal orderTotal = subTotal + taxAmount;
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// --- 4. Bestellung erstellen ---
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// 4. Bestellung erstellen
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var newOrder = new Order
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{
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CustomerId = customer?.Id,
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GuestEmail = customer == null ? orderDto.GuestEmail : null,
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GuestPhoneNumber = customer == null ? orderDto.GuestPhoneNumber : null,
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CustomerId = customer.Id,
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OrderNumber = $"WS-{DateTime.UtcNow:yyyyMMdd}-{new Random().Next(1000, 9999)}",
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OrderDate = DateTimeOffset.UtcNow,
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OrderStatus = OrderStatus.Pending.ToString(),
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@@ -144,30 +129,24 @@ namespace Webshop.Application.Services.Customers
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};
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await _orderRepository.AddAsync(newOrder);
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// --- 5. Rabattnutzung erhöhen ---
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// 5. Rabattnutzung erhöhen
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if (discountResult.AppliedDiscountIds.Any())
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{
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var appliedDiscounts = await _context.Discounts
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.Where(d => discountResult.AppliedDiscountIds.Contains(d.Id))
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.ToListAsync();
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foreach (var discount in appliedDiscounts)
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{
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discount.CurrentUsageCount++;
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}
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var appliedDiscounts = await _context.Discounts.Where(d => discountResult.AppliedDiscountIds.Contains(d.Id)).ToListAsync();
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foreach (var discount in appliedDiscounts) { discount.CurrentUsageCount++; }
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}
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await _context.SaveChangesAsync(); // Speichert Lagerbestandsänderungen & Rabattnutzung
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await _context.SaveChangesAsync();
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await transaction.CommitAsync();
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// --- 6. Erfolgreiche Antwort erstellen ---
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// 6. Erfolgreiche Antwort erstellen
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var createdOrder = await _orderRepository.GetByIdAsync(newOrder.Id);
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var orderDetailDto = MapToOrderDetailDto(createdOrder!);
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return (true, orderDetailDto, null);
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return ServiceResult.Ok(MapToOrderDetailDto(createdOrder!));
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}
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catch (Exception ex)
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{
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await transaction.RollbackAsync();
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return (false, null, $"Ein unerwarteter Fehler ist aufgetreten: {ex.Message}");
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return ServiceResult.Fail<OrderDetailDto>(ServiceResultType.Failure, $"Ein unerwarteter Fehler ist aufgetreten: {ex.Message}");
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}
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}
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