payment

Webshop.Application/Services/Public/Interfaces/IPaymentMethodService.cs

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+// src/Webshop.Application/Services/Public/IPaymentMethodService.cs
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Webshop.Application.DTOs.Payments; // Für PaymentMethodDto
+
+namespace Webshop.Application.Services.Public
+{
+    public interface IPaymentMethodService
+    {
+        /// <summary>
+        /// Ruft alle aktiven Zahlungsmethoden ab, die im Checkout für den Kunden sichtbar sein sollen.
+        /// </summary>
+        /// <returns>Eine Liste von PaymentMethodDto mit öffentlichen Konfigurationsdaten.</returns>
+        Task<IEnumerable<PaymentMethodDto>> GetAllActiveAsync();
+    }
+}

Webshop.Application/Services/Public/PaymentMethodService.cs

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+// src/Webshop.Application/Services/Public/PaymentMethodService.cs
+using System.Collections.Generic;
+using System.Linq;
+using System.Text.Json; // Für JSON-Verarbeitung
+using System.Threading.Tasks;
+using Webshop.Application.DTOs.Payments;
+using Webshop.Domain.Enums;
+using Webshop.Domain.Interfaces;
+
+
+namespace Webshop.Application.Services.Public
+{
+    public class PaymentMethodService : IPaymentMethodService
+    {
+        private readonly IPaymentMethodRepository _paymentMethodRepository;
+
+        public PaymentMethodService(IPaymentMethodRepository paymentMethodRepository)
+        {
+            _paymentMethodRepository = paymentMethodRepository;
+        }
+
+        public async Task<IEnumerable<PaymentMethodDto>> GetAllActiveAsync()
+        {
+            var paymentMethods = await _paymentMethodRepository.GetAllAsync();
+
+            return paymentMethods
+                .Where(pm => pm.IsActive)
+                .Select(pm => new PaymentMethodDto
+                {
+                    Id = pm.Id,
+                    Name = pm.Name,
+                    Description = pm.Description,
+                    PaymentGatewayType = pm.PaymentGatewayType,
+                    ProcessingFee = pm.ProcessingFee,
+                    PublicConfiguration = GetPublicConfiguration(pm.PaymentGatewayType, pm.Configuration)
+                }).ToList();
+        }
+
+        private object? GetPublicConfiguration(PaymentGatewayType type, string? configJson)
+        {
+            if (string.IsNullOrEmpty(configJson)) return null;
+
+            // Beispiel: Nur für BankTransfer geben wir IBAN etc. preis
+            if (type == PaymentGatewayType.BankTransfer)
+            {
+                var config = JsonSerializer.Deserialize<Dictionary<string, string>>(configJson);
+                if (config != null)
+                {
+                    // Filter, um geheime Schlüssel NICHT an das Frontend zu senden
+                    return new { IBAN = config.GetValueOrDefault("IBAN"), BIC = config.GetValueOrDefault("BIC"), BankName = config.GetValueOrDefault("BankName") };
+                }
+            }
+
+            // Für Stripe/PayPal geben wir nur den Public Key preis
+            if (type == PaymentGatewayType.Stripe)
+            {
+                var config = JsonSerializer.Deserialize<Dictionary<string, string>>(configJson);
+                if (config != null)
+                {
+                    return new { PublicKey = config.GetValueOrDefault("PublicKey") };
+                }
+            }
+
+            return null; // Für andere Typen geben wir keine Konfigurationsdetails preis
+        }
+    }
+}