first commit

Interfaces/Services/ICustomerSubscriptionService.cs

@@ -0,0 +1,22 @@
+using Fitness_core_BE.DTOs.CustomerSubscription;
+using Microsoft.AspNetCore.Http;
+
+namespace Fitness_core_BE.Interfaces.Services
+{
+    public interface ICustomerSubscriptionService
+    {
+        Task<object> CreateCustomerSubscription(object payload, HttpContext httpContext);
+        Task<object> GetCustomerSubscriptionById(object payload, HttpContext httpContext);
+        Task<object> GetCustomerSubscriptionsByCustomerId(object payload, HttpContext httpContext);
+        Task<object> GetActiveSubscriptionByCustomerId(object payload, HttpContext httpContext);
+
+        Task<object> GetSubscriptionSummary(object payload, HttpContext httpContext);
+        Task<object> AddMemberToSubscription(object payload, HttpContext httpContext);
+        Task<object> RemoveMemberFromSubscription(object payload, HttpContext httpContext);
+        Task<List<SubscriptionSummaryDto>> BuildSummariesForCustomerAsync(Guid customerId);
+
+        // Optional extra fees on a subscription (req 6 — e.g. coaching fee, once or recurring).
+        Task<List<CustomerSubItemDto>> GetExtraFeesAsync(Guid subscriptionId, HttpContext httpContext);
+        Task<object> AddExtraFeeAsync(Guid subscriptionId, AddExtraFeeRequest request, HttpContext httpContext);
+    }
+}