Feature: Complete order management for pending orders

- Added delete order functionality with identity verification
- OrderDetailsMenu now shows conditional buttons based on order/payment state
- Retry payment if no payments exist
- View payment details if payment pending
- Delete order option for all pending orders
- Full client SDK implementation for CancelOrderAsync

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop.Client/Services/IOrderService.cs

@@ -11,4 +11,5 @@ public interface IOrderService
     Task<ApiResponse<Order>> GetOrderByCustomerIdAsync(Guid customerId, Guid orderId);
     Task<ApiResponse<CryptoPayment>> CreatePaymentAsync(Guid orderId, int currency);
     Task<ApiResponse<List<CryptoPayment>>> GetOrderPaymentsAsync(Guid orderId);
+    Task<ApiResponse<bool>> CancelOrderAsync(Guid orderId, string identityReference);
 }

LittleShop.Client/Services/OrderService.cs

@@ -185,8 +185,31 @@ public class OrderService : IOrderService
         {
             _logger.LogError(ex, "Failed to get payments for order {OrderId}", orderId);
             return ApiResponse<List<CryptoPayment>>.Failure(
-                ex.Message, 
+                ex.Message,
                 System.Net.HttpStatusCode.InternalServerError);
         }
     }
+
+    public async Task<ApiResponse<bool>> CancelOrderAsync(Guid orderId, string identityReference)
+    {
+        try
+        {
+            var response = await _httpClient.PostAsJsonAsync(
+                $"api/orders/{orderId}/cancel",
+                new { IdentityReference = identityReference }
+            );
+
+            if (response.IsSuccessStatusCode)
+            {
+                return ApiResponse<bool>.Success(true, response.StatusCode);
+            }
+
+            return ApiResponse<bool>.Failure("Failed to cancel order", response.StatusCode);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Error cancelling order {OrderId}", orderId);
+            return ApiResponse<bool>.Failure($"Error: {ex.Message}", System.Net.HttpStatusCode.InternalServerError);
+        }
+    }
 }

TeleBot/TeleBot/Handlers/CallbackHandler.cs

@@ -180,6 +180,10 @@ namespace TeleBot.Handlers
                         await HandleRetryPayment(bot, callbackQuery.Message, session, Guid.Parse(data[1]));
                         break;
 
+                    case "delete_order":
+                        await HandleDeleteOrder(bot, callbackQuery, session, Guid.Parse(data[1]), callbackQuery.From);
+                        break;
+
                     case "reviews":
                         await HandleViewReviews(bot, callbackQuery.Message, session);
                         break;
@@ -1215,6 +1219,43 @@ namespace TeleBot.Handlers
             );
         }
 
+        private async Task HandleDeleteOrder(ITelegramBotClient bot, CallbackQuery callbackQuery, UserSession session, Guid orderId, User telegramUser)
+        {
+            // Build identity reference from telegram user
+            var identityReference = $"telegram:{telegramUser.Id}:{telegramUser.Username ?? ""}";
+
+            var success = await _shopService.CancelOrderAsync(orderId, identityReference);
+
+            if (success)
+            {
+                await bot.EditMessageTextAsync(
+                    callbackQuery.Message!.Chat.Id,
+                    callbackQuery.Message.MessageId,
+                    "✅ *Order Deleted*\n\n" +
+                    $"Order #{orderId.ToString().Substring(orderId.ToString().Length - 8).ToUpper()} has been cancelled and removed.",
+                    parseMode: Telegram.Bot.Types.Enums.ParseMode.Markdown,
+                    replyMarkup: new InlineKeyboardMarkup(new[]
+                    {
+                        new[]
+                        {
+                            InlineKeyboardButton.WithCallbackData("⬅️ Back to Orders", "orders"),
+                            InlineKeyboardButton.WithCallbackData("🏠 Main Menu", "menu")
+                        }
+                    })
+                );
+
+                await bot.AnswerCallbackQueryAsync(callbackQuery.Id, "Order deleted successfully");
+            }
+            else
+            {
+                await bot.AnswerCallbackQueryAsync(
+                    callbackQuery.Id,
+                    "Failed to delete order. It may have already been processed.",
+                    showAlert: true
+                );
+            }
+        }
+
         private async Task HandleViewPayment(ITelegramBotClient bot, Message message, UserSession session, Guid orderId, User telegramUser)
         {
             var order = await _shopService.GetCustomerOrderAsync(

TeleBot/TeleBot/Services/LittleShopService.cs

@@ -24,6 +24,7 @@ namespace TeleBot.Services
         Task<Order?> GetOrderAsync(Guid orderId);
         Task<Order?> GetCustomerOrderAsync(Guid orderId, long telegramUserId, string telegramUsername, string displayName, string firstName, string lastName);
         Task<CryptoPayment?> CreatePaymentAsync(Guid orderId, string currency);
+        Task<bool> CancelOrderAsync(Guid orderId, string identityReference);
         Task<List<CustomerMessage>?> GetPendingMessagesAsync();
         Task<bool> MarkMessageAsSentAsync(Guid messageId, string? platformMessageId = null);
         Task<bool> MarkMessageAsFailedAsync(Guid messageId, string reason);
@@ -358,6 +359,31 @@ namespace TeleBot.Services
             }
         }
 
+        public async Task<bool> CancelOrderAsync(Guid orderId, string identityReference)
+        {
+            try
+            {
+                if (!await AuthenticateAsync())
+                    return false;
+
+                var result = await _client.Orders.CancelOrderAsync(orderId, identityReference);
+
+                if (result.IsSuccess)
+                {
+                    _logger.LogInformation("Order {OrderId} cancelled for customer {Identity}", orderId, identityReference);
+                    return true;
+                }
+
+                _logger.LogWarning("Failed to cancel order {OrderId}: {Error}", orderId, result.ErrorMessage);
+                return false;
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error cancelling order {OrderId}", orderId);
+                return false;
+            }
+        }
+
         public async Task<List<CustomerMessage>?> GetPendingMessagesAsync()
         {
             try

TeleBot/TeleBot/UI/MenuBuilder.cs

@@ -209,12 +209,30 @@ namespace TeleBot.UI
         {
             var buttons = new List<InlineKeyboardButton[]>();
 
-            // If order has pending payment, show payment details button
-            if (order.Status == 0 && order.Payments.Any(p => p.Status == 0)) // PendingPayment order with pending payment
+            // Order management based on status and payment state
+            if (order.Status == 0) // Pending Payment
             {
+                if (!order.Payments.Any())
+                {
+                    // No payment created - offer retry
+                    buttons.Add(new[]
+                    {
+                        InlineKeyboardButton.WithCallbackData("🔄 Retry Payment", $"retry_payment:{order.Id}")
+                    });
+                }
+                else if (order.Payments.Any(p => p.Status == 0)) // Has pending payment
+                {
+                    // Show payment details
+                    buttons.Add(new[]
+                    {
+                        InlineKeyboardButton.WithCallbackData("💳 View Payment Details", $"payment:{order.Id}")
+                    });
+                }
+
+                // Allow deleting pending orders
                 buttons.Add(new[]
                 {
-                    InlineKeyboardButton.WithCallbackData("💳 View Payment Details", $"payment:{order.Id}")
+                    InlineKeyboardButton.WithCallbackData("🗑️ Delete Order", $"delete_order:{order.Id}")
                 });
             }