feat: Add ClearCart command and response, implement CancelOrder command with validation, and enhance DeliveryStatus and User models

src/CMSMicroservice.Application/UserCartsCQ/Commands/ClearCart/ClearCartCommand.cs

@@ -0,0 +1,12 @@
+namespace CMSMicroservice.Application.UserCartsCQ.Commands.ClearCart;
+
+/// <summary>
+/// Command برای پاک کردن تمام سبد خرید کاربر
+/// </summary>
+public record ClearCartCommand : IRequest<ClearCartResponseDto>
+{
+    /// <summary>
+    /// شناسه کاربر
+    /// </summary>
+    public long UserId { get; init; }
+}

src/CMSMicroservice.Application/UserCartsCQ/Commands/ClearCart/ClearCartCommandHandler.cs

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+using CMSMicroservice.Domain.Events;
+
+namespace CMSMicroservice.Application.UserCartsCQ.Commands.ClearCart;
+
+public class ClearCartCommandHandler : IRequestHandler<ClearCartCommand, ClearCartResponseDto>
+{
+    private readonly IApplicationDbContext _context;
+
+    public ClearCartCommandHandler(IApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<ClearCartResponseDto> Handle(ClearCartCommand request, CancellationToken cancellationToken)
+    {
+        // پیدا کردن تمام آیتم‌های سبد خرید کاربر
+        var cartItems = await _context.UserCartss
+            .Where(c => c.UserId == request.UserId)
+            .ToListAsync(cancellationToken);
+        
+        if (!cartItems.Any())
+        {
+            return new ClearCartResponseDto
+            {
+                UserId = request.UserId,
+                RemovedItemsCount = 0,
+                Message = "سبد خرید خالی است"
+            };
+        }
+        
+        var itemsCount = cartItems.Count;
+        
+        // حذف تمام آیتم‌ها
+        _context.UserCartss.RemoveRange(cartItems);
+        
+        // ثبت Event
+        // می‌تونیم یک Event برای هر آیتم یا یک Event کلی بفرستیم
+        foreach (var item in cartItems)
+        {
+            item.AddDomainEvent(new ClearCartEvent(item));
+        }
+        
+        await _context.SaveChangesAsync(cancellationToken);
+        
+        return new ClearCartResponseDto
+        {
+            UserId = request.UserId,
+            RemovedItemsCount = itemsCount,
+            Message = $"{itemsCount} آیتم از سبد خرید حذف شد"
+        };
+    }
+}

src/CMSMicroservice.Application/UserCartsCQ/Commands/ClearCart/ClearCartCommandValidator.cs

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+namespace CMSMicroservice.Application.UserCartsCQ.Commands.ClearCart;
+
+public class ClearCartCommandValidator : AbstractValidator<ClearCartCommand>
+{
+    public ClearCartCommandValidator()
+    {
+        RuleFor(v => v.UserId)
+            .GreaterThan(0)
+            .WithMessage("شناسه کاربر باید بزرگتر از صفر باشد");
+    }
+}

src/CMSMicroservice.Application/UserCartsCQ/Commands/ClearCart/ClearCartResponseDto.cs

@@ -0,0 +1,8 @@
+namespace CMSMicroservice.Application.UserCartsCQ.Commands.ClearCart;
+
+public class ClearCartResponseDto
+{
+    public long UserId { get; set; }
+    public int RemovedItemsCount { get; set; }
+    public string Message { get; set; }
+}

src/CMSMicroservice.Application/UserCartsCQ/EventHandlers/ClearCartEventHandlers/ClearCartEventHandler.cs

@@ -0,0 +1,23 @@
+using Microsoft.Extensions.Logging;
+using CMSMicroservice.Domain.Events;
+
+namespace CMSMicroservice.Application.UserCartsCQ.EventHandlers.ClearCartEventHandlers;
+
+public class ClearCartEventHandler : INotificationHandler<ClearCartEvent>
+{
+    private readonly ILogger<ClearCartEventHandler> _logger;
+
+    public ClearCartEventHandler(ILogger<ClearCartEventHandler> logger)
+    {
+        _logger = logger;
+    }
+
+    public Task Handle(ClearCartEvent notification, CancellationToken cancellationToken)
+    {
+        _logger.LogInformation("Cart item {CartId} removed for user {UserId}", 
+            notification.Item.Id,
+            notification.Item.UserId);
+        
+        return Task.CompletedTask;
+    }
+}