feat: Implement Approve and Reject Withdrawal commands with handlers

src/CMSMicroservice.Application/CommissionCQ/Commands/RejectWithdrawal/RejectWithdrawalCommand.cs

@@ -0,0 +1,7 @@
+namespace CMSMicroservice.Application.CommissionCQ.Commands.RejectWithdrawal;
+
+public class RejectWithdrawalCommand : IRequest<Unit>
+{
+    public long PayoutId { get; set; }
+    public string Reason { get; set; } = string.Empty;
+}

src/CMSMicroservice.Application/CommissionCQ/Commands/RejectWithdrawal/RejectWithdrawalCommandHandler.cs

@@ -0,0 +1,54 @@
+using CMSMicroservice.Domain.Enums;
+using CMSMicroservice.Application.Common.Exceptions;
+
+namespace CMSMicroservice.Application.CommissionCQ.Commands.RejectWithdrawal;
+
+public class RejectWithdrawalCommandHandler : IRequestHandler<RejectWithdrawalCommand, Unit>
+{
+    private readonly IApplicationDbContext _context;
+
+    public RejectWithdrawalCommandHandler(IApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<Unit> Handle(RejectWithdrawalCommand request, CancellationToken cancellationToken)
+    {
+        var payout = await _context.UserCommissionPayouts
+            .FirstOrDefaultAsync(x => x.Id == request.PayoutId, cancellationToken);
+
+        if (payout == null)
+        {
+            throw new NotFoundException($"Payout با شناسه {request.PayoutId} یافت نشد");
+        }
+
+        if (payout.Status != CommissionPayoutStatus.WithdrawRequested)
+        {
+            throw new BadRequestException($"فقط درخواست‌های در وضعیت WithdrawRequested قابل رد هستند");
+        }
+
+        // Update status to Cancelled (rejected)
+        payout.Status = CommissionPayoutStatus.Cancelled;
+        payout.LastModified = DateTime.UtcNow;
+
+        // TODO: Add PayoutHistory record with rejection reason
+        // var history = new CommissionPayoutHistory
+        // {
+        //     PayoutId = payout.Id,
+        //     UserId = payout.UserId,
+        //     WeekNumber = payout.WeekNumber,
+        //     AmountBefore = payout.TotalAmount,
+        //     AmountAfter = payout.TotalAmount,
+        //     OldStatus = (int)CommissionPayoutStatus.Pending,
+        //     NewStatus = (int)CommissionPayoutStatus.Rejected,
+        //     Action = (int)CommissionPayoutAction.Rejected,
+        //     PerformedBy = "Admin", // TODO: Get from authenticated user
+        //     Reason = request.Reason,
+        //     Created = DateTime.UtcNow
+        // };
+        // _context.CommissionPayoutHistories.Add(history);
+
+        await _context.SaveChangesAsync(cancellationToken);
+        return Unit.Value;
+    }
+}