ANTOOZA-BACKEND/Application/Features/Admin/Payment/Toss/Cancel/Get/Handler.cs

using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Microsoft.EntityFrameworkCore;

namespace Application.Features.Admin.Payment.Toss.Cancel.Get;

public sealed class Handler(IAppDbContext db) : IQueryHandler<Query, Response>
{
    public async Task<Response> Handle(Query request, CancellationToken ct)
    {
        var cancel = await db.TossCancel.AsNoTracking().Include(c => c.Member).FirstOrDefaultAsync(c => c.ID == request.ID, ct) ?? throw new InvalidOperationException("토스 취소 내역을 찾을 수 없습니다.");

        return new Response
        {
            ID = cancel.ID,
            MemberID = cancel.MemberID,
            MemberEmail = cancel.Member?.Email ?? string.Empty,
            MemberName = cancel.Member?.Name,
            PaymentKey = cancel.PaymentKey,
            OrderID = cancel.OrderID,
            CancelAmount = cancel.CancelAmount,
            CancelReason = cancel.CancelReason,
            CancelRequester = cancel.CancelRequester,
            ResponseCode = cancel.ResponseCode,
            ResponseMessage = cancel.ResponseMessage,
            Status = cancel.Status,
            TransactionKey = cancel.TransactionKey,
            CanceledAt = cancel.CanceledAt,
            CreatedAt = cancel.CreatedAt,
            UpdatedAt = cancel.UpdatedAt
        };
    }
}