petwash/PetWash.Api/Controllers/PaymentsController.cs

using Microsoft.AspNetCore.Mvc;
using PetWash.Api.Services;

namespace PetWash.Api.Controllers;

[ApiController]
[Route("api/payments/wechat")]
public class PaymentsController : ControllerBase
{
    private readonly OrderService _orderService;
    private readonly WeChatPayService _weChatPayService;
    private readonly ILogger<PaymentsController> _logger;

    public PaymentsController(
        OrderService orderService,
        WeChatPayService weChatPayService,
        ILogger<PaymentsController> logger)
    {
        _orderService = orderService;
        _weChatPayService = weChatPayService;
        _logger = logger;
    }

    [HttpPost("notify")]
    public async Task<IActionResult> Notify(CancellationToken cancellationToken)
    {
        using var reader = new StreamReader(Request.Body);
        var body = await reader.ReadToEndAsync(cancellationToken);

        try
        {
            var notification = await _weChatPayService.ParsePaymentNotificationAsync(
                body,
                Request.Headers,
                cancellationToken);

            if (string.Equals(notification.TradeState, "SUCCESS", StringComparison.OrdinalIgnoreCase))
            {
                var order = await _orderService.ConfirmPaymentAsync(notification.OrderId);
                if (order == null)
                {
                    _logger.LogWarning(
                        "WeChat payment notification references a missing order. OrderId={OrderId}, OutTradeNo={OutTradeNo}",
                        notification.OrderId,
                        notification.OutTradeNo);
                }
            }

            return Ok(new { code = "SUCCESS", message = "成功" });
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to process WeChat payment notification.");
            return BadRequest(new { code = "FAIL", message = ex.Message });
        }
    }
}