fengling-risk-control/Fengling.RiskControl.Client/Events/CapEventPublisher.cs

using DotNetCore.CAP;
using Fengling.RiskControl.Configuration;
using Fengling.RiskControl.Evaluation;
using Microsoft.Extensions.Logging;

namespace Fengling.RiskControl.Events;

public interface IRiskEventPublisher
{
    Task PublishRiskAssessmentAsync(RiskEvaluationRequest request, RiskEvaluationResult result);
    Task PublishRiskAlertAsync(RiskEvaluationRequest request, RiskEvaluationResult result);
}

public class CapEventPublisher : IRiskEventPublisher
{
    private readonly ICapPublisher _capPublisher;
    private readonly RiskControlClientOptions _options;
    private readonly ILogger<CapEventPublisher> _logger;

    public CapEventPublisher(
        ICapPublisher capPublisher,
        RiskControlClientOptions options,
        ILogger<CapEventPublisher> logger)
    {
        _capPublisher = capPublisher;
        _options = options;
        _logger = logger;
    }

    public async Task PublishRiskAssessmentAsync(RiskEvaluationRequest request, RiskEvaluationResult result)
    {
        if (!_options.Cap.PublisherEnabled)
        {
            _logger.LogDebug("CAP publisher is disabled, skipping event publish");
            return;
        }

        try
        {
            var @event = new RiskAssessmentEvent
            {
                MemberId = request.MemberId,
                EventType = request.EventType,
                Amount = request.Amount,
                DeviceFingerprint = request.DeviceFingerprint,
                IpAddress = request.IpAddress,
                TotalScore = result.TotalScore,
                RiskLevel = result.RiskLevel.ToString(),
                Blocked = result.Blocked,
                Factors = result.Factors,
                EvaluatedAt = result.EvaluatedAt
            };

            await _capPublisher.PublishAsync("fengling.risk.assessed", @event);
            _logger.LogDebug("Published RiskAssessmentEvent for member {MemberId}", request.MemberId);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to publish RiskAssessmentEvent for member {MemberId}", request.MemberId);
        }
    }

    public async Task PublishRiskAlertAsync(RiskEvaluationRequest request, RiskEvaluationResult result)
    {
        if (!_options.Cap.PublisherEnabled)
            return;

        try
        {
            var @event = new RiskAlertEvent
            {
                MemberId = request.MemberId,
                EventType = request.EventType,
                RiskLevel = result.RiskLevel.ToString(),
                TotalScore = result.TotalScore,
                Blocked = result.Blocked,
                AlertTime = DateTime.UtcNow,
                Priority = result.RiskLevel switch
                {
                    Evaluation.RiskLevel.High => "P0",
                    Evaluation.RiskLevel.Medium => "P1",
                    _ => "P2"
                }
            };

            await _capPublisher.PublishAsync("fengling.risk.alert", @event);
            _logger.LogWarning("Published RiskAlertEvent for member {MemberId}, level={Level}",
                request.MemberId, result.RiskLevel);
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Failed to publish RiskAlertEvent for member {MemberId}", request.MemberId);
        }
    }
}

public class RiskAssessmentEvent
{
    public string MemberId { get; set; } = string.Empty;
    public string EventType { get; set; } = string.Empty;
    public int? Amount { get; set; }
    public string? DeviceFingerprint { get; set; }
    public string? IpAddress { get; set; }
    public int TotalScore { get; set; }
    public string RiskLevel { get; set; } = string.Empty;
    public bool Blocked { get; set; }
    public List<RiskFactorResult> Factors { get; set; } = new();
    public DateTime EvaluatedAt { get; set; }
}

public class RiskAlertEvent
{
    public string MemberId { get; set; } = string.Empty;
    public string EventType { get; set; } = string.Empty;
    public string RiskLevel { get; set; } = string.Empty;
    public int TotalScore { get; set; }
    public bool Blocked { get; set; }
    public DateTime AlertTime { get; set; }
    public string Priority { get; set; } = string.Empty;
}