proposal-system/api/src/ProposalSystem.Infrastructure/Services/AuditService.cs

using System.Text.Json;
using ProposalSystem.Application.Interfaces;
using ProposalSystem.Domain.Entities;
using ProposalSystem.Infrastructure.Data;

namespace ProposalSystem.Infrastructure.Services;

public class AuditService : IAuditService
{
    private readonly ProposalDbContext _db;
    private readonly ICurrentUserService _currentUser;

    public AuditService(ProposalDbContext db, ICurrentUserService currentUser)
    {
        _db = db;
        _currentUser = currentUser;
    }

    public async Task LogAsync(AuditAction action, Guid? proposalId, string? details = null, CancellationToken ct = default)
    {
        var jsonDetails = details != null
            ? JsonSerializer.Serialize(new { message = details })
            : null;

        var entry = new AuditLog
        {
            Id = Guid.NewGuid(),
            ProposalId = proposalId,
            UserId = _currentUser.UserId,
            Action = action,
            Details = jsonDetails,
            Timestamp = DateTime.UtcNow,
            IpAddress = _currentUser.IpAddress,
        };

        _db.AuditLogs.Add(entry);
        await _db.SaveChangesAsync(ct);
    }
}