Files
2026-10-22 12:31:37 +02:00

368 lines
12 KiB
C#

using System.Reflection;
using System.Security.Claims;
using System.Text.Json;
using Castle.DynamicProxy;
using FluentResults;
using Microsoft.AspNetCore.Http;
using PostFundManagement.Application.Services.Shared;
using PostFundManagement.Domain.Attributes;
namespace PostFundManagement.Application.Interceptors;
public sealed class AuditInterceptor(AuditService auditService, IHttpContextAccessor httpContextAccessor) : IAsyncInterceptor
{
public void InterceptSynchronous(IInvocation invocation)
{
var method = invocation.MethodInvocationTarget ?? invocation.Method;
var auditAttr = method.GetCustomAttribute<AuditAttribute>()
?? invocation.Method.GetCustomAttribute<AuditAttribute>();
if (auditAttr == null)
{
invocation.Proceed();
return;
}
try
{
invocation.Proceed();
AuditAction(invocation, invocation.ReturnValue, null);
}
catch (Exception ex)
{
AuditAction(invocation, null, ex);
throw;
}
}
public void InterceptAsynchronous(IInvocation invocation) =>
invocation.ReturnValue = InternalInterceptAsynchronous(invocation);
public void InterceptAsynchronous<TResult>(IInvocation invocation) =>
invocation.ReturnValue = InternalInterceptAsynchronous<TResult>(invocation);
private async Task InternalInterceptAsynchronous(IInvocation invocation)
{
var method = invocation.MethodInvocationTarget ?? invocation.Method;
var auditAttr = method.GetCustomAttribute<AuditAttribute>()
?? invocation.Method.GetCustomAttribute<AuditAttribute>();
if (auditAttr == null)
{
invocation.Proceed();
var t = (Task)invocation.ReturnValue;
await t.ConfigureAwait(false);
return;
}
try
{
invocation.Proceed();
var task = (Task)invocation.ReturnValue;
await task.ConfigureAwait(false);
await AuditActionAsync(invocation, null, null).ConfigureAwait(false);
}
catch (Exception ex)
{
await AuditActionAsync(invocation, null, ex).ConfigureAwait(false);
throw;
}
}
private async Task<TResult> InternalInterceptAsynchronous<TResult>(IInvocation invocation)
{
var method = invocation.MethodInvocationTarget ?? invocation.Method;
var auditAttr = method.GetCustomAttribute<AuditAttribute>()
?? invocation.Method.GetCustomAttribute<AuditAttribute>();
if (auditAttr == null)
{
invocation.Proceed();
var t = (Task<TResult>)invocation.ReturnValue;
return await t.ConfigureAwait(false);
}
TResult resultObj;
try
{
invocation.Proceed();
var task = (Task<TResult>)invocation.ReturnValue;
resultObj = await task.ConfigureAwait(false);
}
catch (Exception ex)
{
await AuditActionAsync(invocation, null, ex).ConfigureAwait(false);
throw;
}
await AuditActionAsync(invocation, resultObj, null).ConfigureAwait(false);
return resultObj;
}
private async Task AuditActionAsync(IInvocation invocation, object? resultObj, Exception? exception)
{
try
{
var method = invocation.MethodInvocationTarget ?? invocation.Method;
var action = ResolveActionName(method.Name);
var entityName = ResolveEntityName(method, resultObj, invocation.Arguments);
var entityId = ResolveEntityId(resultObj, invocation.Arguments);
var changes = BuildPayloadSummary(method.GetParameters(), invocation.Arguments);
var performedBy = ResolveUserId();
var tenantId = ResolveTenantId(invocation.Arguments);
if (exception != null)
{
var errorDetails = $"[Exception] {exception.GetType().Name}: {exception.Message}\n{exception.StackTrace}";
await auditService.LogActionAsync(
entityId: entityId,
entityName: entityName,
action: action,
changes: changes,
performedBy: performedBy,
error: errorDetails,
tenantId: tenantId).ConfigureAwait(false);
return;
}
if (resultObj is IResultBase result)
{
if (result.IsSuccess)
{
await auditService.LogActionAsync(
entityId: entityId,
entityName: entityName,
action: action,
changes: changes,
performedBy: performedBy,
error: null,
tenantId: tenantId).ConfigureAwait(false);
}
else if (result.IsFailed)
{
var errorMessages = new List<string>();
if (result.Reasons != null)
{
foreach (var reason in result.Reasons)
{
if (reason is IExceptionalError exceptionalError)
errorMessages.Add($"{exceptionalError.Message} ({exceptionalError.Exception.GetType().Name}: {exceptionalError.Exception.Message})\n{exceptionalError.Exception.StackTrace}");
else if (reason is IError error)
errorMessages.Add(error.Message);
}
}
var rawErrorType = result.Reasons?.FirstOrDefault()?.GetType().Name.Replace("Error", string.Empty);
var errorType = string.IsNullOrWhiteSpace(rawErrorType) || rawErrorType == "Reason" ? "Error" : rawErrorType;
var errorsString = string.Join("; ", errorMessages);
var errorDetails = $"[{errorType}] {errorsString}";
await auditService.LogActionAsync(
entityId: entityId,
entityName: entityName,
action: action,
changes: changes,
performedBy: performedBy,
error: errorDetails,
tenantId: tenantId).ConfigureAwait(false);
}
}
else
{
await auditService.LogActionAsync(
entityId: entityId,
entityName: entityName,
action: action,
changes: changes,
performedBy: performedBy,
error: null,
tenantId: tenantId).ConfigureAwait(false);
}
}
catch
{
/* eat all exceptions, don't interrupt program flow */
}
}
private void AuditAction(IInvocation invocation, object? resultObj, Exception? exception)
{
try
{
AuditActionAsync(invocation, resultObj, exception).GetAwaiter().GetResult();
}
catch
{
/* eat all exceptions, don't interrupt program flow */
}
}
private static long? ResolveTenantId(object[] args)
{
foreach (var arg in args)
{
if (arg == null || arg is CancellationToken or IFormFile) continue;
var prop = arg.GetType().GetProperty("TenantId");
if (prop != null)
{
var val = prop.GetValue(arg);
if (val is long l && l > 0) return l;
if (val is int i && i > 0) return i;
if (val is string s && long.TryParse(s, out var parsed) && parsed > 0) return parsed;
}
}
return null;
}
private static string ResolveActionName(string methodName) =>
methodName.EndsWith("Async", StringComparison.Ordinal)
? methodName[..^5]
: methodName;
private static string ResolveEntityName(MethodInfo method, object? resultObj, object[] args)
{
var returnType = method.ReturnType;
Type? innerType = null;
if (returnType.IsGenericType)
{
var genericDef = returnType.GetGenericTypeDefinition();
if (genericDef == typeof(Task<>))
innerType = returnType.GetGenericArguments()[0];
}
if (innerType != null && innerType.IsGenericType && typeof(IResultBase).IsAssignableFrom(innerType))
{
var valueType = innerType.GetGenericArguments().FirstOrDefault();
if (valueType != null && valueType != typeof(bool) && valueType != typeof(int) && valueType != typeof(string))
return valueType.Name;
}
foreach (var arg in args)
{
if (arg == null || arg is CancellationToken or IFormFile) continue;
var argTypeName = arg.GetType().Name;
if (argTypeName.EndsWith("Request", StringComparison.Ordinal))
{
var trimmed = argTypeName[..^7];
return trimmed.Replace("Create", "").Replace("Update", "");
}
}
return ResolveActionName(method.Name);
}
private static string ResolveEntityId(object? resultObj, object[] args)
{
if (resultObj != null)
{
var valueProp = resultObj.GetType().GetProperty("Value");
if (valueProp != null)
{
var value = valueProp.GetValue(resultObj);
if (value != null)
{
var idProp = value.GetType().GetProperty("Id") ?? value.GetType().GetProperty("id");
if (idProp != null)
{
var idVal = idProp.GetValue(value);
if (idVal != null) return idVal.ToString()!;
}
}
}
}
foreach (var arg in args)
{
if (arg is long or int or Guid or string)
return arg.ToString()!;
if (arg != null && arg is not CancellationToken and not IFormFile)
{
var idProp = arg.GetType().GetProperty("Id") ?? arg.GetType().GetProperty("id");
if (idProp != null)
{
var idVal = idProp.GetValue(arg);
if (idVal != null) return idVal.ToString()!;
}
}
}
return "N/A";
}
private static string[] BuildPayloadSummary(ParameterInfo[] parameters, object[] args)
{
var entries = new List<string>();
for (var i = 0; i < parameters.Length; i++)
{
var param = parameters[i];
var arg = args[i];
if (param.ParameterType == typeof(CancellationToken))
continue;
if (arg == null)
{
entries.Add($"{param.Name}: null");
continue;
}
if (arg is IFormFile file)
{
entries.Add($"{param.Name}: [File] Name='{file.FileName}', Size={file.Length} bytes, Type='{file.ContentType}'");
continue;
}
if (arg is IEnumerable<IFormFile> files)
{
var fileSummaries = files.Select(f => $"'{f.FileName}' ({f.Length} bytes)");
entries.Add($"{param.Name}: [Files] count={fileSummaries.Count()} [{string.Join(", ", fileSummaries)}]");
continue;
}
if (arg is Stream stream)
{
entries.Add($"{param.Name}: [Stream] Length={(stream.CanSeek ? stream.Length : -1)} bytes");
continue;
}
try
{
var json = JsonSerializer.Serialize(arg);
entries.Add($"{param.Name}: {json}");
}
catch
{
entries.Add($"{param.Name}: [Unserializable]");
}
}
return [.. entries];
}
private Guid ResolveUserId()
{
var user = httpContextAccessor.HttpContext?.User;
var sub = user?.FindFirst(ClaimTypes.NameIdentifier)?.Value ?? user?.FindFirst("sub")?.Value;
return Guid.TryParse(sub, out var guid) ? guid : Guid.Empty;
}
}