/// <summary>
/// Injects the values from the current event trace into the supplied object
/// </summary>
public static object InjectTraceValues <T>(this IAuditLog auditLog, object obj)
{
var doc = XDocument.Parse(auditLog.AuditDetails);
foreach (var element in doc.Root.Elements("Property"))
{
var trace = AuditLogEventTrace.FromXml <T>(element, obj.GetType());
var pi = PropertyHelper.GetPropertyInfo(obj.GetType(), trace.PropertyName);
if (pi == null || pi.GetSetMethod() == null)
{
continue;
}
var originalType = trace.OriginalValue.GetType();
if (originalType.Implements <IDwarf>())
{
originalType = originalType.BaseType;
}
var val = originalType == pi.PropertyType ? trace.OriginalValue : Convert.ChangeType(trace.OriginalValue, pi.PropertyType.IsNullable() ? Nullable.GetUnderlyingType(pi.PropertyType) : pi.PropertyType);
pi.SetValue(obj, val, null);
}
return(obj);
}
/// <summary>
/// Returns true if an event trace of the supplied property in the audit log is found
/// </summary>
public static bool ContainsLogData <T>(this IAuditLog auditLog, Expression <Func <T, object> > expression)
{
if (string.IsNullOrEmpty(auditLog.AuditDetails))
{
return(false);
}
var doc = XDocument.Parse(auditLog.AuditDetails);
foreach (var element in doc.Root.Elements("Property"))
{
var trace = AuditLogEventTrace.FromXml <T>(element);
if (trace.PropertyName.Equals(ReflectionHelper.GetPropertyName(expression)))
{
return(true);
}
}
return(false);
}
/// <summary>
/// Finds the event trace of the supplied property in the audit log
/// and returns, if possible, a typed array of the values; OriginalValue | NewValue
/// </summary>
public static dynamic GetLogData <T, TY>(this IAuditLog auditLog, Expression <Func <T, TY> > expression)
{
if (string.IsNullOrEmpty(auditLog.AuditDetails))
{
return(null);
}
var doc = XDocument.Parse(auditLog.AuditDetails);
foreach (var element in doc.Root.Elements("Property"))
{
var trace = AuditLogEventTrace.FromXml <T>(element);
if (trace.PropertyName.Equals(ReflectionHelper.GetPropertyName(expression)))
{
IDictionary <string, object> result = new ExpandoObject();
result["OldValue"] = (TY)Convert.ChangeType(trace.OriginalValue, typeof(TY));
result["NewValue"] = (TY)Convert.ChangeType(trace.NewValue, typeof(TY));
return(result);
}
}
throw new InvalidOperationException("No events found for " + ReflectionHelper.GetPropertyName(expression));
}
/// <summary>
/// Returns all AuditLogEventTraces for the current AuditLog
/// </summary>
public static IEnumerable <AuditLogEventTrace> AuditLogEventTraces <T>(this IAuditLog auditLog, Type type)
{
return(string.IsNullOrEmpty(auditLog.AuditDetails)
? new List <AuditLogEventTrace>()
: XDocument.Parse(auditLog.AuditDetails).Root.Elements("Property").Select(x => AuditLogEventTrace.FromXml <T>(x, type)));
}
