AuditingPersistence pseudocode

apseduo.cs

public ObjRepository : IObjRepository
{
	public Obj Add(Obj newObj)
	{
		Audited<Obj> newAuditedObj = new AuditPersist.Audited<Obj>(Obj newObj);
		Audited<Obj> persistedAuditedObj = CI.Add<Audited<Obj>>("objbucket", newAuditedObj);
		return newAuditedObj.CurrentState();
	}
		
	private Audited<Obj> GetAudited(Guid objId)
	{
		Audited<Obj> existingAuditedObj = CI.Get<Audited<Obj>>("objbucket", objId);
		if (existingAuditedObj.HasSiblings)
		{
			Obj[] siblings = GetSiblings(existingAuditedObj.Siblings);
			Audited<Obj> mergedAuditedObj = AuditPersist.Merge<Audited<Obj>>(siblings);
			existingAuditedObj = CI.Update<Audited<Obj>>(mergedAuditedObj);
		}
		return existingAuditedObj;
	}
		
	public Obj Get(Guid objId)
	{
		return GetAudited(objId).CurrentState();
	}
	
	public AuditLog GetAuditLog(Guid objId)
	{
		return GetAudited(objId).AuditLog();
	}

	public Obj Update(Obj obj)
	{
		Audited<Obj> existingAuditedObj = GetAudited(obj.Id);
		Audited<Obj> updatedAuditedObj = existingAuditedObj.Delta(obj);
		return CI.Update<Audited<Obj>>(updatedAuditedObj).CurrentState();
	}
		
	public void Delete(Guid objId)
	{
		CI.Delete("objbucket",objId);
	}
}

namespace AuditPersist
{
	public Audited<T>
	{
		public Audited(T obj)
		{
			this.Original = obj;
			this.AuditLog = new List<AuditEntry>();
		}
		public T Original { set; }
		public Audited<T> Delta(T obj)
		{
			Audited<T> deltaAuditedObj = new Audited<T>(this.Original);
			deltaAuditedObj.AuditLog = this.AuditLog;
			AuditEntry diffs = DiffingMagic(this.CurrentState(),obj);
			deltaAuditedObj.AuditLog.Add(diffs);
			return deltaAuditedObject;
		}
		public T CurrentState()
		{
			return SummingMagic(this);
		}
		public List<AuditEntry> AuditLog {get; set;}
		private AuditEntry DiffingMagic(T then, T now)
		{
			//Do magic
			return auditEntry;
		}
		private T SummingMagic(Audited<T> auditedObj)
		{
			//Do magic
			return obj;
		}
	}
	
	public AuditEntry
	{
		List<string> Deletes {get; set;}
		Dictionary<string, string> Updates {get; set;}
		DateTime TimeStamp {get; set;}
		Guid UserId {get; set;}
		String UserName {get; set;}
	}
}