public override int SaveChanges()
{
IEnumerable <DbEntityEntry> modifiedEntities = ChangeTracker.Entries().Where(p => p.State == EntityState.Modified || p.State == EntityState.Deleted);
foreach (DbEntityEntry change in modifiedEntities)
{
EntityState state = change.State;
IRastreavel rastreavel = change.Entity as IRastreavel;
BaseModelo baseModelo = change.Entity as BaseModelo;
if (rastreavel == null)
{
continue;
}
string nomeEntidade = change.Entity.GetType().Name;
foreach (string prop in change.OriginalValues.PropertyNames)
{
if (state == EntityState.Modified)
{
RastrearUpdate(change, prop, nomeEntidade, rastreavel, baseModelo);
}
else
{
RastrearDelete(change, prop, nomeEntidade, rastreavel, baseModelo);
}
}
}
return(base.SaveChanges());
}
private void RastrearUpdate(DbEntityEntry change, string prop, string nomeEntidade, IRastreavel rastreavel, BaseModelo baseModelo)
{
if (change.OriginalValues[prop] == null || change.CurrentValues[prop] == null)
{
return;
}
string originalValue = change.OriginalValues[prop].ToString();
string currentValue = change.CurrentValues[prop].ToString();
if (originalValue == currentValue)
{
return;
}
Rastro rastro = new Rastro(nomeEntidade, baseModelo.Id, prop, originalValue, currentValue, TipoRastro.Update);
Rastros.Add(rastro);
}
private void RastrearDelete(DbEntityEntry change, string prop, string nomeEntidade, IRastreavel rastreavel, BaseModelo baseModelo)
{
if (change.OriginalValues[prop] != null)
{
string originalValue = change.OriginalValues[prop].ToString();
Rastro rastro = new Rastro(nomeEntidade, baseModelo.Id, prop, originalValue, null, TipoRastro.Delete);
Rastros.Add(rastro);
}
}
