private void findDeletedTopics(TopicToken original, TopicToken @new)
{
var deletedTopics = original.All().Where(x => @new.Find(x.Id) == null)
.Select(x => new DeleteTopic(x));
_deltas.AddRange(deletedTopics);
}
public IEnumerable <IDelta> DetermineDeltas(TopicToken originalRoot)
{
var original = originalRoot.Find(Id);
if (original == null)
{
yield return(new NewTopic(this));
}
else
{
if (original.File != File)
{
yield return(new MoveTopic(original.File, File));
}
if (original.Title != Title)
{
yield return(new RewriteTitle(File, Title));
}
if (original.Url != Url)
{
yield return(new RewriteUrl(File, Url));
}
}
}