// Live doesn't need to be diffed; just diff against the server shadow and that will show what has changed
//public D DiffApplyLive()
//{
// var liveDiff = Live.PollForLocalDifferencesOrNull();
// if (liveDiff != null)
// {
// Live.Apply(liveDiff, null, false);
// // Save the time these local modifications where made to which field, and add to the timestamp dictionary,
// // so that we can ensure we always send if we have the latest, or receive the latest if we don't:
// }
// return liveDiff;
//}
public D DiffApplyShadow(DateTime newDiffTimestamp)
{
if (Global.ENABLEDEBUGINFO)
{
Debug.WriteLine("DiffApplyShadow");
}
// 1 a & b : Take Live client vs Shadow (last server sync) difference as a diff, which gives local updates relative to server shadow
var diff = Live.DiffAgainst(Shadow, newDiffTimestamp);
if (diff != null)
{
Live.Version++;
if (Global.ENABLEDEBUGINFO)
{
Debug.WriteLine("Live version =" + Live.Version);
}
// 2 : Save the diff in the unconfirmed stack edit to be sent to our peer
UnconfirmedEdits.Add(diff);
// 3 : Apply the diff from live to our shadow, now that we have sent out the edit that will bring our peer up to date.
Shadow.Apply(diff, null, true);
Shadow.Version = Live.Version;
}
return(diff);
}
public List <D> ProcessEditsToShadow(Message <D> LatestEditsReceived)
{
var editsApplied = new List <D>();
if (LatestEditsReceived == null)
{
return(editsApplied);
}
// Either backupshadow or shadow should match the peer's version given
foreach (var edit in LatestEditsReceived.Get().OrderBy(e => e.Version))
{
if (edit.Version != Shadow.PeerVersion)
{
continue;
}
// Apply these changes to the shadow
Shadow.Apply(edit, LatestEditsReceived.IsResponse, true);
Shadow.PeerVersion++;
editsApplied.Add(edit);
}
return(editsApplied);
}