/// <summary>
/// Sync local GGItem to GG calendar
/// </summary>
/// <param name="addToLocal">List of GGItems to be added to local GGList</param>
/// <param name="removeFromLocal">List of GGItems to be removed from local GGList</param>
/// <param name="GGService">Google calendar service object</param>
/// <param name="GGCalendar">GG calendar</param>
/// <param name="GGEvents">Google event query results</param>
/// <param name="server">List of bools to indicate if a Google event has a local version</param>
/// <param name="ggItem">The local GGItem to be synced</param>
private void SyncFromLocalToServer(List<GGItem> addToLocal, List<GGItem> removeFromLocal, CalendarService GGService, CalendarEntry GGCalendar, EventFeed GGEvents, List<bool> server, GGItem ggItem)
{
if (ggItem.GetEventAbsoluteUrl() == String.Empty)
{ // Not synced : add to GG Calendar
Log("Never synced");
ggItem.SetEventAbsoluteUrl(AddGGEvent(GGService, GGCalendar, ggItem));
Log("Add to server: " + ggItem.ToString());
}
else
{ // Synced before
Log("Synced before");
string id = ggItem.GetEventAbsoluteUrl();
// Find the coresponding Google event
AtomEntry theEvent = FindGoogleEvent(GGEvents, server, id);
if (theEvent == null)
{ // Not found: deleted on GG calendar : remove from local list
Log("Event is deleted on server");
removeFromLocal.Add(ggItem);
Log("Removed in local list");
}
else
{ // Found
SolveConflict(addToLocal, removeFromLocal, GGService, GGCalendar, ggItem, theEvent);
}
}
}
/// <summary>
/// Solve conflict by comparing last modified time
/// </summary>
/// <param name="addToLocal">List of GGItems to be added to local GGList</param>
/// <param name="removeFromLocal">List of GGItems to be removed from local GGList</param>
/// <param name="GGService">Google calendar service object</param>
/// <param name="GGCalendar">GG calendar</param>
/// <param name="ggItem">The local GGItem to be compared</param>
/// <param name="theEvent">The Google event to be compared</param>
private void SolveConflict(List<GGItem> addToLocal, List<GGItem> removeFromLocal, CalendarService GGService, CalendarEntry GGCalendar, GGItem ggItem, AtomEntry theEvent)
{
if (theEvent.Updated.CompareTo(ggItem.GetLastModifiedTime()) < 0)
{ // Local is the latest version : delete on server, then add the latest one
Log("Local is the latest");
theEvent.Delete();
Log("Delete on server");
ggItem.SetEventAbsoluteUrl(AddGGEvent(GGService, GGCalendar, ggItem));
Log("Add to server: " + ggItem.ToString());
}
else
{ // Server is the latest version : delete on local, then add the latest one
Log("Server is the latest");
EventEntry e = (EventEntry)theEvent;
GGItem newGGItem = new GGItem(e.Title.Text, e.Times[0].EndTime, ExtractTagFromContents(e.Content.Content), DateTime.Parse(e.Updated.ToLongTimeString()), e.Id.AbsoluteUri, ExtractPathFromContents(e.Content.Content));
removeFromLocal.Add(ggItem);
addToLocal.Add(newGGItem);
Log("Update to lsocal: " + newGGItem.ToString());
}
}