/// <summary>
/// Checks the server for new, updated and deleted items and returns them.
/// </summary>
/// <returns>A collection with all new, updated and deleted items on serverside.</returns>
public AppointmentSyncCollection GetUpdates()
{
AppointmentSyncCollection returnCollection = new AppointmentSyncCollection();
List <CalDavElement> responseListCalDav = GetAllItemsFromServer();
//Check for new and updated items
foreach (var remoteitem in responseListCalDav)
{
String foundETag = _localStorage.FindEtag(remoteitem.Guid);
if (foundETag == null)
{
returnCollection.AddList.Add(CalDavElementToAppointmentItemConverter.Convert(remoteitem));
_localStorage.WriteEntry(remoteitem.Guid, remoteitem.ETag, remoteitem.Url);
}
else if (foundETag != remoteitem.ETag)
{
returnCollection.UpdateList.Add(CalDavElementToAppointmentItemConverter.Convert(remoteitem));
_localStorage.EditETag(remoteitem.Guid, remoteitem.ETag);
}
}
;
//Check for deleted items
Boolean deleted;
OutlookAppointment deletedAppointment = new OutlookAppointment();
List <String> guidsToDelete = new List <String>();
foreach (var localitem in _localStorage.GetAll())
{
deleted = true;
foreach (var remoteitem in responseListCalDav)
{
if (remoteitem.Guid.Equals(localitem.Key))
{
deleted = false;
}
}
if (deleted)
{
deletedAppointment.SyncID = localitem.Key;
returnCollection.DeleteList.Add(deletedAppointment);
guidsToDelete.Add(localitem.Key);
}
}
foreach (var item in guidsToDelete)
{
_localStorage.DeleteEntry(item);
}
return(returnCollection);
}
