private void Load()
{
_contacts.Clear();
var contacts = _persister.Read();
if (contacts == null)
{
return;
}
foreach (var contact in contacts)
{
_contacts.Add(contact);
}
}
public List <UpdatableElement> Update(string projectId, long from, List <UpdatableElement> toSynchronize)
{
lock (string.Intern(projectId))
{
var currentState = persister.Read(projectId);
//first we update the current state
foreach (var updatedTransaction in toSynchronize)
{
var id = updatedTransaction.id;
//It is a new transaction, we just add it, else we might have to remove a previous version.
if (currentState.Count(o => o.id == id) != 0)
{
var existingTransaction = currentState.First(o => o.id == id);
if (existingTransaction.lastUpdated < updatedTransaction.lastUpdated)
{
//Then we update
currentState.Remove(existingTransaction);
}
else
{
//else the existing transaction is newer, so we keep the newest state.
//We ignore the out of date update
continue;
}
}
var newStateTransaction = updatedTransaction;
newStateTransaction.lastUpdated = DateTime.Now.JavascriptTicks();
currentState.Add(newStateTransaction);
}
if (currentState.Any())
{
persister.Persist(projectId, currentState);
}
return(currentState.Where(o => o.lastUpdated >= from).ToList());
}
}