// Add new dialog or fetch existing one.
public static Dialog LoadDialog(string login)
{
// Fetch user data.
var anotherUser = AppUser.GetInstance().Client.FetchUser(login);
if (anotherUser != null)
{
// Construct new dialog.
var dialog = new Dialog()
{
Partner = anotherUser
};
dialog.Messages = GetDialogMessages(dialog);
// Assume that if dialog exist it contains messages.
if (dialog.Messages != null && dialog.Messages.Count > 0)
{
// Try to restore dialog key.
TryToRestoreKeyFromDialog(ref dialog);
return(dialog);
}
// Client method call.
if (AppUser.GetInstance().Client.AddDialog(anotherUser))
{
// Generate key.
var aesKey = AesKey.GenerateKey();
dialog.LoadKey(aesKey);
// Send message.
SendKeyExchangeMessage(dialog);
return(dialog);
}
}
Logger.Info("Unable to load another user.");
return(null);
}