/// <summary>
/// Pushes the given state into storage.
/// </summary>
/// <param name="viewModel"> The ViewModel that the state belongs to. </param>
/// <param name="activationData"> Data the ViewModel was activated with. </param>
/// <param name="navigationState"> The state of platform navigation. </param>
public async Task PushStateAsync(object viewModel, object activationData, string navigationState)
{
var states = await this.GetAllStatesAsync();
var attribute = viewModel.GetType().GetTypeInfo().GetCustomAttribute<StatePersistenceBehaviorAttribute>();
var vmType = viewModel.GetType();
if (attribute != null)
{
switch (attribute.StatePersistenceBehaviorType)
{
case StatePersistenceBehaviorType.ActivationAndState:
break;
case StatePersistenceBehaviorType.StateOnly:
activationData = null;
break;
case StatePersistenceBehaviorType.None:
activationData = null;
viewModel = null;
break;
}
}
var state = new State
{
ActivationData = activationData,
ViewModelState = this.GetViewModelStateLazy(viewModel),
ViewModelType = vmType
};
states.Add(state);
}
private StateWrapper SerializeState(State state)
{
var vmState = state.ViewModelState.Value;
return new StateWrapper
{
ActivationData = JsonConvert.SerializeObject(state.ActivationData),
ActivationDataType = state.ActivationData?.GetType().AssemblyQualifiedName ?? string.Empty,
ViewModelState = JsonConvert.SerializeObject(vmState),
ViewModelStateType = vmState?.GetType().AssemblyQualifiedName ?? string.Empty,
ViewModelType = state.ViewModelType?.AssemblyQualifiedName ?? string.Empty
};
}
