private void RegisterCallerForStateTracking(string caller)
{
var instanceType = TypeDescriptor.GetReflectionType(this);
var propertyInfo = caller != null?instanceType.GetProperty(caller) : null;
var dateTime = DateTime.Now;
var infoString = $"{propertyInfo?.ReflectedType.Name}.{propertyInfo?.Name}";
var key = $"{dateTime.ToLongTimeString()}.{dateTime.Millisecond} {(infoString.Length > 1 ? infoString : $"{dateTime.ToLongTimeString()}.{dateTime.Millisecond} {GetType().ToString()}")}";
if (propertyInfo is null)
{
// in case of Collection.Add the constructor of added class should fire NotifyPropertyChanged
_mementoService.RegisterObject(this);
_mementoHashtable.Add(key, this);
return;
}
var propertyValueType = propertyInfo.GetValue(this);
if (propertyValueType is INotifyCollectionChanged notifyCollectionChanged)
{
// double registration will be checked by MementoService it self
_mementoService.RegisterCollection(notifyCollectionChanged);
key += COLLECTION_INDICATOR;
}
else if (propertyValueType is INotifyPropertyChanged notifyPropertyChanged)
{
// double registration will be checked by MementoService it self
_mementoService.RegisterObject(notifyPropertyChanged);
key += OBJECT_INDICATOR;
}
_mementoHashtable.Add(key, propertyValueType);
}
/// <summary>
/// Initializes a new instance of the <see cref="PersonViewModel"/> class.
/// </summary>
/// <param name="person">The person.</param>
public PersonViewModel(Person person, IMementoService mementoService)
{
_mementoService = mementoService;
Person = person ?? new Person();
Undo = new Command(() => _mementoService.Undo(), () => _mementoService.CanUndo);
Redo = new Command(() => _mementoService.Redo(), () => _mementoService.CanRedo);
GenerateData = new Command<object, object>(OnGenerateDataExecute, OnGenerateDataCanExecute);
ToggleCustomError = new Command<object>(OnToggleCustomErrorExecute);
_mementoService.RegisterObject(this);
}
/// <summary>
/// Initializes a new instance of the <see cref="PersonViewModel"/> class.
/// </summary>
/// <param name="person">The person.</param>
public PersonViewModel(Person person, IMementoService mementoService)
{
_mementoService = mementoService;
Person = person ?? new Person();
Undo = new Command(() => _mementoService.Undo(), () => _mementoService.CanUndo);
Redo = new Command(() => _mementoService.Redo(), () => _mementoService.CanRedo);
GenerateData = new Command <object, object>(OnGenerateDataExecute, OnGenerateDataCanExecute);
ToggleCustomError = new Command <object>(OnToggleCustomErrorExecute);
_mementoService.RegisterObject(this);
}
