public override On <TState> CreateParentReducer(On <TFeatureState> on)
{
var parentStateProperties = typeof(TState).GetProperties();
return(new On <TState>
{
Reduce = (state, action) =>
{
if (on?.Reduce == null)
{
return state;
}
var featureState = _featureSelector(state);
var reducerResult = on.Reduce(featureState, action);
if (featureState.IsDeepEqual(reducerResult))
{
return state;
}
var featureProperty = parentStateProperties
.SingleOrDefault(p =>
{
return p.GetValue(state) == featureState;
});
if (featureProperty == null)
{
throw new NotSupportedException(
$"A sub-reducer cannot find the feature reducer of `{typeof(TFeatureState).Name}` inside `{typeof(TState).Name}`."
);
}
var stateCopy = state.Copy();
featureProperty.SetValue(stateCopy, reducerResult);
return stateCopy;
},
Types = on.Types
});
}
public override On <TState> CreateParentReducer(On <TFeatureState> on)
{
return(new On <TState>
{
Reduce = (state, action) =>
{
if (on?.Reduce == null)
{
return state;
}
var featureState = _featureSelector(state);
var reducerResult = on.Reduce(featureState, action);
if (featureState.IsDeepEqual(reducerResult))
{
return state;
}
return _stateReducer(state, reducerResult);
},
Types = on.Types
});
}
public abstract On <TState> CreateParentReducer(On <TFeatureState> on);