/// <summary>
/// 全ReactivePropertyの検証エラーを返すヘルパ
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public static IObservable <IEnumerable <ValidationResult> > GetAllErrorsObservable(this ForValidation context)
{
var targets = context.GetTargetPropValues().Where(a =>
{
var type = a.Value.GetType();
if (!type.IsGenericType)
{
return(false);
}
var rpType = type.GetGenericTypeDefinition();
if (rpType != typeof(ReactiveProperty <>))
{
return(false);
}
return(true);
})
.Select(a =>
{
var type = a.Value.GetType();
var prop = type.GetProperty("ObserveErrorChanged");
var observable = prop.GetValue(a.Value) as IObservable <System.Collections.IEnumerable>;
if (observable == null)
{
return(null);
}
return(observable.Select(e => e?.OfType <ValidationResult>()));
})
.Where(a => a != null);
return(Observable.CombineLatest(targets)
.Select(a => a.Where(e => e != null).SelectMany(e => e)));
}
/// <summary>
/// 全ReactivePropertyにValidationAttributeによる検証ロジックを設定する
/// </summary>
/// <param name="context"></param>
public static ForValidation SetupReactiveProperties(this ForValidation context)
{
var propValues = context.GetTargetPropValues();
foreach (var prop in propValues)
{
var type = prop.Value.GetType();
if (!type.IsGenericType)
{
continue;
}
var rpType = type.GetGenericTypeDefinition();
if (rpType != typeof(ReactiveProperty <>))
{
continue;
}
// MethodInfoの場合はこう？
// https://ja.stackoverflow.com/questions/12801/c-type%E5%9E%8B%E3%81%A7%E6%8C%87%E5%AE%9A%E3%81%97%E3%81%9F%E5%9E%8B%E3%81%AB%E5%8B%95%E7%9A%84%E3%82%AD%E3%83%A3%E3%82%B9%E3%83%88%E3%81%99%E3%82%8B%E3%81%AB%E3%81%AF
var typeParameter = type.GetGenericArguments()[0];
var methodInfo = SetValidationMethodInfos.First(a =>
a.GetParameters()[1].ParameterType == typeof(PropertyInfo));
var genericMethod = methodInfo.MakeGenericMethod(new[] { typeParameter });
genericMethod.Invoke(null, new[] { prop.Value, context.GetTargetPropInfo(prop.Key) });
}
return(context);
}