public static PathHelperResult SelectsOnly(this Path path, IViewModel singleViewModel)
{
Check.NotNull(path, nameof(path));
Check.NotNull(singleViewModel, nameof(singleViewModel));
bool success =
path.Length == 1 &&
path[0].ViewModel == singleViewModel;
return(success ?
PathHelperResult.Succeeded(vm: singleViewModel) :
PathHelperResult.Failed());
}
public static PathHelperResult SelectsOnlyCollectionOf(this Path path, IViewModel owner)
{
Check.NotNull(path, nameof(path));
Check.NotNull(owner, nameof(owner));
bool success =
path.Length == 2 &&
path[0].ViewModel == owner &&
path[1].Type == PathStepType.Collection;
return(success ?
PathHelperResult.Succeeded(vm: owner, collection: path[1].Collection) :
PathHelperResult.Failed());
}