public RenameFileViewModel(RenameFileState state, ICloudViewModel owner, ICloud provider)
{
_oldName = owner
.WhenAnyValue(x => x.SelectedFile.Name)
.ToProperty(this, x => x.OldName);
this.ValidationRule(
x => x.NewName,
name => !string.IsNullOrWhiteSpace(name),
"New name shouldn't be empty.");
var oldRule = this.ValidationRule(
x => x.OldName,
name => !string.IsNullOrWhiteSpace(name),
"Old name shouldn't be empty.");
Rename = ReactiveCommand.CreateFromTask(
() => provider.RenameFile(owner.SelectedFile.Path, NewName),
this.IsValid());
_isLoading = Rename
.IsExecuting
.ToProperty(this, x => x.IsLoading);
var canInteract = owner
.WhenAnyValue(x => x.CanInteract)
.Skip(1)
.StartWith(true);
var canOpen = this
.WhenAnyValue(x => x.IsVisible)
.Select(visible => !visible)
.CombineLatest(
canInteract,
oldRule.WhenAnyValue(x => x.IsValid),
(visible, interact, old) => visible && old && interact);
var canClose = this
.WhenAnyValue(x => x.IsVisible)
.Select(visible => visible);
Open = ReactiveCommand.Create(() => { }, canOpen);
Close = ReactiveCommand.Create(() => { }, canClose);
Open.Select(unit => true)
.Merge(Close.Select(unit => false))
.Subscribe(visible => IsVisible = visible);
Close.Subscribe(x => NewName = string.Empty);
Rename.InvokeCommand(Close);
_hasErrorMessage = Rename
.ThrownExceptions
.Select(exception => true)
.Merge(Close.Select(x => false))
.ToProperty(this, x => x.HasErrorMessage);
_errorMessage = Rename
.ThrownExceptions
.Select(exception => exception.Message)
.Log(this, $"Rename file error occured in {provider.Name} for {OldName}")
.Merge(Close.Select(x => string.Empty))
.ToProperty(this, x => x.ErrorMessage);
NewName = state.NewName;
this.WhenAnyValue(x => x.NewName)
.Subscribe(name => state.NewName = name);
}