public MainPageViewModel(DocumentManager documentManager, IAppCenterLogger appCenterLogger, IEventAggregator eventAggregator)
{
this.DocumentManager = documentManager;
this.AppCenterLogger = appCenterLogger;
this.EventAggregator = eventAggregator;
Documents = DocumentManager.Documents
.ToReadOnlyReactiveCollectionForCurrentContext();
NewDocumentTitle = new ReactivePropertySlim<string>();
AddDocumentCommand = NewDocumentTitle
.Select(x => !string.IsNullOrEmpty(x))
.ToReactiveCommand()
.WithSubscribe(() =>
{
if (NewDocumentTitle.Value == "野菜")
{
throw new InvalidOperationException("野菜 is invalid");
}
DocumentManager.AddDocument(NewDocumentTitle.Value);
AppCenterLogger.TrackEvent("Document created", ("name", NewDocumentTitle.Value));
NewDocumentTitle.Value = "";
});
SelectedDocument = new ReactivePropertySlim<Document>();
IsEditorBladeOpen = SelectedDocument
.Select(x => x != null)
.ToReadOnlyReactivePropertySlim();
BladeMode = DocumentManager.DocumentEditMode
.Select(x => x == DocumentEditMode.Normal ? Microsoft.Toolkit.Uwp.UI.Controls.BladeMode.Normal : Microsoft.Toolkit.Uwp.UI.Controls.BladeMode.Fullscreen)
.ToReadOnlyReactivePropertySlim();
PreviewMarkdownText = SelectedDocument
.SelectMany(x => x?.Content ?? Observable.Return(""))
.Throttle(TimeSpan.FromSeconds(1))
.ObserveOnUIDispatcher()
.ToReadOnlyReactivePropertySlim();
IsPreviewOpen = IsPreviewOpenNotifier.ToReadOnlyReactivePropertySlim();
SwitchPreviewCommand = new ReactiveCommand()
.WithSubscribe(() => IsPreviewOpenNotifier.SwitchValue());
RemoveDocumentCommand = new ReactiveCommand<Document>()
.WithSubscribe(x =>
{
DocumentManager.RemoveDocument(x.Id.Value);
AppCenterLogger.TrackEvent("Document removed", ("name", x.Title.Value), ("content", x.Content.Value));
IsPreviewOpenNotifier.TurnOff();
EventAggregator.GetEvent<NotifyEvent>()
.Publish($"{x.Title.Value} を削除しました。");
});
}