public TailViewStateController([NotNull] TailViewModel tailView, IStateBucketService stateBucketService, ISchedulerProvider schedulerProvider, ITailViewStateRestorer tailViewStateRestorer, ILogger logger, bool loadDefaults)
{
if (tailView == null) throw new ArgumentNullException(nameof(tailView));
_tailView = tailView;
var converter = new TailViewToStateConverter();
bool loadingSettings=false;
const string type = "TailView";
logger.Info("Loading state for {0}", tailView.Name);
//Load state
if (loadDefaults)
{
stateBucketService
.Lookup(type, tailView.Name)
.IfHasValue(tailviewstate =>
{
schedulerProvider.Background.Schedule(() =>
{
try
{
loadingSettings = true;
tailViewStateRestorer.Restore(tailView, tailviewstate);
}
finally
{
loadingSettings = false;
}
});
});
}
//write latest to file when something triggers a change
var selectedChanged = tailView.SearchCollection
.WhenValueChanged(sc=>sc.Selected,false)
.Where(vm => vm !=null)
.Select(vm=>vm.Text);
var metaChanged = _tailView.SearchMetadataCollection.Metadata.Connect()
.ToCollection()
.Select(metaData => metaData.ToArray());
var writer = selectedChanged.CombineLatest(metaChanged,(selected, metadata)=>new { selected , metadata })
.Where(_=> !loadingSettings)
.Throttle(TimeSpan.FromMilliseconds(250))
.Select(x => converter.Convert(_tailView.Name, x.selected, x.metadata))
.Subscribe(state =>
{
stateBucketService.Write(type, tailView.Name, state);
});
_cleanUp = new CompositeDisposable(writer);
}
public HeaderedView Create(ViewState state)
{
var converter = new TailViewToStateConverter();
var converted = converter.Convert(state.State);
var file = converted.FileName;
var viewModel = CreateView(new FileInfo(file));
var restorer = (IPersistentView)viewModel;
restorer.Restore(state);
return new HeaderedView(new FileHeader(new FileInfo(file)), viewModel);
}
ViewState IPersistentView.CaptureState()
{
var coverter = new TailViewToStateConverter();
var state = coverter.Convert(_tailView.Name, _tailView.SearchCollection.Selected.Text, _tailView.SearchMetadataCollection.Metadata.Items.ToArray());
return new ViewState(TailViewModelConstants.ViewKey, state);
}
public void Restore(TailViewModel view, State state)
{
var converter = new TailViewToStateConverter();
Restore(view,converter.Convert(state));
}
