public ModListGalleryVM(MainWindowVM mainWindowVM)
: base(mainWindowVM)
{
MWVM = mainWindowVM;
// load persistent filter settings
if (settings.IsPersistent)
{
GameType = !string.IsNullOrEmpty(settings.Game) ? settings.Game : ALL_GAME_TYPE;
ShowNSFW = settings.ShowNSFW;
OnlyInstalled = settings.OnlyInstalled;
Search = settings.Search;
}
else
{
GameType = ALL_GAME_TYPE;
}
// subscribe to save signal
MWVM.Settings.SaveSignal
.Subscribe(_ => UpdateFiltersSettings())
.DisposeWith(this.CompositeDisposable);
ClearFiltersCommand = ReactiveCommand.Create(
() =>
{
OnlyInstalled = false;
ShowNSFW = false;
Search = string.Empty;
GameType = ALL_GAME_TYPE;
});
this.WhenAny(x => x.OnlyInstalled)
.Subscribe(val =>
{
if (val)
{
GameType = ALL_GAME_TYPE;
}
})
.DisposeWith(CompositeDisposable);
var random = new Random();
var sourceList = Observable.Return(Unit.Default)
.ObserveOn(RxApp.TaskpoolScheduler)
.SelectTask(async _ =>
{
try
{
Error = null;
var list = await ModlistMetadata.LoadFromGithub();
Error = ErrorResponse.Success;
return(list
// Sort randomly initially, just to give each list a fair shake
.Shuffle(random)
.AsObservableChangeSet(x => x.DownloadMetadata?.Hash ?? Hash.Empty));
}
catch (Exception ex)
{
Utils.Error(ex);
Error = ErrorResponse.Fail(ex);
return(Observable.Empty <IChangeSet <ModlistMetadata, Hash> >());
}
})
// Unsubscribe and release when not active
.FlowSwitch(
this.WhenAny(x => x.IsActive),
valueWhenOff: Observable.Return(ChangeSet <ModlistMetadata, Hash> .Empty))
.Switch()
.RefCount();
_Loaded = sourceList.CollectionCount()
.Select(c => c > 0)
.ToProperty(this, nameof(Loaded));
// Convert to VM and bind to resulting list
sourceList
.ObserveOnGuiThread()
.Transform(m => new ModListMetadataVM(this, m))
.DisposeMany()
// Filter only installed
.Filter(this.WhenAny(x => x.OnlyInstalled)
.Select <bool, Func <ModListMetadataVM, bool> >(onlyInstalled => (vm) =>
{
if (!onlyInstalled)
{
return(true);
}
if (!GameRegistry.Games.TryGetValue(vm.Metadata.Game, out var gameMeta))
{
return(false);
}
return(gameMeta.IsInstalled);
}))
// Filter on search box
.Filter(this.WhenAny(x => x.Search)
.Debounce(TimeSpan.FromMilliseconds(150), RxApp.MainThreadScheduler)
.Select <string, Func <ModListMetadataVM, bool> >(search => (vm) =>
{
if (string.IsNullOrWhiteSpace(search))
{
return(true);
}
return(vm.Metadata.Title.ContainsCaseInsensitive(search));
}))
.Filter(this.WhenAny(x => x.ShowNSFW)
.Select <bool, Func <ModListMetadataVM, bool> >(showNSFW => vm =>
{
if (!vm.Metadata.NSFW)
{
return(true);
}
return(vm.Metadata.NSFW && showNSFW);
}))
// Filter by Game
.Filter(this.WhenAny(x => x.GameType)
.Debounce(TimeSpan.FromMilliseconds(150), RxApp.MainThreadScheduler)
.Select <string, Func <ModListMetadataVM, bool> >(GameType => (vm) =>
{
if (GameType == ALL_GAME_TYPE)
{
return(true);
}
if (string.IsNullOrEmpty(GameType))
{
return(false);
}
return(GameType == vm.Metadata.Game.GetDescription <Game>().ToString());
}))
.Filter(this.WhenAny(x => x.ShowNSFW)
.Select <bool, Func <ModListMetadataVM, bool> >(showNSFW => vm =>
{
if (!vm.Metadata.NSFW)
{
return(true);
}
return(vm.Metadata.NSFW && showNSFW);
}))
// Put broken lists at bottom
.Sort(Comparer <ModListMetadataVM> .Create((a, b) => a.IsBroken.CompareTo(b.IsBroken)))
.Bind(ModLists)
.Subscribe()
.DisposeWith(CompositeDisposable);
// Extra GC when navigating away, just to immediately clean up modlist metadata
this.WhenAny(x => x.IsActive)
.Where(x => !x)
.Skip(1)
.Delay(TimeSpan.FromMilliseconds(50), RxApp.MainThreadScheduler)
.Subscribe(_ =>
{
GC.Collect();
})
.DisposeWith(CompositeDisposable);
}
public ModListMetadataVM(ModListGalleryVM parent, ModlistMetadata metadata)
{
_parent = parent;
Metadata = metadata;
Location = Path.Combine(Consts.ModListDownloadFolder, Metadata.Links.MachineURL + ExtensionManager.Extension);
IsBroken = metadata.ValidationSummary.HasFailures;
OpenWebsiteCommand = ReactiveCommand.Create(() => Process.Start($"https://www.wabbajack.org/modlist/{Metadata.Links.MachineURL}"));
ExecuteCommand = ReactiveCommand.CreateFromObservable <Unit, Unit>(
canExecute: this.WhenAny(x => x.IsBroken).Select(x => !x),
execute: (unit) =>
Observable.Return(unit)
.WithLatestFrom(
this.WhenAny(x => x.Exists),
(_, e) => e)
// Do any download work on background thread
.ObserveOn(RxApp.TaskpoolScheduler)
.SelectTask(async(exists) =>
{
if (!exists)
{
try
{
var success = await Download();
if (!success)
{
Error = ErrorResponse.Fail("Download was marked unsuccessful");
return(false);
}
}
catch (Exception ex)
{
Error = ErrorResponse.Fail(ex);
return(false);
}
// Return an updated check on exists
return(File.Exists(Location));
}
return(exists);
})
.Where(exists => exists)
// Do any install page swap over on GUI thread
.ObserveOnGuiThread()
.Select(_ =>
{
_parent.MWVM.OpenInstaller(Path.GetFullPath(Location));
// Wait for modlist member to be filled, then open its readme
return(_parent.MWVM.Installer.Value.WhenAny(x => x.ModList)
.NotNull()
.Take(1)
.Do(modList =>
{
try
{
modList.OpenReadmeWindow();
}
catch (Exception ex)
{
Utils.Error(ex);
}
}));
})
.Switch()
.Unit());
_Exists = Observable.Interval(TimeSpan.FromSeconds(0.5))
.Unit()
.StartWith(Unit.Default)
.FlowSwitch(_parent.WhenAny(x => x.IsActive))
.Select(_ =>
{
try
{
return(!metadata.NeedsDownload(Location));
}
catch (Exception)
{
return(true);
}
})
.ToGuiProperty(this, nameof(Exists));
var imageObs = Observable.Return(Metadata.Links.ImageUri)
.DownloadBitmapImage((ex) => Utils.Log($"Error downloading modlist image {Metadata.Title}"));
_Image = imageObs
.ToGuiProperty(this, nameof(Image));
_LoadingImage = imageObs
.Select(x => false)
.StartWith(true)
.ToGuiProperty(this, nameof(LoadingImage));
}
