bluflame/intromat/Intromat/ViewModels/DocumentViewModel.cs

using System.Reactive.Linq;
using Intromat.Views;
using NodeNetwork.Toolkit.BreadcrumbBar;
using ReactiveUI;
using Splat;

namespace Intromat.ViewModels
{
    public sealed class DocumentViewModel : FileViewModel
    {
        private readonly ObservableAsPropertyHelper<ReactiveObject> _currentViewModel;
        private readonly CodeGenNetworkViewModel _mainNetwork;

        static DocumentViewModel()
        {
            Locator.CurrentMutable.Register(() => new DocumentView(), typeof(IViewFor<DocumentViewModel>));
        }

        public static DocumentViewModel CreateDefault(MainViewModel mainVm, ModuleViewModel module, FolderViewModel parent, string name)
        {
            var documentVm = new DocumentViewModel(mainVm, module, parent, name);
            return documentVm;
        }

        public DocumentViewModel(MainViewModel mainVm, ModuleViewModel module, FolderViewModel parent, string name)
            : base(module, parent, name, "igraph")
        {
            var network = new CodeGenNetworkViewModel(this, name);
            _mainNetwork = network;
            MainViewModel = mainVm;

            this.WhenAnyValue(vm => vm.NetworkBreadcrumbBar.ActiveItem)
                .Cast<NetworkBreadcrumbViewModel?>()
                .Where(b => b != null)
                .Select(b => (CodeGenNetworkViewModel)b!.ViewModel!)
                .ToProperty(this, vm => vm.CurrentViewModel, out _currentViewModel);

            NetworkBreadcrumbBar.ActivePath.Edit(list =>
            {
                list.Clear();
                list.Add(new NetworkBreadcrumbViewModel
                {
                    Name = "Main",
                    ViewModel = _mainNetwork
                });
            });
        }

        public override ReactiveObject CurrentViewModel => _currentViewModel.Value;

        public CodeGenNetworkViewModel MainNetwork => _mainNetwork;

        public BreadcrumbBarViewModel NetworkBreadcrumbBar { get; } = new();

        public override string Name
        {
            get => base.Name;
            set
            {
                base.Name = value;
                _mainNetwork.Name = value;
                // TODO: adjust path!
            }
        }

        public MainViewModel MainViewModel { get; }
    }
}