Sixdegreeoffreedomdynamicloadsimulationdevice/Client/IViewModel/ViewModels/MenuViewModel.cs

using Avalonia.Collections;
using CommunityToolkit.Mvvm.Input;
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace IViewModel.ViewModels
{

    public sealed class MenuViewModel:ViewModelBase
    {
        public IReadOnlyList<string> MainMenus { get; } = [nameof(LanguageValueViewModel.MenuFile),nameof(LanguageValueViewModel.MenuDevice),nameof(LanguageValueViewModel.MenuAbout)];
        public ICommand Command => new RelayCommand<MenuItemViewModel?>((p) => MenuClick?.Invoke(this,p));
        public event EventHandler<MenuItemViewModel?> MenuClick;

        private bool isMenuVisible = true;
        public bool IsMenuVisible { get => isMenuVisible; set => SetProperty(ref isMenuVisible, value); }
        public MenuItemViewModel? this[string key]
        {
            get
            {
                MenuItemViewModel? menu = null;
                foreach (var item in Menus)
                {
                    menu = GetMenuItem(item, key);
                    if(menu!=null)return menu;
                }
                return menu;
            }
        }
        private MenuItemViewModel? GetMenuItem(MenuItemViewModel menuItem,string key)
        {
            if (menuItem == null ) return null;
            if(menuItem.Header == key)return menuItem;
            if( menuItem.Items == null || menuItem.Items.Count == 0)return null;
            foreach (var item in menuItem.Items)
            {
                var tempmenu= GetMenuItem(item, key);
                if(tempmenu!=null)return tempmenu;
            }
            return null;
        }
        public AvaloniaList<MenuItemViewModel> Menus { get; } = new AvaloniaList<MenuItemViewModel>();
        private MenuViewModel()
        {
            Menus.AddRange(MainMenus.Select(x => new MenuItemViewModel()
            {
                Header = x,
            }));
        }

        static MenuViewModel()
        {

        }
        public static MenuViewModel Instance { get; } = new MenuViewModel();
    }
    public sealed class MenuOrderAttribute : Attribute
    {
        public MenuOrderAttribute(int order) => Order = order;
        public int Order { get; }
    }
}