LaboratoryProtection/Assets/UnityTest/UI/Scripts/PageController.cs

using Cysharp.Threading.Tasks;
using Cysharp.Threading.Tasks.Triggers;

using MessagePipe;

using PMaker.DependencyInjection;
using PMaker.MessagePipe;
using PMaker.UI;

using Sirenix.OdinInspector;

using System.Collections.Generic;

using UniRx;

using UnityEngine;

public class PageController : SingletonMonobehaviour
{
    [SerializeField]
    private Page[] _pages;

    [SerializeField]
    private Transform _uiRoot;

    [SerializeField]
    [ReadOnly]
    private Dictionary<int, GameObject> _pool;

    private void Reset()
    {
        _pages = GameObject.FindObjectsOfType<Page>();
        _uiRoot = GameObject.Find("Pages").transform;
    }

    protected override void Awake()
    {
        base.Awake();
        foreach (var item in _pages)
        {
            item.gameObject.SetActive(false);
        }
        _pool = new Dictionary<int, GameObject>();
        MessageKit.GetAsyncSubscriber<string, int>()
                  .Subscribe("Reload", async (_, token) => {
                      var prefab = _pages[_];
                      var page = Instantiate(prefab.gameObject, _uiRoot);
                      page.SetActive(true);
                      if (_pool.TryGetValue(_, out var last) == true)
                      {
                          DestroyImmediate(last);
                          _pool.Remove(_);
                      }
                      _pool.Add(_, page);
                      await page.StartAsync();
                      Debug.Log(GetPage(0));
                  })
                  .AddTo(this);
    }

    public Page GetPage(int index)
    {
        return _pool[index].GetComponent<Page>();
    }
}