COM3D2.MeidoPhotoStudio/src/MeidoPhotoStudio.Plugin/Managers/EffectManager.cs

using System;
using System.Collections.Generic;

namespace MeidoPhotoStudio.Plugin
{
    public class EffectManager : IManager
    {
        public const string header = "EFFECT";
        public const string footer = "END_EFFECT";

        private readonly Dictionary<Type, IEffectManager> EffectManagers = new();

        public T Get<T>() where T : IEffectManager =>
            EffectManagers.ContainsKey(typeof(T)) ? (T)EffectManagers[typeof(T)] : default;

        public T AddManager<T>() where T : IEffectManager, new()
        {
            var manager = new T();

            EffectManagers[typeof(T)] = manager;
            manager.Activate();

            return manager;
        }

        public void Activate()
        {
            foreach (var effectManager in EffectManagers.Values)
                effectManager.Activate();
        }

        public void Deactivate()
        {
            foreach (var effectManager in EffectManagers.Values)
                effectManager.Deactivate();
        }

        public void Update() { }
    }
}