SubscriptionTracker.cs

using System;
using System.Collections.Generic;
using UnityEngine;

public class SubscriptionTracker
{
    public string Name => _owner.name;
    private readonly MonoBehaviour _owner;
    private readonly Dictionary<(object source, Delegate handler), Action> _subscriptions = new();

    public SubscriptionTracker(MonoBehaviour owner)
    {
        _owner = owner;
    }

    public (object source, EventHandler handler) TrySubscribe(
        object source,
        Action<EventHandler> subscribeAction,
        Action<EventHandler> unsubscribeAction,
        EventHandler handler)
    {
        var key = (source, handler);
        if (_subscriptions.ContainsKey(key))
            return default;

        subscribeAction(handler);
        _subscriptions[key] = () => unsubscribeAction(handler);
        return key;
    }

    public (object source, EventHandler<TEventArgs> handler) TrySubscribe<TEventArgs>(
        object source,
        Action<EventHandler<TEventArgs>> subscribeAction,
        Action<EventHandler<TEventArgs>> unsubscribeAction,
        EventHandler<TEventArgs> handler) where TEventArgs : EventArgs
    {
        var key = (source, handler);
        if (_subscriptions.ContainsKey(key))
            return default;

        subscribeAction(handler);
        _subscriptions[key] = () => unsubscribeAction(handler);
        return key;
    }

    public bool Unsubscribe(object source, EventHandler handler)
    {
        var key = (source, handler);
        bool result = false;
        if (_subscriptions.ContainsKey(key))
        {
            result = true;
            _subscriptions[key]();
        }
        _subscriptions.Remove(key);
        return result;
    }

    public bool Unsubscribe<TEventArgs>(object source, EventHandler<TEventArgs> handler) where TEventArgs : EventArgs
    {
        var key = (source, handler);
        bool result = false;
        if (_subscriptions.ContainsKey(key))
        {
            result = true;
            _subscriptions[key]();
        }
        _subscriptions.Remove(key);
        return result;
    }

    public bool Unsubscribe<TEventArgs>((object source, EventHandler<TEventArgs> handler) key) where TEventArgs : EventArgs
    {
        bool result = false;
        if (_subscriptions.ContainsKey(key))
        {
            result = true;
            _subscriptions[key]();
        }
        _subscriptions.Remove(key);
        return result;
    }

    public void UnsubscribeAll()
    {
        foreach (var unsubscribe in _subscriptions.Values)
        {
            unsubscribe();
        }
        _subscriptions.Clear();
    }
}