Unity EventManager using UnityEvents and a HashTable to pass data of any type as a parameter in the event.

Unity EventManager Using UnityEvents With Parameters

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

/*
Unity C# Event manager using UnityEvents and a Hashtable for loosely typed params with event.
This EventManager expands the usefulness of UnityEvents by allowing values of any type to be passed as a
parameter in the Event eg: int, string, Vector3 etc.

Usage:

// Add Listener for Event
SDKBoyEventManager.StartListening ("MY_EVENT", MyEventHandlerMethodName);

// Trigger Event:
SDKBoyEventManager.TriggerEvent ("MY_EVENT", new Hashtable(){{"MY_EVENT_KEY", "valueOfAnyType"}});

// Pass null instead of a Hashtable if no params
SDKBoyEventManager.TriggerEvent ("MY_EVENT", null);

// Handler
private void HandleTeleportEvent (Hashtable eventParams){
	if (eventParams.ContainsKey("MY_EVENT")){
		// DO SOMETHING
	}
}

*/

public class SDKBoyEvent : UnityEvent <Hashtable> {}

public class SDKBoyEventManager : MonoBehaviour {

	private Dictionary <string, SDKBoyEvent> eventDictionary;

	private static SDKBoyEventManager eventManager;

	//	SINGLETON
	public static SDKBoyEventManager instance
	{
		get
		{
			if (!eventManager)
			{
				eventManager = FindObjectOfType (typeof (SDKBoyEventManager)) as SDKBoyEventManager;

				if (!eventManager)
				{
					Debug.LogError ("There needs to be one active EventManger script on a GameObject in your scene.");
				}
				else
				{
					eventManager.Init (); 
				}
			}

			return eventManager;
		}
	}

	void Init ()
	{
		if (eventDictionary == null)
		{
			eventDictionary = new Dictionary<string, SDKBoyEvent>();
		}
	}

	public static void StartListening (string eventName, UnityAction<Hashtable> listener)
	{
		SDKBoyEvent thisEvent = null;
		if (instance.eventDictionary.TryGetValue (eventName, out thisEvent))
		{
			thisEvent.AddListener (listener);
		} 
		else
		{
			thisEvent = new SDKBoyEvent ();
			thisEvent.AddListener (listener);
			instance.eventDictionary.Add (eventName, thisEvent);
		}
	}

	public static void StopListening (string eventName, UnityAction<Hashtable> listener)
	{
		if (eventManager == null) return;
		SDKBoyEvent thisEvent = null;
		if (instance.eventDictionary.TryGetValue (eventName, out thisEvent))
		{
			thisEvent.RemoveListener (listener);
		}
	}

	public static void TriggerEvent (string eventName, Hashtable eventParams = default(Hashtable))
	{
		SDKBoyEvent thisEvent = null;
		if (instance.eventDictionary.TryGetValue (eventName, out thisEvent))
		{
			thisEvent.Invoke (eventParams);
		}
	}

	public static void TriggerEvent (string eventName)
	{
		TriggerEvent (eventName, null);
	}
}