evershade/Assets/Scripts/Managers/HotkeyManager.cs

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

public class HotkeyManager : MonoBehaviour
{
    // Singleton instance
    public static HotkeyManager Instance;
    private readonly Dictionary<string, KeyCode> actionKeys = new();

    // Dictionary to store key mappings and their actions
    private readonly Dictionary<KeyCode, Action> hotkeyActions = new();


    private void Awake()
    {
        // Implement singleton pattern
        if (Instance == null)
            Instance = this;
        else
            Destroy(gameObject);
    }

    private void Update()
    {
        // Check for key presses and invoke corresponding actions
        foreach (var hotkey in hotkeyActions)
            if (Input.GetKeyDown(hotkey.Key))
                hotkey.Value?.Invoke();
    }

    // Method to register a new hotkey
    public void RegisterHotkey(string actionName, KeyCode key, Action action)
    {
        Debug.Log("Registering Hot Key: " + actionName);
        if (actionKeys.ContainsKey(actionName)) UnregisterHotkey(actionKeys[actionName], action);

        actionKeys[actionName] = key;

        if (hotkeyActions.ContainsKey(key))
            hotkeyActions[key] += action;
        else
            hotkeyActions[key] = action;
    }

    // Method to unregister a hotkey
    public void UnregisterHotkey(KeyCode key, Action action)
    {
        if (hotkeyActions.ContainsKey(key))
        {
            hotkeyActions[key] -= action;
            if (hotkeyActions[key] == null) hotkeyActions.Remove(key);
        }
    }


    public KeyCode GetHotkey(string actionName)
    {
        return actionKeys.ContainsKey(actionName) ? actionKeys[actionName] : KeyCode.None;
    }

    public Dictionary<string, KeyCode> GetAllHotkeys()
    {
        return new Dictionary<string, KeyCode>(actionKeys);
    }

    public void UpdateHotkey(string actionName, KeyCode newKey)
    {
        if (actionKeys.ContainsKey(actionName))
        {
            var oldKey = actionKeys[actionName];
            if (hotkeyActions.ContainsKey(oldKey))
            {
                var action = hotkeyActions[oldKey];
                hotkeyActions.Remove(oldKey);
                RegisterHotkey(actionName, newKey, action);
            }
        }
    }

    // Method to clear all hotkeys
    public void ClearHotkeys()
    {
        hotkeyActions.Clear();
    }
}