ControlsManager.cs

#region
using System;
using System.Collections.Generic;
using UnityEngine;

#endregion

public enum ControlType : byte
{
    ButtonDown,
    ButtonPressed,
    ButtonUp,
    Axis
}

[Serializable]
public class Control
{
    public string code;
    public ControlType type;

    public Control(ControlType type, string code)
    {
        this.type = type;
        this.code = code;
    }
}

[Serializable]
public class ControlHandler
{
    public List<Control> controls = new List<Control>();
    public event Action<float> stateChanged;

    public void Invoke(float value)
    {
        if (this.stateChanged != null)
            this.stateChanged.Invoke(value);
    }

    public void SetType(ControlType type)
    {
        for (var i = 0; i < this.controls.Count; i++)
            if (this.controls[i].type != ControlType.Axis)
                this.controls[i].type = type;
    }

    public void BindRevert(ControlHandler handler)
    {
        for (var i = 0; i < handler.controls.Count; i++)
            switch (handler.controls[i].type)
            {
                case ControlType.ButtonDown:
                case ControlType.ButtonPressed:
                    this.controls.Add(new Control(ControlType.ButtonUp, handler.controls[i].code));
                    break;
                case ControlType.ButtonUp:
                    this.controls.Add(new Control(ControlType.ButtonDown, handler.controls[i].code));
                    break;
                default:
                    this.controls.Add(new Control(handler.controls[i].type, handler.controls[i].code));
                    break;
            }
    }
}

public class ControlsManager : MonoBehaviour
{
    [HideInInspector]
    public List<ControlHandler> controlHandlers;

    public ControlHandler jump;
    public ControlHandler look;

    public float mouseSensitivity = 10.0f;
    public ControlHandler moveBackward;
    public ControlHandler moveForward;
    public ControlHandler moveLeft;
    public ControlHandler moveRight;
    public ControlHandler pickItem;
    public ControlHandler sit;
    public ControlHandler speedUp;
    internal ControlHandler stand = new ControlHandler();
    public ControlHandler switchItem;
    public ControlHandler switchItemMode;
    public ControlHandler switchUsageMode;
    public ControlHandler throwItem;
    public ControlHandler turn;
    public ControlHandler useItem;
    public ControlHandler useItemAlternatively;

    private void Start()
    {
        this.moveForward.SetType(ControlType.ButtonPressed);
        this.moveBackward.SetType(ControlType.ButtonPressed);
        this.moveRight.SetType(ControlType.ButtonPressed);
        this.moveLeft.SetType(ControlType.ButtonPressed);
        this.speedUp.SetType(ControlType.ButtonPressed);
        this.turn.SetType(ControlType.Axis);
        this.look.SetType(ControlType.Axis);
        this.jump.SetType(ControlType.ButtonPressed);
        this.sit.SetType(ControlType.ButtonDown);
        this.stand.BindRevert(this.sit);
        this.pickItem.SetType(ControlType.ButtonDown);
        this.throwItem.SetType(ControlType.ButtonDown);
        this.useItem.SetType(ControlType.ButtonPressed);
        this.useItemAlternatively.SetType(ControlType.ButtonPressed);
        this.switchItem.SetType(ControlType.Axis);
        this.switchUsageMode.SetType(ControlType.ButtonDown);
        this.switchItemMode.SetType(ControlType.ButtonDown);

        this.controlHandlers.Add(this.moveForward);
        this.controlHandlers.Add(this.moveBackward);
        this.controlHandlers.Add(this.moveRight);
        this.controlHandlers.Add(this.moveLeft);
        this.controlHandlers.Add(this.speedUp);
        this.controlHandlers.Add(this.turn);
        this.controlHandlers.Add(this.look);
        this.controlHandlers.Add(this.jump);
        this.controlHandlers.Add(this.sit);
        this.controlHandlers.Add(this.stand);
        this.controlHandlers.Add(this.pickItem);
        this.controlHandlers.Add(this.throwItem);
        this.controlHandlers.Add(this.useItem);
        this.controlHandlers.Add(this.useItemAlternatively);
        this.controlHandlers.Add(this.switchItem);
        this.controlHandlers.Add(this.switchUsageMode);
        this.controlHandlers.Add(this.switchItemMode);
    }

    private void Update()
    {
        bool controlIsUsed;
        foreach (var controlHandler in this.controlHandlers)
            foreach (var control in controlHandler.controls)
            {
                controlIsUsed = false;
                switch (control.type)
                {
                    case ControlType.ButtonDown:
                        if (Input.GetKeyDown(control.code))
                        {
                            controlHandler.Invoke(1.0f);
                            controlIsUsed = true;
                        }
                        break;
                    case ControlType.ButtonPressed:
                        if (Input.GetKey(control.code))
                        {
                            controlHandler.Invoke(1.0f);
                            controlIsUsed = true;
                        }
                        break;
                    case ControlType.ButtonUp:
                        if (Input.GetKeyUp(control.code))
                        {
                            controlHandler.Invoke(0.0f);
                            controlIsUsed = true;
                        }
                        break;
                    case ControlType.Axis:
                        controlHandler.Invoke(Input.GetAxis(control.code));
                        controlIsUsed = true;
                        break;
                }
                if (controlIsUsed)
                    break;
            }
    }
}