Building a Device Handler for IKEA 5 button remote?

My intended purpose is to have this as a light switch in my closet. I have some LED that turn on when the door is opened and turn off after x amount of seconds. I wanted to option to turn them back on (Big Power Button) or just turn them off or on if I wanted. The dimmer would be to dim or brighten and the left and right would be to change the White Level that are predefined in the light’s device handler.