Chat commands 💬

So, I know there are already chat commands, but I feel like there should be a type of logic activation called a chat command cube. so bacicly what it does is it will acivate a certain piece of logic if somone says the correct command in the chat. Like, for example, a door that can only be opened by the command: /opendoor. The command will be typed in the cube. If anyone says the command writen in the cube in the chat, whatever logic hooked up to the chat command cube will activate.