Dynamic object context(?)

dynamicContext.js

// This is a snipper to test the idea of context-sensitive commands....
// 
//  The command is `n` which is a short for 'go north'
//  from a REPL standpoint, just taking the input 'n' and passing it to vm.runInContext() works
//  
//  However, that also limits to just that sandbox for commands, but I'd want at least 2...
//  that is 'mine' or the current one of the object, and the other for the room that the object 
//  is in...
//  But then I guess also extension provided by attachments (aim camera (at) target) if you're 
//  	holding a camera... 


const vm = require('vm');


var context1 = {
	get n() {
		console.log( "Leaving north..." );
	}
	, run(o) {
		o.doCommand.call(this);
	}
	, next : null
}

var context2 = {
	get n() {
		console.log( "No Exit in that direction..." );
	}
	, run(o) {
		o.doCommand.call(this);
	}
	, next : null
}


var myObject = {
	doCommand() {
		this.n;
	}
}

var myObject2 = {
	doCommand() {
		// this 'n' is always undefined.... although 'this.n' does work
		n;
	}
}

var x = {get n() { console.log('North.');}};

// if in node context 'this' has to be 'global'
Object.getOwnPropertyNames( x ).forEach( (prop) => Object.defineProperty(this, prop,  Object.getOwnPropertyDescriptor(x, prop)) ); 
n;


context1 = vm.createContext( context1 );
context2 = vm.createContext( context2 );

// this doesn't work form myObject2...
context1.run(myObject )
context2.run(myObject )

// this doesn't use 'my object' but runs the 'n' getter directly...
vm.runInContext( "n", context1 );
vm.runInContext( "n", context2 );



// these don't work....
if(0) {
	context1.next = myObject2.doCommand;
	vm.runInContext( "next.call(this)", context1 );

	context2.next = myObject2.doCommand;
	vm.runInContext( "next.call(this)", context2 );
}