runcommand.js

/*
	node-hue-api run command example
	This example contacts a hue hub and runs a command you give it
	from the command line, if it's a valid command.
	This won't work with all the commands in the API, but it will handle
	all the commands that require no parameters, e.g.  
	config(), lights(), newLights(), registeredUsers(), 
	scenes(), groups(), schedules().
	The example uses the promises interface to node-hue-api.
	
	created 6 Feb 2015
	modified 16 Feb 2015
	by Tom Igoe
	
	Based on the examples in the node-hue-api readme:
	https://github.com/peter-murray/node-hue-api
	
	to call this from the commandline:
	node runcommand.js address username command 
	
	(username must be a previously registered user, and command
	must be a valid command in the node-hue-api API.)
*/


var hue = require("node-hue-api"),	// include the node-hue-api library
	HueApi = hue.HueApi,					// make a local instance of HueApi
	hub; 										// will hold the hub info when you instantiate it
	
var username = process.argv[3],		// your app's username from the command line
	address = process.argv[2],			// hub IP address from command line
	command = process.argv[4];			// the command you want to run from the API
	
// print a JSON object nicely:
var displayResult = function(result) {
    console.log(JSON.stringify(result, null, 2));
};

// check whether a command is part of the API, and run it:
function display(cmd) {
	if (hub[cmd] instanceof Function) {	// if the param string cmd is a function in the API
		hub[cmd]()								// then run it
		.then(displayResult)					// and display the result
		.done();
	}
}

//----------------------------------
// This is where execution of the script starts

if (!username) {									// if no command line username,
	username = 'atleasttenletters';			// make one up
}

if (address) {										// if there's a command line address,
	hub = new HueApi(address, username);	// instantiate the hub
	display(command);								// run the command from this hub
} else {												// if not, quit.
	console.log("You need to enter the hub address.\n\n"); 
	process.exit(0);
}