JavaScript example for using CommandFusion iViewer to process data returned from a HTTP Request to a Z-Wave MiCasaVerde Vera Lite system

main.js

var myJSON, baseURL = "http://192.168.1.90:3480/data_request?id=lu_status2&DataVersion=1&DeviceNum=";

function requestData(deviceNum) {
	CF.request(baseURL + deviceNum, function(status, headers, body) {
		if (status == 200) {
			
			// OK response received, now grab the JSON string from body and turn it into an object
			myJSON = JSON.parse(body);
			
			// Now assign one of the known state variables to a serial join (if it will always be at a certain index in the state array)
			CF.setJoin("s100", myJSON["Device_Num_"+deviceNum].states[1].value);

			// Or lookup a variable by name from a specific device name if multiple devices are returned
			CF.setJoin("s101", getDeviceVariable("Device_Num_"+deviceNum,"LoadLevelStatus"));

			// Or lookup a variable by name on its own if you don't care what device it is coming from
			CF.setJoin("s102", getVariable("LoadLevelStatus"));

		}
	});
}


// Get the value of a variable from a specific device
function getDeviceVariable(deviceName, variableName) {
	// First check that the device name exists
	if (!myJSON.hasOwnProperty(deviceName)) {
		CF.log("Device name could not be found: " + deviceName);
		return;
	}
	// Get the number of state variables in the device
	var i = 0, n = myJSON[deviceName].states.length;
	// Loop through all the state variables
	for (; i < n; i++) {
		// Find the variable name that matches the one requested
		if (myJSON[deviceName].states[i].variable == variableName) {
			// Send the value of the variable back to the caller
			return myJSON[deviceName].states[i].variable;
		}
	}
	// If we get to here, the variable was not found in any of the devices.
	// Do some error logging and send back an empty string as the value
	CF.log("State variable not found: " + variableName);
	return "";
}


// Get the value of a variable from the first device that contains it
function getVariable(variableName) {
	// Loop through all device objects in the returned data (eg. Device_Num_3)
	for (var device in myJSON) {
		// Get the number of state variables in the device
		var i = 0, n = myJSON[device].states.length;
		// Loop through all the state variables
		for (; i < n; i++) {
			// Find the variable name that matches the one requested
			if (myJSON[device].states[i].variable == variableName) {
				// Send the value of the variable back to the caller
				return myJSON[device].states[i].variable;
			}
		}
	}
	// If we get to here, the variable was not found in any of the devices.
	// Do some error logging and send back null value
	CF.log("State variable not found: " + variableName);
	return;
}