NTU Campus bus parser

parser.js

function versionString() {
    return "1.0";
}

function parseURL() {
    return "http://campusbus.ntu.edu.sg/ntubus";
}

function headers() {
    return {
        "User_Agent" : "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_4) AppleWebKit/536.30.1 (KHTML, like Gecko) Version/6.0.5 Safari/536.30.1",
        "Accept" : "text/html",
        "Accept-Encoding" : "gzip",
        "Accept-Language" : "en-us"
    };
}

function stripHTML(html) {
    var div = document.createElement("div");
    div.innerHTML = html;

    return div.textContent || div.innerText || "";
}

function dictifyBusStop(busstop) {
	if (null == busstop || 'object' != typeof busstop) throw TypeError;
	var copy = {};
	for (var attr in busstop) {
		if (attr == 'marker') continue;
		if (attr == 'markerShadow') continue;
		copy[attr] = busstop[attr];
	}
	return copy;
}

function dictifyBusRoute(route) {
	if (null == route || 'object' != typeof route) throw TypeError;
//	var copy = {};
//	for (var attr in route) {
//		copy[attr] = route[attr];
//	}
//	return copy;

    return route;
}

function dictifyBusDevice(busdevice) {
	if (null == busdevice || 'object' != typeof busdevice) throw TypeError;
	var copy = {};
	for (var attr in busdevice) {
		if (attr == 'marker') continue;
		if (attr == 'plotter') continue;
        if (attr == 'info1') {
            copy[attr] = stripHTML(busdevice[attr]);
            continue;
        }
        if (attr == 'info2') {
            copy[attr] = stripHTML(busdevice[attr]);
            continue;
        }
		copy[attr] = busdevice[attr];
	}
	return copy;
}

function parseBusRoutes() {
    var routes = [];
    for (var i=0;i<ntu.routes.length;i++) {
        try {
            routes.push(dictifyBusRoute(ntu.routes[i]));
        } catch (e) {
        }
    }

    return routes;
}

function parseBusStops() {
	var busStops = [];
	for (var i=0;i<ntu.busStop.length;i++) {
		try {
            busStops.push(dictifyBusStop(ntu.busStop[i]));
		} catch (e) {
		}
	}

    return busStops;
}

function parseBusDevices() {
    var busDevices = [];
    for (var i=0;i<ntu.busDevice.length;i++) {
        try {
            busDevices.push(dictifyBusDevice(ntu.busDevice[i]));
        } catch (e) {
        }
    }
    return busDevices;
}

function parse() {
	return "{\"busStops\" : " + JSON.stringify(parseBusStops()) + ", \"busDevices\" : " + JSON.stringify(parseBusDevices()) + ", \"routes\" : " + JSON.stringify(parseBusRoutes()) + "}";
};