geo.js

/*
Place this file in your /lib directory. 
Require geo in calling module like var geo = require("geo"); Then call geo.init() at the start of your app.
To get current location, place a fireEvent at the start of your app and anywhere else location needs updating like this:

Ti.App.addEventListener('resume', function() {
	Ti.App.fireEvent('getCurrentPosition');
});

@author Michael Stelly, et al.
@date 31 Dec 2013
*/

function init() {
	Ti.Geolocation.purpose = 'Koch Pipeline Public Awareness App';

	checkGeoPermission();

	if (OS_ANDROID) {
		Titanium.Geolocation.Android.LocationProvider = Ti.Geolocation.PROVIDER_GPS;
	}

	/*
	 * Set accuracy - The following values are supported
	 *
	 * Ti.Geolocation.ACCURACY_BEST
	 * Ti.Geolocation.ACCURACY_NEAREST_TEN_METERS
	 * Ti.Geolocation.ACCURACY_HUNDRED_METERS
	 * Ti.Geolocation.ACCURACY_KILOMETER
	 * Ti.Geolocation.ACCURACY_THREE_KILOMETERS
	 */

	Ti.Geolocation.accuracy = Ti.Geolocation.ACCURACY_BEST;

	/*
	 * Set distance filter. This dictates how often an event fires
	 * based on the distance the device moves (in meters).
	 */

	Ti.Geolocation.distanceFilter = 10;
	Ti.App.fireEvent('getCurrentPosition');

	return;
};

/* ===================
 Check permission settings
 =====================*/

function checkGeoPermission() {
	if (Ti.Geolocation.locationServicesEnabled === false) {
		helper.showDialog({
			title : 'Mapping Error',
			message : 'Your device has geo turned off - turn it on.'
		});
	} else {
		if (OS_IOS) {
			var authorization = Ti.Geolocation.getLocationServicesAuthorization();
		}

		if (authorization == Ti.Geolocation.AUTHORIZATION_DENIED) {
			helper.showDialog({
				title : 'Mapping Error',
				message : 'You have disallowed App from running geolocation services.'
			});
		} else if (authorization == Ti.Geolocation.AUTHORIZATION_RESTRICTED) {
			helper.showDialog({
				title : 'Mapping Error',
				message : 'Your system has disallowed App from running geolocation services.'
			});
		}
	}
	return;
};

/* ===================
 Get current position
 =====================*/

myGeolocation = {};
myGeolocation.lon = 0;
myGeolocation.lat = 0;

function updateGeolocation(e) {
	myGeolocation.lat = e.coords.latitude;
	myGeolocation.lon = e.coords.longitude;
	
	tracker.save({
		latitude: myGeolocation.lat,
		longitude: myGeolocation.lon
	});
	tracker.fetch();
	
}

Ti.App.addEventListener('getCurrentPosition', function() {
	Ti.Geolocation.getCurrentPosition(updateGeolocation);
});

//Public API
exports.init = init;