added all files to project

modules/MMM-PublicTransportHafas/node_modules/gps-distance/lib/distance.js

@@ -0,0 +1,38 @@
+var RADIUS = 6371;
+
+var toRad = function(n) {
+  return n * Math.PI / 180;
+};
+
+var getDistance = function(from, to) {
+  var fromLat = from[0];
+  var fromLon = from[1];
+  var toLat = to[0];
+  var toLon = to[1];
+
+  var dLat = toRad(toLat - fromLat);
+  var dLon = toRad(toLon - fromLon);
+  var fromLat = toRad(fromLat);
+  var toLat = toRad(toLat);
+
+  var a = Math.pow(Math.sin(dLat / 2), 2) +
+          (Math.pow(Math.sin(dLon / 2), 2) * Math.cos(fromLat) * Math.cos(toLat));
+  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+
+  return RADIUS * c;
+};
+
+var measurePath = function(points) {
+  return points.reduce(function(memo, point) {
+    var distance = memo.lastPoint === null ? 0 : getDistance(memo.lastPoint, point);
+    return { lastPoint: point, distance: distance + memo.distance };
+  }, { lastPoint: null, distance: 0 }).distance;
+};
+
+module.exports = function(fromLat, fromLon, toLat, toLon) {
+  if(typeof fromLat === 'number'){
+    return getDistance([fromLat, fromLon], [toLat, toLon]);
+  } else {
+    return measurePath(fromLat);
+  }
+};