geolocation: Astract the Simulator controller

lib/geolocation/index.js

@@ -17,20 +17,40 @@
 
 'use strict';
 
+var Sensor = require('./simulator');
 
 /**
  * Class inspired by W3C's generic-sensor
  * @related: https://www.w3.org/TR/ambient-light/
  **/
 function Geolocation(options) {
-  throw('TODO: unimplemented');
+  this.type = 'geolocation';
+  this.latitude = 0;
+  this.longitude = 0;
+  this.onerror = function (err) {
+    throw new Error(err)
+  }
+  this.options = options || {};
+  this.options.frequency = this.options.frequency || 1;
+  return this;
 }
 
 Geolocation.prototype.update = function update() {
   var self = this;
   try {
     self.hasReading = false;
-    throw('TODO: unimplemented');
+    self.sensor.read(function(err, data) {
+      if (err || data === null || typeof data === 'undefined') {
+        return self.onerror(data)
+      }
+      self.timestamp = new Date();
+      self.latitude = data.latitude;
+      self.longitude = data.longitude;
+      self.hasReading = true;
+      if (self.onreading) {
+        self.onreading();
+      }
+    });
   } catch (err) {
     self.onerror(err);
   }
@@ -47,7 +67,7 @@ Geolocation.prototype.start = function start() {
   this.state = 'activating';
   if (!this.sensor) {
     try {
-      throw('TODO: unimplemented');
+      this.sensor = new Sensor();
     } catch (err) {
       if (this.onerror) {
         return this.onerror(err)
@@ -59,7 +79,9 @@ Geolocation.prototype.start = function start() {
     if (!self.interval) {
       self.interval = setInterval(function() { self.update(); },
                                   1000. / self.options.frequency);
-      self.onactivate();
+      if (self.onactivate) {
+        self.onactivate();
+      }
       self.state = 'activated';
     }
   } catch(err) {
@@ -73,7 +95,7 @@ module.exports = Geolocation;
 if (module.parent === null) {
   var sensor = new Geolocation();
   sensor.onreading = function() {
-    console.log('log: ' + this.hasReading)
+    console.log('log: lat=' + this.latitude + ', long=' + this.longitude + ' - ' + this.timestamp);
     this.stop();
   }
   sensor.start();