Geolocation Service

geolocation.js

import Ember from 'ember';

var geolocation;

if ('geolocation' in navigator) {
  geolocation = navigator.geolocation;
}

export default Ember.Service.extend({
  maximumAge: 30000,
  timeout: 27000,
  enableHighAccuracy: true,

  start: function () {
    if (!geolocation) {
      throw new Error("Geolocation is not available for this device.");
    }

    // We're already watching the position
    if (this.watchID) {
      return;
    }

    this.watchID = geolocation.watchPosition(position => {
      var currentPosition = this.get('currentPosition');

    if (!currentPosition || position.timestamp > currentPosition.timestamp) {
      this.set('currentPosition', position);
    }
  });
},

getPosition: function () {
  this.start();
  var options = buildOptions(this);

  return new Ember.RSVP.Promise(function (resolve, reject) {
    geolocation.getCurrentPosition(resolve, reject, options);
  });
}
});

function buildOptions(service) {
  return service.getProperties('maximumAge', 'timeout', 'enableHighAccuracy');
}