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// to get the current latitude and longitude from browser
// credits https://github.com/arunisrael/angularjs-geolocation
'use strict';
angular.module('geolocation',[]).constant('geolocation_msgs', {
'errors.location.unsupportedBrowser':'Browser does not support location services',
'errors.location.notFound':'Unable to determine your location',
});
angular.module('geolocation')
.factory('geolocation', ['$q','$rootScope','$window','geolocation_msgs',function ($q,$rootScope,$window,geolocation_msgs) {
return {
getLocation: function () {
var deferred = $q.defer();
if ($window.navigator && $window.navigator.geolocation) {
$window.navigator.geolocation.getCurrentPosition(function(position){
$rootScope.$apply(function(){deferred.resolve(position);});
}, function(error) {
$rootScope.$broadcast('error',geolocation_msgs['errors.location.notFound']);
$rootScope.$apply(function(){deferred.reject(geolocation_msgs['errors.location.notFound']);});
});
}
else
{
$rootScope.$broadcast('error',geolocation_msgs['errors.location.unsupportedBrowser']);
$rootScope.$apply(function(){deferred.reject(geolocation_msgs['errors.location.unsupportedBrowser']);});
}
console.log(deferred.promise);
return deferred.promise;
}
};
}]);
geocoder
// uses ngStorage module
//based on https://gist.github.com/benmj/6380466
//http://stackoverflow.com/questions/14464945/add-queueing-to-angulars-http-service
'use strict';
angular.module('geocoder', ['ngStorage']).factory('Geocoder', function ($localStorage, $q, $timeout) {
var locations = $localStorage.locations ? JSON.parse($localStorage.locations) : {};
var queue = [];
// Amount of time (in milliseconds) to pause between each trip to the
// Geocoding API, which places limits on frequency.
var queryPause = 250;
/**
* executeNext() - execute the next function in the queue.
* If a result is returned, fulfill the promise.
* If we get an error, reject the promise (with message).
* If we receive OVER_QUERY_LIMIT, increase interval and try again.
*/
var executeNext = function () {
var task = queue[0],
geocoder = new google.maps.Geocoder();
geocoder.geocode({'latLng': task.latlng}, function (result, status) {
if (status === google.maps.GeocoderStatus.OK) {
var geoaddress = {
address: result[1].formatted_address
};
queue.shift();
locations[task.latlng] = geoaddress;
$localStorage.locations = JSON.stringify(geoaddress);
task.d.resolve(geoaddress);
if (queue.length) {
$timeout(executeNext, queryPause);
}
} else if (status === google.maps.GeocoderStatus.ZERO_RESULTS) {
queue.shift();
task.d.reject({
type: 'zero',
message: 'Zero results for geocoding latlng ' + task.latlng
});
} else if (status === google.maps.GeocoderStatus.OVER_QUERY_LIMIT) {
queryPause += 250;
$timeout(executeNext, queryPause);
} else if (status === google.maps.GeocoderStatus.REQUEST_DENIED) {
queue.shift();
task.d.reject({
type: 'denied',
message: 'Request denied for geocoding latlng ' + task.latlng
});
} else if (status === google.maps.GeocoderStatus.INVALID_REQUEST) {
queue.shift();
task.d.reject({
type: 'invalid',
message: 'Invalid request for geocoding latlng' + task.latlng
});
}
});
};
return {
addressForLatLng : function (lat, lng) {
var d = $q.defer();
var lat = parseFloat(lat);
var lng = parseFloat(lng);
var latlng = new google.maps.LatLng(lat, lng);
if (latlng in locations) {
$timeout(function () {
d.resolve(locations[latlng]);
});
} else {
queue.push({
latlng: latlng,
d: d
});
if (queue.length === 1) {
executeNext();
}
}
return d.promise;
}
};
});
//usage:
angular.module('myApp',['geolocation', 'geocoder'])
.controller('geoCtrl', function ($scope,geolocation,Geocoder ) {
geolocation.getLocation().then(function(data){
console.log(data);
Geocoder.addressForLatLng(data.coords.latitude, data.coords.longitude).then(function(data){
console.log(data)
})
});
});
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