Created
February 12, 2011 02:53
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gets a codified location from any search or current locationand calls a callback with that result
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| <html> | |
| <head> | |
| <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.5.0/jquery.min.js"></script> | |
| <script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script> | |
| <script type="text/javascript" src="http://code.google.com/apis/gears/gears_init.js"></script> | |
| <script type="text/javascript" src="http://cdn.simplegeo.com/js/1.2/simplegeo.all.jq.min.js"></script> | |
| <script type="text/javascript" charset="utf-8"> | |
| ;var Maps = function(){ | |
| var usefulGoogleMapsMapping = { administrative_area_level_1: 'state', administrative_area_level_2: 'county', locality: 'city', postal_code: 'zip' }, | |
| geocoder = new google.maps.Geocoder(), | |
| defaultOptions = {promptNative: true}, | |
| geoClient; | |
| function init(options){ | |
| if(typeof options == 'undefined'){options={};} | |
| if(options.geoKey){ | |
| geoClient = new simplegeo.ContextClient(options.geoKey); | |
| } | |
| if(options.promptNative != null){ | |
| defaultOptions.promptNative = options.promptNative; | |
| } | |
| if(options.ip != null){ | |
| defaultOptions.ip = options.ip; | |
| } | |
| } | |
| function mergeOptions(options, defaultOptions){ | |
| for (attrname in defaultOptions) { if(typeof options[attrname] == 'undefined'){options[attrname] = defaultOptions[attrname];} } | |
| return options; | |
| } | |
| function search(term, callback){ | |
| geocoder.geocode( {address: term}, function(result, status) { | |
| var addressIWant = convertGoogleToUsable(result); | |
| addressIWant.term = term; | |
| callback(addressIWant); | |
| }); | |
| } | |
| // options {promptNative: (true|false), ipAddress: 'ip'} | |
| function currentLocation(options, callback){ | |
| if(typeof callback == 'undefined'){ callback = options; options = {};} //to allow no options | |
| options = mergeOptions(options, defaultOptions); | |
| tryBrowserNative(options, callback) || | |
| tryGoogleGears(options, callback) || | |
| tryViaIPAddress(options, callback) || | |
| emptyCallback(callback); | |
| } | |
| function tryBrowserNative(options, callback){ | |
| if(!options.promptNative || !navigator.geolocation){return false;} | |
| navigator.geolocation.getCurrentPosition(function(position) { | |
| //success from browser | |
| callbackFromPosition('navigator', position, callback); | |
| }, function() { | |
| // failure from browser | |
| tryGoogleGears(options, callback) || tryViaIPAddress(options, callback) || emptyCallback(callback); | |
| }); | |
| return true; | |
| } | |
| function tryGoogleGears(options, callback){ | |
| if(!google.gears){ return false;} | |
| var geo = google.gears.factory.create('beta.geolocation'); | |
| geo.getCurrentPosition(function(position) { | |
| //success from gears | |
| callbackFromPosition('gears', position, callback); | |
| }, function() { | |
| //failure from gears, try via IP | |
| tryViaIPAddress(options, callback) || emptyCallback(callback); | |
| }); | |
| return true; | |
| } | |
| function tryViaIPAddress(options, callback){ | |
| if(!options.ip || !geoClient){return false;} | |
| geoClient.getLocationFromIP(options.ip, function(err, position){ | |
| if(!err){ | |
| callbackFromPosition('ip', position, callback); | |
| }else{ | |
| emptyCallback(callback); | |
| } | |
| }); | |
| return true; | |
| } | |
| function emptyCallback(callback){ | |
| callback(null); | |
| } | |
| function callbackFromPosition(source, position, callback){ | |
| var l = new google.maps.LatLng(position.coords.latitude, position.coords.longitude); | |
| geocoder.geocode({'location': l}, function(result, status){ | |
| // success from google | |
| var addressIWant = convertGoogleToUsable(result); | |
| addressIWant.source = source; | |
| callback(addressIWant); | |
| }); | |
| } | |
| function convertGoogleToUsable(result){ | |
| var rawAddress = result[0]['address_components']; | |
| var addressIWant = {formatted_address: result[0].formatted_address}; | |
| rawAddress.forEach(function(item){ | |
| addressIWant[usefulGoogleMapsMapping[item.types[0]] || item.types[0]] = item.short_name; | |
| }); | |
| return addressIWant; | |
| } | |
| return { | |
| init: init, | |
| search: search, | |
| currentLocation: currentLocation, | |
| defaultOptions: defaultOptions | |
| }; | |
| }(); | |
| //USAGE: | |
| //defaultOptions: {promptNative: true} | |
| Maps.init({promptNative: true, ip: '173.228.44.97', geoKey:'simpleGeoKey'}); | |
| Maps.search('The White House', function(result){ | |
| console.log('search:', result); | |
| }); | |
| Maps.currentLocation({promptNative: false, ip: '194.125.35.12'}, function(result){ | |
| console.log('currentLocation:', result); | |
| }); | |
| </script> | |
| </head> | |
| </html> |
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