Facebook JS SDK for AngularJS

angular-facebook.js

angular.module('Nuclight.Services.Facebook', [])
    .provider('facebook', function () {
        var fb_options = {};
        var fb_lang = 'en_US';

        this.init = function (options, lang) {
            fb_options = options;
            if (lang) fb_lang = lang;
        };

        this.$get = ['$window', '$q',
            function ($window, $q) {

                var d = $q.defer();

                $window.fbAsyncInit = function () {
                    FB.init(fb_options);

                    d.resolve(FB);
                };

                (function (d, s, id) {
                    var js, fjs = d.getElementsByTagName(s)[0];
                    if (d.getElementById(id)) {
                        return;
                    }
                    js = d.createElement(s);
                    js.id = id;
                    js.src = "//connect.facebook.net/"+fb_lang+"/all.js";
                    fjs.parentNode.insertBefore(js, fjs);
                }($window.document, 'script', 'facebook-jssdk'));

                return d.promise;
            }
        ]
    });