FB Extended Javascript Library 1.0

FbApiHandler-1.0.js

/**
 * FB Extended
 * Jose Luis Quintana <www.joseluisquintana.pe>
 * Reference: https://developers.facebook.com/docs/javascript/reference/FB.api
 */
function FbApiHandler(options, fn) {
    var ready = false;
    this.options = null;
    this.response = null;

    this.initialize = function(options, fn) {
        this.options = options;
        ready = !!(window.FB || false);

        if (ready) {
            this.onReady(fn);
        } else {
            window.fbAsyncInit = function() {
                this.onReady(fn);
            }.bind(this);

            this.requireJSDK();
        }
    };

    this.isReady = function() {
        return ready;
    };

    this.onReady = function(fn) {
        FB.init(options);
        ready = true;
        fn.apply(this, [ready]);
    };

    this.connect = function(fn) {
        if (ready) {
            FB.getLoginStatus(function(response) {
                if (response.status === 'not_authorized') {
                    this.login(fn);
                } else {
                    if (response.status === 'connected') {
                        this.getProfile(response, fn);
                    } else if (response.status === 'not_authorized') {
                        // the user is logged in to Facebook,
                        // but has not authenticated your app
                        _callback(response, 'The user is logged in to Facebook, but has not authenticated your app.', fn);
                    } else {
                        this.login(fn);
                    }
                }
            }.bind(this));
        } else {
            this.error("Facebook JS SDK is not loaded !");
        }
    };

    this.getProfile = function(header, fn) {
        FB.api('/me', function(response) {
            _callback(header, response, fn);
        });
    };

    // https://developers.facebook.com/docs/facebook-login/permissions/
    // publish_actions
    this.login = function(fn) {
        console.log('Login..');
        FB.login(function(response) {
            if (response.authResponse) {
                this.getProfile(response, fn);
            } else {
                _callback(response, null, fn);
            }
        }.bind(this), {
            scope: 'email'
        });
    };

    this.logout = function(fn) {
        FB.logout(function() {
            _callback(null, null, fn);
        });
    };

    this.getProfileBy = function(id, fn) {
        FB.api('/' + id, function(response) {
            _callback(response, null, fn);
        });
    };

    this.error = function(str) {
        if (window.console) {
            window.console.error(str);
        }
    };
    this.post = function(message, fn) {
        FB.api('/me/feed', 'post', {message: message}, function(response) {
            _callback(response, null, fn);
        });
    };

//    method: 'feed',
//    name: '',
//    link: '',
//    picture: '',
//    caption: '',
//    description: ''
    this.share = function(options, fn) {
        FB.ui(options, function(response) {
            _callback(null, response, fn);
        });
    };

    _callback = function(header, response, fn) {
        this.response = {"header": header, "response": response};

        if (fn) {
            fn.apply(this, [this.response]);
        }
    }.bind(this);

    this.requireJSDK = function() {
        if (this.options.requireJSDK) {
            var fbroot = document.createElement('div');
            fbroot.id = 'fb-root';
            document.body.insertBefore(fbroot, document.body.firstChild);

            (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/es_ES/all.js";
                fjs.parentNode.insertBefore(js, fjs);
            }(document, 'script', 'facebook-jssdk'));
        }
    };

    this.initialize(options, fn);
}