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<!DOCTYPE html>
<html>
<head>
    <title>Facebook Login JavaScript Example</title>
    <meta charset="UTF-8">
</head>
<body>
<script>
    // This is called with the results from from FB.getLoginStatus().
    function statusChangeCallback(response) {
        console.log('statusChangeCallback');
        console.log(response);
        // The response object is returned with a status field that lets the
        // app know the current login status of the person.
        // Full docs on the response object can be found in the documentation
        // for FB.getLoginStatus().
        if (response.status === 'connected') {
            // Logged into your app and Facebook.
            testAPI();
        } else if (response.status === 'not_authorized') {
            // The person is logged into Facebook, but not your app.
            document.getElementById('status').innerHTML = 'Please log ' +
                    'into this app.';
        } else {
            // The person is not logged into Facebook, so we're not sure if
            // they are logged into this app or not.
            document.getElementById('status').innerHTML = 'Please log ' +
                    'into Facebook.';
        }
    }

    // This function is called when someone finishes with the Login
    // Button.  See the onlogin handler attached to it in the sample
    // code below.
    function checkLoginState() {
        FB.getLoginStatus(function(response) {
            statusChangeCallback(response);
        });
    }

    window.fbAsyncInit = function() {
        FB.init({
            appId      : '1044282122279266',
            cookie     : true,  // enable cookies to allow the server to access
                                // the session
            xfbml      : true,  // parse social plugins on this page
            version    : 'v2.2' // use version 2.2
        });

        // Now that we've initialized the JavaScript SDK, we call
        // FB.getLoginStatus().  This function gets the state of the
        // person visiting this page and can return one of three states to
        // the callback you provide.  They can be:
        //
        // 1. Logged into your app ('connected')
        // 2. Logged into Facebook, but not your app ('not_authorized')
        // 3. Not logged into Facebook and can't tell if they are logged into
        //    your app or not.
        //
        // These three cases are handled in the callback function.

        FB.getLoginStatus(function(response) {
            statusChangeCallback(response);
        });

    };

    // Load the SDK asynchronously
    (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/en_US/sdk.js";
        fjs.parentNode.insertBefore(js, fjs);
    }(document, 'script', 'facebook-jssdk'));

    // Here we run a very simple test of the Graph API after login is
    // successful.  See statusChangeCallback() for when this call is made.
    function testAPI() {
        console.log('Welcome!  Fetching your information.... ');
        FB.api('/me', function(response) {
            console.log('Successful login for: ' + response.name);
            document.getElementById('status').innerHTML =
                    'Thanks for logging in, ' + response.name + '!';
        });
    }
</script>

<!--
  Below we include the Login Button social plugin. This button uses
  the JavaScript SDK to present a graphical Login button that triggers
  the FB.login() function when clicked.
-->

<fb:login-button scope="public_profile,email" onlogin="checkLoginState();">
</fb:login-button>

<div id="status">
</div>

</body>
</html>