fbasyncinit.js

<script>
// fbAsyncInit
// http://developers.facebook.com/docs/reference/javascript/FB.getLoginStatus/
window.fbAsyncInit = function() {
	// init the FB JS SDK
	FB.init({
		appId: '<?php echo(FB_APP_ID); ?>',
		status: true,
		cookie: true,
		xfbml: true,
		oauth: true
	});
	// Additional initialization code such as adding Event Listeners goes here

	// declare objects
	var $start_button = $('#start_button > a');

	var login = function(success, cancel) {
		FB.login(function(response) {
			if (response.authResponse) {
				if (success) success();
			} else {
				if (cancel) cancel();
			}
		}, { scope: '<?php echo FB_APP_SCOPE; ?>' });
	};
	var check_page_like = function(success, failure) {
		FB.api('/me/likes/<?php echo FB_PAGE_ID?>', function(response) {
			if (response.data.length) {
				if (success) success();
			} else {
				if (failure) failure();
			}
		});
	};
	// To determine if a user has authenticated your app:
	FB.getLoginStatus(function(response) {
	});
	FB.Event.subscribe('auth.statusChange', function(response) {
		console.log('auth.statusChange: ', response.status);
		if (response.status === 'connected') {
			$start_button.on('click', function() {
				check_page_like(function() {
					location.href = '../../diagnosis/info';
				}, function() {
					// TODO: DEPRECATED display:none
					$('#like_box').css('display', 'block');
				});
			});
		} else if (response.status === 'not_authorized') {
			$start_button.on('click', function() {
				login(function() {
					$start_button.off('click');
				}, function() {
				});
			});
		} else {
			$start_button.on('click', function() {
				login(function() {
					$start_button.off('click');
				}, function() {
				});
			});
		}
	});
	FB.Event.subscribe('edge.create', function(response) {
		location.href = '../../diagnosis/info';
	});
};
// 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/all.js";
	fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>