Login and Get Perms with a click of a button

fblogin-onebutton.js

// LOGIN AND GET PERMS WHEN THE USER CLICKS <div id="yes"><a></a></div>

(function($){
	var app = app || {
		init: function(){
			console.log("INIT");

			FB.getLoginStatus(function(response) {
			  if (response.status === 'connected') {
			    var uid = response.authResponse.userID;
			    var accessToken = response.authResponse.accessToken;

			    $(document).on('click', '#yes a', function(){
			    	app.getData();
			    });
			  } else if (response.status === 'not_authorized') {
			  	// Logged in but not authorized
			    $(document).on('click', '#yes a', function(){
			    	app.login(app.getData);
			    });
			  } else {
			    // the user isn't logged in to Facebook.
			    $(document).on('click', '#yes a', function(){
			    	app.login(app.getData);
			    });
			  }
			 });
		},
		login: function(callback){
			 FB.login(function(response) {
			   if (response.authResponse) {
			   	if(typeof callback == 'function'){
				    callback();
			   	} else {
				    $(document).on('click', '#yes a', function(){
				    	app.getData();
				    });
			   	}
			   } else {
			     alert('You must accept permissions to proceed');
			   }
			 }, {scope: 'email'});
		},
		getData: function(){
			FB.api('/me', function(response){
				// Response contains all the user FB data
				console.log(response);
			})
		}
	};

	$(document).on('afterfbinit', function(){
		app.init();
	});
})(jQuery);