Sweepstakes Facebook Autofill

setupSweepsMethods: function() {

	var that = this;

	// autofill button does a couple of things
	// 1. Login to facebook if they already aren't and grab permissions for email and birthday
	// 2. Extract as much data as we can for the sweepstakes form
	// 3. Populate the sweepstakes with new data
	$('.autofill_button').click( function(event) {

		event.preventDefault();

		var defferedObject = new $.Deferred();

		// kick off the dance party by logging into Facebook
		that.facebookLogin(defferedObject)

		// once Facebook returns data, parse it out and 
		defferedObject.done(function(){
		
			//console.log(that.app_data.facebook_data); 

			that.populateSweepstakes();

		});    	
		
	});

},

populateSweepstakes: function() {

	var that = this;

	// check if we even have facebook data
	if( that.app_data.facebook_data ) {

		// grab first name
		var first_name = that.app_data.facebook_data.first_name;
		
		// grab last name
		var last_name = that.app_data.facebook_data.last_name;

		// grab email
		var email = that.app_data.facebook_data.email;

		// grab birthday
		var birthdate = that.app_data.facebook_data.birthday;

		// insert data back into sweepstakes
		$('[name="entry[name][first_name]"]').val( first_name );
      	$('[name="entry[name][last_name]"]').val( last_name );

      	// check for FB proxy email address which we are not allowed to use
        var emailCheck = email.split('@');
        if ( emailCheck[1] != 'proxymail.facebook.com' ) {
        	$('.engagements_field_email').find('input').val( email );
        }

        // split up birthday and inject it into sweepstakes
        birthdate = birthdate.split('/');
        $('[name="entry[birthday][year]"]').val( birthdate[2] );
      	$('[name="entry[birthday][month]"]').val( birthdate[1].replace(/^0+/, '') );
      	$('[name="entry[birthday][day]"]').val( birthdate[0].replace(/^0+/, '') );

	}

},

facebookLogin: function(defferedObject) {

	var that = this;

	// login to facebook
	FB.login(function(response) {

		if (response.authResponse) {

			// request information from FB
	    	FB.api('/me', function(response) {
	       		
	       		that.app_data.facebook_data = response;
	       		
	       		// FB finished call and so resolve it
	       		defferedObject.resolve();

	     	});

	   	} else {
	   		// something went wrong
	    	console.warn( 'Failed to authenticate' );
	   
	   	}

	}, { scope: that.app_data.request_perms } );

},