AgularJSBooks/app/controllers/header.controller.js

(function ()
{
    'use strict';

    app.controller('Header', [ '$scope','$translate',function ($scope, $translate){
        $scope.isLogged = function() {
        	return localStorage.getItem('authToken') ? true : false;
        };
        $scope.langSwitch = function(){
            var lang = localStorage.getItem('preferredLanguage');
            var curentleng = lang === 'en'? 'ru' : 'en';
            $translate.use(curentleng);
            localStorage.setItem('preferredLanguage', curentleng);
        }
    }
    ]);

}
)();