roboto-promoto/app/scripts/services/auth.js

'use strict';

angular.module('robotoPromotoApp')
.factory('Auth', function Auth($location, $rootScope, Session, User, $cookieStore) {

    // Get currentUser from cookie
    $rootScope.currentUser = $cookieStore.get('user') || null;
    $cookieStore.remove('user');

    return {

        /**
         * Authenticate user
         * 
         * @param  {Object}   user     - login info
         * @param  {Function} callback - optional
         * @return {Promise}            
         */
        login: function(user, callback) {
            var cb = callback || angular.noop;

            return Session.save({
                email: user.email,
                password: user.password
            }, function(user) {
                $rootScope.currentUser = user;
                return cb();
            }, function(err) {
                return cb(err);
            }).$promise;
        },

        /**
         * Unauthenticate user
         * 
         * @param  {Function} callback - optional
         * @return {Promise}           
         */
        logout: function(callback) {
            var cb = callback || angular.noop;

            return Session.delete(function() {
                $rootScope.currentUser = null;
                return cb();
            },
            function(err) {
                return cb(err);
            }).$promise;
        },

        /**
         * Create a new user
         * 
         * @param  {Object}   user     - user info
         * @param  {Function} callback - optional
         * @return {Promise}            
         */
        createUser: function(user, callback) {
            var cb = callback || angular.noop;
            return User.save(user, function(user) {
                 $rootScope.currentUser = user;
                 return cb(user);
             }, function(err) {
                 return cb(err);
             }).$promise;
        },

        /**
         * Change password
         * 
         * @param  {String}   oldPassword 
         * @param  {String}   newPassword 
         * @param  {Function} callback    - optional
         * @return {Promise}              
         */
        changePassword: function(oldPassword, newPassword, callback) {
            var cb = callback || angular.noop;

            return User.update({
                oldPassword: oldPassword,
                newPassword: newPassword
            }, function(user) {
                return cb(user);
            }, function(err) {
                return cb(err);
            }).$promise;
        },

        /**
         * Gets all available info on authenticated user
         * 
         * @return {Object} user
         */
        currentUser: function() {
            return User.get();
        },

        /**
         * Simple check to see if a user is logged in
         * 
         * @return {Boolean}
         */
        isLoggedIn: function() {
            var user = $rootScope.currentUser;
            return !!user;
        },
    };
});