Best way to change html header on User Login AngularJS
<p>I'm working on an Angular Application in which the main page (where the angular module is initialize) has a header where I want to show different divs if the user is logged or not.</p>

<p>Here is the header code fragment of the index.html:</p>

<pre><code>&lt;header ng-controller="HeaderController"&gt;
    &lt;div class="container"&gt;
        &lt;div class="row"&gt;
            &lt;div class="col-lg-12 col-xs-12"&gt;
                &lt;div class="col-lg-3 col-md-3 col-sm-6 col-xs-6 none"&gt;
                    &lt;a class="navbar-brand" href="#page-top"&gt;&lt;img src="Content/img/logo.png" class="img-responsive" alt="logo"&gt;&lt;/a&gt;
                &lt;/div&gt;
                &lt;div class="col-lg-3 col-md-3 col-sm-3 col-xs-4 col-lg-offset-6 col-md-offset-6 col-sm-offset-9" ng-if="showloginheader"&gt;
                    &lt;!--ng-if="showloginheader"--&gt;
                    &lt;span href="#" class="button-login" id="toggle-login" ng-click="OnLoginClick()"&gt;Ingresar&lt;/span&gt;&lt;img src="Content/img/logo.png" id="logo_min" alt="logo"&gt;
                    &lt;div id="login" ng-controller="LoginController"&gt;
                        &lt;form name="loginForm" ng-submit="login()" role="form"&gt;
                            &lt;input type="text" placeholder="Ingresá el usuario" required ng-model="username" /&gt;
                            &lt;input type="password" placeholder="Ingresá la contraseña" required ng-model="password" /&gt;
                            &lt;!--&lt;input type="submit" class="login" value="Ingresar" /&gt;--&gt;
                            &lt;input type="checkbox" id="checkbox" checked&gt;&lt;div class="reco-contra"&gt;Recordar contraseña&lt;/div&gt;
                            &lt;div class="olvi-contra"&gt;&lt;a&gt;Olvidaste la contraseña?&lt;/a&gt;&lt;/div&gt;
                            &lt;!--&lt;div class="form-actions"&gt;--&gt;
                            &lt;input type="submit" class="login" value="Ingresar" /&gt; &lt;!-- ng-disabled="form.$invalid || vm.dataLoading" --&gt;
                            &lt;input type="submit" id="clase-fb" value="Ingresar con Facebook" /&gt;
                            &lt;input type="submit" id="clase-tw" value="Ingresar con Twitter" /&gt;
                            &lt;input type="submit" id="clase-goo" value="Ingresar con Google" /&gt;
                            &lt;div class="olvi-contra"&gt;&lt;a&gt;Olvidaste la contraseña?&lt;/a&gt;&lt;/div&gt;
                        &lt;/form&gt;
                        &lt;a href="#/register"&gt;&lt;input type="submit" value="&amp;iexcl;Registrate ahora!" /&gt;&lt;/a&gt;
                    &lt;/div&gt;
                &lt;/div&gt;
                &lt;div class="col-lg-3 col-md-3 col-sm-3 col-xs-4 col-lg-offset-6 col-md-offset-6 col-sm-offset-9" ng-if="showcurrentuserheader"&gt;&lt;!--ng-if="showcurrentuserheader"--&gt;
                    &lt;span href="#" class="log-img" id="toggle-login"&gt;&lt;img src="img/fefe.png" alt="logo"&gt;Pablo&lt;/span&gt;
                    &lt;div id="login"&gt;
                        &lt;div id="login-ok"&gt;
                            &lt;div class="opcion-log"&gt;
                                &lt;a href="recetas_obtenidas.html"&gt;&lt;strong&gt;RECETAS OBTENIDAS&lt;/a&gt;&lt;/strong&gt;
                            &lt;/div&gt;
                            &lt;div class="opcion-log"&gt;
                                &lt;a href="perfil.html"&gt;&lt;i class="fa fa-cog fa-spin"&gt;&lt;/i&gt;  PERFIL&lt;/a&gt;
                            &lt;/div&gt;
                            &lt;div class="opcion-log"&gt;
                                &lt;a href="#"&gt;CERRAR SESION&lt;/a&gt;
                            &lt;/div&gt;
                        &lt;/div&gt;
                    &lt;/div&gt;
                &lt;/div&gt;
            &lt;/div&gt;
        &lt;/div&gt;
    &lt;/div&gt;
&lt;/header&gt;
</code></pre>

<p>You can notice that there are two divs below the logo, what I want to achieve is to show the first div (the one that has a "ng-if=showloginheader") meanwhile the user isn't logged in and then show the other one when the user gets into the application (has a "ng-if=showcurrentuserheader").</p>

<p>I would like to know which would be the best option to do this, until now I have tried to do it with the ng-if directive.</p>

<p>First I initialize the variables throw a service (to make it accesible by several controllers):</p>

<pre><code>(function () {
    'use strict';

    angular
        .module('iziCooker')
        .factory('UserService', UserService);

    UserService.$inject = ['$http'];
    function UserService($http) {
        var service = {};
        var showloginheader = true;
        var showcurrentuserheader = false;

        service.GetLoginHeaderState = GetLoginHeaderState;
        service.GetCurrentUserHeaderState = GetCurrentUserHeaderState;
        service.ChangeHeadersVisibility = ChangeHeadersVisibility;

        return service;

                function GetLoginHeaderState() {
                return showloginheader;
            }

            function GetCurrentUserHeaderState() {
                return showcurrentuserheader;
            }

            function ChangeHeadersVisibility() {
                showloginheader = false;
                showcurrentuserheader = true;
            }

    }
})();
</code></pre>

<p>Then I assign those values in the HeaderController:</p>

<pre><code>    (function () {
    'use strict';

    angular
        .module('iziCooker')
        .controller('HeaderController', HeaderController);

    HeaderController.$inject = ['$scope', 'UserService'];
    function HeaderController($scope, UserService) {
        $scope.showloginheader = UserService.GetLoginHeaderState();
        $scope.showcurrentuserheader = UserService.GetCurrentUserHeaderState();

    }

})();
</code></pre>

<p>Up to this point, this works properly because the HeaderController is injected when the application starts (it's in the "master page" of Angular, index.html).</p>

<p>But then I tried to change the variables values in the login controller after you got a successful response from the DB to get into the application.</p>

<pre><code>    (function () {
    'use strict';

    angular
        .module('iziCooker')
        .controller('LoginController', LoginController);

    LoginController.$inject = ['$location', 'AuthenticationService', 'FlashService', '$scope', 'UserService'];
    function LoginController($location, AuthenticationService, FlashService, $scope, UserService) {
        $scope.dataLoading = false;
        $scope.username = "";
        $scope.password = "";

        console.log("Login Controller Loaded!");

        //vm.login = login;

        (function initController() {
            // reset login status
            AuthenticationService.ClearCredentials();
        })();

      $scope.login =  function login() {
          $scope.dataLoading = true;
          AuthenticationService.Login($scope.username, $scope.password, function (response) {
                if (response.success) {
                    AuthenticationService.SetCredentials($scope.username, $scope.username);
                    UserService.ChangeHeadersVisibility();
                    $location.path('/map');
                } else {
                    FlashService.Error(response.message);
                    $scope.dataLoading = false;
                }
            });
      };

    }

})();
</code></pre>

<p>When I am redirected to the "/map" view, it still shows the first div. It seems that those ng-if variables aren't updated or something like that. Perhaps I'm missing something.</p>

<p>I'm almost sure that this isn't the way to do this, so I would to know if I must change something or change completely the code.</p>

<p>Thank you.</p>

<p>Edit:</p>

<p>Authentication Service</p>

<pre><code>    (function () {
    'use strict';

    angular
        .module('iziCooker')
        .factory('AuthenticationService', AuthenticationService);

    AuthenticationService.$inject = ['$http', '$cookieStore', '$rootScope', '$timeout', 'UserService'];
    function AuthenticationService($http, $cookieStore, $rootScope, $timeout, UserService) {
        var service = {};

        service.Login = Login;
        service.SetCredentials = SetCredentials;
        service.ClearCredentials = ClearCredentials;

        return service;

        function Login(username, password, callback) {

            /* Dummy authentication for testing, uses $timeout to simulate api call
             ----------------------------------------------*/
            //$timeout(function () {
            //    var response;
            //    UserService.GetByUsername(username)
            //        .then(function (user) {
            //            if (user !== null &amp;&amp; user.password === password) {
            //                response = { success: true };
            //            } else {
            //                response = { success: false, message: 'Username or password is incorrect' };
            //            }
            //            callback(response);
            //        });
            //}, 1000);

            /* Use this for real authentication
             ----------------------------------------------*/
            $http.post('ws/api/Usuario/Login', { username: username, password: password })
                .success(function (response) {
                    callback(response);
                });

        }

        function SetCredentials(username, password) {
            var authdata = Base64.encode(username + ':' + password);

            $rootScope.globals = {
                currentUser: {
                    username: username,
                    authdata: authdata
                }
            };

            $http.defaults.headers.common['Authorization'] = 'Basic ' + authdata; // jshint ignore:line
            $cookieStore.put('globals', $rootScope.globals);
        }

        function ClearCredentials() {
            $rootScope.globals = {};
            $cookieStore.remove('globals');
            $http.defaults.headers.common.Authorization = 'Basic';
        }
    }

    // Base64 encoding service used by AuthenticationService
    var Base64 = {

        keyStr: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',

        encode: function (input) {
            var output = "";
            var chr1, chr2, chr3 = "";
            var enc1, enc2, enc3, enc4 = "";
            var i = 0;

            do {
                chr1 = input.charCodeAt(i++);
                chr2 = input.charCodeAt(i++);
                chr3 = input.charCodeAt(i++);

                enc1 = chr1 &gt;&gt; 2;
                enc2 = ((chr1 &amp; 3) &lt;&lt; 4) | (chr2 &gt;&gt; 4);
                enc3 = ((chr2 &amp; 15) &lt;&lt; 2) | (chr3 &gt;&gt; 6);
                enc4 = chr3 &amp; 63;

                if (isNaN(chr2)) {
                    enc3 = enc4 = 64;
                } else if (isNaN(chr3)) {
                    enc4 = 64;
                }

                output = output +
                    this.keyStr.charAt(enc1) +
                    this.keyStr.charAt(enc2) +
                    this.keyStr.charAt(enc3) +
                    this.keyStr.charAt(enc4);
                chr1 = chr2 = chr3 = "";
                enc1 = enc2 = enc3 = enc4 = "";
            } while (i &lt; input.length);

            return output;
        },

        decode: function (input) {
            var output = "";
            var chr1, chr2, chr3 = "";
            var enc1, enc2, enc3, enc4 = "";
            var i = 0;

            // remove all characters that are not A-Z, a-z, 0-9, +, /, or =
            var base64test = /[^A-Za-z0-9\+\/\=]/g;
            if (base64test.exec(input)) {
                window.alert("There were invalid base64 characters in the input text.\n" +
                    "Valid base64 characters are A-Z, a-z, 0-9, '+', '/',and '='\n" +
                    "Expect errors in decoding.");
            }
            input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

            do {
                enc1 = this.keyStr.indexOf(input.charAt(i++));
                enc2 = this.keyStr.indexOf(input.charAt(i++));
                enc3 = this.keyStr.indexOf(input.charAt(i++));
                enc4 = this.keyStr.indexOf(input.charAt(i++));

                chr1 = (enc1 &lt;&lt; 2) | (enc2 &gt;&gt; 4);
                chr2 = ((enc2 &amp; 15) &lt;&lt; 4) | (enc3 &gt;&gt; 2);
                chr3 = ((enc3 &amp; 3) &lt;&lt; 6) | enc4;

                output = output + String.fromCharCode(chr1);

                if (enc3 != 64) {
                    output = output + String.fromCharCode(chr2);
                }
                if (enc4 != 64) {
                    output = output + String.fromCharCode(chr3);
                }

                chr1 = chr2 = chr3 = "";
                enc1 = enc2 = enc3 = enc4 = "";

            } while (i &lt; input.length);

            return output;
        }
    };

})();
</code></pre>