Allow non-admin login to the control panel and show/hide menu items depending on the login state

* When logged out, no menu items are shown.
* When logged in, Log Out is shown.
* When logged in as an admin, the remaining menu items are also shown.
* When logged in as a non-admin, the mail and contacts/calendar instruction pages are shown.

Fixes #1987

management/templates/index.html

@@ -62,6 +62,9 @@
 	    ol li {
 	       margin-bottom: 1em;
 	    }
+
+            .if-logged-in { display: none; }
+            .if-logged-in-admin { display: none; }
         </style>
         <link rel="stylesheet" href="/admin/assets/bootstrap/css/bootstrap-theme.min.css">
     </head>
@@ -83,7 +86,7 @@
         </div>
         <div class="navbar-collapse collapse">
           <ul class="nav navbar-nav">
-            <li class="dropdown">
+            <li class="dropdown if-logged-in-admin">
               <a href="#" class="dropdown-toggle" data-toggle="dropdown">System <b class="caret"></b></a>
               <ul class="dropdown-menu">
                 <li><a href="#system_status" onclick="return show_panel(this);">Status Checks</a></li>
@@ -96,7 +99,8 @@
                 <li><a href="/admin/munin" target="_blank">Munin Monitoring</a></li>
               </ul>
             </li>
-            <li class="dropdown">
+            <li><a href="#mail-guide" onclick="return show_panel(this);" class="if-logged-in-not-admin">Mail</a></li>
+            <li class="dropdown if-logged-in-admin">
               <a href="#" class="dropdown-toggle" data-toggle="dropdown">Mail &amp; Users <b class="caret"></b></a>
               <ul class="dropdown-menu">
                 <li><a href="#mail-guide" onclick="return show_panel(this);">Instructions</a></li>
@@ -107,11 +111,11 @@
                 <li><a href="#mfa" onclick="return show_panel(this);">Two-Factor Authentication</a></li>
               </ul>
             </li>
-            <li><a href="#sync_guide" onclick="return show_panel(this);">Contacts/Calendar</a></li>
+            <li><a href="#sync_guide" onclick="return show_panel(this);" class="if-logged-in">Contacts/Calendar</a></li>
-            <li><a href="#web" onclick="return show_panel(this);">Web</a></li>
+            <li><a href="#web" onclick="return show_panel(this);" class="if-logged-in-admin">Web</a></li>
           </ul>
           <ul class="nav navbar-nav navbar-right">
-            <li><a href="#" onclick="do_logout(); return false;" style="color: white">Log out</a></li>
+            <li class="if-logged-in"><a href="#" onclick="do_logout(); return false;" style="color: white">Log out</a></li>
           </ul>
         </div><!--/.navbar-collapse -->
       </div>
@@ -302,7 +306,7 @@ function ajax_with_indicator(options) {
   return false; // handy when called from onclick
 }
 
-var api_credentials = ["", ""];
+var api_credentials = null;
 function api(url, method, data, callback, callback_error, headers) {
   // from http://www.webtoolkit.info/javascript-base64.html
   function base64encode(input) {
@@ -350,9 +354,10 @@ function api(url, method, data, callback, callback_error, headers) {
       // We don't store user credentials in a cookie to avoid the hassle of CSRF
       // attacks. The Authorization header only gets set in our AJAX calls triggered
       // by user actions.
+      if (api_credentials)
         xhr.setRequestHeader(
           'Authorization',
-        'Basic ' + base64encode(api_credentials[0] + ':' + api_credentials[1]));
+          'Basic ' + base64encode(api_credentials.username + ':' + api_credentials.session_key));
     },
     success: callback,
     error: callback_error || default_error,
@@ -375,7 +380,7 @@ function do_logout() {
   api("/logout", "POST");
 
   // Forget the token.
-  api_credentials = ["", ""];
+  api_credentials = null;
   if (typeof localStorage != 'undefined')
     localStorage.removeItem("miab-cp-credentials");
   if (typeof sessionStorage != 'undefined')
@@ -383,6 +388,9 @@ function do_logout() {
 
   // Return to the start.
   show_panel('login');
+
+  // Reset menus.
+  show_hide_menus();
 }
 
 function show_panel(panelid) {
@@ -405,15 +413,21 @@ function show_panel(panelid) {
 
 $(function() {
   // Recall saved user credentials.
+  try {
     if (typeof sessionStorage != 'undefined' && sessionStorage.getItem("miab-cp-credentials"))
-    api_credentials = sessionStorage.getItem("miab-cp-credentials").split(":");
+      api_credentials = JSON.parse(sessionStorage.getItem("miab-cp-credentials"));
     else if (typeof localStorage != 'undefined' && localStorage.getItem("miab-cp-credentials"))
-    api_credentials = localStorage.getItem("miab-cp-credentials").split(":");
+      api_credentials = JSON.parse(localStorage.getItem("miab-cp-credentials"));
+  } catch (_) {
+  }
+
+  // Toggle menu state.
+  show_hide_menus();
 
   // Recall what the user was last looking at.
-  if (typeof localStorage != 'undefined' && localStorage.getItem("miab-cp-lastpanel")) {
+  if (api_credentials != null && typeof localStorage != 'undefined' && localStorage.getItem("miab-cp-lastpanel")) {
     show_panel(localStorage.getItem("miab-cp-lastpanel"));
-  } else if (api_credentials[0] != "") {
+  } else if (api_credentials != null) {
     show_panel('welcome');
   } else {
     show_panel('login');

management/templates/login.html

@@ -102,7 +102,7 @@ function do_login() {
   }
 
   // Exchange the email address & password for an API key.
-  api_credentials = [$('#loginEmail').val(), $('#loginPassword').val()]
+  api_credentials = { username: $('#loginEmail').val(), session_key: $('#loginPassword').val() }
 
   api(
   "/login",
@@ -141,7 +141,9 @@ function do_login() {
       // Login succeeded.
 
       // Save the new credentials.
-      api_credentials = [response.email, response.api_key];
+      api_credentials = { username: response.email,
+                          session_key: response.api_key,
+                          privileges: response.privileges };
 
       // Try to wipe the username/password information.
       $('#loginEmail').val('');
@@ -152,14 +154,17 @@ function do_login() {
       // Remember the credentials.
       if (typeof localStorage != 'undefined' && typeof sessionStorage != 'undefined') {
         if ($('#loginRemember').val()) {
-          localStorage.setItem("miab-cp-credentials", api_credentials.join(":"));
+          localStorage.setItem("miab-cp-credentials", JSON.stringify(api_credentials));
           sessionStorage.removeItem("miab-cp-credentials");
         } else {
           localStorage.removeItem("miab-cp-credentials");
-          sessionStorage.setItem("miab-cp-credentials", api_credentials.join(":"));
+          sessionStorage.setItem("miab-cp-credentials", JSON.stringify(api_credentials));
         }
       }
 
+      // Toggle menus.
+      show_hide_menus();
+
       // Open the next panel the user wants to go to. Do this after the XHR response
       // is over so that we don't start a new XHR request while this one is finishing,
       // which confuses the loading indicator.
@@ -183,4 +188,19 @@ function show_login() {
     }
   });
 }
+
+function show_hide_menus() {
+  var is_logged_in = (api_credentials != null);
+  var privs = api_credentials ? api_credentials.privileges : [];
+  $('.if-logged-in').toggle(is_logged_in);
+  $('.if-logged-in-admin, .if-logged-in-not-admin').toggle(false);
+  if (is_logged_in) {
+    $('.if-logged-in-not-admin').toggle(true);
+    privs.forEach(function(priv) {
+      $('.if-logged-in-' + priv).toggle(true);
+      $('.if-logged-in-not-' + priv).toggle(false);
+    });
+  }
+  $('.if-not-logged-in').toggle(!is_logged_in);
+}
 </script>

management/templates/users.html

@@ -203,7 +203,7 @@ function users_set_password(elem) {
   var email = $(elem).parents('tr').attr('data-email');
 
   var yourpw = "";
-  if (api_credentials != null && email == api_credentials[0])
+  if (api_credentials != null && email == api_credentials.username)
     yourpw = "<p class='text-danger'>If you change your own password, you will be logged out of this control panel and will need to log in again.</p>";
 
   show_modal_confirm(
@@ -232,7 +232,7 @@ function users_remove(elem) {
   var email = $(elem).parents('tr').attr('data-email');
 
   // can't remove yourself
-  if (api_credentials != null && email == api_credentials[0]) {
+  if (api_credentials != null && email == api_credentials.username) {
     show_modal_error("Archive User", "You cannot archive your own account.");
     return;
   }
@@ -264,7 +264,7 @@ function mod_priv(elem, add_remove) {
   var priv = $(elem).parents('td').find('.name').text();
 
   // can't remove your own admin access
-  if (priv == "admin" && add_remove == "remove" && api_credentials != null && email == api_credentials[0]) {
+  if (priv == "admin" && add_remove == "remove" && api_credentials != null && email == api_credentials.username) {
     show_modal_error("Modify Privileges", "You cannot remove the admin privilege from yourself.");
     return;
   }