Alert in navigation bar if there is a new error in logs

docs-parent/TODO

@@ -1,2 +1 @@
-- Check regulary for > INFO logs (client)
 - Show number of files on documents list (client/server)

docs-web/src/main/java/com/sismics/docs/rest/resource/AppResource.java

@@ -110,6 +110,7 @@ public class AppResource extends BaseResource {
             throw new ForbiddenClientException();
         }
         checkBaseFunction(BaseFunction.ADMIN);
+        // TODO Change level by minLevel (returns all logs above)
 
         // Get the memory appender
         Logger logger = Logger.getRootLogger();

docs-web/src/main/webapp/app/docs/controller/Navigation.js

@@ -6,6 +6,41 @@
 App.controller('Navigation', function($scope, $http, $state, $rootScope, User, Restangular) {
   $rootScope.userInfo = User.userInfo();
 
+  // Last time when the errors logs was checked
+  $scope.lastLogCheck = new Date().getTime();
+
+  // Number of errors logs
+  $scope.errorNumber = 0;
+
+  // Check repeatedly if there is a new error log
+  setInterval(function() {
+    $scope.$apply(function() {
+      Restangular.one('app/log').get({
+        limit: 100,
+        level: 'ERROR'
+      }).then(function(data) {
+          // Add new errors
+          $scope.errorNumber += _.reduce(data.logs, function(number, log) {
+            if (log.date > $scope.lastLogCheck) {
+              return ++number; // It's a new error
+            }
+            return number; // Not a new error
+          }, 0);
+
+          // Update last check timestamp
+          $scope.lastLogCheck = new Date().getTime();
+        });
+    })
+  }, 10000);
+
+  /**
+   * Navigate to error logs.
+   */
+  $scope.openLogs = function() {
+    $scope.errorNumber = 0;
+    $state.transitionTo('settings.log');
+  };
+
   /**
    * User logout.
    */
@@ -17,6 +52,9 @@ App.controller('Navigation', function($scope, $http, $state, $rootScope, User, R
     $event.preventDefault();
   };
 
+  /**
+   * Returns true if at least an asynchronous request is in progress.
+   */
   $scope.isLoading = function() {
     return $http.pendingRequests.length > 0;
   };

docs-web/src/main/webapp/index.html

@@ -72,6 +72,11 @@
           </ul>
           
           <ul class="nav pull-right" ng-show="!userInfo.anonymous">
+            <li ng-show="errorNumber > 0">
+                <a href="#/settings/log" ng-click="openLogs()" class="nav-text-error">
+                  <span class="icon-warning-sign"></span> {{ errorNumber }} new error{{ errorNumber > 1 ? 's' : '' }}
+                </a>
+            </li>
             <li ng-class="{active: $uiRoute}" ui-route="/settings.*"><a href="#/settings/account"><span class="icon-cog"></span><span class="hidden-phone"> Settings</span></a></li>
             <li><a href="#" ng-click="logout($event)"><span class="icon-off"></span><span class="hidden-phone"> Logout</span></a></li>
           </ul>

docs-web/src/main/webapp/style/main.less

@@ -134,3 +134,7 @@ input[readonly].share-link {
     cursor: pointer;
 	}
 }
+
+.nav-text-error {
+  color: #b94a48 !important;
+}