Fetch the list of problems more frequently on the admin dashboard

app/assets/javascripts/admin/models/admin_dashboard.js

@@ -1,6 +1,23 @@
+/**
+  A model that stores all or some data that is displayed on the dashboard.
+
+  @class AdminDashboard
+  @extends Discourse.Model
+  @namespace Discourse
+  @module Discourse
+**/
+
 Discourse.AdminDashboard = Discourse.Model.extend({});
 
 Discourse.AdminDashboard.reopenClass({
+
+  /**
+    Fetch all dashboard data. This can be an expensive request when the cached data
+    has expired and the server must collect the data again.
+
+    @method find
+    @return {jqXHR} a jQuery Promise object
+  **/
   find: function() {
     var model = Discourse.AdminDashboard.create();
     return $.ajax(Discourse.getURL("/admin/dashboard"), {
@@ -11,5 +28,24 @@ Discourse.AdminDashboard.reopenClass({
         model.set('loaded', true);
       }
     });
+  },
+
+  /**
+    Only fetch the list of problems that should be rendered on the dashboard.
+    The model will only have its "problems" attribute set.
+
+    @method fetchProblems
+    @return {jqXHR} a jQuery Promise object
+  **/
+  fetchProblems: function() {
+    var model = Discourse.AdminDashboard.create();
+    return $.ajax(Discourse.getURL("/admin/dashboard/problems"), {
+      type: 'GET',
+      dataType: 'json',
+      success: function(json) {
+        model.mergeAttributes(json);
+        model.set('loaded', true);
+      }
+    });
   }
 });

app/assets/javascripts/admin/routes/admin_dashboard_route.js

@@ -19,6 +19,7 @@ Discourse.AdminDashboardRoute = Discourse.Route.extend({
   fetchDashboardData: function(c) {
     if( !c.get('dashboardFetchedAt') || Date.create('1 hour ago', 'en') > c.get('dashboardFetchedAt') ) {
       c.set('dashboardFetchedAt', new Date());
+      c.set('problemsFetchedAt', new Date());
       Discourse.AdminDashboard.find().then(function(d) {
         if( Discourse.SiteSettings.version_checks ){
           c.set('versionCheck', Discourse.VersionCheck.create(d.version_check));
@@ -31,6 +32,12 @@ Discourse.AdminDashboardRoute = Discourse.Route.extend({
         c.set('problems', d.problems);
         c.set('loading', false);
       });
+    } else if( !c.get('problemsFetchedAt') || Date.create('1 minute ago', 'en') > c.get('problemsFetchedAt') ) {
+      c.set('problemsFetchedAt', new Date());
+      Discourse.AdminDashboard.fetchProblems().then(function(d) {
+        c.set('problems', d.problems);
+        c.set('loading', false);
+      });
     }
   },