menu: show health summary

configuration.php

@@ -24,7 +24,12 @@ $this->provideConfigTab('config', array(
 
 $section = $this->menuSection(
     $this->translate('Icinga Director')
-)->setIcon('cubes');
+)->setIcon(
+    'cubes'
+)->setRenderer(array(
+    'SummaryNavigationItemRenderer',
+    'state' => 'critical'
+));
 
 $section->add($this->translate('Overview'))->setUrl('director')->setPriority(20);
 $section->add($this->translate('Hosts'))->setUrl('director/hosts')->setPriority(30);
@@ -36,5 +41,6 @@ $section->add($this->translate('Import / Sync'))
     ->setPriority(901);
 $section->add($this->translate('Config'))
     ->setUrl('director/list/deploymentlog')
-    ->setPriority(902);
+    ->setPriority(902)
+    ->setRenderer('ConfigHealthItemRenderer');
 

library/Director/Web/Navigation/Renderer/ConfigHealthItemRenderer.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Navigation\Renderer;
+
+use Exception;
+use Icinga\Application\Config;
+use Icinga\Module\Director\ConfigHealthChecker;
+use Icinga\Module\Director\Db;
+use Icinga\Module\Director\KickstartHelper;
+use Icinga\Web\Navigation\Renderer\BadgeNavigationItemRenderer;
+
+class ConfigHealthItemRenderer extends BadgeNavigationItemRenderer
+{
+    private $db;
+
+    private $directorState = self::STATE_OK;
+
+    private $message;
+
+    private $count = 0;
+
+    protected function hasProblems()
+    {
+        $this->checkHealth();
+        return $this->count > 0;
+    }
+
+    public function getState()
+    {
+        return $this->directorState;
+    }
+
+    public function getCount()
+    {
+        if ($this->hasProblems()) {
+            return $this->count;
+        } else {
+            return 0;
+        }
+    }
+
+    public function getTitle()
+    {
+        return $this->message;
+    }
+
+    protected function checkHealth()
+    {
+        $db = $this->db();
+        if (! $db) {
+            $this->directorState = self::STATE_PENDING;
+            $this->count = 1;
+            $this->message = $this->translate(
+                'No database has been configured for Icinga Director'
+            );
+
+            return;
+        }
+
+        $kickstart = new KickstartHelper($db);
+        if ($kickstart->isRequired()) {
+            $this->directorState = self::STATE_PENDING;
+            $this->count = 1;
+            $this->message = $this->translate(
+                'No API user configured, you might run the kickstart helper'
+            );
+
+            return;
+        }
+
+        $pendingChanges = $db->countActivitiesSinceLastDeployedConfig();
+
+        if ($pendingChanges > 0) {
+            $this->directorState = self::STATE_WARNING;
+            $this->count = $pendingChanges;
+            $this->message = sprintf(
+                $this->translate(
+                    '%s config changes happend since the last deployed configuration'
+                ),
+                $pendingChanges
+            );
+
+            return;
+        }
+    }
+
+    protected function translate($message)
+    {
+        return mt('director', $message);
+    }
+
+    protected function db()
+    {
+        $resourceName = Config::module('director')->get('db', 'resource');
+        if ($resourceName) {
+            return Db::fromResourceName($resourceName);
+        } else {
+            return false;
+        }
+    }
+}