Menu: Integrate health endpoint

library/Icinga/Web/Menu.php

@@ -48,12 +48,20 @@ class Menu extends Navigation
                     'url'         => 'about',
                     'priority'    => 700
                 ],
+                'health' => [
+                    'icon'        => 'eye',
+                    'description' => t('Open health overview'),
+                    'label'       => t('Health'),
+                    'url'         => 'health',
+                    'priority'    => 710,
+                    'renderer'    => 'HealthNavigationRenderer'
+                ],
                 'announcements' => [
                     'icon'        => 'megaphone',
                     'description' => t('List announcements'),
                     'label'       => t('Announcements'),
                     'url'         => 'announcements',
-                    'priority'    => 710
+                    'priority'    => 720
                 ]
             ]
         ]);

library/Icinga/Web/Navigation/Renderer/HealthNavigationRenderer.php

@@ -0,0 +1,44 @@
+<?php
+/* Icinga Web 2 | (c) 2021 Icinga GmbH | GPLv2+ */
+
+namespace Icinga\Web\Navigation\Renderer;
+
+use Icinga\Application\Hook\HealthHook;
+
+class HealthNavigationRenderer extends BadgeNavigationItemRenderer
+{
+    public function getCount()
+    {
+        $count = 0;
+        $title = null;
+        $worstState = null;
+        foreach (HealthHook::collectHealthData()->select() as $result) {
+            if ($worstState === null || $result->state > $worstState) {
+                $worstState = $result->state;
+                $title = $result->message;
+                $count = 1;
+            } elseif ($worstState === $result->state) {
+                $count++;
+            }
+        }
+
+        switch ($worstState) {
+            case HealthHook::STATE_OK:
+                $count = 0;
+                break;
+            case HealthHook::STATE_WARNING:
+                $this->state = self::STATE_WARNING;
+                break;
+            case HealthHook::STATE_CRITICAL:
+                $this->state = self::STATE_CRITICAL;
+                break;
+            case HealthHook::STATE_UNKNOWN:
+                $this->state = self::STATE_UNKNOWN;
+                break;
+        }
+
+        $this->title = $title;
+
+        return $count;
+    }
+}