Module.php: Allow modules to provide configurable navigation items

refs #5600

library/Icinga/Application/Modules/Module.php

@@ -221,6 +221,13 @@ class Module
      */
     protected $userGroupBackends = array();
 
+    /**
+     * This module's configurable navigation items
+     *
+     * @var array
+     */
+    protected $navigationItems = array();
+
     /**
      * Create a new module object
      *
@@ -875,6 +882,17 @@ class Module
         return $this->userGroupBackends;
     }
 
+    /**
+     * Return this module's configurable navigation items
+     *
+     * @return  array
+     */
+    public function getNavigationItems()
+    {
+        $this->launchConfigScript();
+        return $this->navigationItems;
+    }
+
     /**
      * Provide a named permission
      *
@@ -979,6 +997,19 @@ class Module
         return $this;
     }
 
+    /**
+     * Provide a new type of configurable navigation item
+     *
+     * @param   string  $type
+     *
+     * @return  $this
+     */
+    protected function provideNavigationItem($type)
+    {
+        $this->navigationItems[] = $type;
+        return $this;
+    }
+
     /**
      * Register module namespaces on our class loader
      *