Add config tab to the module to manage the db resource

resolves #9486

application/controllers/SettingsController.php

@@ -0,0 +1,50 @@
+<?php
+
+use Icinga\Module\Director\ActionController;
+
+use Icinga\Forms\ConfigForm;
+use Icinga\Data\ResourceFactory;
+
+class Director_SettingsController extends ActionController
+{
+    public function indexAction()
+    {
+        $this->view->tabs = $this->Module()->getConfigTabs()->activate('config');
+
+        $resource = $this->Config()->get('db', 'resource');
+
+        $form = new ConfigForm();
+
+        $form->setIniConfig($this->Config('config'));
+        $form->addElement('select', 'resource', array(
+            'required'      => true,
+            'label'         => $this->translate('DB Resource'),
+            'multiOptions'  => $this->getResources(),
+            'value'         => $resource
+        ));
+        $form->setSubmitLabel($this->translate('Save'));
+
+        $form->setOnSuccess(function($form) {
+            /** @var $form ConfigForm */
+            $this->Config('config')->setSection('db', array(
+                'resource' => $form->getValue('resource')
+            ));
+            $form->save();
+        });
+
+        $form->handleRequest();
+
+        $this->view->form = $form;
+    }
+
+    public function getResources()
+    {
+        $resources = array();
+        foreach (ResourceFactory::getResourceConfigs() as $name => $resource) {
+            if ($resource->type === 'db') {
+                $resources['ido'][$name] = $name;
+            }
+        }
+        return $resources;
+    }
+}

application/views/scripts/settings/index.phtml

@@ -0,0 +1,7 @@
+<div class="controls">
+<?= $this->tabs ?>
+</div>
+
+<div class="content" data-base-target="_next">
+    <?= $form; ?>
+</div>

configuration.php

@@ -3,6 +3,11 @@
 // Sample permission:
 $this->providePermission('director/templates', 'Allow to modify templates');
 
+$this->provideConfigTab('config', array(
+    'title' => 'Configuration',
+    'url'   => 'settings'
+));
+
 $section = $this->menuSection(
     $this->translate('Icinga Director')
 )->setIcon('cubes');