DbSelectorForm: allow to switch Director database

fixes #1498

application/controllers/DashboardController.php

@@ -4,6 +4,7 @@ namespace Icinga\Module\Director\Controllers;
 
 use Icinga\Module\Director\Dashboard\Dashboard;
 use Icinga\Module\Director\Web\Controller\ActionController;
+use Icinga\Module\Director\Web\Form\DbSelectorForm;
 
 class DashboardController extends ActionController
 {
@@ -11,6 +12,17 @@ class DashboardController extends ActionController
     {
     }
 
+    protected function addDbSelection()
+    {
+        $form = new DbSelectorForm($this->Window(), $this->listAllowedDbResourceNames());
+        $this->content()->add($form);
+        $form->handleRequest($this->getRequest());
+    }
+
+    /**
+     * @throws \Icinga\Exception\ConfigurationError
+     * @throws \Icinga\Exception\Http\HttpNotFoundException
+     */
     public function indexAction()
     {
         if ($this->getRequest()->isGet()) {
@@ -20,6 +32,9 @@ class DashboardController extends ActionController
         $mainDashboards = ['Objects', 'Alerts', 'Automation', 'Deployment', 'Data'];
         $this->setTitle($this->translate('Icinga Director - Main Dashboard'));
         $names = $this->params->getValues('name', $mainDashboards);
+        if (! $this->params->has('name')) {
+            $this->addDbSelection();
+        }
         if (count($names) === 1) {
             $name = $names[0];
             $dashboard = Dashboard::loadByName($name, $this->db());

doc/82-Changelog.md

@@ -24,6 +24,7 @@ before switching to a new version.
 * FEATURE: it's now possible to blacklist inherited or applied Services on
   single hosts (#907)
 * FEATURE: timestamped startup log rendering for upcoming Icinga v2.9.0 (#1478)
+* FEATURE: allow to switch between multiple Director databases (#1498)
 
 ### User Interface
 * FEATURE: Admins have now access to JSON download links in many places

library/Director/Web/Form/DbSelectorForm.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Form;
+
+use dipl\Html\Form;
+use Icinga\Web\Window;
+
+class DbSelectorForm extends Form
+{
+    protected $defaultAttributes = [
+        'class' => 'db-selector'
+    ];
+
+    protected $allowedNames;
+
+    /** @var Window */
+    protected $window;
+
+    public function __construct(Window $window, $allowedNames)
+    {
+        $this->window = $window;
+        $this->allowedNames = $allowedNames;
+    }
+
+    protected function assemble()
+    {
+        $this->addElement('db_resource', 'select', [
+            'options' => $this->allowedNames,
+            'class'   => 'autosubmit',
+            'value'   => $this->getSession()->get('db_resource')
+        ]);
+    }
+
+    public function onSuccess()
+    {
+        $this->getSession()->set('db_resource', $this->getValue('db_resource'));
+        $this->redirectOnSuccess();
+    }
+
+    /**
+     * @return \Icinga\Web\Session\SessionNamespace
+     */
+    protected function getSession()
+    {
+        return $this->window->getSessionNamespace('director');
+    }
+}