show/activitylog: add restore action

application/controllers/ShowController.php

@@ -11,6 +11,8 @@ class ShowController extends ActionController
 {
     protected $defaultTab;
 
+    protected $oldObject;
+
     protected function activityTabs($entry)
     {
         $tabs = $this->getTabs();
@@ -87,7 +89,14 @@ class ShowController extends ActionController
 
     protected function oldObject($entry)
     {
-        return $this->createObject($entry->object_type, $entry->old_properties);
+        if ($this->oldObject === null) {
+            $this->oldObject = $this->createObject(
+                $entry->object_type,
+                $entry->old_properties
+            );
+        }
+
+        return $this->oldObject;
     }
 
     protected function newObject($entry)
@@ -167,6 +176,15 @@ class ShowController extends ActionController
         );
 
         $entry = $v->entry;
+
+        if ($entry->old_properties) {
+            $this->view->form = $this
+                ->loadForm('restoreObject')
+                ->setDb($this->db())
+                ->setObject($this->oldObject($entry))
+                ->handleRequest();
+        }
+
         $this->activityTabs($entry);
         $this->showInfo($entry);
         $func = 'show' . ucfirst($this->params->get('show', $this->defaultTab));

application/forms/RestoreObjectForm.php

@@ -0,0 +1,56 @@
+<?php
+
+// TODO: Check whether this can be removed
+namespace Icinga\Module\Director\Forms;
+
+use Icinga\Module\Director\Db;
+use Icinga\Module\Director\Objects\IcingaObject;
+use Icinga\Module\Director\Web\Form\QuickForm;
+
+class RestoreObjectForm extends QuickForm
+{
+    protected $db;
+
+    protected $object;
+
+    public function setup()
+    {
+        $this->submitLabel = $this->translate('Restore former object');
+    }
+
+    protected function addSubmitButtonIfSet()
+    {
+        $res = parent::addSubmitButtonIfSet();
+        $this->getDisplayGroup('buttons')->setDecorators(array('FormElements'));
+        return $res;
+    }
+
+    public function onSuccess()
+    {
+        $object = $this->object;
+        $name = $object->object_name;
+        $db = $this->db;
+        $msg = $this->translate('Object has been restored');
+
+        // TODO: service -> multi-key
+        if ($object::exists($name, $db)) {
+            $object::load($name, $db)->replaceWith($object)->store();
+        } else {
+            $object->store($db);
+        }
+
+        $this->redirectOnSuccess($msg);
+    }
+
+    public function setDb($db)
+    {
+        $this->db = $db;
+        return $this;
+    }
+
+    public function setObject(IcingaObject $object)
+    {
+        $this->object = $object;
+        return $this;
+    }
+}

application/views/scripts/show/activitylog.phtml

@@ -62,6 +62,12 @@ $url = $this->url()->without('checksum')->without('show');
     <th><?= $this->translate('Checksum') ?></th>
     <td><?= $this->entry->checksum ?></td>
   </tr>
+<?php if ($this->form): ?>
+  <tr>
+    <th><?= $this->translate('Actions') ?></th>
+    <td><?= $this->form ?></td>
+  </tr>
+<?php endif ?>
 </table>
 <?php if (! empty($this->output)): ?>
 <h1><?= $this->escape($this->title) ?></h1>