GroupController: Introduce addAction, editAction and removeAction

refs #8826

application/controllers/GroupController.php

@@ -7,6 +7,7 @@ use Icinga\Application\Config;
 use Icinga\Application\Logger;
 use Icinga\Authentication\UserGroup\UserGroupBackend;
 use Icinga\Authentication\UserGroup\UserGroupBackendInterface;
+use Icinga\Forms\Config\UserGroupForm;
 use Icinga\Web\Controller;
 use Icinga\Web\Form;
 use Icinga\Web\Notification;
@@ -100,6 +101,62 @@ class GroupController extends Controller
         );
     }
 
+    /**
+     * Add a group
+     */
+    public function addAction()
+    {
+        $form = new UserGroupForm();
+        $form->setRepository(
+            $this->getUserGroupBackend($this->params->getRequired('backend'), 'Icinga\Data\Extensible')
+        );
+        $form->add()->handleRequest();
+
+        $this->view->form = $form;
+        $this->render('form');
+    }
+
+    /**
+     * Edit a group
+     */
+    public function editAction()
+    {
+        $groupName = $this->params->getRequired('group');
+        $backend = $this->getUserGroupBackend($this->params->getRequired('backend'), 'Icinga\Data\Updatable');
+
+        $row = $backend->select(array('group_name'))->where('group_name', $groupName)->fetchRow();
+        if ($row === false) {
+            $this->httpNotFound(sprintf($this->translate('Group "%s" not found'), $groupName));
+        }
+
+        $form = new UserGroupForm();
+        $form->setRepository($backend);
+        $form->edit($groupName, get_object_vars($row))->handleRequest();
+
+        $this->view->form = $form;
+        $this->render('form');
+    }
+
+    /**
+     * Remove a group
+     */
+    public function removeAction()
+    {
+        $groupName = $this->params->getRequired('group');
+        $backend = $this->getUserGroupBackend($this->params->getRequired('backend'), 'Icinga\Data\Reducible');
+
+        if ($backend->select()->where('group_name', $groupName)->count() === 0) {
+            $this->httpNotFound(sprintf($this->translate('Group "%s" not found'), $groupName));
+        }
+
+        $form = new UserGroupForm();
+        $form->setRepository($backend);
+        $form->remove($groupName)->handleRequest();
+
+        $this->view->form = $form;
+        $this->render('form');
+    }
+
     /**
      * Return all user group backends implementing the given interface
      *

application/views/scripts/group/form.phtml

@@ -0,0 +1,6 @@
+<div class="controls">
+  <?= $tabs->showOnlyCloseButton(); ?>
+</div>
+<div class="content">
+  <?= $form; ?>
+</div>