Improve group controllers and views

app/Controller/GroupModificationController.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Kanboard\Controller;
+
+/**
+ * Class GroupModificationController
+ *
+ * @package Kanboard\Controller
+ * @author  Frederic Guillot
+ */
+class GroupModificationController extends BaseController
+{
+    /**
+     * Display a form to update a group
+     *
+     * @access public
+     * @param array $values
+     * @param array $errors
+     */
+    public function show(array $values = array(), array $errors = array())
+    {
+        if (empty($values)) {
+            $values = $this->group->getById($this->request->getIntegerParam('group_id'));
+        }
+
+        $this->response->html($this->template->render('group_modification/show', array(
+            'errors' => $errors,
+            'values' => $values,
+        )));
+    }
+
+    /**
+     * Validate and save a group
+     *
+     * @access public
+     */
+    public function save()
+    {
+        $values = $this->request->getValues();
+        list($valid, $errors) = $this->groupValidator->validateModification($values);
+
+        if ($valid) {
+            if ($this->group->update($values) !== false) {
+                $this->flash->success(t('Group updated successfully.'));
+                return $this->response->redirect($this->helper->url->to('GroupListController', 'index'), true);
+            } else {
+                $this->flash->failure(t('Unable to update your group.'));
+            }
+        }
+
+        return $this->show($values, $errors);
+    }
+}