Added application and project roles validation for API procedure calls

app/Api/Procedure/GroupProcedure.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace Kanboard\Api\Procedure;
+
+/**
+ * Group API controller
+ *
+ * @package  Kanboard\Api\Procedure
+ * @author   Frederic Guillot
+ */
+class GroupProcedure extends BaseProcedure
+{
+    public function createGroup($name, $external_id = '')
+    {
+        return $this->groupModel->create($name, $external_id);
+    }
+
+    public function updateGroup($group_id, $name = null, $external_id = null)
+    {
+        $values = array(
+            'id' => $group_id,
+            'name' => $name,
+            'external_id' => $external_id,
+        );
+
+        foreach ($values as $key => $value) {
+            if (is_null($value)) {
+                unset($values[$key]);
+            }
+        }
+
+        return $this->groupModel->update($values);
+    }
+
+    public function removeGroup($group_id)
+    {
+        return $this->groupModel->remove($group_id);
+    }
+
+    public function getGroup($group_id)
+    {
+        return $this->groupModel->getById($group_id);
+    }
+
+    public function getAllGroups()
+    {
+        return $this->groupModel->getAll();
+    }
+}