diff --git a/src/Model/Entity/AppModel.php b/src/Model/Entity/AppModel.php
index 84c86b3..50bfe86 100644
--- a/src/Model/Entity/AppModel.php
+++ b/src/Model/Entity/AppModel.php
@@ -6,6 +6,28 @@ use Cake\ORM\Entity;
 
 class AppModel extends Entity
 {
+    const BROTLI_HEADER = "\xce\xb2\xcf\x81";
+    const BROTLI_MIN_LENGTH = 200;
+
+    const ACTION_ADD = 'add',
+        ACTION_EDIT = 'edit',
+        ACTION_SOFT_DELETE = 'soft_delete',
+        ACTION_DELETE = 'delete',
+        ACTION_UNDELETE = 'undelete',
+        ACTION_TAG = 'tag',
+        ACTION_TAG_LOCAL = 'tag_local',
+        ACTION_REMOVE_TAG = 'remove_tag',
+        ACTION_REMOVE_TAG_LOCAL = 'remove_local_tag',
+        ACTION_LOGIN = 'login',
+        ACTION_LOGIN_FAIL = 'login_fail',
+        ACTION_LOGOUT = 'logout';
+
+
+    public function getConstant($name)
+    {
+        return constant('self::' . $name);
+    }
+
     public function getAccessibleFieldForNew(): array
     {
         return $this->_accessibleOnNew ?? [];