Move custom libs to the source tree

libs/SimpleValidator/Validators/Equals.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace SimpleValidator\Validators;
+
+class Equals extends Base
+{
+    private $field2;
+
+    public function __construct($field1, $field2, $error_message)
+    {
+        parent::__construct($field1, $error_message);
+        $this->field2 = $field2;
+    }
+
+    public function execute(array $data)
+    {
+        if ($this->isFieldNotEmpty($data)) {
+            if (! isset($data[$this->field2])) {
+                return false;
+            }
+
+            return $data[$this->field] === $data[$this->field2];
+        }
+
+        return true;
+    }
+}