Move custom libs to the source tree

libs/SimpleValidator/Validators/Base.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace SimpleValidator\Validators;
+
+abstract class Base
+{
+    protected $field = '';
+    protected $error_message = '';
+    protected $data = array();
+
+    abstract public function execute(array $data);
+
+    public function __construct($field, $error_message)
+    {
+        $this->field = $field;
+        $this->error_message = $error_message;
+    }
+
+    public function getErrorMessage()
+    {
+        return $this->error_message;
+    }
+
+    public function getField()
+    {
+        if (is_array($this->field)) {
+            return $this->field[0];
+        }
+
+        return $this->field;
+    }
+
+    public function isFieldNotEmpty(array $data)
+    {
+        return isset($data[$this->field]) && $data[$this->field] !== '';
+    }
+}