Implementation of the backend for the OAuth2 clients management

common/validators/MinecraftServerAddressValidator.php

@@ -0,0 +1,24 @@
+<?php
+declare(strict_types=1);
+
+namespace common\validators;
+
+use yii\validators\Validator;
+
+class MinecraftServerAddressValidator extends Validator {
+
+    protected function validateValue($value) {
+        // we will add minecraft protocol to help parse_url understand all another parts
+        $urlParts = parse_url('minecraft://' . $value);
+        $cnt = count($urlParts);
+        // scheme will be always presented, so we need to increase expected $cnt by 1
+        if (($cnt === 3 && isset($urlParts['host'], $urlParts['port']))
+         || ($cnt === 2 && isset($urlParts['host']))
+        ) {
+            return null;
+        }
+
+        return [$this->message, []];
+    }
+
+}