MAGETWO-64548: Fix backward incompatible changes for Scope/Validator class

Author: oshmyheliuk

lib/internal/Magento/Framework/App/Config/Scope/Validator.php

@@ -0,0 +1,92 @@
+<?php
+/**
+ * Copyright © 2013-2017 Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Framework\App\Config\Scope;
+
+use InvalidArgumentException;
+use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\App\Scope\ValidatorInterface;
+use Magento\Framework\App\ScopeResolverPool;
+use Magento\Framework\Exception\LocalizedException;
+use Magento\Framework\Exception\NoSuchEntityException;
+use Magento\Framework\Phrase;
+
+/**
+ * @deprecated Added in order to avoid backward compatibility because class was moved to another directory.
+ * @see \Magento\Framework\App\Scope\Validator
+ */
+class Validator implements ValidatorInterface
+{
+    /**
+     * @var ScopeResolverPool
+     */
+    private $scopeResolverPool;
+
+    /**
+     * @param ScopeResolverPool $scopeResolverPool
+     */
+    public function __construct(ScopeResolverPool $scopeResolverPool)
+    {
+        $this->scopeResolverPool = $scopeResolverPool;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isValid($scope, $scopeCode = null)
+    {
+        if ($scope === ScopeConfigInterface::SCOPE_TYPE_DEFAULT && empty($scopeCode)) {
+            return true;
+        }
+
+        if ($scope === ScopeConfigInterface::SCOPE_TYPE_DEFAULT && !empty($scopeCode)) {
+            throw new LocalizedException(new Phrase(
+                'The "%1" scope can\'t include a scope code. Try again without entering a scope code.',
+                [ScopeConfigInterface::SCOPE_TYPE_DEFAULT]
+            ));
+        }
+
+        if (empty($scope)) {
+            throw new LocalizedException(new Phrase('Enter a scope before proceeding.'));
+        }
+
+        $this->validateScopeCode($scopeCode);
+
+        try {
+            $scopeResolver = $this->scopeResolverPool->get($scope);
+            $scopeResolver->getScope($scopeCode)->getId();
+        } catch (InvalidArgumentException $e) {
+            throw new LocalizedException(new Phrase('The "%1" value doesn\'t exist. Enter another value.', [$scope]));
+        } catch (NoSuchEntityException $e) {
+            throw new LocalizedException(
+                new Phrase('The "%1" value doesn\'t exist. Enter another value.', [$scopeCode])
+            );
+        }
+
+        return true;
+    }
+
+    /**
+     * Validate scope code
+     * Throw exception if not valid.
+     *
+     * @param string $scopeCode
+     * @return void
+     * @throws LocalizedException if scope code is empty or has a wrong format
+     */
+    private function validateScopeCode($scopeCode)
+    {
+        if (empty($scopeCode)) {
+            throw new LocalizedException(new Phrase('Enter a scope code before proceeding.'));
+        }
+
+        if (!preg_match('/^[a-z]+[a-z0-9_]*$/', $scopeCode)) {
+            throw new LocalizedException(new Phrase(
+                'The scope code can include only lowercase letters (a-z), numbers (0-9) and underscores (_). '
+                . 'Also, the first character must be a letter.'
+            ));
+        }
+    }
+}