Use factory to create Validator, reuse AnnotationReaderProvider

[MAILPOET-2437]

lib/Doctrine/Validator/ValidatorFactory.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace MailPoet\Doctrine\Validator;
+
+use MailPoet\Doctrine\Annotations\AnnotationReaderProvider;
+use MailPoet\Doctrine\MetadataCache;
+use MailPoetVendor\Symfony\Component\Validator\Mapping\Cache\DoctrineCache;
+use MailPoetVendor\Symfony\Component\Validator\Validation;
+
+class ValidatorFactory {
+  const METADATA_DIR = __DIR__ . '/../../../generated/validator-metadata';
+
+  /** @var AnnotationReaderProvider */
+  private $annotation_reader_provider;
+
+  function __construct(AnnotationReaderProvider $annotation_reader_provider) {
+    $this->annotation_reader_provider = $annotation_reader_provider;
+  }
+
+  function createValidator() {
+    $builder = Validation::createValidatorBuilder();
+
+    // annotation reader exists only in dev environment, on production cache is pre-generated
+    $annotation_reader = $this->annotation_reader_provider->getAnnotationReader();
+    if ($annotation_reader) {
+      $builder->enableAnnotationMapping($annotation_reader);
+    }
+
+    // metadata cache (for production cache is pre-generated at build time)
+    $is_read_only = !$annotation_reader;
+    $metadata_cache = new MetadataCache(self::METADATA_DIR, $is_read_only);
+    $builder->setMetadataCache(new DoctrineCache($metadata_cache));
+
+    return $builder->getValidator();
+  }
+}