[FrameworkBundle][Validator] Allow implementing validation groups pro…

…vider outside DTOs

CHANGELOG.md

@@ -15,6 +15,7 @@ CHANGELOG
  * Deprecate `ValidatorBuilder::enableAnnotationMapping()`, use `ValidatorBuilder::enableAttributeMapping()` instead
  * Deprecate `ValidatorBuilder::disableAnnotationMapping()`, use `ValidatorBuilder::disableAttributeMapping()` instead
  * Deprecate `AnnotationLoader`, use `AttributeLoader` instead
+ * Add `GroupProviderInterface` to implement validation group providers outside the underlying class
 
 6.3
 ---

Constraints/GroupSequenceProvider.php

@@ -11,16 +11,25 @@
 
 namespace Symfony\Component\Validator\Constraints;
 
+use Doctrine\Common\Annotations\Annotation\NamedArgumentConstructor;
+use Symfony\Component\Validator\Attribute\HasNamedArguments;
+
 /**
  * Attribute to define a group sequence provider.
  *
  * @Annotation
  *
+ * @NamedArgumentConstructor
+ *
  * @Target({"CLASS", "ANNOTATION"})
  *
  * @author Bernhard Schussek <bschussek@gmail.com>
  */
 #[\Attribute(\Attribute::TARGET_CLASS)]
 class GroupSequenceProvider
 {
+    #[HasNamedArguments]
+    public function __construct(public ?string $provider = null)
+    {
+    }
 }

GroupProviderInterface.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator;
+
+use Symfony\Component\Validator\Constraints\GroupSequence;
+
+/**
+ * Defines the interface for a validation group provider.
+ *
+ * @author Yonel Ceruto <yonelceruto@gmail.com>
+ */
+interface GroupProviderInterface
+{
+    /**
+     * Returns which validation groups should be used for a certain state
+     * of the object.
+     *
+     * @return string[]|string[][]|GroupSequence
+     */
+    public function getGroups(object $object): array|GroupSequence;
+}

Mapping/ClassMetadata.php

@@ -86,6 +86,13 @@ class ClassMetadata extends GenericMetadata implements ClassMetadataInterface
      */
     public bool $groupSequenceProvider = false;
 
+    /**
+     * @internal This property is public in order to reduce the size of the
+     *           class' serialized representation. Do not access it. Use
+     *           {@link getGroupProvider()} instead.
+     */
+    public ?string $groupProvider = null;
+
     /**
      * The strategy for traversing traversable objects.
      *
@@ -123,6 +130,7 @@ public function __sleep(): array
             'getters',
             'groupSequence',
             'groupSequenceProvider',
+            'groupProvider',
             'members',
             'name',
             'properties',
@@ -319,6 +327,7 @@ public function addGetterMethodConstraints(string $property, string $method, arr
     public function mergeConstraints(self $source)
     {
         if ($source->isGroupSequenceProvider()) {
+            $this->setGroupProvider($source->getGroupProvider());
             $this->setGroupSequenceProvider(true);
         }
 
@@ -432,7 +441,7 @@ public function setGroupSequenceProvider(bool $active)
             throw new GroupDefinitionException('Defining a group sequence provider is not allowed with a static group sequence.');
         }
 
-        if (!$this->getReflectionClass()->implementsInterface(GroupSequenceProviderInterface::class)) {
+        if (null === $this->groupProvider && !$this->getReflectionClass()->implementsInterface(GroupSequenceProviderInterface::class)) {
             throw new GroupDefinitionException(sprintf('Class "%s" must implement GroupSequenceProviderInterface.', $this->name));
         }
 
@@ -444,6 +453,16 @@ public function isGroupSequenceProvider(): bool
         return $this->groupSequenceProvider;
     }
 
+    public function setGroupProvider(?string $provider): void
+    {
+        $this->groupProvider = $provider;
+    }
+
+    public function getGroupProvider(): ?string
+    {
+        return $this->groupProvider;
+    }
+
     public function getCascadingStrategy(): int
     {
         return $this->cascadingStrategy;

Mapping/ClassMetadataInterface.php

@@ -30,6 +30,8 @@
  * @see GroupSequence
  * @see GroupSequenceProviderInterface
  * @see TraversalStrategy
+ *
+ * @method string|null getGroupProvider()
  */
 interface ClassMetadataInterface extends MetadataInterface
 {

Mapping/Loader/AnnotationLoader.php

@@ -51,6 +51,7 @@ public function loadClassMetadata(ClassMetadata $metadata): bool
             if ($constraint instanceof GroupSequence) {
                 $metadata->setGroupSequence($constraint->groups);
             } elseif ($constraint instanceof GroupSequenceProvider) {
+                $metadata->setGroupProvider($constraint->provider);
                 $metadata->setGroupSequenceProvider(true);
             } elseif ($constraint instanceof Constraint) {
                 $metadata->addConstraint($constraint);

Mapping/Loader/XmlFileLoader.php

@@ -201,6 +201,7 @@ private function loadClassesFromXml(): void
     private function loadClassMetadataFromXml(ClassMetadata $metadata, \SimpleXMLElement $classDescription): void
     {
         if (\count($classDescription->{'group-sequence-provider'}) > 0) {
+            $metadata->setGroupProvider($classDescription->{'group-sequence-provider'}[0]->value ?: null);
             $metadata->setGroupSequenceProvider(true);
         }
 

Mapping/Loader/YamlFileLoader.php

@@ -150,6 +150,9 @@ private function loadClassesFromYaml(): void
     private function loadClassMetadataFromYaml(ClassMetadata $metadata, array $classDescription): void
     {
         if (isset($classDescription['group_sequence_provider'])) {
+            if (\is_string($classDescription['group_sequence_provider'])) {
+                $metadata->setGroupProvider($classDescription['group_sequence_provider']);
+            }
             $metadata->setGroupSequenceProvider(
                 (bool) $classDescription['group_sequence_provider']
             );

Mapping/Loader/schema/dic/constraint-mapping/constraint-mapping-1.0.xsd

@@ -14,9 +14,9 @@
       validation constraints.
     ]]></xsd:documentation>
   </xsd:annotation>
-  
+
   <xsd:element name="constraint-mapping" type="constraint-mapping" />
-  
+
   <xsd:complexType name="constraint-mapping">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
@@ -28,7 +28,7 @@
       <xsd:element name="class" type="class" maxOccurs="unbounded" />
     </xsd:sequence>
   </xsd:complexType>
-  
+
   <xsd:complexType name="namespace">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
@@ -41,13 +41,13 @@
       </xsd:extension>
     </xsd:simpleContent>
   </xsd:complexType>
-  
+
   <xsd:complexType name="class">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
         Contains constraints for a single class.
-        
-        Nested elements may be class constraints, property and/or getter 
+
+        Nested elements may be class constraints, property and/or getter
         definitions.
       ]]></xsd:documentation>
     </xsd:annotation>
@@ -72,15 +72,18 @@
       <xsd:element name="value" type="value" minOccurs="1" maxOccurs="unbounded" />
     </xsd:sequence>
   </xsd:complexType>
-  
+
   <xsd:complexType name="group-sequence-provider">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
         Defines the name of the group sequence provider for a class.
       ]]></xsd:documentation>
     </xsd:annotation>
+    <xsd:sequence>
+      <xsd:element name="value" type="value" minOccurs="0" maxOccurs="unbounded" />
+    </xsd:sequence>
   </xsd:complexType>
-  
+
   <xsd:complexType name="property">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
@@ -93,7 +96,7 @@
     </xsd:sequence>
     <xsd:attribute name="name" type="xsd:string" use="required" />
   </xsd:complexType>
-  
+
   <xsd:complexType name="getter">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
@@ -106,14 +109,14 @@
     </xsd:sequence>
     <xsd:attribute name="property" type="xsd:string" use="required" />
   </xsd:complexType>
-  
+
   <xsd:complexType name="constraint" mixed="true">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
         Contains a constraint definition. The name of the constraint should be
         given in the "name" option.
-        
-        May contain a single value, multiple "constraint" elements, 
+
+        May contain a single value, multiple "constraint" elements,
         multiple "value" elements or multiple "option" elements.
       ]]></xsd:documentation>
     </xsd:annotation>
@@ -122,15 +125,15 @@
       <xsd:element name="option" type="option" minOccurs="1" maxOccurs="unbounded" />
       <xsd:element name="value" type="value" minOccurs="1" maxOccurs="unbounded" />
     </xsd:choice>
-    <xsd:attribute name="name" type="xsd:string" use="required" />    
+    <xsd:attribute name="name" type="xsd:string" use="required" />
   </xsd:complexType>
-  
+
   <xsd:complexType name="option" mixed="true">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
         Contains a constraint option definition. The name of the option
         should be given in the "name" option.
-        
+
         May contain a single value, multiple "value" elements or multiple
         "constraint" elements.
       ]]></xsd:documentation>
@@ -139,14 +142,14 @@
       <xsd:element name="constraint" type="constraint" minOccurs="1" maxOccurs="unbounded" />
       <xsd:element name="value" type="value" minOccurs="1" maxOccurs="unbounded" />
     </xsd:choice>
-    <xsd:attribute name="name" type="xsd:string" use="required" />  
+    <xsd:attribute name="name" type="xsd:string" use="required" />
   </xsd:complexType>
-  
+
   <xsd:complexType name="value" mixed="true">
     <xsd:annotation>
       <xsd:documentation><![CDATA[
         A value of an element.
-        
+
         May contain a single value, multiple "value" elements or multiple
         "constraint" elements.
       ]]></xsd:documentation>
@@ -155,6 +158,6 @@
       <xsd:element name="constraint" type="constraint" minOccurs="1" maxOccurs="unbounded" />
       <xsd:element name="value" type="value" minOccurs="1" maxOccurs="unbounded" />
     </xsd:choice>
-    <xsd:attribute name="key" type="xsd:string" use="optional" /> 
+    <xsd:attribute name="key" type="xsd:string" use="optional" />
   </xsd:complexType>
 </xsd:schema>

Tests/Constraints/GroupSequenceProviderTest.php

@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Tests\Constraints;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Validator\Constraints\GroupSequenceProvider;
+use Symfony\Component\Validator\Tests\Dummy\DummyGroupProvider;
+
+class GroupSequenceProviderTest extends TestCase
+{
+    public function testCreateAttributeStyle()
+    {
+        $sequence = new GroupSequenceProvider(provider: DummyGroupProvider::class);
+
+        $this->assertSame(DummyGroupProvider::class, $sequence->provider);
+    }
+}

Tests/Dummy/DummyGroupProvider.php

@@ -0,0 +1,23 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Tests\Dummy;
+
+use Symfony\Component\Validator\Constraints\GroupSequence;
+use Symfony\Component\Validator\GroupProviderInterface;
+
+class DummyGroupProvider implements GroupProviderInterface
+{
+    public function getGroups(object $object): array|GroupSequence
+    {
+        return ['foo', 'bar'];
+    }
+}

Tests/Fixtures/Attribute/GroupProviderDto.php

@@ -0,0 +1,22 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Tests\Fixtures\Attribute;
+
+use Symfony\Component\Validator\Constraints as Assert;
+use Symfony\Component\Validator\Tests\Dummy\DummyGroupProvider;
+
+#[Assert\GroupSequenceProvider(provider: DummyGroupProvider::class)]
+class GroupProviderDto
+{
+    public string $firstName = '';
+    public string $lastName = '';
+}

Tests/Mapping/Loader/XmlFileLoaderTest.php

@@ -24,6 +24,8 @@
 use Symfony\Component\Validator\Exception\MappingException;
 use Symfony\Component\Validator\Mapping\ClassMetadata;
 use Symfony\Component\Validator\Mapping\Loader\XmlFileLoader;
+use Symfony\Component\Validator\Tests\Dummy\DummyGroupProvider;
+use Symfony\Component\Validator\Tests\Fixtures\Attribute\GroupProviderDto;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintA;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintB;
 use Symfony\Component\Validator\Tests\Fixtures\ConstraintWithRequiredArgument;
@@ -126,6 +128,20 @@ public function testLoadGroupSequenceProvider()
         $this->assertEquals($expected, $metadata);
     }
 
+    public function testLoadGroupProvider()
+    {
+        $loader = new XmlFileLoader(__DIR__.'/constraint-mapping.xml');
+        $metadata = new ClassMetadata(GroupProviderDto::class);
+
+        $loader->loadClassMetadata($metadata);
+
+        $expected = new ClassMetadata(GroupProviderDto::class);
+        $expected->setGroupProvider(DummyGroupProvider::class);
+        $expected->setGroupSequenceProvider(true);
+
+        $this->assertEquals($expected, $metadata);
+    }
+
     public function testThrowExceptionIfDocTypeIsSet()
     {
         $loader = new XmlFileLoader(__DIR__.'/withdoctype.xml');