Dump Symfony Constraints

ConstraintDumper.php

<?php

use Symfony\Component\Validator\Mapping\ClassMetadataInterface;
use Symfony\Component\Validator\Mapping\PropertyMetadata;
use Symfony\Component\Validator\Validator\ValidatorInterface;

class ConstraintDumper
{
    public function __construct(private readonly ValidatorInterface $validator)
    {
    }

    public function dump(string $class): array
    {
        /** @var ClassMetadataInterface $metadata */
        $metadata = $this->validator->getMetadataFor($class);

        $properties = [];
        foreach ($metadata->getConstrainedProperties() as $property) {
            $propertyConstraints = [];
            /** @var PropertyMetadata $propertyMetadata */
            foreach ($metadata->getPropertyMetadata($property) as $propertyMetadata) {
                $reflection = $propertyMetadata->getReflectionMember($class);
                $type = $reflection->getType();
                if (!$type instanceof ReflectionNamedType || $type->isBuiltin()) {
                    $propertyConstraints = array_merge($propertyConstraints, array_map($this->dumpConstraint(...), $propertyMetadata->getConstraints()));
                } else {
                    $propertyConstraints[] = $this->dump($type->getName());
                }
            }
            $properties[$property] = $propertyConstraints;
        }

        return [
            'class' => array_map($this->dumpConstraint(...), $metadata->getConstraints()),
            'properties' => $properties,
        ];
    }

    private function dumpConstraint(Constraint $constraint): array
    {
        return array_merge([
            'constraint' => get_class($constraint),
        ], get_object_vars($constraint));
    }
}

result.json

{
    "class": [],
    "properties": {
        "username": [
            {
                "constraint": "Symfony\\Component\\Validator\\Constraints\\NotBlank",
                "payload": null,
                "groups": [
                    "Default",
                    "CreateUserModel"
                ],
                "message": "This value should not be blank.",
                "allowNull": false,
                "normalizer": null
            }
        ],
        "email": [
            {
                "constraint": "Symfony\\Component\\Validator\\Constraints\\NotBlank",
                "payload": null,
                "groups": [
                    "Default",
                    "CreateUserModel"
                ],
                "message": "This value should not be blank.",
                "allowNull": false,
                "normalizer": null
            },
            {
                "constraint": "Symfony\\Component\\Validator\\Constraints\\Email",
                "payload": null,
                "groups": [
                    "Default",
                    "CreateUserModel"
                ],
                "message": "This value is not a valid email address.",
                "mode": null,
                "normalizer": null
            }
        ],
        "password": [
            {
                "constraint": "Symfony\\Component\\Validator\\Constraints\\NotBlank",
                "payload": null,
                "groups": [
                    "Default",
                    "CreateUserModel"
                ],
                "message": "This value should not be blank.",
                "allowNull": false,
                "normalizer": null
            }
        ],
        "age": [
            {
                "constraint": "Symfony\\Component\\Validator\\Constraints\\Range",
                "payload": null,
                "groups": [
                    "Default",
                    "CreateUserModel"
                ],
                "notInRangeMessage": "This value should be between {{ min }} and {{ max }}.",
                "minMessage": "This value should be {{ limit }} or more.",
                "maxMessage": "This value should be {{ limit }} or less.",
                "invalidMessage": "This value should be a valid number.",
                "invalidDateTimeMessage": "This value should be a valid datetime.",
                "min": 18,
                "minPropertyPath": null,
                "max": 150,
                "maxPropertyPath": null
            }
        ],
        "requisites": [
            {
                "class": [],
                "properties": {
                    "bik": [
                        {
                            "constraint": "Symfony\\Component\\Validator\\Constraints\\NotBlank",
                            "payload": null,
                            "groups": [
                                "Default",
                                "Requisites"
                            ],
                            "message": "This value should not be blank.",
                            "allowNull": false,
                            "normalizer": null
                        }
                    ],
                    "rs": [
                        {
                            "constraint": "Symfony\\Component\\Validator\\Constraints\\NotBlank",
                            "payload": null,
                            "groups": [
                                "Default",
                                "Requisites"
                            ],
                            "message": "This value should not be blank.",
                            "allowNull": false,
                            "normalizer": null
                        }
                    ]
                }
            }
        ]
    }
}