232 lines
7.9 KiB
PHP
232 lines
7.9 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace App\Validator\Constraints;
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use Countable;
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use DateTimeInterface;
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use Doctrine\ORM\EntityManagerInterface;
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use Doctrine\ORM\Mapping\ClassMetadata;
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use Iterator;
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use IteratorAggregate;
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use Symfony\Component\Validator\Constraint;
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use Symfony\Component\Validator\ConstraintValidator;
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use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
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use Symfony\Component\Validator\Exception\UnexpectedTypeException;
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use function count;
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use function get_class;
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use function is_array;
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use function is_object;
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use function is_string;
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/**
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* Unique Entity Validator checks if one or a set of fields contain unique values.
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*
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* @author Benjamin Eberlei <kontakt@beberlei.de>
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*/
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class UniqueEntityValidator extends ConstraintValidator
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{
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public function __construct(
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protected EntityManagerInterface $em
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) {
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}
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/**
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* @param mixed $value
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*
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* @throws UnexpectedTypeException
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* @throws ConstraintDefinitionException
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*/
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public function validate($value, Constraint $constraint): void
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{
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if (!$constraint instanceof UniqueEntity) {
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throw new UnexpectedTypeException($constraint, UniqueEntity::class);
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}
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if (!is_array($constraint->fields) && !is_string($constraint->fields)) {
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throw new UnexpectedTypeException($constraint->fields, 'array');
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}
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if (null !== $constraint->errorPath && !is_string($constraint->errorPath)) {
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throw new UnexpectedTypeException($constraint->errorPath, 'string or null');
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}
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$fields = (array)$constraint->fields;
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if (0 === count($fields)) {
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throw new ConstraintDefinitionException('At least one field has to be specified.');
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}
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if (null === $value) {
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return;
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}
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$class = $this->em->getClassMetadata((string)get_class($value));
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$criteria = [];
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$hasNullValue = false;
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foreach ($fields as $fieldName) {
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if (!$class->hasField($fieldName) && !$class->hasAssociation($fieldName)) {
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throw new ConstraintDefinitionException(
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sprintf(
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'The field "%s" is not mapped by Doctrine, so it cannot be validated for uniqueness.',
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$fieldName
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)
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);
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}
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$fieldValue = $class->reflFields[$fieldName]?->getValue($value);
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if (null === $fieldValue) {
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$hasNullValue = true;
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}
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if ($constraint->ignoreNull && null === $fieldValue) {
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continue;
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}
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$criteria[$fieldName] = $fieldValue;
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if (null !== $criteria[$fieldName] && $class->hasAssociation($fieldName)) {
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/* Ensure the Proxy is initialized before using reflection to
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* read its identifiers. This is necessary because the wrapped
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* getter methods in the Proxy are being bypassed.
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*/
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$this->em->initializeObject($criteria[$fieldName]);
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}
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}
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// validation doesn't fail if one of the fields is null and if null values should be ignored
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if ($hasNullValue && $constraint->ignoreNull) {
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return;
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}
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// skip validation if there are no criteria (this can happen when the
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// "ignoreNull" option is enabled and fields to be checked are null
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if (empty($criteria)) {
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return;
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}
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if (null !== $constraint->entityClass) {
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/* Retrieve repository from given entity name.
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* We ensure the retrieved repository can handle the entity
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* by checking the entity is the same, or subclass of the supported entity.
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*/
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$repository = $this->em->getRepository($constraint->entityClass);
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$supportedClass = $repository->getClassName();
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if (!$value instanceof $supportedClass) {
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throw new ConstraintDefinitionException(
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sprintf(
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'The "%s" entity repository does not support the "%s" entity. The entity should be '
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. 'an instance of or extend "%s".',
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$constraint->entityClass,
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$class->getName(),
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$supportedClass
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)
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);
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}
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} else {
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$repository = $this->em->getRepository(get_class($value));
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}
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$result = $repository->{$constraint->repositoryMethod}($criteria);
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if ($result instanceof IteratorAggregate) {
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$result = $result->getIterator();
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}
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/* If the result is a MongoCursor, it must be advanced to the first
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* element. Rewinding should have no ill effect if $result is another
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* iterator implementation.
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*/
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if ($result instanceof Iterator) {
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$result->rewind();
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if ($result instanceof Countable && 1 < count($result)) {
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$result = [$result->current(), $result->current()];
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} else {
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$result = $result->valid() && null !== $result->current() ? [$result->current()] : [];
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}
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} elseif (is_array($result)) {
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reset($result);
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} else {
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$result = null === $result ? [] : [$result];
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}
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/* If no entity matched the query criteria or a single entity matched,
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* which is the same as the entity being validated, the criteria is
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* unique.
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*/
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if (!$result || (1 === count($result) && current($result) === $value)) {
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return;
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}
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$errorPath = $constraint->errorPath ?? $fields[0];
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$invalidValue = $criteria[$errorPath] ?? $criteria[$fields[0]];
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$message = __('This value is already used.');
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$this->context->buildViolation($message)
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->atPath($errorPath)
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->setParameter('{{ value }}', $this->formatWithIdentifiers($class, $invalidValue))
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->setInvalidValue($invalidValue)
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->setCause($result)
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->addViolation();
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}
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private function formatWithIdentifiers(ClassMetadata $class, mixed $value): string
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{
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if (!is_object($value) || $value instanceof DateTimeInterface) {
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return $this->formatValue($value, self::PRETTY_DATE);
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}
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if (method_exists($value, '__toString')) {
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return (string)$value;
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}
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if ($class->getName() !== $idClass = get_class($value)) {
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// non unique value might be a composite PK that consists of other entity objects
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if ($this->em->getMetadataFactory()->hasMetadataFor($idClass)) {
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$identifiers = $this->em->getClassMetadata($idClass)->getIdentifierValues($value);
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} else {
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// this case might happen if the non unique column has a custom doctrine type and its value is an object
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// in which case we cannot get any identifiers for it
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$identifiers = [];
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}
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} else {
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$identifiers = $class->getIdentifierValues($value);
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}
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if (!$identifiers) {
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return sprintf('object("%s")', $idClass);
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}
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array_walk(
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$identifiers,
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function (&$id, $field): void {
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if (!is_object($id) || $id instanceof DateTimeInterface) {
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$idAsString = $this->formatValue($id, self::PRETTY_DATE);
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} else {
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$idAsString = sprintf('object("%s")', get_class($id));
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}
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$id = sprintf('%s => %s', $field, $idAsString);
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}
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);
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return sprintf('object("%s") identified by (%s)', $idClass, implode(', ', $identifiers));
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}
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}
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