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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Exception\ConstraintDefinitionException;

/**
 * @Annotation
 * @Target({"PROPERTY", "METHOD", "ANNOTATION"})
 *
 * @author Bernhard Schussek <[email protected]>
 */
#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
class Collection extends Composite
{
    public const MISSING_FIELD_ERROR = '2fa2158c-2a7f-484b-98aa-975522539ff8';
    public const NO_SUCH_FIELD_ERROR = '7703c766-b5d5-4cef-ace7-ae0dd82304e9';

    protected static $errorNames = [
        self::MISSING_FIELD_ERROR => 'MISSING_FIELD_ERROR',
        self::NO_SUCH_FIELD_ERROR => 'NO_SUCH_FIELD_ERROR',
    ];

    public $fields = [];
    public $allowExtraFields = false;
    public $allowMissingFields = false;
    public $extraFieldsMessage = 'This field was not expected.';
    public $missingFieldsMessage = 'This field is missing.';

    /**
     * {@inheritdoc}
     */
    public function __construct($fields = null, ?array $groups = null, $payload = null, ?bool $allowExtraFields = null, ?bool $allowMissingFields = null, ?string $extraFieldsMessage = null, ?string $missingFieldsMessage = null)
    {
        if (\is_array($fields) && ([] === $fields || ($firstField = reset($fields)) instanceof Constraint || ($firstField[0] ?? null) instanceof Constraint)) {
            $fields = ['fields' => $fields];
        }

        parent::__construct($fields, $groups, $payload);

        $this->allowExtraFields = $allowExtraFields ?? $this->allowExtraFields;
        $this->allowMissingFields = $allowMissingFields ?? $this->allowMissingFields;
        $this->extraFieldsMessage = $extraFieldsMessage ?? $this->extraFieldsMessage;
        $this->missingFieldsMessage = $missingFieldsMessage ?? $this->missingFieldsMessage;
    }

    /**
     * {@inheritdoc}
     */
    protected function initializeNestedConstraints()
    {
        parent::initializeNestedConstraints();

        if (!\is_array($this->fields)) {
            throw new ConstraintDefinitionException(sprintf('The option "fields" is expected to be an array in constraint "%s".', __CLASS__));
        }

        foreach ($this->fields as $fieldName => $field) {
            // the XmlFileLoader and YamlFileLoader pass the field Optional
            // and Required constraint as an array with exactly one element
            if (\is_array($field) && 1 == \count($field)) {
                $this->fields[$fieldName] = $field = $field[0];
            }

            if (!$field instanceof Optional && !$field instanceof Required) {
                $this->fields[$fieldName] = new Required($field);
            }
        }
    }

    public function getRequiredOptions()
    {
        return ['fields'];
    }

    protected function getCompositeOption()
    {
        return 'fields';
    }
}