CustomConditionProvider.php

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<?php
declare(strict_types=1);

namespace Magento\Framework\Api\SearchCriteria\CollectionProcessor\ConditionProcessor;

use Magento\Framework\Exception\InputException;
use Magento\Framework\Api\SearchCriteria\CollectionProcessor\ConditionProcessor\CustomConditionInterface;
use Magento\Framework\Phrase;

class CustomConditionProvider implements CustomConditionProviderInterface
{
    private $customConditionProcessors;

    public function __construct(array $customConditionProcessors = [])
    {
        foreach ($customConditionProcessors as $processor) {
            if (!$processor instanceof CustomConditionInterface) {
                throw new InputException(
                    new Phrase('Custom processor must implement "%1".', [CustomConditionInterface::class])
                );
            }
        }

        $this->customConditionProcessors = $customConditionProcessors;
    }

    public function getProcessorByField(string $fieldName): CustomConditionInterface
    {
        if (!$this->hasProcessorForField($fieldName)) {
            throw new InputException(
                new Phrase('Custom processor for field "%1" is absent.', [$fieldName])
            );
        }

        return $this->customConditionProcessors[$fieldName];
    }

    public function hasProcessorForField(string $fieldName): bool
    {
        return array_key_exists($fieldName, $this->customConditionProcessors);
    }
}