<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
declare(strict_types=1);

namespace Magento\Framework\GraphQl\Query;

use Magento\Framework\GraphQl\Config\Element\Enum;
use Magento\Framework\GraphQl\ConfigInterface;
use Magento\Framework\GraphQl\Schema\Type\Enum\DataMapperInterface;
use Magento\Framework\Phrase;

/**
* Processor that looks up definition data of an enum to lookup and convert data as it's specified in the schema.
*/
class EnumLookup
{
/**
* @var ConfigInterface
*/
private $typeConfig;

/**
* @var DataMapperInterface
*/
private $enumDataMapper;

/**
* @param ConfigInterface $typeConfig
* @param DataMapperInterface $enumDataMapper
*/
public function __construct(ConfigInterface $typeConfig, DataMapperInterface $enumDataMapper)
{
$this->typeConfig = $typeConfig;
$this->enumDataMapper = $enumDataMapper;
}

/**
* Convert a field value from a db query to an enum value declared as an item in the graphql schema
*
* @param string $enumName
* @param string $fieldValue
* @return string
* @throws \Magento\Framework\Exception\RuntimeException
*/
public function getEnumValueFromField(string $enumName, string $fieldValue) : string
{
$priceViewEnum = $this->typeConfig->getConfigElement($enumName);
if ($priceViewEnum instanceof Enum) {
foreach ($priceViewEnum->getValues() as $enumItem) {
$mappedValues = $this->enumDataMapper->getMappedEnums($enumName);
if (isset($mappedValues[$enumItem->getName()]) && $mappedValues[$enumItem->getName()] == $fieldValue) {
return $enumItem->getValue();
}
}
} else {
throw new \Magento\Framework\Exception\RuntimeException(
new Phrase('Enum type "%1" not defined', [$enumName])
);
}
return '';
}
}