ScopeCodeResolver.php

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<?php
namespace Magento\Framework\App\Config;

use Magento\Framework\App\ScopeResolverPool;

class ScopeCodeResolver
{
    private $scopeResolverPool;

    private $resolvedScopeCodes = [];

    public function __construct(ScopeResolverPool $scopeResolverPool)
    {
        $this->scopeResolverPool = $scopeResolverPool;
    }

    public function resolve($scopeType, $scopeCode)
    {
        if (isset($this->resolvedScopeCodes[$scopeType][$scopeCode])) {
            return $this->resolvedScopeCodes[$scopeType][$scopeCode];
        }
        if (($scopeCode === null || is_numeric($scopeCode))
            && $scopeType !== ScopeConfigInterface::SCOPE_TYPE_DEFAULT
        ) {
            $scopeResolver = $this->scopeResolverPool->get($scopeType);
            $resolverScopeCode = $scopeResolver->getScope($scopeCode);
        } else {
            $resolverScopeCode = $scopeCode;
        }

        if ($resolverScopeCode instanceof \Magento\Framework\App\ScopeInterface) {
            $resolverScopeCode = $resolverScopeCode->getCode();
        }

        $this->resolvedScopeCodes[$scopeType][$scopeCode] = $resolverScopeCode;
        return $resolverScopeCode;
    }

    public function clean()
    {
        $this->resolvedScopeCodes = [];
    }
}