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Filename : FallbackTrait.php
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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PleskRestApi\Symfony\Component\Intl\Data\Generator;

use PleskRestApi\Symfony\Component\Intl\Data\Bundle\Reader\BundleEntryReaderInterface;
use PleskRestApi\Symfony\Component\Intl\Locale;
/**
 * @author Roland Franssen <franssen.roland@gmail.com>
 *
 * @internal
 */
trait FallbackTrait
{
    private $fallbackCache = [];
    private $generatingFallback = \false;
    /**
     * @see AbstractDataGenerator::generateDataForLocale()
     */
    protected abstract function generateDataForLocale(BundleEntryReaderInterface $reader, string $tempDir, string $displayLocale) : ?array;
    /**
     * @see AbstractDataGenerator::generateDataForRoot()
     */
    protected abstract function generateDataForRoot(BundleEntryReaderInterface $reader, string $tempDir) : ?array;
    private function generateFallbackData(BundleEntryReaderInterface $reader, string $tempDir, string $displayLocale) : array
    {
        if (null === ($fallback = Locale::getFallback($displayLocale))) {
            return [];
        }
        if (isset($this->fallbackCache[$fallback])) {
            return $this->fallbackCache[$fallback];
        }
        $prevGeneratingFallback = $this->generatingFallback;
        $this->generatingFallback = \true;
        try {
            $data = 'root' === $fallback ? $this->generateDataForRoot($reader, $tempDir) : $this->generateDataForLocale($reader, $tempDir, $fallback);
        } finally {
            $this->generatingFallback = $prevGeneratingFallback;
        }
        return $this->fallbackCache[$fallback] = $data ?: [];
    }
}