libresign/lib/Helper/JavaHelper.php

<?php

declare(strict_types=1);
/**
 * SPDX-FileCopyrightText: 2025 LibreCode coop and contributors
 * SPDX-FileCopyrightText: 2023 Nextcloud GmbH <https://github.com/nextcloud/server>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace OCA\Libresign\Helper;

use OCA\Libresign\AppInfo\Application;
use OCP\IAppConfig;
use OCP\IL10N;
use Psr\Log\LoggerInterface;

class JavaHelper {
	private bool $isInitialized = false;
	public function __construct(
		protected IAppConfig $appConfig,
		protected IL10N $l10n,
		protected LoggerInterface $logger,
	) {
	}

	public function init(): void {
		if ($this->isInitialized) {
			return;
		}
		if ($this->isNonUTF8Locale()) {
			$locale = $this->l10n->getLocaleCode() . '.UTF-8';
			putenv('LANG=' . $locale);
			setlocale(LC_CTYPE, $locale, 'UTF-8');
			if ($this->isNonUTF8Locale()) {
				$this->logger->warning("JavaHelper: setlocale did not work properly after attempting locale '{$locale}'");
			}
		}
		$this->isInitialized = true;
	}

	/**
	 * Check if current locale is non-UTF8
	 *
	 * Based on: https://github.com/nextcloud/server/blob/cf1eed2769d928f4a7fe4543d51994331701f2d9/lib/private/legacy/OC_Util.php#L692-L705
	 *
	 * @return bool
	 */
	protected function isNonUTF8Locale(): bool {
		if (function_exists('escapeshellcmd')) {
			return escapeshellcmd('§') === '';
		}
		if (function_exists('escapeshellarg')) {
			return escapeshellarg('§') === '\'\'';
		}
		return preg_match('/utf-?8/i', setlocale(LC_CTYPE, 0)) === 0;
	}

	/**
	 * Returns the configured Java binary path.
	 * Initializes the environment if needed.
	 */
	public function getJavaPath(): string {
		if (!$this->isInitialized) {
			$this->init();
		}
		return $this->appConfig->getValueString(Application::APP_ID, 'java_path');
	}
}