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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2026 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
namespace Fisharebest\Webtrees\Services;
use Fisharebest\Webtrees\Webtrees;
use InvalidArgumentException;
use function file_get_contents;
use function file_put_contents;
use function is_dir;
use function is_file;
use function is_link;
use function is_readable;
use function is_string;
use function realpath;
use function rmdir;
use function unlink;
/**
* Manage the site's online/offline status.
*/
readonly class MaintenanceModeService
{
private const string OFFLINE_FILE = 'offline.txt';
public function __construct(
private string $data_dir = Webtrees::DATA_DIR
) {
if (!is_dir($data_dir)) {
throw new InvalidArgumentException($data_dir . ' does not exist');
}
}
public function file(): string
{
// Remove any '/../' from the path.
return realpath($this->data_dir) . DIRECTORY_SEPARATOR . self::OFFLINE_FILE;
}
public function isOffline(): bool
{
$file = $this->file();
return is_file($file) || is_link($file) || is_dir($file);
}
public function message(): string
{
$file = $this->file();
if ($this->isOffline() && is_file($file) && is_readable($file)) {
$message = file_get_contents($file);
if (is_string($message)) {
return $message;
}
}
return '';
}
public function offline(string $message = ''): void
{
$this->online();
file_put_contents($this->file(), $message);
}
public function online(): void
{
$file = $this->file();
if (is_dir($file)) {
rmdir($file);
} elseif (is_link($file) || is_file($file)) {
unlink($file);
}
}
}
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