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<?php
declare(strict_types=1);
namespace Dotenv\Repository\Adapter;
final class GuardedWriter implements WriterInterface
{
/**
* The inner writer to use.
*
* @var \Dotenv\Repository\Adapter\WriterInterface
*/
private $writer;
/**
* The variable name allow list.
*
* @var string[]
*/
private $allowList;
/**
* Create a new guarded writer instance.
*
* @param \Dotenv\Repository\Adapter\WriterInterface $writer
* @param string[] $allowList
*
* @return void
*/
public function __construct(WriterInterface $writer, array $allowList)
{
$this->writer = $writer;
$this->allowList = $allowList;
}
/**
* Write to an environment variable, if possible.
*
* @param non-empty-string $name
* @param string $value
*
* @return bool
*/
public function write(string $name, string $value)
{
// Don't set non-allowed variables
if (!$this->isAllowed($name)) {
return false;
}
// Set the value on the inner writer
return $this->writer->write($name, $value);
}
/**
* Delete an environment variable, if possible.
*
* @param non-empty-string $name
*
* @return bool
*/
public function delete(string $name)
{
// Don't clear non-allowed variables
if (!$this->isAllowed($name)) {
return false;
}
// Set the value on the inner writer
return $this->writer->delete($name);
}
/**
* Determine if the given variable is allowed.
*
* @param non-empty-string $name
*
* @return bool
*/
private function isAllowed(string $name)
{
return \in_array($name, $this->allowList, true);
}
}
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