/**
* Validate the given token with the one in the token-file
*
* @param string $value The token to validate
* @param null $context The form context (ignored)
*
* @return bool
*/
public function isValid($value, $context = null)
{
try {
$file = new File($this->tokenPath);
$expectedToken = trim($file->fgets());
} catch (Exception $e) {
$msg = $e->getMessage();
$this->_error('TOKEN_FILE_ERROR', substr($msg, strpos($msg, ']: ') + 3));
return false;
}
if (empty($expectedToken)) {
$this->_error('TOKEN_FILE_EMPTY');
return false;
} elseif ($value !== $expectedToken) {
$this->_error('TOKEN_INVALID');
return false;
}
return true;
}
