/**
* Resolve a parameter if it references other parameters.
*
* Works recursively.
*
* @param mixed $parameter Parameter value to be resolved.
* @return mixed
*/
public function resolve($parameter)
{
// allow for deep resolving
if (is_array($parameter)) {
foreach ($parameter as $key => $value) {
$parameter[$key] = $this->resolve($value);
}
return $parameter;
}
if (!is_string($parameter)) {
return $parameter;
}
// only bother with resolving when there are at least two %
$parameterLength = mb_strlen($parameter);
$firstDelimeter = strpos($parameter, '%');
$secondDelimeter = strpos($parameter, '%', min((int) $firstDelimeter + 1, $parameterLength));
if ($firstDelimeter === false || $secondDelimeter === false || $firstDelimeter === $secondDelimeter) {
return $parameter;
}
// special case when fully referencing another parameter, to avoid regex
// but also handle cases where referencing an array parameter
// (otherwise preg_replace_callback below will trigger array to string conversion)
if ($firstDelimeter === 0 && $secondDelimeter === $parameterLength - 1) {
$referenced = mb_substr($parameter, 1, -1);
return $this->container->hasParameter($referenced) ? $this->container->getParameter($referenced) : $parameter;
}
$container = $this->container;
$original = $parameter;
$parameter = preg_replace_callback('#(%%|%)([\\w\\d_\\.]+)%#i', function ($matches) use($container, $original) {
if ($matches[1] === '%%') {
return '%' . $matches[2];
}
$name = $matches[2];
if ($container->hasParameter($name)) {
$param = $container->getParameter($name);
// only scalar types can be referenced like that
if (!is_scalar($param)) {
throw new InvalidParameterException('Invalid parameter construction - cannot reference non-scalar type parameter in "' . $original . '".');
}
return $container->getParameter($name);
}
return '%' . $name . '%';
}, $parameter);
return $parameter;
}
public function testEscapingParameterSign()
{
$container = new Container();
$container->setParameter('lorem', 'ipsum');
$container->setParameter('dolor', 'sit.amet');
$container->setParameter('adipiscit.elit', '%lorem%%dolor%');
$container->setParameter('lipsum', '%%lorem%%');
$container->setParameter('lipsum.com', 'it.%dolor%%%lorem%%');
$this->assertEquals('ipsumsit.amet', $container->getParameter('adipiscit.elit'));
$this->assertEquals('%lorem%', $container->getParameter('lipsum'));
$this->assertEquals('it.sit.amet%lorem%', $container->getParameter('lipsum.com'));
}