/**
* Pre-expands %placeholders% in string.
* @internal
*/
public static function preExpand($s, array $params, $check = array())
{
if (!is_string($s)) {
return $s;
}
$parts = preg_split('#%([\\w.-]*)%#i', $s, -1, PREG_SPLIT_DELIM_CAPTURE);
$res = '';
foreach ($parts as $n => $part) {
if ($n % 2 === 0) {
$res .= str_replace('%', '%%', $part);
} elseif ($part === '') {
$res .= '%%';
} elseif (isset($check[$part])) {
throw new Nette\InvalidArgumentException('Circular reference detected for variables: ' . implode(', ', array_keys($check)) . '.');
} else {
try {
$val = Nette\Utils\Arrays::get($params, explode('.', $part));
} catch (Nette\InvalidArgumentException $e) {
$res .= "%{$part}%";
continue;
}
$val = self::preExpand($val, $params, $check + array($part => 1));
if (strlen($part) + 2 === strlen($s)) {
if (is_array($val)) {
array_walk_recursive($val, function (&$val) use($params, $check, $part) {
$val = Configurator::preExpand($val, $params, $check + array($part => 1));
});
}
return $val;
}
if (!is_scalar($val)) {
throw new Nette\InvalidArgumentException("Unable to concatenate non-scalar parameter '{$part}' into '{$s}'.");
}
$res .= $val;
}
}
return $res;
}
