/**
* Resolve placeholders
*
* @param $string
* @param Blueprint|null $sourceBlueprint
* @param string $sourceType
* @param string $sourceKey
* @param int $circuitBreaker
* @return mixed
* @throws \Exception
*/
public function resolvePlaceholders($string, Blueprint $sourceBlueprint = null, $sourceType = null, $sourceKey = null, $circuitBreaker = 0)
{
if ($circuitBreaker > 20) {
throw new \Exception('Max nesting level reached. Looks like a circular dependency.');
}
$stageClasses = ['\\StackFormation\\ValueResolver\\Stage\\ProfileSwitcher', '\\StackFormation\\ValueResolver\\Stage\\EnvironmentVariable', '\\StackFormation\\ValueResolver\\Stage\\EnvironmentVariableWithFallback', '\\StackFormation\\ValueResolver\\Stage\\Variable', '\\StackFormation\\ValueResolver\\Stage\\ConditionalValue', '\\StackFormation\\ValueResolver\\Stage\\Tstamp', '\\StackFormation\\ValueResolver\\Stage\\Md5', '\\StackFormation\\ValueResolver\\Stage\\StackOutput', '\\StackFormation\\ValueResolver\\Stage\\StackResource', '\\StackFormation\\ValueResolver\\Stage\\StackParameter', '\\StackFormation\\ValueResolver\\Stage\\Clean'];
$pipeline = new Pipeline();
foreach ($stageClasses as $stageClass) {
$pipeline->addStage(new $stageClass($this, $sourceBlueprint, $sourceType, $sourceKey));
}
$originalString = $string;
$string = $pipeline->process($string);
return $string == $originalString ? $string : $this->resolvePlaceholders($string, $sourceBlueprint, $sourceType, $sourceKey, $circuitBreaker + 1);
}
