/**
* Adds asset to collection.
*
* @param Asset $asset
* @return $this
*/
public function add(Asset $asset)
{
$this->_assets[$asset->getAlias()] = $asset;
return $this;
}
/**
* Resolves asset dependencies.
*
* @param Asset|null $asset
* @param Asset[] $resolved
* @param Asset[] $unresolved
* @return Asset[]
* @throws Exception
*/
protected function _resolveDependencies(Asset $asset, &$resolved = [], &$unresolved = [])
{
$unresolved[$asset->getAlias()] = $asset;
foreach ($asset->getDependencies() as $dependency) {
if (!Arr::key($dependency, $resolved)) {
if (isset($unresolved[$dependency])) {
throw new Exception(sprintf('Circular asset dependency "%s > %s" detected.', $asset->getAlias(), $dependency));
}
if ($dep = $this->_collection->get($dependency)) {
$this->_resolveDependencies($dep, $resolved, $unresolved);
}
}
}
$resolved[$asset->getAlias()] = $asset;
unset($unresolved[$asset->getAlias()]);
return $resolved;
}