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<?php
declare(strict_types=1);
namespace Drupal\Core\DefaultContent;
use Drupal\Component\Graph\Graph;
use Drupal\Component\Serialization\Yaml;
use Drupal\Component\Utility\SortArray;
use Symfony\Component\Finder\Exception\DirectoryNotFoundException;
use Symfony\Component\Finder\Finder as SymfonyFinder;
/**
* Finds all default content in a directory, in dependency order.
*
* @internal
* This API is experimental.
*/
final class Finder {
/**
* The content entity data to import.
*
* The entities are in dependency order, keyed by entity UUID.
*
* @var array<string, array<mixed>>
*/
public readonly array $data;
public function __construct(string $path) {
try {
// Scan for all YAML files in the content directory.
$finder = SymfonyFinder::create()
->in($path)
->files()
->name('*.yml');
}
catch (DirectoryNotFoundException) {
$this->data = [];
return;
}
$graph = $files = [];
/** @var \Symfony\Component\Finder\SplFileInfo $file */
foreach ($finder as $file) {
/** @var array{_meta: array{uuid: string|null, depends: array<string, string>|null}} $decoded */
$decoded = Yaml::decode($file->getContents());
$decoded['_meta']['path'] = $file->getPathname();
$uuid = $decoded['_meta']['uuid'] ?? throw new ImportException($decoded['_meta']['path'] . ' does not have a UUID.');
$files[$uuid] = $decoded;
// For the graph to work correctly, every entity must be mentioned in it.
// This is inspired by
// \Drupal\Core\Config\Entity\ConfigDependencyManager::getGraph().
$graph += [
$uuid => [
'edges' => [],
'uuid' => $uuid,
],
];
foreach ($decoded['_meta']['depends'] ?? [] as $dependency_uuid => $entity_type) {
$graph[$dependency_uuid]['edges'][$uuid] = TRUE;
$graph[$dependency_uuid]['uuid'] = $dependency_uuid;
}
}
ksort($graph);
// Sort the dependency graph. The entities that are dependencies of other
// entities should come first.
$graph_object = new Graph($graph);
$sorted = $graph_object->searchAndSort();
uasort($sorted, SortArray::sortByWeightElement(...));
$entities = [];
foreach ($sorted as ['uuid' => $uuid]) {
if (array_key_exists($uuid, $files)) {
$entities[$uuid] = $files[$uuid];
}
}
$this->data = $entities;
}
}
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