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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Component\Discovery\YamlDiscovery. | |
| */ | |
| namespace Drupal\Component\Discovery; | |
| use Drupal\Component\Serialization\Yaml; | |
| use Drupal\Component\FileCache\FileCacheFactory; | |
| /** | |
| * Provides discovery for YAML files within a given set of directories. | |
| */ | |
| class YamlDiscovery implements DiscoverableInterface { | |
| /** | |
| * The base filename to look for in each directory. | |
| * | |
| * @var string | |
| */ | |
| protected $name; | |
| /** | |
| * An array of directories to scan, keyed by the provider. | |
| * | |
| * @var array | |
| */ | |
| protected $directories = array(); | |
| /** | |
| * Constructs a YamlDiscovery object. | |
| * | |
| * @param string $name | |
| * The base filename to look for in each directory. The format will be | |
| * $provider.$name.yml. | |
| * @param array $directories | |
| * An array of directories to scan, keyed by the provider. | |
| */ | |
| public function __construct($name, array $directories) { | |
| $this->name = $name; | |
| $this->directories = $directories; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function findAll() { | |
| $all = array(); | |
| $files = $this->findFiles(); | |
| $provider_by_files = array_flip($files); | |
| $file_cache = FileCacheFactory::get('yaml_discovery:' . $this->name); | |
| // Try to load from the file cache first. | |
| foreach ($file_cache->getMultiple($files) as $file => $data) { | |
| $all[$provider_by_files[$file]] = $data; | |
| unset($provider_by_files[$file]); | |
| } | |
| // If there are files left that were not returned from the cache, load and | |
| // parse them now. This list was flipped above and is keyed by filename. | |
| if ($provider_by_files) { | |
| foreach ($provider_by_files as $file => $provider) { | |
| // If a file is empty or its contents are commented out, return an empty | |
| // array instead of NULL for type consistency. | |
| $all[$provider] = Yaml::decode(file_get_contents($file)) ?: []; | |
| $file_cache->set($file, $all[$provider]); | |
| } | |
| } | |
| return $all; | |
| } | |
| /** | |
| * Returns an array of file paths, keyed by provider. | |
| * | |
| * @return array | |
| */ | |
| protected function findFiles() { | |
| $files = array(); | |
| foreach ($this->directories as $provider => $directory) { | |
| $file = $directory . '/' . $provider . '.' . $this->name . '.yml'; | |
| if (file_exists($file)) { | |
| $files[$provider] = $file; | |
| } | |
| } | |
| return $files; | |
| } | |
| } | |