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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; | |
} | |
} | |