class YamlDiscovery in Drupal 8

Allows YAML files to define plugin definitions.

If the value of a key (like title) in the definition is translatable then the addTranslatableProperty() method can be used to mark it as such and also to add translation context. Then \Drupal\Core\StringTranslation\TranslatableMarkup will be used to translate the string and also to mark it safe. Only strings written in the YAML files should be marked as safe, strings coming from dynamic plugin definitions potentially containing user input should not.

Hierarchy

• class \Drupal\Core\Plugin\Discovery\YamlDiscovery implements DiscoveryInterface uses DiscoveryTrait

9 files declare their use of YamlDiscovery

BreakpointManager.php in core/modules/breakpoint/src/BreakpointManager.php

ConfigMapperManager.php in core/modules/config_translation/src/ConfigMapperManager.php

ContextualLinkManager.php in core/lib/Drupal/Core/Menu/ContextualLinkManager.php

LinkRelationTypeManager.php in core/lib/Drupal/Core/Http/LinkRelationTypeManager.php

LocalActionManager.php in core/lib/Drupal/Core/Menu/LocalActionManager.php

... See full list

File

core/lib/Drupal/Core/Plugin/Discovery/YamlDiscovery.php, line 21

Namespace

Drupal\Core\Plugin\Discovery

class YamlDiscovery implements DiscoveryInterface {
  use DiscoveryTrait;

  /**
   * YAML file discovery and parsing handler.
   *
   * @var \Drupal\Core\Discovery\YamlDiscovery
   */
  protected $discovery;

  /**
   * Contains an array of translatable properties passed along to t().
   *
   * @see \Drupal\Core\Plugin\Discovery\YamlDiscovery::addTranslatableProperty()
   *
   * @var array
   */
  protected $translatableProperties = [];

  /**
   * Construct a YamlDiscovery object.
   *
   * @param string $name
   *   The file name suffix to use for discovery; for example, 'test' will
   *   become 'MODULE.test.yml'.
   * @param array $directories
   *   An array of directories to scan.
   */
  public function __construct($name, array $directories) {
    $this->discovery = new CoreYamlDiscovery($name, $directories);
  }

  /**
   * Set one of the YAML values as being translatable.
   *
   * @param string $value_key
   *   The key corresponding to the value in the YAML that contains a
   *   translatable string.
   * @param string $context_key
   *   (Optional) the translation context for the value specified by the
   *   $value_key.
   *
   * @return $this
   */
  public function addTranslatableProperty($value_key, $context_key = '') {
    $this->translatableProperties[$value_key] = $context_key;
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function getDefinitions() {
    $plugins = $this->discovery
      ->findAll();

    // Flatten definitions into what's expected from plugins.
    $definitions = [];
    foreach ($plugins as $provider => $list) {
      foreach ($list as $id => $definition) {

        // Add TranslatableMarkup.
        foreach ($this->translatableProperties as $property => $context_key) {
          if (isset($definition[$property])) {
            $options = [];

            // Move the t() context from the definition to the translation
            // wrapper.
            if ($context_key && isset($definition[$context_key])) {
              $options['context'] = $definition[$context_key];
              unset($definition[$context_key]);
            }
            $definition[$property] = new TranslatableMarkup($definition[$property], [], $options);
          }
        }

        // Add ID and provider.
        $definitions[$id] = $definition + [
          'provider' => $provider,
          'id' => $id,
        ];
      }
    }
    return $definitions;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DiscoveryTrait::doGetDefinition	protected	function	Gets a specific plugin definition.
DiscoveryTrait::getDefinition	public	function		3
DiscoveryTrait::hasDefinition	public	function
YamlDiscovery::$discovery	protected	property	YAML file discovery and parsing handler.
YamlDiscovery::$translatableProperties	protected	property	Contains an array of translatable properties passed along to t().
YamlDiscovery::addTranslatableProperty	public	function	Set one of the YAML values as being translatable.
YamlDiscovery::getDefinitions	public	function	Gets the definition of all plugins for this type. Overrides DiscoveryTrait::getDefinitions	1
YamlDiscovery::__construct	public	function	Construct a YamlDiscovery object.	2