--- /dev/null
+<?php
+
+namespace Drupal\pathauto;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+use Drupal\Component\Plugin\FallbackPluginManagerInterface;
+
+/**
+ * Manages pathauto alias type plugins.
+ */
+class AliasTypeManager extends DefaultPluginManager implements FallbackPluginManagerInterface {
+
+ /**
+ * Constructs a new AliasType manager instance.
+ *
+ * @param \Traversable $namespaces
+ * An object that implements \Traversable which contains the root paths
+ * keyed by the corresponding namespace to look for plugin implementations.
+ * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+ * Cache backend instance to use.
+ * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+ * The module handler to invoke the alter hook with.
+ */
+ public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
+ parent::__construct('Plugin/pathauto/AliasType', $namespaces, $module_handler, 'Drupal\pathauto\AliasTypeInterface', 'Drupal\pathauto\Annotation\AliasType');
+ $this->alterInfo('pathauto_alias_types');
+ $this->setCacheBackend($cache_backend, 'pathauto_alias_types');
+ }
+
+ /**
+ * Returns plugin definitions that support a given token type.
+ *
+ * @param string $type
+ * The type of token plugin must support to be useful.
+ *
+ * @return array
+ * Plugin definitions.
+ */
+ public function getPluginDefinitionByType($type) {
+ $definitions = array_filter($this->getDefinitions(), function ($definition) use ($type) {
+ if (!empty($definition['types']) && in_array($type, $definition['types'])) {
+ return TRUE;
+ }
+ return FALSE;
+ });
+ return $definitions;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFallbackPluginId($plugin_id, array $configuration = array()) {
+ return 'broken';
+ }
+
+ /**
+ * Gets the definition of all visible plugins for this type.
+ *
+ * @return array
+ * An array of plugin definitions (empty array if no definitions were
+ * found). Keys are plugin IDs.
+ */
+ public function getVisibleDefinitions() {
+ $definitions = $this->getDefinitions();
+ unset($definitions['broken']);
+ return $definitions;
+ }
+
+}