Version 1

[yaffs-website] / web / core / lib / Drupal / Core / Plugin / Discovery / HookDiscovery.php

diff --git a/web/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php b/web/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php
new file mode 100644 (file)
index 0000000..51040cd
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+++ b/web/core/lib/Drupal/Core/Plugin/Discovery/HookDiscovery.php
@@ -0,0 +1,59 @@
+<?php
+
+namespace Drupal\Core\Plugin\Discovery;
+
+use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
+use Drupal\Component\Plugin\Discovery\DiscoveryTrait;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+
+/**
+ * Provides a hook-based plugin discovery class.
+ */
+class HookDiscovery implements DiscoveryInterface {
+
+  use DiscoveryTrait;
+
+  /**
+   * The name of the hook that will be implemented by this discovery instance.
+   *
+   * @var string
+   */
+  protected $hook;
+
+  /**
+   * The module handler used to find and execute the plugin hook.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
+   * Constructs a Drupal\Core\Plugin\Discovery\HookDiscovery object.
+   *
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   * @param string $hook
+   *   The Drupal hook that a module can implement in order to interface to
+   *   this discovery class.
+   */
+  public function __construct(ModuleHandlerInterface $module_handler, $hook) {
+    $this->moduleHandler = $module_handler;
+    $this->hook = $hook;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDefinitions() {
+    $definitions = [];
+    foreach ($this->moduleHandler->getImplementations($this->hook) as $module) {
+      $result = $this->moduleHandler->invoke($module, $this->hook);
+      foreach ($result as $plugin_id => $definition) {
+        $definition['provider'] = $module;
+        $definitions[$plugin_id] = $definition;
+      }
+    }
+    return $definitions;
+  }
+
+}