RegisterListenersChecker

libraries/src/Event/RegisterListenersCheckerInterface.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ * Joomla! Content Management System
+ *
+ * @copyright  (C) 2024 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license    GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\CMS\Event;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Provides a method to check whether the Subscriber (or event listener) should be registered.
+ *
+ * @since  __DEPLOY_VERSION__
+ */
+interface RegisterListenersCheckerInterface
+{
+    /**
+     * Check whether the Subscriber (or event listener) should be registered.
+     *
+     * @return bool
+     *
+     * @since  __DEPLOY_VERSION__
+     */
+    public function shouldRegisterListeners(): bool;
+}

libraries/src/Plugin/PluginHelper.php

@@ -10,6 +10,7 @@
 namespace Joomla\CMS\Plugin;
 
 use Joomla\CMS\Cache\Exception\CacheExceptionInterface;
+use Joomla\CMS\Event\RegisterListenersCheckerInterface;
 use Joomla\CMS\Factory;
 use Joomla\Event\DispatcherAwareInterface;
 use Joomla\Event\DispatcherInterface;
@@ -239,6 +240,12 @@ protected static function import($plugin, $autocreate = true, DispatcherInterfac
             return;
         }
 
+        // Check whether we should register the subscriber in current runtime
+        if ($plugin instanceof RegisterListenersCheckerInterface && !$plugin->shouldRegisterListeners()) {
+            dump($plugin);
+            return;
+        }
+
         $plugin->registerListeners();
     }