Fire an event before a package is being uninstalled

Author: dtdesign

wcfsetup/install/files/lib/event/package/PackageUninstallationStarted.class.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace wcf\event\package;
+
+use wcf\data\package\Package;
+use wcf\event\IPsr14Event;
+
+/**
+ * Indicates that a package uninstallation has been started but no data has been
+ * removed so far.
+ *
+ * @author      Alexander Ebert
+ * @copyright   2001-2025 WoltLab GmbH
+ * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
+ * @since       6.2
+ */
+final class PackageUninstallationStarted implements IPsr14Event
+{
+    public function __construct(
+        public readonly Package $package
+    ) {}
+}

wcfsetup/install/files/lib/system/package/PackageUninstallationDispatcher.class.php

@@ -8,6 +8,8 @@
 use wcf\system\application\ApplicationHandler;
 use wcf\system\cache\builder\PackageCacheBuilder;
 use wcf\command\cache\ClearCache;
+use wcf\data\package\PackageCache;
+use wcf\event\package\PackageUninstallationStarted;
 use wcf\system\event\EventHandler;
 use wcf\system\package\plugin\IPackageInstallationPlugin;
 use wcf\system\setup\Uninstaller;
@@ -59,6 +61,11 @@ public function uninstall(string $node): PackageInstallationStep
             switch ($data['nodeType']) {
                 case 'start':
                     $step = $this->handleStartMarker($nodeData);
+
+                    $package = PackageCache::getInstance()->getPackage($this->queue->packageID);
+                    \assert($package !== null);
+                    $event = new PackageUninstallationStarted($package);
+                    EventHandler::getInstance()->fire($event);
                     break;
 
                 case 'package':