Allow to overwrite share target mountpoints

apps/files_sharing/lib/SharedMount.php

@@ -33,7 +33,9 @@
 use OC\Files\Mount\MountPoint;
 use OC\Files\Mount\MoveableMount;
 use OC\Files\View;
+use OCP\EventDispatcher\IEventDispatcher;
 use OCP\Files\Storage\IStorageFactory;
+use OCP\Share\Events\VerifyMountPointEvent;
 
 /**
  * Shared mount points can be moved by the user
@@ -91,6 +93,12 @@ private function verifyMountPoint(\OCP\Share\IShare $share, array $mountpoints,
 		$mountPoint = basename($share->getTarget());
 		$parent = dirname($share->getTarget());
 
+		$event = new VerifyMountPointEvent($share, $this->recipientView, $parent);
+		/** @var IEventDispatcher $dispatcher */
+		$dispatcher = \OC::$server->query(IEventDispatcher::class);
+		$dispatcher->dispatchTyped($event);
+		$parent = $event->getParent();
+
 		if ($folderExistCache->hasKey($parent)) {
 			$parentExists = $folderExistCache->get($parent);
 		} else {

lib/composer/composer/autoload_classmap.php

@@ -428,6 +428,7 @@
     'OCP\\Settings\\ISubAdminSettings' => $baseDir . '/lib/public/Settings/ISubAdminSettings.php',
     'OCP\\Share' => $baseDir . '/lib/public/Share.php',
     'OCP\\Share\\Events\\ShareCreatedEvent' => $baseDir . '/lib/public/Share/Events/ShareCreatedEvent.php',
+    'OCP\\Share\\Events\\VerifyMountPointEvent' => $baseDir . '/lib/public/Share/Events/VerifyMountPointEvent.php',
     'OCP\\Share\\Exceptions\\GenericShareException' => $baseDir . '/lib/public/Share/Exceptions/GenericShareException.php',
     'OCP\\Share\\Exceptions\\IllegalIDChangeException' => $baseDir . '/lib/public/Share/Exceptions/IllegalIDChangeException.php',
     'OCP\\Share\\Exceptions\\ShareNotFound' => $baseDir . '/lib/public/Share/Exceptions/ShareNotFound.php',

lib/composer/composer/autoload_static.php

@@ -457,6 +457,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\Settings\\ISubAdminSettings' => __DIR__ . '/../../..' . '/lib/public/Settings/ISubAdminSettings.php',
         'OCP\\Share' => __DIR__ . '/../../..' . '/lib/public/Share.php',
         'OCP\\Share\\Events\\ShareCreatedEvent' => __DIR__ . '/../../..' . '/lib/public/Share/Events/ShareCreatedEvent.php',
+        'OCP\\Share\\Events\\VerifyMountPointEvent' => __DIR__ . '/../../..' . '/lib/public/Share/Events/VerifyMountPointEvent.php',
         'OCP\\Share\\Exceptions\\GenericShareException' => __DIR__ . '/../../..' . '/lib/public/Share/Exceptions/GenericShareException.php',
         'OCP\\Share\\Exceptions\\IllegalIDChangeException' => __DIR__ . '/../../..' . '/lib/public/Share/Exceptions/IllegalIDChangeException.php',
         'OCP\\Share\\Exceptions\\ShareNotFound' => __DIR__ . '/../../..' . '/lib/public/Share/Exceptions/ShareNotFound.php',

lib/public/Share/Events/VerifyMountPointEvent.php

@@ -0,0 +1,83 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020, Joas Schilling <coding@schilljs.com>
+ *
+ * @author Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\Share\Events;
+
+use OC\Files\View;
+use OCP\EventDispatcher\Event;
+use OCP\Share\IShare;
+
+/**
+ * @since 19.0.0
+ */
+class VerifyMountPointEvent extends Event {
+
+	/** @var IShare */
+	private $share;
+	/** @var View */
+	private $view;
+	/** @var string */
+	private $parent;
+
+	/**
+	 * @since 19.0.0
+	 */
+	public function __construct(IShare $share,
+								View $view,
+								string $parent) {
+		parent::__construct();
+
+		$this->share = $share;
+		$this->view = $view;
+		$this->parent = $parent;
+	}
+
+	/**
+	 * @since 19.0.0
+	 */
+	public function getShare(): IShare {
+		return $this->share;
+	}
+
+	/**
+	 * @since 19.0.0
+	 */
+	public function getView(): View {
+		return $this->view;
+	}
+
+	/**
+	 * @since 19.0.0
+	 */
+	public function getParent(): string {
+		return $this->parent;
+	}
+
+	/**
+	 * @since 19.0.0
+	 */
+	public function setParent(string $parent): void {
+		$this->parent = $parent;
+	}
+}