From 3da63f4148898ec4bc9544a4a9ef07bac3e07669 Mon Sep 17 00:00:00 2001
From: Louis Chemineau <louis@chmn.me>
Date: Thu, 15 Dec 2022 15:30:18 +0100
Subject: [PATCH] Use node's owner if no user is connected

Signed-off-by: Louis Chemineau <louis@chmn.me>
---
 .../lib/Listener/FileEventsListener.php       | 40 ++++++++++++-------
 1 file changed, 25 insertions(+), 15 deletions(-)

diff --git a/apps/files_versions/lib/Listener/FileEventsListener.php b/apps/files_versions/lib/Listener/FileEventsListener.php
index 98dbce17e96c5..20b3881e953a9 100644
--- a/apps/files_versions/lib/Listener/FileEventsListener.php
+++ b/apps/files_versions/lib/Listener/FileEventsListener.php
@@ -182,8 +182,7 @@ public function write_hook(Node $node): void {
 			return;
 		}
 
-		$userFolder = $this->rootFolder->getUserFolder(\OC_User::getUser());
-		$path = $userFolder->getRelativePath($node->getPath());
+		$path = $this->getPathForNode($node);
 		$result = Storage::store($path);
 
 		// Store the result of the version creation so it can be used in post_write_hook.
@@ -244,8 +243,7 @@ public function remove_hook(Node $node): void {
 			return;
 		}
 		$node = $this->versionsDeleted[$path];
-		$userFolder = $this->rootFolder->getUserFolder(\OC_User::getUser());
-		$relativePath = $userFolder->getRelativePath($node->getPath());
+		$relativePath = $this->getPathForNode($node);
 		unset($this->versionsDeleted[$path]);
 		Storage::delete($relativePath);
 		$this->versionsMapper->deleteAllVersionsForFileId($node->getId());
@@ -255,8 +253,7 @@ public function remove_hook(Node $node): void {
 	 * mark file as "deleted" so that we can clean up the versions if the file is gone
 	 */
 	public function pre_remove_hook(Node $node): void {
-		$userFolder = $this->rootFolder->getUserFolder(\OC_User::getUser());
-		$path = $userFolder->getRelativePath($node->getPath());
+		$path = $this->getPathForNode($node);
 		Storage::markDeletedFile($path);
 		$this->versionsDeleted[$node->getPath()] = $node;
 	}
@@ -268,9 +265,8 @@ public function pre_remove_hook(Node $node): void {
 	 * of the stored versions along the actual file
 	 */
 	public function rename_hook(Node $source, Node $target): void {
-		$userFolder = $this->rootFolder->getUserFolder(\OC_User::getUser());
-		$oldPath = $userFolder->getRelativePath($source->getPath());
-		$newPath = $userFolder->getRelativePath($target->getPath());
+		$oldPath = $this->getPathForNode($source);
+		$newPath = $this->getPathForNode($target);
 		Storage::renameOrCopy($oldPath, $newPath, 'rename');
 	}
 
@@ -281,9 +277,8 @@ public function rename_hook(Node $source, Node $target): void {
 	 * the stored versions to the new location
 	 */
 	public function copy_hook(Node $source, Node $target): void {
-		$userFolder = $this->rootFolder->getUserFolder(\OC_User::getUser());
-		$oldPath = $userFolder->getRelativePath($source->getPath());
-		$newPath = $userFolder->getRelativePath($target->getPath());
+		$oldPath = $this->getPathForNode($source);
+		$newPath = $this->getPathForNode($target);
 		Storage::renameOrCopy($oldPath, $newPath, 'copy');
 	}
 
@@ -297,9 +292,8 @@ public function copy_hook(Node $source, Node $target): void {
 	public function pre_renameOrCopy_hook(Node $source, Node $target): void {
 		// if we rename a movable mount point, then the versions don't have
 		// to be renamed
-		$userFolder = $this->rootFolder->getUserFolder(\OC_User::getUser());
-		$oldPath = $userFolder->getRelativePath($source->getPath());
-		$newPath = $userFolder->getRelativePath($target->getPath());
+		$oldPath = $this->getPathForNode($source);
+		$newPath = $this->getPathForNode($target);
 		$absOldPath = Filesystem::normalizePath('/' . \OC_User::getUser() . '/files' . $oldPath);
 		$manager = Filesystem::getMountManager();
 		$mount = $manager->find($absOldPath);
@@ -315,4 +309,20 @@ public function pre_renameOrCopy_hook(Node $source, Node $target): void {
 			Storage::setSourcePathAndUser($oldPath);
 		}
 	}
+
+	/**
+	 * Retrieve the path relative to the current user root folder.
+	 * If no user is connected, use the node's owner.
+	 */
+	private function getPathForNode(Node $node): ?string {
+		try {
+			return $this->rootFolder
+				->getUserFolder(\OC_User::getUser())
+				->getRelativePath($node->getPath());
+		} catch (\Throwable $ex) {
+			return $this->rootFolder
+				->getUserFolder($node->getOwner()->getUid())
+				->getRelativePath($node->getPath());
+		}
+	}
 }