From 888df3933df7f3588de11085035d2d3ae9292fb0 Mon Sep 17 00:00:00 2001
From: Robin Appelman <icewind@owncloud.com>
Date: Tue, 10 Nov 2015 16:14:08 +0100
Subject: take the etag of child mounts into account for the folder etag

this replaces shared etag propagation
---
 lib/private/files/fileinfo.php | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

(limited to 'lib/private/files/fileinfo.php')

diff --git a/lib/private/files/fileinfo.php b/lib/private/files/fileinfo.php
index 2d2ef325d38..5b5e8697004 100644
--- a/lib/private/files/fileinfo.php
+++ b/lib/private/files/fileinfo.php
@@ -61,6 +61,11 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 */
 	private $owner;
 
+	/**
+	 * @var string[]
+	 */
+	private $childEtags = [];
+
 	/**
 	 * @param string|boolean $path
 	 * @param Storage\Storage $storage
@@ -93,6 +98,8 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	public function offsetGet($offset) {
 		if ($offset === 'type') {
 			return $this->getType();
+		} else if ($offset === 'etag') {
+			return $this->getEtag();
 		} elseif (isset($this->data[$offset])) {
 			return $this->data[$offset];
 		} else {
@@ -153,7 +160,12 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 * @return string
 	 */
 	public function getEtag() {
-		return $this->data['etag'];
+		if (count($this->childEtags) > 0) {
+			$combinedEtag = $this->data['etag'] . '::' . implode('::', $this->childEtags);
+			return md5($combinedEtag);
+		} else {
+			return $this->data['etag'];
+		}
 	}
 
 	/**
@@ -292,8 +304,19 @@ class FileInfo implements \OCP\Files\FileInfo, \ArrayAccess {
 	 * Sets the size, etag and size to for cross-storage childs
 	 *
 	 * @param array $data cache entry for the child
+	 * @param string $entryPath full path of the child entry
 	 */
-	public function addSubEntry($data) {
+	public function addSubEntry($data, $entryPath) {
 		$this->data['size'] += isset($data['size']) ? $data['size'] : 0;
+		if (isset($data['mtime'])) {
+			$this->data['mtime'] = max($this->data['mtime'], $data['mtime']);
+		}
+		if (isset($data['etag'])) {
+			// prefix the etag with the relative path of the subentry to propagate etag on mount moves
+			$relativeEntryPath = substr($entryPath, strlen($this->getPath()));
+			// attach the permissions to propagate etag on permision changes of submounts
+			$permissions = isset($data['permissions']) ? $data['permissions'] : 0;
+			$this->childEtags[] = $relativeEntryPath . '/' . $data['etag'] . $permissions;
+		}
 	}
 }
-- 
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