From e5272e331f6579d21aa8b99850e1cac989b5c858 Mon Sep 17 00:00:00 2001
From: Ari Selseng <ari@selseng.net>
Date: Fri, 1 Mar 2019 23:52:58 +0100
Subject: [PATCH] Avoid calculating folder size for parent that also needs
 proper scan.

Signed-off-by: Ari Selseng <ari@selseng.net>
---
 lib/private/Files/Cache/Cache.php             | 30 +++++++++++++++++--
 lib/private/Files/Cache/Scanner.php           |  2 +-
 .../Files/Cache/Wrapper/CacheWrapper.php      |  4 +--
 3 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/lib/private/Files/Cache/Cache.php b/lib/private/Files/Cache/Cache.php
index 7b42cc2aa5704..fd26b94997993 100644
--- a/lib/private/Files/Cache/Cache.php
+++ b/lib/private/Files/Cache/Cache.php
@@ -3,6 +3,7 @@
  * @copyright Copyright (c) 2016, ownCloud, Inc.
  *
  * @author Andreas Fischer <bantu@owncloud.com>
+ * @author Ari Selseng <ari@selseng.net>
  * @author Artem Kochnev <MrJeos@gmail.com>
  * @author Björn Schießle <bjoern@schiessle.org>
  * @author Florin Peter <github@florin-peter.de>
@@ -774,15 +775,38 @@ public function searchByTag($tag, $userId) {
 	 * @param string|boolean $path
 	 * @param array $data (optional) meta data of the folder
 	 */
-	public function correctFolderSize($path, $data = null) {
+	public function correctFolderSize($path, $data = null, $isBackgroundScan = false) {
 		$this->calculateFolderSize($path, $data);
 		if ($path !== '') {
 			$parent = dirname($path);
 			if ($parent === '.' or $parent === '/') {
 				$parent = '';
 			}
-			$this->correctFolderSize($parent);
+			if ($isBackgroundScan) {
+				$parent_data = $this->get($parent);
+				if ($parent_data['size'] !== -1 && $this->getIncompleteChildrenCount($parent_data['fileid']) === 0) {
+					$this->correctFolderSize($parent, $parent_data, $isBackgroundScan);
+				}
+			} else {
+				$this->correctFolderSize($parent);
+			}
+		}
+	}
+
+	/**
+	 * get the incomplete count that shares parent $folder
+	 *
+	 * @param int $fileId the file id of the folder
+	 * @return int
+	 */
+	public function getIncompleteChildrenCount($fileId) {
+		if ($fileId > -1) {
+			$sql = 'SELECT count(*)
+					FROM `*PREFIX*filecache` WHERE `parent` = ? AND size = -1';
+			$result = $this->connection->executeQuery($sql, [$fileId]);
+			return (int)$result->fetchColumn();
 		}
+		return -1;
 	}
 
 	/**
@@ -919,4 +943,4 @@ public function normalize($path) {
 
 		return trim(\OC_Util::normalizeUnicode($path), '/');
 	}
-}
+}
\ No newline at end of file
diff --git a/lib/private/Files/Cache/Scanner.php b/lib/private/Files/Cache/Scanner.php
index ca9a0b794f99f..e684b8531035e 100644
--- a/lib/private/Files/Cache/Scanner.php
+++ b/lib/private/Files/Cache/Scanner.php
@@ -532,7 +532,7 @@ private function runBackgroundScanJob(callable $callback, $path) {
 			$callback();
 			\OC_Hook::emit('Scanner', 'correctFolderSize', array('path' => $path));
 			if ($this->cacheActive && $this->cache instanceof Cache) {
-				$this->cache->correctFolderSize($path);
+				$this->cache->correctFolderSize($path, null, true);
 			}
 		} catch (\OCP\Files\StorageInvalidException $e) {
 			// skip unavailable storages
diff --git a/lib/private/Files/Cache/Wrapper/CacheWrapper.php b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
index da0a1b54e7f74..223e678f323f8 100644
--- a/lib/private/Files/Cache/Wrapper/CacheWrapper.php
+++ b/lib/private/Files/Cache/Wrapper/CacheWrapper.php
@@ -258,9 +258,9 @@ public function searchByTag($tag, $userId) {
 	 * @param string|boolean $path
 	 * @param array $data (optional) meta data of the folder
 	 */
-	public function correctFolderSize($path, $data = null) {
+	public function correctFolderSize($path, $data = null, $isBackgroundScan = false) {
 		if ($this->getCache() instanceof Cache) {
-			$this->getCache()->correctFolderSize($path, $data);
+			$this->getCache()->correctFolderSize($path, $data, $isBackgroundScan);
 		}
 	}