From dc3a6a29bc5208c5a9690722bf238ff6ee7d9962 Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Fri, 29 Jul 2022 15:32:23 -0400
Subject: [PATCH] fix: #10783, do not purge files without a timestamp prefix

---
 src/posts/uploads.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/posts/uploads.js b/src/posts/uploads.js
index 9504752385..8033e8e66a 100644
--- a/src/posts/uploads.js
+++ b/src/posts/uploads.js
@@ -98,6 +98,10 @@ module.exports = function (Posts) {
 		let files = await fs.readdir(_getFullPath('/files'));
 		files = files.filter(filename => filename !== '.gitignore');
 
+		// Exclude non-timestamped files (e.g. group covers; see gh#10783/gh#10705)
+		const tsPrefix = /^\d{13}\-/;
+		files = files.filter(filename => tsPrefix.test(filename));
+
 		files = await Promise.all(files.map(async filename => (await Posts.uploads.isOrphan(`files/${filename}`) ? `files/${filename}` : null)));
 		files = files.filter(Boolean);