From 1e686ba304dba057df2474d12dd7431ca7924f37 Mon Sep 17 00:00:00 2001
From: K1ndWha1e <nikita3561@gmail.com>
Date: Thu, 8 Oct 2026 20:50:49 +0300
Subject: [PATCH] =?UTF-8?q?*=D0=BF=D0=B5=D1=80=D0=B5=D0=B7=D0=B0=D0=BF?=
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 metadata/audiobook.v  |  9 +++++++++
 test/audiobook_test.v | 18 ++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/metadata/audiobook.v b/metadata/audiobook.v
index 61c6eed..3aca81b 100644
--- a/metadata/audiobook.v
+++ b/metadata/audiobook.v
@@ -564,6 +564,9 @@ fn write_book_tags_impl(path string, t BookTags, opts WriteOptions) ! {
 	parsed := parse_id3v2(path)!
 	tag := build_tag(parsed, t, opts)
 
+	// Владелец и права исходного файла: перезапись через временный файл иначе их потеряет
+	// (на NAS файлы библиотеки принадлежат пользователю приложения, а агент может работать от root)
+	orig := os.stat(path) or { os.Stat{} }
 	tmp_path := path + '.tagtmp'
 	mut src := os.open(path)!
 	mut dst := os.create(tmp_path)!
@@ -589,6 +592,12 @@ fn write_book_tags_impl(path string, t BookTags, opts WriteOptions) ! {
 	src.close()
 	dst.close()
 	ok = true
+	if orig.mode != 0 {
+		os.chmod(tmp_path, int(orig.mode & 0o7777)) or {}
+		$if !windows {
+			os.chown(tmp_path, int(orig.uid), int(orig.gid)) or {}
+		}
+	}
 	os.mv(tmp_path, path, overwrite: true)!
 }
 
diff --git a/test/audiobook_test.v b/test/audiobook_test.v
index df92458..57312cd 100644
--- a/test/audiobook_test.v
+++ b/test/audiobook_test.v
@@ -113,3 +113,21 @@ fn test_broken_tag_is_error() {
 	}
 	assert false, 'ошибка не возвращена'
 }
+
+// Права файла сохраняются после перезаписи
+fn test_write_keeps_mode() {
+	path := tmp_copy('test_id3v23.mp3')
+	defer {
+		os.rm(path) or {}
+	}
+	$if !windows {
+		os.chmod(path, 0o640) or { panic(err) }
+	}
+	before := os.stat(path) or { panic(err) }
+	metadata.write_book_tags(path, metadata.BookTags{
+		title: 'Права'
+	}) or { panic(err) }
+	after := os.stat(path) or { panic(err) }
+	assert after.mode & 0o777 == before.mode & 0o777
+	assert after.uid == before.uid
+}