From f622cc74218d6ed5bc7910eacfcc260314a400f3 Mon Sep 17 00:00:00 2001
From: Michael Klein <michael@fossekall.de>
Date: Sat, 16 Mar 2024 20:45:27 +0100
Subject: [PATCH] autotagger: match file name if the file has no title metadata

---
 beets/autotag/match.py | 4 +++-
 docs/changelog.rst     | 1 +
 test/test_autotag.py   | 8 ++++++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/beets/autotag/match.py b/beets/autotag/match.py
index 331a57596e..0460245e9d 100644
--- a/beets/autotag/match.py
+++ b/beets/autotag/match.py
@@ -19,6 +19,7 @@
 from __future__ import annotations
 
 import datetime
+import os
 import re
 from enum import IntEnum
 from typing import (
@@ -190,7 +191,8 @@ def track_distance(
         dist.add_ratio("track_length", diff, track_length_max)
 
     # Title.
-    dist.add_string("track_title", item.title, track_info.title)
+    cur_title = item.title or os.fsdecode(os.path.basename(item.path))
+    dist.add_string("track_title", cur_title, track_info.title)
 
     # Artist. Only check if there is actually an artist in the track data.
     if (
diff --git a/docs/changelog.rst b/docs/changelog.rst
index a9ed03e422..0393102853 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -23,6 +23,7 @@ New features:
 * Beets now uses ``platformdirs`` to determine the default music directory.
   This location varies between systems -- for example, users can configure it
   on Unix systems via ``user-dirs.dirs(5)``.
+* The autotagger matches the file name if the track has no ``title`` metadata.
 
 Bug fixes:
 
diff --git a/test/test_autotag.py b/test/test_autotag.py
index 6e362f2f4b..cdff8f2cb7 100644
--- a/test/test_autotag.py
+++ b/test/test_autotag.py
@@ -354,6 +354,14 @@ def test_various_artists_tolerated(self):
         dist = match.track_distance(item, info, incl_artist=True)
         assert dist == 0.0
 
+    def test_missing_metadata(self):
+        item = _make_item("", 0)
+        info = _make_trackinfo()[0]
+        dist1 = match.track_distance(item, info)
+        item.path = b"/tmp/01 One.mp3"
+        dist2 = match.track_distance(item, info)
+        assert dist2 < dist1
+
 
 class AlbumDistanceTest(BeetsTestCase):
     def _mapping(self, items, info):