From 66556eac0a59b9b7d32e0c1b7665a92624d6f848 Mon Sep 17 00:00:00 2001
From: Rafael Moraes <50295204+glomatico@users.noreply.github.com>
Date: Fri, 13 Sep 2024 21:20:20 -0300
Subject: [PATCH] update `update_playlist_file`

---
 gamdl/cli.py        | 18 ++++++++++++------
 gamdl/downloader.py | 15 +++++++++++++--
 2 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/gamdl/cli.py b/gamdl/cli.py
index 3ed81e3..42fd3d3 100644
--- a/gamdl/cli.py
+++ b/gamdl/cli.py
@@ -746,12 +746,18 @@ def main(
                     downloader.apply_tags(remuxed_path, tags, cover_url)
                     logger.debug(f'Moving to "{final_path}"')
                     downloader.move_to_output_path(remuxed_path, final_path)
-                    if save_playlist and download_queue.playlist_attributes:
-                        playlist_file_path = downloader.get_playlist_file_path(tags)
-                        logger.debug(
-                            f'Updating M3U8 playlist from "{playlist_file_path}"'
-                        )
-                        downloader.update_playlist_file(playlist_file_path, final_path)
+                if (
+                    not synced_lyrics_only
+                    and save_playlist
+                    and download_queue.playlist_attributes
+                ):
+                    playlist_file_path = downloader.get_playlist_file_path(tags)
+                    logger.debug(f'Updating M3U8 playlist from "{playlist_file_path}"')
+                    downloader.update_playlist_file(
+                        playlist_file_path,
+                        final_path,
+                        playlist_track,
+                    )
             except Exception as e:
                 error_count += 1
                 logger.error(
diff --git a/gamdl/downloader.py b/gamdl/downloader.py
index a527590..37a7f4e 100644
--- a/gamdl/downloader.py
+++ b/gamdl/downloader.py
@@ -283,6 +283,7 @@ class Downloader:
         self,
         playlist_file_path: Path,
         final_path: Path,
+        playlist_track: int,
     ):
         playlist_file_path.parent.mkdir(parents=True, exist_ok=True)
         playlist_file_path_parent_parts_len = len(playlist_file_path.parent.parts)
@@ -291,8 +292,18 @@ class Downloader:
             ("../" * (playlist_file_path_parent_parts_len - output_path_parts_len)),
             *final_path.parts[output_path_parts_len:],
         )
-        with playlist_file_path.open("a", encoding="utf8") as playlist_file:
-            playlist_file.write(final_path_relative.as_posix() + "\n")
+        playlist_file_lines = (
+            playlist_file_path.open("r", encoding="utf8").readlines()
+            if playlist_file_path.exists()
+            else []
+        )
+        if len(playlist_file_lines) < playlist_track:
+            playlist_file_lines.extend(
+                "\n" for _ in range(playlist_track - len(playlist_file_lines))
+            )
+        playlist_file_lines[playlist_track - 1] = final_path_relative.as_posix() + "\n"
+        with playlist_file_path.open("w", encoding="utf8") as playlist_file:
+            playlist_file.writelines(playlist_file_lines)
 
     @staticmethod
     def millis_to_min_sec(millis):