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# This file is part of beets.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
import os
import tempfile
from collections.abc import Sequence
from pathlib import Path
import beets
from beets.dbcore.query import BLOB_TYPE, InQuery
from beets.util import path_as_posix
def is_m3u_file(path: str) -> bool:
return Path(path).suffix.lower() in {".m3u", ".m3u8"}
class PlaylistQuery(InQuery[bytes]):
"""Matches files listed by a playlist file."""
@property
def subvals(self) -> Sequence[BLOB_TYPE]:
return [BLOB_TYPE(p) for p in self.pattern]
def __init__(self, _, pattern: str, __):
config = beets.config["playlist"]
# Get the full path to the playlist
playlist_paths = (
pattern,
os.path.abspath(
os.path.join(
config["playlist_dir"].as_filename(),
f"{pattern}.m3u",
)
),
)
paths = []
for playlist_path in playlist_paths:
if not is_m3u_file(playlist_path):
# This is not am M3U playlist, skip this candidate
continue
try:
f = open(beets.util.syspath(playlist_path), mode="rb")
except OSError:
continue
if config["relative_to"].get() == "library":
relative_to = beets.config["directory"].as_filename()
elif config["relative_to"].get() == "playlist":
relative_to = os.path.dirname(playlist_path)
else:
relative_to = config["relative_to"].as_filename()
relative_to = beets.util.bytestring_path(relative_to)
for line in f:
if line[0] == "#":
# ignore comments, and extm3u extension
continue
paths.append(
beets.util.normpath(
os.path.join(relative_to, line.rstrip())
)
)
f.close()
break
super().__init__("path", paths)
class PlaylistPlugin(beets.plugins.BeetsPlugin):
item_queries = {"playlist": PlaylistQuery}
def __init__(self):
super().__init__()
self.config.add(
{
"auto": False,
"playlist_dir": ".",
"relative_to": "library",
"forward_slash": False,
}
)
self.playlist_dir = self.config["playlist_dir"].as_filename()
self.changes = {}
if self.config["relative_to"].get() == "library":
self.relative_to = beets.util.bytestring_path(
beets.config["directory"].as_filename()
)
elif self.config["relative_to"].get() != "playlist":
self.relative_to = beets.util.bytestring_path(
self.config["relative_to"].as_filename()
)
else:
self.relative_to = None
if self.config["auto"]:
self.register_listener("item_moved", self.item_moved)
self.register_listener("item_removed", self.item_removed)
self.register_listener("cli_exit", self.cli_exit)
def item_moved(self, item, source, destination):
self.changes[source] = destination
def item_removed(self, item):
if not os.path.exists(beets.util.syspath(item.path)):
self.changes[item.path] = None
def cli_exit(self, lib):
for playlist in self.find_playlists():
self._log.info("Updating playlist: {}", playlist)
base_dir = beets.util.bytestring_path(
self.relative_to
if self.relative_to
else os.path.dirname(playlist)
)
try:
self.update_playlist(playlist, base_dir)
except beets.util.FilesystemError:
self._log.error("Failed to update playlist: {}", playlist)
def find_playlists(self):
"""Find M3U playlists in the playlist directory."""
playlist_dir = beets.util.syspath(self.playlist_dir)
try:
dir_contents = os.listdir(playlist_dir)
except OSError:
self._log.warning(
"Unable to open playlist directory {.playlist_dir}", self
)
return
for filename in dir_contents:
if is_m3u_file(filename):
yield os.path.join(self.playlist_dir, filename)
def update_playlist(self, filename, base_dir):
"""Find M3U playlists in the specified directory."""
changes = 0
deletions = 0
with tempfile.NamedTemporaryFile(mode="w+b", delete=False) as tempfp:
new_playlist = tempfp.name
with open(filename, mode="rb") as fp:
for line in fp:
original_path = line.rstrip(b"\r\n")
# Ensure that path from playlist is absolute
is_relative = not os.path.isabs(line)
if is_relative:
lookup = os.path.join(base_dir, original_path)
else:
lookup = original_path
try:
new_path = self.changes[beets.util.normpath(lookup)]
except KeyError:
if self.config["forward_slash"]:
line = path_as_posix(line)
tempfp.write(line)
else:
if new_path is None:
# Item has been deleted
deletions += 1
continue
changes += 1
if is_relative:
new_path = os.path.relpath(new_path, base_dir)
line = line.replace(original_path, new_path)
if self.config["forward_slash"]:
line = path_as_posix(line)
tempfp.write(line)
if changes or deletions:
self._log.info(
"Updated playlist {} ({} changes, {} deletions)",
filename,
changes,
deletions,
)
beets.util.copy(new_playlist, filename, replace=True)
beets.util.remove(new_playlist)
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