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689 lines
27 KiB
Python
689 lines
27 KiB
Python
# This file is part of beets.
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# Copyright 2016, Adrian Sampson.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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"""Adds Discogs album search support to the autotagger. Requires the
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python3-discogs-client library.
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"""
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from __future__ import annotations
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import http.client
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import json
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import os
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import re
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import socket
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import time
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import traceback
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from functools import cache
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from string import ascii_lowercase
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from typing import TYPE_CHECKING, Sequence
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import confuse
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from discogs_client import Client, Master, Release
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from discogs_client.exceptions import DiscogsAPIError
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from requests.exceptions import ConnectionError
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from typing_extensions import TypedDict
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import beets
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import beets.ui
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from beets import config
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from beets.autotag.distance import string_dist
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from beets.autotag.hooks import AlbumInfo, TrackInfo
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from beets.metadata_plugins import MetadataSourcePlugin
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if TYPE_CHECKING:
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from collections.abc import Callable, Iterable
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from beets.library import Item
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USER_AGENT = f"beets/{beets.__version__} +https://beets.io/"
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API_KEY = "rAzVUQYRaoFjeBjyWuWZ"
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API_SECRET = "plxtUTqoCzwxZpqdPysCwGuBSmZNdZVy"
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# Exceptions that discogs_client should really handle but does not.
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CONNECTION_ERRORS = (
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ConnectionError,
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socket.error,
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http.client.HTTPException,
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ValueError, # JSON decoding raises a ValueError.
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DiscogsAPIError,
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)
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TRACK_INDEX_RE = re.compile(
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r"""
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(.*?) # medium: everything before medium_index.
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(\d*?) # medium_index: a number at the end of
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# `position`, except if followed by a subtrack index.
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# subtrack_index: can only be matched if medium
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# or medium_index have been matched, and can be
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(
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(?<=\w)\.[\w]+ # a dot followed by a string (A.1, 2.A)
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| (?<=\d)[A-Z]+ # a string that follows a number (1A, B2a)
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)?
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""",
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re.VERBOSE,
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)
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DISAMBIGUATION_RE = re.compile(r" \(\d+\)")
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class ReleaseFormat(TypedDict):
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name: str
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qty: int
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descriptions: list[str] | None
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class DiscogsPlugin(MetadataSourcePlugin):
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def __init__(self):
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super().__init__()
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self.config.add(
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{
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"apikey": API_KEY,
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"apisecret": API_SECRET,
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"tokenfile": "discogs_token.json",
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"source_weight": 0.5,
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"user_token": "",
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"separator": ", ",
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"index_tracks": False,
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"append_style_genre": False,
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"strip_disambiguation": True,
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}
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)
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self.config["apikey"].redact = True
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self.config["apisecret"].redact = True
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self.config["user_token"].redact = True
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self.setup()
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def setup(self, session=None):
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"""Create the `discogs_client` field. Authenticate if necessary."""
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c_key = self.config["apikey"].as_str()
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c_secret = self.config["apisecret"].as_str()
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# Try using a configured user token (bypassing OAuth login).
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user_token = self.config["user_token"].as_str()
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if user_token:
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# The rate limit for authenticated users goes up to 60
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# requests per minute.
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self.discogs_client = Client(USER_AGENT, user_token=user_token)
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return
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# Get the OAuth token from a file or log in.
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try:
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with open(self._tokenfile()) as f:
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tokendata = json.load(f)
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except OSError:
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# No token yet. Generate one.
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token, secret = self.authenticate(c_key, c_secret)
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else:
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token = tokendata["token"]
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secret = tokendata["secret"]
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self.discogs_client = Client(USER_AGENT, c_key, c_secret, token, secret)
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def reset_auth(self):
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"""Delete token file & redo the auth steps."""
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os.remove(self._tokenfile())
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self.setup()
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def _tokenfile(self):
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"""Get the path to the JSON file for storing the OAuth token."""
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return self.config["tokenfile"].get(confuse.Filename(in_app_dir=True))
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def authenticate(self, c_key, c_secret):
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# Get the link for the OAuth page.
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auth_client = Client(USER_AGENT, c_key, c_secret)
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try:
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_, _, url = auth_client.get_authorize_url()
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except CONNECTION_ERRORS as e:
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self._log.debug("connection error: {}", e)
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raise beets.ui.UserError("communication with Discogs failed")
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beets.ui.print_("To authenticate with Discogs, visit:")
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beets.ui.print_(url)
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# Ask for the code and validate it.
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code = beets.ui.input_("Enter the code:")
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try:
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token, secret = auth_client.get_access_token(code)
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except DiscogsAPIError:
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raise beets.ui.UserError("Discogs authorization failed")
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except CONNECTION_ERRORS as e:
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self._log.debug("connection error: {}", e)
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raise beets.ui.UserError("Discogs token request failed")
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# Save the token for later use.
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self._log.debug("Discogs token {}, secret {}", token, secret)
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with open(self._tokenfile(), "w") as f:
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json.dump({"token": token, "secret": secret}, f)
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return token, secret
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def candidates(
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self, items: Sequence[Item], artist: str, album: str, va_likely: bool
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) -> Iterable[AlbumInfo]:
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return self.get_albums(f"{artist} {album}" if va_likely else album)
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def get_track_from_album(
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self, album_info: AlbumInfo, compare: Callable[[TrackInfo], float]
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) -> TrackInfo | None:
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"""Return the best matching track of the release."""
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scores_and_tracks = [(compare(t), t) for t in album_info.tracks]
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score, track_info = min(scores_and_tracks, key=lambda x: x[0])
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if score > 0.3:
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return None
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track_info["artist"] = album_info.artist
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track_info["artist_id"] = album_info.artist_id
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track_info["album"] = album_info.album
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return track_info
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def item_candidates(
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self, item: Item, artist: str, title: str
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) -> Iterable[TrackInfo]:
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albums = self.candidates([item], artist, title, False)
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def compare_func(track_info: TrackInfo) -> float:
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return string_dist(track_info.title, title)
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tracks = (self.get_track_from_album(a, compare_func) for a in albums)
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return list(filter(None, tracks))
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def album_for_id(self, album_id: str) -> AlbumInfo | None:
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"""Fetches an album by its Discogs ID and returns an AlbumInfo object
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or None if the album is not found.
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"""
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self._log.debug("Searching for release {}", album_id)
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discogs_id = self._extract_id(album_id)
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if not discogs_id:
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return None
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result = Release(self.discogs_client, {"id": discogs_id})
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# Try to obtain title to verify that we indeed have a valid Release
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try:
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getattr(result, "title")
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except DiscogsAPIError as e:
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if e.status_code != 404:
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self._log.debug(
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"API Error: {} (query: {})",
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e,
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result.data["resource_url"],
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)
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if e.status_code == 401:
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self.reset_auth()
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return self.album_for_id(album_id)
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return None
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except CONNECTION_ERRORS:
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self._log.debug("Connection error in album lookup", exc_info=True)
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return None
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return self.get_album_info(result)
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def track_for_id(self, track_id: str) -> TrackInfo | None:
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if album := self.album_for_id(track_id):
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for track in album.tracks:
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if track.track_id == track_id:
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return track
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return None
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def get_albums(self, query: str) -> Iterable[AlbumInfo]:
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"""Returns a list of AlbumInfo objects for a discogs search query."""
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# Strip non-word characters from query. Things like "!" and "-" can
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# cause a query to return no results, even if they match the artist or
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# album title. Use `re.UNICODE` flag to avoid stripping non-english
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# word characters.
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query = re.sub(r"(?u)\W+", " ", query)
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# Strip medium information from query, Things like "CD1" and "disk 1"
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# can also negate an otherwise positive result.
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query = re.sub(r"(?i)\b(CD|disc|vinyl)\s*\d+", "", query)
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try:
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results = self.discogs_client.search(query, type="release")
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results.per_page = self.config["search_limit"].get()
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releases = results.page(1)
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except CONNECTION_ERRORS:
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self._log.debug(
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"Communication error while searching for {0!r}",
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query,
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exc_info=True,
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)
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return []
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return filter(None, map(self.get_album_info, releases))
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@cache
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def get_master_year(self, master_id: str) -> int | None:
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"""Fetches a master release given its Discogs ID and returns its year
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or None if the master release is not found.
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"""
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self._log.debug("Getting master release {}", master_id)
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result = Master(self.discogs_client, {"id": master_id})
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try:
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return result.fetch("year")
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except DiscogsAPIError as e:
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if e.status_code != 404:
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self._log.debug(
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"API Error: {} (query: {})",
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e,
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result.data["resource_url"],
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)
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if e.status_code == 401:
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self.reset_auth()
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return self.get_master_year(master_id)
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return None
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except CONNECTION_ERRORS:
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self._log.debug(
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"Connection error in master release lookup", exc_info=True
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)
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return None
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@staticmethod
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def get_media_and_albumtype(
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formats: list[ReleaseFormat] | None,
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) -> tuple[str | None, str | None]:
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media = albumtype = None
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if formats and (first_format := formats[0]):
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if descriptions := first_format["descriptions"]:
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albumtype = ", ".join(descriptions)
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media = first_format["name"]
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return media, albumtype
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def get_album_info(self, result):
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"""Returns an AlbumInfo object for a discogs Release object."""
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# Explicitly reload the `Release` fields, as they might not be yet
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# present if the result is from a `discogs_client.search()`.
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if not result.data.get("artists"):
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try:
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result.refresh()
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except CONNECTION_ERRORS:
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self._log.debug(
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"Connection error in release lookup: {0}",
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result,
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)
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return None
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# Sanity check for required fields. The list of required fields is
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# defined at Guideline 1.3.1.a, but in practice some releases might be
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# lacking some of these fields. This function expects at least:
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# `artists` (>0), `title`, `id`, `tracklist` (>0)
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# https://www.discogs.com/help/doc/submission-guidelines-general-rules
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if not all(
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[
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result.data.get(k)
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for k in ["artists", "title", "id", "tracklist"]
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]
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):
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self._log.warning("Release does not contain the required fields")
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return None
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artist, artist_id = self.get_artist(
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[a.data for a in result.artists], join_key="join"
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)
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album = re.sub(r" +", " ", result.title)
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album_id = result.data["id"]
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# Use `.data` to access the tracklist directly instead of the
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# convenient `.tracklist` property, which will strip out useful artist
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# information and leave us with skeleton `Artist` objects that will
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# each make an API call just to get the same data back.
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tracks = self.get_tracks(result.data["tracklist"])
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# Extract information for the optional AlbumInfo fields, if possible.
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va = result.data["artists"][0].get("name", "").lower() == "various"
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year = result.data.get("year")
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mediums = [t.medium for t in tracks]
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country = result.data.get("country")
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data_url = result.data.get("uri")
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style = self.format(result.data.get("styles"))
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base_genre = self.format(result.data.get("genres"))
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if self.config["append_style_genre"] and style:
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genre = self.config["separator"].as_str().join([base_genre, style])
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else:
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genre = base_genre
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discogs_albumid = self._extract_id(result.data.get("uri"))
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# Extract information for the optional AlbumInfo fields that are
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# contained on nested discogs fields.
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media, albumtype = self.get_media_and_albumtype(
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result.data.get("formats")
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)
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label = catalogno = labelid = None
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if result.data.get("labels"):
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label = self.strip_disambiguation(
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result.data["labels"][0].get("name")
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)
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catalogno = result.data["labels"][0].get("catno")
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labelid = result.data["labels"][0].get("id")
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cover_art_url = self.select_cover_art(result)
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# Additional cleanups
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# (various artists name, catalog number, media, disambiguation).
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if va:
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artist = config["va_name"].as_str()
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else:
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artist = self.strip_disambiguation(artist)
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if catalogno == "none":
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catalogno = None
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# Explicitly set the `media` for the tracks, since it is expected by
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# `autotag.apply_metadata`, and set `medium_total`.
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for track in tracks:
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track.media = media
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track.medium_total = mediums.count(track.medium)
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if not track.artist: # get_track_info often fails to find artist
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track.artist = artist
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if not track.artist_id:
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track.artist_id = artist_id
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# Discogs does not have track IDs. Invent our own IDs as proposed
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# in #2336.
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track.track_id = f"{album_id}-{track.track_alt}"
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track.data_url = data_url
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track.data_source = "Discogs"
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# Retrieve master release id (returns None if there isn't one).
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master_id = result.data.get("master_id")
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# Assume `original_year` is equal to `year` for releases without
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# a master release, otherwise fetch the master release.
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original_year = self.get_master_year(master_id) if master_id else year
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return AlbumInfo(
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album=album,
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album_id=album_id,
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artist=artist,
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artist_id=artist_id,
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tracks=tracks,
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albumtype=albumtype,
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va=va,
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year=year,
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label=label,
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mediums=len(set(mediums)),
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releasegroup_id=master_id,
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catalognum=catalogno,
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country=country,
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style=style,
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genre=genre,
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media=media,
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original_year=original_year,
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data_source=self.data_source,
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data_url=data_url,
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discogs_albumid=discogs_albumid,
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discogs_labelid=labelid,
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discogs_artistid=artist_id,
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cover_art_url=cover_art_url,
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)
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def select_cover_art(self, result):
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"""Returns the best candidate image, if any, from a Discogs `Release` object."""
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if result.data.get("images") and len(result.data.get("images")) > 0:
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# The first image in this list appears to be the one displayed first
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# on the release page - even if it is not flagged as `type: "primary"` - and
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# so it is the best candidate for the cover art.
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return result.data.get("images")[0].get("uri")
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return None
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def format(self, classification):
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if classification:
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return (
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self.config["separator"].as_str().join(sorted(classification))
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)
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else:
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return None
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def get_tracks(self, tracklist):
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"""Returns a list of TrackInfo objects for a discogs tracklist."""
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try:
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clean_tracklist = self.coalesce_tracks(tracklist)
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except Exception as exc:
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# FIXME: this is an extra precaution for making sure there are no
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# side effects after #2222. It should be removed after further
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# testing.
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self._log.debug("{}", traceback.format_exc())
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self._log.error("uncaught exception in coalesce_tracks: {}", exc)
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clean_tracklist = tracklist
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tracks = []
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index_tracks = {}
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index = 0
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# Distinct works and intra-work divisions, as defined by index tracks.
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divisions, next_divisions = [], []
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for track in clean_tracklist:
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# Only real tracks have `position`. Otherwise, it's an index track.
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if track["position"]:
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index += 1
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if next_divisions:
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# End of a block of index tracks: update the current
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# divisions.
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divisions += next_divisions
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del next_divisions[:]
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track_info = self.get_track_info(track, index, divisions)
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track_info.track_alt = track["position"]
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tracks.append(track_info)
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else:
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next_divisions.append(track["title"])
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# We expect new levels of division at the beginning of the
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# tracklist (and possibly elsewhere).
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try:
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divisions.pop()
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except IndexError:
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pass
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index_tracks[index + 1] = track["title"]
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# Fix up medium and medium_index for each track. Discogs position is
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# unreliable, but tracks are in order.
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medium = None
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medium_count, index_count, side_count = 0, 0, 0
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sides_per_medium = 1
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# If a medium has two sides (ie. vinyl or cassette), each pair of
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# consecutive sides should belong to the same medium.
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if all([track.medium is not None for track in tracks]):
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m = sorted({track.medium.lower() for track in tracks})
|
|
# If all track.medium are single consecutive letters, assume it is
|
|
# a 2-sided medium.
|
|
if "".join(m) in ascii_lowercase:
|
|
sides_per_medium = 2
|
|
|
|
for track in tracks:
|
|
# Handle special case where a different medium does not indicate a
|
|
# new disc, when there is no medium_index and the ordinal of medium
|
|
# is not sequential. For example, I, II, III, IV, V. Assume these
|
|
# are the track index, not the medium.
|
|
# side_count is the number of mediums or medium sides (in the case
|
|
# of two-sided mediums) that were seen before.
|
|
medium_is_index = (
|
|
track.medium
|
|
and not track.medium_index
|
|
and (
|
|
len(track.medium) != 1
|
|
or
|
|
# Not within standard incremental medium values (A, B, C, ...).
|
|
ord(track.medium) - 64 != side_count + 1
|
|
)
|
|
)
|
|
|
|
if not medium_is_index and medium != track.medium:
|
|
side_count += 1
|
|
if sides_per_medium == 2:
|
|
if side_count % sides_per_medium:
|
|
# Two-sided medium changed. Reset index_count.
|
|
index_count = 0
|
|
medium_count += 1
|
|
else:
|
|
# Medium changed. Reset index_count.
|
|
medium_count += 1
|
|
index_count = 0
|
|
medium = track.medium
|
|
|
|
index_count += 1
|
|
medium_count = 1 if medium_count == 0 else medium_count
|
|
track.medium, track.medium_index = medium_count, index_count
|
|
|
|
# Get `disctitle` from Discogs index tracks. Assume that an index track
|
|
# before the first track of each medium is a disc title.
|
|
for track in tracks:
|
|
if track.medium_index == 1:
|
|
if track.index in index_tracks:
|
|
disctitle = index_tracks[track.index]
|
|
else:
|
|
disctitle = None
|
|
track.disctitle = disctitle
|
|
|
|
return tracks
|
|
|
|
def coalesce_tracks(self, raw_tracklist):
|
|
"""Pre-process a tracklist, merging subtracks into a single track. The
|
|
title for the merged track is the one from the previous index track,
|
|
if present; otherwise it is a combination of the subtracks titles.
|
|
"""
|
|
|
|
def add_merged_subtracks(tracklist, subtracks):
|
|
"""Modify `tracklist` in place, merging a list of `subtracks` into
|
|
a single track into `tracklist`."""
|
|
# Calculate position based on first subtrack, without subindex.
|
|
idx, medium_idx, sub_idx = self.get_track_index(
|
|
subtracks[0]["position"]
|
|
)
|
|
position = f"{idx or ''}{medium_idx or ''}"
|
|
|
|
if tracklist and not tracklist[-1]["position"]:
|
|
# Assume the previous index track contains the track title.
|
|
if sub_idx:
|
|
# "Convert" the track title to a real track, discarding the
|
|
# subtracks assuming they are logical divisions of a
|
|
# physical track (12.2.9 Subtracks).
|
|
tracklist[-1]["position"] = position
|
|
else:
|
|
# Promote the subtracks to real tracks, discarding the
|
|
# index track, assuming the subtracks are physical tracks.
|
|
index_track = tracklist.pop()
|
|
# Fix artists when they are specified on the index track.
|
|
if index_track.get("artists"):
|
|
for subtrack in subtracks:
|
|
if not subtrack.get("artists"):
|
|
subtrack["artists"] = index_track["artists"]
|
|
# Concatenate index with track title when index_tracks
|
|
# option is set
|
|
if self.config["index_tracks"]:
|
|
for subtrack in subtracks:
|
|
subtrack["title"] = (
|
|
f"{index_track['title']}: {subtrack['title']}"
|
|
)
|
|
tracklist.extend(subtracks)
|
|
else:
|
|
# Merge the subtracks, pick a title, and append the new track.
|
|
track = subtracks[0].copy()
|
|
track["title"] = " / ".join([t["title"] for t in subtracks])
|
|
tracklist.append(track)
|
|
|
|
# Pre-process the tracklist, trying to identify subtracks.
|
|
subtracks = []
|
|
tracklist = []
|
|
prev_subindex = ""
|
|
for track in raw_tracklist:
|
|
# Regular subtrack (track with subindex).
|
|
if track["position"]:
|
|
_, _, subindex = self.get_track_index(track["position"])
|
|
if subindex:
|
|
if subindex.rjust(len(raw_tracklist)) > prev_subindex:
|
|
# Subtrack still part of the current main track.
|
|
subtracks.append(track)
|
|
else:
|
|
# Subtrack part of a new group (..., 1.3, *2.1*, ...).
|
|
add_merged_subtracks(tracklist, subtracks)
|
|
subtracks = [track]
|
|
prev_subindex = subindex.rjust(len(raw_tracklist))
|
|
continue
|
|
|
|
# Index track with nested sub_tracks.
|
|
if not track["position"] and "sub_tracks" in track:
|
|
# Append the index track, assuming it contains the track title.
|
|
tracklist.append(track)
|
|
add_merged_subtracks(tracklist, track["sub_tracks"])
|
|
continue
|
|
|
|
# Regular track or index track without nested sub_tracks.
|
|
if subtracks:
|
|
add_merged_subtracks(tracklist, subtracks)
|
|
subtracks = []
|
|
prev_subindex = ""
|
|
tracklist.append(track)
|
|
|
|
# Merge and add the remaining subtracks, if any.
|
|
if subtracks:
|
|
add_merged_subtracks(tracklist, subtracks)
|
|
|
|
return tracklist
|
|
|
|
def strip_disambiguation(self, text) -> str:
|
|
"""Removes discogs specific disambiguations from a string.
|
|
Turns 'Label Name (5)' to 'Label Name' or 'Artist (1) & Another Artist (2)'
|
|
to 'Artist & Another Artist'. Does nothing if strip_disambiguation is False."""
|
|
if not self.config["strip_disambiguation"]:
|
|
return text
|
|
return DISAMBIGUATION_RE.sub("", text)
|
|
|
|
def get_track_info(self, track, index, divisions):
|
|
"""Returns a TrackInfo object for a discogs track."""
|
|
title = track["title"]
|
|
if self.config["index_tracks"]:
|
|
prefix = ", ".join(divisions)
|
|
if prefix:
|
|
title = f"{prefix}: {title}"
|
|
track_id = None
|
|
medium, medium_index, _ = self.get_track_index(track["position"])
|
|
artist, artist_id = self.get_artist(
|
|
track.get("artists", []), join_key="join"
|
|
)
|
|
artist = self.strip_disambiguation(artist)
|
|
length = self.get_track_length(track["duration"])
|
|
return TrackInfo(
|
|
title=title,
|
|
track_id=track_id,
|
|
artist=artist,
|
|
artist_id=artist_id,
|
|
length=length,
|
|
index=index,
|
|
medium=medium,
|
|
medium_index=medium_index,
|
|
)
|
|
|
|
@staticmethod
|
|
def get_track_index(
|
|
position: str,
|
|
) -> tuple[str | None, str | None, str | None]:
|
|
"""Returns the medium, medium index and subtrack index for a discogs
|
|
track position."""
|
|
# Match the standard Discogs positions (12.2.9), which can have several
|
|
# forms (1, 1-1, A1, A1.1, A1a, ...).
|
|
medium = index = subindex = None
|
|
if match := TRACK_INDEX_RE.fullmatch(position.upper()):
|
|
medium, index, subindex = match.groups()
|
|
|
|
if subindex and subindex.startswith("."):
|
|
subindex = subindex[1:]
|
|
|
|
return medium or None, index or None, subindex or None
|
|
|
|
def get_track_length(self, duration):
|
|
"""Returns the track length in seconds for a discogs duration."""
|
|
try:
|
|
length = time.strptime(duration, "%M:%S")
|
|
except ValueError:
|
|
return None
|
|
return length.tm_min * 60 + length.tm_sec
|