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58e5b02929
Beets web API already allows remote players to access audio files but it doesn't provide a way to expose the playlists defined using the smartplaylist plugin. Now the smartplaylist plugin provides an option to generate ID-based item URIs/URLs instead of paths. Once playlists are generated this way, they can be served using a regular HTTP server such as nginx. To provide sufficient flexibility for various ways of integrating beets remotely (e.g. beets API, beets API with context path, AURA API, mopidy resource URI, etc), the new option has been defined as a template with an `$id` placeholder (assuming each remote integration requires a different path schema but they all rely on using the beets item `id` as identifier/path segment). To prevent local path-related plugin configuration from leaking into a HTTP URL-based playlist generation (invoked with CLI option in addition to the local playlists generated into another directory), setting the new option makes the plugin ignore the other path-related options `prefix`, `relative_to`, `forward_slash` and `urlencode`. Usage examples: * `beet splupdate --uri-format 'http://beets:8337/item/$id/file'` (for beets web API) * `beet splupdate --uri-format 'http://beets:8337/aura/tracks/$id/audio'` (for AURA API) (While it was already possible to generate playlists containing HTTP URLs previously using the `prefix` option, it did not allow to generate ID-based URLs pointing to the beets web API but required to expose the audio files using a web server directly and refer to them using their file system `$path`.) Relates to #5037
341 lines
12 KiB
Python
341 lines
12 KiB
Python
# This file is part of beets.
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# Copyright 2016, Dang Mai <contact@dangmai.net>.
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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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"""Generates smart playlists based on beets queries.
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"""
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import os
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from urllib.request import pathname2url
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from beets import ui
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from beets.dbcore import OrQuery
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from beets.dbcore.query import MultipleSort, ParsingError
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from beets.library import Album, Item, parse_query_string
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from beets.plugins import BeetsPlugin
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from beets.plugins import send as send_event
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from beets.util import (
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bytestring_path,
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displayable_path,
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mkdirall,
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normpath,
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path_as_posix,
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sanitize_path,
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syspath,
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)
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class SmartPlaylistPlugin(BeetsPlugin):
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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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"relative_to": None,
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"playlist_dir": ".",
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"auto": True,
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"playlists": [],
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"uri_format": None,
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"forward_slash": False,
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"prefix": "",
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"urlencode": False,
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"pretend_paths": False,
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"output": "m3u",
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}
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)
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self.config["prefix"].redact = True # May contain username/password.
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self._matched_playlists = None
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self._unmatched_playlists = None
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if self.config["auto"]:
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self.register_listener("database_change", self.db_change)
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def commands(self):
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spl_update = ui.Subcommand(
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"splupdate",
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help="update the smart playlists. Playlist names may be "
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"passed as arguments.",
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)
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spl_update.parser.add_option(
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"-p",
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"--pretend",
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action="store_true",
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help="display query results but don't write playlist files.",
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)
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spl_update.parser.add_option(
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"--pretend-paths",
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action="store_true",
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dest="pretend_paths",
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help="in pretend mode, log the playlist item URIs/paths.",
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)
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spl_update.parser.add_option(
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"-d",
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"--playlist-dir",
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dest="playlist_dir",
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metavar="PATH",
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type="string",
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help="directory to write the generated playlist files to.",
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)
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spl_update.parser.add_option(
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"--relative-to",
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dest="relative_to",
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metavar="PATH",
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type="string",
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help="generate playlist item paths relative to this path.",
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)
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spl_update.parser.add_option(
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"--prefix",
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type="string",
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help="prepend string to every path in the playlist file.",
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)
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spl_update.parser.add_option(
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"--forward-slash",
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action="store_true",
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dest="forward_slash",
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help="force forward slash in paths within playlists.",
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)
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spl_update.parser.add_option(
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"--urlencode",
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action="store_true",
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help="URL-encode all paths.",
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)
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spl_update.parser.add_option(
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"--uri-format",
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dest="uri_format",
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type="string",
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help="playlist item URI template, e.g. http://beets:8337/item/$id/file.",
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)
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spl_update.parser.add_option(
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"--output",
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type="string",
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help="specify the playlist format: m3u|m3u8.",
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)
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spl_update.func = self.update_cmd
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return [spl_update]
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def update_cmd(self, lib, opts, args):
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self.build_queries()
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if args:
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args = set(ui.decargs(args))
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for a in list(args):
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if not a.endswith(".m3u"):
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args.add(f"{a}.m3u")
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playlists = {
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(name, q, a_q)
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for name, q, a_q in self._unmatched_playlists
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if name in args
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}
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if not playlists:
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raise ui.UserError(
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"No playlist matching any of {} found".format(
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[name for name, _, _ in self._unmatched_playlists]
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)
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)
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self._matched_playlists = playlists
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self._unmatched_playlists -= playlists
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else:
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self._matched_playlists = self._unmatched_playlists
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self.__apply_opts_to_config(opts)
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self.update_playlists(lib, opts.pretend)
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def __apply_opts_to_config(self, opts):
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for k, v in opts.__dict__.items():
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if v is not None and k in self.config:
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self.config[k] = v
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def build_queries(self):
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"""
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Instantiate queries for the playlists.
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Each playlist has 2 queries: one or items one for albums, each with a
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sort. We must also remember its name. _unmatched_playlists is a set of
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tuples (name, (q, q_sort), (album_q, album_q_sort)).
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sort may be any sort, or NullSort, or None. None and NullSort are
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equivalent and both eval to False.
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More precisely
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- it will be NullSort when a playlist query ('query' or 'album_query')
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is a single item or a list with 1 element
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- it will be None when there are multiple items i a query
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"""
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self._unmatched_playlists = set()
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self._matched_playlists = set()
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for playlist in self.config["playlists"].get(list):
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if "name" not in playlist:
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self._log.warning("playlist configuration is missing name")
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continue
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playlist_data = (playlist["name"],)
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try:
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for key, model_cls in (("query", Item), ("album_query", Album)):
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qs = playlist.get(key)
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if qs is None:
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query_and_sort = None, None
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elif isinstance(qs, str):
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query_and_sort = parse_query_string(qs, model_cls)
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elif len(qs) == 1:
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query_and_sort = parse_query_string(qs[0], model_cls)
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else:
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# multiple queries and sorts
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queries, sorts = zip(
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*(parse_query_string(q, model_cls) for q in qs)
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)
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query = OrQuery(queries)
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final_sorts = []
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for s in sorts:
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if s:
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if isinstance(s, MultipleSort):
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final_sorts += s.sorts
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else:
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final_sorts.append(s)
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if not final_sorts:
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sort = None
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elif len(final_sorts) == 1:
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(sort,) = final_sorts
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else:
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sort = MultipleSort(final_sorts)
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query_and_sort = query, sort
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playlist_data += (query_and_sort,)
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except ParsingError as exc:
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self._log.warning(
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"invalid query in playlist {}: {}", playlist["name"], exc
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)
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continue
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self._unmatched_playlists.add(playlist_data)
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def matches(self, model, query, album_query):
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if album_query and isinstance(model, Album):
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return album_query.match(model)
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if query and isinstance(model, Item):
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return query.match(model)
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return False
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def db_change(self, lib, model):
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if self._unmatched_playlists is None:
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self.build_queries()
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for playlist in self._unmatched_playlists:
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n, (q, _), (a_q, _) = playlist
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if self.matches(model, q, a_q):
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self._log.debug("{0} will be updated because of {1}", n, model)
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self._matched_playlists.add(playlist)
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self.register_listener("cli_exit", self.update_playlists)
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self._unmatched_playlists -= self._matched_playlists
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def update_playlists(self, lib, pretend=False):
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if pretend:
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self._log.info(
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"Showing query results for {0} smart playlists...",
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len(self._matched_playlists),
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)
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else:
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self._log.info(
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"Updating {0} smart playlists...", len(self._matched_playlists)
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)
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playlist_dir = self.config["playlist_dir"].as_filename()
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playlist_dir = bytestring_path(playlist_dir)
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tpl = self.config["uri_format"].get()
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prefix = bytestring_path(self.config["prefix"].as_str())
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relative_to = self.config["relative_to"].get()
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if relative_to:
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relative_to = normpath(relative_to)
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# Maps playlist filenames to lists of track filenames.
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m3us = {}
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for playlist in self._matched_playlists:
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name, (query, q_sort), (album_query, a_q_sort) = playlist
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if pretend:
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self._log.info("Results for playlist {}:", name)
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else:
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self._log.info("Creating playlist {0}", name)
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items = []
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if query:
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items.extend(lib.items(query, q_sort))
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if album_query:
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for album in lib.albums(album_query, a_q_sort):
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items.extend(album.items())
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# As we allow tags in the m3u names, we'll need to iterate through
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# the items and generate the correct m3u file names.
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for item in items:
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m3u_name = item.evaluate_template(name, True)
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m3u_name = sanitize_path(m3u_name, lib.replacements)
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if m3u_name not in m3us:
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m3us[m3u_name] = []
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item_uri = item.path
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if tpl:
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item_uri = tpl.replace("$id", str(item.id)).encode("utf-8")
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else:
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if relative_to:
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item_uri = os.path.relpath(item_uri, relative_to)
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if self.config["forward_slash"].get():
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item_uri = path_as_posix(item_uri)
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if self.config["urlencode"]:
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item_uri = bytestring_path(pathname2url(item_uri))
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item_uri = prefix + item_uri
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if item_uri not in m3us[m3u_name]:
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m3us[m3u_name].append({"item": item, "uri": item_uri})
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if pretend and self.config["pretend_paths"]:
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print(displayable_path(item_uri))
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elif pretend:
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print(item)
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if not pretend:
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# Write all of the accumulated track lists to files.
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for m3u in m3us:
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m3u_path = normpath(
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os.path.join(playlist_dir, bytestring_path(m3u))
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)
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mkdirall(m3u_path)
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pl_format = self.config["output"].get()
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if pl_format != "m3u" and pl_format != "m3u8":
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msg = "Unsupported output format '{}' provided! "
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msg += "Supported: m3u, m3u8"
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raise Exception(msg.format(pl_format))
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m3u8 = pl_format == "m3u8"
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with open(syspath(m3u_path), "wb") as f:
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if m3u8:
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f.write(b"#EXTM3U\n")
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for entry in m3us[m3u]:
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item = entry["item"]
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comment = ""
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if m3u8:
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comment = "#EXTINF:{},{} - {}\n".format(
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int(item.length), item.artist, item.title
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)
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f.write(comment.encode("utf-8") + entry["uri"] + b"\n")
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# Send an event when playlists were updated.
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send_event("smartplaylist_update")
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if pretend:
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self._log.info(
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"Displayed results for {0} playlists",
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len(self._matched_playlists),
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)
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else:
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self._log.info(
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"{0} playlists updated", len(self._matched_playlists)
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)
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