Support MPD_NOW_PLAYABLE_CACHE setting (Redis or Memcached)

pdm.lock

@@ -2,10 +2,10 @@
 # It is not intended for manual editing.
 
 [metadata]
-groups = ["default", "dev"]
+groups = ["default", "all", "dev"]
 strategy = ["cross_platform"]
 lock_version = "4.4.1"
-content_hash = "sha256:edd2d2385248f816649983cdbeb254c328ed27d57c5df0c96773a436383bd9ba"
+content_hash = "sha256:2b4fba8ca6883f5a1de28a420870d566efa031d62f9057c59095a25a0e51d36e"
 
 [[package]]
 name = "aiocache"
@@ -16,19 +16,57 @@ files = [
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 ]
 
+[[package]]
+name = "aiocache"
+version = "0.12.2"
+extras = ["memcached"]
+summary = "multi backend asyncio cache"
+dependencies = [
+    "aiocache==0.12.2",
+    "aiomcache>=0.5.2",
+]
+files = [
+    {file = "aiocache-0.12.2-py2.py3-none-any.whl", hash = "sha256:9b6fa30634ab0bfc3ecc44928a91ff07c6ea16d27d55469636b296ebc6eb5918"},
+    {file = "aiocache-0.12.2.tar.gz", hash = "sha256:b41c9a145b050a5dcbae1599f847db6dd445193b1f3bd172d8e0fe0cb9e96684"},
+]
+
+[[package]]
+name = "aiocache"
+version = "0.12.2"
+extras = ["redis"]
+summary = "multi backend asyncio cache"
+dependencies = [
+    "aiocache==0.12.2",
+    "redis>=4.2.0",
+]
+files = [
+    {file = "aiocache-0.12.2-py2.py3-none-any.whl", hash = "sha256:9b6fa30634ab0bfc3ecc44928a91ff07c6ea16d27d55469636b296ebc6eb5918"},
+    {file = "aiocache-0.12.2.tar.gz", hash = "sha256:b41c9a145b050a5dcbae1599f847db6dd445193b1f3bd172d8e0fe0cb9e96684"},
+]
+
+[[package]]
+name = "aiomcache"
+version = "0.8.2"
+requires_python = ">=3.8"
+summary = "Minimal pure python memcached client"
+files = [
+    {file = "aiomcache-0.8.2-py3-none-any.whl", hash = "sha256:9d78d6b6e74e775df18b350b1cddfa96bd2f0a44d49ad27fa87759a3469cef5e"},
+    {file = "aiomcache-0.8.2.tar.gz", hash = "sha256:43b220d7f499a32a71871c4f457116eb23460fa216e69c1d32b81e3209e51359"},
+]
+
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 name = "attrs"
-version = "23.1.0"
+version = "23.2.0"
 requires_python = ">=3.7"
 summary = "Classes Without Boilerplate"
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+    {file = "attrs-23.2.0.tar.gz", hash = "sha256:935dc3b529c262f6cf76e50877d35a4bd3c1de194fd41f47a2b7ae8f19971f30"},
 ]
 
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 name = "mypy"
-version = "1.7.1"
+version = "1.10.0"
 requires_python = ">=3.8"
 summary = "Optional static typing for Python"
 dependencies = [
@@ -36,13 +74,13 @@ dependencies = [
     "typing-extensions>=4.1.0",
 ]
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 ]
 
 [[package]]
@@ -55,145 +93,169 @@ files = [
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 ]
 
+[[package]]
+name = "ormsgpack"
+version = "1.5.0"
+requires_python = ">=3.8"
+summary = "Fast, correct Python msgpack library supporting dataclasses, datetimes, and numpy"
+files = [
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-version = "10.0"
+version = "10.2"
 requires_python = ">=3.8"
 summary = "Python<->ObjC Interoperability Module"
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+version = "10.2"
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 summary = "Wrappers for the framework AVFoundation on macOS"
 dependencies = [
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+    "pyobjc-core>=10.2",
-    "pyobjc-framework-Cocoa>=10.0",
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-    "pyobjc-framework-CoreAudio>=10.0",
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-    "pyobjc-framework-CoreMedia>=10.0",
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 requires_python = ">=3.8"
 summary = "Wrappers for the Cocoa frameworks on macOS"
 dependencies = [
-    "pyobjc-core>=10.0",
+    "pyobjc-core>=10.2",
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 summary = "Wrappers for the framework CoreAudio on macOS"
 dependencies = [
-    "pyobjc-core>=10.0",
+    "pyobjc-core>=10.2",
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 summary = "Wrappers for the framework CoreMedia on macOS"
 dependencies = [
-    "pyobjc-core>=10.0",
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 summary = "Wrappers for the framework MediaPlayer on macOS"
 dependencies = [
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+    "pyobjc-core>=10.2",
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 summary = "Wrappers for the Quartz frameworks on macOS"
 dependencies = [
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 ]
 
 [[package]]
 name = "typing-extensions"
-version = "4.8.0"
+version = "4.11.0"
 requires_python = ">=3.8"
 summary = "Backported and Experimental Type Hints for Python 3.8+"
 files = [
-    {file = "typing_extensions-4.8.0-py3-none-any.whl", hash = "sha256:8f92fc8806f9a6b641eaa5318da32b44d401efaac0f6678c9bc448ba3605faa0"},
+    {file = "typing_extensions-4.11.0-py3-none-any.whl", hash = "sha256:c1f94d72897edaf4ce775bb7558d5b79d8126906a14ea5ed1635921406c0387a"},
-    {file = "typing_extensions-4.8.0.tar.gz", hash = "sha256:df8e4339e9cb77357558cbdbceca33c303714cf861d1eef15e1070055ae8b7ef"},
+    {file = "typing_extensions-4.11.0.tar.gz", hash = "sha256:83f085bd5ca59c80295fc2a82ab5dac679cbe02b9f33f7d83af68e241bea51b0"},
 ]

pyproject.toml

@@ -23,6 +23,16 @@ classifiers = [
     "Topic :: Multimedia :: Sound/Audio :: Players",
 ]
 
+[project.optional-dependencies]
+redis = ["aiocache[redis]"]
+memcached = ["aiocache[memcached]"]
+msgpack = [
+    "ormsgpack>=1.5.0",
+]
+all = [
+    "mpd-now-playable[redis,memcached,msgpack]",
+]
+
 [project.urls]
 Homepage = "https://git.00dani.me/00dani/mpd-now-playable"
 Issues = "https://git.00dani.me/00dani/mpd-now-playable/issues"

src/mpd_now_playable/cache.py

@@ -0,0 +1,55 @@
+from __future__ import annotations
+
+from contextlib import suppress
+from typing import Any, Optional, TypeVar
+from urllib.parse import parse_qsl, urlparse
+
+from aiocache import Cache
+from aiocache.serializers import BaseSerializer, PickleSerializer
+
+T = TypeVar("T")
+
+HAS_ORMSGPACK = False
+with suppress(ImportError):
+	import ormsgpack
+
+	HAS_ORMSGPACK = True
+
+
+class OrmsgpackSerializer(BaseSerializer):
+	DEFAULT_ENCODING = None
+
+	def dumps(self, value: Any) -> bytes:
+		return ormsgpack.packb(value)
+
+	def loads(self, value: Optional[bytes]) -> Any:
+		if value is None:
+			return None
+		return ormsgpack.unpackb(value)
+
+
+def make_cache(url: str, namespace: str = "") -> Cache[T]:
+	parsed_url = urlparse(url)
+	backend = Cache.get_scheme_class(parsed_url.scheme)
+	if backend == Cache.MEMORY:
+		return Cache(backend)
+	kwargs: dict[str, Any] = dict(parse_qsl(parsed_url.query))
+
+	if parsed_url.path:
+		kwargs.update(backend.parse_uri_path(parsed_url.path))
+
+	if parsed_url.hostname:
+		kwargs["endpoint"] = parsed_url.hostname
+
+	if parsed_url.port:
+		kwargs["port"] = parsed_url.port
+
+	if parsed_url.password:
+		kwargs["password"] = parsed_url.password
+
+	namespace = ":".join(s for s in [kwargs.get("namespace"), namespace] if s)
+	del kwargs["namespace"]
+
+	serializer = OrmsgpackSerializer if HAS_ORMSGPACK else PickleSerializer
+
+	return Cache(backend, serializer=serializer(), namespace=namespace, **kwargs)

src/mpd_now_playable/cli.py

@@ -11,10 +11,11 @@ async def listen() -> None:
 	port = int(environ.get("MPD_PORT", "6600"))
 	host = environ.get("MPD_HOST", "localhost")
 	password = environ.get("MPD_PASSWORD")
+	cache = environ.get("MPD_NOW_PLAYABLE_CACHE")
 	if password is None and "@" in host:
 		password, host = host.split("@", maxsplit=1)
 
-	listener = MpdStateListener()
+	listener = MpdStateListener(cache)
 	now_playing = CocoaNowPlaying(listener)
 	await listener.start(host=host, port=port, password=password)
 	await listener.loop(now_playing)

src/mpd_now_playable/cocoa/now_playing.py

@@ -82,7 +82,7 @@ def song_to_media_item(song: Song) -> NSMutableDictionary:
 	nowplaying_info = nothing_to_media_item()
 	nowplaying_info[MPNowPlayingInfoPropertyMediaType] = MPNowPlayingInfoMediaTypeAudio
 	nowplaying_info[MPNowPlayingInfoPropertyElapsedPlaybackTime] = song.elapsed
-	nowplaying_info[MPNowPlayingInfoPropertyExternalContentIdentifier] = song.file
+	nowplaying_info[MPNowPlayingInfoPropertyExternalContentIdentifier] = str(song.file)
 	nowplaying_info[MPNowPlayingInfoPropertyPlaybackQueueCount] = song.queue_length
 	nowplaying_info[MPNowPlayingInfoPropertyPlaybackQueueIndex] = song.queue_index
 	nowplaying_info[MPMediaItemPropertyPersistentID] = song_to_persistent_id(song)

src/mpd_now_playable/mpd/artwork_cache.py

@@ -1,30 +1,16 @@
-from dataclasses import dataclass
+from __future__ import annotations
 
-from aiocache import Cache
+from typing import TypedDict
 
 from ..async_tools import run_background_task
+from ..cache import Cache, make_cache
 from .types import CurrentSongResponse, MpdStateHandler
 
 CACHE_TTL = 60 * 10  # ten minutes
 
 
-@dataclass(frozen=True)
+class ArtCacheEntry(TypedDict):
-class HasArt:
+	data: bytes | None
-	data: bytes
-
-
-@dataclass(frozen=True)
-class HasNoArt:
-	data = None
-
-
-ArtCacheEntry = HasArt | HasNoArt
-
-
-def make_cache_entry(art: bytes | None) -> ArtCacheEntry:
-	if art is None:
-		return HasNoArt()
-	return HasArt(art)
 
 
 def calc_album_key(song: CurrentSongResponse) -> str:
@@ -39,18 +25,18 @@ def calc_track_key(song: CurrentSongResponse) -> str:
 
 class MpdArtworkCache:
 	mpd: MpdStateHandler
-	album_cache: "Cache[ArtCacheEntry]"
+	album_cache: Cache[ArtCacheEntry]
-	track_cache: "Cache[ArtCacheEntry]"
+	track_cache: Cache[ArtCacheEntry]
 
-	def __init__(self, mpd: MpdStateHandler):
+	def __init__(self, mpd: MpdStateHandler, cache_url: str = "memory://"):
 		self.mpd = mpd
-		self.album_cache = Cache()
+		self.album_cache = make_cache(cache_url, "album")
-		self.track_cache = Cache()
+		self.track_cache = make_cache(cache_url, "track")
 
 	async def get_cached_artwork(self, song: CurrentSongResponse) -> bytes | None:
 		art = await self.track_cache.get(calc_track_key(song))
 		if art:
-			return art.data
+			return art["data"]
 
 		# If we don't have track artwork cached, go find some.
 		run_background_task(self.cache_artwork(song))
@@ -58,12 +44,12 @@ class MpdArtworkCache:
 		# Even if we don't have cached track art, we can try looking for cached album art.
 		art = await self.album_cache.get(calc_album_key(song))
 		if art:
-			return art.data
+			return art["data"]
 
 		return None
 
 	async def cache_artwork(self, song: CurrentSongResponse) -> None:
-		art = make_cache_entry(await self.mpd.readpicture(song["file"]))
+		art = ArtCacheEntry(data=await self.mpd.readpicture(song["file"]))
 		try:
 			await self.album_cache.add(calc_album_key(song), art, ttl=CACHE_TTL)
 		except ValueError:

src/mpd_now_playable/mpd/listener.py

@@ -44,9 +44,11 @@ class MpdStateListener(Player):
 	art_cache: MpdArtworkCache
 	idle_count = 0
 
-	def __init__(self) -> None:
+	def __init__(self, cache: str | None = None) -> None:
 		self.client = MPDClient()
-		self.art_cache = MpdArtworkCache(self)
+		self.art_cache = (
+			MpdArtworkCache(self, cache) if cache else MpdArtworkCache(self)
+		)
 
 	async def start(
 		self, host: str = "localhost", port: int = 6600, password: str | None = None

stubs/aiocache/base.pyi

@@ -0,0 +1,7 @@
+from typing import Generic, TypeVar
+
+T = TypeVar("T")
+
+class BaseCache(Generic[T]):
+	@staticmethod
+	def parse_uri_path(path: str) -> dict[str, str]: ...

stubs/aiocache/factory.pyi

@@ -1,8 +1,25 @@
-from typing import Generic, Optional, TypeVar
+from typing import ClassVar, Optional, TypeVar
 
-T = TypeVar('T')
+from .base import BaseCache
+from .serializers import BaseSerializer
 
-class Cache(Generic[T]):
+T = TypeVar("T")
+
+class Cache(BaseCache[T]):
+	MEMORY: ClassVar[type[BaseCache]]
+	REDIS: ClassVar[type[BaseCache] | None]
+	MEMCACHED: ClassVar[type[BaseCache] | None]
+
+	def __new__(
+		cls,
+		cache_class: type[BaseCache] = MEMORY,
+		*,
+		serializer: Optional[BaseSerializer] = None,
+		namespace: str = "",
+		**kwargs,
+	) -> Cache[T]: ...
+	@staticmethod
+	def get_scheme_class(scheme: str) -> type[BaseCache]: ...
 	async def add(self, key: str, value: T, ttl: Optional[int]) -> None: ...
 	async def set(self, key: str, value: T, ttl: Optional[int]) -> None: ...  # noqa: A003
 	async def get(self, key: str, default: T | None = None) -> T | None: ...

stubs/aiocache/serializers.pyi

@@ -0,0 +1,14 @@
+from abc import ABC, abstractmethod
+from typing import Any, Optional
+
+class BaseSerializer(ABC):
+	DEFAULT_ENCODING: Optional[str] = "utf-8"
+	@abstractmethod
+	def dumps(self, value: Any, /) -> Any: ...
+	@abstractmethod
+	def loads(self, value: Any, /) -> Any: ...
+
+class PickleSerializer(BaseSerializer):
+	DEFAULT_ENCODING = None
+	def dumps(self, value: Any, /) -> Any: ...
+	def loads(self, value: Any, /) -> Any: ...