63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
from __future__ import annotations
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from typing import TypedDict
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from yarl import URL
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from ..cache import Cache, make_cache
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from ..tools.asyncio import run_background_task
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from .types import CurrentSongResponse, MpdStateHandler
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CACHE_TTL = 60 * 60 # seconds = 1 hour
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class ArtCacheEntry(TypedDict):
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data: bytes | None
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def calc_album_key(song: CurrentSongResponse) -> str:
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artist = song.get("albumartist", song.get("artist", "Unknown Artist"))
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album = song.get("album", "Unknown Album")
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return ":".join(t.replace(":", "-") for t in (artist, album))
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def calc_track_key(song: CurrentSongResponse) -> str:
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return song["file"]
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MEMORY = URL("memory://")
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class MpdArtworkCache:
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mpd: MpdStateHandler
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album_cache: Cache[ArtCacheEntry]
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track_cache: Cache[ArtCacheEntry]
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def __init__(self, mpd: MpdStateHandler, cache_url: URL = MEMORY):
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self.mpd = mpd
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self.album_cache = make_cache(cache_url, "album")
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self.track_cache = make_cache(cache_url, "track")
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async def get_cached_artwork(self, song: CurrentSongResponse) -> bytes | None:
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art = await self.track_cache.get(calc_track_key(song))
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if art:
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return art["data"]
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# If we don't have track artwork cached, go find some.
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run_background_task(self.cache_artwork(song))
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# Even if we don't have cached track art, we can try looking for cached album art.
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art = await self.album_cache.get(calc_album_key(song))
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if art:
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return art["data"]
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return None
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async def cache_artwork(self, song: CurrentSongResponse) -> None:
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art = ArtCacheEntry(data=await self.mpd.get_art(song["file"]))
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try:
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await self.album_cache.add(calc_album_key(song), art, ttl=CACHE_TTL)
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except ValueError:
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pass
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await self.track_cache.set(calc_track_key(song), art, ttl=CACHE_TTL)
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await self.mpd.refresh()
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