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76 lines
2.4 KiB
Python
76 lines
2.4 KiB
Python
# This file is part of beets.
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# Copyright 2026, J0J0 Todos.
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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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"""Genre processing for the lastgenre plugin.
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Provides GenreProcessor for validation and transformation of genre names.
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"""
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from __future__ import annotations
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from .types import Blacklist, Whitelist
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class GenreProcessor:
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"""Handles genre validation and transformation.
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- Whitelist validation: checking if genres are in the allowed set
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- Blacklist filtering: rejecting forbidden genres (global or artist-specific)
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- Future: normalization/aliasing (e.g., "D&B" -> "Drum And Bass")
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"""
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def __init__(
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self,
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whitelist: Whitelist,
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blacklist: Blacklist,
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):
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self.whitelist = whitelist
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self.blacklist = blacklist
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def is_valid(self, genre: str) -> bool:
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"""Check if genre passes whitelist validation."""
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if genre and (not self.whitelist or genre.lower() in self.whitelist):
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return True
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return False
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def is_forbidden(self, genre: str, artist: str | None = None) -> bool:
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"""Check if genre matches blacklist patterns.
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Checks global patterns ("*") and artist-specific patterns if artist
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is provided. Case-insensitive matching.
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"""
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if not self.blacklist:
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return False
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genre = genre.lower()
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# Check global forbidden patterns
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if "*" in self.blacklist:
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for pattern in self.blacklist["*"]:
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if pattern.search(genre):
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return True
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# Check artist-specific forbidden patterns
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if artist:
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artist = artist.lower()
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if artist in self.blacklist:
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for pattern in self.blacklist[artist]:
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if pattern.search(genre):
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return True
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return False
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