98 lines
4.7 KiB
Python
98 lines
4.7 KiB
Python
#!/usr/bin/env python3.12
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# pylint: disable=wrong-import-order, wrong-import-position bare-except, broad-exception-caught
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import os
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import logging
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import sys
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import traceback
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sys.path.insert(1,'..')
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sys.path.insert(1,'.')
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from typing import Optional
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import aiosqlite as sqlite3
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from lyric_search_new import utils
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from lyric_search_new.constructors import LyricsResult
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logger = logging.getLogger()
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log_level = logging.getLevelName(logger.level)
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class Cache:
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"""Cache Search Module"""
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def __init__(self):
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self.cache_db: str = os.path.join("/", "var",
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"lib", "singerdbs",
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"cached_lyrics.db")
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self.cache_pre_query: str = "pragma journal_mode = WAL; pragma synchronous = normal; pragma temp_store = memory; pragma mmap_size = 30000000000;"
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self.sqlite_exts: list[str] = ['/usr/local/lib/python3.11/dist-packages/spellfix1.cpython-311-x86_64-linux-gnu.so']
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self.label: str = "Cache"
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def get_matched(self, sqlite_rows: list[sqlite3.Row], matched_candidate: tuple, confidence: float) -> Optional[LyricsResult]:
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"""Get Matched Result"""
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matched_id: int = matched_candidate[0]
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for row in sqlite_rows:
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if row[0] == matched_id:
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(_id, artist, song, lyrics, original_src, _confidence) = row
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return LyricsResult(
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artist=artist,
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song=song,
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lyrics=lyrics,
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src=f"{original_src} (cached, id: {_id})",
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confidence=confidence)
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return None
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async def search(self, artist: str, song: str) -> Optional[LyricsResult]:
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"""
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@artist: the artist to search
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@song: the song to search
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Returns:
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- LyricsResult corresponding to nearest match found (if found), **None** otherwise
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"""
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try:
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artist: str = artist.strip().lower()
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song: str = song.strip().lower()
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search_params: Optional[tuple] = None
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random_search: bool = False
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logging.info("Searching %s - %s on %s",
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artist, song, self.label)
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async with sqlite3.connect(self.cache_db, timeout=2) as db_conn:
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await db_conn.enable_load_extension(True)
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for ext in self.sqlite_exts:
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await db_conn.load_extension(ext)
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async with await db_conn.executescript(self.cache_pre_query) as _db_cursor:
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search_query: str = 'SELECT id, artist, song, lyrics, src, confidence FROM lyrics\
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WHERE editdist3((artist || " " || song), (? || " " || ?))\
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<= 410 ORDER BY editdist3((artist || " " || song), ?) ASC LIMIT 10'
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search_params: tuple = (artist.strip(), song.strip(),
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f"{artist.strip()} {song.strip()}")
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if artist == "!" and song == "!":
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random_search: bool = True
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search_query: str = 'SELECT id, artist, song, lyrics, src, confidence FROM lyrics ORDER BY RANDOM() LIMIT 1'
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search_params = None
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async with await _db_cursor.execute(search_query, search_params) as db_cursor:
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results: list = await db_cursor.fetchall()
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result_tracks: list = []
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for track in results:
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(_id, _artist, _song, _lyrics, _src, _confidence) = track
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result_tracks.append((_id, f"{_artist} - {_song}"))
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input_track: str = f"{artist} - {song}"
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matcher = utils.TrackMatcher()
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if not random_search:
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best_match: tuple|None = matcher.find_best_match(input_track=input_track,
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candidate_tracks=result_tracks)
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else:
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best_match = (result_tracks[0], float(1))
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if not best_match:
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return None
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(candidate, confidence) = best_match
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logging.info("Result found on %s", self.label)
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return self.get_matched(sqlite_rows=results,
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matched_candidate=candidate,
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confidence=confidence)
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except:
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if log_level == "DEBUG":
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traceback.print_exc()
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return
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