310 lines
14 KiB
Python
310 lines
14 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 time
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import regex
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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, Any
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import aiosqlite as sqlite3
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from . import redis_cache
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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) -> None:
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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.redis_cache = redis_cache.RedisCache()
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self.cache_pre_query: str = "pragma journal_mode = WAL; pragma synchronous = normal;\
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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, matched_candidate: tuple, confidence: int,
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sqlite_rows: list[sqlite3.Row] = None, redis_results: Any = None) -> Optional[LyricsResult]:
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"""
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Get Matched Result
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Args:
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matched_candidate (tuple): the correctly matched candidate returned by matcher.best_match
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confidence (int): % confidence
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sqlite_rows (list[sqlite3.Row]|None): List of returned rows from SQLite DB, or None if Redis
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redis_results (Any): List of Redis returned data, or None if SQLite
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Returns:
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LyricsResult|None: The result, if found - None otherwise.
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"""
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matched_id: int = matched_candidate[0]
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if redis_results:
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for res in redis_results:
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(key, row) = res
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if key == matched_id:
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return LyricsResult(
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artist=row['artist'],
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song=row['song'],
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lyrics=row['lyrics'],
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src=f"{row['src']} (redis cache, id: {key})",
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confidence=row['confidence']
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)
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else:
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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 check_existence(self, artistsong: str) -> Optional[bool]:
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"""
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Check whether lyrics are already stored for track
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Args:
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artistsong (str): artist and song in artist\\nsong format
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Returns:
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bool: Whether track was found in cache
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"""
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logging.debug("Checking whether %s is already stored",
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artistsong.replace("\n", " - "))
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check_query: str = 'SELECT id, artist, song FROM lyrics WHERE editdist3((lower(artist) || " " || lower(song)), (? || " " || ?))\
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<= 410 ORDER BY editdist3((lower(artist) || " " || lower(song)), ?) ASC LIMIT 1'
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artistsong_split = artistsong.split("\n", maxsplit=1)
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artist = artistsong_split[0].lower()
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song = artistsong_split[1].lower()
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params = (artist, song, artistsong.lower())
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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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async with await db_conn.execute(check_query, params) as db_cursor:
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result = await db_cursor.fetchone()
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if result:
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logging.debug("%s is already stored.",
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artistsong.replace("\n", " - "))
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return True
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logging.debug("%s cleared to be stored.",
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artistsong)
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return False
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async def store(self, lyr_result: LyricsResult) -> None:
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"""
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Store lyrics (SQLite, then Redis)
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Args:
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lyr_result (LyricsResult): the returned lyrics to cache
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Returns: None
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"""
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sqlite_insert_id = await self.sqlite_store(lyr_result)
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if sqlite_insert_id:
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await self.redis_cache.redis_store(sqlite_insert_id, lyr_result)
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async def sqlite_rowcount(self, where: Optional[str] = None, params: Optional[tuple] = None) -> int:
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"""
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Get rowcount for cached_lyrics DB
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Args:
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where (Optional[str]): WHERE ext for query if needed
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params (Optional[tuple]): Parameters to query, if where is specified
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Returns:
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int: Number of rows found
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"""
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async with sqlite3.connect(self.cache_db, timeout=2) as db_conn:
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db_conn.row_factory = sqlite3.Row
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query = f"SELECT count(id) AS rowcount FROM lyrics {where}".strip()
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async with await db_conn.execute(query, params) as db_cursor:
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result = await db_cursor.fetchone()
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return result['rowcount']
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async def sqlite_distinct(self, column: str) -> int:
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"""
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Get count of distinct values for a column
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Args:
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column (str): The column to check
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Returns:
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int: Number of distinct values found
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"""
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async with sqlite3.connect(self.cache_db, timeout=2) as db_conn:
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db_conn.row_factory = sqlite3.Row
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query = f"SELECT COUNT(DISTINCT {column}) as distinct_items FROM lyrics"
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async with await db_conn.execute(query) as db_cursor:
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result = await db_cursor.fetchone()
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return result['distinct_items']
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async def sqlite_lyrics_length(self) -> int:
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"""
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Get total length of text stored for lyrics
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Args:
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None
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Returns:
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int: Total length of stored lyrics
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"""
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async with sqlite3.connect(self.cache_db, timeout=2) as db_conn:
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db_conn.row_factory = sqlite3.Row
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query = "SELECT SUM(LENGTH(lyrics)) as lyrics_len FROM lyrics"
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async with await db_conn.execute(query) as db_cursor:
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result = await db_cursor.fetchone()
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return result['lyrics_len']
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async def sqlite_store(self, lyr_result: LyricsResult) -> int:
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"""
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Store lyrics to SQLite Cache
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Args:
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lyr_result (LyricsResult): the returned lyrics to cache
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Returns:
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int: the inserted row id
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"""
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logging.info("Storing %s",
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f"{lyr_result.artist} - {lyr_result.song}")
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if lyr_result.src.lower() == "cache":
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logging.info("Skipping cache storage - returned LyricsResult originated from cache")
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return
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artistsong = f"{lyr_result.artist}\n{lyr_result.song}"
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if await self.check_existence(artistsong):
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logging.info("Skipping cache storage - %s is already stored.",
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artistsong.replace("\n", " - "))
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return
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try:
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lyrics = regex.sub(r'(<br>|\n|\r\n)', ' / ', lyr_result.lyrics.strip())
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lyrics = regex.sub(r'\s{2,}', ' ', lyrics)
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insert_query = "INSERT INTO lyrics (src, date_retrieved, artist, song, artistsong, confidence, lyrics)\
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VALUES(?, ?, ?, ?, ?, ?, ?)"
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params = (lyr_result.src, time.time(), lyr_result.artist,
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lyr_result.song, artistsong, lyr_result.confidence, lyrics)
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async with sqlite3.connect(self.cache_db, timeout=2) as db_conn:
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async with await db_conn.executescript(self.cache_pre_query) as _db_cursor:
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async with await db_conn.execute(insert_query, params) as _cursor:
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await db_conn.commit()
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logging.info("Stored %s to SQLite!", artistsong.replace("\n", " - "))
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return _cursor.lastrowid
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except:
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logging.critical("Cache storage error!")
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traceback.print_exc()
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# pylint: disable=unused-argument
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async def search(self, artist: str, song: str, **kwargs) -> Optional[LyricsResult]:
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"""
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Cache Search
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Args:
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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|None: The result, if found - None otherwise.
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"""
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try:
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# pylint: enable=unused-argument
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artist: str = artist.strip().lower()
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song: str = song.strip().lower()
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input_track: str = f"{artist} - {song}"
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search_query = None
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search_params: Optional[tuple] = None
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random_search: bool = False
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time_start: float = time.time()
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matcher = utils.TrackMatcher()
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if artist == "!" and song == "!":
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random_search = True
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search_query: str = 'SELECT id, artist, song, lyrics, src, confidence\
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FROM lyrics ORDER BY RANDOM() LIMIT 1'
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logging.info("Searching %s - %s on %s",
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artist, song, self.label)
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"""Check Redis First"""
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logging.debug("Checking redis cache for %s...",
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f"{artist} - {song}")
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redis_result = await self.redis_cache.search(artist=artist,
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song=song)
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if redis_result:
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result_tracks: list = []
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for returned in redis_result:
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(key, track) = returned
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result_tracks.append((key, f"{track['artist']} - {track['song']}"))
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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], 100)
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if best_match:
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(candidate, confidence) = best_match
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matched = self.get_matched(redis_results=redis_result, matched_candidate=candidate,
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confidence=confidence)
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if matched:
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time_end: float = time.time()
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time_diff: float = time_end - time_start
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matched.confidence = confidence
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matched.time = time_diff
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logging.info("Found %s on redis cache, skipping SQLite...",
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f"{artist} - {song}")
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await self.redis_cache.increment_found_count(self.label)
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return matched
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"""SQLite: Fallback"""
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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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if not random_search:
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search_query: str = 'SELECT id, artist, song, lyrics, src, confidence FROM lyrics\
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WHERE editdist3((lower(artist) || " " || lower(song)), (? || " " || ?))\
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<= 410 ORDER BY editdist3((lower(artist) || " " || lower(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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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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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], 100)
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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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matched = self.get_matched(sqlite_rows=results,
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matched_candidate=candidate,
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confidence=confidence)
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time_end: float = time.time()
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time_diff: float = time_end - time_start
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matched.time = time_diff
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await self.redis_cache.increment_found_count(self.label)
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return matched
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except:
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traceback.print_exc()
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return |