rename to lrx
resolve conflicts
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"""
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Author: Uyanide pywang0608@foxmail.com
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Date: 2026-03-25 11:09:53
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Description: Core orchestrator — coordinates fetchers with cache-aware fallback
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"""
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"""
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Fetch pipeline:
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1. Check cache for each source in the fallback sequence
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2. For sources without a valid cache hit, call the fetcher
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3. Cache every result (success, not-found, or error) per source
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4. Return the best result (synced > unsynced > None)
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"""
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from typing import Optional
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from loguru import logger
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from .fetchers import FetcherMethodType, create_fetchers
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from .fetchers.base import BaseFetcher
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from .cache import CacheEngine
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from .lrc import normalize_tags, normalize_unsynced, detect_sync_status
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from .config import TTL_SYNCED, TTL_UNSYNCED, TTL_NOT_FOUND, TTL_NETWORK_ERROR
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from .models import TrackMeta, LyricResult, CacheStatus
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from .enrichers import enrich_track
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# Maps CacheStatus to the default TTL used when storing results
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_STATUS_TTL: dict[CacheStatus, Optional[int]] = {
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CacheStatus.SUCCESS_SYNCED: TTL_SYNCED,
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CacheStatus.SUCCESS_UNSYNCED: TTL_UNSYNCED,
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CacheStatus.NOT_FOUND: TTL_NOT_FOUND,
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CacheStatus.NETWORK_ERROR: TTL_NETWORK_ERROR,
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}
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class LrcManager:
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"""Main entry point for fetching lyrics with caching."""
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def __init__(self) -> None:
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self.cache = CacheEngine()
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self.fetchers = create_fetchers(self.cache)
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def _build_sequence(
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self, track: TrackMeta, force_method: Optional[FetcherMethodType] = None
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) -> list[BaseFetcher]:
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"""Determine the ordered list of fetchers to try."""
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if force_method:
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if force_method not in self.fetchers:
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logger.error(f"Unknown method: {force_method}")
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return []
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return [self.fetchers[force_method]]
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sequence: list[BaseFetcher] = []
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for method in self.fetchers.keys():
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if self.fetchers[method].is_available(track):
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sequence.append(self.fetchers[method])
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logger.debug(f"Fallback sequence: {[f.source_name for f in sequence]}")
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return sequence
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def fetch_for_track(
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self,
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track: TrackMeta,
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force_method: Optional[FetcherMethodType] = None,
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bypass_cache: bool = False,
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) -> Optional[LyricResult]:
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"""Fetch lyrics for *track* using the fallback pipeline.
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Each source is checked against the cache independently:
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- Cache hit with synced lyrics → return immediately
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- Cache hit with negative status (NOT_FOUND / NETWORK_ERROR) → skip source
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- Cache miss or unsynced → call fetcher, then cache the result
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After all sources are tried, returns the best result found
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(synced > unsynced > None).
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"""
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track = enrich_track(track)
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logger.info(f"Fetching lyrics for: {track.display_name()}")
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sequence = self._build_sequence(track, force_method)
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if not sequence:
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return None
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# Best result seen so far (synced wins over unsynced)
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best_result: Optional[LyricResult] = None
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for fetcher in sequence:
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source = fetcher.source_name
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# Cache check (skip for fetchers that handle their own caching)
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if not bypass_cache and not fetcher.self_cached:
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cached = self.cache.get(track, source)
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if cached:
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if cached.status == CacheStatus.SUCCESS_SYNCED:
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logger.info(f"[{source}] cache hit: synced lyrics")
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return cached
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elif cached.status == CacheStatus.SUCCESS_UNSYNCED:
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logger.debug(
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f"[{source}] cache hit: unsynced lyrics (continuing)"
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)
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if best_result is None:
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best_result = cached
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continue # Try next source for synced
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elif cached.status in (
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CacheStatus.NOT_FOUND,
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CacheStatus.NETWORK_ERROR,
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):
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logger.debug(
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f"[{source}] cache hit: {cached.status.value}, skipping"
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)
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continue
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elif not fetcher.self_cached:
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logger.debug(f"[{source}] cache bypassed")
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# Fetch
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logger.debug(f"[{source}] calling fetcher...")
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result = fetcher.fetch(track, bypass_cache=bypass_cache)
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if not result:
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logger.debug(f"[{source}] returned None (no result)")
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continue
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# Cache the result (skip for self-cached fetchers)
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if not fetcher.self_cached:
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ttl = result.ttl or _STATUS_TTL.get(result.status, TTL_NOT_FOUND)
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self.cache.set(track, source, result, ttl_seconds=ttl)
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# Evaluate result
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if result.status == CacheStatus.SUCCESS_SYNCED:
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logger.info(f"[{source}] got synced lyrics")
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return result
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if result.status == CacheStatus.SUCCESS_UNSYNCED:
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logger.debug(f"[{source}] got unsynced lyrics (continuing)")
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if best_result is None:
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best_result = result
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# NOT_FOUND / NETWORK_ERROR: already cached, try next
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# Return best available
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if best_result:
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# Normalize unsynced lyrics: set all timestamps to [00:00.00]
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if (
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best_result.status == CacheStatus.SUCCESS_UNSYNCED
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and best_result.lyrics
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):
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best_result = LyricResult(
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status=best_result.status,
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lyrics=normalize_unsynced(best_result.lyrics),
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source=best_result.source,
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ttl=best_result.ttl,
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)
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logger.info(
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f"Returning unsynced lyrics from {best_result.source} "
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f"(no synced source found)"
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)
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else:
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logger.info(f"No lyrics found for {track.display_name()}")
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return best_result
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def manual_insert(
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self,
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track: TrackMeta,
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lyrics: str,
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) -> None:
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"""Manually insert lyrics into the cache for a track."""
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track = enrich_track(track)
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logger.info(f"Manually inserting lyrics for: {track.display_name()}")
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lyrics = normalize_tags(lyrics)
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result = LyricResult(
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status=detect_sync_status(lyrics),
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lyrics=normalize_tags(lyrics),
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source="manual",
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ttl=None,
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)
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self.cache.set(track, "manual", result, ttl_seconds=None)
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logger.info("Lyrics inserted into cache.")
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