feat: monitor sweep, real MB browser, and worker-loop wiring

worker/lyra_worker/_mbbrowser.py

@@ -0,0 +1,44 @@
+from lyra_worker.browser import ArtistHit, ReleaseGroupInfo
+
+
+class MusicBrainzBrowser:
+    """Real MbBrowser via musicbrainzngs (imported lazily; not unit-tested offline)."""
+
+    def __init__(self, app_name: str = "Lyra", version: str = "0.1", contact: str = "lyra@localhost"):
+        self._app, self._version, self._contact = app_name, version, contact
+
+    def _ua(self):
+        import musicbrainzngs
+
+        musicbrainzngs.set_useragent(self._app, self._version, self._contact)
+        return musicbrainzngs
+
+    def search_artist(self, name: str) -> list[ArtistHit]:
+        mb = self._ua()
+        res = mb.search_artists(query=name, limit=8)
+        return [
+            ArtistHit(mbid=a["id"], name=a.get("name", ""), disambiguation=a.get("disambiguation", ""))
+            for a in res.get("artist-list", [])
+        ]
+
+    def browse_release_groups(self, artist_mbid: str) -> list[ReleaseGroupInfo]:
+        mb = self._ua()
+        out: list[ReleaseGroupInfo] = []
+        offset = 0
+        while True:
+            res = mb.browse_release_groups(artist=artist_mbid, limit=100, offset=offset)
+            groups = res.get("release-group-list", [])
+            for g in groups:
+                out.append(
+                    ReleaseGroupInfo(
+                        rg_mbid=g["id"],
+                        title=g.get("title", ""),
+                        primary_type=g.get("primary-type", "") or "",
+                        secondary_types=tuple(g.get("secondary-type-list", []) or ()),
+                        first_release_date=g.get("first-release-date", "") or "",
+                    )
+                )
+            offset += len(groups)
+            if len(groups) < 100 or offset >= int(res.get("release-group-count", offset)):
+                break
+        return out

worker/lyra_worker/main.py

@@ -3,10 +3,12 @@ import time
 from lyra_worker.claim import claim_next
 from lyra_worker.config import get_config
 from lyra_worker.db import wait_for_db
+from lyra_worker.monitor import MonitorConfig, reconcile, sweep
 from lyra_worker.pipeline import run_pipeline
-from lyra_worker.registry import build_adapters, build_resolver, build_tagger
+from lyra_worker.registry import build_adapters, build_browser, build_resolver, build_tagger
 
 IDLE_SLEEP = 2.0
+MONITOR_TICK_SECONDS = 60.0
 
 
 def run_forever() -> None:
@@ -14,16 +16,34 @@ def run_forever() -> None:
     adapters = build_adapters(get_config(conn))
     resolver = build_resolver()
     tagger = build_tagger()
+    browser = build_browser()
     print(f"worker: {len(adapters)} adapter(s) enabled: {[a.name for a in adapters]}", flush=True)
     print("worker: waiting for jobs", flush=True)
+    last_tick = 0.0
     try:
         while True:
+            mcfg = MonitorConfig.from_config(get_config(conn))
+            now = time.monotonic()
+            if mcfg.enabled and now - last_tick >= MONITOR_TICK_SECONDS:
+                try:
+                    sweep(conn, browser, mcfg)
+                except Exception as e:  # a monitor error must never kill the worker
+                    print(f"worker: monitor sweep failed: {e}", flush=True)
+                    conn.rollback()
+                last_tick = now
+
             job_id = claim_next(conn)
             if job_id is None:
                 time.sleep(IDLE_SLEEP)
                 continue
             print(f"worker: claimed job {job_id}", flush=True)
             run_pipeline(conn, job_id, adapters, resolver=resolver, tagger=tagger)
+            if mcfg.enabled:
+                try:
+                    reconcile(conn, job_id, mcfg)
+                except Exception as e:
+                    print(f"worker: reconcile failed for job {job_id}: {e}", flush=True)
+                    conn.rollback()
             print(f"worker: finished job {job_id}", flush=True)
     finally:
         conn.close()

worker/lyra_worker/monitor.py

@@ -172,3 +172,9 @@ def reconcile(conn: psycopg.Connection, job_id: str, cfg: MonitorConfig) -> None
             (quality, new_state, rel_id),
         )
     conn.commit()
+
+
+def sweep(conn: psycopg.Connection, browser: MbBrowser, cfg: MonitorConfig) -> None:
+    """One monitor pass: discover new releases, then enqueue everything due."""
+    discover(conn, browser, cfg)
+    enqueue_due(conn, cfg)

worker/lyra_worker/registry.py

@@ -1,3 +1,4 @@
+from lyra_worker._mbbrowser import MusicBrainzBrowser
 from lyra_worker._musicbrainz import MusicBrainzResolver
 from lyra_worker._mutagen import MutagenTagger
 from lyra_worker.adapters._slskd import SlskdClient
@@ -7,6 +8,7 @@ from lyra_worker.adapters.base import SourceAdapter
 from lyra_worker.adapters.qobuz import QobuzAdapter
 from lyra_worker.adapters.soulseek import SoulseekAdapter
 from lyra_worker.adapters.youtube import YouTubeAdapter
+from lyra_worker.browser import MbBrowser
 from lyra_worker.resolver import MbResolver
 from lyra_worker.tagger import Tagger
 
@@ -33,3 +35,8 @@ def build_resolver() -> MbResolver:
 def build_tagger() -> Tagger:
     """The tagger that writes canonical metadata onto downloaded files."""
     return MutagenTagger()
+
+
+def build_browser() -> MbBrowser:
+    """The MusicBrainz browser used by the background monitor."""
+    return MusicBrainzBrowser()