Added periodic fetch

backend/main.py

@@ -1,10 +1,13 @@
+import asyncio
+import logging
 from pathlib import Path
 
 from fastapi import FastAPI
 from fastapi.staticfiles import StaticFiles
 
-from routes.fetch import router as fetch_router
+from routes.fetch import router as fetch_router, run_fetch
 from routes.events import router as events_router
+from config import ENABLE_PERIODIC_FETCH, FETCH_INTERVAL_MINUTES
 
 app = FastAPI()
 
@@ -15,3 +18,33 @@ app.include_router(events_router, prefix="/api")
 # works regardless of the working directory used to start uvicorn.
 frontend_dir = Path(__file__).parent / "frontend"
 app.mount("/", StaticFiles(directory=frontend_dir, html=True), name="frontend")
+
+
+logger = logging.getLogger("aoc.fetcher")
+
+
+async def _periodic_fetch():
+    while True:
+        try:
+            await asyncio.to_thread(run_fetch)
+            logger.info("Periodic fetch completed.")
+        except Exception as exc:
+            logger.error("Periodic fetch failed: %s", exc)
+        await asyncio.sleep(FETCH_INTERVAL_MINUTES * 60)
+
+
+@app.on_event("startup")
+async def start_periodic_fetch():
+    if ENABLE_PERIODIC_FETCH:
+        app.state.fetch_task = asyncio.create_task(_periodic_fetch())
+
+
+@app.on_event("shutdown")
+async def stop_periodic_fetch():
+    task = getattr(app.state, "fetch_task", None)
+    if task:
+        task.cancel()
+        try:
+            await task
+        except Exception:
+            pass