44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
from __future__ import annotations
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import asyncio
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from contextlib import suppress
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from datetime import timezone
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from app.db.session import SessionLocal
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from app.repositories.audio_repository import AudioRepository
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from app.ws.router import manager # используем тот же manager, что и в ws/router.py
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def _iso_z(dt) -> str:
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return dt.astimezone(timezone.utc).isoformat().replace("+00:00", "Z")
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async def audio_live_broadcaster(poll_interval_sec: float = 0.05) -> None:
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"""
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Poll latest row and broadcast only when a NEW row appears.
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Throttling per client is handled by manager.broadcast_json().
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"""
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last_time = None
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while True:
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try:
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async with SessionLocal() as db:
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repo = AudioRepository(db)
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rows = await repo.latest(1)
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if rows:
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row = rows[0]
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if last_time is None or row.time > last_time:
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last_time = row.time
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await manager.broadcast_json(
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{
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"time": _iso_z(row.time),
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"rms_db": float(row.rms_db),
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"freq_hz": int(row.frequency_hz),
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}
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)
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except Exception:
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# не даём таске умереть при временных проблемах БД
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pass
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await asyncio.sleep(poll_interval_sec)
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