75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
from fastapi import APIRouter, Depends, Query
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from sqlalchemy import text
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from sqlalchemy.ext.asyncio import AsyncSession
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from core.database import get_session
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router = APIRouter()
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VESDA_ZONES = {
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"sg-01": [
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{"zone_id": "vesda-hall-a", "room_id": "hall-a"},
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{"zone_id": "vesda-hall-b", "room_id": "hall-b"},
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]
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}
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LEVEL_MAP = {0: "normal", 1: "alert", 2: "action", 3: "fire"}
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VESDA_TYPES = ("vesda_level", "vesda_obscuration", "vesda_det1", "vesda_det2",
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"vesda_power", "vesda_flow")
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@router.get("/status")
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async def fire_status(
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site_id: str = Query(...),
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session: AsyncSession = Depends(get_session),
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):
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"""Latest VESDA readings per fire zone."""
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types_sql = ", ".join(f"'{t}'" for t in VESDA_TYPES)
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result = await session.execute(text(f"""
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SELECT DISTINCT ON (sensor_id)
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sensor_id, sensor_type, value
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FROM readings
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WHERE site_id = :site_id
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AND sensor_type IN ({types_sql})
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AND recorded_at > NOW() - INTERVAL '2 minutes'
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ORDER BY sensor_id, recorded_at DESC
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"""), {"site_id": site_id})
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zone_data: dict[str, dict] = {}
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for row in result.mappings().all():
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parts = row["sensor_id"].split("/")
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if len(parts) < 3:
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continue
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zone_id = parts[2]
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if zone_id not in zone_data:
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zone_data[zone_id] = {"zone_id": zone_id}
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v = float(row["value"])
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s_type = row["sensor_type"]
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if s_type == "vesda_level":
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zone_data[zone_id]["level"] = LEVEL_MAP.get(round(v), "normal")
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elif s_type == "vesda_obscuration":
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zone_data[zone_id]["obscuration_pct_m"] = round(v, 3)
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elif s_type == "vesda_det1":
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zone_data[zone_id]["detector_1_ok"] = v > 0.5
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elif s_type == "vesda_det2":
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zone_data[zone_id]["detector_2_ok"] = v > 0.5
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elif s_type == "vesda_power":
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zone_data[zone_id]["power_ok"] = v > 0.5
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elif s_type == "vesda_flow":
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zone_data[zone_id]["flow_ok"] = v > 0.5
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zone_room_map = {z["zone_id"]: z["room_id"] for z in VESDA_ZONES.get(site_id, [])}
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out = []
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for zone_cfg in VESDA_ZONES.get(site_id, []):
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zone_id = zone_cfg["zone_id"]
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d = zone_data.get(zone_id, {"zone_id": zone_id})
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d.setdefault("level", "normal")
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d.setdefault("obscuration_pct_m", None)
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d.setdefault("detector_1_ok", True)
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d.setdefault("detector_2_ok", True)
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d.setdefault("power_ok", True)
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d.setdefault("flow_ok", True)
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d["room_id"] = zone_room_map.get(zone_id)
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out.append(d)
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return out
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