Logan CusanoandClaude Opus 5.5
3347ced863
GET /traffic/511 serves a bbox slice of the statewide 511NY camera and event feeds from an in-memory cache (cameras 1h, events 2m TTL, fetched lazily) -- public data, so no Firestore writes. A failed refresh keeps the last good data and reports the error; a schema change (nothing parses) is an error, not an empty layer. Frontend: opt-in "DOT Cameras" and "Traffic Events" overlays that fetch only while shown, with an on-map notice when the feed is down or stale. NY511_API_KEY is optional in config (the API answers without one today; the terms require a registered key). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
39 lines
1.4 KiB
Python
39 lines
1.4 KiB
Python
import asyncio
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from typing import Optional
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from fastapi import APIRouter, HTTPException, Query
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from app.internal import ny511
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router = APIRouter(prefix="/traffic", tags=["traffic"])
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# Per-layer cap per response. A statewide view is ~3k cameras; past this the
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# map is unreadable anyway, and the client is told the list was cut.
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MAX_ITEMS = 1500
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def _feed_status(feed: "ny511._Feed") -> dict:
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return {"fetched_at": feed.fetched_at, "error": feed.error}
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@router.get("/511")
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async def get_511(
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south: float = Query(..., ge=-90, le=90),
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west: float = Query(..., ge=-180, le=180),
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north: float = Query(..., ge=-90, le=90),
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east: float = Query(..., ge=-180, le=180),
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layers: Optional[str] = Query("cameras,events", description="comma list: cameras, events"),
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):
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if south > north or west > east:
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raise HTTPException(400, "bbox must satisfy south<=north and west<=east")
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wanted = {s.strip() for s in (layers or "").split(",") if s.strip()}
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feeds = {name: getattr(ny511, name) for name in ("cameras", "events") if name in wanted}
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await asyncio.gather(*(f.get() for f in feeds.values()))
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out: dict = {}
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for name, feed in feeds.items():
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hits = ny511.in_bbox(feed.items, south, west, north, east)
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out[name] = hits[:MAX_ITEMS]
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out[f"{name}_status"] = {**_feed_status(feed), "total_in_bbox": len(hits), "truncated": len(hits) > MAX_ITEMS}
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return out
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