|
| 1 | +import logging |
| 2 | +from datetime import datetime |
| 3 | + |
| 4 | +import aiohttp |
| 5 | +from aiolimiter import AsyncLimiter |
| 6 | +from traveltimepy import Coordinates |
| 7 | + |
| 8 | +from traveltime_google_comparison.config import Mode |
| 9 | +from traveltime_google_comparison.requests.base_handler import ( |
| 10 | + BaseRequestHandler, |
| 11 | + RequestResult, |
| 12 | +) |
| 13 | + |
| 14 | +logger = logging.getLogger(__name__) |
| 15 | + |
| 16 | + |
| 17 | +class OSRMApiError(Exception): |
| 18 | + pass |
| 19 | + |
| 20 | + |
| 21 | +class OSRMRequestHandler(BaseRequestHandler): |
| 22 | + OSRM_ROUTES_URL = "http://router.project-osrm.org/route/v1/" |
| 23 | + |
| 24 | + default_timeout = aiohttp.ClientTimeout(total=60) |
| 25 | + |
| 26 | + def __init__(self, api_key, max_rpm): |
| 27 | + self.api_key = api_key |
| 28 | + self._rate_limiter = AsyncLimiter(max_rpm // 60, 1) |
| 29 | + |
| 30 | + async def send_request( |
| 31 | + self, |
| 32 | + origin: Coordinates, |
| 33 | + destination: Coordinates, |
| 34 | + departure_time: datetime, |
| 35 | + mode: Mode, |
| 36 | + ) -> RequestResult: |
| 37 | + route = f"{origin.lng},{origin.lat};{destination.lng},{destination.lat}" # for OSRM lat/lng are flipped! |
| 38 | + transport_mode = get_osrm_specific_mode(mode) |
| 39 | + |
| 40 | + params = { |
| 41 | + "overview": "false", |
| 42 | + } |
| 43 | + |
| 44 | + try: |
| 45 | + async with aiohttp.ClientSession( |
| 46 | + timeout=self.default_timeout |
| 47 | + ) as session, session.get( |
| 48 | + f"{self.OSRM_ROUTES_URL}{transport_mode}/{route}", params=params |
| 49 | + ) as response: |
| 50 | + data = await response.json() |
| 51 | + if response.status == 200: |
| 52 | + first_route = data["routes"][0] |
| 53 | + |
| 54 | + if not first_route: |
| 55 | + raise OSRMApiError( |
| 56 | + "No route found between origin and destination." |
| 57 | + ) |
| 58 | + |
| 59 | + total_duration = sum(leg["duration"] for leg in first_route["legs"]) |
| 60 | + |
| 61 | + return RequestResult(travel_time=int(total_duration)) |
| 62 | + else: |
| 63 | + error_message = data.get("detailedError", "") |
| 64 | + logger.error( |
| 65 | + f"Error in OSRM API response: {response.status} - {error_message}" |
| 66 | + ) |
| 67 | + return RequestResult(None) |
| 68 | + except Exception as e: |
| 69 | + logger.error(f"Exception during requesting OSRM API, {e}") |
| 70 | + return RequestResult(None) |
| 71 | + |
| 72 | + |
| 73 | +def get_osrm_specific_mode(mode: Mode) -> str: |
| 74 | + if mode == Mode.DRIVING: |
| 75 | + return "driving" |
| 76 | + elif mode == Mode.PUBLIC_TRANSPORT: |
| 77 | + raise ValueError("Public transport is not supported for OSRM requests") |
| 78 | + else: |
| 79 | + raise ValueError(f"Unsupported mode: `{mode.value}`") |
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