Create osrm.py

services/osrm.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+import requests
+from typing import List, Tuple
+
+OSRM = "https://router.project-osrm.org"  # Public OSRM
+
+def _profile_for(mode: str) -> str:
+    # OSRMの公開プロファイル名は driving / foot / bike
+    if mode == "foot":
+        return "foot"
+    if mode == "bike":
+        return "bike"
+    return "driving"
+
+def route_polyline(coords: List[Tuple[float, float]], profile: str = "driving"):
+    locs = ";".join([f"{lon},{lat}" for lon, lat in coords])
+    url = f"{OSRM}/route/v1/{_profile_for(profile)}/{locs}"
+    params = {"overview": "full", "geometries": "geojson"}
+    r = requests.get(url, params=params, timeout=30)
+    r.raise_for_status()
+    j = r.json()
+    if not j.get("routes"):
+        return None
+    return j["routes"][0]
+
+def distance_matrix(coords: List[Tuple[float, float]], profile: str = "driving"):
+    locs = ";".join([f"{lon},{lat}" for lon, lat in coords])
+    url = f"{OSRM}/table/v1/{_profile_for(profile)}/{locs}"
+    params = {"annotations": "duration,distance"}
+    r = requests.get(url, params=params, timeout=30)
+    r.raise_for_status()
+    j = r.json()
+    return j.get("durations"), j.get("distances")