feat(hazards): snap to road

src/main.ts

@@ -422,9 +422,32 @@ if (process.env.HAZARDS_ENABLED) {
 		const nlat = Number(parseFloat(lat).toFixed(4));
 		const nlon = Number(parseFloat(lon).toFixed(4));
 
+		const mapMatched = await fetch((process.env.VALHALLA || "https://valhalla1.openstreetmap.de") + "/locate", {
+			method: "POST",
+			headers: {
+				"Content-Type": "application/json",
+			},
+			body: JSON.stringify({
+				locations: [
+					{
+						lat: nlat,
+						lon: nlon,
+					}
+				]
+			})
+		}).then(res => res.json()).catch(() => null);
+
+		let mmlat = nlat;
+		let mmlon = nlon;
+
+		if(mapMatched && Array.isArray(mapMatched) && mapMatched[0] && mapMatched[0].edges && mapMatched[0].edges[0]) {
+			mmlat = mapMatched[0].edges[0].correlated_lat;
+			mmlon = mapMatched[0].edges[0].correlated_lon;
+		}
+
 		const hazard = new Hazard();
-		hazard.latitude = nlat;
-		hazard.longitude = nlon;
+		hazard.latitude = mmlat;
+		hazard.longitude = mmlon;
 		hazard.type = type;
 		hazard.votes = 1;
 		hazard.user = user;