distance-calculator-openrouteservice/src/index.js

A free Node.js library to calculate distance between places using OpenRouteService.

import axios from 'axios';
import dotenv from 'dotenv';

// Load environment variables
dotenv.config();

const API_KEY = process.env.ORS_API_KEY;

async function geocodePlace(place) {
  const response = await axios.get('https://api.openrouteservice.org/geocode/search', {
    params: {
      api_key: API_KEY,
      text: place,
      size: 1
    }
  });
  const coords = response.data.features[0]?.geometry?.coordinates;
  return coords ? [coords[0], coords[1]] : null;
}

async function getDistance(from, to, mode = 'driving-car') {
  if (typeof from === 'string') from = await geocodePlace(from);
  if (typeof to === 'string') to = await geocodePlace(to);

  if (!from || !to) throw new Error('Invalid location provided');

  const response = await axios.post(
    `https://api.openrouteservice.org/v2/directions/${mode}`,
    { coordinates: [from, to] },
    {
      headers: {
        Authorization: API_KEY,
        'Content-Type': 'application/json'
      }
    }
  );

  const { distance, duration } = response.data.routes[0].summary;

  return {
    distance_km: (distance / 1000).toFixed(2),
    duration_minutes: (duration / 60).toFixed(2),
    mode,
    from,
    to
  };
}

export default getDistance;