Node.js OpenStreetMap geocode and reverse geocode API wrapper

osm-geocoder.js

'use strict'

const request = require('request-promise');

module.exports = Geocoder;

function Geocoder() {
  if (!(this instanceof Geocoder)) {
    return new Geocoder();
  }

  this.url = 'https://nominatim.openstreetmap.org';
}

Geocoder.prototype.geocode = function(options) {
  if (!options.q) { throw new Error('q parameter is required') }

  let rOptions = {
    uri: `${this.url}/search`,
    qs: {
      q: options.q,
      addressdetails: options.addressdetails || 1,
      polygon_geojson: options.polygon_geojson || 1,
      format: 'json'
    },
    json: true
  }

  return request(rOptions);
}

Geocoder.prototype.reverse = function(options) {
  if (!options.lat) { throw new Error('lat parameter is required') }
  if (!options.lon) { throw new Error('lon parameter is required') }

  let rOptions = {
    uri: `${this.url}/reverse`,
    qs: {
      lat: options.lat,
      lon: options.lon,
      addressdetails: options.addressdetails || 1,
      polygon_geojson: options.polygon_geojson || 1,
      format: 'json'
    },
    json: true
  }

  return request(rOptions);
}