restaurants/services/foursquare.js

Search a service and get a list of restaurants.

/**
 * Dependencies
 */

var findAll = require('./find-all')
  , get = require('superagent').get;

/**
 * FourSquare constants
 */

var CLIENT_ID = process.env.FOURSQUARE_CLIENT_ID
  , CLIENT_SECRET = process.env.FOURSQUARE_CLIENT_SECRET
  , ENDPOINT = 'https://api.foursquare.com/v2/venues/search'
  , MAX_LIMIT = 50
  , MAX_OFFSET = 0;

/**
 * Expose `search`
 */

module.exports = function(lat, lng, radius, all, callback) {
  if (!CLIENT_ID) throw new Error('Environment variable FOURSQUARE_CLIENT_ID must be defined.');
  if (!CLIENT_SECRET) throw new Error('Environment variable FOURSQUARE_CLIENT_SECRET must be defined.');

  // Run the query
  var query = {
    intent: 'browse'
  , query: 'restaurant'
  , ll: lat + ',' + lng
  , radius: radius
  , client_id: CLIENT_ID
  , client_secret: CLIENT_SECRET
  , v: '20130419'
  };

  if (all) {
    findAll(query, MAX_LIMIT, MAX_OFFSET, getRestaurants, callback);
  } else {
    getRestaurants(query, 10, 0, callback);
  }
};

/**
 * Get the getRestaurants
 */

function getRestaurants(query, limit, offset, callback) {
  query.limit = limit;
  query.offset = offset;

  get(ENDPOINT)
  .query(query)
  .end(function(err, res) {
    if (err) {
      callback(err);
    } else {
      callback(err, res.body.response.venues);
    }
  });
}