restaurants/services/factual.js

Search a service and get a list of restaurants.

/**
 * Dependencies
 */

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

/**
 * Factual Constants
 */

var KEY = process.env.FACTUAL_API_KEY
  , ENDPOINT = 'http://api.v3.factual.com/t/restaurants'
  , MAX_LIMIT = 50
  , MAX_OFFSET = 450;

/**
 * Expose `search`
 */

module.exports = function(lat, lng, radius, all, callback) {
  if (!KEY) throw new Error('Environment variable FACTUAL_API_KEY must be set.');

  // Run the query
  var query = {
    geo: '{"$circle":{"$center":[' + lat + ',' + lng + '],"$meters":' + radius + '}}'
  , filters: '{"category_ids":{"$nin":[355,343]}}' // exclude dessert, fast food
  , KEY: KEY
  };

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

/**
 * Get the restaurants
 */

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

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