bartjs/scripts/stationdata.js

A client for interacting with the Bay Area Rapid Transit (BART) API

// Include dependencies 

var Bart = require('../lib/bart');
var turf = require('@turf/turf'); 
var geojson = require('geojson'); 
var fs = require('fs');

// Take a Bart object and call the BART API to obtain
// a list of all stations from which we construct a 
// GeoJSON object that is then written to file. 

const updateStations = function(BartObj) { 
  BartObj.stationInfo({'cmd': 'stns'})
    .then(stationJSON => {
      const stations = stationJSON.stations.station;
// Create the GeoJSON object from the stations array
      geoStations = geojson.parse(stations, { Point : ['gtfs_latitude', 
                                                     'gtfs_longitude' ]}); 
// Call the JSON.stringify arguments to prettify what is written to file 
      fs.writeFileSync('stations.js', JSON.stringify(geoStations, null, 2), 'utf-8');   
      });
}