List devices hook

particle.js

module['exports'] = function particle (hook) {
  var Spark = require('spark');
  function output(data) {
    hook.res.end(JSON.stringify(data, true, 2));
  }
  
  var token = hook.env.PARTICLE_API_TOKEN;

  Spark.login({ accessToken: token }).
  then(function () {
    return Spark.listDevices();
  }).then(function (devices) {
    output(devices.map(function (d) { return d.name; }));
  }).catch(function (err) {
    output(err);
  });
};