ユーザーデータの保存

function(user, context, callback){
  user.user_metadata = user.user_metadata || {};
  user.user_metadata.displayName = user.user_metadata.displayName || "user";

  auth0.users.updateUserMetadata(user.user_id, user.user_metadata)
    .then(function(){
      callback(null, user, context);
    })
    .catch(function(err){
      callback(err);
    });
}

function (user, context, callback) {

  var request = require('request');

  user.app_metadata = user.app_metadata || {};
  user.app_metadata.roles = user.roles || [];

  var CLIENT_SECRET = configuration.AUTH0_CLIENT_SECRET;
  var CLIENT_ID = configuration.AUTH0_CLIENT_ID;

  var scope = {
    user_id: user.user_id,
    email: user.email,
    name: user.name
  };

  var options = {
    subject: user.user_id,
    expiresInMinutes: 600,
    audience: CLIENT_ID,
    issuer: 'https://example.auth0.com'
  };

  var id_token = jwt.sign(scope, CLIENT_SECRET, options);

  var auth = 'Bearer ' + id_token;

  request.get({
    url: 'https://example.com/playlists/getPlays',
    headers: {
       'Authorization': auth,
      'Content-Type': 'text/html'
    },
    timeout: 15000
  }, function(err, response, body){
    if (err)
      return callback(new Error(err));
    var plays = parseInt(body, 10);

    if (plays >= 100 && user.roles.indexOf('playlist_editor') < 0){
      user.app_metadata.roles.push('playlist_editor');
      auth0.users.updateAppMetadata(user.user_id, user.app_metadata)
        .then(function(){
          callback(null, user, context);
        })
        .catch(callback);
    }

    else if (plays < 100 && user.roles.indexOf('playlist_editor') >= 0){
      user.app_metadata.roles = [];
      auth0.users.updateAppMetadata(user.user_id, user.app_metadata)
        .then(function(){
          callback(null, user, context);
        })
        .catch(callback);
    }
    else{
      callback(null, user, context);
    }

  });

}

function(user, context, callback) {
   if (user.app_metadata) {
      user.roles = user.app_metadata.roles;
   }
   user.roles = user.roles || [];
   callback(null, user, context);
}

var genres = require('./routes/genres');
var songs = require('./routes/songs');
var playlists = require('./routes/playlists');
var displayName = require('./routes/displayName');

var authenticate = jwt({
  secret: process.env.AUTH0_CLIENT_SECRET,
  audience: process.env.AUTH0_CLIENT_ID
});

app.use('/genres', authenticate, genres);
app.use('/songs', authenticate, songs);
app.use('/playlists', authenticate, playlists);
app.use('/displayName', authenticate, displayName);

@IBAction func getGenre(sender: AnyObject) {
        let request = buildAPIRequest("/genres/getFav", type:"GET")
        let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {[unowned self](data, response, error) in
            let genre = NSString(data: data!, encoding: NSUTF8StringEncoding)
            dispatch_async(dispatch_get_main_queue(), {
                self.favGenre.text = "Favorite Genre:  \(genre!)"
            })
        }
        task.resume()
    }

function queryGenre(user_id, res){

  db.connect(process.env.DATABASE_URL, function(err, client) {
  if (err) throw err;

  client
    .query('SELECT fav_genre as value FROM user_data WHERE user_id = $1', [user_id], function(err, result) {

      if(err) {
        return console.error('error running query', err);
      }
      res.send(result.rows[0].value);
    });
  });

};