tf-liedetector

app.js

var ApiBuilder = require('claudia-api-builder')
var pg = require('pg')
var request = require('request-promise-native')
var find = require('lodash.find')

var api = new ApiBuilder()
var sentimentUrl = "http://sentiment.vivekn.com/api/text/"

// Check for auth as a strange kind of middleware thing
function requiresAuth(req, fn) {
  if (process.env.KEY == req.queryString.key) {
    return fn(req)
  } else {
    return new api.ApiResponse({error: '403 Forbidden'}, {'Content-Type': 'application/json'}, 403)
  }
}

/**
* configuration settings come from environment:
* PGUSER * PGDATABASE * PGPASSWORD * PGPORT * PGHOST
*/
var db = new pg.Client()

api.get('/', requiresAuth(req, (req) => {
  var answers = req.body.form_response.answers
  var rating = find(answers, ['type', 'number'])
  var explanation = find(answers, ['type', 'text'])
  var sentiment

  request({
    uri: sentimentUrl,
    method: 'POST',
    form: { txt: explanation }
  }).then(body => sentiment = body.result)
    .catch(err => console.log(err))

  var insertQuery = 'INSERT INTO responses (rating, explanation, sentiment, confidence) VALUES ($1, $2, $3, $4)'
  return db.query(insertQuery, [], (err, result) => {
    if (err) {
      return new ApiResponse({error: err.message}, {'Content-Type': 'application/json'}, 500)
    }
    return new ApiResponse({}, {'Content-Type': 'application/json'}, 200)
  })
}))

module.exports = api