interactive.js

'use strict';

const {DEFAULT_MAX_STEPS} = require('./config');
const logger = require('./log.js');
const readline = require('readline');
const uuid = require('uuid');

module.exports = (wit, initContext, maxSteps) => {
  let context = typeof initContext === 'object' ? initContext : {};
  const sessionId = uuid.v1();

  const steps = maxSteps ? maxSteps : DEFAULT_MAX_STEPS;
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });
  rl.setPrompt('> ');
  const prompt = () => {
    rl.prompt();
    rl.write(null, {ctrl: true, name: 'e'});
  };
  prompt();
  rl.on('line', (line) => {
    line = line.trim();
    if (!line) {
      return prompt();
    }
    wit.runActions(sessionId, line, context, steps)
    .then((ctx) => {
      context = ctx;
      prompt();
    })
    .catch(err => console.error(err))
  });
};