bot.js

// Import Botkit
const Botkit = require('botkit');
// Import Node HTTP for API requests
const http = require('http');


// Create the Botkit controller
const controller = Botkit.sparkbot({
    public_address: process.env.public_address,
    access_token: process.env.access_token,
    secret: process.env.secret,
    webhook_name: 'WeatherBot',
});


// Set up an Express-powered webserver
const webserver = require(__dirname + '/components/express_webserver.js')(controller);

// Tell Cisco Spark to start sending events to this application
require(__dirname + '/components/subscribe_events.js')(controller);

// Load in some helpers that make running Botkit on Glitch.com better
require(__dirname + '/components/plugin_glitch.js')(controller);


function getWeatherFor(bot, message, city) {
  const query = 'http://api.openweathermap.org/data/2.5/weather?q=' + encodeURI(city) 
                + '&appid=' + process.env.weather_token;
  
  http.get(query, (res) => {
    const { statusCode } = res;
    const contentType = res.headers['content-type'];
    
    res.setEncoding('utf8');

    let rawData = '';
    res.on('data', (chunk) => { rawData += chunk; });
    res.on('end', () => {
      try {
        const parsedData = JSON.parse(rawData);
        
        if(statusCode != '200') {
          bot.reply(message, parsedData.message);
          return;
        }
        
        const weather = parsedData.weather[0].description;
        const temp = Math.round((parsedData.main.temp - 273.15)*9/5 + 32);
        bot.reply(message, weather + ', ' + temp + 'F');
      } catch (e) { console.error(e.message); }
    });   
  }).on('error', (e) => {
    console.error(`Got error: ${e.message}`);
  });
}

controller.on('direct_mention', function(bot, message) {
  if(message.text){
      const query = message.text.trim();
      if(query.includes('help')) {
        bot.reply(message, 'Hi! I\'m Weatherbot! I can get you the weather in any city!');
        bot.reply(message, 'Usage: @weather-bot [city] or @weatherbot [city],[country code]');
      }    
      else {
        bot.reply(message, 'Let me check...');
        getWeatherFor(bot, message, query); 
      }
  }
});