index.js

'use strict'
const fetch = require('node-fetch');
const Bot = require('./bot.js');

/* get token from env variable for security reasons
    eg.
       when running the bot process use 
       
       SLACK_TOKEN = <BOT_SLACK_TOKEN_HERE> node index.js
*/

const token = process.env.SLACK_TOKEN;

// create bot instance
const bot = new Bot({
    token: token,
    autoReconnect: true,
    autoMark: true
});

/* 
bot respond commands
giggle-bot listens on message events incoming and looks for 
specific string patterns if found giggle-bot responds based on 
particular pattern
*/

bot.respondTo('giggle help', (message, channel, user) => {
        bot.send('- To make me crack a random joke type \`joke\`\n\
        - To make me joke about a friend or anyone, type \`joke <username>\`\n\
        - For my cool awesome selfie type \`gigpic\`\n\
        - To display this message again type \`giggle help\`\n\
        - There is an easter egg for you. Find it to unleash my greatest power', channel);
    },
    true);

bot.respondTo('joke', (message, channel, user) => {

        let tokenArr = message.text.split(' ');

        if (tokenArr.length === 1) {

            /* 
            making giggle bot send joke to channel if no argument is specified

            eg.
            bot.send('Sorry, somebody forgot to put some jokes in me, ok', channel);

            write send message code here
            */
            let url = 'https://api.chucknorris.io/jokes/random';

            fetch(url)
                .then(function(res) {
                    return res.json();
                }).then(function(json) {
                    bot.send(json.value, channel);
                });
        } else {
            /* 
            taking argument and cracking a joke with the given argument

            eg. 
            let args = tokenArr.slice(1);
            bot.send(`${args[0]} looks like ..., arrhh I need some damn jokes`, channel);

            write send message code here
            */
            let url = 'https://api.chucknorris.io/jokes/random';
            let args = tokenArr.slice(1);
            fetch(url)
                .then(function(res) {
                    return res.json();
                }).then(function(json) {


                    let joke = json.value.replace(/(chuck norris|chuck|chucky)/gi, args[0]);

                    bot.send(joke, channel);
                });

        }

    },
    true);

bot.respondTo('mom', (message, channel, user) => {

    let tokenArr = message.text.split(' ');
    if (tokenArr.length === 1) {
        let url = 'http://api.yomomma.info/';

        function getJoke() {
            fetch(url)
                .then(function(res) {
                    return res.json();
                }).then(function(json) {
                    bot.send(json.joke, channel);
                });
        }
        setTimeout(getJoke, 2000);
    } else {
        bot.send("It's not nice to target a friend's MOMMA!!!! Even Giggle has his limits!!", channel);
    }
}, true);

bot.respondTo('gigpic', (message, channel, user) => {

    let tokenArr = message.text.split(' ');
    if (tokenArr.length === 1) {
        function selfie() {
            bot.send("http://www.scenictrail.com/LonghornSheep_2.jpg", channel);
        }
        setTimeout(selfie, 2000);
    } else {
        bot.send("huh", channel);
    }
}, true);