Snippets for my Medium Post: Creating a Slack Command Bot from Scratch with Node.js & Distribute It

01.txt

command=/httpstatus 
text=302 
response_url=https://hooks.slack.com/commands/1234/5678 ...

02.js

'use strict';
const express = require('express');
const bodyParser = require('body-parser');
const app = express();
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));

const server = app.listen(3000, () => {  
  console.log('Express server listening on port %d in %s mode', server.address().port, app.settings.env);});
const bodyParser = require('body-parser'); 

03.js

app.post('/', (req, res) => {
  let text = req.body.text;
  // implement your bot here ...
});

04.js

if(! /^\d+$/.test(q.text)) { // not a digit
  res.send('U R DOIN IT WRONG. Enter a status code like 200!');
  return;
}

05.js

let data = {
  response_type: 'in_channel', // public to the channel
  text: '302: Found',
  attachments:[
    {
      image_url: 'https://http.cat/302.jpg'
    }
]};
res.json(data);

06.txt

SLACK_CLIENT_ID=12345XXXXX.09876XXXXX
SLACK_CLIENT_SECRET=535d2f9....
SLACK_VERIFICATION_TOKEN=42P829U...

07.txt

web: node index.js

08.html

<a href="https://slack.com/oauth/authorize?scope=commands+team%3Aread&client_id=your_client_id">

09.js

const request = require('request');

app.get('/slack', function(req, res){
  var data = {form: {
      client_id: process.env.SLACK_CLIENT_ID,
      client_secret: process.env.SLACK_CLIENT_SECRET,
      code: req.query.code
  }};
  request.post('https://slack.com/api/oauth.access', data, function (error, response, body) {
    if (!error && response.statusCode == 200) {
      // You are done.
      // If you want to get team info, you need to get the token here
      let token = JSON.parse(body).access_token; // Auth token
    }
  ...

10.js

...
  request.post('https://slack.com/api/team.info', {form: {token: token}},     function (error, response, body) {
    if (!error && response.statusCode == 200) {
      let team = JSON.parse(body).team.domain;
      res.redirect('http://' +team+ '.slack.com');
    }
  });