Slack API Router

slack-api.js

const router = require('express').Router();
const { WebClient } = require('@slack/client');

const {
    SLACK_CLIENT_ID,
    SLACK_CLIENT_SECRET,
    SLACK_AUTHORIZE_URL
} = require('@codedojo/core/config');
const { logger } = require('@codedojo/core/services');
const { User } = require('@codedojo/core/models');

const logEvent = logger.createLogger('slack');
const logError = logger.createLogger('slack', 'error');
const web = new WebClient();

router.get('/authorize', (req, res) => {
    return web.oauth.access({
        client_id: SLACK_CLIENT_ID,
        client_secret: SLACK_CLIENT_SECRET,
        code: req.query.code,
        redirect_uri: SLACK_AUTHORIZE_URL
    })
        .then(logEvent)
        .catch(logError);
});

router.post('/events', (req, res) => {
    if (req.body.type === 'url_verification' && req.body.challenge) {
        return res.send(req.body.challenge);
    }

    const event = req.body.event;

    if (event && event.type === 'team_join' && event.user) {
        const email = event.user.profile && event.user.profile.email;
        const slackId = event.user.id;

        User.findOne({ email })
            .then(user => {
                user.slackId = slackId;

                return user.save();
            })
            .then(() => res.sendStatus(200))
            .catch(error => {
                logError(error);
                res.sendStatus(500);
            });
    }

    logEvent({
        type: event && event.type,
        data: req.body
    });
});

module.exports = router;