desk-controller-assistant-server.js

const http = require('http');
const heartbeat = 'echo heartbeat > /sys/class/leds/omega2p\:amber\:system/trigger';

const o = require('omega2-gpio');
const g = new o();

const run = (pin, done) => {

        g.tests().then( ()  => {
                const p = g.pin({pin: pin, debug: true, mode: 'output'});
                p.set(1);
                setTimeout( () => {
                        p.set(0);
                        done();
                }, 800);
        });
};

const send = (rs, text, status) => {
        rs.writeHead(status, { 'Content-Type': 'application/json' });
        rs.end(text, 'utf-8');
};

http.createServer( (rq, rs) => {
        console.log('request: ', rq.url);

        if (rq.url === '/mode/1') {
                run(1, () => send(rs, '{"mode": 1, "status": "OK"}', 200));
        }
        else if (rq.url === '/mode/2') {
                run(2, () => send(rs, '{"mode": 2, "status": "OK"}', 200));
        }
        else if (rq.url === '/mode/3') {
                run(3, () => send(rs, '{"mode": 3, "status": "OK"}', 200));
        }
        else {
                send(rs, '404', 404);
        }


}).listen(1337, '0.0.0.0', (err) => {
        if (err) {
                console.error('Unable to start the server', err);
                return false;
        }
        console.log('Server running at http://0.0.0.0:1337');

        const exec = require('child_process').execSync(heartbeat);

});