amperka-server.js

const SSID = 'alexander';
const PASSWORD = '12341234';

const button = require('@amperka/button').connect(P7, { holdTime: 0.6 });
const led = require('@amperka/led').connect(P6);
const memory = require('@amperka/card-reader').connect(P8);
const http = require('http');

const wifi = require('@amperka/wifi').setup((err) => {
  if (err) {
    return console.log(err);
  }
  
  console.log('Connecting to Wi-Fi...');
  
  wifi.connect(SSID, PASSWORD, (err) => {
    if (err) {
      return console.log(err);
    }
    
    wifi.getIP((err, ip) => {
      if (err) {
        return console.log(err);
      }
      
      console.log('Connected to Wi-Fi! IP:', ip);
      server.listen(3000);
    });
  });
});

var Server = function() {
  this._server = http.createServer(this._onPageRequest.bind(this));
  this._events = {};
};

Server.prototype.on = function(types, callback) {
  if (typeof types == 'string') {
    types = [types];
  }
  for (var t in types) {
    if (!this._events[types[t]]) {
      this._events[types[t]] = callback;
    }
  }
};

Server.prototype.listen = function(port) {
  this._server.listen(port || 80);
};

Server.prototype._onPageRequest = function(req, res) {
  var request = url.parse(req.url, true);
  this._event(request.pathname, req, res);
};

Server.prototype._event = function(eventName, req, res) {
  res.send = function(content, headers) {
    if (headers === undefined) {
      res.writeHead(200, { 'Content-Type': 'text/html' });
    } else {
      res.writeHead(200, headers);
    }
    res.write(content);
  };
  
  if (this._events[eventName]) {
    this._events[eventName](req, res);
  } else {
    res.writeHead(404, { 'Content-Type': 'text/html' });
    res.write('<h1>404 - Not found</h1>');
  }
  
  res.end();
};

const server = new Server();

server.on('/', (req, res) => {
  const request = url.parse(req.url, true);
  const params = request.query;
  const path = decodeURIComponent(params.path || '') || '/';
  const dirs = memory.readDir(path);
  
  let html = '';
  
  const pathParts = ['/'].concat(path.split('/')).filter(v => !!v);
  let link = '';
  html += pathParts.map((part, index) => {
    
    link += '/' + (part === '/' ? '' : part);
    
    if (index === pathParts.length - 1) {
      return '<h1 style="display: inline;">' + part + '</h1>';
    }
    
    const newLink = '/?path=' + encodeURIComponent(link);
    return '<h1 style="display: inline;"><a href="' + newLink + '">' + part + '</a></h1>' + '&nbsp;/&nbsp;';
  }).join('') + '<br>';
  
  html += dirs.map(dir => {
    const link = '/?path=' + encodeURIComponent((path === '/' ? '' : path) + '/' + dir);
    return '<a href="' + link + '">' + dir + '</a><br>';
  });
  
  res.send(html);
});