root.js

/* global require */
var http = require('http');
var fs = require('fs');
var path = require('path');
var express = require('express');
var path = require('path');
var app = express();
var cons = require('consolidate');
var reducedir = require('reduce-dir');

app.set('port', process.env.PORT || 3001);

app.engine('hbs', cons.handlebars);
app.set('view engine', 'hbs');

app.get('/exampletemplate', function(res, res) {
  res.render('example', {
    data: 'hello'
  });
});

// Allow reading the files directly. express.directory and express.static
// work together to make a file browser
app.use('/raw', express.directory('api'));
app.use('/raw', express.static('api'));

// Serve static assets
app.use('/', express.static(path.join(__dirname, '/public/app')));

// Routes for serving our HTML pages
app.get('/', function(req, res) {
  res.sendfile('public/app/base.html');
});
app.get('/chapters/:chapterName', function(req, res) {
  res.sendfile('public/app/base.html');
});
app.get('/chapters/:chapterName/:submoduleName', function(req, res) {
  res.sendfile('public/app/base.html');
});
app.get('/chapters', function(req, res) {
  res.sendfile('public/app/base.html');
});

app.get('/api/*', function(req, res) {
  generic_handler(req, res, 'api/'+req.params.join('/'));
});

function sanitize(req, res, next) {
  for (var key in req.params) {
    if (req.params[key].indexOf(".") > -1) {
      return res.json(400, "Bad request");
    }
  }
  next();
}

function generic_handler(req, res, dirpath) {

  function callback(err, files) {
    if (err) {
      return notFound(err, res);
    }
    //
    // Validate the files are json before we try and load them
    //
    var root = path.join(__dirname, dirpath);
    var data  = files.filter(function (file) {
      return /.json$/.test(file);
    }).map(function (file) {
      var d;
      try { d = require(path.join(root, file)); }
      catch (ex) { d = null; }
      return d;
    }).filter(Boolean);

    var submodules = files.filter(function (file) {
      return fs.statSync(path.join(root, file)).isDirectory(); // TODO make async
    });

    var _files = files.filter(function (file) {
      return fs.statSync(path.join(root, file)).isFile(); // TODO make async
    });

    res.json(200, {'module':path.basename(root), path:path.relative(__dirname, path.dirname(root)), data: data, submodules:submodules, files:_files});
  }

  fs.readdir(dirpath, callback);
}

function notFound(err, res) {
  //
  // TODO: send better error responses
  //
  res.writeHead(500, { 'content-type': 'application/json' });
  return res.end(JSON.stringify({ error: err.message, reason: 'invalid parameters'}));
}

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});