app.js

var relic = require('newrelic');
var express = require('express');
var path = require('path');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var authentication = require('./authentication');
var session = require('express-session');
var redis = require('redis');
var RedisStore = require('connect-redis')(session);
var passport = require('passport');
var http = require('http');
var uuid = require('uuid');


var api = require('./routes/api');
var index = require('./routes/index');

var client;
if (process.env.REDISTOGO_URL) {
  var rtg   = require("url").parse(process.env.REDISTOGO_URL);
  client = require("redis").createClient(rtg.port, rtg.hostname);

  client.auth(rtg.auth.split(":")[1]);
} else {
  client = redis.createClient();
}

var app = express();

authentication.init();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.engine('html', require('hbs').__express);
app.set('view engine', 'html');

var env = process.env.NODE_ENV || 'development';
app.locals.ENV = env;
app.locals.ENV_DEVELOPMENT = env == 'development';

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
  extended: true
}));
app.use(cookieParser());

app.use(express.static(path.join(__dirname, '..', 'dist')));
app.use('/signin', express.static(path.join(__dirname, '..', 'dist')));
app.use(express.static(path.join(__dirname, 'public')));

app.use(session({
  store: new RedisStore({
    'client': client
  }),
  secret: 'app-bom',
  saveUninitialized: false,
  resave: false
}));

app.use(passport.initialize());
app.use(passport.session());

app.use('/api', api);

app.get('/', index.renderPage);
app.post('/notify', api.sendNotify);
app.get('/grantDenied', index.grantDenied);

// GET /oauthSignin
//   Use passport.authenticate() as route middleware to authenticate the
//   request.  The first step in Onshape authentication will involve redirecting
//   the user to onshape.com.  After authorization, Onshape will redirect the user
//   back to this application at /oauthRedirect
app.use('/oauthSignin', storeExtraParams,
    function(req, res){
      // The request will be redirected to Onshape for authentication, so this
      // function will not be called.
    }
);

function storeExtraParams(req, res) {
  var docId = req.query.documentId;
  var workId = req.query.workspaceId;
  var elId = req.query.elementId;

  var state = {
    documentId : docId,
    workspaceId : workId,
    elementId : elId
  };

  var stateString = JSON.stringify(state);
  var uniqueID = "state" + passport.session();
  client.set(uniqueID, stateString);

  return passport.authenticate("onshape")(req, res);
}

// GET /oauthRedirect
//   Use passport.authenticate() as route middleware to authenticate the
//   request.  If authentication fails, the user will be redirected back to the
//   signin page.  Otherwise, the primary route function function will be called,
//   which, in this example, will redirect the user to the home page.
app.use('/oauthRedirect',
    passport.authenticate('onshape', { failureRedirect: '/grantDenied' }),
    function(req, res) {
      var uniqueID = "state" + passport.session();
      client.get(uniqueID, function(err, reply) {
        // reply is null when the key is missing
        if (reply != null) {
          var newParams = JSON.parse(reply);
          var url = '/?' + 'documentId=' + newParams.documentId + '&workspaceId=' + newParams.workspaceId + '&elementId=' + newParams.elementId;
          res.redirect(url);
        }
      });
    });

/// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

/// error handlers

// development error handler
// will print stacktrace

if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err,
      title: 'error'
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {},
    title: 'error'
  });
});


module.exports = app;