app.js

var express = require('express');
var expressSession = require('express-session');
var stylus = require('stylus');
var nib = require('nib');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var multer          =       require('multer');
var upload      =   multer({ dest: './public/images/userpicture/'});

// Mongo instance local passport
var mongoose = require('mongoose');
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;
var mongo = require('mongodb');
var monk = require('monk');
var db = monk('localhost:27017/ghelp');
//defining that we are using route
var routes = require('./routes/index');
var users = require('./routes/users');


var app = express();
function compile(str, path) {
	  return stylus(str)
	    .set('filename', path)
	    .use(nib())
	}



// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade'); 

// uncomment after placing your favicon in /public
app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(expressSession({secret:'somesecrettokenhere',}));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(stylus.middleware(
		  { src: __dirname + '/public'
		  , compile: compile
		  }
		));
app.use(express.static(__dirname + '/public'));
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, '/public')));

//express session and passport
app.use(require('express-session')({
    secret: 'keyboard cat',
    resave: false,
    saveUninitialized: false
}));
app.use(passport.initialize());
app.use(passport.session());

// passport configuration for authentication
var Account = require('./models/account');
passport.use(new LocalStrategy(Account.authenticate()));
passport.serializeUser(Account.serializeUser());
passport.deserializeUser(Account.deserializeUser());

mongoose.connect('mongodb://localhost/ghelp');



// db accessible to our router
app.use(function(req,res,next){
    req.db = db;
    next();
});

app.use('/', routes);
app.use('/users', users);

//for uploading picture multer is used as below
app.use(multer({ dest: './public/images/userpicture/',
    rename: function (filename) {
        return filename;
    },
    onFileUploadStart: function (file) {
        console.log(file.originalname + ' is starting ...');
    },
    onFileUploadComplete: function (file) {
        console.log(file.fieldname + ' uploaded to  ' + file.path)
    }
}));
//GET method for picture upload page
app.get('/picture',function(req,res){
      res.render('setpicture', { user : req.user });
});

//POST method for saving the picture
app.post('/api/photo',function(req,res){
    upload(req,res,function(err) {
        if(err) {
            return res.end("Error uploading file.");
        }
        res.redirect("/home");
    });
});



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

app.use(function(req, res, next){
  res.status(404);

  // respond with html page
  if (req.accepts('html')) {
    res.render('404', { url: req.url });
    return;
  }
  });

// 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
    });
  });
}

// 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: {}
  });
}); 


module.exports = app;