var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var exphbs = require('express-handlebars');
var expressValidator = require('express-validator');
var flash = require('connect-flash');
var session = require('express-session');
var passport = require('passport');
var LocalStrategy = require('passport-local').Strategy;
var mongo = require('mongodb');
var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/elearn');
var db = mongoose.connection;
async = require('async');



var routes = require('./routes/index');
var users = require('./routes/users');
var classes = require('./routes/classes');
var students = require('./routes/students');
var instructors = require('./routes/instructors');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.engine('handlebars', exphbs({
  defaultLayout: 'layout'
}));
app.set('view engine', 'handlebars');


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

app.use(session({
  secret: 'secret',
  saveUninitialized: true,
  resave: true
}));

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


// Validator
app.use(expressValidator({
  errorFormatter: function(param, msg, value) {
      var namespace = param.split('.'),
      root    = namespace.shift(),
      formParam = root;

    while(namespace.length) {
      formParam += '[' + namespace.shift() + ']';
    }
    return {
      param : formParam,
      msg   : msg,
      value : value
    };
  }
}));

app.use(flash());

app.use(function(req, res, next){
  res.locals.messages = require('express-messages')(req, res);

  if(req.url == '/'){
    res.locals.isHome = true;
  }
  next();
});

app.get('*', function(req, res, next){
    res.locals.user = req.user || null;
    if(req.user){
      res.locals.usertype = req.user.type;
    }
    next();
});

app.use('/', routes);
app.use('/users', users);
app.use('/classes', classes);
app.use('/students', students);
app.use('/instructors', instructors);

// 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) {
    console.error(err.stack);
    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;

var express = require('express'); var router = express.Router(); var passport = require('passport'); var LocalStrategy = require('passport-local').Strategy;

var User = require('../models/user'); var Student = require('../models/student'); var Instructor = require('../models/instructor');

/* GET users listing. */ router.get('/signup', function(req, res, next) {   res.render('users/signup'); });

router.post('/signup', function(req, res, next) {

    // Get Form values
    var first_name        = req.body.first_name;
    var last_name         = req.body.last_name;
    var street_address    = req.body.street_address;
    var city              = req.body.city;
    var state             = req.body.state;
    var zip               = req.body.zip;
    var email             = req.body.email;
    var username          = req.body.username;
    var password          = req.body.password;
    var password2         = req.body.password2;
    var type              = req.body.type;

    // console.log('first_name ' + first_name);
    // console.log('last_name ' + last_name);
    // console.log('zip ' + zip);
    // console.log('email ' + email);
    //
    // console.log('username ' + username);
    // console.log('password1 ' + password);
    // console.log('password2 ' + password2);

    // Form Field Validation
    req.checkBody('first_name', 'First name field is required').notEmpty();
    req.checkBody('last_name', 'Last name field is required').notEmpty();
    req.checkBody('email', 'Email field is required').notEmpty();
    req.checkBody('email', 'Email must be a valid email address').isEmail();
    req.checkBody('username', 'Usrname field is required').notEmpty();
    req.checkBody('password', 'Password field is required').notEmpty();
    req.checkBody('password2', 'Passwords do not match').equals(req.body.password);

    var errors = req.validationErrors();

    if (errors){
          res.render('users/signup', {
              errors: errors,
              first_name: first_name,
              last_name: last_name,
              street_address: street_address,
              city: city,
              state: state,
              zip: zip,
              email: email,
              username: username,
              password: password,
              password2: password2
          });
    } else {

        var newUser = User({
          email: email,
          username: username,
          password: password,
          type: type
        });

        var newStudent = new Student({
            first_name: first_name,
            last_name: last_name,
            address: [{
                street_address: street_address,
                city: city,
                state: state,
                zip: zip
            }],
            email: email,
            username: username
        });

        var newInstructor = new Instructor({
            first_name: first_name,
            last_name: last_name,
            address: [{
                street_address: street_address,
                city: city,
                state: state,
                zip: zip
            }],
            email: email,
            username: username
        });

        if(type == 'student'){
            User.saveStudent(newUser, newStudent, function(err, user){
                console.log('Student created');
            });
        } else {
          User.saveInstructor(newUser, newInstructor, function(err, user){
              console.log('Instructor created');
          });
        }

        req.flash('success', 'User added');
        res.redirect('/');
    } });

passport.serializeUser(function(user, done){
    done(null, user._id); });

passport.deserializeUser(function(id, done){
    User.getUserById(id, function(err, user){
      done(err, user);
    }); });

module.exports = router;

<h2>Create An Account</h2>
<form id="regForm" method="post" action="/users/signup">

  <div>
    <label>Account Type</label>
    <select name="type">
      <option value="student">Student</option>
      <option value="instructor">instructor</option>
    </select>
  </div>

  <div>
    <label>First Name:</label>
    <input type="text" name="first_name" value="{{first_name}}">
  </div>

  <div>
    <label>Last Name:</label>
    <input type="text" name="last_name" value="{{last_name}}">
  </div>

  <div>
    <label>Street Address:</label>
    <input type="text" name="street_address" value="{{street_address}}">
  </div>

  <div>
    <label>City:</label>
    <input type="text" name="city" value="{{city}}">
  </div>

  <div>
    <label>State:</label>
    <input type="text" name="state" value="{{state}}">
  </div>

  <div>
    <label>Zip:</label>
    <input type="text" name="zip" value="{{zip}}">
  </div>

  <div>
    <label>Email Address:</label>
    <input type="text" name="email" value="{{email}}">
  </div>

  <div>
    <label>Username:</label>
    <input type="text" name="username" value="{{username}}">
  </div>

  <div>
    <label>Password:</label>
    <input type="password" name="password" value="{{password}}">
  </div>

  <div>
    <label>Password Confirm:</label>
    <input type="password" name="password2" value="{{password2}}">
  </div>

  <div>
    <input type="submit" value="Signup">
  </div>

</form>

var mongoose = require('mongoose');
var bcrypt   = require('bcryptjs');

// User Schema

var userSchema = mongoose.Schema({
  username: {
    type: String
  },
  email: {
    type: String
  },
  password:{
    type: String,
    bcrypt: true
  },
  type:{
    type: String
  }
});

var User =  module.exports = mongoose.model('User', userSchema);


// Fetch All Classes
module.exports.getUserById = function(id, callback){
    User.findById(id, callback);
};

// Fetch Single Class
module.exports.getUserByUsername = function(username, callback){
    var query = {username: username};
    User.findOne(query, callback);
};

// Save Student
module.exports.saveStudent = function(newUser, newStudent, callback){
    bcrypt.hash(newUser.password, 10, function(err, hash){
        if(err) throw err;

        newUser.password = hash;
        console.log('Student is being saved');
        async.parallel([newUser.save, newStudent.save], callback);
    });
};

// Save Instructor
module.exports.saveInstructor = function(newUser, newInstructor, callback){
    bcrypt.hash(newUser.password, 10, function(err, hash){
        if(err) throw err;

        newUser.password = hash;
        console.log('Instructor is being saved');
        async.parallel([newUser.save, newInstructor.save], callback);
    });
};

// comparePassword
module.exports.comparePassword = function(candidatePassword, hash, callback){
    bcrypt.compare(candidatePassword, hash, function(err, isMatch){
        if(err){
          throw err;
        }

        callback(null, isMatch);
    });
};