1var jwt = require('jsonwebtoken'); // used to create, sign, and verify tokens
  2var express = require("express");
  3var app = express();
  4var config = require('../config'); // get our config file
  5app.set('superSecret', config.secret); // secret variable
  6var crypto = require('crypto');
  7var mongoose = require('mongoose');
  8
  9var userModel = mongoose.model('userModel');
 10
 11exports.signup = function (req, res) {
 12    var user = new userModel({
 13        username: req.body.username,
 14        password: crypto.createHash('sha256').update(req.body.password).digest('base64'),
 15        description: req.body.description,
 16        email: req.body.email
 17    });
 18
 19    user.save(function (err, user) {
 20        if (err) return res.status(500).send(err.message);
 21        //res.status(200).jsonp(user); en comptes de retoranr la data del signup, fem el login directament
 22        console.log("signup fet correctament, redirigint al login internament automàtic");
 23        exports.login(req, res);
 24    });
 25};
 26
 27
 28exports.login = function (req, res) {
 29    userModel.findOne({
 30        email: req.body.email
 31    })
 32    .select('+password')
 33    .exec(function (err, user) {
 34        if (err) throw err;
 35        if (!user) {
 36            res.json({success: false, message: 'Authentication failed. User not found.'});
 37        } else if (user) {
 38            req.body.password = crypto.createHash('sha256').update(req.body.password).digest('base64');
 39            if (user.password != req.body.password) {
 40                res.json({success: false, message: 'Authentication failed. Wrong password.'});
 41            } else {
 42                var indexToken = -1;
 43                for (var i = 0; i < user.tokens.length; i++) {
 44                    if (user.tokens[i].userAgent == req.body.userAgent) {
 45                        indexToken = JSON.parse(JSON.stringify(i));//stringify i parse pq es faci una còpia de la variable i, enlloc de una referència
 46                    }
 47                }
 48                console.log(indexToken);
 49                if (indexToken == -1) {//userAgent no exist
 50                    var tokenGenerated = jwt.sign({foo: 'bar'}, app.get('superSecret'), {
 51                        //  expiresIn: 86400 // expires in 24 hours
 52                    });
 53                    var newToken = {
 54                        userAgent: req.body.userAgent,
 55                        token: tokenGenerated,
 56                        os: req.body.os,
 57                        browser: req.body.browser,
 58                        device: req.body.device,
 59                        os_version: req.body.os_version,
 60                        browser_version: req.body.browser_version,
 61                        ip: req.body.ip,
 62                        lastLogin: Date()
 63                    };
 64                    user.tokens.push(newToken);
 65                } else {//userAgent already exist
 66                    user.tokens[indexToken].token = "";
 67                    var tokenGenerated = jwt.sign({foo: 'bar'}, app.get('superSecret'), {
 68                        //  expiresIn: 86400 // expires in 24 hours
 69                    });
 70                    user.tokens[indexToken].token = tokenGenerated;
 71                    user.tokens[indexToken].ip = req.body.ip;
 72                    user.tokens[indexToken].lastLogin = Date();
 73                }
 74                user.save(function (err, user) {
 75                    if (err) return res.send(500, err.message);
 76                    // return the information including token as JSON
 77                    user.password = "";
 78                    res.json({
 79                        user: user,
 80                        success: true,
 81                        message: 'Enjoy your token!',
 82                        token: tokenGenerated
 83                    });
 84                });
 85            }
 86        }
 87    });
 88};
 89
 90
 91exports.getAllUsers = function(req, res) {
 92    userModel.find()
 93        .limit(Number(req.query.pageSize))
 94        .skip(Number(req.query.pageSize) * Number(req.query.page))
 95        .exec(function (err, users) {
 96            if (err) return res.send(500, err.message);
 97            res.status(200).jsonp(users);
 98        });
 99};
100
101exports.getUserById = function (req, res) {
102    userModel.findOne({_id: req.params.userid})
103    .lean()
104    .populate('events', 'title description img date')
105    .exec(function (err, user) {
106        if (err) return res.send(500, err.message);
107        if (!user) {
108            res.json({success: false, message: 'User not found.'});
109        } else if (user) {
110
111            res.status(200).jsonp(user);
112        }
113    });
114};