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
 11var pageSize = config.pageSize;
 12
 13exports.signup = function (req, res) {
 14    var user = new userModel({
 15        username: req.body.username,
 16        password: crypto.createHash('sha256').update(req.body.password).digest('base64'),
 17        description: req.body.description,
 18        email: req.body.email
 19    });
 20
 21    user.save(function (err, user) {
 22        if (err) return res.status(500).send(err.message);
 23        //res.status(200).jsonp(user); en comptes de retoranr la data del signup, fem el login directament
 24        console.log("signup fet correctament, redirigint al login internament automàtic");
 25        exports.login(req, res);
 26    });
 27};
 28
 29
 30exports.login = function (req, res) {
 31    userModel.findOne({
 32        email: req.body.email
 33    })
 34    .select('+password')
 35    .exec(function (err, user) {
 36        if (err) throw err;
 37        if (!user) {
 38            res.json({success: false, message: 'Authentication failed. User not found.'});
 39        } else if (user) {
 40            req.body.password = crypto.createHash('sha256').update(req.body.password).digest('base64');
 41            if (user.password != req.body.password) {
 42                res.json({success: false, message: 'Authentication failed. Wrong password.'});
 43            } else {
 44                var indexToken = -1;
 45                for (var i = 0; i < user.tokens.length; i++) {
 46                    if (user.tokens[i].userAgent == req.body.userAgent) {
 47                        indexToken = JSON.parse(JSON.stringify(i));//stringify i parse pq es faci una còpia de la variable i, enlloc de una referència
 48                    }
 49                }
 50                console.log(indexToken);
 51                if (indexToken == -1) {//userAgent no exist
 52                    var tokenGenerated = jwt.sign({foo: 'bar'}, app.get('superSecret'), {
 53                        //  expiresIn: 86400 // expires in 24 hours
 54                    });
 55                    var newToken = {
 56                        userAgent: req.body.userAgent,
 57                        token: tokenGenerated,
 58                        os: req.body.os,
 59                        browser: req.body.browser,
 60                        device: req.body.device,
 61                        os_version: req.body.os_version,
 62                        browser_version: req.body.browser_version,
 63                        ip: req.body.ip,
 64                        lastLogin: Date()
 65                    };
 66                    user.tokens.push(newToken);
 67                } else {//userAgent already exist
 68                    user.tokens[indexToken].token = "";
 69                    var tokenGenerated = jwt.sign({foo: 'bar'}, app.get('superSecret'), {
 70                        //  expiresIn: 86400 // expires in 24 hours
 71                    });
 72                    user.tokens[indexToken].token = tokenGenerated;
 73                    user.tokens[indexToken].ip = req.body.ip;
 74                    user.tokens[indexToken].lastLogin = Date();
 75                }
 76                user.save(function (err, user) {
 77                    if (err) return res.send(500, err.message);
 78                    // return the information including token as JSON
 79                    user.password = "";
 80                    res.json({
 81                        user: user,
 82                        success: true,
 83                        message: 'Enjoy your token!',
 84                        token: tokenGenerated
 85                    });
 86                });
 87            }
 88        }
 89    });
 90};
 91
 92
 93exports.getAllUsers = function(req, res) {
 94    userModel.find()
 95        .limit(Number(req.query.pageSize))
 96        .skip(pageSize * Number(req.query.page))
 97        .exec(function (err, users) {
 98            if (err) return res.send(500, err.message);
 99            res.status(200).jsonp(users);
100        });
101};
102
103exports.getUserById = function (req, res) {
104    userModel.findOne({_id: req.params.userid})
105    .lean()
106    .populate('events', 'title description img date')
107    .exec(function (err, user) {
108        if (err) return res.send(500, err.message);
109        if (!user) {
110            res.json({success: false, message: 'User not found.'});
111        } else if (user) {
112
113            res.status(200).jsonp(user);
114        }
115    });
116};