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        shortDescription: req.body.shortDescription,
 18        description: req.body.description,
 19        email: req.body.email
 20    });
 21
 22    user.save(function (err, user) {
 23        if (err) return res.status(500).send(err.message);
 24        //res.status(200).jsonp(user); en comptes de retoranr la data del signup, fem el login directament
 25        console.log("signup fet correctament, redirigint al login internament automàtic");
 26        exports.login(req, res);
 27    });
 28};
 29
 30
 31exports.login = function (req, res) {
 32    userModel.findOne({
 33        email: req.body.email
 34    })
 35    .select('+password')
 36    .exec(function (err, user) {
 37        if (err) throw err;
 38        if (!user) {
 39            res.json({success: false, message: 'Authentication failed. User not found.'});
 40        } else if (user) {
 41            req.body.password = crypto.createHash('sha256').update(req.body.password).digest('base64');
 42            if (user.password != req.body.password) {
 43                res.json({success: false, message: 'Authentication failed. Wrong password.'});
 44            } else {
 45                var indexToken = -1;
 46                for (var i = 0; i < user.tokens.length; i++) {
 47                    if (user.tokens[i].userAgent == req.body.userAgent) {
 48                        indexToken = JSON.parse(JSON.stringify(i));//stringify i parse pq es faci una còpia de la variable i, enlloc de una referència
 49                    }
 50                }
 51                console.log(indexToken);
 52                if (indexToken == -1) {//userAgent no exist
 53                    var tokenGenerated = jwt.sign({foo: 'bar'}, app.get('superSecret'), {
 54                        //  expiresIn: 86400 // expires in 24 hours
 55                    });
 56                    var newToken = {
 57                        userAgent: req.body.userAgent,
 58                        token: tokenGenerated,
 59                        os: req.body.os,
 60                        browser: req.body.browser,
 61                        device: req.body.device,
 62                        os_version: req.body.os_version,
 63                        browser_version: req.body.browser_version,
 64                        ip: req.body.ip,
 65                        lastLogin: Date()
 66                    };
 67                    user.tokens.push(newToken);
 68                } else {//userAgent already exist
 69                    user.tokens[indexToken].token = "";
 70                    var tokenGenerated = jwt.sign({foo: 'bar'}, app.get('superSecret'), {
 71                        //  expiresIn: 86400 // expires in 24 hours
 72                    });
 73                    user.tokens[indexToken].token = tokenGenerated;
 74                    user.tokens[indexToken].ip = req.body.ip;
 75                    user.tokens[indexToken].lastLogin = Date();
 76                }
 77                user.save(function (err, user) {
 78                    if (err) return res.send(500, err.message);
 79                    // return the information including token as JSON
 80                    user.password = "";
 81                    res.json({
 82                        user: user,
 83                        success: true,
 84                        message: 'Enjoy your token!',
 85                        token: tokenGenerated
 86                    });
 87                });
 88            }
 89        }
 90    });
 91};
 92
 93
 94exports.getAllUsers = function(req, res) {
 95    userModel.find()
 96        .limit(Number(req.query.pageSize))
 97        .skip(pageSize * Number(req.query.page))
 98        .exec(function (err, users) {
 99            if (err) return res.send(500, err.message);
100            res.status(200).jsonp(users);
101        });
102};
103
104exports.getUserById = function (req, res) {
105    userModel.findOne({_id: req.params.userid})
106    .lean()
107    .populate('events', 'title shortDescription description img date')
108    .exec(function (err, user) {
109        if (err) return res.send(500, err.message);
110        if (!user) {
111            res.json({success: false, message: 'User not found.'});
112        } else if (user) {
113
114            res.status(200).jsonp(user);
115        }
116    });
117};