statics.js

var statics = {};
var jwt = require('jsonwebtoken');
var appSec = "Israeeltumharamebehnkochodon";
statics.appSecret = appSec;

statics.authenticateMiddleWare = function (req, res, next) {
  var token = req.body.token || req.query.token || req.headers['x-access-token'];
  if (token) {
    jwt.verify(token, appSec, function(err, decoded) {      
      if (err) {
        return res.json({ success: false, message: 'Failed to authenticate token.' });    
      } else {
        req.decoded = decoded.user;    
        next();
      }
    });
  } else {
    return res.status(403).send({ 
        success: false, 
        message: 'No token provided.' 
    });
  }
};

statics.getToken = function(email){
  return jwt.sign({user: email}, appSec, {
              expiresIn : 60*60*24*100
        });
};

statics.getDistanceFromLatLonInKm = function(lat1,lon1,lat2,lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = deg2rad(lat2-lat1);  // deg2rad below
  var dLon = deg2rad(lon2-lon1); 
  var a = 
    Math.sin(dLat/2) * Math.sin(dLat/2) +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 
    Math.sin(dLon/2) * Math.sin(dLon/2)
    ; 
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
  var d = R * c; // Distance in km
  return d;
}

function deg2rad(deg) {
  return deg * (Math.PI/180)
}
module.exports = statics;