app.post("/donors/profile/edit",isLoggedIn,(req,res)=>{
if(req.user.validPassword(req.body.currentPassword)) {
    upload(req, res, function (err) {
        if (err) {
            console.log(req.body);
            let date = new Date();
            let currentYear = date.getFullYear();
            req.flash('updateMessage', 'Only image files are allowed.')
            res.render("profile_edit_donor",{
                user: req.user,
                message: req.flash('updateMessage'),
                currentYear: currentYear
            });
          return
        }
        let user = req.user;
        let dob = new Date(req.body.DOBYear + "/" + req.body.DOBMonth + "/" + req.body.DOBDay);
        user.credentials.email    = req.body.email.trim();
        user.credentials.password = user.generateHash(req.body.newPassword);
        user.profilePicturePath = typeof req.file != "undefined" ? `/images/${req.file.filename}` : req.user.profilePicturePath;
        user.gender = req.body.gender;
        user.firstName = req.body.firstName;
        user.lastName  = req.body.lastName;
        user.bloodGroup = req.body.bloodGroup;
        user.dateOfBirth = dob;
        user.mobileNumber = req.body.mobileNumber;
        user.save();
        res.redirect("/donors/profile");
      })
} else {
    let date = new Date();
    let currentYear = date.getFullYear();
    req.flash('updateMessage', 'Passwords do not match')
    res.render("profile_edit_donor",{
        user: req.user,
        message: req.flash('updateMessage'),
        currentYear: currentYear
    });
}

const storage = multer.diskStorage({
destination: './public/images/',
filename: function(req, file, cb){
    cb(null,file.fieldname + '-' + req.user.credentials.email +
    path.extname(file.originalname));
 }
 });

const upload = multer({
    storage: storage,
    limits:{fileSize: 1000000},
    fileFilter: function(req, file, cb){
    checkFileType(file, cb);
  }
  }).any();

  function checkFileType(file, cb){
     const filetypes = /jpeg|jpg|png|gif/;
     const extname =
     filetypes.test(path.extname(file.originalname).toLowerCase());
     const mimetype = filetypes.test(file.mimetype);

     if(mimetype && extname){
        return cb(null,true);
     } else {
       cb('Error: Images Only!');
     }
   }