Image uploading, profile picture.

app.js

const updateProfile = async (req, res) => {
  const userId = req.params.id;

  if (req.files && Object.keys(req.files).length === 0) {
    return res.status(400).send('No files were uploaded');
  }
  // check if user has uploaded profile picture.
  let profilePicture = req.files ? req.files.profilePicture : {};

  const user = await User.findById(userId);

  let customeUserObject = {
    email: req.body.email || user.local.email,
    firstName: req.body.firstName || user.local.firstName,
    lastName: req.body.lastName || user.local.lastName,
    profilePicture: profilePicture || user.local.profilePicture,
    phone: req.body.phone || user.local.phone,
    favorites: user.local.favorites,
    password: user.local.password
  };

  const updatedUser = {
    method: 'local',
    local: {
      ...customeUserObject
    }
  };

  User.findByIdAndUpdate(userId, updatedUser, { new: true })
    .then(user => {
      res.status(200).send({
        ...user
        // profilePicture: user.profilePicture.data
      });
    })
    .catch(() => {
      res.status(500).send({
        message: 'Some problem occurred at the server side.'
      });
    });
};