// Tools for encrypting and decrypting passwords.
// Basically promise-friendly wrappers for bcrypt.
var bcrypt = require('bcryptjs');

try {
  bcrypt = require('bcrypt');
} catch(e) { /* */ }

// Returns a promise for a hashed password string.
function hash(password) {
  return bcrypt.hash(password, 10);
}

// Returns a promise for whether this password compares to equal this
// hashed password.
function compare(password, hashedPassword) {
  // Cannot bcrypt compare when one is undefined
  if (!password || !hashedPassword) {
    return Promise.resolve(false);
  }
  return bcrypt.compare(password, hashedPassword);
}

module.exports = {
  hash: hash,
  compare: compare
};