gistfile1.txt

co.wrap(function*() {
    try {
      var salt = yield bcrypt.genSalt();
      var hash = yield bcrypt.hash(this.password, salt);
      this.password = hash;
      done();
    }
    catch (err) {
      done(err);
    }
  }).call(this).then(done);
});

/**
 * Methods
 */
UserSchema.methods.comparePassword = function *(candidatePassword) {
  return yield bcrypt.compare(candidatePassword, this.password);
};

/**
 * Statics
 */

UserSchema.statics.passwordMatches = function *(username, password) {
  var user = yield this.findOne({ 'username': username.toLowerCase() }).exec();
  if (!user) throw new Error('User not found');

  if (yield user.comparePassword(password)) {
    return user;
  }

  throw new Error('Password does not match');
};