models-Passport.js

var bcrypt = require('bcrypt');

/**
 * Passport Model
 *
 * The Passport model handles associating authenticators with users. An authen-
 * ticator can be either local (password) or third-party (provider). A single
 * user can have multiple passports, allowing them to connect and use several
 * third-party strategies in optional conjunction with a password.
 *
 * Since an application will only need to authenticate a user once per session,
 * it makes sense to encapsulate the data specific to the authentication process
 * in a model of its own. This allows us to keep the session itself as light-
 * weight as possible as the application only needs to serialize and deserialize
 * the user, but not the authentication data, to and from the session.
 */
var Passport = {

  attributes: {

    // Required field: Protocol
    //
    // Defines the protocol to use for the passport. When employing the local
    // strategy, the protocol will be set to 'local'. When using a third-party
    // strategy, the protocol will be set to the standard used by the third-
    // party service (e.g. 'oauth', 'oauth2', 'openid').
    protocol: { type: 'alphanumeric', required: true },

    // Local field: Password
    //
    // When the local strategy is employed, a password will be used as the
    // means of authentication along with either a username or an email.
    password: { type: 'string', minLength: 8 },

    // Provider fields: Provider, identifer and tokens
    //
    // "provider" is the name of the third-party auth service in all lowercase
    // (e.g. 'github', 'facebook') whereas "identifier" is a provider-specific
    // key, typically an ID. These two fields are used as the main means of
    // identifying a passport and tying it to a local user.
    //
    // The "tokens" field is a JSON object used in the case of the OAuth stan-
    // dards. When using OAuth 1.0, a `token` as well as a `tokenSecret` will
    // be issued by the provider. In the case of OAuth 2.0, an `accessToken`
    // and a `refreshToken` will be issued.
    provider   : { type: 'alphanumericdashed' },
    identifier : { type: 'string' },
    tokens     : { type: 'json' },

    // Associations
    //
    // Associate every passport with one, and only one, user. This requires an
    // adapter compatible with associations.
    //
    // For more information on associations in Waterline, check out:
    // https://github.com/balderdashy/waterline
    user: { model: 'User', required: true },

    /**
     * Validate password used by the local strategy.
     *
     * @param {string}   password The password to validate
     * @param {Function} next
     */
    validatePassword: function (password, next) {
      bcrypt.compare(password, this.password, next);
    }

  },

  /**
   * Callback to be run before creating a Passport.
   *
   * @param {Object}   passport The soon-to-be-created Passport
   * @param {Function} next
   */
  beforeCreate: function (passport, next) {
    if (passport.hasOwnProperty('password')) {
      bcrypt.hash(passport.password, 10, function (err, hash) {
        passport.password = hash;
        next(err, passport);
      });
    } else {
      next(null, passport);
    }
  },

  /**
   * Callback to be run before updating a Passport.
   *
   * @param {Object}   passport Values to be updated
   * @param {Function} next
   */
  beforeUpdate: function (passport, next) {
    if (passport.hasOwnProperty('password')) {
      bcrypt.hash(passport.password, 10, function (err, hash) {
        passport.password = hash;
        next(err, passport);
      });
    } else {
      next(null, passport);
    }
  }
};

module.exports = Passport;