etherpad-lite/src/node/db/SessionStore.js

/*
 * Stores session data in the database
 * Source; https://github.com/edy-b/SciFlowWriter/blob/develop/available_plugins/ep_sciflowwriter/db/DirtyStore.js
 * This is not used for authors that are created via the API at current
 *
 * RPB: this module was not migrated to Promises, because it is only used via
 *      express-session, which can't actually use promises anyway.
 */

const Store = require('ep_etherpad-lite/node_modules/express-session').Store;
const db = require('ep_etherpad-lite/node/db/DB').db;
const log4js = require('ep_etherpad-lite/node_modules/log4js');

const logger = log4js.getLogger('SessionStore');

module.exports = class SessionStore extends Store {
  get(sid, fn) {
    logger.debug('GET ' + sid);
    db.get('sessionstorage:' + sid, (err, sess) => {
      if (sess) {
        sess.cookie.expires = ('string' == typeof sess.cookie.expires
                               ? new Date(sess.cookie.expires) : sess.cookie.expires);
        if (!sess.cookie.expires || new Date() < sess.cookie.expires) {
          fn(null, sess);
        } else {
          this.destroy(sid, fn);
        }
      } else {
        fn();
      }
    });
  }

  set(sid, sess, fn) {
    logger.debug('SET ' + sid);
    db.set('sessionstorage:' + sid, sess);
    if (fn) process.nextTick(fn);
  }

  destroy(sid, fn) {
    logger.debug('DESTROY ' + sid);
    db.remove('sessionstorage:' + sid);
    if (fn) process.nextTick(fn);
  }
};