Method load

src/stateful.js:114–128

* Loads data from the storage and inits database connection. * This method must be executed before using `save` or `dispose`. * * @author Roman Pushkin (roman.pushkin@gmail.com) * @date 2016-05-20 * @version 1.1 * @since 0.1.0 * @return {Promise} promise that resol

()

     * @return {Promise} promise that resolves when data has been loaded.
     */
    load() {
      this.init();
      return new Promise((resolve) => {
        this.db = firebaseDB.config().ref(this.firebasePath);
        this.db.on('value', (snapshot) => {
          const value = snapshot.val();

          if (value) {
            Object.assign(this.state, value);
          }

          resolve(this);
        });
      });
    }

    /**
     * Updates the storage with current state. Will only overwrite the