golos-lib-js/lib/auth/multiSession/MultiSession.js

Golos-js the JavaScript library with API for GOLOS blockchain

"use strict";

const MultiSessionData = require('./MultiSessionData');
const MultiSessionTempData = require('./MultiSessionTempData');
class MultiSession {
  constructor() {
    let key = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 'multi_session';
    this.key = key;
  }
  ensure() {
    if (typeof localStorage === 'undefined' || typeof sessionStorage === 'undefined') throw new Error('Browser should support localStorage and sessionStorage.');
  }
  load() {
    this.ensure();
    const obj = {
      key: this.key,
      currentName: '',
      accounts: {}
    };
    let data = localStorage.getItem(this.key);
    if (data) {
      try {
        data = new Buffer(data, 'hex').toString();
        data = JSON.parse(data);
        if (data.currentName) obj.currentName = data.currentName;
        if (data.accounts) obj.accounts = data.accounts;
      } catch (err) {
        console.warn('MultiSession.load', err);
      }
    }
    return new MultiSessionData(obj);
  }
  loadTemp() {
    this.ensure();
    const obj = {
      key: this.key,
      accounts: {}
    };
    let data = sessionStorage.getItem(this.key);
    if (data) {
      try {
        data = new Buffer(data, 'hex').toString();
        data = JSON.parse(data);
        if (data.accounts) obj.accounts = data.accounts;
      } catch (err) {
        console.warn('MultiSession.loadTemp', err);
      }
    }
    return new MultiSessionTempData(obj);
  }
  clearExpired() {
    this.ensure();
    return this.loadTemp().clearExpired(...arguments).save();
  }
  logout(account) {
    let newCurrent = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : undefined;
    this.loadTemp().logout(account).save();
    return this.load().logout(account, newCurrent).save();
  }
  clear() {
    this.loadTemp().clear().save();
    return this.load().clear().save();
  }
}
module.exports = MultiSession;