Wallet/js/plugins/LocalStorage.js

'use strict';
var _ = require('lodash');
var preconditions = require('preconditions').singleton();

function LocalStorage() {
  this.type = 'DB';

  preconditions.checkState(typeof localStorage !== 'undefined',
                           'localstorage not available, cannot run plugin');
};

LocalStorage.prototype.init = function() {
};

LocalStorage.prototype.setCredentials = function(email, password, opts) {
  this.email = email;
  this.password = password;
};

LocalStorage.prototype.getItem = function(k,cb) {
  return cb(null, localStorage.getItem(k));
};

/**
 * Same as setItem, but fails if an item already exists
 */
LocalStorage.prototype.createItem = function(name, value, callback) {
  if (localStorage.getItem(name)) {
    return callback('EEXISTS');
  }
  return this.setItem(name, value, callback);
};

LocalStorage.prototype.setItem = function(k,v,cb) {
  localStorage.setItem(k,v);
  return cb();
};

LocalStorage.prototype.removeItem = function(k,cb) { 
  localStorage.removeItem(k);
  return cb();
};

LocalStorage.prototype.clear = function(cb) { 
  localStorage.clear();
  return cb();
};

module.exports = LocalStorage;