signal-desktop/ts/textsecure/Storage.ts

// tslint:disable no-default-export

import utils from './Helpers';

// Default implmentation working with localStorage
const localStorageImpl = {
  put(key: string, value: any) {
    if (value === undefined) {
      throw new Error('Tried to store undefined');
    }
    localStorage.setItem(`${key}`, utils.jsonThing(value));
  },

  get(key: string, defaultValue: any) {
    const value = localStorage.getItem(`${key}`);
    if (value === null) {
      return defaultValue;
    }
    return JSON.parse(value);
  },

  remove(key: string) {
    localStorage.removeItem(`${key}`);
  },
};

export interface StorageInterface {
  put(key: string, value: any): void | Promise<void>;
  get(key: string, defaultValue: any): any;
  remove(key: string): void | Promise<void>;
}

const Storage = {
  impl: localStorageImpl as StorageInterface,

  put(key: string, value: any) {
    return Storage.impl.put(key, value);
  },

  get(key: string, defaultValue: any) {
    return Storage.impl.get(key, defaultValue);
  },

  remove(key: string) {
    return Storage.impl.remove(key);
  },
};

export default Storage;