import { KeyValueStorage } from "./basic.ts";

/**
 * Key-value store using localStorage
 */
export class LocalStorage implements KeyValueStorage {
  constructor() {
    if (typeof localStorage == "undefined" || !localStorage) {
      throw new Error("localStorage not available");
    }
  }

  async get(key: string): Promise<string | null> {
    return localStorage.getItem(key);
  }

  async set(key: string, value: string | null): Promise<void> {
    if (value === null) {
      localStorage.removeItem(key);
    } else {
      localStorage.setItem(key, value);
    }
  }
}