oleh-zaporozhets

import Storage from './storage';

enum Locals {
  ACCESS_TOKEN = 'access_token',
  REFRESH_TOKEN = 'refresh_token'
}

class Tokens extends Storage<Locals> {
  constructor() {
    super();

oleh-zaporozhets

interface IStorage {
  getItem(key: string): string | null;
  setItem(key: string, value: string): void;
  removeItem(key: string): void;
}

export default abstract class Storage<T extends string> {
  private readonly storage: IStorage;

  public constructor(getStorage = (): IStorage => window.localStorage) {

oleh-zaporozhets

protected clearItem(key: T): void {
  this.storage.removeItem(key);
}

protected clearItems(keys: T[]): void {
  keys.forEach((key) => this.clearItem(key));
}

oleh-zaporozhets

protected set(key: T, value: string): void {
  this.storage.setItem(key, value);
}

oleh-zaporozhets

protected get(key: T): string | null {
  return this.storage.getItem(key);
}

oleh-zaporozhets

abstract class Storage<T extends string> {
  private readonly storage: IStorage;

  public constructor(getStorage = (): IStorage => window.localStorage) {
    this.storage = getStorage();
  }
}

oleh-zaporozhets

abstract class Storage<T extends string> {
	private readonly storage: IStorage;
}

oleh-zaporozhets

interface IStorage {
  getItem(key: string): string | null;
  setItem(key: string, value: string): void;
  removeItem(key: string): void;
}

oleh-zaporozhets

abstract class Storage<T extends string> {}

oleh-zaporozhets

class MainApi extends HttpClient {
  private static classInstance?: MainApi;

  private constructor() {
    super('https://api.awesome-site.com');
  }

  public static getInstance() {
    if (!this.classInstance) {
      this.classInstance = new MainApi();