130 lines
2.4 KiB
TypeScript
130 lines
2.4 KiB
TypeScript
export default class Storage {
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/**
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* 获取为布尔值
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*
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* @param key 键
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* @returns 布尔值
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*/
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public static is(key: string): boolean {
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return this.getString(key) === "true";
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}
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/**
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* 获取为布尔值并取反
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*
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* @param key 键
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* @returns 布尔值
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*/
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public static not(key: string): boolean {
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return !this.is(key);
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}
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/**
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* 读取为指定对象
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*
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* @template T 对象类型
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* @param key 键
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* @returns {T | undefined} 返回对象
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*/
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public static getObject<T>(key: string): T {
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if (this.has(key)) {
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return this.getJSON(key) as T;
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}
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throw Error(`not found ${key}`);
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}
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/**
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* 获取值，如果没有则储存并使用默认值
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*
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* @template T 默认值类型
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* @param key 键
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* @param def 默认值
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* @return {T} 对象
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*/
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public static getDefault<T>(key: string, def: T): T {
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if (this.has(key)) {
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return this.getJSON(key) as T;
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}
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this.setObject(key, def);
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return def;
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}
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/**
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* 获取为 JSON
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*
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* @param key 键
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* @returns JSON 对象
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*/
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public static getJSON(key: string) {
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return JSON.parse(this.getString(key));
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}
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/**
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* 获取为字符串（其他获取方式一般经过这个方法，找不到配置或配置值无效时会抛错）
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*
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* @param key 键
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* @returns 字符串
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*/
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public static getString(key: string): string {
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const value = localStorage.getItem(key);
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if (value) {
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return value;
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}
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throw new Error(`not found: ${key}, ${value}`);
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}
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/**
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* 是否存在某配置
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*
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* @param key 键
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* @returns true 为存在
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*/
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public static has(key: string): boolean {
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return localStorage.getItem(key) !== undefined && localStorage.getItem(key) !== null;
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}
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/**
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* 设置值
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*
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* @param key 键
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* @param value 值
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*/
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public static setObject(key: string, value: any) {
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if (value instanceof Object || value instanceof Array) {
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this.setJSON(key, value);
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} else {
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this.setString(key, value);
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}
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}
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/**
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* 设置 JSON 值
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*
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* @param key 键
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* @param json JSON 字符串
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*/
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public static setJSON(key: string, json: any) {
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localStorage.setItem(key, JSON.stringify(json));
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}
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/**
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* 设置值
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*
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* @param key 键
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* @param value 值
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*/
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public static setString(key: string, value: any) {
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localStorage.setItem(key, value);
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}
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/**
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* 移除属性
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*
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* @param key 键
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*/
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public static remove(key: string) {
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localStorage.removeItem(key);
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}
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}
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