54 lines
1.3 KiB
TypeScript
Executable File
54 lines
1.3 KiB
TypeScript
Executable File
/**
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* 用户ID管理工具
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* 为每个匿名用户生成永久userid并存储到localStorage
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*/
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const USER_ID_KEY = 'a_stock_tracker_user_id';
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/**
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* 获取或生成用户ID
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* 如果localStorage中已有则返回，否则生成新的UUID
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*/
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export function getUserId(): string {
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if (typeof window === 'undefined') {
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return '';
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}
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let userId = localStorage.getItem(USER_ID_KEY);
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if (!userId) {
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// 生成UUID v4
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userId = crypto.randomUUID ? crypto.randomUUID() : generateUUID();
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localStorage.setItem(USER_ID_KEY, userId);
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}
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return userId;
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}
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/**
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* 手动生成UUID v4（兼容不支持crypto.randomUUID的环境）
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*/
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function generateUUID(): string {
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return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
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const r = Math.random() * 16 | 0;
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const v = c === 'x' ? r : (r & 0x3 | 0x8);
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return v.toString(16);
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});
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}
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/**
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* 更新最后访问时间
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*/
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export function updateLastAccessed(collectionId: number): void {
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const key = `last_accessed_${collectionId}`;
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localStorage.setItem(key, new Date().toISOString());
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}
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/**
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* 获取最后访问时间
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*/
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export function getLastAccessed(collectionId: number): string | null {
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const key = `last_accessed_${collectionId}`;
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return localStorage.getItem(key);
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}
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