77 lines
1.9 KiB
TypeScript
77 lines
1.9 KiB
TypeScript
import { fetchApi } from './server-api-util';
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// 全局缓存对象
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const cache: Record<string, { data: any; timestamp: number }> = {};
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const CACHE_DURATION = 5 * 60 * 1000; // 5分钟缓存时间
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/**
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* 预取数据并缓存
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* @param url API地址
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* @param forceRefresh 是否强制刷新缓存
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* @returns 返回Promise，解析为获取到的数据
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*/
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export const prefetchData = async <T>(url: string, forceRefresh = false): Promise<T> => {
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const now = Date.now();
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// 检查缓存是否存在且未过期
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if (!forceRefresh && cache[url] && (now - cache[url].timestamp < CACHE_DURATION)) {
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return cache[url].data as T;
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}
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try {
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const data = await fetchApi<T>(url);
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// 缓存数据
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cache[url] = {
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data,
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timestamp: now,
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};
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return data;
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} catch (error) {
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console.error(`Prefetch failed for ${url}:`, error);
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// 如果缓存中有旧数据，返回旧数据
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if (cache[url]) {
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return cache[url].data as T;
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}
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throw error;
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}
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};
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/**
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* 预取聊天列表
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*/
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export const prefetchChats = async () => {
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return prefetchData<Array<{ session_id: string; title: string; latest_message?: any }>>('/chats');
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};
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/**
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* 预取单个聊天详情
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*/
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export const prefetchChatDetail = async (sessionId: string) => {
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return prefetchData(`/chats/${sessionId}/message-history`);
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};
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/**
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* 清除指定URL的缓存
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*/
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export const clearCache = (url?: string) => {
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if (url) {
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delete cache[url];
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} else {
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// 清除所有缓存
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Object.keys(cache).forEach(key => {
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delete cache[key];
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});
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}
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};
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/**
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* 获取缓存数据
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*/
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export const getCachedData = <T>(url: string): T | null => {
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const cached = cache[url];
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if (cached && (Date.now() - cached.timestamp < CACHE_DURATION)) {
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return cached.data as T;
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}
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return null;
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};
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