155 lines
3.6 KiB
JavaScript
155 lines
3.6 KiB
JavaScript
/**
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* 视频缓存管理工具
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* 用于管理本地视频缓存，清理过期或超出限制的缓存
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*/
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const MAX_CACHE_SIZE = 50; // 最多缓存50个视频
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const MAX_CACHE_AGE = 30 * 24 * 60 * 60 * 1000; // 30天过期
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/**
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* 清理过期的视频缓存
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*/
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export function cleanExpiredCache() {
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try {
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const cacheInfo = uni.getStorageSync('video_cache_info') || {};
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const now = Date.now();
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let cleaned = 0;
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Object.keys(cacheInfo).forEach(key => {
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const cache = cacheInfo[key];
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// 检查是否过期
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if (now - cache.time > MAX_CACHE_AGE) {
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console.log('[CacheManager] 清理过期缓存:', cache.url);
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// 删除文件
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uni.removeSavedFile({
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filePath: cache.path,
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success: () => {
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console.log('[CacheManager] 文件已删除:', cache.path);
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}
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});
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// 删除映射
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uni.removeStorageSync(key);
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delete cacheInfo[key];
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cleaned++;
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}
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});
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// 更新缓存信息
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if (cleaned > 0) {
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uni.setStorageSync('video_cache_info', cacheInfo);
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console.log(`[CacheManager] 已清理 ${cleaned} 个过期缓存`);
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}
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return cleaned;
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} catch (e) {
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console.error('[CacheManager] 清理缓存失败:', e);
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return 0;
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}
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}
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/**
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* 清理最旧的缓存（当缓存数量超过限制时）
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*/
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export function cleanOldestCache() {
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try {
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const cacheInfo = uni.getStorageSync('video_cache_info') || {};
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const cacheList = Object.keys(cacheInfo).map(key => ({
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key,
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...cacheInfo[key]
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}));
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// 如果缓存数量未超过限制，不需要清理
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if (cacheList.length <= MAX_CACHE_SIZE) {
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return 0;
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}
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// 按时间排序，删除最旧的
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cacheList.sort((a, b) => a.time - b.time);
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const toDelete = cacheList.length - MAX_CACHE_SIZE;
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let cleaned = 0;
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for (let i = 0; i < toDelete; i++) {
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const cache = cacheList[i];
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console.log('[CacheManager] 清理旧缓存:', cache.url);
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// 删除文件
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uni.removeSavedFile({
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filePath: cache.path,
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success: () => {
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console.log('[CacheManager] 文件已删除:', cache.path);
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}
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});
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// 删除映射
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uni.removeStorageSync(cache.key);
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delete cacheInfo[cache.key];
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cleaned++;
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}
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// 更新缓存信息
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if (cleaned > 0) {
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uni.setStorageSync('video_cache_info', cacheInfo);
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console.log(`[CacheManager] 已清理 ${cleaned} 个旧缓存`);
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}
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return cleaned;
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} catch (e) {
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console.error('[CacheManager] 清理缓存失败:', e);
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return 0;
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}
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}
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/**
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* 获取缓存统计信息
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*/
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export function getCacheStats() {
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try {
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const cacheInfo = uni.getStorageSync('video_cache_info') || {};
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const cacheList = Object.keys(cacheInfo);
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return {
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count: cacheList.length,
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maxCount: MAX_CACHE_SIZE,
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maxAge: MAX_CACHE_AGE
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};
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} catch (e) {
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console.error('[CacheManager] 获取缓存统计失败:', e);
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return {
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count: 0,
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maxCount: MAX_CACHE_SIZE,
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maxAge: MAX_CACHE_AGE
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};
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}
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}
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/**
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* 清空所有视频缓存
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*/
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export function clearAllCache() {
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try {
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const cacheInfo = uni.getStorageSync('video_cache_info') || {};
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let cleaned = 0;
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Object.keys(cacheInfo).forEach(key => {
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const cache = cacheInfo[key];
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// 删除文件
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uni.removeSavedFile({
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filePath: cache.path,
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success: () => {
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console.log('[CacheManager] 文件已删除:', cache.path);
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}
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});
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// 删除映射
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uni.removeStorageSync(key);
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cleaned++;
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});
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// 清空缓存信息
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uni.removeStorageSync('video_cache_info');
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console.log(`[CacheManager] 已清空所有缓存，共 ${cleaned} 个`);
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return cleaned;
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} catch (e) {
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console.error('[CacheManager] 清空缓存失败:', e);
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return 0;
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}
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}
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