137 lines
4.1 KiB
Dart
137 lines
4.1 KiB
Dart
import 'dart:io';
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import 'package:flutter_cache_manager/flutter_cache_manager.dart';
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import 'package:path_provider/path_provider.dart';
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import 'package:path/path.dart' as p;
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typedef FileCacheManager = MediaCache;
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class MediaCache {
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late CacheManager _cacheManager;
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static FileCacheManager? _instance;
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static String temporaryPath = "";
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static const musicPath = "/music";
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static String soundPath = "";
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final String cacheKey;
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final Duration stalePeriod;
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final int maxNrOfCacheObjects;
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static String get videoCachePath => "$temporaryPath";
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static String get imageCachePath => "$temporaryPath";
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MediaCache._internal({
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required this.cacheKey,
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required this.stalePeriod,
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required this.maxNrOfCacheObjects,
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}) {
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_cacheManager = CacheManager(
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Config(
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cacheKey,
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stalePeriod: stalePeriod,
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maxNrOfCacheObjects: maxNrOfCacheObjects,
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),
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);
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}
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factory MediaCache.getInstance({
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String cacheKey = 'customCache',
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Duration stalePeriod = const Duration(days: 7),
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int maxNrOfCacheObjects = 100,
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}) {
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_instance ??= FileCacheManager._internal(
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cacheKey: cacheKey,
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stalePeriod: stalePeriod,
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maxNrOfCacheObjects: maxNrOfCacheObjects,
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);
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return _instance!;
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}
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Future<String> getFilePath() async {
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try {
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Directory directory = await getTemporaryDirectory();
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temporaryPath = p.join(directory.path, cacheKey);
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// 使用递归创建目录，更简洁
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await Directory(temporaryPath).create(recursive: true);
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await Directory("$temporaryPath/sound").create(recursive: true);
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await Directory("$temporaryPath/$musicPath").create(recursive: true);
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soundPath = "$temporaryPath/sound";
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print('语音文件夹路径: $soundPath');
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return temporaryPath;
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} catch (e) {
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print('目录创建失败: $e');
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rethrow; // 或者返回一个备用路径
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}
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}
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/// 下载或获取缓存文件
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/// [url] 文件网络地址
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/// [ignoreCache] 是否忽略缓存强制重新下载
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Future<File> getFile({
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required String url,
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bool ignoreCache = false,
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}) async {
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if (ignoreCache) {
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// 强制重新下载
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final fileInfo = await _cacheManager.downloadFile(url);
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return fileInfo.file;
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} else {
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// 优先从缓存获取
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final cacheFile = await _cacheManager.getSingleFile(url);
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return cacheFile;
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}
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}
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/// 获取缓存文件路径（如果不存在则返回 null）
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Future<String?> getCachedFilePath(String url) async {
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final fileInfo = await _cacheManager.getFileFromCache(url);
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return fileInfo?.file.path;
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}
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/// 清除指定文件的缓存
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Future<void> removeCachedFile(String url) async {
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await _cacheManager.removeFile(url);
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}
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/// 清空所有缓存
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Future<void> clearAllCache() async {
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await _cacheManager.emptyCache();
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}
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/// 获取缓存大小（字节）
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Future<int> getCacheSize() async {
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final directory = await getTemporaryDirectory();
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final cacheDir = Directory('${directory.path}/libCachedData');
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if (!await cacheDir.exists()) return 0;
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int totalSize = 0;
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await for (var file in cacheDir.list(recursive: true)) {
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if (file is File) {
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totalSize += await file.length();
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}
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}
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return totalSize;
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}
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Future<void> putFileFromFile(String cacheKey, File localFile) async {
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final cacheManager = DefaultCacheManager();
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try {
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// 1. 将本地文件添加到缓存
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await cacheManager.putFile(
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cacheKey, // 缓存键（唯一标识）
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localFile.readAsBytesSync(), // 文件字节数据
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fileExtension: localFile.path.split('.').last, // 文件扩展名
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);
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// 2. 验证文件已缓存
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final cachedFile = await cacheManager.getFileFromCache(cacheKey);
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if (cachedFile != null) {
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print('文件已成功添加到缓存: ${cachedFile.file.path}');
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}
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} catch (e) {
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print('添加文件到缓存失败: $e');
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}
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}
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} |