97 lines
2.8 KiB
Dart
97 lines
2.8 KiB
Dart
/// 缓存设置模型
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class CacheSettingsModel {
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/// 最大缓存大小（字节）
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final int maxCacheSize;
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/// 缓存过期时间（毫秒）
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final int cacheExpireDuration;
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/// 是否自动清理最旧文件
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final bool autoCleanOldFiles;
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CacheSettingsModel({
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this.maxCacheSize = 500 * 1024 * 1024, // 默认500MB
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this.cacheExpireDuration = 7 * 24 * 60 * 60 * 1000, // 默认7天
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this.autoCleanOldFiles = true,
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});
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factory CacheSettingsModel.fromJson(Map<String, dynamic> json) {
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return CacheSettingsModel(
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maxCacheSize: json['max_cache_size'] as int? ?? 500 * 1024 * 1024,
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cacheExpireDuration:
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json['cache_expire_duration'] as int? ?? 7 * 24 * 60 * 60 * 1000,
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autoCleanOldFiles: json['auto_clean_old_files'] as bool? ?? true,
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);
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}
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Map<String, dynamic> toJson() {
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return {
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'max_cache_size': maxCacheSize,
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'cache_expire_duration': cacheExpireDuration,
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'auto_clean_old_files': autoCleanOldFiles,
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};
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}
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/// 获取人类可读的最大缓存大小
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String get maxCacheSizeReadable {
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return _formatBytes(maxCacheSize);
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}
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/// 获取人类可读的缓存过期时间
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String get cacheExpireDurationReadable {
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final days = cacheExpireDuration ~/ (24 * 60 * 60 * 1000);
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if (days > 0) {
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return '$days天';
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}
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final hours = cacheExpireDuration ~/ (60 * 60 * 1000);
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if (hours > 0) {
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return '$hours小时';
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}
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final minutes = cacheExpireDuration ~/ (60 * 1000);
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return '$minutes分钟';
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}
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String _formatBytes(int bytes) {
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if (bytes < 1024) {
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return '$bytes B';
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} else if (bytes < 1024 * 1024) {
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return '${(bytes / 1024).toStringAsFixed(1)} KB';
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} else if (bytes < 1024 * 1024 * 1024) {
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return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
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} else {
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return '${(bytes / (1024 * 1024 * 1024)).toStringAsFixed(1)} GB';
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}
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}
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/// 从MB创建
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static CacheSettingsModel fromMB(int maxCacheSizeMB) {
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return CacheSettingsModel(maxCacheSize: maxCacheSizeMB * 1024 * 1024);
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}
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/// 从天数创建
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static CacheSettingsModel fromDays(int days) {
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return CacheSettingsModel(
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cacheExpireDuration: days * 24 * 60 * 60 * 1000,
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);
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}
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/// 创建副本
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CacheSettingsModel copyWith({
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int? maxCacheSize,
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int? cacheExpireDuration,
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bool? autoCleanOldFiles,
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}) {
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return CacheSettingsModel(
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maxCacheSize: maxCacheSize ?? this.maxCacheSize,
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cacheExpireDuration: cacheExpireDuration ?? this.cacheExpireDuration,
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autoCleanOldFiles: autoCleanOldFiles ?? this.autoCleanOldFiles,
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);
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}
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/// 获取可用预设大小选项
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static List<int> get availableSizes => [100, 250, 500, 1000, 2000]; // MB
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/// 获取可用预设过期时间选项
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static List<int> get availableDurations => [1, 3, 7, 15, 30]; // 天
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}
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