二次开发源码提交

lib/data/models/cache_settings_model.dart

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