37 lines
1.1 KiB
Dart
37 lines
1.1 KiB
Dart
import 'dart:io';
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/// 应用配置管理
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///
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/// 支持通过环境变量配置数据目录和缓存目录：
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/// - `DATA_DIR`: 数据目录路径，默认为 `data`
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/// - `CACHE_DIR`: 缓存目录路径，默认为 `cache`
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class AppConfig {
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/// 数据目录路径
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final String dataDir;
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/// 缓存目录路径
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final String cacheDir;
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/// 单例实例
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static final AppConfig _instance = AppConfig._fromEnvironment();
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/// 获取配置实例
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factory AppConfig() => _instance;
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/// 从环境变量创建配置
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AppConfig._fromEnvironment()
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: dataDir = Platform.environment['DATA_DIR'] ?? 'data',
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cacheDir = Platform.environment['CACHE_DIR'] ?? 'cache';
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/// 获取相册预览缓存目录
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String get previewCacheDir => '$cacheDir/preview';
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/// 确保所有必需的目录都存在
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Future<void> ensureDirectoriesExist() async {
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await Directory(dataDir).create(recursive: true);
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await Directory(previewCacheDir).create(recursive: true);
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}
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@override
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String toString() => 'AppConfig(dataDir: $dataDir, cacheDir: $cacheDir)';
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} |