generated from dellevin/template
72 lines
2.0 KiB
Dart
72 lines
2.0 KiB
Dart
import 'dart:io';
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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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/// 阅读器文件路径管理
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class BookFileHelper {
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static final BookFileHelper instance = BookFileHelper._init();
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BookFileHelper._init();
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String? _rootPath;
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Future<String> get _root async {
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if (_rootPath != null) return _rootPath!;
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final dir = await getApplicationDocumentsDirectory();
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_rootPath = p.join(dir.path, 'mooknote', 'book_file');
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await Directory(_rootPath!).create(recursive: true);
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return _rootPath!;
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}
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Future<String> get bookFileRoot async => _root;
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Future<String> get coverDir async {
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final root = await _root;
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final dir = p.join(root, 'cover');
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await Directory(dir).create(recursive: true);
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return dir;
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}
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Future<String> bookDir(String bookId) async {
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final root = await _root;
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final dir = p.join(root, bookId);
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await Directory(dir).create(recursive: true);
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return dir;
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}
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Future<String> bookFile(String bookId, String fileName) async {
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final dir = await bookDir(bookId);
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return p.join(dir, fileName);
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}
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String? relativePath(String absolutePath) {
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if (_rootPath == null) return null;
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if (absolutePath.startsWith(_rootPath!)) {
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return absolutePath.substring(_rootPath!.length + 1);
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}
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return null;
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}
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Future<String> absolutePath(String relativePath) async {
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final root = await _root;
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return p.join(root, relativePath);
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}
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Future<void> deleteBookFiles(String bookId) async {
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final dir = await bookDir(bookId);
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if (await Directory(dir).exists()) {
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await Directory(dir).delete(recursive: true);
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}
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}
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/// 同步初始化（必须在使用 resolveAbsolutePath 前调用一次 bookFileRoot）
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Future<void> ensureInitialized() async {
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await _root;
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}
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/// 根据相对路径解析绝对路径（调用前需确保已初始化）
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String resolveAbsolutePath(String relativePath) {
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if (_rootPath == null) return relativePath;
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return p.join(_rootPath!, relativePath);
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}
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}
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