88 lines
2.1 KiB
Dart
88 lines
2.1 KiB
Dart
import 'dart:io';
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import 'package:flutter/widgets.dart';
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import 'package:sqflite/sqflite.dart';
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import 'path.dart';
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class NoteFile {
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Database? _db;
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String filename;
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String? _basePath;
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String? _newFileName;
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Database db() {
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assert(_db != null);
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return _db!;
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}
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NoteFile(this.filename);
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Future<void> init() async {
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if (_basePath == null) {
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await _initBasePath();
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}
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final path = _basePath! + Platform.pathSeparator + filename;
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_db = await openDatabase(
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path,
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onCreate: (db, version) async {
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final batch = db.batch();
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batch.execute('DROP TABLE IF EXISTS strokes;');
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batch.execute('DROP TABLE IF EXISTS points;');
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batch.execute(
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'CREATE TABLE strokes(id integer primary key autoincrement, color INTEGER, elevation INTEGER)');
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batch.execute(
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'CREATE TABLE points(id integer primary key autoincrement, x INTEGER, y INTEGER, thickness REAL, strokeid INTEGER)');
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await batch.commit();
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return;
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},
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// Set the version. This executes the onCreate function and provides a
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// path to perform database upgrades and downgrades.
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version: 1,
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);
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}
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Future<void> delete() async {
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await close();
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if (_basePath == null) {
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await _initBasePath();
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}
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await File(_basePath! + Platform.pathSeparator + filename).delete();
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}
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void rename(String newname) {
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_newFileName = newname;
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}
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Future<void> close() async {
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// shrink the db file size
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if (_db != null && _db!.isOpen) {
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await _db!.execute('VACUUM');
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await _db!.close();
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} else {
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debugPrint('db file unexpectedly closed before shrinking');
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}
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if (_basePath == null) {
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await _initBasePath();
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}
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// perform qued file renaming operations
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if (_newFileName != null) {
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File(_basePath! + Platform.pathSeparator + filename)
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.rename(_basePath! + Platform.pathSeparator + _newFileName!);
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filename = _newFileName!;
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_newFileName = null;
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}
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}
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Future<void> _initBasePath() async {
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_basePath = (await getSavePath()).path;
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}
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}
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