notes/lib/savesystem/note_file.dart

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import 'dart:io';
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import 'package:flutter/widgets.dart';
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import 'package:sqflite/sqflite.dart';
import 'path.dart';
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class NoteFile {
late Database _db;
String filepath;
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Database db() {
return _db;
}
NoteFile(this.filepath);
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Future<void> init() async {
final path = (await getSavePath()).path + Platform.pathSeparator + filepath;
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_db = await openDatabase(
path,
onCreate: (db, version) async {
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final batch = db.batch();
batch.execute('DROP TABLE IF EXISTS strokes;');
batch.execute('DROP TABLE IF EXISTS points;');
batch.execute(
'CREATE TABLE strokes(id integer primary key autoincrement, color INTEGER, elevation INTEGER)');
batch.execute(
'CREATE TABLE points(id integer primary key autoincrement, x INTEGER, y INTEGER, thickness REAL, strokeid INTEGER)');
await batch.commit();
return;
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},
// Set the version. This executes the onCreate function and provides a
// path to perform database upgrades and downgrades.
version: 1,
);
}
void delete() {
// todo remove db file
}
Future<void> close() async {
// shrink the db file size
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if (_db.isOpen) {
await _db.execute('VACUUM');
await _db.close();
} else {
debugPrint('db file unexpectedly closed before shrinking');
}
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}
}