OpenMediacenterMobileFlutter/lib/db/database.dart
lukas-heiligenbrunner 9ef317f0ba outsourced lots of api calls to api folder
centered error message when failed loading video feed
display server url on settings page
2022-10-15 20:28:31 +02:00

68 lines
1.6 KiB
Dart

import 'package:flutter/foundation.dart';
import 'package:path/path.dart';
import 'package:sqflite/sqflite.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';
import '../log/log.dart';
class Db {
late Database _db;
void init() async {
if (kIsWeb) {
Log.i("Database on web is not supported");
return;
}
String dbpath = 'previews.db';
if (defaultTargetPlatform == TargetPlatform.android ||
defaultTargetPlatform == TargetPlatform.iOS) {
dbpath = join(await getDatabasesPath(), dbpath);
} else {
// Initialize FFI
sqfliteFfiInit();
// Change the default factory
databaseFactory = databaseFactoryFfi;
}
_db = await openDatabase(
dbpath,
onCreate: (db, version) {
return db.execute(
'CREATE TABLE previews(id INTEGER PRIMARY KEY, thumbnail BLOB)',
);
},
// Set the version. This executes the onCreate function and provides a
// path to perform database upgrades and downgrades.
version: 1,
);
}
/// delete all data but keep structure
Future<void> clear() async {
await _db.delete("previews");
// shrink the db file size
await _db.execute("VACUUM");
}
/// get db size in bytes
Future<int> getDbSize() async {
final int cnt = (await Db().db().rawQuery("pragma page_count;"))[0]
["page_count"] as int;
final int pagesize =
(await Db().db().rawQuery("pragma page_size;"))[0]["page_size"] as int;
return cnt * pagesize;
}
Database db() {
return _db;
}
static final Db _singleton = Db._internal();
factory Db() {
return _singleton;
}
Db._internal();
}