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This commit is contained in:
Oliver Walters
2021-02-08 20:32:49 +11:00
parent b18daf3acf
commit b34a91b865
10 changed files with 460 additions and 44 deletions
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lib/preferences.dart
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@ -1,8 +1,57 @@
import 'package:flutter/cupertino.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'api.dart';
import 'package:path_provider/path_provider.dart';
import 'package:sembast/sembast.dart';
import 'package:sembast/sembast_io.dart';
import 'package:path/path.dart';
import 'dart:async';
/*
* Class for storing InvenTree preferences in a NoSql DB
*/
class InvenTreePreferencesDB {
static final InvenTreePreferencesDB _singleton = InvenTreePreferencesDB._();
static InvenTreePreferencesDB get instance => _singleton;
InvenTreePreferencesDB._();
Completer<Database> _dbOpenCompleter;
Future<Database> get database async {
// If completer is null, AppDatabaseClass is newly instantiated, so database is not yet opened
if (_dbOpenCompleter == null) {
_dbOpenCompleter = Completer();
// Calling _openDatabase will also complete the completer with database instance
_openDatabase();
}
// If the database is already opened, awaiting the future will happen instantly.
// Otherwise, awaiting the returned future will take some time - until complete() is called
// on the Completer in _openDatabase() below.
return _dbOpenCompleter.future;
}
Future _openDatabase() async {
// Get a platform-specific directory where persistent app data can be stored
final appDocumentDir = await getApplicationDocumentsDirectory();
print("Documents Dir: ${appDocumentDir.toString()}");
print("Path: ${appDocumentDir.path}");
// Path with the form: /platform-specific-directory/demo.db
final dbPath = join(appDocumentDir.path, 'InvenTreeSettings.db');
final database = await databaseFactoryIo.openDatabase(dbPath);
// Any code awaiting the Completer's future will now start executing
_dbOpenCompleter.complete(database);
}
}
class InvenTreePreferences {
static const String _SERVER = 'server';