51 lines
1.6 KiB
Dart
51 lines
1.6 KiB
Dart
import 'dart:convert';
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import 'dart:io';
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import 'package:path_provider/path_provider.dart';
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import '../models/history/history_entry.dart';
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import '../models/library/library_list.dart';
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import 'archive_format.dart';
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import 'database.dart';
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Future<Directory> exportDirectory() async =>
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(await getExternalStorageDirectory())!.exportDirectory;
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/// Returns the path to which the data was saved.
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Future<String> exportData() async {
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final dir = await exportDirectory();
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final libraryDir = dir.libraryDir;
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libraryDir.createSync();
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await Future.wait([
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exportHistoryTo(dir),
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exportLibraryListsTo(libraryDir),
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]);
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return dir.path;
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}
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Future<void> exportHistoryTo(Directory dir) async {
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final file = File(dir.uri.resolve('history.json').path);
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file.createSync();
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final query = await db().query(TableNames.historyEntryOrderedByTimestamp);
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final List<HistoryEntry> entries =
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query.map((e) => HistoryEntry.fromDBMap(e)).toList();
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/// TODO: This creates a ton of sql statements. Ideally, the whole export
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/// should be done in only one query.
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///
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/// On second thought, is that even possible? It's a doubly nested list structure.
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final List<Map<String, Object?>> jsonEntries =
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await Future.wait(entries.map((he) async => he.toJson()));
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file.writeAsStringSync(jsonEncode(jsonEntries));
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}
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Future<void> exportLibraryListsTo(Directory dir) async => Future.wait(
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(await LibraryList.allLibraries).map((lib) async {
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final file = File(dir.uri.resolve('${lib.name}.json').path);
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file.createSync();
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final entries = await lib.entries;
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file.writeAsStringSync(jsonEncode(entries));
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}),
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);
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