flixcoo/cabo-counter
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Implemented exportJsonFile & importJsonFile methods

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This commit is contained in:
Felix Kirchner
2025-05-01 00:41:35 +02:00
parent c8113430f1
commit 22ac2efea2
3 changed files with 88 additions and 30 deletions
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103
lib/utility/local_storage_service.dart
View File

@@ -1,17 +1,34 @@
import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'package:cabo_counter/data/game_session.dart';
import 'package:cabo_counter/utility/globals.dart';
import 'package:file_picker/file_picker.dart';
import 'package:file_saver/file_saver.dart';
import 'package:path_provider/path_provider.dart';
class LocalStorageService {
static const String _fileName = 'game_data.json';
/// Speichert GameSessions im App-Dokumentenverzeichnis
/// Writes the game session list to a JSON file and returns it as string.
static String getJsonFile() {
final jsonFile =
Globals.gameList.map((session) => session.toJson()).toList();
return json.encode(jsonFile);
}
/// Returns the path to the local JSON file.
static Future<File> _getFilePath() async {
final directory = await getApplicationDocumentsDirectory();
final path = '${directory.path}/$_fileName';
return File(path);
}
/// Saves the game sessions to a local JSON file.
static Future<void> saveGameSessions() async {
try {
final file = await _getLocalFile();
final file = await _getFilePath();
final jsonFile = getJsonFile();
await file.writeAsString(jsonFile);
print('Daten gespeichert');
@@ -20,44 +37,82 @@ class LocalStorageService {
}
}
/// Lädt GameSessions aus dem App-Dokumentenverzeichnis
/// Loads the game data from a local JSON file.
static Future<void> loadGameSessions() async {
print('Versuche, Daten zu laden...'); // FIXME Debug-Ausgabe
print('Versuche, Daten zu laden...');
try {
final file = await _getLocalFile();
final file = await _getFilePath();
if (await file.exists()) {
print('Datei existiert'); // FIXME Debug-Ausgabe
print('Es existiert bereits eine Datei mit Spieldaten');
final jsonString = await file.readAsString();
if (jsonString.isNotEmpty) {
print('Datei ist nicht leer'); // FIXME Debug-Ausgabe
print('Die Datei ist nicht leer');
final jsonList = json.decode(jsonString) as List<dynamic>;
print('JSON: $jsonList'); // FIXME Debug-Ausgabe
Globals.gameList =
jsonList.map((json) => GameSession.fromJson(json)).toList();
print('Daten erfolgreich geladen');
print('JSON: $jsonList');
Globals.gameList = jsonList
.map((jsonItem) =>
GameSession.fromJson(jsonItem as Map<String, dynamic>))
.toList()
.cast<GameSession>(); // Explicit cast to List<GameSession>
print('Die Daten wurden erfolgreich geladen');
} else {
print('Datei ist leer');
print('Die Datei ist leer');
}
} else {
print('Datei existiert nicht');
print('Es existiert bisher noch keine Datei mit Spieldaten');
}
} catch (e) {
print('Fehler beim Laden: $e');
// Bei Fehler eine leere Liste setzen
print('Fehler beim Laden der Spieldaten:\n$e');
Globals.gameList = [];
}
}
static String getJsonFile() {
final jsonFile =
Globals.gameList.map((session) => session.toJson()).toList();
return json.encode(jsonFile);
/// Opens the file picker to save a JSON file with the current game data.
static Future<void> exportJsonFile() async {
final jsonString = getJsonFile();
try {
final bytes = Uint8List.fromList(utf8.encode(jsonString));
final result = await FileSaver.instance.saveAs(
name: 'cabo_counter_data',
bytes: bytes,
ext: 'json',
mimeType: MimeType.json,
);
print('Datei gespeichert: $result');
} catch (e) {
print('Fehler beim Speichern: $e');
}
}
static Future<File> _getLocalFile() async {
final directory = await getApplicationDocumentsDirectory();
final path = '${directory.path}/$_fileName';
print('Speicherpfad: $path'); // FIXME Debug-Ausgabe
return File(path);
static Future<bool> importJsonFile() async {
try {
final result = await FilePicker.platform.pickFiles(
type: FileType.custom,
allowedExtensions: ['json'],
);
String jsonString = '';
if (result != null) {
if (result.files.single.bytes != null) {
final Uint8List fileBytes = result.files.single.bytes!;
jsonString = utf8.decode(fileBytes);
} else if (result.files.single.path != null) {
final file = File(result.files.single.path!);
jsonString = await file.readAsString();
}
final jsonList = json.decode(jsonString) as List<dynamic>;
print('JSON Inhalt: $jsonList');
Globals.gameList = jsonList
.map((jsonItem) =>
GameSession.fromJson(jsonItem as Map<String, dynamic>))
.toList();
return true;
} else {
print('Der Dialog wurde abgebrochen');
return false;
}
} catch (e) {
print('Fehler beim Importieren: $e');
return false;
}
}
}

10
lib/views/information_view.dart
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@@ -1,3 +1,4 @@
import 'package:cabo_counter/utility/local_storage_service.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
@@ -83,7 +84,10 @@ class InformationView extends StatelessWidget {
),
CupertinoButton(
child: const Text('Spieldaten exportieren'),
onPressed: () => {saveJsonToDevice()})
onPressed: () => LocalStorageService.exportJsonFile()),
CupertinoButton(
child: const Text('Spieldaten importieren'),
onPressed: () => LocalStorageService.importJsonFile()),
],
),
Positioned(
@@ -115,8 +119,4 @@ class InformationView extends StatelessWidget {
],
)));
}
void saveJsonToDevice() async {
//todo: implement
}
}

5
pubspec.yaml
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@@ -2,7 +2,7 @@ name: cabo_counter
description: "Mobile app for the card game Cabo"
publish_to: 'none'
version: 0.1.3+103
version: 0.1.3+107
environment:
sdk: ^3.5.4
@@ -17,6 +17,9 @@ dependencies:
flutter_keyboard_visibility: ^6.0.0
path_provider: ^2.1.1
file_picker: any
file_saver: ^0.2.6
typed_data: ^1.3.2
dev_dependencies:
flutter_test: