Files
Virtual-Tutor/Chat-App/lib/services/storage_service.dart
2025-09-30 18:07:12 +02:00

98 lines
3.8 KiB
Dart

import 'dart:io';
import 'package:path_provider/path_provider.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:ai_chat_lab/services/deepl_service.dart';
class StorageService {
Future<bool> isSavingEnabled() async {
final prefs = await SharedPreferences.getInstance();
return prefs.getBool('save_conversations') ?? false;
}
Future<void> setSavingEnabled(bool enabled) async {
final prefs = await SharedPreferences.getInstance();
await prefs.setBool('save_conversations', enabled);
}
Future<void> saveConversation(String participantId, String userMessage, String agentResponse) async {
if (!await isSavingEnabled()) return;
try {
final directory = await getApplicationDocumentsDirectory();
final chatDir = Directory('${directory.path}/convai_chats');
if (!await chatDir.exists()) {
await chatDir.create(recursive: true);
}
final timestamp = DateTime.now();
final dateStr = '${timestamp.year}-${timestamp.month.toString().padLeft(2, '0')}-${timestamp.day.toString().padLeft(2, '0')}';
final baseName = 'chat_${participantId.isNotEmpty ? participantId : 'default'}_$dateStr';
final file = File('${chatDir.path}/$baseName.txt');
final timeStr = '${timestamp.hour.toString().padLeft(2, '0')}:${timestamp.minute.toString().padLeft(2, '0')}:${timestamp.second.toString().padLeft(2, '0')}';
final entry = '\n[$timeStr]\nparticipant: "$userMessage"\nagent: "$agentResponse"\n';
await file.writeAsString(entry, mode: FileMode.append);
// Also save DeepL-translated variant if enabled/configured
final prefs = await SharedPreferences.getInstance();
final deeplEnabled = prefs.getBool('deepl_enabled') ?? false;
final deeplApiKey = prefs.getString('deepl_api_key') ?? '';
final deeplUseFree = prefs.getBool('deepl_use_free') ?? true;
final deeplTargetLang = (prefs.getString('deepl_target_lang') ?? 'EN').toUpperCase();
final deeplSourceLang = (prefs.getString('deepl_source_lang') ?? 'AUTO').toUpperCase();
if (deeplEnabled && deeplApiKey.isNotEmpty) {
final deepl = DeepLService();
final translatedUser = await deepl.translateText(
apiKey: deeplApiKey,
text: userMessage,
targetLang: deeplTargetLang,
sourceLang: deeplSourceLang,
useFreeApi: deeplUseFree,
);
final translatedAgent = await deepl.translateText(
apiKey: deeplApiKey,
text: agentResponse,
targetLang: deeplTargetLang,
sourceLang: deeplSourceLang,
useFreeApi: deeplUseFree,
);
if ((translatedUser ?? '').isNotEmpty || (translatedAgent ?? '').isNotEmpty) {
final translatedFile = File('${chatDir.path}/$baseName.${deeplTargetLang.toLowerCase()}.txt');
final entryTranslated = '\n[$timeStr]\nparticipant: "${translatedUser ?? userMessage}"\nagent: "${translatedAgent ?? agentResponse}"\n';
await translatedFile.writeAsString(entryTranslated, mode: FileMode.append);
}
}
} catch (e) {
print('Error saving conversation: $e');
}
}
Future<List<File>> getChatFiles() async {
try {
final directory = await getApplicationDocumentsDirectory();
final chatDir = Directory('${directory.path}/convai_chats');
if (!await chatDir.exists()) {
return [];
}
final files = await chatDir.list().where((entity) => entity is File && entity.path.endsWith('.txt')).cast<File>().toList();
files.sort((a, b) => b.lastModifiedSync().compareTo(a.lastModifiedSync()));
return files;
} catch (e) {
print('Error getting chat files: $e');
return [];
}
}
Future<String> getChatDirectory() async {
final directory = await getApplicationDocumentsDirectory();
return '${directory.path}/convai_chats';
}
}