lib/services/cloud_tts_service.dartDart
import 'dart:convert';
import 'package:http/http.dart' as http;
import '../core/api/api_config.dart';
import '../core/localization/app_localizations.dart';
import '../core/text/wp_text.dart';
class CloudTtsException implements Exception {
CloudTtsException(this.message, {this.statusCode});
final String message;
final int? statusCode;
}
class CloudTtsResult {
const CloudTtsResult({
required this.audioUrl,
required this.cached,
required this.voice,
required this.languageCode,
});
final String audioUrl;
final bool cached;
final String voice;
final String languageCode;
}
class CloudTtsService {
CloudTtsService({http.Client? client}) : _client = client ?? http.Client();
final http.Client _client;
Future<CloudTtsResult> synthesize({
required String text,
required String languageCode,
String variant = 'normal',
}) async {
final clean = text.trim();
if (clean.isEmpty) {
throw CloudTtsException(AppLocalizations.tFor(languageCode, 'ttsNoText'));
}
final endpoint = Uri.parse('${ApiConfig.baseUrl}/tts');
final response = await _client
.post(
endpoint,
headers: const {
'Content-Type': 'application/json; charset=utf-8',
'Accept': 'application/json',
},
body: jsonEncode({
'text': clean,
'lang': languageCode,
'variant': variant,
}),
)
.timeout(const Duration(seconds: 35));
Map<String, dynamic> data;
try {
data = jsonDecode(response.body) as Map<String, dynamic>;
} catch (_) {
throw CloudTtsException(
AppLocalizations.tFor(languageCode, 'ttsInvalidResponse'),
statusCode: response.statusCode,
);
}
if (response.statusCode < 200 || response.statusCode >= 300) {
throw CloudTtsException(
WpText.nullablePlain(data['message']) ??
AppLocalizations.tFor(languageCode, 'ttsUnavailable'),
statusCode: response.statusCode,
);
}
final audioUrl = data['audio_url']?.toString() ?? '';
if (audioUrl.isEmpty) {
throw CloudTtsException(
AppLocalizations.tFor(languageCode, 'ttsNoAudioUrl'));
}
return CloudTtsResult(
audioUrl: audioUrl,
cached: data['cached'] == true,
voice: data['voice']?.toString() ?? '',
languageCode: data['lang']?.toString() ?? languageCode,
);
}
void dispose() => _client.close();
}