speechService static method

Implementation

static String speechService() {
  return '''
import 'package:flutter/foundation.dart';
import 'package:speech_to_text/speech_to_text.dart' as stt;

/// Simple wrapper around speech_to_text.
///
/// Usage:
/// final speech = SpeechService();
/// await speech.init();
/// await speech.startListening(onResult: (text) { /* use text */ });
/// await speech.stopListening();
class SpeechService {
final stt.SpeechToText _speech = stt.SpeechToText();
bool _available = false;

bool get isAvailable => _available;
bool get isListening => _speech.isListening;

Future<bool> init() async {
  _available = await _speech.initialize(
    onStatus: (status) {
      if (kDebugMode) {
        debugPrint('Speech status: \$status');
      }
    },
    onError: (error) {
      if (kDebugMode) {
        debugPrint('Speech error: \$error');
      }
    },
  );
  return _available;
}

Future<void> startListening({
  required ValueChanged<String> onResult,
  String localeId = 'en_US',
}) async {
  if (!_available) {
    final ok = await init();
    if (!ok) return;
  }

  await _speech.listen(
    onResult: (result) => onResult(result.recognizedWords),
    localeId: localeId,
  );
}

Future<void> stopListening() async {
  await _speech.stop();
}

Future<void> cancel() async {
  await _speech.cancel();
}
}
''';
}