liangchengyou / wow_english

  import 'package:audioplayers/audioplayers.dart';
  import 'package:flutter/cupertino.dart';
  import 'package:flutter/services.dart';
  import 'package:flutter_bloc/flutter_bloc.dart';

  import 'package:wow_english/common/request/dao/listen_dao.dart';
  
  import '../../../common/request/exception.dart';
  import '../../../models/read_content_entity.dart';
  import '../../../utils/loading.dart';
  import '../../../utils/toast_util.dart';
  
  
  part 'repeat_after_content_event.dart';
  part 'repeat_after_content_state.dart';
  
  enum VoiceRecordState {
    ///未知
    voiceRecordUnkonw,
    ///开始录音
    voiceRecordStat,
    ///正在录音
    voiceRecording,
    ///录音结束
    voiceRecordEnd
  }
  
  enum VoicePlayState {
    ///未知
    unKnow,
    ///播放中
    playing,
    ///播放完成
    completed,
    ///播放终止
    stop
  }
  
  class RepeatAfterContentBloc extends Bloc<RepeatAfterContentEvent, RepeatAfterContentState> {
  
    final String courseLessonId;
  
    ///是否正在播放视频
    bool _videoPlaying = true;
    ///是否需要录音
    bool _isRecord = false;
  
    Map? _voiceTestResult;
  

    int _recordNumber = 0;
  

    VoiceRecordState _voiceRecordState = VoiceRecordState.voiceRecordUnkonw;
  
    bool get videoPlaying => _videoPlaying;
  
    bool get isRecord => _isRecord;
  
    VoiceRecordState get voiceRecordState => _voiceRecordState;
  
    List<ReadContentEntity?>? _entityList;
  
    List<ReadContentEntity?>? get entityList => _entityList ;
  
    Map? get voiceTestResult => _voiceTestResult;
  
    late MethodChannel methodChannel;
  
    late AudioPlayer audioPlayer;
  
    RepeatAfterContentBloc(this.courseLessonId) : super(RepeatAfterContentInitial()) {
      on<VoiceRecordStateChangeEvent>(_voiceRecordStateChange);

      on<PostFollowReadContentEvent>(_postFollowReadContent);

      on<VideoPlayChangeEvent>(_videoPlayStateChange);
      on<RecordeVoicePlayEvent>(_recordeVoicePlay);
      on<XSVoiceResultEvent>(_voiceXsResult);
      on<XSVoiceInitEvent>(_initVoiceSdk);
      on<RequestDataEvent>(_requestData);
      on<XSVoiceTestEvent>(_voiceXsTest);
      on<XSVoiceStopEvent>(_voiceXsStop);
      on<VoiceRecordEvent>(_voiceRecord);
      on<InitBlocEvent>((event, emit) {
        //音频播放器
        audioPlayer = AudioPlayer();
        audioPlayer.onPlayerStateChanged.listen((event) async {
          debugPrint('播放状态变化');
          if (event == PlayerState.completed) {
            debugPrint('播放完成');
  
          }
          if (event == PlayerState.stopped) {
            debugPrint('播放结束');
  
          }
  
          if (event == PlayerState.playing) {
            debugPrint('正在播放中');
  
          }
          if(isClosed) {
            return;
          }
  
        });
  
        methodChannel = const MethodChannel('wow_english/sing_sound_method_channel');
        methodChannel.setMethodCallHandler((call) async {
          if (call.method == 'voiceResult') {//评测结果
            add(XSVoiceResultEvent(call.arguments));

            add(PostFollowReadContentEvent());

            return;
          }
  
          if (call.method == 'voiceStart') {//评测开始
            debugPrint('评测开始');
            return;
          }
  
          if (call.method == 'voiceEnd') {//评测结束
            debugPrint('评测结束');
            return;
          }
  
          if (call.method == 'voiceFail') {//评测失败

            showToast('评测失败');

            return;
          }
        });
      });
    }
  
    ///请求数据
    void _requestData(RequestDataEvent event,Emitter<RepeatAfterContentState> emitter) async {
      try {
        await loading(() async {
          _entityList = await ListenDao.readContent(courseLessonId);
          emitter(RequestDataState());
        });
      } catch (e) {
        if (e is ApiException) {
          showToast(e.message??'请求失败,请检查网络连接');
        }
      }
    }
  

    ///跟读结果
    void _postFollowReadContent(PostFollowReadContentEvent event,Emitter<RepeatAfterContentState> emitter) async {
      try {
        await loading(() async {
          _entityList = await ListenDao.followResult(_recordNumber.toString(),courseLessonId);
  
        });
      } catch (e) {
        if (e is ApiException) {
  
        }
      }
    }
  

    void _videoPlayStateChange(VideoPlayChangeEvent event,Emitter<RepeatAfterContentState> emitter) async {
      _videoPlaying = !_videoPlaying;
      emitter(VideoPlayChangeState());
    }
  
    void _voiceRecord(VoiceRecordEvent event,Emitter<RepeatAfterContentState> emitter) async {
      _isRecord = !_isRecord;
      emitter(VoiceRecordChangeState());
    }
  
    void _voiceRecordStateChange(VoiceRecordStateChangeEvent event,Emitter<RepeatAfterContentState> emitter) async {
      _voiceRecordState = event.voiceRecordState;
      emitter(VoiceRecordStateChange());
    }
  
  
    _initVoiceSdk(XSVoiceInitEvent event,Emitter<RepeatAfterContentState> emitter) async {
      methodChannel.invokeMethod('initVoiceSdk',event.data);
    }
  
    ///先声测试
    void _voiceXsTest(XSVoiceTestEvent event,Emitter<RepeatAfterContentState> emitter) async {
      await audioPlayer.stop();
      methodChannel.invokeMethod(
          'startVoice',
          {'word':event.testWord,'type':event.type,'userId':event.userId.toString()}
      );

      _recordNumber++;

      emitter(XSVoiceTestState());
    }
  
    ///终止评测
    void _voiceXsStop(XSVoiceStopEvent event,Emitter<RepeatAfterContentState> emitter) async {
      methodChannel.invokeMethod('stopVoice');
    }
  
    ///先声评测结果
    void _voiceXsResult(XSVoiceResultEvent event,Emitter<RepeatAfterContentState> emitter) async {
      final Map args = event.message as Map;
      final result = args['result'] as Map;
      final overall = result['overall'].toString()??'';
      final audioUrl = args['audioUrl'].toString()??'';
      _voiceTestResult = {'overall':overall,'audioUrl':audioUrl};
      emitter(XSVoiceTestState());
    }
  
    ///播放声音
    void _recordeVoicePlay(RecordeVoicePlayEvent event,Emitter<RepeatAfterContentState> emitter) async {
      await audioPlayer.stop();
      assert(event.audioUrl.isNotEmpty);
      await audioPlayer.play(UrlSource(event.audioUrl));
    }
  }