liangchengyou / wow_english

  import 'package:common_utils/common_utils.dart';

  import 'package:flutter/material.dart';

  import 'package:flutter_bloc/flutter_bloc.dart';

  import 'package:flutter_screenutil/flutter_screenutil.dart';

  import 'package:video_player/video_player.dart';

  import 'package:wow_english/common/extension/string_extension.dart';

  import 'package:wow_english/pages/video/lookvideo/bloc/look_video_bloc.dart';

  import 'package:wow_english/route/route.dart';

  import '../../../section/subsection/base_section/event.dart';
  import '../../../section/subsection/base_section/state.dart';

  import 'video_opera_widget.dart';

  
  class VideoWidget extends StatefulWidget {

    const VideoWidget(
        {super.key,
        this.videoUrl = '',
        this.typeTitle,
        this.courseLessonId = '',
        this.isTopic = false});

  
    final String videoUrl;

    final String? typeTitle;

    final String courseLessonId;

    final bool isTopic;

  
    @override
    State<StatefulWidget> createState() {
      return _VideoWidgetState();
    }
  }
  
  class _VideoWidgetState extends State<VideoWidget> {
    VideoPlayerController? _controller;
    String _currentTime = '00:00';
    String _totalTime = '00:00';
    double _playDegree = 0.0;
    bool _hiddenTipView = false;
    TimerUtil? timerUtil;
  
    String formatDuration(Duration duration) {
      String hours = duration.inHours.toString().padLeft(2, '0');

      String minutes =
          duration.inMinutes.remainder(60).toString().padLeft(2, '0');
      String seconds =
          duration.inSeconds.remainder(60).toString().padLeft(2, '0');

      return "$hours:$minutes:$seconds";
    }
  
    void _addListener() {
      _controller!.addListener(() {

        if (_controller!.value.isInitialized) {

          if (_controller!.value.isPlaying) {
            setState(() {

              double currentSecond = getCurrentPositionSeconds().toDouble();

              int totalSecond =
                  _controller!.value.duration.inMinutes.remainder(60) * 60 +
                      _controller!.value.duration.inSeconds.remainder(60);

              _currentTime = formatDuration(_controller!.value.position);

              _playDegree = currentSecond / totalSecond;

              if (_playDegree > 1.0) {
                _playDegree = 1.0;
              }

              if (_playDegree < 0) {

                _playDegree = 0.0;
              }

            });

          } else if (widget.isTopic &&
              //受限于video_player库没有唯一的播放完成状态标识，发现isBuffering=false的时候暂时是安全唯一的
              _controller?.value.isBuffering == false &&
              _controller!.value.isCompleted &&
              _controller!.value.position.inSeconds ==
                  _controller!.value.duration.inSeconds) {
            final lookVideoBloc = context.read<LookVideoBloc>();

            lookVideoBloc.sectionComplete(
                () {
                  popPage(data: {
                    'courseLessonId': widget.courseLessonId,
                    'currentTime': getCurrentPositionSeconds(),
                    'isCompleted': true,
                    'nextSection': widget.isTopic
                  });
                } as VoidCallback, againSectionTap: (() {

              if (mounted && !lookVideoBloc.isClosed) {
                lookVideoBloc.add(SectionAgainEvent());
              }

            }), context: context);

          }
        }
      });
    }
  
    //开始倒计时

    void startTimer() {
      if (timerUtil == null) {
        timerUtil = TimerUtil(mInterval: 1000, mTotalTime: 1000 * 10);

        timerUtil!.setOnTimerTickCallback((int tick) {
          double currentTick = tick / 1000;

          if (currentTick.toInt() == 0) {
            //倒计时结束

            setState(() {
              _hiddenTipView = true;
            });
            timerUtil!.cancel();
            timerUtil = null;
          }
        });
        timerUtil!.startCountDown();
      }
    }
  
    //取消倒计时
    void cancelTimer() {
      timerUtil!.cancel();
      timerUtil = null;
    }
  

    void actionType(OperationType type) async {
      if (type == OperationType.back) {

        if (widget.courseLessonId.isEmpty) {
          popPage();
        } else {
          if (_controller == null) {
            popPage();
            return;
          }

          popPage(data: {
            'courseLessonId': widget.courseLessonId,

            'currentTime': getCurrentPositionSeconds(),

          });

        }

      } else if (type == OperationType.playState) {
        if (_controller!.value.isPlaying) {
          _controller!.pause();
        } else {
          _controller!.play();
        }

        setState(() {});

      }
    }
  

    @override
    void initState() {
      super.initState();

      Uri uri = Uri.parse(widget.videoUrl);
      _controller = VideoPlayerController.networkUrl(uri)

        ..initialize().then((_) {

          startTimer();
          setState(() {
            _currentTime = formatDuration(_controller!.value.position);
            _totalTime = formatDuration(_controller!.value.duration);

            _controller!.setLooping(!widget.isTopic);

            _controller!.setVolume(100);
            _controller!.play();
          });
          _addListener();
        });
    }
  
    @override
    Widget build(BuildContext context) {

      return BlocListener<LookVideoBloc, BaseSectionState>(
        listener: (context, state) async {
          if (state is SectionAgainState) {
            await _controller?.seekTo(Duration.zero);
            _controller?.play();
          }

        },

        child: GestureDetector(
          onTap: () {

            setState(() {

              _hiddenTipView = !_hiddenTipView;
              if (!_hiddenTipView) {
                startTimer();
              } else {
                if (timerUtil!.isActive()) {
                  cancelTimer();
                }
              }

            });

          },
          onDoubleTap: () {
            if (_controller!.value.isInitialized) {
              if (_controller!.value.isPlaying) {
                _controller!.pause();
              } else {
                _controller!.play();
              }
              setState(() {});
            }
          },
          child: Center(
            child: _controller!.value.isInitialized
                ? Stack(

                    alignment: Alignment.center,
                    children: [
                      SizedBox(
                        height: double.infinity,
                        width: double.infinity,
                        child: AspectRatio(
                          aspectRatio: _controller!.value.aspectRatio,
                          child: VideoPlayer(_controller!),
                        ),
                      ),
                      Offstage(
                        offstage: _hiddenTipView,
                        child: VideoOperaWidget(
                          title: widget.typeTitle ?? 'song',
                          degree: _playDegree,
                          totalTime: _totalTime,
                          currentTime: _currentTime,
                          isPlay: _controller!.value.isPlaying,
                          actionEvent: (OperationType type) {
                            actionType(type);
                          },
                          sliderChangeEvent: (double degree) {
                            int totalSecond = _controller!
                                        .value.duration.inMinutes
                                        .remainder(60) *
                                    60 +
                                _controller!.value.duration.inSeconds
                                    .remainder(60);
                            int positionSecond = (totalSecond * degree).toInt();
                            _controller!
                                .seekTo(Duration(seconds: positionSecond));
                          },
                        ),
                      ),
                      Offstage(
                        offstage: _controller!.value.isPlaying,
                        child: IconButton(
                          onPressed: () {
                            _controller!.play();
                          },
                          icon: Image.asset(
                            'video_stop'.assetPng,
                            width: 70.w,
                            height: 70.h,
                          ),
                        ),
                      )
                    ],
                  )

                : Container(

                    color: Colors.white,
                    child: const CircularProgressIndicator(),
                    // Text(
                    //   '视频加载中....',
                    //   style: TextStyle(fontSize: 20.sp, color: Colors.black),
                    // ),
                  ),

          ),
        ),
      );
    }
  
    @override
    void dispose() {
      _controller?.dispose();
      _controller?.removeListener(() {});
      if (timerUtil != null) {
        timerUtil!.cancel();
        timerUtil = null;
      }
      super.dispose();
    }

  
    ///获取当前进度秒数
    int getCurrentPositionSeconds() {
      return (_controller!.value.position.inMinutes.remainder(60) * 60 +
          _controller!.value.position.inSeconds.remainder(60));
    }

  }