huixiang_app/lib/community/community_view/class_details.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:huixiang/community/community_view/class_details_video.dart';
import 'package:huixiang/generated/l10n.dart';
import 'package:huixiang/retrofit/data/base_data.dart';
import 'package:huixiang/retrofit/data/chapter.dart';
import 'package:huixiang/retrofit/data/course_details.dart';
import 'package:huixiang/retrofit/retrofit_api.dart';
import 'package:huixiang/utils/font_weight.dart';
import 'package:huixiang/view_widget/tips_dialog.dart';
import 'package:huixiang/web/web_view/comment_list.dart';
import 'package:huixiang/web/web_view/input_comment.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

class ClassDetails extends StatefulWidget {
  final Map<String, dynamic> arguments;

  ClassDetails({this.arguments});

  @override
  State<StatefulWidget> createState() {
    return _ClassDetails();
  }
}

class _ClassDetails extends State<ClassDetails> with WidgetsBindingObserver {
  ApiService apiService;
  final GlobalKey commentKey = GlobalKey();
  final GlobalKey videoKey = GlobalKey();
  final ScrollController scrollController = ScrollController();
  bool isKeyBoardShow = false;
  var commentFocus = FocusNode();
  String parenId = "0";
  String hintText = S.current.liuxianinjingcaidepinglunba;
  final GlobalKey inputKey = GlobalKey();
  final TextEditingController commentTextController = TextEditingController();
  int commentTotal = 0;
  CourseDetails course;
  List<Chapter> chapterList = [];
  bool isShowImg = true;
  int chapterIndex = 0;
  double height = 0;

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    courseDetails(widget.arguments["id"]);
    queryChapterList(widget.arguments["id"]);
  }

  ///课程章节列表
  queryChapterList(courseId) async {
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      apiService = ApiService(
        Dio(),
        context: context,
        token: value.getString("token"),
      );
    }
    BaseData<List<Chapter>> baseData =
        await apiService.catalogList(courseId).catchError((onError) {});
    if (baseData != null && baseData.isSuccess) {
      setState(() {
        chapterList.clear();
        chapterList.addAll(baseData.data);
        chapterIndex = 0;
        ClassDetailsVideoState state = videoKey.currentState;
        state.initVideo(chapterList[chapterIndex].content.fileUrl);
        // initVideo(chapterList[chapterIndex].content.fileUrl);
      });
    }
    EasyLoading.dismiss();
  }

  ///课程详情
  courseDetails(id) async {
    if (apiService == null) {
      SharedPreferences value = await SharedPreferences.getInstance();
      apiService = ApiService(
        Dio(),
        context: context,
        token: value.getString("token"),
      );
    }
    BaseData<CourseDetails> baseData =
        await apiService.course(id).catchError((error) {});
    if (baseData != null && baseData.isSuccess) {
      setState(() {
        course = baseData.data;
      });
    }
  }

  @override
  void didChangeMetrics() {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      if (!mounted) return;
      if (MediaQuery.of(context).viewInsets.bottom == 0) {
        if (isKeyBoardShow) {
          FocusScope.of(context).requestFocus(FocusNode());
          if (mounted)
            setState(() {
              hintText = S.current.liuxianinjingcaidepinglunba;
              isKeyBoardShow = false;
            });
        }
      } else {
        if (mounted)
          setState(() {
            isKeyBoardShow = true;
          });
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return AnnotatedRegion<SystemUiOverlayStyle>(
      value: SystemUiOverlayStyle.light,
        child: Material(child: Scaffold(
          body: Container(
            // margin: EdgeInsets.only(top:25),
            child: Column(
              children: [
                Expanded(
                  child: SingleChildScrollView(
                    physics: BouncingScrollPhysics(),
                    child: Column(
                      children: [
                        Stack(
                          children: [
                            ClassDetailsVideo(key:videoKey,exitFull: (){setState(() {});},
                              coverImg: chapterList.length > chapterIndex
                                  ? chapterList[chapterIndex].content.coverImg
                                  : "",isShowImg: this.isShowImg,
                              changeShowImg: (isShowImg){setState(() {
                                this.isShowImg = isShowImg;
                              });},heightFun: (height) {
                                this.height = height +
                                    MediaQuery
                                        .of(context)
                                        .padding
                                        .top +
                                    kToolbarHeight +
                                    24;
                                if (mounted) setState(() {});
                              },),
                            Container(
                              margin: EdgeInsets.only(
                                  top: 40.h, left: 16.w, right: 16.w),
                              decoration: BoxDecoration(
                                color: Colors.transparent,
                              ),
                              child: Row(
                                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                                crossAxisAlignment: CrossAxisAlignment.center,
                                children: [
                                  GestureDetector(
                                    child: Image.asset(
                                      "assets/image/integral_return.png",
                                      width: 24,
                                      height: 24,
                                    ),
                                    onTap: () {
                                      Navigator.of(context).pop(
                                          course != null ? course.viewers + 1 : 0);
                                    },
                                  ),
                                ],
                              ),
                            ),
                          ],
                        ),
                        Container(
                          height: 123,
                          margin: EdgeInsets.only(bottom: 16.h),
                          padding: EdgeInsets.only(left: 16, top: 16, right: 10),
                          decoration: BoxDecoration(
                            color: Colors.white,
                            boxShadow: [
                              BoxShadow(
                                color: Colors.black.withAlpha(12),
                                offset: Offset(0, 2),
                                blurRadius: 14,
                                spreadRadius: 0,
                              )
                            ],
                          ),
                          child: Column(
                            mainAxisAlignment: MainAxisAlignment.start,
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Row(
                                children: [
                                  Container(
                                    height: 22.h,
                                    padding:EdgeInsets.only(left:2,right:2),
                                    alignment: Alignment.center,
                                    decoration: BoxDecoration(
                                      borderRadius: BorderRadius.circular(2),
                                      border: Border.all(
                                        width: 1,
                                        color: Color(0xFFFF7A1A),
                                        style: BorderStyle.solid,
                                      ),
                                    ),
                                    child: Text(
                                      (course?.tags != null &&
                                          course.tags.length > 0)
                                          ? course.tags[0]
                                          : "",
                                      style: TextStyle(
                                        fontSize: 14.sp,
                                        fontWeight: MyFontWeight.medium,
                                        color: Color(0xFFFF7A1A),
                                      ),
                                    ),
                                  ),
                                  SizedBox(
                                    width: 6.w,
                                  ),
                                  Expanded(
                                    child: Text(
                                      course != null ? course.subject : "",
                                      overflow: TextOverflow.ellipsis,
                                      maxLines: 2,
                                      style: TextStyle(
                                        fontSize: 16.sp,
                                        fontWeight: MyFontWeight.semi_bold,
                                        color: Color(0xFF1A1A1A),
                                      ),
                                    ),
                                    flex: 1,
                                  )
                                ],
                              ),
                              SizedBox(
                                height: 10.h,
                              ),
                              Padding(
                                padding: EdgeInsets.only(right: 16),
                                child: Row(
                                  children: [
                                    Expanded(
                                        child: Text(
                                          "讲师:${course != null ? course.author.name : ""}",
                                          overflow: TextOverflow.ellipsis,
                                          maxLines: 2,
                                          style: TextStyle(
                                            fontSize: 12.sp,
                                            fontWeight: MyFontWeight.regular,
                                            color: Colors.black,
                                          ),
                                        )),
                                    Text(
                                      "播放次数:",
                                      style: TextStyle(
                                        fontSize: 12.sp,
                                        fontWeight: MyFontWeight.regular,
                                        color: Color(0xFF808080),
                                      ),
                                    ),
                                    SizedBox(
                                      width: 4,
                                    ),
                                    Text(
                                      course != null
                                          ? course.viewers.toString()
                                          : "",
                                      overflow: TextOverflow.ellipsis,
                                      maxLines: 2,
                                      style: TextStyle(
                                        fontSize: 12.sp,
                                        fontWeight: MyFontWeight.regular,
                                        color: Color(0xFF808080),
                                      ),
                                    ),
                                  ],
                                ),
                              ),
                              SizedBox(
                                height: 10.h,
                              ),
                              Text(
                                course != null ? course.introduce : "",
                                overflow: TextOverflow.ellipsis,
                                maxLines: 2,
                                style: TextStyle(
                                  fontSize: 12.sp,
                                  fontWeight: MyFontWeight.regular,
                                  color: Colors.black,
                                ),
                              ),
                            ],
                          ),
                        ),
                        anthology(),
                        CommentList(
                          commentKey,
                          course?.likes ?? course?.likes ?? 0,
                          widget.arguments["id"],
                          3,
                          isKeyBoardShow,
                          _reply,
                          _delCommentTips,
                          12.sp,
                          requestApiFinish: (total) {
                            setState(() {
                              commentTotal = total;
                            });
                          },
                        ),
                        if (commentTotal == 0)
                          Container(
                            width: double.infinity,
                            alignment: Alignment.topCenter,
                            margin: EdgeInsets.only(top: 40),
                            padding: EdgeInsets.all(22.h),
                            child: Text(
                              S.of(context).zanwupinglun,
                              style: TextStyle(
                                fontSize: 12,
                                fontWeight: FontWeight.bold,
                                color: Color(0xFFA0A0A0),
                              ),
                            ),
                          ),
                      ],
                    ),
                  ),
                  flex: 1,
                ),
                /// 富文本评论的输入框
                InputComment(
                  inputKey,
                  hintText,
                  isKeyBoardShow,
                  commentFocus,
                  commentTextController,
                  _toComment,
                  _queryMemberComment,
                  _queryCourseLikes,
                  isLike: course?.selfLiked,
                ),
              ],
            ),
          ),
        ),)
    );
  }

  Widget anthology() {
    return Container(
      color: Colors.white,
      margin: EdgeInsets.only(bottom: 16),
      padding: EdgeInsets.all(16),
      child: Column(
        children: [
          Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Text(
                S.of(context).xuanji,
                style: TextStyle(
                  fontSize: 15.sp,
                  fontWeight: MyFontWeight.medium,
                  color: Color(0xFF1A1A1A),
                ),
              ),
              Text(
                "共${chapterList.length}集",
                style: TextStyle(
                  fontSize: 16.sp,
                  fontWeight: MyFontWeight.regular,
                  color: Color(0xFF1A1A1A),
                ),
              ),
            ],
          ),
          Container(
            height: 70.h,
            margin: EdgeInsets.only(top: 10),
            child: ListView.builder(
              scrollDirection: Axis.horizontal,
              physics: BouncingScrollPhysics(),
              itemCount: chapterList.length,
              itemBuilder: (context, position) {
                return GestureDetector(
                  onTap: () {
                    setState(() {
                      chapterIndex = position;
                      isShowImg = true;
                      ClassDetailsVideoState state = videoKey.currentState;
                      state.initVideo(chapterList[position].content.fileUrl);
                      // initVideo(chapterList[position].content.fileUrl);
                    });
                  },
                  child: classSelectItem(chapterList[position], position),
                );
              },
            ),
          ),
        ],
      ),
    );
  }

  Widget classSelectItem(Chapter chapterList, position) {
    return Container(
      width: 106.w,
      alignment: Alignment.center,
      margin: EdgeInsets.symmetric(
        horizontal: 6.w,
        vertical: 3,
      ),
      padding: EdgeInsets.all(8),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(4),
        color: position == chapterIndex ? Color(0xFF32A060) : Color(0xFFE5E5E5),
      ),
      child: Text(
        chapterList?.name ?? chapterList.name ?? "",
        overflow: TextOverflow.ellipsis,
        maxLines: 2,
        style: TextStyle(
          fontSize: 12.sp,
          fontWeight: MyFontWeight.regular,
          color: position == chapterIndex ? Colors.white : Color(0xFF7C7C7C),
        ),
      ),
    );
  }

  ///课程点赞
  _queryCourseLikes() async {
    BaseData baseData = await apiService
        .courseLikes(widget.arguments["id"])
        .catchError((onError) {});
    if (baseData != null && baseData.isSuccess) {
      setState(() {
        if (course.selfLiked ?? false)
          course.likes -= 1;
        else
          course.likes += 1;
        course.selfLiked = !course.selfLiked ?? false;
      });
      commentKey.currentState.setState(() {});
    } else {
      // SmartDialog.showToast(baseData.msg, alignment: Alignment.center);
    }
  }

  ///发布评论
  _queryMemberComment(String content) async {
    BaseData baseData = await apiService.memberComment({
      "content": content,
      "parentId": parenId,
      "relationalId": widget.arguments["id"],
      "relationalType": 3
    }).catchError((error) {});
    if (baseData != null && baseData.isSuccess) {
      CommentListState state = commentKey.currentState;
      state.queryMemberCommentList();
      commentTextController.text = "";
      FocusScope.of(context).unfocus();
      // _toComment();
    }
  }

  ///滑动到评论列表
  _toComment() {
    if (commentKey.currentContext == null) return;
    RenderBox firstRenderBox = commentKey.currentContext.findRenderObject();
    Offset first = firstRenderBox.localToGlobal(Offset.zero);
    scrollController.animateTo(
      first.dy +
          scrollController.offset -
          (kToolbarHeight + MediaQuery.of(context).padding.top),
      duration: Duration(milliseconds: 300),
      curve: Curves.easeIn,
    );
  }

  ///评论 回复
  _reply(memberComment) {
    FocusScope.of(context).requestFocus(commentFocus);
    parenId = memberComment.id;
    hintText = S.of(context).huifu_("${memberComment.username}");
  }

  ///删除评论
  delComment(memberComment) async {
    BaseData baseData = await apiService.delComment(memberComment.id);
    if (baseData != null && baseData.isSuccess) {
      CommentListState state = commentKey.currentState;
      state.queryMemberCommentList();
    }
  }

  ///删除评论的提示
  _delCommentTips(memberComment) {
    SmartDialog.show(widget: Tips(() {
      delComment(memberComment);
    }));
  }
}