app/lib/paegs/chat_page/chat_page.dart

import 'dart:convert';

import 'package:bbyyy/beans/goods_bean_entity.dart';
import 'package:bbyyy/beans/message_bean_entity.dart';
import 'package:bbyyy/beans/my_shop_bean_entity.dart';
import 'package:bbyyy/beans/user_vp_bean_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/msgDB/my_msg_db.dart';
import 'package:bbyyy/my_tools/const.dart';
import 'package:bbyyy/my_tools/dims.dart';
import 'package:bbyyy/my_tools/ev.dart';
import 'package:bbyyy/my_tools/event_bus.dart';
import 'package:bbyyy/my_tools/my_colors.dart';
import 'package:bbyyy/my_tools/my_cookie.dart';
import 'package:bbyyy/my_tools/my_tools.dart';
import 'package:bbyyy/my_tools/my_views.dart';
import 'package:bbyyy/paegs/chat_page/chat_data.dart';
import 'package:bbyyy/paegs/chat_page/chat_page_view.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:scroll_to_index/scroll_to_index.dart';

class ChatPage extends StatefulWidget {
  MyShopBeanDataData chatWith;
  GoodsBeanDataData goods;

  ChatPage(this.chatWith, this.goods) {
    ChatData().chatWith = chatWith;
  }

  @override
  _ChatPageState createState() => _ChatPageState();
}

class _ChatPageState extends State<ChatPage> {
  FocusNode _focusNode = FocusNode();
  AutoScrollController _scrollController;
  RefreshController _refreshController =
      RefreshController(initialRefresh: true);
  int page = 1;
  List<MessageBeanContent> msges = [];

  @override
  void initState() {
    super.initState();
    ChatData().context = context;
    _scrollController = AutoScrollController(
        viewportBoundaryGetter: () =>
            Rect.fromLTRB(0, 0, 0, MediaQuery.of(context).padding.bottom),
        axis: Axis.vertical);
    EventBus().on('hasNewMsg', (arg) {
      queryMessage();
    });
    watermarkQuery();
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        MyTools().hideKeyboard(context);
      },
      behavior: HitTestBehavior.translucent,
      child: Scaffold(
        body: Column(
          children: [
            MyViews().myAppBar(
                widget.chatWith.userUid == 0 ? '客服' : widget.chatWith.userName,
                context, []),
            // ChatPageView().goodsInfo(widget.goods),
            Expanded(
              child: Container(
                color: MyColors.cf2f2f2,
                child: SmartRefresher(
                  enablePullDown: true,
                  onLoading: onLoading,
                  onRefresh: onRefresh,
                  footer: CustomFooter(
                    loadStyle: LoadStyle.ShowWhenLoading,
                    builder: (context, mode) {
                      if (mode == LoadStatus.loading) {
                        return Container(
                          height: 60.0,
                          child: Container(
                            height: 20.0,
                            width: 20.0,
                            child: CupertinoActivityIndicator(),
                          ),
                        );
                      } else
                        return Container();
                    },
                  ),
                  enablePullUp: true,
                  controller: _refreshController,
                  child: Scrollable(
                    controller: _scrollController,
                    axisDirection: AxisDirection.up,
                    viewportBuilder: (context, offset) {
                      return ExpandedViewport(
                        offset: offset,
                        axisDirection: AxisDirection.up,
                        slivers: <Widget>[
                          SliverExpanded(),
                          SliverList(
                            delegate: SliverChildBuilderDelegate(
                                (c, i) =>
                                    ChatPageView().chatItems(msges[i], context),
                                childCount: msges.length),
                          )
                        ],
                      );
                    },
                  ),
                ),
              ),
            ),
            ChatPageView().inputBox(context, _focusNode)
          ],
        ),
      ),
    );
  }

  void onLoading() {
    page++;
    queryMessage();
  }

  void onRefresh() {
    page = 1;
    queryMessage();
  }

  queryMessage() async {
    MsgDB msgDB =
        MsgDB('table${MyCookie().getUID()}_${widget.chatWith.userUid}');
    if (!msgDB.isTableExits) {
      await msgDB.open();
    }
    List<Map<String, dynamic>> maps = await msgDB.queryTableData(page, 10);
    if (page == 1) {
      msges.clear();
    }
    maps.forEach((element) {
      MessageBeanContent msg =
          MessageBeanContent().fromJson(json.decode(json.encode(element)));
      msges.add(msg);
      ChatData().msges = msges;
    });
    endRe(_refreshController);
    setState(() {});
  }

  @override
  void dispose() {
    super.dispose();
    ChatData().clean();
    MyCookie().plugin.removeWatermark();
    MyCookie().prefs.setString(
        '${MyCookie().getUID()}_${widget.chatWith.userUid}',
        DateTime.now().toString().substring(0, 19));
  }

  void watermarkQuery() {
    print('asdasdasd---------------${json.encode(widget.chatWith)}');

    MyDio().query({
      "key": "user_vp",
      "filters": {
        "conditions": [
          "user_uid == ${widget.chatWith.userUid}",
          "vp_key == $vpKeyChatWaterMark"
        ]
      },
      "dims": userVpDims,
      "paging": [1, 2000]
    }, (response, hasError) {
      UserVpBeanEntity entity =
          UserVpBeanEntity().fromJson(json.decode(response.data.toString()));
      if (entity.data.data.length != 0) {
        MyCookie().plugin.addWatermark(context, "${MyCookie().getUID()}",
            rowCount: 4, columnCount: 8);
        print('asdfnfansfionasifnioasfn');
      } else {
        watermarkQuery2();
        print('41515115151');
      }
      setState(() {});
    }, (error) {});
  }

  void watermarkQuery2() {
    MyDio().query({
      "key": "user_vp",
      "filters": {
        "conditions": [
          "user_uid == ${MyCookie().getUID()}",
          "vp_key == $vpKeyChatWaterMark"
        ]
      },
      "dims": userVpDims,
      "paging": [1, 2000]
    }, (response, hasError) {
      UserVpBeanEntity entity =
          UserVpBeanEntity().fromJson(json.decode(response.data.toString()));
      if (entity.data.data.length != 0) {
        MyCookie().plugin.addWatermark(context, "${MyCookie().getUID()}",
            rowCount: 4, columnCount: 8);
        print('asdfnfansfionasifnioasfn');
      } else {
        print('41515115151');
      }
      setState(() {});
    }, (error) {});
  }
}