harmony/features/netease/src/main/ets/view/TuwenComp.ets

import { BasicConstant, EmptyViewComp, hdHttp, HdLoadingDialog, HdNav, HdResponse, HdSearchNav } from '@itcast/basic'
import { HMRouter, HMRouterMgr, HMRouterPathCallback, HMRouterPathInfo } from '@hadss/hmrouter'
import { PullToRefreshLayout, RefreshController } from 'refreshlib'
import { HashMap } from '@kit.ArkTS';
import { BusinessError } from '@kit.BasicServicesKit';
import { PatientTBean, TeachModel } from '@itcast/basic/src/main/ets/models/TeachModel';
import { promptAction } from '@kit.ArkUI';
import { ItemCompTeach } from '../components/ItemCompTeach';
import { StringIsEmpty } from '@nimkit/common';

@HMRouter({ pageUrl: 'TuwenCompPage' })
@Component
export struct TuwenComp {
  dialog: CustomDialogController = new CustomDialogController({
    builder: HdLoadingDialog({ message: '加载中...' }),
    customStyle: true,
    alignment: DialogAlignment.Center
  })
  @State pageNumber:number = 1;
  @State totalPageNumer:number = 1;
  @State data:PatientTBean[]=[];
  @State isEmptyViewVisible: boolean = false; // 控制显隐的状态变量
  aboutToAppear() {
    this.getApplyList();
  }
  getApplyList() {
    const hashMap: HashMap<string, string> = new HashMap();
    hashMap.set('page',this.pageNumber.toString());
    hashMap.set("type", this.sort);
    hashMap.set("keywords", this.inputText);
    this.dialog.open()
    hdHttp.httpReq<string>(BasicConstant.polularScienceArticleListByKeywordsNew,hashMap).then(async (res: HdResponse<string>) => {
      this.dialog.close();
      let json:TeachModel = JSON.parse(res+'') as TeachModel;
      if(json.code == '1') {
        if(this.pageNumber==1)
        {
          this.data=[]
          if(json.data!=null)
          {
            this.data = json.data;
          }

        }
        else if(this.pageNumber>1)
        {
          this.data.push(...json.data)
        }

        this.totalPageNumer =json.totalPage;
        if (this.data.length > 0) {
          this.isEmptyViewVisible = false;
        } else  {
          this.isEmptyViewVisible = true;
        }
      } else {

        promptAction.showToast({ message: json.message, duration: 1000 })
      }
    }).catch((err: BusinessError) => {
      this.dialog.close();
      this.controller.refreshError();
      console.info(`Response fails: ${err}`);
    })
  }
  public controller:RefreshController = new RefreshController();
  scroller = new Scroller();
  @State Sorts:string='最新'
  @State Imgs:ResourceStr=$r('app.media.cb_new')
  @State inputText:string=''
  @State
  @Watch('onRefresh')
  sort:string='1'

  onRefresh()
  {
    this.pageNumber = 1;
    this.getApplyList();
  }
  build() {
   Column(){
     HdNav({ title: '患教学堂', showRightIcon: false, showLeftIcon: true , isLeftAction:true,leftItemAction:()=>{
       HMRouterMgr.pop()
     }})

     Row() {
       Row() {
         Image($r('app.media.search_no')).width(15).height(15).margin({ right:5 })
         Text('搜索').fontSize(14).fontColor($r('app.color.common_gray_03')).textAlign(TextAlign.Start)


       }
       .layoutWeight(1)
       .justifyContent(FlexAlign.Center)
       .onClick(()=>{
         const pathInfo1: HMRouterPathInfo = {
           pageUrl: 'SearchComp',
           param:{type:'tuwen'}

         };
         const callback: HMRouterPathCallback = {
           onResult: (popInfo: PopInfo) => {
             const result = popInfo.result as string;
             if(!StringIsEmpty(result))
             {
               HMRouterMgr.pop({param:result})
             }

             // this.sendHelloMessage(result,BasicConstant.Teach);
           }
         };
         HMRouterMgr.push(pathInfo1,callback)
         // HMRouterMgr.push({ pageUrl: 'SearchComp' })
       })

       Text('|').fontColor($r('app.color.tab_text_nor'))
         .fontSize(13)

       Row() {
         Text(this.Sorts).fontSize(14).fontColor($r('app.color.common_gray_03')).textAlign(TextAlign.Start)
           .margin({ left:5 })
         Image(this.Imgs).width(15).height(15)
       }
       .layoutWeight(1)
       .justifyContent(FlexAlign.Center)
       .onClick(()=>{
         if(this.Sorts=='最新')
         {
           this.sort='2'
           this.Sorts='最热'
           this.Imgs=$r('app.media.cb_hot')
         }
         else
         {
           this.sort='1'
           this.Sorts='最新'
           this.Imgs=$r('app.media.cb_new')
         }
       })

     }.width('100%').height(45)
     Text().height(5).width('100%').backgroundColor($r('app.color.home_gray'))
     if (this.isEmptyViewVisible){
       EmptyViewComp({promptText:'暂无数据',isVisibility:this.isEmptyViewVisible}).layoutWeight(1)

     }
     else
     {
       PullToRefreshLayout({
         scroller:this.scroller,
         viewKey:"ListPage",
         controller:this.controller,
         contentView:()=>{
           this.contentView()
         },

         onRefresh:()=>{
           this.pageNumber = 1;
           this.getApplyList();
           setTimeout(() => {
             this.controller.refreshSuccess()
           }, 1000)
         },
         onCanPullRefresh:()=>{
           if (!this.scroller.currentOffset()) {
             /*处理无数据，为空的情况*/
             return true
           }
           //如果列表到顶，返回true，表示可以下拉，返回false，表示无法下拉
           return this.scroller.currentOffset().yOffset <= 0
         },
         onLoad:()=>{
           this.pageNumber++;
           this.getApplyList();
           setTimeout(() => {
             this.controller.loadSuccess()
           }, 1000)

         },
         onCanPullLoad: () => {
           if (this.pageNumber >= this.totalPageNumer) {
             return false;
           } else {
             return true;
           }
         }
       }).width('100%').layoutWeight(1).clip(true)
     }

   }
   .width('100%')
    .height('100%')
  }

  @Builder
  contentView(){
    List({ scroller: this.scroller }) {
      ForEach(this.data, (item: PatientTBean, index) => {
        ListItem() {
          ItemCompTeach({item:item})
        }
      })
    }
    .width('100%')
    .height('100%')
    .edgeEffect(EdgeEffect.None)

  }


}