app/lib/paegs/mine_page/advertising_page/advertising_page.dart

import 'dart:convert';

import 'package:bbyyy/beans/ad_bean_entity.dart';
import 'package:bbyyy/https/MyDio.dart';
import 'package:bbyyy/my_tools/dims.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/ad_details_page/ad_details_page.dart';
import 'package:flutter/material.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';

import 'new_ad_page.dart';

class AdvertisingPage extends StatefulWidget {
  @override
  _AdvertisingPageState createState() => _AdvertisingPageState();
}

class _AdvertisingPageState extends State<AdvertisingPage> {
  RefreshController controller = RefreshController(initialRefresh: true);
  List<AdBeanDataData> data = [];
  int page = 1;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Column(
        children: [
          MyViews().myAppBar('广告', context, [
            IconButton(
                icon: Icon(Icons.add_circle_outline),
                onPressed: () {
                  MyTools().toPage(context, NewAdPage(null), (then) {
                    page = 1;
                    controller.requestRefresh();
                  });
                }),
          ]),
          Expanded(
            child: SmartRefresher(
              onRefresh: onRefresh,
              onLoading: onLoading,
              enablePullUp: true,
              enablePullDown: true,
              controller: controller,
              child: data.length == 0
                  ? SingleChildScrollView(child: noData())
                  : GridView.builder(
                      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
                          crossAxisCount: 2,
                          childAspectRatio: 164 / 260,
                          mainAxisSpacing: 11,
                          crossAxisSpacing: 15),
                      itemCount: data.length,
                      padding: EdgeInsets.all(16),
                      itemBuilder: (context, index) {
                        return GestureDetector(
                          child: advertisingItems(context, data[index]),
                          onTap: () {
                            MyTools().toPage(
                                context,
                                AdDetailsPage(
                                  data[index],
                                  canBeModified: true,
                                ), (then) {
                              page = 1;
                              controller.requestRefresh();
                            });
                          },
                          behavior: HitTestBehavior.translucent,
                        );
                      }),
            ),
          ),
        ],
      ),
    );
  }

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

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

  checkMyAd() {
    MyDio().query({
      "key": "ad",
      "filters": {
        "conditions": ['user_uid == ${MyCookie().getUID()}']
      },
      "dims": adDims,
      "paging": [page, 20],
      "order_by": ["create_time,DESC"]
    }, (response, hasError) {
      if (!hasError) {
        AdBeanEntity entity =
            AdBeanEntity().fromJson(json.decode(response.data.toString()));
        if (page == 1) {
          data.clear();
        }
        data.addAll(entity.data.data);
        setState(() {});
      }
      endRe(controller);
    }, (error) {});
  }
}