course-work/lib/ui/itemspage.dart

import 'package:cubit_form/cubit_form.dart';
import 'package:flutter/material.dart';
import 'package:selfprivacy/logic/itemscubit.dart';
import 'package:selfprivacy/models/item.dart';

part 'item.dart';

class ItemsPage extends StatelessWidget {
  const ItemsPage({super.key});

  @override
  Widget build(final BuildContext context) {
    final Widget child = BlocBuilder<ItemsCubit, ItemsState>(
      builder: (final BuildContext context, final ItemsState state) {
        final List<Item> items = state.items;

        if (items.isEmpty) {
          if (state.isLoading) {
            return const Center(
              child: CircularProgressIndicator(),
            );
          }
          return RefreshIndicator(
            onRefresh: () async {
              context.read<ItemsCubit>().refresh();
            },
            child: Container(
              padding: const EdgeInsets.symmetric(horizontal: 15),
              child: Center(
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    ConstrainedBox(
                      constraints: const BoxConstraints(
                        minHeight: 40,
                        minWidth: double.infinity,
                      ),
                      child: OutlinedButton(
                        onPressed: () {
                          context.read<ItemsCubit>().refresh();
                        },
                        child: Text(
                          'Обновить',
                          style: Theme.of(context).textTheme.button?.copyWith(
                                color: Theme.of(context).colorScheme.primary,
                              ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          );
        }

        return RefreshIndicator(
          onRefresh: () async {
            context.read<ItemsCubit>().refresh();
          },
          child: ListView.builder(
            itemCount: items.length,
            itemBuilder: (final BuildContext context, final int index) => _Item(
              item: items[index],
            ),
          ),
        );
      },
    );

    return Scaffold(
      appBar: PreferredSize(
        preferredSize: const Size.fromHeight(52),
        child: AppBar(
          title: const Padding(
            padding: EdgeInsets.only(top: 4.0),
            child: Text('Товары'),
          ),
        ),
      ),
      body: child,
    );
  }
}