Solian/lib/screens/feed/draft_box.dart

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
import 'package:solian/models/feed.dart';
import 'package:solian/models/pagination.dart';
import 'package:solian/models/post.dart';
import 'package:solian/providers/content/feed.dart';
import 'package:solian/screens/feed.dart';
import 'package:solian/theme.dart';
import 'package:solian/widgets/app_bar_title.dart';
import 'package:solian/widgets/posts/post_action.dart';
import 'package:solian/widgets/posts/post_owned_list.dart';
import 'package:solian/widgets/prev_page.dart';

class DraftBoxScreen extends StatefulWidget {
  const DraftBoxScreen({super.key});

  @override
  State<DraftBoxScreen> createState() => _DraftBoxScreenState();
}

class _DraftBoxScreenState extends State<DraftBoxScreen> {
  final PagingController<int, FeedRecord> _pagingController =
      PagingController(firstPageKey: 0);

  getPosts(int pageKey) async {
    final FeedProvider provider = Get.find();

    Response resp;
    try {
      resp = await provider.listDraft(pageKey);
    } catch (e) {
      _pagingController.error = e;
      return;
    }

    final PaginationResult result = PaginationResult.fromJson(resp.body);
    if (result.count == 0) {
      _pagingController.appendLastPage([]);
      return;
    }

    final parsed = result.data?.map((e) => FeedRecord.fromJson(e)).toList();
    if (parsed != null && parsed.length >= 10) {
      _pagingController.appendPage(parsed, pageKey + parsed.length);
    } else if (parsed != null) {
      _pagingController.appendLastPage(parsed);
    }
  }

  @override
  void initState() {
    super.initState();
    _pagingController.addPageRequestListener(getPosts);
  }

  @override
  Widget build(BuildContext context) {
    return Material(
      color: Theme.of(context).colorScheme.surface,
      child: Scaffold(
        appBar: AppBar(
          title: AppBarTitle('draftBox'.tr),
          centerTitle: false,
          toolbarHeight: SolianTheme.toolbarHeight(context),
          leading: const PrevPageButton(),
          actions: [
            FeedCreationButton(
              hideDraftBox: true,
              onCreated: () {},
            ),
            SizedBox(
              width: SolianTheme.isLargeScreen(context) ? 8 : 16,
            ),
          ],
        ),
        body: RefreshIndicator(
          onRefresh: () => Future.sync(() => _pagingController.refresh()),
          child: PagedListView<int, FeedRecord>(
            pagingController: _pagingController,
            builderDelegate: PagedChildBuilderDelegate(
              itemBuilder: (context, item, index) {
                switch (item.type) {
                  case 'post':
                    final data = Post.fromJson(item.data);
                    return PostOwnedListEntry(
                      item: data,
                      onTap: () async {
                        showModalBottomSheet(
                          useRootNavigator: true,
                          context: context,
                          builder: (context) => PostAction(
                            item: data,
                            noReact: true,
                          ),
                        ).then((value) {
                          if (value != null) _pagingController.refresh();
                        });
                      },
                    ).paddingOnly(left: 12, right: 12, bottom: 4);
                  default:
                    return const SizedBox();
                }
              },
            ),
          ),
        ),
      ),
    );
  }

  @override
  void dispose() {
    _pagingController.dispose();
    super.dispose();
  }
}