momo/lib/material/gallery.dart

import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';
import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
import 'package:momo/models/image_list_resp.dart';
import 'package:momo/models/image_resp.dart';
import 'package:momo/provider/rerender.dart';
import 'package:momo/request/http_client.dart';
import 'package:url_launcher/url_launcher.dart';

class Gallery extends ConsumerWidget {
  const Gallery({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    UniqueKey key = ref.watch(uniqueIdProvider);
    return Container(
      color: Colors.white,
      child: ImageGrid(
        key: key,
      ),
    );
  }
}

class ImageGrid extends StatefulWidget {
  const ImageGrid({Key? key}) : super(key: key);

  @override
  State<ImageGrid> createState() => _ImageGridState();
}

class _ImageGridState extends State<ImageGrid> {
  int pageSize = 10;

  final PagingController<int, ImageResp> _pagingController =
      PagingController(firstPageKey: 1);

  Future<void> _fetchPage(int pageKey) async {
    try {
      final resp = await dio.get("/image/history",
          queryParameters: {"page": pageKey, "size": pageSize});
      ImageListResp imageListResp = ImageListResp.fromJson(resp.data);
      final newItems = imageListResp.list;
      final isLastPage = !imageListResp.hasNext;
      if (isLastPage) {
        _pagingController.appendLastPage(newItems);
      } else {
        final nextPageKey = pageKey + 1;
        _pagingController.appendPage(newItems, nextPageKey);
      }
    } catch (error) {
      _pagingController.error = error;
    }
  }

  @override
  void initState() {
    // TODO: implement initState
    _pagingController.addPageRequestListener((pageKey) {
      _fetchPage(pageKey);
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return RefreshIndicator(
        child: PagedGridView(
          pagingController: _pagingController,
          builderDelegate: PagedChildBuilderDelegate<ImageResp>(
              itemBuilder: (context, item, index) => ImageItem(image: item)),
          gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
              crossAxisCount: MediaQuery.of(context).size.width > 640 ? 5 : 3),
        ),
        onRefresh: () => Future.sync(() => _pagingController.refresh()));
  }
}

class ImageItem extends ConsumerStatefulWidget {
  const ImageItem({Key? key, required this.image}) : super(key: key);
  final ImageResp image;

  @override
  ConsumerState<ImageItem> createState() => _ImageItemState();
}

class _ImageItemState extends ConsumerState<ImageItem> {
  Future<void> _launchInBrowser(Uri url) async {
    if (!await launchUrl(
      url,
      mode: LaunchMode.externalApplication,
    )) {
      throw Exception('Could not launch $url');
    }
  }

  @override
  Widget build(BuildContext context) {
    return CupertinoContextMenu.builder(
      enableHapticFeedback: true,
      actions: [
        CupertinoContextMenuAction(
          trailingIcon: CupertinoIcons.delete,
          onPressed: () {
            Navigator.of(context, rootNavigator: true).pop();
            Clipboard.setData(ClipboardData(
                text:
                    "https://raichi.hodokencho.com/api/image/${widget.image.file_path}"));
            ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
              content: Row(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  Icon(
                    Icons.check_circle,
                    color: Colors.white,
                  ),
                  SizedBox(
                    width: 10,
                  ),
                  Text("已拷贝到剪贴板")
                ],
              ),
              backgroundColor: Colors.lightGreen,
            ));
          },
          child: const Text('复制链接'),
        ),
        CupertinoContextMenuAction(
          trailingIcon: CupertinoIcons.search,
          onPressed: () {
            Navigator.of(context, rootNavigator: true).pop();
            final imageUrl =
                "https://raichi.hodokencho.com/api/image/${widget.image.file_path}";
            final launchUrl =
                "https://saucenao.com/search.php?url=${Uri.encodeComponent(imageUrl)}";
            _launchInBrowser(Uri.parse(launchUrl));
          },
          child: const Text('在SauceNAO中搜索'),
        ),
      ],
      builder: (BuildContext context, Animation<double> animation) {
        return GestureDetector(
          onTap: () {
            Navigator.of(
              context,
            ).maybePop();
            Future.delayed(const Duration(milliseconds: 120)).then((value) {
              context.go(Uri(
                  path: "/detail",
                  queryParameters: {"id": "${widget.image.id}"}).toString());
            });
          },
          child: Image.network(
            kIsWeb
                ? "/images-api/?url=${dio.options.baseUrl}/image/${widget.image.file_path}&w=512"
                : 'https://raichi.hodokencho.com/images-api/?url=${dio.options.baseUrl}/image/${widget.image.file_path}&w=512',
            fit: BoxFit.cover,
            errorBuilder: (BuildContext context, o, err) {
              return const Icon(Icons.error_outline);
            },
          ),
        );
      },
    );
  }
}