didvan-app/lib/widgets/didvan/page_view.dart

import 'package:carousel_slider/carousel_slider.dart';
import 'package:didvan/pages/home/widgets/multitype_overview.dart';
import 'package:didvan/utils/date_time.dart';
import 'package:didvan/widgets/didvan/card.dart';
import 'package:didvan/widgets/didvan/divider.dart';
import 'package:didvan/widgets/didvan/text.dart';
import 'package:didvan/widgets/item_title.dart';
import 'package:didvan/widgets/skeleton_image.dart';
import 'package:didvan/pages/home/widgets/tag_item.dart';
import 'package:flutter/material.dart';
import 'package:flutter_html/flutter_html.dart';

class DidvanPageView extends StatefulWidget {
  final List items;
  final int initialIndex;
  final int currentIndex;
  final bool isRadar;
  final ScrollController scrollController;

  final void Function(int index) onPageChanged;
  const DidvanPageView({
    Key? key,
    required this.initialIndex,
    required this.items,
    required this.scrollController,
    required this.onPageChanged,
    required this.isRadar,
    required this.currentIndex,
  }) : super(key: key);

  @override
  State<DidvanPageView> createState() => _DidvanPageViewState();
}

class _DidvanPageViewState extends State<DidvanPageView> {
  @override
  Widget build(BuildContext context) {
    final double deviceTopPadding = MediaQuery.of(context).padding.top;
    return Directionality(
      textDirection: TextDirection.ltr,
      child: CarouselSlider.builder(
        itemCount: widget.items.length,
        options: CarouselOptions(
          onPageChanged: (index, reason) => widget.onPageChanged(index),
          height: double.infinity,
          initialPage: widget.initialIndex,
          viewportFraction: 0.94,
          enableInfiniteScroll: false,
        ),
        itemBuilder: (context, index, realIndex) => Directionality(
          textDirection: TextDirection.rtl,
          child: SizedBox(
            height: MediaQuery.of(context).size.height,
            child: SingleChildScrollView(
              controller:
                  index == widget.currentIndex ? widget.scrollController : null,
              physics: const BouncingScrollPhysics(),
              padding: EdgeInsets.only(
                left: 4,
                right: 4,
                top: 16 + deviceTopPadding,
                bottom: 92,
              ),
              child: DidvanCard(
                padding: EdgeInsets.zero,
                enableBorder: false,
                child: Builder(
                  builder: (context) {
                    final item = widget.items[index];
                    if (item == null) {
                      return const SizedBox();
                    }
                    return Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        SkeletonImage(
                          imageUrl: item.image,
                          aspectRatio: 16 / 9,
                        ),
                        const SizedBox(height: 20),
                        Padding(
                          padding: const EdgeInsets.symmetric(horizontal: 16),
                          child: DidvanText(
                            item.title,
                            style: Theme.of(context).textTheme.subtitle1,
                          ),
                        ),
                        const SizedBox(height: 8),
                        Padding(
                          padding: const EdgeInsets.symmetric(horizontal: 16),
                          child: _subtitle(item),
                        ),
                        for (var i = 0; i < item.contents.length; i++)
                          Padding(
                            padding: const EdgeInsets.symmetric(
                              horizontal: 16,
                              vertical: 4,
                            ),
                            child: _contentBuilder(item, i),
                          ),
                        if (item.tags.isNotEmpty) const SizedBox(height: 20),
                        Padding(
                          padding: const EdgeInsets.symmetric(horizontal: 16),
                          child: Wrap(
                            spacing: 8,
                            runSpacing: 8,
                            children: [
                              for (var i = 0; i < item.tags.length; i++)
                                TagItem(label: item.tags[i].label),
                            ],
                          ),
                        ),
                        const Padding(
                          padding: EdgeInsets.only(
                            left: 16,
                            right: 16,
                            top: 16,
                          ),
                          child: DidvanDivider(verticalPadding: 0),
                        ),
                        const Padding(
                          padding: EdgeInsets.symmetric(horizontal: 16.0),
                          child: ItemTitle(title: 'مطالب مشابه'),
                        ),
                        if (item.relatedContents.isEmpty)
                          for (var i = 0; i < 3; i++)
                            Padding(
                              padding: const EdgeInsets.only(
                                bottom: 8,
                                left: 16,
                                right: 16,
                              ),
                              child: MultitypeOverview.placeholder,
                            ),
                        for (var i = 0; i < item.relatedContents.length; i++)
                          Padding(
                            padding: const EdgeInsets.only(
                              bottom: 8,
                              left: 16,
                              right: 16,
                            ),
                            child: MultitypeOverview(
                              item: item.relatedContents[i],
                              onMarkChanged: (id, value) {},
                            ),
                          ),
                        const SizedBox(height: 8),
                      ],
                    );
                  },
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }

  Widget _contentBuilder(dynamic item, int index) {
    final content = item.contents[index];
    if (content.text != null) {
      return Html(
        data: content.text,
        style: {
          '*': Style(
            direction: TextDirection.rtl,
            lineHeight: LineHeight.percent(135),
            // textAlign: TextAlign.justify,
            margin: EdgeInsets.zero,
            padding: EdgeInsets.zero,
          ),
        },
      );
    }
    if (content.image != null) {
      return SkeletonImage(
        imageUrl: content.image!,
        aspectRatio: 16 / 9,
      );
    }
    return const SizedBox();
  }

  Widget _subtitle(dynamic item) {
    if (widget.isRadar) {
      return Wrap(
        crossAxisAlignment: WrapCrossAlignment.center,
        children: [
          DidvanText(
            'رادار ',
            style: Theme.of(context).textTheme.caption,
          ),
          for (var i = 0; i < item.categories.length; i++)
            DidvanText(
              item.categories[i].label +
                  '${i != item.categories.length - 1 ? '،' : ''} ',
              style: Theme.of(context).textTheme.caption,
            ),
          DidvanText(
            ' - ' + DateTimeUtils.momentGenerator(item.createdAt),
            style: Theme.of(context).textTheme.caption,
          ),
        ],
      );
    } else {
      return Row(
        children: [
          DidvanText(
            item.reference,
            style: Theme.of(context).textTheme.caption,
          ),
          DidvanText(
            ' - ' + DateTimeUtils.momentGenerator(item.createdAt),
            style: Theme.of(context).textTheme.caption,
          ),
        ],
      );
    }
  }
}