didvan-app/lib/widgets/floating_navigation_bar.dart

import 'package:didvan/config/design_config.dart';
import 'package:didvan/config/theme_data.dart';
import 'package:didvan/constants/app_icons.dart';
import 'package:didvan/models/news_details_data.dart';
import 'package:didvan/models/radar_details_data.dart';
import 'package:didvan/models/view/action_sheet_data.dart';
import 'package:didvan/pages/home/settings/widgets/menu_item.dart';
import 'package:didvan/routes/routes.dart';
import 'package:didvan/utils/action_sheet.dart';
import 'package:didvan/widgets/bookmark_button.dart';
import 'package:didvan/widgets/didvan/divider.dart';
import 'package:didvan/widgets/didvan/icon_button.dart';
import 'package:didvan/widgets/didvan/text.dart';
import 'package:flutter/material.dart';

class FloatingNavigationBar extends StatefulWidget {
  final RadarDetailsData? radar;
  final NewsDetailsData? news;
  final ScrollController scrollController;
  final VoidCallback onMark;
  final VoidCallback onUnmark;
  const FloatingNavigationBar({
    Key? key,
    this.radar,
    this.news,
    required this.scrollController,
    required this.onMark,
    required this.onUnmark,
  }) : super(key: key);

  @override
  State<FloatingNavigationBar> createState() => _FloatingNavigationBarState();
}

class _FloatingNavigationBarState extends State<FloatingNavigationBar> {
  bool get _isRadar => widget.radar != null;
  bool _isScrolled = false;

  get _item => widget.radar ?? widget.news;

  @override
  void didUpdateWidget(covariant FloatingNavigationBar oldWidget) {
    if (widget.radar != null && oldWidget.radar!.id != widget.radar!.id ||
        widget.news != null && oldWidget.news!.id != widget.news!.id) {
      _isScrolled = false;
    }
    super.didUpdateWidget(oldWidget);
  }

  @override
  void initState() {
    widget.scrollController.addListener(() {
      final position = widget.scrollController.position.pixels;
      final offset = MediaQuery.of(context).size.width / 16 * 9 + 40;
      if (position > offset && !_isScrolled) {
        setState(() {
          _isScrolled = true;
        });
      } else if (position < offset && _isScrolled) {
        setState(() {
          _isScrolled = false;
        });
      }
    });
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    final Color foregroundColor = DesignConfig.isDark
        ? Theme.of(context).colorScheme.focusedBorder
        : Theme.of(context).colorScheme.focused;
    return Container(
      margin: const EdgeInsets.only(left: 32, right: 32, bottom: 20),
      padding: const EdgeInsets.symmetric(horizontal: 12),
      width: double.infinity,
      height: 48,
      decoration: BoxDecoration(
        color: Theme.of(context).colorScheme.navigation,
        borderRadius: BorderRadius.circular(24),
        border: DesignConfig.isDark
            ? Border.all(
                color: Theme.of(context).colorScheme.cardBorder,
              )
            : null,
      ),
      child: Theme(
        data: Theme.of(context).copyWith(
          iconTheme: IconThemeData(
            color: foregroundColor,
          ),
        ),
        child: Row(
          children: [
            AnimatedRotation(
              duration: DesignConfig.lowAnimationDuration,
              turns: _isScrolled ? -0.25 : 0,
              child: DidvanIconButton(
                onPressed: () {
                  if (_isScrolled) {
                    widget.scrollController.animateTo(
                      0,
                      duration: DesignConfig.lowAnimationDuration,
                      curve: Curves.easeIn,
                    );
                    return;
                  }
                  Navigator.of(context).pop();
                },
                icon: DidvanIcons.back_regular,
              ),
            ),
            const Spacer(),
            if (_isRadar)
              BookmarkButton(
                value: _item.marked,
                onMark: widget.onMark,
                onUnmark: widget.onUnmark,
              ),
            SizedBox(
              width: 48,
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  if (_item.comments != 0)
                    DidvanText(
                      _item.comments.toString(),
                      color: foregroundColor,
                    ),
                  const SizedBox(width: 4),
                  DidvanIconButton(
                    gestureSize: 32,
                    onPressed: () => Navigator.of(context).pushNamed(
                      Routes.comments,
                      arguments: {
                        'id': _item.id,
                        'isRadar': _isRadar,
                        'title': _item.title
                      },
                    ),
                    icon: DidvanIcons.chats_regular,
                  ),
                ],
              ),
            ),
            if (!_isRadar) const SizedBox(width: 12),
            if (!_isRadar)
              BookmarkButton(
                value: _item.marked,
                onMark: widget.onMark,
                onUnmark: widget.onUnmark,
              ),
            if (_isRadar)
              DidvanIconButton(
                gestureSize: 32,
                onPressed: _showMoreOptions,
                icon: DidvanIcons.menu_regular,
              ),
          ],
        ),
      ),
    );
  }

  void _showMoreOptions() {
    ActionSheetUtils.showBottomSheet(
      data: ActionSheetData(
        content: Column(
          children: [
            MenuItem(
              title: 'ارتباط با سردبیر',
              onTap: () {},
              icon: DidvanIcons.profile_regular,
            ),
            const DidvanDivider(),
            MenuItem(
              title: 'گزارش اشکال',
              onTap: () {},
              icon: DidvanIcons.description_regular,
            ),
          ],
        ),
        title: 'موارد بیشتر',
        withoutButtonMode: true,
      ),
    );
  }
}