SimpleCloudNotifier/flutter/lib/pages/keytoken_view/keytoken_channel_modal.dart

import 'package:flutter/material.dart';
import 'package:simplecloudnotifier/models/channel.dart';
import 'package:simplecloudnotifier/models/keytoken.dart';

class EditKeyTokenChannelsDialog extends StatefulWidget {
  final List<Channel> ownedChannels;
  final KeyTokenPreview keytoken;

  final void Function(Set<String>) onUpdateChannels;
  final void Function() onUpdateSetAllChannels;

  const EditKeyTokenChannelsDialog({
    required this.ownedChannels,
    required this.keytoken,
    required this.onUpdateChannels,
    required this.onUpdateSetAllChannels,
    Key? key,
  }) : super(key: key);

  @override
  _EditKeyTokenChannelsDialogState createState() => _EditKeyTokenChannelsDialogState();
}

class _EditKeyTokenChannelsDialogState extends State<EditKeyTokenChannelsDialog> {
  late bool allChannels;
  late Set<String> selectedEntries;

  @override
  void initState() {
    super.initState();
    allChannels = widget.keytoken.allChannels;
    selectedEntries = (widget.keytoken.channels).toSet();
  }

  @override
  Widget build(BuildContext context) {
    var ownChannels = widget.ownedChannels.toList();
    ownChannels.sort((a, b) => a.displayName.toLowerCase().compareTo(b.displayName.toLowerCase()));

    return AlertDialog(
      title: const Text('Channels'),
      content: Container(
        width: 0,
        height: 400,
        child: Column(
          children: [
            ListTile(
              contentPadding: EdgeInsets.fromLTRB(8, 0, 8, 0),
              visualDensity: VisualDensity(horizontal: 0, vertical: -4),
              title: Text('All Channels'),
              leading: Icon(
                allChannels ? Icons.check_box : Icons.check_box_outline_blank,
                color: Theme.of(context).primaryColor,
              ),
              onTap: () {
                setState(() {
                  allChannels = !allChannels;
                });
              },
            ),
            SizedBox(height: 16),
            if (!allChannels)
              Expanded(
                child: ListView.builder(
                  shrinkWrap: true,
                  itemBuilder: (builder, index) {
                    return ListTile(
                      contentPadding: EdgeInsets.fromLTRB(8, 0, 8, 0),
                      visualDensity: VisualDensity(horizontal: 0, vertical: -4),
                      title: Text(ownChannels[index].displayName),
                      leading: Icon(
                        selectedEntries.contains(ownChannels[index].channelID) ? Icons.check_box : Icons.check_box_outline_blank,
                        color: Theme.of(context).primaryColor,
                      ),
                      onTap: () {
                        setState(() {
                          if (selectedEntries.contains(ownChannels[index].channelID)) {
                            selectedEntries.remove(ownChannels[index].channelID);
                          } else {
                            selectedEntries.add(ownChannels[index].channelID);
                          }
                        });
                      },
                    );
                  },
                  itemCount: ownChannels.length,
                ),
              ),
          ],
        ),
      ),
      actions: <Widget>[
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text('Cancel'),
        ),
        TextButton(
          style: TextButton.styleFrom(textStyle: Theme.of(context).textTheme.labelLarge),
          child: const Text('Update'),
          onPressed: () {
            if (allChannels) {
              widget.onUpdateSetAllChannels();
            } else {
              widget.onUpdateChannels(selectedEntries);
            }
            Navigator.of(context).pop();
          },
        ),
      ],
    );
  }
}