adguard-home-manager/lib/screens/settings/dns/comment_modal.dart

import 'package:flutter/material.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart';

class CommentModal extends StatefulWidget {
  final String? comment;
  final void Function(String) onConfirm;

  const CommentModal({
    Key? key,
    this.comment,
    required this.onConfirm
  }) : super(key: key);

  @override
  State<CommentModal> createState() => _CommentModalState();
}

class _CommentModalState extends State<CommentModal> {
  final TextEditingController commentController = TextEditingController();

  bool validData = false;

  @override
  void initState() {
    if (widget.comment != null) {
      commentController.text = widget.comment!.replaceFirst(RegExp(r'#(\s)?'), "");
    }
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: MediaQuery.of(context).viewInsets,
      child: Container(
        height: 310,
        decoration: BoxDecoration(
          borderRadius: const BorderRadius.only(
            topLeft: Radius.circular(28),
            topRight: Radius.circular(28)
          ),
          color: Theme.of(context).dialogBackgroundColor
        ),
        child: Column(
          children: [
            Expanded(
              child: ListView(
                physics: MediaQuery.of(context).size.height >= 330 == true
                  ? const NeverScrollableScrollPhysics()
                  : null,
                children: [
                  Padding(
                    padding: const EdgeInsets.only(top: 24),
                    child: Icon(
                      Icons.comment_rounded,
                      size: 24,
                      color: Theme.of(context).colorScheme.secondary,
                    ),
                  ),
                  const SizedBox(height: 16),
                  Text(
                    AppLocalizations.of(context)!.comment,
                    textAlign: TextAlign.center,
                    style: TextStyle(
                      fontSize: 24,
                      color: Theme.of(context).colorScheme.onSurface
                    ),
                  ),
                  const SizedBox(height: 16),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 24),
                    child: TextFormField(
                      controller: commentController,
                      onChanged: (value) {
                        if (value != '') {
                          setState(() => validData = true);
                        }
                        else {
                          setState(() => validData = false);
                        }
                      },
                      decoration: InputDecoration(
                        prefixIcon: const Icon(Icons.comment_rounded),
                        border: const OutlineInputBorder(
                          borderRadius: BorderRadius.all(
                            Radius.circular(10)
                          )
                        ),
                        labelText: AppLocalizations.of(context)!.comment,
                        helperText: AppLocalizations.of(context)!.commentsDescription,
                        helperMaxLines: 3
                      )
                    ),
                  ),
                ],
              ),
            ),
            Padding(
              padding: const EdgeInsets.all(24),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.end,
                children: [
                  TextButton(
                    onPressed: () => Navigator.pop(context), 
                    child: Text(AppLocalizations.of(context)!.cancel)
                  ),
                  const SizedBox(width: 20),
                  TextButton(
                    onPressed: validData == true 
                      ? () {
                          Navigator.pop(context);
                          widget.onConfirm("# ${commentController.text}");
                        }
                      : null, 
                    child: Text(
                      AppLocalizations.of(context)!.confirm,
                      style: TextStyle(
                        color: validData == true
                          ? Theme.of(context).colorScheme.primary
                          : Colors.grey
                      ),
                    )
                  ),
                ],
              ),
            )
          ],
        ),
      ),
    );
  }
}