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 StatelessWidget {
  final String? comment;
  final void Function(String) onConfirm;
  final bool dialog;

  const CommentModal({
    super.key,
    this.comment,
    required this.onConfirm,
    required this.dialog
  });

  @override
  Widget build(BuildContext context) {
    if (dialog == true) {
      return Dialog(
        child: ConstrainedBox(
          constraints: const BoxConstraints(
            maxWidth: 400
          ),
          child: _Content(
            comment: comment,
            onConfirm: onConfirm,
          )
        ),
      );
    }
    else {
      return Padding(
        padding: MediaQuery.of(context).viewInsets,
        child: Container(
          decoration: BoxDecoration(
            borderRadius: const BorderRadius.only(
              topLeft: Radius.circular(28),
              topRight: Radius.circular(28)
            ),
            color: Theme.of(context).dialogBackgroundColor
          ),
          child: SafeArea(
            child: _Content(
              comment: comment,
              onConfirm: onConfirm,
            ),
          )
        ),
      );
    }
  }
}

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

  const _Content({
    required this.comment,
    required this.onConfirm
  });

  @override
  State<_Content> createState() => __ContentState();
}

class __ContentState extends State<_Content> {
  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 Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        Flexible(
          child: SingleChildScrollView(
            child: Wrap(
              children: [
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    Column(
                      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
                  ),
                )
              ),
            ],
          ),
        )
      ],
    );
  }
}