adguard-home-manager/lib/screens/settings/dns_rewrites/add_dns_rewrite_modal.dart

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

import 'package:adguard_home_manager/models/rewrite_rules.dart';

class AddDnsRewriteModal extends StatefulWidget {
  final void Function(RewriteRulesData) onConfirm;

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

  @override
  State<AddDnsRewriteModal> createState() => _AddDnsRewriteModalState();
}

class _AddDnsRewriteModalState extends State<AddDnsRewriteModal> {
  final TextEditingController domainController = TextEditingController();
  String? domainError;
  final TextEditingController answerController = TextEditingController();

  bool validData = false;

  void validateDomain(String value) {
    final domainRegex = RegExp(r'^([a-z0-9|-]+\.)*[a-z0-9|-]+\.[a-z]+$');
    if (domainRegex.hasMatch(value)) {
      setState(() => domainError = null);
    }
    else {
      setState(() => domainError = AppLocalizations.of(context)!.domainNotValid);
    }
    checkValidValues();
  }

  void checkValidValues() {
    if (
      domainController.text != '' &&
      domainError == null &&
      answerController.text != ''
    ) {
      setState(() => validData = true);
    }
    else {
      setState(() => validData = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: MediaQuery.of(context).viewInsets,
      child: Container(
        height: 400,
        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: 410 < MediaQuery.of(context).size.height
                  ? const NeverScrollableScrollPhysics() 
                  : null,
                children: [
                  Padding(
                    padding: const EdgeInsets.only(top: 24),
                    child: Icon(
                      Icons.add,
                      size: 24,
                      color: Theme.of(context).listTileTheme.iconColor
                    ),
                  ),
                  const SizedBox(height: 16),
                  Text(
                    AppLocalizations.of(context)!.addDnsRewrite,
                    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: domainController,
                      onChanged: validateDomain,
                      decoration: InputDecoration(
                        prefixIcon: const Icon(Icons.link_rounded),
                        border: const OutlineInputBorder(
                          borderRadius: BorderRadius.all(
                            Radius.circular(10)
                          )
                        ),
                        errorText: domainError,
                        labelText: AppLocalizations.of(context)!.domain,
                      ),
                    ),
                  ),
                  const SizedBox(height: 30),
                  Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 24),
                    child: TextFormField(
                      controller: answerController,
                      onChanged: (_) => checkValidValues(),
                      decoration: InputDecoration(
                        prefixIcon: const Icon(Icons.system_update_alt_rounded),
                        border: const OutlineInputBorder(
                          borderRadius: BorderRadius.all(
                            Radius.circular(10)
                          )
                        ),
                        labelText: AppLocalizations.of(context)!.answer,
                      ),
                    ),
                  ),
                ],
              ),
            ),
            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(
                          RewriteRulesData(
                            domain: domainController.text, 
                            answer: answerController.text
                          )
                        );
                      }
                      : null,
                    child: Text(
                      AppLocalizations.of(context)!.confirm,
                      style: TextStyle(
                        color: validData == true
                          ? Theme.of(context).colorScheme.primary
                          : Theme.of(context).colorScheme.onSurface.withOpacity(0.38)
                      ),
                    ),
                  ),
                ],
              ),
            )
          ],
        ),
      ),
    );
  }
}