dach_locator 1.1.2

Given a zip code of Germany, Austria or Switzerland the region is resolved.

example/lib/main.dart

import 'package:dach_locator/dach_locator.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'DACH Locator Demo',
      theme: ThemeData(
        primarySwatch: Colors.green,
      ),
      home: const ZipCodeConverterPage(title: 'DACH Locator Demo'),
    );
  }
}

class ZipCodeConverterPage extends StatefulWidget {
  const ZipCodeConverterPage({super.key, required this.title});

  final String title;

  @override
  State<ZipCodeConverterPage> createState() => _ZipCodeConverterPageState();
}

class _ZipCodeConverterPageState extends State<ZipCodeConverterPage> {
  String _zipCode = '';

  Set<Region> _regions = {};

  late TextEditingController controller;

  @override
  void initState() {
    super.initState();
    controller = TextEditingController();
    controller.addListener(() {
      _zipCode = controller.text;
      if (int.tryParse(_zipCode) != null &&
          _zipCode.length > 3 &&
          _zipCode.length < 6) {
        final regionMatches = _resolveRegion(_zipCode);
        setState(() {
          _regions = regionMatches;
        });
      } else {
        setState(() {
          _regions = {};
        });
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: <Widget>[
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 32),
            child: Row(
              children: [
                const Text(
                  'Enter ZIP Code:',
                ),
                const SizedBox(width: 16),
                Expanded(
                  child: TextField(
                    controller: controller,
                    keyboardType: TextInputType.number,
                  ),
                ),
              ],
            ),
          ),
          const SizedBox(
            height: 32,
          ),
          for (final region in _regions) ...[
            if (region.regionName != null)
              Text(
                region.regionName!,
                style: Theme.of(context).textTheme.headlineMedium,
              ),
            if (region.regionName != null && region.countryName != null)
              Text(
                region.countryName!,
                style: Theme.of(context).textTheme.headlineSmall,
              ),
          ]
        ],
      ),
    );
  }

  Set<Region> _resolveRegion(String zipCode, {String? countryCode}) {
    if (int.tryParse(zipCode) != null &&
        zipCode.length > 3 &&
        zipCode.length < 6) {
      final regions = getRegion(zipCode, countryCode: countryCode);
      return regions;
    }
    return {};
  }
}