import 'package:appframe/services/dispatcher.dart';
import 'package:url_launcher/url_launcher.dart';

class OpenDocumentHandler extends MessageHandler {
  @override
  Future<dynamic> handleMessage(params) async {
    if (params is! Map<String, dynamic>) {
      throw Exception('参数错误');
    }
    final url = params['url'] as String;
    if (url.isEmpty) {
      throw Exception('参数错误');
    }

    return await _launchInBrowser(Uri.parse(url));
  }

  Future<bool> _launchInBrowser(Uri url) async {
    if (await canLaunchUrl(url)) {
      return await launchUrl(url, mode: LaunchMode.platformDefault);
    } else {
      throw Exception('Could not launch $url');
    }
    /*if (!await launchUrl(url, mode: LaunchMode.externalNonBrowserApplication)) {
      throw Exception('Could not launch $url');
    }*/
  }
}