shlink-manager/lib/views/opensource_licenses_view.dart

import 'package:flutter/material.dart';
import 'package:shlink_app/util/license.dart';
import 'package:url_launcher/url_launcher.dart';

class OpenSourceLicensesView extends StatefulWidget {
  const OpenSourceLicensesView({super.key});

  @override
  State<OpenSourceLicensesView> createState() => _OpenSourceLicensesViewState();
}

class _OpenSourceLicensesViewState extends State<OpenSourceLicensesView> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: CustomScrollView(
        slivers: [
          const SliverAppBar.medium(
            expandedHeight: 120,
            title: Text("Open Source Licenses", style: TextStyle(fontWeight: FontWeight.bold),)
          ),
          SliverList(
            delegate: SliverChildBuilderDelegate(
                (BuildContext context, int index) {
                  final currentLicense = LicenseUtil.getLicenses()[index];
                  return GestureDetector(
                    onTap: () async {
                      if (currentLicense.repository != null) {
                        if (await canLaunchUrl(Uri.parse(currentLicense.repository ?? ""))) {
                          launchUrl(Uri.parse(currentLicense.repository ?? ""), mode: LaunchMode.externalApplication);
                        }
                      }
                    },
                    child: Padding(
                      padding: const EdgeInsets.all(12),
                      child: Container(
                        decoration: BoxDecoration(
                          borderRadius: BorderRadius.circular(8),
                          color: Theme.of(context).brightness == Brightness.light ? Colors.grey[100] : Colors.grey[900],
                        ),
                        child: Padding(
                          padding: const EdgeInsets.only(left: 12, right: 12, top: 20, bottom: 20),
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(currentLicense.name, style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 18)),
                              Text("Version: ${currentLicense.version ?? "N/A"}", style: const TextStyle(color: Colors.grey)),
                              const SizedBox(height: 8),
                              const Divider(),
                              const SizedBox(height: 8),
                              Text(currentLicense.license, textAlign: TextAlign.justify, style: const TextStyle(color: Colors.grey)),
                            ],
                          ),
                        ),
                      ),
                    ),
                  );
                },
              childCount: LicenseUtil.getLicenses().length
            ),
          ),
          const SliverToBoxAdapter(
            child: Padding(
              padding: EdgeInsets.only(top: 8, bottom: 20),
              child: Text("Thank you to all maintainers of these repositories 💝", style: TextStyle(color: Colors.grey), textAlign: TextAlign.center,),
            )
          )
        ],
      ),
    );
  }
}