init: rough companion app stub

2026-05-07 18:35:58 +02:00
commit 5f017ac05d
73 changed files with 3520 additions and 0 deletions
@@ -0,0 +1,41 @@
+import 'dart:async';
+
+import 'package:multicast_dns/multicast_dns.dart';
+
+import '../../../domain/models/server_config.dart';
+
+class MdnsDiscovery {
+  static const String serviceType = '_localiserd._tcp';
+
+  MDnsClient? _client;
+
+  Stream<ServerConfig> discover() async* {
+    _client?.stop();
+    final client = MDnsClient();
+    _client = client;
+    await client.start();
+    try {
+      await for (final ptr in client.lookup<PtrResourceRecord>(
+        ResourceRecordQuery.serverPointer(serviceType),
+      )) {
+        await for (final srv in client.lookup<SrvResourceRecord>(
+          ResourceRecordQuery.service(ptr.domainName),
+        )) {
+          await for (final ip in client.lookup<IPAddressResourceRecord>(
+            ResourceRecordQuery.addressIPv4(srv.target),
+          )) {
+            yield ServerConfig(host: ip.address.address, port: srv.port);
+          }
+        }
+      }
+    } finally {
+      client.stop();
+      if (_client == client) _client = null;
+    }
+  }
+
+  Future<void> stop() async {
+    _client?.stop();
+    _client = null;
+  }
+}