feat(xep): Add example for XEP 0045 Moxxmpp.

Signed-off-by: Ikjot Singh Dhody <ikjotsd@gmail.com>

examples_dart/bin/muc_client.dart

@@ -0,0 +1,87 @@
+import 'package:cli_repl/cli_repl.dart';
+import 'package:example_dart/arguments.dart';
+import 'package:example_dart/socket.dart';
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+
+void main(List<String> args) async {
+  // Set up logging
+  Logger.root.level = Level.ALL;
+  Logger.root.onRecord.listen((record) {
+    // ignore: avoid_print
+    print(
+      '[${record.level.name}] (${record.loggerName}) ${record.time}: ${record.message}',
+    );
+  });
+
+  final parser = ArgumentParser()
+    ..parser.addOption('to', help: 'The JID to send messages to')
+    ..parser.addOption('nick', help: 'The nickname with which to join the MUC');
+  final options = parser.handleArguments(args);
+  if (options == null) {
+    return;
+  }
+
+  // Connect
+  final jid = parser.jid;
+  final to = JID.fromString(options['to']! as String).toBare();
+  final nick = options['nick']! as String;
+  print(parser.connectionSettings);
+  final connection = XmppConnection(
+    TestingReconnectionPolicy(),
+    AlwaysConnectedConnectivityManager(),
+    ClientToServerNegotiator(),
+    ExampleTCPSocketWrapper(parser.srvRecord),
+  )..connectionSettings = parser.connectionSettings;
+
+  print(parser.connectionSettings.host);
+  print(parser.connectionSettings.jid);
+  print(parser.connectionSettings.password);
+  print(parser.connectionSettings.port);
+
+  // Register the managers and negotiators
+  await connection.registerManagers([
+    PresenceManager(),
+    DiscoManager([]),
+    PubSubManager(),
+    MessageManager(),
+    MUCManager(),
+  ]);
+  await connection.registerFeatureNegotiators([
+    SaslPlainNegotiator(),
+    ResourceBindingNegotiator(),
+    StartTlsNegotiator(),
+    SaslScramNegotiator(10, '', '', ScramHashType.sha1),
+  ]);
+
+  // Connect
+  Logger.root.info('Connecting...');
+  final result =
+      await connection.connect(shouldReconnect: false, waitUntilLogin: true);
+  if (!result.isType<bool>()) {
+    Logger.root.severe('Authentication failed!');
+    return;
+  }
+  Logger.root.info('Connected.');
+
+  // Join room
+  await connection.getManagerById<MUCManager>(mucManager)!.joinRoom(to, nick);
+
+  final repl = Repl(prompt: '> ');
+  await for (final line in repl.runAsync()) {
+    await connection
+        .getManagerById<MessageManager>(messageManager)!
+        .sendMessage(
+            to,
+            TypedMap<StanzaHandlerExtension>.fromList([
+              MessageBodyData(line),
+            ]),
+            type: 'groupchat');
+  }
+
+  // Leave room
+  await connection.getManagerById<MUCManager>(mucManager)!.leaveRoom(to);
+
+  // Disconnect
+  await connection.disconnect();
+}