feat(core): Re-add xmlns for StanzaHandler

packages/moxxmpp/lib/src/managers/handlers.dart

@@ -1,5 +1,6 @@
 import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
@@ -55,6 +56,7 @@ class StanzaHandler extends Handler {
     this.tagName,
     this.priority = 0,
     this.stanzaTag,
+    this.xmlns,
   });
   
   /// If specified, then the stanza must contain a direct child with a tag equal to
@@ -69,6 +71,11 @@ class StanzaHandler extends Handler {
   /// If specified, the matching stanza must have a tag equal to [stanzaTag].
   final String? stanzaTag;
 
+  /// If specified, then the stanza must have a xmlns attribute equal to [xmlns].
+  /// This defaults to [stanzaXmlns], but can be set to any other value or null. This
+  /// is useful, for example, for components.
+  final String? xmlns;
+
   /// The priority after which [StanzaHandler]s are sorted.
   final int priority;
 
@@ -81,11 +88,9 @@ class StanzaHandler extends Handler {
     if (stanzaTag != null) {
       matches &= node.tag == stanzaTag;
     }
-    // if (xmlns != null) {
+    if (xmlns != null) {
-    //   matches &= node.xmlns == xmlns;
+      matches &= node.xmlns == xmlns;
-    //   if (flag != null)
+    }
-    //     print('${node.xmlns} == $xmlns');
-    // }
 
     if (tagName != null) {
       final firstTag = node.firstTag(tagName!, xmlns: tagXmlns);

packages/moxxmpp/test/stanzahandler_test.dart

@@ -122,23 +122,24 @@ void main() {
     expect(handler.matches(stanza2), false);
   });
 
-  // test('Test matching stanzas with a different xmlns', () {
+  test('Test matching stanzas with a different xmlns', () {
-  //   final handler = StanzaHandler(
+    final handler = StanzaHandler(
-  //     callback: (stanza, _) async => StanzaHandlerData(
+      callback: (stanza, _) async => StanzaHandlerData(
-  //       true,
+        true,
-  //       false,
+        false,
-  //       null,
+        null,
-  //       stanza,
+        stanza,
-  //     ),
+      ),
-  //   );
+      xmlns: componentAcceptXmlns,
+    );
 
-  //   expect(handler.matches(Stanza.iq(xmlns: stanzaXmlns)), false);
+    expect(handler.matches(Stanza.iq(xmlns: stanzaXmlns)), false);
-  //   expect(handler.matches(Stanza.message(xmlns: stanzaXmlns)), false);
+    expect(handler.matches(Stanza.message(xmlns: stanzaXmlns)), false);
-  //   expect(handler.matches(Stanza.presence(xmlns: stanzaXmlns)), false);
+    expect(handler.matches(Stanza.presence(xmlns: stanzaXmlns)), false);
-  //   expect(handler.matches(Stanza.iq(xmlns: componentAcceptXmlns)), true);
+    expect(handler.matches(Stanza.iq(xmlns: componentAcceptXmlns)), true);
-  //   expect(handler.matches(stanza1), false);
+    expect(handler.matches(stanza1), false);
-  //   expect(handler.matches(stanza2), false);
+    expect(handler.matches(stanza2), false);
-  // });
+  });
 
   test('sorting', () {
     final handlerList = [