chore(release): publish packages

- moxxmpp@0.1.6
 - moxxmpp_socket_tcp@0.1.2+8

example/pubspec.yaml

@@ -16,10 +16,10 @@ dependencies:
     version: 0.1.4+1
   moxxmpp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: 0.1.3
+    version: 0.1.6
   moxxmpp_socket_tcp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: 0.1.2+4
+    version: 0.1.2+8
 
 dev_dependencies:
   flutter_test:

packages/moxxmpp/CHANGELOG.md

@@ -1,3 +1,20 @@
+## 0.1.6
+
+ - **FEAT**: Implement XEP-0308.
+
+## 0.1.5
+
+ - **FEAT**: Message events now contain the stanza error, if available.
+
+## 0.1.4
+
+ - **FIX**: Only stanza-id required 'sid:0' support.
+ - **FEAT**: Implement parsing and sending of retractions.
+
+## 0.1.3+1
+
+ - **FIX**: Expose the error classes.
+
 ## 0.1.3
 
  - **REFACTOR**: Replace MayFail by Result.

packages/moxxmpp/lib/moxxmpp.dart

@@ -1,6 +1,7 @@
 library moxxmpp;
 
 export 'package:moxxmpp/src/connection.dart';
+export 'package:moxxmpp/src/errors.dart';
 export 'package:moxxmpp/src/events.dart';
 export 'package:moxxmpp/src/iq.dart';
 export 'package:moxxmpp/src/jid.dart';
@@ -16,6 +17,7 @@ export 'package:moxxmpp/src/negotiators/manager.dart';
 export 'package:moxxmpp/src/negotiators/namespaces.dart';
 export 'package:moxxmpp/src/negotiators/negotiator.dart';
 export 'package:moxxmpp/src/negotiators/resource_binding.dart';
+export 'package:moxxmpp/src/negotiators/sasl/errors.dart';
 export 'package:moxxmpp/src/negotiators/sasl/negotiator.dart';
 export 'package:moxxmpp/src/negotiators/sasl/plain.dart';
 export 'package:moxxmpp/src/negotiators/sasl/scram.dart';
@@ -71,6 +73,7 @@ export 'package:moxxmpp/src/xeps/xep_0384/types.dart';
 export 'package:moxxmpp/src/xeps/xep_0384/xep_0384.dart';
 export 'package:moxxmpp/src/xeps/xep_0385.dart';
 export 'package:moxxmpp/src/xeps/xep_0414.dart';
+export 'package:moxxmpp/src/xeps/xep_0424.dart';
 export 'package:moxxmpp/src/xeps/xep_0446.dart';
 export 'package:moxxmpp/src/xeps/xep_0447.dart';
 export 'package:moxxmpp/src/xeps/xep_0448.dart';

packages/moxxmpp/lib/src/events.dart

@@ -8,6 +8,7 @@ import 'package:moxxmpp/src/xeps/xep_0066.dart';
 import 'package:moxxmpp/src/xeps/xep_0085.dart';
 import 'package:moxxmpp/src/xeps/xep_0359.dart';
 import 'package:moxxmpp/src/xeps/xep_0385.dart';
+import 'package:moxxmpp/src/xeps/xep_0424.dart';
 import 'package:moxxmpp/src/xeps/xep_0446.dart';
 import 'package:moxxmpp/src/xeps/xep_0447.dart';
 import 'package:moxxmpp/src/xeps/xep_0461.dart';
@@ -62,6 +63,7 @@ class MessageEvent extends XmppEvent {
     required this.isMarkable,
     required this.encrypted,
     required this.other,
+    this.error,
     this.type,
     this.oob,
     this.sfs,
@@ -71,7 +73,10 @@ class MessageEvent extends XmppEvent {
     this.fun,
     this.funReplacement,
     this.funCancellation,
+    this.messageRetraction,
+    this.messageCorrectionId,
   });
+  final StanzaError? error;
   final String body;
   final JID fromJid;
   final JID toJid;
@@ -90,6 +95,8 @@ class MessageEvent extends XmppEvent {
   final String? funReplacement;
   final String? funCancellation;
   final bool encrypted;
+  final MessageRetractionData? messageRetraction;
+  final String? messageCorrectionId;
   final Map<String, dynamic> other;
 }
 

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

@@ -6,6 +6,7 @@ import 'package:moxxmpp/src/xeps/xep_0203.dart';
 import 'package:moxxmpp/src/xeps/xep_0359.dart';
 import 'package:moxxmpp/src/xeps/xep_0380.dart';
 import 'package:moxxmpp/src/xeps/xep_0385.dart';
+import 'package:moxxmpp/src/xeps/xep_0424.dart';
 import 'package:moxxmpp/src/xeps/xep_0446.dart';
 import 'package:moxxmpp/src/xeps/xep_0447.dart';
 import 'package:moxxmpp/src/xeps/xep_0461.dart';
@@ -55,6 +56,11 @@ class StanzaHandlerData with _$StanzaHandlerData {
       // This is for stanza handlers that are not part of the XMPP library but still need
       // pass data around.
       @Default(<String, dynamic>{}) Map<String, dynamic> other,
+      // If non-null, then it indicates the origin Id of the message that should be
+      // retracted
+      MessageRetractionData? messageRetraction,
+      // If non-null, then the message is a correction for the specified stanza Id
+      String? lastMessageCorrectionSid,
     }
   ) = _StanzaHandlerData;
 }

packages/moxxmpp/lib/src/managers/data.freezed.dart

@@ -54,7 +54,12 @@ mixin _$StanzaHandlerData {
   DelayedDelivery? get delayedDelivery =>
       throw _privateConstructorUsedError; // This is for stanza handlers that are not part of the XMPP library but still need
 // pass data around.
-  Map<String, dynamic> get other => throw _privateConstructorUsedError;
+  Map<String, dynamic> get other =>
+      throw _privateConstructorUsedError; // If non-null, then it indicates the origin Id of the message that should be
+// retracted
+  MessageRetractionData? get messageRetraction =>
+      throw _privateConstructorUsedError; // If non-null, then the message is a correction for the specified stanza Id
+  String? get lastMessageCorrectionSid => throw _privateConstructorUsedError;
 
   @JsonKey(ignore: true)
   $StanzaHandlerDataCopyWith<StanzaHandlerData> get copyWith =>
@@ -87,7 +92,9 @@ abstract class $StanzaHandlerDataCopyWith<$Res> {
       bool encrypted,
       ExplicitEncryptionType? encryptionType,
       DelayedDelivery? delayedDelivery,
-      Map<String, dynamic> other});
+      Map<String, dynamic> other,
+      MessageRetractionData? messageRetraction,
+      String? lastMessageCorrectionSid});
 }
 
 /// @nodoc
@@ -122,6 +129,8 @@ class _$StanzaHandlerDataCopyWithImpl<$Res>
     Object? encryptionType = freezed,
     Object? delayedDelivery = freezed,
     Object? other = freezed,
+    Object? messageRetraction = freezed,
+    Object? lastMessageCorrectionSid = freezed,
   }) {
     return _then(_value.copyWith(
       done: done == freezed
@@ -208,6 +217,14 @@ class _$StanzaHandlerDataCopyWithImpl<$Res>
           ? _value.other
           : other // ignore: cast_nullable_to_non_nullable
               as Map<String, dynamic>,
+      messageRetraction: messageRetraction == freezed
+          ? _value.messageRetraction
+          : messageRetraction // ignore: cast_nullable_to_non_nullable
+              as MessageRetractionData?,
+      lastMessageCorrectionSid: lastMessageCorrectionSid == freezed
+          ? _value.lastMessageCorrectionSid
+          : lastMessageCorrectionSid // ignore: cast_nullable_to_non_nullable
+              as String?,
     ));
   }
 }
@@ -240,7 +257,9 @@ abstract class _$$_StanzaHandlerDataCopyWith<$Res>
       bool encrypted,
       ExplicitEncryptionType? encryptionType,
       DelayedDelivery? delayedDelivery,
-      Map<String, dynamic> other});
+      Map<String, dynamic> other,
+      MessageRetractionData? messageRetraction,
+      String? lastMessageCorrectionSid});
 }
 
 /// @nodoc
@@ -277,6 +296,8 @@ class __$$_StanzaHandlerDataCopyWithImpl<$Res>
     Object? encryptionType = freezed,
     Object? delayedDelivery = freezed,
     Object? other = freezed,
+    Object? messageRetraction = freezed,
+    Object? lastMessageCorrectionSid = freezed,
   }) {
     return _then(_$_StanzaHandlerData(
       done == freezed
@@ -363,6 +384,14 @@ class __$$_StanzaHandlerDataCopyWithImpl<$Res>
           ? _value._other
           : other // ignore: cast_nullable_to_non_nullable
               as Map<String, dynamic>,
+      messageRetraction: messageRetraction == freezed
+          ? _value.messageRetraction
+          : messageRetraction // ignore: cast_nullable_to_non_nullable
+              as MessageRetractionData?,
+      lastMessageCorrectionSid: lastMessageCorrectionSid == freezed
+          ? _value.lastMessageCorrectionSid
+          : lastMessageCorrectionSid // ignore: cast_nullable_to_non_nullable
+              as String?,
     ));
   }
 }
@@ -387,7 +416,9 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
       this.encrypted = false,
       this.encryptionType,
       this.delayedDelivery,
-      final Map<String, dynamic> other = const <String, dynamic>{}})
+      final Map<String, dynamic> other = const <String, dynamic>{},
+      this.messageRetraction,
+      this.lastMessageCorrectionSid})
       : _other = other;
 
 // Indicates to the runner that processing is now done. This means that all
@@ -463,9 +494,17 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
     return EqualUnmodifiableMapView(_other);
   }
 
+// If non-null, then it indicates the origin Id of the message that should be
+// retracted
+  @override
+  final MessageRetractionData? messageRetraction;
+// If non-null, then the message is a correction for the specified stanza Id
+  @override
+  final String? lastMessageCorrectionSid;
+
   @override
   String toString() {
-    return 'StanzaHandlerData(done: $done, cancel: $cancel, cancelReason: $cancelReason, stanza: $stanza, retransmitted: $retransmitted, sims: $sims, sfs: $sfs, oob: $oob, stableId: $stableId, reply: $reply, chatState: $chatState, isCarbon: $isCarbon, deliveryReceiptRequested: $deliveryReceiptRequested, isMarkable: $isMarkable, fun: $fun, funReplacement: $funReplacement, funCancellation: $funCancellation, encrypted: $encrypted, encryptionType: $encryptionType, delayedDelivery: $delayedDelivery, other: $other)';
+    return 'StanzaHandlerData(done: $done, cancel: $cancel, cancelReason: $cancelReason, stanza: $stanza, retransmitted: $retransmitted, sims: $sims, sfs: $sfs, oob: $oob, stableId: $stableId, reply: $reply, chatState: $chatState, isCarbon: $isCarbon, deliveryReceiptRequested: $deliveryReceiptRequested, isMarkable: $isMarkable, fun: $fun, funReplacement: $funReplacement, funCancellation: $funCancellation, encrypted: $encrypted, encryptionType: $encryptionType, delayedDelivery: $delayedDelivery, other: $other, messageRetraction: $messageRetraction, lastMessageCorrectionSid: $lastMessageCorrectionSid)';
   }
 
   @override
@@ -501,7 +540,11 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
                 .equals(other.encryptionType, encryptionType) &&
             const DeepCollectionEquality()
                 .equals(other.delayedDelivery, delayedDelivery) &&
-            const DeepCollectionEquality().equals(other._other, this._other));
+            const DeepCollectionEquality().equals(other._other, this._other) &&
+            const DeepCollectionEquality()
+                .equals(other.messageRetraction, messageRetraction) &&
+            const DeepCollectionEquality().equals(
+                other.lastMessageCorrectionSid, lastMessageCorrectionSid));
   }
 
   @override
@@ -527,7 +570,9 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
         const DeepCollectionEquality().hash(encrypted),
         const DeepCollectionEquality().hash(encryptionType),
         const DeepCollectionEquality().hash(delayedDelivery),
-        const DeepCollectionEquality().hash(_other)
+        const DeepCollectionEquality().hash(_other),
+        const DeepCollectionEquality().hash(messageRetraction),
+        const DeepCollectionEquality().hash(lastMessageCorrectionSid)
       ]);
 
   @JsonKey(ignore: true)
@@ -556,7 +601,9 @@ abstract class _StanzaHandlerData implements StanzaHandlerData {
       final bool encrypted,
       final ExplicitEncryptionType? encryptionType,
       final DelayedDelivery? delayedDelivery,
-      final Map<String, dynamic> other}) = _$_StanzaHandlerData;
+      final Map<String, dynamic> other,
+      final MessageRetractionData? messageRetraction,
+      final String? lastMessageCorrectionSid}) = _$_StanzaHandlerData;
 
   @override // Indicates to the runner that processing is now done. This means that all
 // pre-processing is done and no other handlers should be consulted.
@@ -606,6 +653,11 @@ abstract class _StanzaHandlerData implements StanzaHandlerData {
   @override // This is for stanza handlers that are not part of the XMPP library but still need
 // pass data around.
   Map<String, dynamic> get other;
+  @override // If non-null, then it indicates the origin Id of the message that should be
+// retracted
+  MessageRetractionData? get messageRetraction;
+  @override // If non-null, then the message is a correction for the specified stanza Id
+  String? get lastMessageCorrectionSid;
   @override
   @JsonKey(ignore: true)
   _$$_StanzaHandlerDataCopyWith<_$_StanzaHandlerData> get copyWith =>

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

@@ -24,3 +24,5 @@ const omemoManager = 'org.moxxmpp.omemomanager';
 const emeManager = 'org.moxxmpp.ememanager';
 const cryptographicHashManager = 'org.moxxmpp.cryptographichashmanager';
 const delayedDeliveryManager = 'org.moxxmpp.delayeddeliverymanager';
+const messageRetractionManager = 'org.moxxmpp.messageretractionmanager';
+const lastMessageCorrectionManager = 'org.moxxmpp.lastmessagecorrectionmanager';

packages/moxxmpp/lib/src/message.dart

@@ -11,14 +11,15 @@ import 'package:moxxmpp/src/xeps/staging/file_upload_notification.dart';
 import 'package:moxxmpp/src/xeps/xep_0066.dart';
 import 'package:moxxmpp/src/xeps/xep_0085.dart';
 import 'package:moxxmpp/src/xeps/xep_0184.dart';
+import 'package:moxxmpp/src/xeps/xep_0308.dart';
 import 'package:moxxmpp/src/xeps/xep_0333.dart';
 import 'package:moxxmpp/src/xeps/xep_0359.dart';
+import 'package:moxxmpp/src/xeps/xep_0424.dart';
 import 'package:moxxmpp/src/xeps/xep_0446.dart';
 import 'package:moxxmpp/src/xeps/xep_0447.dart';
 import 'package:moxxmpp/src/xeps/xep_0448.dart';
 
 class MessageDetails {
-
   const MessageDetails({
     required this.to,
     this.body,
@@ -35,6 +36,8 @@ class MessageDetails {
     this.funReplacement,
     this.funCancellation,
     this.shouldEncrypt = false,
+    this.messageRetraction,
+    this.lastMessageCorrectionId,
   });
   final String to;
   final String? body;
@@ -51,6 +54,8 @@ class MessageDetails {
   final String? funReplacement;
   final String? funCancellation;
   final bool shouldEncrypt;
+  final MessageRetractionData? messageRetraction;
+  final String? lastMessageCorrectionId;
 }
 
 class MessageManager extends XmppManagerBase {
@@ -95,7 +100,10 @@ class MessageManager extends XmppManagerBase {
       funReplacement: state.funReplacement,
       funCancellation: state.funCancellation,
       encrypted: state.encrypted,
+      messageRetraction: state.messageRetraction,
+      messageCorrectionId: state.lastMessageCorrectionSid,
       other: state.other,
+      error: StanzaError.fromStanza(message),
     ),);
 
     return state.copyWith(done: true);
@@ -159,6 +167,8 @@ class MessageManager extends XmppManagerBase {
         } else if (firstSource is StatelessFileSharingEncryptedSource) {
           body = firstSource.source.url;
         }
+      } else if (details.messageRetraction?.fallback != null) {
+        body = details.messageRetraction!.fallback;
       }
 
       stanza.addChild(
@@ -216,6 +226,41 @@ class MessageManager extends XmppManagerBase {
         ),
       );
     }
+
+    if (details.messageRetraction != null) {
+      stanza.addChild(
+        XMLNode.xmlns(
+          tag: 'apply-to',
+          xmlns: fasteningXmlns,
+          attributes: <String, String>{
+            'id': details.messageRetraction!.id,
+          },
+          children: [
+            XMLNode.xmlns(
+              tag: 'retract',
+              xmlns: messageRetractionXmlns,
+            ),
+          ],
+        ),
+      );
+
+      if (details.messageRetraction!.fallback != null) {
+        stanza.addChild(
+          XMLNode.xmlns(
+            tag: 'fallback',
+            xmlns: fallbackIndicationXmlns,
+          ),
+        );
+      }
+    }
+
+    if (details.lastMessageCorrectionId != null) {
+      stanza.addChild(
+        makeLastMessageCorrectionEdit(
+          details.lastMessageCorrectionId!,
+        ),
+      );
+    }
     
     getAttributes().sendStanza(stanza, awaitable: false);
   }

packages/moxxmpp/lib/src/namespaces.dart

@@ -76,6 +76,9 @@ const hashSha3512 = 'sha3-512';
 const hashBlake2b256 = 'blake2b-256';
 const hashBlake2b512 = 'blake2b-512';
 
+// XEP-0308
+const lmcXmlns = 'urn:xmpp:message-correct:0';
+
 // XEP-0333
 const chatMarkersXmlns = 'urn:xmpp:chat-markers:0';
 
@@ -114,6 +117,15 @@ const simsXmlns = 'urn:xmpp:sims:1';
 // XEP-0420
 const sceXmlns = 'urn:xmpp:sce:1';
 
+// XEP-0422
+const fasteningXmlns = 'urn:xmpp:fasten:0';
+
+// XEP-0424
+const messageRetractionXmlns = 'urn:xmpp:message-retract:0';
+
+// XEp-0428
+const fallbackIndicationXmlns = 'urn:xmpp:fallback:0';
+
 // XEP-0446
 const fileMetadataXmlns = 'urn:xmpp:file:metadata:0';
 

packages/moxxmpp/lib/src/stanza.dart

@@ -1,6 +1,28 @@
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
+/// A simple description of the <error /> element that may be inside a stanza
+class StanzaError {
+  StanzaError(this.type, this.error);
+  String type;
+  String error;
+
+  /// Returns a StanzaError if [stanza] contains a <error /> element. If not, returns
+  /// null.
+  static StanzaError? fromStanza(Stanza stanza) {
+    final error = stanza.firstTag('error');
+    if (error == null) return null;
+
+    final stanzaError = error.firstTagByXmlns(fullStanzaXmlns);
+    if (stanzaError == null) return null;
+
+    return StanzaError(
+      error.attributes['type']! as String,
+      stanzaError.tag,
+    );
+  }
+}
+
 class Stanza extends XMLNode {
   // ignore: use_super_parameters
   Stanza({ this.to, this.from, this.type, this.id, List<XMLNode> children = const [], required String tag, Map<String, String> attributes = const {} }) : super(

packages/moxxmpp/lib/src/xeps/xep_0308.dart

@@ -0,0 +1,52 @@
+import 'package:moxxmpp/src/managers/base.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/managers/handlers.dart';
+import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/stringxml.dart';
+
+XMLNode makeLastMessageCorrectionEdit(String id) {
+  return XMLNode.xmlns(
+    tag: 'replace',
+    xmlns: lmcXmlns,
+    attributes: <String, String>{
+      'id': id,
+    },
+  );
+}
+
+class LastMessageCorrectionManager extends XmppManagerBase {
+  @override
+  String getName() => 'LastMessageCorrectionManager';
+
+  @override
+  String getId() => lastMessageCorrectionManager;
+
+  @override
+  List<String> getDiscoFeatures() => [ lmcXmlns ];
+  
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+    StanzaHandler(
+      stanzaTag: 'message',
+      tagName: 'reply',
+      tagXmlns: replyXmlns,
+      callback: _onMessage,
+      // Before the message handler
+      priority: -99,
+    )
+  ];
+
+  @override
+  Future<bool> isSupported() async => true;
+  
+  Future<StanzaHandlerData> _onMessage(Stanza stanza, StanzaHandlerData state) async {
+    final edit = stanza.firstTag('replace', xmlns: lmcXmlns);
+    if (edit == null) return state;
+
+    return state.copyWith(
+      lastMessageCorrectionSid: edit.attributes['id']! as String,
+    );
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0359.dart

@@ -58,8 +58,16 @@ class StableIdManager extends XmppManagerBase {
     String? stanzaIdBy;
     final originIdTag = message.firstTag('origin-id', xmlns: stableIdXmlns);
     final stanzaIdTag = message.firstTag('stanza-id', xmlns: stableIdXmlns);
-    if (originIdTag != null || stanzaIdTag != null) {
-      logger.finest('Found Unique and Stable Stanza Id tag');
+
+    // Process the origin id
+    if (originIdTag != null) {
+      logger.finest('Found origin Id tag');
+      originId = originIdTag.attributes['id']! as String;
+    }
+
+    // Process the stanza id tag
+    if (stanzaIdTag != null) {
+      logger.finest('Found stanza Id tag');
       final attrs = getAttributes();
       final disco = attrs.getManagerById<DiscoManager>(discoManager)!;
       final result = await disco.discoInfoQuery(from.toString());
@@ -68,17 +76,10 @@ class StableIdManager extends XmppManagerBase {
         logger.finest('Got info for ${from.toString()}');
         if (info.features.contains(stableIdXmlns)) {
           logger.finest('${from.toString()} supports $stableIdXmlns.');
-
-          if (originIdTag != null) {
-            originId = originIdTag.attributes['id']! as String;
-          }
-
-          if (stanzaIdTag != null) {
-            stanzaId = stanzaIdTag.attributes['id']! as String;
-            stanzaIdBy = stanzaIdTag.attributes['by']! as String;
-          }
+          stanzaId = stanzaIdTag.attributes['id']! as String;
+          stanzaIdBy = stanzaIdTag.attributes['by']! as String;
         } else {
-          logger.finest('${from.toString()} does not support $stableIdXmlns. Ignoring... ');
+          logger.finest('${from.toString()} does not support $stableIdXmlns. Ignoring stanza id... ');
         }
       } else {
         logger.finest('Failed to find out if ${from.toString()} supports $stableIdXmlns. Ignoring... ');

packages/moxxmpp/lib/src/xeps/xep_0424.dart

@@ -0,0 +1,59 @@
+import 'package:moxxmpp/src/managers/base.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/managers/handlers.dart';
+import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/stanza.dart';
+
+class MessageRetractionData {
+  MessageRetractionData(this.id, this.fallback);
+  final String? fallback;
+  final String id;
+}
+
+class MessageRetractionManager extends XmppManagerBase {
+  @override
+  String getName() => 'MessageRetractionManager';
+
+  @override
+  String getId() => messageRetractionManager;
+
+  @override
+  List<String> getDiscoFeatures() => [ messageRetractionXmlns ];
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+    StanzaHandler(
+      stanzaTag: 'message',
+      callback: _onMessage,
+      // Before the MessageManager
+      priority: -99,
+    )
+  ];
+
+  @override
+  Future<bool> isSupported() async => true;
+  
+  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+    final applyTo = message.firstTag('apply-to', xmlns: fasteningXmlns);
+    if (applyTo == null) {
+      return state;
+    }
+
+    final retract = applyTo.firstTag('retract', xmlns: messageRetractionXmlns);
+    if (retract == null) {
+      return state;
+    }
+
+    final isFallbackBody = message.firstTag('fallback', xmlns: fallbackIndicationXmlns) != null;
+
+    return state.copyWith(
+      messageRetraction: MessageRetractionData(
+        applyTo.attributes['id']! as String,
+        isFallbackBody ?
+          message.firstTag('body')?.innerText() :
+          null,
+      ),
+    );
+  }
+}

packages/moxxmpp/pubspec.yaml

@@ -1,6 +1,6 @@
 name: moxxmpp
 description: A pure-Dart XMPP library
-version: 0.1.3
+version: 0.1.6
 homepage: https://codeberg.org/moxxy/moxxmpp
 publish_to: https://git.polynom.me/api/packages/Moxxy/pub
 
@@ -31,6 +31,6 @@ dev_dependencies:
   build_runner: ^2.1.11
   moxxmpp_socket_tcp:
    hosted: https://git.polynom.me/api/packages/Moxxy/pub
-   version: ^0.1.2+4
+   version: ^0.1.2+8
   test: ^1.16.0
   very_good_analysis: ^3.0.1

packages/moxxmpp_socket_tcp/CHANGELOG.md

@@ -1,3 +1,19 @@
+## 0.1.2+8
+
+ - Update a dependency to the latest release.
+
+## 0.1.2+7
+
+ - Update a dependency to the latest release.
+
+## 0.1.2+6
+
+ - Update a dependency to the latest release.
+
+## 0.1.2+5
+
+ - Update a dependency to the latest release.
+
 ## 0.1.2+4
 
  - Update a dependency to the latest release.

packages/moxxmpp_socket_tcp/pubspec.yaml

@@ -1,6 +1,6 @@
 name: moxxmpp_socket_tcp
 description: A socket for moxxmpp using TCP that implements the RFC6120 connection algorithm and XEP-0368
-version: 0.1.2+4
+version: 0.1.2+8
 homepage: https://codeberg.org/moxxy/moxxmpp
 publish_to: https://git.polynom.me/api/packages/Moxxy/pub
 
@@ -12,7 +12,7 @@ dependencies:
   meta: ^1.6.0
   moxxmpp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: ^0.1.3
+    version: ^0.1.6
 
 dev_dependencies:
   lints: ^2.0.0