feat: Integrate the BaseRosterStateManager with the RosterManager

packages/moxxmpp/lib/src/events.dart

@@ -1,6 +1,7 @@
 import 'package:moxxmpp/src/connection.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/roster/roster.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0060/xep_0060.dart';
@@ -53,6 +54,14 @@ class StreamResumedEvent extends XmppEvent {
 /// Triggered when stream resumption failed
 class StreamResumeFailedEvent extends XmppEvent {}
 
+/// Triggered when a roster push is received
+class RosterPushEvent extends XmppEvent {
+  RosterPushEvent({ required this.item, this.ver });
+  final XmppRosterItem item;
+  final String? ver;
+}
+
+/// Triggered when a message is received
 class MessageEvent extends XmppEvent {
   MessageEvent({
     required this.body,

packages/moxxmpp/lib/src/roster/roster.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -8,6 +9,7 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/roster/errors.dart';
+import 'package:moxxmpp/src/roster/state.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/types/result.dart';
@@ -33,12 +35,6 @@ class RosterRequestResult {
   String? ver;
 }
 
-class RosterPushEvent extends XmppEvent {
-  RosterPushEvent({ required this.item, this.ver });
-  final XmppRosterItem item;
-  final String? ver;
-}
-
 /// A Stub feature negotiator for finding out whether roster versioning is supported.
 class RosterFeatureNegotiator extends XmppFeatureNegotiatorBase {
   RosterFeatureNegotiator() : _supported = false, super(11, false, rosterVersioningXmlns, rosterNegotiator);
@@ -65,8 +61,8 @@ class RosterFeatureNegotiator extends XmppFeatureNegotiatorBase {
 
 /// This manager requires a RosterFeatureNegotiator to be registered.
 class RosterManager extends XmppManagerBase {
-  RosterManager() : _rosterVersion = null, super();
+  RosterManager(this._stateManager) : super();
-  String? _rosterVersion;
+  final BaseRosterStateManager _stateManager;
   
   @override
   String getId() => rosterManager;
@@ -87,18 +83,6 @@ class RosterManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true; 
 
-  /// Commit the current roster to storage.
-  Future<void> commitLastRosterVersion(String version) async {}
-
-  /// Load the last roster data
-  Future<void> loadLastRosterVersion() async {}
-
-  void setRosterVersion(String ver) {
-    assert(_rosterVersion == null, 'A roster version must not be empty');
-
-    _rosterVersion = ver;
-  }
- 
   Future<StanzaHandlerData> _onRosterPush(Stanza stanza, StanzaHandlerData state) async {
     final attrs = getAttributes();
     final from = stanza.attributes['from'] as String?;
@@ -122,13 +106,9 @@ class RosterManager extends XmppManagerBase {
       return state.copyWith(done: true);
     }
 
-    if (query.attributes['ver'] != null) {
+    unawaited(
-      final ver = query.attributes['ver']! as String;
+      _stateManager.handleRosterPush(
-      await commitLastRosterVersion(ver);
+        RosterPushEvent(
-      _rosterVersion = ver;
-    }
-    
-    attrs.sendEvent(RosterPushEvent(
           item: XmppRosterItem(
             jid: item.attributes['jid']! as String,
             subscription: item.attributes['subscription']! as String,
@@ -136,7 +116,10 @@ class RosterManager extends XmppManagerBase {
             name: item.attributes['name'] as String?, 
           ),
           ver: query.attributes['ver'] as String?,
-    ),);
+        ),
+      ),
+    );
+    
     await attrs.sendStanza(stanza.reply());
 
     return state.copyWith(done: true);
@@ -146,38 +129,34 @@ class RosterManager extends XmppManagerBase {
   /// the server deems a regular roster response more efficient than n roster pushes.
   Future<Result<RosterRequestResult, RosterError>> _handleRosterResponse(XMLNode? query) async {
     final List<XmppRosterItem> items;
+    String? rosterVersion;
     if (query != null) {
-      items = query.children.map((item) => XmppRosterItem(
+      items = query.children.map(
+        (item) => XmppRosterItem(
           name: item.attributes['name'] as String?,
           jid: item.attributes['jid']! as String,
           subscription: item.attributes['subscription']! as String,
           ask: item.attributes['ask'] as String?,
           groups: item.findTags('group').map((groupNode) => groupNode.innerText()).toList(),
-      ),).toList();
+        ),
+      ).toList();
 
-      if (query.attributes['ver'] != null) {
+      rosterVersion = query.attributes['ver'] as String?;
-        final ver_ = query.attributes['ver']! as String;
-        await commitLastRosterVersion(ver_);
-        _rosterVersion = ver_;
-      }
     } else {
       logger.warning('Server response to roster request without roster versioning does not contain a <query /> element, while the type is not error. This violates RFC6121');
       return Result(NoQueryError());
     }
 
-    final ver = query.attributes['ver'] as String?;
+    final result = RosterRequestResult(
-    if (ver != null) {
-      _rosterVersion = ver;
-      await commitLastRosterVersion(ver);
-    }
-    
-    return Result(
-      RosterRequestResult(
       items: items,
-        ver: ver,
+      ver: rosterVersion,
-      ),
     );
 
+    unawaited(
+      _stateManager.handleRosterFetch(result),
+    );
+
+    return Result(result);
   }
   
   /// Requests the roster following RFC 6121 without using roster versioning.
@@ -207,10 +186,6 @@ class RosterManager extends XmppManagerBase {
   /// Requests a series of roster pushes according to RFC6121. Requires that the server
   /// advertises urn:xmpp:features:rosterver in the stream features.
   Future<Result<RosterRequestResult?, RosterError>> requestRosterPushes() async {
-    if (_rosterVersion == null) {
-      await loadLastRosterVersion();
-    }
-
     final attrs = getAttributes();
     final result = await attrs.sendStanza(
       Stanza.iq(
@@ -220,7 +195,7 @@ class RosterManager extends XmppManagerBase {
             tag: 'query',
             xmlns: rosterXmlns,
             attributes: {
-              'ver': _rosterVersion ?? ''
+              'ver': await _stateManager.getRosterVersion() ?? '',
             },
           )
         ],

packages/moxxmpp/lib/src/roster/state.dart

@@ -1,4 +1,5 @@
 import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/roster/roster.dart';
 
 class _RosterProcessTriple {
@@ -22,6 +23,12 @@ abstract class BaseRosterStateManager {
 
   Future<void> commitRoster(String? version, List<String> removed, List<XmppRosterItem> modified, List<XmppRosterItem> added);
 
+  Future<String?> getRosterVersion() async {
+    await _loadRosterCache();
+
+    return currentVersion;
+  }
+  
   Future<void> _loadRosterCache() async {
     if (currentRoster == null) {
       final result = await loadRosterCache();