fix: User pills

lib/pages/chat/events/html_message.dart

@@ -422,6 +422,11 @@ class RoomPillExtension extends HtmlExtension {
     return userId != null;
   }
 
+  static final _cachedUsers = <String, User?>{};
+
+  Future<User?> _fetchUser(String matrixId) async =>
+      _cachedUsers[room.id + matrixId] ??= await room.requestUser(matrixId);
+
   @override
   InlineSpan build(
     ExtensionContext context,
@@ -433,14 +438,18 @@ class RoomPillExtension extends HtmlExtension {
       return TextSpan(text: context.innerHtml);
     }
     if (matrixId.sigil == '@') {
-      final user = room.unsafeGetUserFromMemoryOrFallback(matrixId);
       return WidgetSpan(
-        child: MatrixPill(
-          key: Key('user_pill_$matrixId'),
-          name: user.calcDisplayname(),
-          avatar: user.avatarUrl,
-          uri: href,
-          outerContext: this.context,
+        child: FutureBuilder<User?>(
+          future: _fetchUser(matrixId),
+          builder: (context, snapshot) => MatrixPill(
+            key: Key('user_pill_$matrixId'),
+            name: _cachedUsers[room.id + matrixId]?.calcDisplayname() ??
+                matrixId.localpart ??
+                matrixId,
+            avatar: _cachedUsers[room.id + matrixId]?.avatarUrl,
+            uri: href,
+            outerContext: this.context,
+          ),
         ),
       );
     }

pubspec.lock

@@ -1059,10 +1059,10 @@ packages:
     dependency: "direct main"
     description:
       name: matrix
-      sha256: "2b07709bce975d2be4dc4cd3cc1196fcd6c0397d4e250b42a498e35523fc28f3"
+      sha256: a1c336a1f1d8f914cd8ec1adb4cab4f062e36ccabcc1a849389c85031a73f9d2
       url: "https://pub.dev"
     source: hosted
-    version: "0.20.1"
+    version: "0.20.4"
   matrix_api_lite:
     dependency: transitive
     description:

pubspec.yaml

@@ -62,7 +62,7 @@ dependencies:
   keyboard_shortcuts: ^0.1.4
   latlong2: ^0.8.1
   linkify: ^5.0.0
-  matrix: ^0.20.1
+  matrix: ^0.20.4
   matrix_homeserver_recommendations: ^0.3.0
   native_imaging: ^0.1.0
   package_info_plus: ^4.0.0