add and render HistoryVisibilityContent

lib/models/content/content.dart

@@ -14,6 +14,7 @@ import "package:nexus/models/content/encrypted.dart";
 import "package:nexus/models/content/redaction.dart";
 import "package:nexus/models/content/server_acl.dart";
 import "package:nexus/models/content/topic.dart";
+import "package:nexus/models/content/history_visibility.dart";
 
 class Content {
   final Error? parseError;
@@ -44,6 +45,10 @@ enum EventType {
   encryption("m.room.encryption", EncryptionContent.fromJson),
   membership("m.room.member", MembershipContent.fromJson),
   create("m.room.create", CreateContent.fromJson),
+  historyVisibility(
+    "m.room.history_visibility",
+    HistoryVisibilityContent.fromJson,
+  ),
   canonicalAlias("m.room.canonical_alias", CanonicalAliasContent.fromJson),
   joinRules("m.room.join_rules", JoinRulesContent.fromJson),
   powerLevels("m.room.power_levels", PowerLevelsContent.fromJson),

lib/models/content/history_visibility.dart

@@ -0,0 +1,19 @@
+import "package:freezed_annotation/freezed_annotation.dart";
+import "package:nexus/models/content/content.dart";
+part "history_visibility.freezed.dart";
+part "history_visibility.g.dart";
+
+@freezed
+abstract class HistoryVisibilityContent extends Content
+    with _$HistoryVisibilityContent {
+  HistoryVisibilityContent._();
+  factory HistoryVisibilityContent({
+    required HistoryVisibility historyVisibility,
+  }) = _HistoryVisibilityContent;
+
+  factory HistoryVisibilityContent.fromJson(Map<String, Object?> json) =>
+      _$HistoryVisibilityContentFromJson(json);
+}
+
+@JsonEnum(fieldRename: FieldRename.snake)
+enum HistoryVisibility { invited, joined, shared, worldReadable }

lib/widgets/renderers/event.dart

@@ -7,8 +7,11 @@ import "package:nexus/models/content/canonical_alias.dart";
 import "package:nexus/models/content/content.dart";
 import "package:nexus/models/content/create.dart";
 import "package:nexus/models/content/encrypted.dart";
+import "package:nexus/models/content/history_visibility.dart";
+import "package:nexus/models/content/join_rules.dart";
 import "package:nexus/models/content/membership.dart";
 import "package:nexus/models/content/message.dart";
+import "package:nexus/models/content/power_levels.dart";
 import "package:nexus/models/event.dart";
 import "package:nexus/widgets/lazy_loading/message_displayname.dart";
 import "package:nexus/widgets/renderers/message.dart";
@@ -67,6 +70,26 @@ class EventRenderer extends ConsumerWidget {
               MessageDisplayname(event),
               Text("created the room"),
             ]),
+            PowerLevelsContent() => GenericEventRenderer(Icons.add, [
+              MessageDisplayname(event),
+              Text("changed the room's power levels"),
+            ]),
+            JoinRulesContent() => GenericEventRenderer(Icons.add, [
+              MessageDisplayname(event),
+              Text("changed the room's join rules"),
+            ]),
+            HistoryVisibilityContent(:final historyVisibility) =>
+              GenericEventRenderer(Icons.history, [
+                MessageDisplayname(event),
+                Text(
+                  "changed the room's history visibility to ${switch (historyVisibility) {
+                    HistoryVisibility.invited => "since invited",
+                    HistoryVisibility.joined => "since joined",
+                    HistoryVisibility.shared => "all history visible (shared)",
+                    HistoryVisibility.worldReadable => "all history visible (world readable)",
+                  }}",
+                ),
+              ]),
             CanonicalAliasContent(:final alias, :final altAliases) =>
               GenericEventRenderer(Icons.numbers, [
                 MessageDisplayname(event),