add a global toggle to hide membership events (#142)

fixes #141

Co-authored-by: seres <seres@seres.eu.org>
Reviewed-on: #142

lib/controllers/settings_sections.dart

@@ -166,6 +166,21 @@ class SettingsSectionsController
                     : null,
               ),
             ),
+            .new(
+              title: "Hide Membership Events",
+              description: "Hides membership events (invites, joins, leaves, bans & knocks) from appearing in conversations.",
+              icon: Icons.person_off,
+              builder: (title, description, icon) => SwitchListTile(
+                title: Text(title),
+                subtitle: Text(description),
+                secondary: Icon(icon),
+                value: settings.hideMembershipEvents,
+                onChanged: (value) => ref
+                    .read(SettingsController.provider.notifier)
+                    .set(settings.copyWith(hideMembershipEvents: value))
+                    .onError(showError),
+              ),
+            ),
           ]),
         ),
       ]),

lib/models/settings.dart

@@ -14,6 +14,7 @@ class const Settings({
   final bool showAllInHome = false,
   final bool showMinimizeButton = false,
   final bool swipeToReply = false,
+  final bool hideMembershipEvents = false,
   final RoomOrder roomOrder = .unreadFirst,
 }) with _$Settings {
   Map<String, Object?> toJson() => _$SettingsToJson(this);

lib/widgets/renderers/event.dart

@@ -6,6 +6,7 @@ import "package:hooks_riverpod/hooks_riverpod.dart";
 import "package:nexus/controllers/event.dart";
 import "package:nexus/controllers/room_chat.dart";
 import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/settings.dart";
 import "package:nexus/helpers/extensions/show_adaptive_menu.dart";
 import "package:nexus/helpers/hooks/chat_scroll.dart";
 import "package:nexus/models/content/avatar.dart";
@@ -78,6 +79,17 @@ class const EventRenderer(
 
     if (event == null) return SizedBox.shrink();
 
+    final hideMembershipEvents = (ref
+        .watch(SettingsController.provider)
+        .maybeWhen(
+          orElse: () => false,
+          data: (settings) => settings.hideMembershipEvents,
+        ));
+
+    if (event.content is MembershipContent && hideMembershipEvents) {
+      return SizedBox.shrink();
+    }
+
     final isGrouped =
         previousEvent?.content is MessageContent &&
         previousEvent?.redactedBy == null &&