show mutual rooms in user popover

Fixes #97

lib/controllers/client.dart

@@ -371,6 +371,12 @@ class ClientController extends AsyncNotifier<int> {
   Future<void> exchangeToken(OAuthExchangeTokenRequest request) async =>
       await _sendCommand("oauth_exchange_token", request.toJson());
 
+  Future<IList<String>> getMutualRooms(String userId) async => IList(
+    ((await _sendCommand("get_mutual_rooms", {"user_id": userId}))["joined"]
+            as List?)
+        ?.cast<String>(),
+  );
+
   Future<SpecVersionsResponse> getSpecVersions() async =>
       .fromJson(await _sendCommand("get_versions"));
 

lib/controllers/mutual_rooms.dart

@@ -0,0 +1,15 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:nexus/controllers/client.dart";
+
+class MutualRoomsController(final String userId)
+    extends AsyncNotifier<IList<String>> {
+  @override
+  Future<IList<String>> build() =>
+      ref.read(ClientController.provider.notifier).getMutualRooms(userId);
+
+  static final provider = AsyncNotifierProvider.family
+      .autoDispose<MutualRoomsController, IList<String>, String>(
+        MutualRoomsController.new,
+      );
+}

lib/widgets/mutual_rooms_sheet.dart

@@ -0,0 +1,72 @@
+import "package:fast_immutable_collections/fast_immutable_collections.dart";
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/controllers/mutual_rooms.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/sidebar_page.dart";
+import "package:nexus/helpers/extensions/better_when.dart";
+import "package:nexus/helpers/extensions/focus_room.dart";
+import "package:nexus/widgets/avatar_or_hash.dart";
+import "package:nexus/widgets/sheet_layout.dart";
+
+/// The rooms the user shares with [userId].
+class const MutualRoomsSheet(final String userId, {super.key})
+    extends ConsumerWidget {
+  @override
+  Widget build(BuildContext context, WidgetRef ref) => SheetLayout(
+    title: Text("Mutual Rooms"),
+    actions: [
+      TextButton(onPressed: Navigator.of(context).pop, child: Text("Close")),
+    ],
+    children: [
+      ref
+          .watch(MutualRoomsController.provider(userId))
+          .betterWhen(
+            data: (roomIds) {
+              final rooms = ref.watch(
+                RoomsController.provider.select(
+                  (allRooms) => roomIds
+                      .map((roomId) => allRooms[roomId]?.metadata)
+                      .nonNulls
+                      .toIList(),
+                ),
+              );
+
+              return rooms.isEmpty
+                  ? Text("No mutual rooms")
+                  : Column(
+                      children: rooms
+                          .map(
+                            (room) => ListTile(
+                              leading: AvatarOrHash(
+                                room.avatar,
+                                room.name ?? "Unnamed Room",
+                                fallback: Icon(Icons.numbers),
+                              ),
+                              title: Text(
+                                room.name ?? "Unnamed Room",
+                                overflow: .ellipsis,
+                              ),
+                              onTap: () async {
+                                final container = ProviderScope.containerOf(
+                                  context,
+                                );
+                                // Closes the user popover under this too
+                                Navigator.of(context)
+                                    .popUntil((route) => route.isFirst);
+                                await container.focusRoom(room.id);
+                                container
+                                    .read(
+                                      SidebarPageController.provider.notifier,
+                                    )
+                                    .set(.rooms);
+                              },
+                            ),
+                          )
+                          .toList(),
+                    );
+            },
+          ),
+    ],
+  );
+}

lib/widgets/read_receipts_sheet.dart

@@ -38,7 +38,6 @@ class const ReadReceiptsSheet(
               final name = member?.displayName ?? receipt.userId.localpart;
 
               return ListTile(
-                contentPadding: .zero,
                 leading: AvatarOrHash(member?.avatarUrl, name, dimension: 40),
                 title: Text(name, overflow: .ellipsis),
                 subtitle: Text(receipt.userId, overflow: .ellipsis),

lib/widgets/user_bottom_sheet.dart

@@ -8,6 +8,7 @@ import "package:intl/intl.dart";
 import "package:m3e_buttons/m3e_buttons.dart";
 import "package:nexus/controllers/client.dart";
 import "package:nexus/controllers/client_state.dart";
+import "package:nexus/controllers/mutual_rooms.dart";
 import "package:nexus/controllers/power_level.dart";
 import "package:nexus/controllers/profile.dart";
 import "package:nexus/controllers/rooms.dart";
@@ -18,6 +19,7 @@ import "package:nexus/helpers/extensions/show_adaptive_sheet.dart";
 import "package:nexus/helpers/extensions/get_localpart.dart";
 import "package:nexus/widgets/error_dialog.dart";
 import "package:nexus/widgets/loading.dart";
+import "package:nexus/widgets/mutual_rooms_sheet.dart";
 import "package:nexus/models/membership_action.dart";
 import "package:nexus/widgets/avatar_or_hash.dart";
 import "package:nexus/main.dart";
@@ -141,9 +143,6 @@ final class const UserBottomSheet(
                     loading: () => Text(""),
                     data: (profileResponse) => Column(
                       children: [
-                        if (profileResponse.profile.timezone == null &&
-                            profileResponse.profile.pronouns.isEmpty)
-                          Text(""),
                         Wrap(
                           crossAxisAlignment: .center,
                           alignment: .center,
@@ -195,6 +194,26 @@ final class const UserBottomSheet(
                     ),
                   ),
 
+              if (userId != ref.watch(ClientStateController.provider)?.userId)
+                switch (ref.watch(MutualRoomsController.provider(userId))) {
+                  AsyncData(value: final roomIds) => switch (ref.watch(
+                    RoomsController.provider.select(
+                      (rooms) => roomIds.where(rooms.containsKey).length,
+                    ),
+                  )) {
+                    0 => SizedBox.shrink(),
+                    final count => TextButton(
+                      onPressed: () => context.showAdaptiveSheet(
+                        (_) => MutualRoomsSheet(userId),
+                      ),
+                      child: Text(
+                        "$count mutual ${Intl.plural(count, one: "room", other: "rooms")}",
+                      ),
+                    ),
+                  },
+                  _ => SizedBox.shrink(),
+                },
+
               SizedBox(height: 8),
               if (userId !=
                   ref.watch(ClientStateController.provider)?.userId) ...[