feat: Stories

lib/utils/client_manager.dart

@@ -85,7 +85,12 @@ abstract class ClientManager {
           if (kIsWeb || PlatformInfos.isMobile || PlatformInfos.isLinux)
             KeyVerificationMethod.emoji,
         },
-        importantStateEvents: <String>{'im.ponies.room_emotes'},
+        importantStateEvents: <String>{
+          // To make room emotes work
+          'im.ponies.room_emotes',
+          // To check which story room we can post in
+          EventTypes.RoomPowerLevels,
+        },
         databaseBuilder: FlutterFluffyBoxDatabase.databaseBuilder,
         legacyDatabaseBuilder: FlutterMatrixHiveStore.hiveDatabaseBuilder,
         supportedLoginTypes: {

lib/utils/matrix_sdk_extensions.dart/client_stories_extension.dart

@@ -0,0 +1,88 @@
+//@dart=2.12
+
+import 'package:flutter/cupertino.dart';
+
+import 'package:adaptive_dialog/adaptive_dialog.dart';
+import 'package:matrix/matrix.dart';
+
+extension ClientStoriesExtension on Client {
+  static const String _storiesRoomType = 'msc3588.stories.stories-room';
+  static const String _storiesBlockListType = 'msc3588.stories.block-list';
+
+  static const int lifeTimeInHours = 24;
+  static const int maxPostsPerStory = 20;
+
+  List<User> get contacts => rooms
+      .where((room) => room.isDirectChat)
+      .map((room) => room.getUserByMXIDSync(room.directChatMatrixID!))
+      .toList();
+
+  List<Room> get storiesRooms => rooms
+      .where((room) =>
+          room
+              .getState(EventTypes.RoomCreate)
+              ?.content
+              .tryGet<String>('type') ==
+          _storiesRoomType)
+      .toList();
+
+  Future<List<User>> getUndecidedContactsForStories(Room? storiesRoom) async {
+    if (storiesRoom == null) return contacts;
+    final invitedContacts =
+        (await storiesRoom.requestParticipants()).map((user) => user.id);
+    final decidedContacts = storiesBlockList.toSet()..addAll(invitedContacts);
+    return contacts
+        .where((contact) => !decidedContacts.contains(contact.id))
+        .toList();
+  }
+
+  List<String> get storiesBlockList =>
+      accountData[_storiesBlockListType]?.content.tryGetList<String>('users') ??
+      [];
+
+  Future<void> setStoriesBlockList(List<String> users) => setAccountData(
+        userID!,
+        _storiesBlockListType,
+        {'users': users},
+      );
+
+  Future<void> createStoriesRoom([List<String>? invite]) async {
+    final roomId = await createRoom(
+      creationContent: {"type": "msc3588.stories.stories-room"},
+      preset: CreateRoomPreset.privateChat,
+      powerLevelContentOverride: {"events_default": 100},
+      name: 'Stories from ${userID!.localpart}',
+      initialState: [
+        StateEvent(
+          type: EventTypes.Encryption,
+          stateKey: '',
+          content: {
+            'algorithm': 'm.megolm.v1.aes-sha2',
+          },
+        ),
+      ],
+      invite: invite,
+    );
+    if (getRoomById(roomId) == null) {
+      // Wait for room actually appears in sync
+      await onSync.stream
+          .firstWhere((sync) => sync.rooms?.join?.containsKey(roomId) ?? false);
+    }
+  }
+
+  Future<Room?> getStoriesRoom(BuildContext context) async {
+    final candidates = rooms.where((room) =>
+        room.getState(EventTypes.RoomCreate)?.content.tryGet<String>('type') ==
+            _storiesRoomType &&
+        room.ownPowerLevel >= 100);
+    if (candidates.isEmpty) return null;
+    if (candidates.length == 1) return candidates.single;
+    return await showModalActionSheet<Room>(
+        context: context,
+        actions: candidates
+            .map(
+              (room) => SheetAction(label: room.displayname, key: room),
+            )
+            .toList());
+  }
+}