Forums: Fix stuck unread badge when editing topics (#2701)

src/api/gramjs/apiBuilders/messages.ts

@@ -899,6 +899,7 @@ function buildAction(
   let score: number | undefined;
   let months: number | undefined;
   let topicEmojiIconId: string | undefined;
+  let isTopicAction: boolean | undefined;
 
   const targetUserIds = 'users' in action
     ? action.users && action.users.map((id) => buildApiPeerId(id, 'user'))
@@ -1063,6 +1064,7 @@ function buildAction(
     } else {
       text = 'ChatList.UnsupportedMessage';
     }
+    isTopicAction = true;
   } else if (action instanceof GramJs.MessageActionAttachMenuBotAllowed) {
     text = 'ActionAttachMenuBotAllowed';
   } else if (action instanceof GramJs.MessageActionSuggestProfilePhoto) {
@@ -1097,6 +1099,7 @@ function buildAction(
     score,
     months,
     topicEmojiIconId,
+    isTopicAction,
   };
 }
 

src/api/types/messages.ts

@@ -273,6 +273,7 @@ export interface ApiAction {
   score?: number;
   months?: number;
   topicEmojiIconId?: string;
+  isTopicAction?: boolean;
 }
 
 export interface ApiWebPage {

src/global/selectors/messages.ts

@@ -800,7 +800,9 @@ export function selectFirstUnreadId<T extends GlobalState>(
       return (
         (!lastReadId || id > lastReadId)
         && byId[id]
-        && (!byId[id].isOutgoing || byId[id].isFromScheduled)
+        // For some reason outgoing topic actions are not marked as read, thus we need to mark them as read
+        // when the edit message hits the viewport
+        && ((!byId[id].isOutgoing || byId[id].content.action?.isTopicAction) || byId[id].isFromScheduled)
         && id > lastReadServiceNotificationId
       );
     });