Remove story viewer cache.

td/telegram/StoryManager.cpp

@@ -1209,7 +1209,6 @@ void StoryManager::on_story_can_get_viewers_timeout(int64 story_global_id) {
     // can_get_viewers flag has changed
     send_update_story(story_full_id, story);
   }
-  cached_story_viewers_.erase(story_full_id);
 }
 
 void StoryManager::load_expired_database_stories() {
@@ -2344,18 +2343,6 @@ void StoryManager::get_story_viewers(StoryId story_id, const td_api::storyViewer
   }
   StoryViewer offset_viewer{UserId(offset_user_id), offset_date};
 
-  auto &cached_viewers = cached_story_viewers_[story_full_id];
-  if (cached_viewers != nullptr && story->content_ != nullptr &&
-      (cached_viewers->total_count_ == story->interaction_info_.get_view_count() || !offset_viewer.is_empty())) {
-    auto result = cached_viewers->viewers_.get_sublist(offset_viewer, limit);
-    if (!result.is_empty()) {
-      // can return the viewers
-      // don't need to reget the viewers, because story->interaction_info_.get_view_count() is updated every 10 seconds
-      td_->contacts_manager_->on_view_user_active_stories(result.get_user_ids());
-      return promise.set_value(result.get_story_viewers_object(td_->contacts_manager_.get()));
-    }
-  }
-
   auto query_promise = PromiseCreator::lambda(
       [actor_id = actor_id(this), story_id, offset_viewer, promise = std::move(promise)](
           Result<telegram_api::object_ptr<telegram_api::stories_storyViewsList>> result) mutable {
@@ -2401,16 +2388,6 @@ void StoryManager::on_get_story_viewers(
       }
       on_story_changed(story_full_id, story, true, true);
     }
-    auto &cached_viewers = cached_story_viewers_[story_full_id];
-    if (cached_viewers == nullptr) {
-      cached_viewers = make_unique<CachedStoryViewers>();
-    }
-    if (total_count < cached_viewers->total_count_) {
-      LOG(ERROR) << "Total viewer count decreased from " << cached_viewers->total_count_ << " to " << total_count;
-    } else {
-      cached_viewers->total_count_ = total_count;
-    }
-    cached_viewers->viewers_.add_sublist(offset, story_viewers);
   }
 
   td_->contacts_manager_->on_view_user_active_stories(story_viewers.get_user_ids());
@@ -2945,7 +2922,6 @@ void StoryManager::on_delete_story(StoryFullId story_full_id) {
     being_edited_stories_.erase(edited_stories_it);
   }
   edit_generations_.erase(story_full_id);
-  cached_story_viewers_.erase(story_full_id);
 
   auto active_stories = get_active_stories_force(owner_dialog_id, "on_get_deleted_story");
   if (active_stories != nullptr && contains(active_stories->story_ids_, story_id)) {

td/telegram/StoryManager.h

@@ -157,11 +157,6 @@ class StoryManager final : public Actor {
     void parse(ParserT &parser);
   };
 
-  struct CachedStoryViewers {
-    int32 total_count_ = -1;
-    StoryViewers viewers_;
-  };
-
   struct StoryList {
     int32 server_total_count_ = -1;
     int32 sent_total_count_ = -1;
@@ -571,8 +566,6 @@ class StoryManager final : public Actor {
 
   FlatHashMap<StoryFullId, uint32, StoryFullIdHash> opened_stories_;
 
-  FlatHashMap<StoryFullId, unique_ptr<CachedStoryViewers>, StoryFullIdHash> cached_story_viewers_;
-
   FlatHashMap<StoryFullId, vector<Promise<Unit>>, StoryFullIdHash> reload_story_queries_;
 
   FlatHashMap<FileId, unique_ptr<PendingStory>, FileIdHash> being_uploaded_files_;

td/telegram/StoryViewer.cpp

@@ -41,41 +41,6 @@ StoryViewers::StoryViewers(vector<telegram_api::object_ptr<telegram_api::storyVi
   }
 }
 
-StoryViewers StoryViewers::get_sublist(const StoryViewer &offset, int32 limit) const {
-  StoryViewers result;
-  bool found = offset.is_empty();
-  for (auto &story_viewer : story_viewers_) {
-    if (found) {
-      if (limit-- <= 0) {
-        break;
-      }
-      result.story_viewers_.push_back(story_viewer);
-    } else if (story_viewer == offset) {
-      found = true;
-    }
-  }
-  return result;
-}
-
-void StoryViewers::add_sublist(const StoryViewer &offset, const StoryViewers &sublist) {
-  if (offset.is_empty()) {
-    if (story_viewers_.empty()) {
-      story_viewers_ = sublist.story_viewers_;
-    } else {
-      auto old_viewers = std::move(story_viewers_);
-      for (auto &viewer : sublist.story_viewers_) {
-        if (viewer == old_viewers[0]) {
-          append(story_viewers_, old_viewers);
-          return;
-        }
-        story_viewers_.push_back(viewer);
-      }
-    }
-  } else if (!story_viewers_.empty() && story_viewers_.back() == offset) {
-    append(story_viewers_, sublist.story_viewers_);
-  }
-}
-
 vector<UserId> StoryViewers::get_user_ids() const {
   return transform(story_viewers_, [](auto &viewer) { return viewer.get_user_id(); });
 }

td/telegram/StoryViewer.h

@@ -60,10 +60,6 @@ class StoryViewers {
     return story_viewers_.empty();
   }
 
-  StoryViewers get_sublist(const StoryViewer &offset, int32 limit) const;
-
-  void add_sublist(const StoryViewer &offset, const StoryViewers &sublist);
-
   vector<UserId> get_user_ids() const;
 
   td_api::object_ptr<td_api::storyViewers> get_story_viewers_object(ContactsManager *contacts_manager) const;