Add td_api::getStoryViewers.

td/generate/scheme/td_api.tl

@@ -7283,6 +7283,12 @@ openStory story_sender_user_id:int53 story_id:int32 = Ok;
 //@story_id The identifier of the story
 closeStory story_sender_user_id:int53 story_id:int32 = Ok;
 
+//@description Returns viewers of a recent outgoing story. The method can be called if story.can_get_viewers == true
+//@story_id Story identifier
+//@offset_viewer A viewer from which to return next viewers; pass null to get results from the beginning
+//@limit The maximum number of story viewers to return
+getStoryViewers story_id:int32 offset_viewer:messageViewer limit:int32 = MessageViewers;
+
 
 //@description Returns information about a bot that can be added to attachment menu @bot_user_id Bot's user identifier
 getAttachmentMenuBot bot_user_id:int53 = AttachmentMenuBot;

td/telegram/MessageViewer.cpp

@@ -13,7 +13,7 @@
 namespace td {
 
 MessageViewer::MessageViewer(telegram_api::object_ptr<telegram_api::readParticipantDate> &&read_date)
-    : user_id_(read_date->user_id_), date_(read_date->date_) {
+    : MessageViewer(UserId(read_date->user_id_), read_date->date_) {
 }
 
 td_api::object_ptr<td_api::messageViewer> MessageViewer::get_message_viewer_object(
@@ -26,6 +26,17 @@ StringBuilder &operator<<(StringBuilder &string_builder, const MessageViewer &vi
   return string_builder << '[' << viewer.user_id_ << " at " << viewer.date_ << ']';
 }
 
+MessageViewers::MessageViewers(vector<telegram_api::object_ptr<telegram_api::storyView>> &&story_views) {
+  for (auto &story_view : story_views) {
+    UserId user_id(story_view->user_id_);
+    if (!user_id.is_valid()) {
+      LOG(ERROR) << "Receive " << user_id << " as story viewer";
+      continue;
+    }
+    message_viewers_.emplace_back(user_id, story_view->date_);
+  }
+}
+
 MessageViewers::MessageViewers(vector<telegram_api::object_ptr<telegram_api::readParticipantDate>> &&read_dates)
     : message_viewers_(
           transform(std::move(read_dates), [](telegram_api::object_ptr<telegram_api::readParticipantDate> &&read_date) {

td/telegram/MessageViewer.h

@@ -26,6 +26,9 @@ class MessageViewer {
  public:
   explicit MessageViewer(telegram_api::object_ptr<telegram_api::readParticipantDate> &&read_date);
 
+  MessageViewer(UserId user_id, int32 date) : user_id_(user_id), date_(td::max(date, static_cast<int32>(0))) {
+  }
+
   UserId get_user_id() const {
     return user_id_;
   }
@@ -38,6 +41,8 @@ StringBuilder &operator<<(StringBuilder &string_builder, const MessageViewer &vi
 struct MessageViewers {
   vector<MessageViewer> message_viewers_;
 
+  explicit MessageViewers(vector<telegram_api::object_ptr<telegram_api::storyView>> &&story_views);
+
   explicit MessageViewers(vector<telegram_api::object_ptr<telegram_api::readParticipantDate>> &&read_dates);
 
   td_api::object_ptr<td_api::messageViewers> get_message_viewers_object(ContactsManager *contacts_manager) const;

td/telegram/StoryInteractionInfo.h

@@ -36,6 +36,14 @@ class StoryInteractionInfo {
     return view_count_ < 0;
   }
 
+  bool set_view_count(int32 view_count) {
+    if (view_count > view_count_) {
+      view_count = view_count_;
+      return true;
+    }
+    return false;
+  }
+
   td_api::object_ptr<td_api::storyInteractionInfo> get_story_interaction_info_object(Td *td) const;
 };
 

td/telegram/StoryManager.cpp

@@ -16,6 +16,7 @@
 #include "td/telegram/logevent/LogEventHelper.h"
 #include "td/telegram/MessageEntity.h"
 #include "td/telegram/MessagesManager.h"
+#include "td/telegram/MessageViewer.h"
 #include "td/telegram/OptionManager.h"
 #include "td/telegram/StoryContent.h"
 #include "td/telegram/StoryContentType.h"
@@ -162,6 +163,33 @@ class ReadStoriesQuery final : public Td::ResultHandler {
   }
 };
 
+class GetStoryViewsListQuery final : public Td::ResultHandler {
+  Promise<telegram_api::object_ptr<telegram_api::stories_storyViewsList>> promise_;
+
+ public:
+  explicit GetStoryViewsListQuery(Promise<telegram_api::object_ptr<telegram_api::stories_storyViewsList>> &&promise)
+      : promise_(std::move(promise)) {
+  }
+
+  void send(StoryId story_id, int32 offset_date, int64 offset_user_id, int32 limit) {
+    send_query(G()->net_query_creator().create(
+        telegram_api::stories_getStoryViewsList(story_id.get(), offset_date, offset_user_id, limit)));
+  }
+
+  void on_result(BufferSlice packet) final {
+    auto result_ptr = fetch_result<telegram_api::stories_getStoryViewsList>(packet);
+    if (result_ptr.is_error()) {
+      return on_error(result_ptr.move_as_error());
+    }
+
+    promise_.set_value(result_ptr.move_as_ok());
+  }
+
+  void on_error(Status status) final {
+    promise_.set_error(std::move(status));
+  }
+};
+
 class GetStoriesByIDQuery final : public Td::ResultHandler {
   Promise<Unit> promise_;
   UserId user_id_;
@@ -962,6 +990,66 @@ void StoryManager::read_stories_on_server(DialogId owner_dialog_id, StoryId stor
   td_->create_handler<ReadStoriesQuery>(get_erase_log_event_promise(log_event_id))->send(owner_dialog_id, story_id);
 }
 
+void StoryManager::get_story_viewers(StoryId story_id, const td_api::messageViewer *offset, int32 limit,
+                                     Promise<td_api::object_ptr<td_api::messageViewers>> &&promise) {
+  DialogId owner_dialog_id(td_->contacts_manager_->get_my_id());
+  StoryFullId story_full_id{owner_dialog_id, story_id};
+  const Story *story = get_story(story_full_id);
+  if (story == nullptr) {
+    return promise.set_error(Status::Error(400, "Story not found"));
+  }
+  if (!story_id.is_server()) {
+    return promise.set_value(td_api::object_ptr<td_api::messageViewers>());
+  }
+  // TRY_STATUS_PROMISE(promise, can_get_story_viewers(story_full_id));
+
+  if (limit <= 0) {
+    return promise.set_error(Status::Error(400, "Parameter limit must be positive"));
+  }
+  int32 offset_date = 0;
+  int64 offset_user_id = 0;
+  if (offset != nullptr) {
+    offset_date = offset->view_date_;
+    offset_user_id = offset->user_id_;
+  }
+
+  auto query_promise = PromiseCreator::lambda(
+      [actor_id = actor_id(this), story_id, promise = std::move(promise)](
+          Result<telegram_api::object_ptr<telegram_api::stories_storyViewsList>> result) mutable {
+        send_closure(actor_id, &StoryManager::on_get_story_viewers, story_id, std::move(result), std::move(promise));
+      });
+
+  td_->create_handler<GetStoryViewsListQuery>(std::move(query_promise))
+      ->send(story_full_id.get_story_id(), offset_date, offset_user_id, limit);
+}
+
+void StoryManager::on_get_story_viewers(
+    StoryId story_id, Result<telegram_api::object_ptr<telegram_api::stories_storyViewsList>> r_view_list,
+    Promise<td_api::object_ptr<td_api::messageViewers>> &&promise) {
+  G()->ignore_result_if_closing(r_view_list);
+  if (r_view_list.is_error()) {
+    return promise.set_error(r_view_list.move_as_error());
+  }
+  auto view_list = r_view_list.move_as_ok();
+
+  DialogId owner_dialog_id(td_->contacts_manager_->get_my_id());
+  CHECK(story_id.is_server());
+  StoryFullId story_full_id{owner_dialog_id, story_id};
+  Story *story = get_story_editable(story_full_id);
+  if (story == nullptr) {
+    return promise.set_value(td_api::object_ptr<td_api::messageViewers>());
+  }
+
+  td_->contacts_manager_->on_get_users(std::move(view_list->users_), "on_get_story_viewers");
+
+  if (story->content_ != nullptr && story->interaction_info_.set_view_count(view_list->count_)) {
+    on_story_changed(story_full_id, story, true, true);
+  }
+
+  MessageViewers story_viewers(std::move(view_list->views_));
+  promise.set_value(story_viewers.get_message_viewers_object(td_->contacts_manager_.get()));
+}
+
 bool StoryManager::have_story(StoryFullId story_full_id) const {
   return get_story(story_full_id) != nullptr;
 }
@@ -1542,12 +1630,11 @@ void StoryManager::on_get_story_views(const vector<StoryId> &story_ids,
       continue;
     }
 
-    bool is_changed = false;
     StoryInteractionInfo interaction_info(td_, std::move(story_views->views_[i]));
     CHECK(!interaction_info.is_empty());
     if (story->interaction_info_ != interaction_info) {
       story->interaction_info_ = std::move(interaction_info);
-      on_story_changed(story_full_id, story, is_changed, false);
+      on_story_changed(story_full_id, story, true, true);
     }
   }
 }

td/telegram/StoryManager.h

@@ -120,6 +120,9 @@ class StoryManager final : public Actor {
 
   void close_story(DialogId owner_dialog_id, StoryId story_id, Promise<Unit> &&promise);
 
+  void get_story_viewers(StoryId story_id, const td_api::messageViewer *offset, int32 limit,
+                         Promise<td_api::object_ptr<td_api::messageViewers>> &&promise);
+
   StoryId on_get_story(DialogId owner_dialog_id, telegram_api::object_ptr<telegram_api::StoryItem> &&story_item_ptr);
 
   std::pair<int32, vector<StoryId>> on_get_stories(DialogId owner_dialog_id, vector<StoryId> &&expected_story_ids,
@@ -262,6 +265,10 @@ class StoryManager final : public Actor {
 
   void on_synchronized_archive_all_stories(bool set_archive_all_stories, Result<Unit> result);
 
+  void on_get_story_viewers(StoryId story_id,
+                            Result<telegram_api::object_ptr<telegram_api::stories_storyViewsList>> r_view_list,
+                            Promise<td_api::object_ptr<td_api::messageViewers>> &&promise);
+
   std::shared_ptr<UploadMediaCallback> upload_media_callback_;
 
   WaitFreeHashMap<StoryFullId, FileSourceId, StoryFullIdHash> story_full_id_to_file_source_id_;

td/telegram/Td.cpp

@@ -6457,6 +6457,13 @@ void Td::on_request(uint64 id, const td_api::closeStory &request) {
                               std::move(promise));
 }
 
+void Td::on_request(uint64 id, const td_api::getStoryViewers &request) {
+  CHECK_IS_USER();
+  CREATE_REQUEST_PROMISE();
+  story_manager_->get_story_viewers(StoryId(request.story_id_), request.offset_viewer_.get(), request.limit_,
+                                    std::move(promise));
+}
+
 void Td::on_request(uint64 id, const td_api::getAttachmentMenuBot &request) {
   CHECK_IS_USER();
   CREATE_REQUEST_PROMISE();

td/telegram/Td.h

@@ -1010,6 +1010,8 @@ class Td final : public Actor {
 
   void on_request(uint64 id, const td_api::closeStory &request);
 
+  void on_request(uint64 id, const td_api::getStoryViewers &request);
+
   void on_request(uint64 id, const td_api::getAttachmentMenuBot &request);
 
   void on_request(uint64 id, const td_api::toggleBotIsAddedToAttachmentMenu &request);

td/telegram/cli.cpp

@@ -4068,6 +4068,14 @@ class CliClient final : public Actor {
       StoryId story_id;
       get_args(args, story_sender_user_id, story_id);
       send_request(td_api::make_object<td_api::closeStory>(story_sender_user_id, story_id));
+    } else if (op == "gsv") {
+      StoryId story_id;
+      string limit;
+      int32 offset_date;
+      UserId offset_user_id;
+      get_args(args, story_id, limit, offset_date, offset_user_id);
+      send_request(td_api::make_object<td_api::getStoryViewers>(
+          story_id, td_api::make_object<td_api::messageViewer>(offset_user_id, offset_date), as_limit(limit)));
     } else if (op == "gamb") {
       UserId user_id;
       get_args(args, user_id);