Add td_api::getMessageReadDate.

td/generate/scheme/td_api.tl

@@ -1154,6 +1154,9 @@ chatMessageSender sender:MessageSender needs_premium:Bool = ChatMessageSender;
 chatMessageSenders senders:vector<chatMessageSender> = ChatMessageSenders;
 
 
+//@description Contains read date of a recent outgoing message in a private chat @read_date Point in time (Unix timestamp) when the message was read by the other user
+messageReadDate read_date:int32 = MessageReadDate;
+
 //@description Represents a viewer of a message @user_id User identifier of the viewer @view_date Approximate point in time (Unix timestamp) when the message was viewed
 messageViewer user_id:int53 view_date:int32 = MessageViewer;
 
@@ -7088,6 +7091,11 @@ getMessages chat_id:int53 message_ids:vector<int53> = Messages;
 //@description Returns information about a message thread. Can be used only if message.can_get_message_thread == true @chat_id Chat identifier @message_id Identifier of the message
 getMessageThread chat_id:int53 message_id:int53 = MessageThreadInfo;
 
+//@description Returns read date of a recent outgoing message in a private chat. The method can be called if message.can_get_read_date == true
+//@chat_id Chat identifier
+//@message_id Identifier of the message
+getMessageReadDate chat_id:int53 message_id:int53 = MessageReadDate;
+
 //@description Returns viewers of a recent outgoing message in a basic group or a supergroup chat. For video notes and voice notes only users, opened content of the message, are returned. The method can be called if message.can_get_viewers == true
 //@chat_id Chat identifier
 //@message_id Identifier of the message

td/telegram/MessagesManager.cpp

@@ -717,6 +717,41 @@ class UnpinAllMessagesQuery final : public Td::ResultHandler {
   }
 };
 
+class GetOutboxReadDateQuery final : public Td::ResultHandler {
+  Promise<td_api::object_ptr<td_api::messageReadDate>> promise_;
+  DialogId dialog_id_;
+  MessageId message_id_;
+
+ public:
+  explicit GetOutboxReadDateQuery(Promise<td_api::object_ptr<td_api::messageReadDate>> &&promise)
+      : promise_(std::move(promise)) {
+  }
+
+  void send(DialogId dialog_id, MessageId message_id) {
+    dialog_id_ = dialog_id;
+    message_id_ = message_id;
+    auto input_peer = td_->dialog_manager_->get_input_peer(dialog_id, AccessRights::Read);
+    CHECK(input_peer != nullptr);
+    send_query(G()->net_query_creator().create(
+        telegram_api::messages_getOutboxReadDate(std::move(input_peer), message_id.get_server_message_id().get())));
+  }
+
+  void on_result(BufferSlice packet) final {
+    auto result_ptr = fetch_result<telegram_api::messages_getOutboxReadDate>(packet);
+    if (result_ptr.is_error()) {
+      return on_error(result_ptr.move_as_error());
+    }
+
+    auto ptr = result_ptr.move_as_ok();
+    promise_.set_value(td_api::make_object<td_api::messageReadDate>(ptr->date_));
+  }
+
+  void on_error(Status status) final {
+    td_->messages_manager_->on_get_message_error(dialog_id_, message_id_, status, "GetOutboxReadDateQuery");
+    promise_.set_error(std::move(status));
+  }
+};
+
 class GetMessageReadParticipantsQuery final : public Td::ResultHandler {
   Promise<MessageViewers> promise_;
   DialogId dialog_id_;
@@ -17107,14 +17142,74 @@ td_api::object_ptr<td_api::messageThreadInfo> MessagesManager::get_message_threa
       info.unread_message_count, std::move(messages), std::move(draft_message));
 }
 
-Status MessagesManager::can_get_message_viewers(MessageFullId message_full_id) {
+Status MessagesManager::can_get_message_read_date(MessageFullId message_full_id) {
   auto dialog_id = message_full_id.get_dialog_id();
-  Dialog *d = get_dialog_force(dialog_id, "get_message_viewers");
+  Dialog *d = get_dialog_force(dialog_id, "can_get_message_read_date");
   if (d == nullptr) {
     return Status::Error(400, "Chat not found");
   }
 
-  auto m = get_message_force(d, message_full_id.get_message_id(), "get_message_viewers");
+  auto m = get_message_force(d, message_full_id.get_message_id(), "can_get_message_read_date");
+  if (m == nullptr) {
+    return Status::Error(400, "Message not found");
+  }
+
+  return can_get_message_read_date(dialog_id, m);
+}
+
+Status MessagesManager::can_get_message_read_date(DialogId dialog_id, const Message *m) const {
+  if (td_->auth_manager_->is_bot()) {
+    return Status::Error(400, "User is bot");
+  }
+  CHECK(m != nullptr);
+  if (!m->is_outgoing) {
+    return Status::Error(400, "Can't get read date of incoming messages");
+  }
+
+  if (dialog_id.get_type() != DialogType::User) {
+    return Status::Error(400, "Read date can be received only in private chats");
+  }
+  if (!td_->dialog_manager_->have_input_peer(dialog_id, AccessRights::Read)) {
+    return Status::Error(400, "Can't access the chat");
+  }
+  auto user_id = dialog_id.get_user_id();
+  if (td_->contacts_manager_->is_user_bot(user_id)) {
+    return Status::Error(400, "The user is a bot");
+  }
+  if (td_->contacts_manager_->is_user_support(user_id)) {
+    return Status::Error(400, "The user is a Telegram support account");
+  }
+
+  if (m->message_id.is_scheduled()) {
+    return Status::Error(400, "Scheduled messages can't be read");
+  }
+  if (m->message_id.is_yet_unsent()) {
+    return Status::Error(400, "Yet unsent messages can't be read");
+  }
+  if (m->message_id.is_local()) {
+    return Status::Error(400, "Local messages can't be read");
+  }
+  CHECK(m->message_id.is_server());
+
+  return Status::OK();
+}
+
+void MessagesManager::get_message_read_date(MessageFullId message_full_id,
+                                            Promise<td_api::object_ptr<td_api::messageReadDate>> &&promise) {
+  TRY_STATUS_PROMISE(promise, can_get_message_read_date(message_full_id));
+
+  td_->create_handler<GetOutboxReadDateQuery>(std::move(promise))
+      ->send(message_full_id.get_dialog_id(), message_full_id.get_message_id());
+}
+
+Status MessagesManager::can_get_message_viewers(MessageFullId message_full_id) {
+  auto dialog_id = message_full_id.get_dialog_id();
+  Dialog *d = get_dialog_force(dialog_id, "can_get_message_viewers");
+  if (d == nullptr) {
+    return Status::Error(400, "Chat not found");
+  }
+
+  auto m = get_message_force(d, message_full_id.get_message_id(), "can_get_message_viewers");
   if (m == nullptr) {
     return Status::Error(400, "Message not found");
   }

td/telegram/MessagesManager.h

@@ -606,6 +606,9 @@ class MessagesManager final : public Actor {
                                   DialogId dialog_id, MessageId message_id, DialogId expected_dialog_id,
                                   MessageId expected_message_id, Promise<MessageThreadInfo> promise);
 
+  void get_message_read_date(MessageFullId message_full_id,
+                             Promise<td_api::object_ptr<td_api::messageReadDate>> &&promise);
+
   void get_message_viewers(MessageFullId message_full_id,
                            Promise<td_api::object_ptr<td_api::messageViewers>> &&promise);
 
@@ -1705,6 +1708,10 @@ class MessagesManager final : public Actor {
 
   bool can_report_message_reactions(DialogId dialog_id, const Message *m) const;
 
+  Status can_get_message_read_date(MessageFullId message_full_id) TD_WARN_UNUSED_RESULT;
+
+  Status can_get_message_read_date(DialogId dialog_id, const Message *m) const TD_WARN_UNUSED_RESULT;
+
   Status can_get_message_viewers(MessageFullId message_full_id) TD_WARN_UNUSED_RESULT;
 
   Status can_get_message_viewers(DialogId dialog_id, const Message *m) const TD_WARN_UNUSED_RESULT;

td/telegram/Td.cpp

@@ -4704,6 +4704,13 @@ void Td::on_request(uint64 id, const td_api::getMessageThread &request) {
   CREATE_REQUEST(GetMessageThreadRequest, request.chat_id_, request.message_id_);
 }
 
+void Td::on_request(uint64 id, const td_api::getMessageReadDate &request) {
+  CHECK_IS_USER();
+  CREATE_REQUEST_PROMISE();
+  messages_manager_->get_message_read_date({DialogId(request.chat_id_), MessageId(request.message_id_)},
+                                           std::move(promise));
+}
+
 void Td::on_request(uint64 id, const td_api::getMessageViewers &request) {
   CHECK_IS_USER();
   CREATE_REQUEST_PROMISE();

td/telegram/Td.h

@@ -605,6 +605,8 @@ class Td final : public Actor {
 
   void on_request(uint64 id, const td_api::getMessageThread &request);
 
+  void on_request(uint64 id, const td_api::getMessageReadDate &request);
+
   void on_request(uint64 id, const td_api::getMessageViewers &request);
 
   void on_request(uint64 id, const td_api::getMessages &request);

td/telegram/cli.cpp

@@ -3652,6 +3652,11 @@ class CliClient final : public Actor {
       MessageId message_id;
       get_args(args, chat_id, message_id);
       send_request(td_api::make_object<td_api::getMessageThread>(chat_id, message_id));
+    } else if (op == "gmrd") {
+      ChatId chat_id;
+      MessageId message_id;
+      get_args(args, chat_id, message_id);
+      send_request(td_api::make_object<td_api::getMessageReadDate>(chat_id, message_id));
     } else if (op == "gmv") {
       ChatId chat_id;
       MessageId message_id;