tdlight/td/telegram/CountryInfoManager.cpp

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/telegram/CountryInfoManager.h"

#include "td/telegram/Global.h"
#include "td/telegram/Td.h"
#include "td/telegram/telegram_api.h"

#include "td/utils/buffer.h"
#include "td/utils/Status.h"

namespace td {

class GetNearestDcQuery : public Td::ResultHandler {
  Promise<string> promise_;

 public:
  explicit GetNearestDcQuery(Promise<string> &&promise) : promise_(std::move(promise)) {
  }

  void send() {
    send_query(G()->net_query_creator().create_unauth(telegram_api::help_getNearestDc()));
  }

  void on_result(uint64 id, BufferSlice packet) override {
    auto result_ptr = fetch_result<telegram_api::help_getNearestDc>(packet);
    if (result_ptr.is_error()) {
      return on_error(id, result_ptr.move_as_error());
    }

    auto result = result_ptr.move_as_ok();
    promise_.set_value(std::move(result->country_));
  }

  void on_error(uint64 id, Status status) override {
    if (!G()->is_expected_error(status) && status.message() != "BOT_METHOD_INVALID") {
      LOG(ERROR) << "GetNearestDc returned " << status;
    }
    promise_.set_error(std::move(status));
  }
};

CountryInfoManager::CountryInfoManager(Td *td, ActorShared<> parent) : td_(td), parent_(std::move(parent)) {
}

void CountryInfoManager::tear_down() {
  parent_.reset();
}

void CountryInfoManager::get_current_country_code(Promise<string> &&promise) {
  td_->create_handler<GetNearestDcQuery>(std::move(promise))->send();
}

}  // namespace td