Method loadAround

Telegram/SourceFiles/data/data_replies_list.cpp:528–582

}

void RepliesList::loadAround(MsgId id) {
	Expects(!_creating);

	if (_loadingAround && *_loadingAround == id) {
		return;
	}
	histories().cancelRequest(base::take(_beforeId));
	histories().cancelRequest(base::take(_afterId));

	const auto send = [=](Fn<void()> finish) {
		return _history->session().api().request(MTPmessages_GetReplies(
			_history->peer->input(),
			MTP_int(_rootId),
			MTP_int(id), // offset_id
			MTP_int(0), // offset_date
			MTP_int(id ? (-kMessagesPerPage / 2) : 0), // add_offset
			MTP_int(kMessagesPerPage), // limit
			MTP_int(0), // max_id
			MTP_int(0), // min_id
			MTP_long(0) // hash
		)).done([=](const MTPmessages_Messages &result) {
			_beforeId = 0;
			_loadingAround = std::nullopt;
			finish();

			if (!id) {
				_skippedAfter = 0;
			} else {
				_skippedAfter = std::nullopt;
			}
			_skippedBefore = std::nullopt;
			_list.clear();
			if (processMessagesIsEmpty(result)) {
				_fullCount = _skippedBefore = _skippedAfter = 0;
			} else if (id) {
				Assert(!_list.empty());
				if (_list.front() <= id) {
					_skippedAfter = 0;
				} else if (_list.back() >= id) {
					_skippedBefore = 0;
				}
			}
			checkReadTillEnd();
		}).fail([=] {
			_beforeId = 0;
			_loadingAround = std::nullopt;
			finish();
		}).send();
	};
	_loadingAround = id;
	_beforeId = histories().sendRequest(
		_history,
		Histories::RequestType::History,
		send);
}

void RepliesList::loadBefore() {
	Expects(!_list.empty());