Method clear

Telegram/SourceFiles/data/data_session.cpp:404–473

}

void Session::clear() {
	_sessionDataAboutToBeCleared.fire({});

	// Optimization: clear notifications before destroying items.
	Core::App().notifications().clearFromSession(_session);

	// We must clear all [mono]forums before clearing customEmojiManager.
	// Because in Data::ForumTopic an Ui::Text::CustomEmoji is cached.
	auto botForums = base::flat_set<not_null<UserData*>>();
	auto channelForums = base::flat_set<not_null<ChannelData*>>();
	for (const auto &[peerId, peer] : _peers) {
		if (const auto bot = peer->asBot()) {
			if (bot->isForum()) {
				botForums.emplace(bot);
			}
		}
		if (const auto channel = peer->asChannel()) {
			if (channel->isForum() || channel->amMonoforumAdmin()) {
				channelForums.emplace(channel);
			}
		}
	}
	for (const auto &bot : botForums) {
		bot->setFlags(bot->flags() & ~UserDataFlag::Forum);
	}
	for (const auto &channel : channelForums) {
		channel->setFlags(channel->flags()
			& ~(ChannelDataFlag::Forum | ChannelDataFlag::MonoforumAdmin));
	}
	_savedMusic->clear();
	_savedMessages->clear();

	_sendActionManager->clear();

	_histories->unloadAll();
	_shortcutMessages = nullptr;
	_session->scheduledMessages().clear();
	_session->sponsoredMessages().clear();

	// Items are gone now, so HistoryMessageReply::resolvedStory raw
	// pointers no longer linger. Tear stories down here so their
	// shared_ptr<GroupCall> drops while Main::Session::_data still
	// holds a live pointer to us; otherwise the GroupCall destructor
	// would run inside ~Data::Session and find data() returning a
	// null reference (the parent unique_ptr resets its stored pointer
	// before invoking the deleter).
	_stories->clear();

	_dependentMessages.clear();
	base::take(_messages);
	base::take(_nonChannelMessages);
	_messageByRandomId.clear();
	_sentMessagesData.clear();
	cSetRecentStickers(RecentStickerPack());
	HistoryView::Element::ClearGlobal();
	_contactsNoChatsList.clear();
	_contactsList.clear();
	_chatsList.clear();