Method unregisterMessage

Telegram/SourceFiles/data/data_session.cpp:3067–3091

}

void Session::unregisterMessage(not_null<HistoryItem*> item) {
	const auto peerId = item->history()->peer->id;
	const auto itemId = item->id;
	_itemRemoved.fire_copy(item);
	if (item->hasPossibleRestrictions()) {
		_possiblyRestricted.remove(item);
	}
	session().changes().messageUpdated(
		item,
		Data::MessageUpdate::Flag::Destroyed);
	groups().unregisterMessage(item);
	removeDependencyMessage(item);
	for (auto i = begin(_highlightings); i != end(_highlightings);) {
		if (i->second == item) {
			i = _highlightings.erase(i);
		} else {
			++i;
		}
	}
	messagesListForInsert(peerId)->erase(itemId);

	if (!peerIsChannel(peerId) && IsServerMsgId(itemId)) {
		_nonChannelMessages.erase(itemId);
	}
}

MsgId Session::nextLocalMessageId() {
	Expects(_localMessageIdCounter < EndClientMsgId);