path: root/src/Room.cpp

#include "../include/dchat/Room.hpp"
#include "../include/dchat/Storage.hpp"
#include "../include/dchat/FileUtil.hpp"
#include "../include/dchat/RoomDataType.hpp"
#include <odhtdb/Database.hpp>
#include <odhtdb/Log.hpp>
#include <odhtdb/bin2hex.hpp>
#include <odhtdb/hex2bin.hpp>
#include <sibs/SafeSerializer.hpp>
#include <sibs/SafeDeserializer.hpp>
#include <thread>

// TODO: Remove error checks when odhtdb has been improved to take care of such errors
namespace dchat
{
    Room::Room(Rooms *_rooms, std::shared_ptr<odhtdb::Hash> _id) : 
        rooms(_rooms),
        id(_id),
        userdata(nullptr)
    {
        
    }

    void Room::addUser(const odhtdb::Signature::PublicKey &userPublicKey, std::shared_ptr<Group> group)
    {
        assert(localUser);
        assert(publicKeyToKeyPairMap.find(localUser->publicKey) != publicKeyToKeyPairMap.end());
        assert(encryptionKey);
        auto keyPair = publicKeyToKeyPairMap[localUser->publicKey];
        odhtdb::DatabaseNode roomNode(encryptionKey, id);
        rooms->database->addUser(roomNode, *keyPair, userPublicKey, odhtdb::DataView(group->id, odhtdb::GROUP_ID_LENGTH));
    }

    std::shared_ptr<User> Room::addUserLocally(const odhtdb::Signature::PublicKey &userPublicKey, std::shared_ptr<Group> group)
    {
        auto existingUser = getUserByPublicKey(userPublicKey);
        if(existingUser)
        {
            odhtdb::Log::error("The user %s already exists in the room %s", userPublicKey.toString().c_str(), id->toString().c_str());
            assert(false);
            return nullptr;
        }

        auto user = std::make_shared<User>(userPublicKey);
        user->groups.push_back(group);
        userByPublicKey[userPublicKey] = user;
        return user;
    }

    std::shared_ptr<Group> Room::addGroupLocally(const odhtdb::DataView groupId)
    {
        auto existingGroup = getGroupById(groupId);
        if(existingGroup)
        {
            odhtdb::Log::error("The group %s already exists in the room %s", groupId.toString().c_str(), id->toString().c_str());
            assert(false);
            return nullptr;
        }

        auto group = std::make_shared<Group>();
        assert(groupId.size == odhtdb::GROUP_ID_LENGTH);
        memcpy(group->id, groupId.data, groupId.size);
        groups.push_back(group);
        return group;
    }

    std::shared_ptr<User> Room::getUserByPublicKey(const odhtdb::Signature::PublicKey &userPublicKey)
    {
        auto userIt = userByPublicKey.find(userPublicKey);
        if(userIt != userByPublicKey.end())
            return userIt->second;
        return nullptr;
    }

    std::shared_ptr<Group> Room::getGroupById(const odhtdb::DataView groupId)
    {
        for(std::shared_ptr<Group> &group : groups)
        {
            if(odhtdb::DataView(group->id, odhtdb::GROUP_ID_LENGTH) == groupId)
                return group;
        }
        return nullptr;
    }

    static std::string getInviteKeyChecksum(const std::string &inviteKey)
    {
        u8 checksum = 0x3d;
        for(char c : inviteKey)
        {
            checksum ^= c;
        }
        return odhtdb::bin2hex((const char*)&checksum, 1);
    }

    void Room::setLocalUser(std::shared_ptr<User> user, std::shared_ptr<odhtdb::Signature::KeyPair> keyPair)
    {
        if(localUser) return;
        assert(user->publicKey == keyPair->getPublicKey());
        assert(encryptionKey);
        localUser = user;
        publicKeyToKeyPairMap[user->publicKey] = keyPair;
        odhtdb::Log::debug("Local user set to %s for room %s", user->publicKey.toString().c_str(), id->toString().c_str());

        // Room id + room encryption key + invite key checksum (to verify invite key is not typed incorrectly)
        inviteKey = id->toString() + odhtdb::bin2hex((const char*)encryptionKey->data, encryptionKey->size);
        inviteKey += getInviteKeyChecksum(inviteKey);
        odhtdb::InfoHash inviteInfoHash = odhtdb::InfoHash::generateHash((const u8*)inviteKey.data(), inviteKey.size());
        // TODO: Use database instead of custom message. Then both parties dont have to be online to add user to room.
        // TODO: Only listen for invite request if we have the right to add users to the room.
        // TODO: Make this optional (should be possible to turn off from gui/settings)
        rooms->database->receiveCustomMessage(inviteInfoHash, [this](const void *data, usize size)
        {
            sibs::SafeSerializer serializer;
            try
            {
                odhtdb::Log::debug("Received request to invite user to room");
                sibs::SafeDeserializer deserializer((const u8*)data, size);
                u8 nonce[odhtdb::ENCRYPTION_NONCE_BYTE_SIZE];
                deserializer.extract(nonce, sizeof(nonce));
                odhtdb::Decryption decryptedData(
                    { (void*)deserializer.getBuffer(), deserializer.getSize() },
                    { nonce, sizeof(nonce) },
                    { (void*)encryptionKey->data, encryptionKey->size });

                sibs::SafeDeserializer deserializerMsg((const u8*)decryptedData.getDecryptedText().data, decryptedData.getDecryptedText().size);
                odhtdb::Signature::PublicKey userPublicKey;
                deserializerMsg.extract((u8*)userPublicKey.getData(), userPublicKey.getSize());
                auto user = getUserByPublicKey(userPublicKey);
                if(user)
                {
                    odhtdb::Log::warn("User %s wanted us to add them to the room %s but they are already a member of it", userPublicKey.toString().c_str(), id->toString().c_str());
                    // TODO: Return error message to user, so they can get a nice error message (or deny message)
                    return serializer;
                }

                std::string userMsg;
                if(!deserializerMsg.empty())
                {
                    userMsg.resize(deserializerMsg.getSize());
                    deserializerMsg.extract((u8*)&userMsg[0], deserializerMsg.getSize());
                }
                
                if(rooms->callbackFuncs.receiveInviteUserCallbackFunc)
                {
                    InviteUserRequest request;
                    request.room = this;
                    request.userPublicKey = std::move(userPublicKey);
                    request.message = std::move(userMsg);
                    rooms->callbackFuncs.receiveInviteUserCallbackFunc(request);
                }
            }
            catch(std::exception &e)
            {
                odhtdb::Log::warn("Failed to deserialize request to invite user to room");
            }
            return serializer;
        });
    }

    void Room::setAvatarUrl(const std::string &url)
    {
        assert(localUser);
        assert(publicKeyToKeyPairMap.find(localUser->publicKey) != publicKeyToKeyPairMap.end());
        assert(encryptionKey);

        sibs::SafeSerializer serializer;
        serializer.add(RoomDataType::CHANGE_AVATAR);
        serializer.add((u16)url.size());
        serializer.add(url.data(), url.size());
        auto keyPair = publicKeyToKeyPairMap[localUser->publicKey];
        odhtdb::DatabaseNode roomNode(encryptionKey, id);
        rooms->database->addData(roomNode, *keyPair, { serializer.getBuffer().data(), serializer.getSize() });
    }

    void Room::setUserNickname(const std::string &nickname)
    {
        assert(localUser);
        assert(publicKeyToKeyPairMap.find(localUser->publicKey) != publicKeyToKeyPairMap.end());
        assert(encryptionKey);

        sibs::SafeSerializer serializer;
        serializer.add(RoomDataType::NICKNAME_CHANGE);
        serializer.add((u8)nickname.size());
        serializer.add(nickname.data(), nickname.size());
        auto keyPair = publicKeyToKeyPairMap[localUser->publicKey];
        odhtdb::DatabaseNode roomNode(encryptionKey, id);
        rooms->database->addData(roomNode, *keyPair, { serializer.getBuffer().data(), serializer.getSize() });
    }

    bool Room::setName(const std::string &name)
    {
        assert(localUser);
        assert(encryptionKey);

        int userPermissionLevel = rooms->database->getUserLowestPermissionLevel(*id, localUser->publicKey);
        if(userPermissionLevel != odhtdb::PERMISSION_LEVEL_ADMIN)
        {    
            odhtdb::Log::debug("Room change name: attempted by user %s who is not an admin (permission level: %d)\n", localUser->publicKey.toString().c_str(), userPermissionLevel);
            return false;
        } 

        sibs::SafeSerializer serializer;
        serializer.add(RoomDataType::CHANGE_ROOM_NAME);
        serializer.add((u16)name.size());
        serializer.add(name.data(), name.size());
        auto keyPair = publicKeyToKeyPairMap[localUser->publicKey];
        odhtdb::DatabaseNode roomNode(encryptionKey, id);
        rooms->database->addData(roomNode, *keyPair, { serializer.getBuffer().data(), serializer.getSize() });
        return true;
    }

    void Room::publishMessage(const std::string &msg)
    {
        assert(localUser);
        assert(publicKeyToKeyPairMap.find(localUser->publicKey) != publicKeyToKeyPairMap.end());
        assert(encryptionKey);

        sibs::SafeSerializer serializer;
        serializer.add(RoomDataType::ADD_MESSAGE);
        serializer.add(msg.data(), msg.size());
        auto keyPair = publicKeyToKeyPairMap[localUser->publicKey];
        odhtdb::DatabaseNode roomNode(encryptionKey, id);
        rooms->database->addData(roomNode, *keyPair, { serializer.getBuffer().data(), serializer.getSize() });
    }

    Rooms::Rooms(const char *address, u16 port, RoomCallbackFuncs _callbackFuncs) :
        callbackFuncs(_callbackFuncs),
        loggedIn(false)
    {
        odhtdb::DatabaseCallbackFuncs databaseCallbackFuncs;
        databaseCallbackFuncs.createNodeCallbackFunc = std::bind(&Rooms::createNodeCallbackFunc, this, std::placeholders::_1);
        databaseCallbackFuncs.addNodeCallbackFunc = std::bind(&Rooms::addNodeCallbackFunc, this, std::placeholders::_1);
        databaseCallbackFuncs.addUserCallbackFunc = std::bind(&Rooms::addUserCallbackFunc, this, std::placeholders::_1);
        database = odhtdb::Database::connect(address, port, getDchatDir(), databaseCallbackFuncs).get();
    }

    void Rooms::createNodeCallbackFunc(const odhtdb::DatabaseCreateNodeRequest &request)
    {
        std::lock_guard<std::recursive_mutex> lock(roomModifyMutex);
        auto roomIt = roomById.find(*request.nodeHash);
        if(roomIt != roomById.end())
        {
            odhtdb::Log::error("Room %s has already been created once", request.nodeHash->toString().c_str());
            return;
        }

        auto roomId = std::make_shared<odhtdb::Hash>(*request.nodeHash);
        auto room = std::make_shared<Room>(this, roomId);
        auto encryptionKeyIt = roomEncryptionKey.find(*request.nodeHash);
        if(encryptionKeyIt != roomEncryptionKey.end())
            room->encryptionKey = encryptionKeyIt->second;
        roomById[*request.nodeHash] = room;
        if(callbackFuncs.createRoomCallbackFunc)
            callbackFuncs.createRoomCallbackFunc(room);

        auto group = room->addGroupLocally(request.groupId);
        auto user = room->addUserLocally(*request.creatorPublicKey, group);
        bool isLocalUser = false;
        if(!room->localUser)
        {
            auto localUserIt = roomLocalUser.find(*request.nodeHash);
            if(localUserIt != roomLocalUser.end() && user->publicKey == localUserIt->second->getPublicKey())
            {
                room->setLocalUser(user, localUserIt->second);
                isLocalUser = true;
            }
        }

        if(callbackFuncs.addUserCallbackFunc)
        {
            RoomAddUserRequest callbackRequest;
            callbackRequest.room = room;
            callbackRequest.user = user;
            callbackRequest.addedByUser = user;
            callbackRequest.timestampSeconds = ntp::NtpTimestamp::fromCombined(request.timestamp).seconds;
            callbackRequest.loadedFromCache = request.loadedFromCache;
            callbackRequest.isLocalUser = isLocalUser;
            callbackRequest.waitedToJoin = false;
            callbackFuncs.addUserCallbackFunc(callbackRequest);
        }
    }

    void Rooms::addNodeCallbackFunc(const odhtdb::DatabaseAddNodeRequest &request)
    {
        std::lock_guard<std::recursive_mutex> lock(roomModifyMutex);
        auto roomIt = roomById.find(*request.nodeHash);
        if(roomIt == roomById.end())
        {
            odhtdb::Log::error("Attempting to add data to node %s but the node has not been created", request.nodeHash->toString().c_str());
            return;
        }
        auto room = roomIt->second;

        auto user = room->getUserByPublicKey(*request.creatorPublicKey);
        if(!user)
        {
            odhtdb::Log::error("Attempting to add data to node %s but the the user %s doesn't exist in the node %s", request.creatorPublicKey->toString().c_str(), request.nodeHash->toString().c_str());
            return;
        }

        if(request.decryptedData.size == 0)
            return;

        uint32_t timestampSeconds = ntp::NtpTimestamp::fromCombined(request.timestamp).seconds;

        RoomDataType roomDataType = (RoomDataType)static_cast<const char*>(request.decryptedData.data)[0];
        try
        {
            switch(roomDataType)
            {
                case RoomDataType::ADD_MESSAGE:
                {
                    auto message = std::make_shared<RoomMessage>();
                    message->id = *request.requestHash;
                    message->creator = user;
                    message->timestampSeconds = timestampSeconds;
                    message->text = std::string((const char*)request.decryptedData.data + 1, request.decryptedData.size - 1);

                    RoomAddMessageRequest roomRequest;
                    roomRequest.room = room;
                    roomRequest.loadedFromCache = request.loadedFromCache;
                    roomRequest.message = std::move(message);
                    roomRequest.prevMessage = nullptr;
                    if(!room->messages.empty())
                        roomRequest.prevMessage = room->messages.back();
                    if(callbackFuncs.addMessageCallbackFunc)
                        callbackFuncs.addMessageCallbackFunc(roomRequest);

                    room->messages.push_back(std::move(roomRequest.message));
                    break;
                }
                case RoomDataType::NICKNAME_CHANGE:
                {
                    sibs::SafeDeserializer deserializer((const u8*)request.decryptedData.data + 1, request.decryptedData.size - 1);
                    u8 nameLength = deserializer.extract<u8>();
                    if(nameLength > 0)
                    {
                        std::string nickname;
                        nickname.resize(nameLength);
                        deserializer.extract((u8*)&nickname[0], nameLength);

                        UserChangeNicknameRequest roomRequest;
                        roomRequest.room = room;
                        roomRequest.user = user;
                        roomRequest.timestampSeconds = timestampSeconds;
                        roomRequest.loadedFromCache = request.loadedFromCache;
                        roomRequest.newNickname = nickname;
                        if(callbackFuncs.userChangeNicknameCallbackFunc)
                            callbackFuncs.userChangeNicknameCallbackFunc(roomRequest);
                        user->nickname = std::move(nickname);
                    }
                    break;
                }
                case RoomDataType::CHANGE_AVATAR:
                {
                    sibs::SafeDeserializer deserializer((const u8*)request.decryptedData.data + 1, request.decryptedData.size - 1);
                    u16 urlLength = deserializer.extract<u16>();
                    if(urlLength > 0)
                    {
                        std::string url;
                        url.resize(urlLength);
                        deserializer.extract((u8*)&url[0], urlLength);

                        UserChangeAvatarRequest roomRequest;
                        roomRequest.room = room;
                        roomRequest.user = user;
                        roomRequest.timestampSeconds = timestampSeconds;
                        roomRequest.loadedFromCache = request.loadedFromCache;
                        roomRequest.url = url;
                        if(callbackFuncs.userChangeAvatarCallbackFunc)
                            callbackFuncs.userChangeAvatarCallbackFunc(roomRequest);
                        user->avatarUrl = std::move(url);
                    }
                    break;
                }
                case RoomDataType::CHANGE_ROOM_NAME:
                {
                    int userPermissionLevel = database->getUserLowestPermissionLevel(*room->id, user->publicKey);
                    if(userPermissionLevel != odhtdb::PERMISSION_LEVEL_ADMIN)
                    {    
                        odhtdb::Log::debug("Room change name: attempted by user %s who is not an admin (permission level: %d)\n", user->publicKey.toString().c_str(), userPermissionLevel);
                        return;
                    }    
                    
                    sibs::SafeDeserializer deserializer((const u8*)request.decryptedData.data + 1, request.decryptedData.size - 1);
                    u16 channelNameLength = deserializer.extract<u16>();
                    if(channelNameLength > 0 && channelNameLength <= 32)
                    {
                        RoomChangeNameRequest roomRequest;
                        roomRequest.room = room;
                        roomRequest.user = user;
                        roomRequest.timestampSeconds = timestampSeconds;
                        roomRequest.loadedFromCache = request.loadedFromCache;
                        roomRequest.newName.resize(channelNameLength);
                        deserializer.extract((u8*)&roomRequest.newName[0], channelNameLength);
                        if(callbackFuncs.changeRoomNameCallbackFunc)
                            callbackFuncs.changeRoomNameCallbackFunc(roomRequest);
                        room->name = std::move(roomRequest.newName);
                    } 
                    break;
                }
                default:
                {
                    odhtdb::Log::warn("Rooms::addNodeCallbackFunc: Got unexpected room data type %d", roomDataType);
                    break;
                }
            }
        }
        catch(std::exception &e)
        {
            odhtdb::Log::warn("Failed to process add node request, reason: %s\n", e.what());
        }
    }

    void Rooms::addUserCallbackFunc(const odhtdb::DatabaseAddUserRequest &request)
    {
        std::lock_guard<std::recursive_mutex> lock(roomModifyMutex);
        auto roomIt = roomById.find(*request.nodeHash);
        if(roomIt == roomById.end())
        {
            odhtdb::Log::error("User %s was added to node %s but the node has not been created", 
                request.userToAddPublicKey->toString().c_str(), 
                request.nodeHash->toString().c_str());
            return;
        }

        auto room = roomIt->second;
        auto group = room->getGroupById(request.groupToAddUserTo);
        if(!group)
        {
            odhtdb::Log::error("User %s was added to node %s in a non-existing group %s", 
                request.userToAddPublicKey->toString().c_str(), 
                request.nodeHash->toString().c_str(),
                request.groupToAddUserTo.toString().c_str());
            return;
        }

        auto addedByUser = room->getUserByPublicKey(*request.creatorPublicKey);
        if(!addedByUser)
        {
            odhtdb::Log::error("User was added to room by admin that doesn't exist in room.... (bug?)");
            return;
        }

        auto user = room->addUserLocally(*request.userToAddPublicKey, group);
        bool isLocalUser = false;
        bool waitedToJoin = false;
        if(!room->localUser)
        {
            std::lock_guard<std::recursive_mutex> waitingToJoinRoomLock(waitingToJoinRoomMutex);
            auto waitingToJoinRoomIt = waitingToJoinRoom.find(*request.nodeHash);
            if(waitingToJoinRoomIt != waitingToJoinRoom.end() && user->publicKey == waitingToJoinRoomIt->second->getPublicKey())
            {
                room->setLocalUser(user, waitingToJoinRoomIt->second);
                waitingToJoinRoom.erase(waitingToJoinRoomIt);
                isLocalUser = true;
                waitedToJoin = true;
            }
            else
            {
                auto localUserIt = roomLocalUser.find(*request.nodeHash);
                if(localUserIt != roomLocalUser.end() && user->publicKey == localUserIt->second->getPublicKey())
                {
                    room->setLocalUser(user, localUserIt->second);
                    isLocalUser = true;
                }
            }
        }

        if(callbackFuncs.addUserCallbackFunc)
        {
            RoomAddUserRequest callbackRequest;
            callbackRequest.room = room;
            callbackRequest.user = user;
            callbackRequest.addedByUser = addedByUser;
            callbackRequest.timestampSeconds = ntp::NtpTimestamp::fromCombined(request.timestamp).seconds;
            callbackRequest.loadedFromCache = request.loadedFromCache;
            callbackRequest.isLocalUser = isLocalUser;
            callbackRequest.waitedToJoin = waitedToJoin;
            callbackFuncs.addUserCallbackFunc(callbackRequest);
        }
    }

    void Rooms::connect(const char *address, u16 port, RoomCallbackFuncs callbackFuncs)
    {
        assert(callbackFuncs.connectCallbackFunc);
        std::thread([](const char *address, u16 port, RoomCallbackFuncs callbackFuncs)
        {
            try
            {
                callbackFuncs.connectCallbackFunc(std::shared_ptr<Rooms>(new Rooms(address, port, callbackFuncs)), nullptr);
            }
            catch(std::exception &e)
            {
                callbackFuncs.connectCallbackFunc(nullptr, e.what());
            }
        }, address, port, callbackFuncs).detach();
    }

    // TODO: Add logout
    void Rooms::loginUser(const std::string &username, const std::string &password)
    {
        std::lock_guard<std::recursive_mutex> lock(roomModifyMutex);
        if(loggedIn)
            throw std::runtime_error(std::string("You are already logged in as ") + currentUsername);

        auto storedNodes = database->getStoredNodeUserInfoDecrypted(username, password);
        loggedIn = true;
        currentUsername = username;
        currentUserPassword = password;
        for(auto &nodeInfo : storedNodes)
        {
            roomLocalUser[nodeInfo.first] = nodeInfo.second.userKeyPair;
            roomEncryptionKey[nodeInfo.first] = nodeInfo.second.nodeEncryptionKey;

            auto roomId = std::make_shared<odhtdb::Hash>(nodeInfo.first);
            odhtdb::DatabaseNode roomNode(nodeInfo.second.nodeEncryptionKey, roomId);
            database->seed(roomNode);
            database->loadNode(nodeInfo.first);
        }
    }

    void Rooms::registerUser(const std::string &username, const std::string &password)
    {
        std::lock_guard<std::recursive_mutex> lock(roomModifyMutex);
        if(loggedIn)
            throw std::runtime_error(std::string("You are already logged in as ") + currentUsername);

        database->storeUserWithoutNodes(username, password);
        loggedIn = true;
        currentUsername = username;
        currentUserPassword = password;
    }

    std::shared_ptr<Room> Rooms::createRoom(const std::string &name)
    {
        std::lock_guard<std::recursive_mutex> lock(roomModifyMutex);
        if(!loggedIn)
            throw std::runtime_error("You need to be logged in to create a room");

        auto newNode = database->create();
        roomLocalUser[*newNode->getRequestHash()] = newNode->getNodeAdminKeyPair();
        roomEncryptionKey[*newNode->getRequestHash()] = newNode->getNodeEncryptionKey();
        auto roomIt = roomById.find(*newNode->getRequestHash());
        assert(roomIt != roomById.end());
        if(roomIt != roomById.end())
        {
            roomIt->second->encryptionKey = newNode->getNodeEncryptionKey();
            auto user = roomIt->second->getUserByPublicKey(newNode->getNodeAdminKeyPair()->getPublicKey());
            if(user)
            {
                roomIt->second->setLocalUser(user, newNode->getNodeAdminKeyPair());
            }
        }

        odhtdb::DatabaseNode nodeInfo(newNode->getNodeEncryptionKey(), newNode->getRequestHash());
        database->storeNodeInfoForUserEncrypted(nodeInfo, currentUsername, currentUserPassword, *newNode->getNodeAdminKeyPair());
        roomIt->second->setName(name);
        return roomIt->second;
    }

    bool Rooms::requestJoinRoom(const std::string &inviteKey, const std::string &message)
    {
        if(!loggedIn)
            throw std::runtime_error("You need to be logged in to join a room");

        if(inviteKey.size() != 130)
        {
            std::string errMsg = "Invalid invite key length. Expected to be 130 bytes, was ";
            errMsg += std::to_string(inviteKey.size());
            errMsg += " byte(s)";
            throw std::runtime_error(errMsg);
        }

        std::lock_guard<std::recursive_mutex> waitingToJoinRoomLock(waitingToJoinRoomMutex);
        std::string roomIdHex = inviteKey.substr(0, 64);
        std::string roomIdBin = odhtdb::hex2bin(roomIdHex.c_str(), roomIdHex.size());
        auto roomId = std::make_shared<odhtdb::Hash>();
        memcpy(roomId->getData(), roomIdBin.data(), roomIdBin.size());
        if(waitingToJoinRoom.find(*roomId) != waitingToJoinRoom.end())
        {
            fprintf(stderr, "You have already requested to join room %s\n", roomIdHex.c_str());
            return false;
        }
        if(roomById.find(*roomId) != roomById.end())
        {
            fprintf(stderr, "You are already a member of the room %s\n", roomIdHex.c_str());
            return false;
        }
        std::string roomEncryptionKeyHex = inviteKey.substr(64, 64);
        std::string roomEncryptionKeyStr = odhtdb::hex2bin(roomEncryptionKeyHex.c_str(), roomEncryptionKeyHex.size());
        auto newEncryptionKey = std::make_shared<odhtdb::OwnedByteArray>(new u8[odhtdb::ENCRYPTION_KEY_BYTE_SIZE], odhtdb::ENCRYPTION_KEY_BYTE_SIZE);
        memcpy(newEncryptionKey->data, roomEncryptionKeyStr.data(), roomEncryptionKeyStr.size());
        std::string inviteKeyChecksum = inviteKey.substr(128, 2);
        if(inviteKeyChecksum != getInviteKeyChecksum(inviteKey.substr(0, 128)))
            throw std::runtime_error("Invalid invite key, checksum is incorrect. Did you type the invite key incorrectly?");

        auto ourNewUser = std::make_shared<odhtdb::Signature::KeyPair>();
        sibs::SafeSerializer serializer;
        serializer.add(ourNewUser->getPublicKey().getData(), ourNewUser->getPublicKey().getSize());
        serializer.add(message.data(), message.size());
        odhtdb::DataView encryptionData { serializer.getBuffer().data(), serializer.getSize() };
        odhtdb::DataView encryptionKey { (void*)newEncryptionKey->data, newEncryptionKey->size };
        odhtdb::Encryption encryption(encryptionData, encryptionKey);

        sibs::SafeSerializer serializerFinish;
        serializerFinish.add((const u8*)encryption.getNonce().data, encryption.getNonce().size);
        serializerFinish.add((const u8*)encryption.getCipherText().data, encryption.getCipherText().size);
        odhtdb::InfoHash inviteInfoHash = odhtdb::InfoHash::generateHash((const u8*)inviteKey.data(), inviteKey.size());
        roomLocalUser[*roomId] = ourNewUser;
        roomEncryptionKey[*roomId] = newEncryptionKey;
        waitingToJoinRoom[*roomId] = ourNewUser;
        database->sendCustomMessage(inviteInfoHash, serializerFinish.getBuffer().data(), serializerFinish.getSize());
        odhtdb::DatabaseNode roomNode(newEncryptionKey, roomId);
        database->seed(roomNode);
        database->storeNodeInfoForUserEncrypted(roomNode, currentUsername, currentUserPassword, *ourNewUser);
        return true;
    }
}