XBOX の要件

PartyString networkCreatorEntityId;
RETURN_VOID_IF_FAILED(m_localPartyUser->GetEntityId(&networkCreatorEntityId));

PartyInvitationConfiguration newNetworkInitialInvite{};
newNetworkInitialInvite.identifier = nullptr; // let Party select the invitation identifier for simplicity
newNetworkInitialInvite.revocability = PartyInvitationRevocability::Anyone; // the initial invitation must be revocable by anyone

// this initial invitation only allows the original xbl user creating the network
newNetworkInitialInvite.entityIdCount = 1;
newNetworkInitialInvite.entityIds = &networkCreatorEntityId;

PartyError error = PartyManager::GetSingleton().CreateNewNetwork(
    m_localPartyUser,
    &networkConfiguration,
    0,
    nullptr,
    &newNetworkInitialInvite,
    nullptr,
    nullptr,
    nullptr);

void
OnSessionDocumentUpdated(
    PartyNetwork* network,
    uint32_t usersInDocumentCount,
    const uint64_t* usersInDocument
    )
{
    PartyInvitationConfiguration newInvite{};
    newInvite.identifier = nullptr; // let Party select the invitation identifier for simplicity
    newInvite.revocability = PartyInvitationRevocability::Creator; // must be revocable by the creator only

    // the updated invite should contain all users currently in the document
    std::vector<PartyString> entityIdsInDocument;
    for (uint32_t i = 0; i < usersInDocumentCount; ++i)
    {
        uint64_t xboxUserId = usersInDocument[i];
        // Call title-defined xuid->entityid mapping helper
        PartyString xboxUserEntityId = GetEntityIdFromXboxUserId(xboxUserId);
        if (xboxUserEntityId != nullptr)
        {
            entityIdsInDocument.push_back(xboxUserEntityId);
        }
        else
        {
            DEBUGLOG("User %llu did not have a matching entity ID.", xboxUserId);
        }
    }
    newInvite.entityIdCount = entityIdsInDocument.size();
    newInvite.entityIds = entityIdsInDocument.data();

    // Create a new invitation which includes all of the users currently in the document
    PartyInvitation* newInvitation;
    PartyError error = network->CreateInvitation(
        m_localUser,
        &newInvite,
        nullptr,
        &newInvitation);
    if (PARTY_FAILED(error))
    {
        DEBUGLOG("PartyNetwork(0x%p)::CreateInvitation failed! (error=0x%x)", network, error);
        return;
    }

    // Post the invitation's id somewhere that it can be seen by anyone trying to join/rejoin
    PostInvitationToMPSD(newInvite);

    // Cleanup previous invitations. This isn't strictly necessary, but is a good practice.
    uint32_t invitationCount;
    PartyInvitationArray invitations;
    error = network->GetInvitations(&invitationCount, &invitations);
    if (PARTY_FAILED(error))
    {
        DEBUGLOG("PartyNetwork(0x%p)::GetInvitations failed! (error=0x%x)", network, error);
        return;
    }

    for (uint32_t i = 0; i < invitationCount; ++i)
    {
        if (invitations[i] == newInvite)
        {
            continue; // don't prune the old invitation
        }

        PartyInvitation* oldInvitation = invitations[i];

        error = network->RevokeInvitation(m_localUser, oldInvitation, nullptr);
        if (PARTY_FAILED(error))
        {
            DEBUGLOG("PartyNetwork(0x%p)::RevokeInvitation failed! (err=0x%x)", network, error);
        }
    }
}