How to set data for a member of a lobby to transfer from lobby participant to host (eg ready status)?
Modifying session settings and adding a setting with Advertisement Via Online Service parameter.
bool UECRGameInstance::SetPartyMemberData(FString Key, FString Value, bool bForClient)
{
if (OnlineSubsystem)
{
if (const IOnlineIdentityPtr Identity = OnlineSubsystem->GetIdentityInterface())
{
if (IOnlineSessionPtr SessionInterface = OnlineSubsystem->GetSessionInterface())
{
// Get the current session settings
FOnlineSessionSettings* OnlineSessionSettings = SessionInterface->GetSessionSettings(
bForClient ? PARTY_LOBBY_CLIENT_SESSION_NAME : PARTY_LOBBY_SESSION_NAME);
if (OnlineSessionSettings)
{
// Get the player ID
FUniqueNetIdRef PlayerId = Identity->GetUniquePlayerId(0)->AsShared();
// Modify MemberSettings
FSessionSettings& Tuples = OnlineSessionSettings->MemberSettings.FindOrAdd(PlayerId);
FOnlineSessionSetting Setting = {Value, EOnlineDataAdvertisementType::ViaOnlineService};
Tuples.Add(FName{Key}, Setting);
// Update the session with modified settings
SessionInterface->UpdateSession(
bForClient ? PARTY_LOBBY_CLIENT_SESSION_NAME : PARTY_LOBBY_SESSION_NAME,
*OnlineSessionSettings, true);
return true;
}
}
}
}
return false;
}
Note that in Epic Online Subsystem 5.1, 5.2 it may be broken because of the code of update lobby session function, which tries not only to set member data on client, but also lobby parameters, which host only can set, which leads to an error.
Also even in 5.4 getting member params will probably not work due to wrong parameters:
Since missing line
AttrOptions.TargetUserId = TargetUserId;