internal void Initialize(IHostAppUser hostAppUser, Guid userId, Guid ephemeralUserId, MixedRealityExtensionApp app)
{
HostAppUser = hostAppUser;
Name = HostAppUser.Name;
base.Initialize(userId, app);
EphemeralUserId = ephemeralUserId;
}
private Guid GenerateObfuscatedUserId(IHostAppUser hostAppUser, string salt)
{
using (SHA256 hasher = SHA256.Create())
{
string hashString = $"{hostAppUser.HostUserId}:{salt}";
var encoder = new UTF8Encoding();
var hashedId = Convert.ToBase64String(
hasher.ComputeHash(encoder.GetBytes(hashString))
);
return(UtilMethodsGodot.StringToGuid(hashedId));
}
}
/// <inheritdoc />
public void UserJoin(Node userNode, IHostAppUser hostAppUser, bool isLocalUser)
{
void PerformUserJoin()
{
// only join the user if required
if (isLocalUser &&
!GrantedPermissions.HasFlag(Permissions.UserInteraction) &&
!GrantedPermissions.HasFlag(Permissions.UserTracking))
{
return;
}
var user = userNode.GetChildren <User>()
.FirstOrDefault(_user => _user.AppInstanceId == this.InstanceId);
if (user == null)
{
user = new User();
userNode.AddChild(user);
// Generate the obfuscated user ID based on user tracking permission.
Guid instancedUserId = GenerateObfuscatedUserId(hostAppUser, EphemeralAppId);
Guid userId = instancedUserId;
if ((!isLocalUser || GrantedPermissions.HasFlag(Permissions.UserTracking)) && !string.IsNullOrEmpty(GlobalAppId))
{
userId = GenerateObfuscatedUserId(hostAppUser, GlobalAppId);
}
user.Initialize(hostAppUser, userId, instancedUserId, this);
}
// TODO @tombu - Wait for the app to send back a success for join?
_userManager.AddUser(user);
if (isLocalUser)
{
Protocol.Send(new UserJoined()
{
User = new UserPatch(user)
});
LocalUser = user;
PhysicsBridge.LocalUserId = LocalUser.Id;
// Enable interactions for the user if given the UserInteraction permission.
if (GrantedPermissions.HasFlag(Permissions.UserInteraction))
{
EnableUserInteraction(user);
}
}
try
{
OnUserJoined?.Invoke(user, isLocalUser);
}
catch (Exception e)
{
GD.PushError(e.ToString());
}
}
if (Protocol is Execution)
{
PerformUserJoin();
}
else
{
_executionProtocolActionQueue.Add(() => PerformUserJoin());
}
}
