GNOM/presence: informations for distant network objects

[Override-6]

Current informations only let the user know if a network object is stored on an engine id with the requested reference.

NetworkPresencesHandlers should be able to provide this kind of infroamtion to the user :

• the object's type
• the object itself (if allowed)
• the object hashcode
• the object class's checksum
• is the distant object the same (class, hashcode, type, etc or equals) as this object for all engines (or one engine, or a list...)

Example

val linker = network.getGeneralNetworkObjectLinker
val presence = linker.getPresence(PacketTraffic / 0 / 7 / 5)
val friend = "Engine01Identifier" //the engine's identifier we want to extract informations
val isPresent = presence.isPresentOnEngine(friend) //true if the engine has opened any packet channel at 0/7/5
if (isPresent && presence.sameClass[MessagePacketChannel])) {
     //we are now sure that the engine have opened a MessagePacketChannel that we can use directly and use to send a message
      val channel = traffic.getInjectable(MessagePacketChannel, ChannelScopes.retains(friend))
      channel.sendMessage("Hello, Friend !")
}