Annotation on fields
Annotation has param to not generate callbacks eg if we want to handle that manually but still label a field as synchronized
Annotation will have a parameter that specifies a class which the corresponding field is in. Ie server field will have param pointing to client file

Callback object to handle initial sync packet
Specifically, a callback for sending the data and one for receiving the data, each for client and server
All four callback skeletons are generated for each field annotated

A fifth function is generated to attach the callbacks to a given entity, this is used to enforce it being properly attached every time

A getter and setter are each generated
The setter has logic that will distribute the new value every time it is called, alternatively a parameter on the Annotation can throttle how often the value is updated
Use engine specific functions within setter to actually send packet
Because the logic to send packet is different on server and client, will need to annotate behaviortree with either server or client annotation
Should have validation in cli that verifies the field is never manually set outside the setter


Service with map of entity to list of callbacks to synchronize
The service is generated in a folder specified by a json config
Service receives packets with its given packet category each frame
These packets contain entity ID, field id, and new value
Loops through all packets at start of frame and sets values on entities accordingly


When a scene is being synchronized, loop through every entity in the scene cross referencing the service and firing callbacks to generate packets
Callback job is to grab current value and send over net
Attribute data could theoretically change if changing things like player hair are implemented, so that should be stored as dynamic data



For non entity fields (think weather status of a region, number of players logged in, etc), the flow works mostly the same
Annotation still has a link to related client field
Callbacks still generated
When value is set, call chunk independent function to submit packet
When packets are being looped through, there's a different class of packet that has field id and value, but no entity ID





Cases to consider
A chat log
A character playing an instrument
Creating a particle
Playing a sound
Creating an effect generally (ie fire)
Creating a speech bubble over a character
Playing an animation
Writing a book on the client side
Fetching book contents from server(lazy load?)







Generally want synchronized fields as well at the ability to call a function on server and client simultaneously (ie 'create fire here')