Lakona.Game.Client 0.4.12

Lakona.Game.Client

Lakona.Game.Client contains reusable engine-neutral Game client primitives. Generated game projects use a project-specific Client.Generated.LakonaGameClient as the public entry point. The fixed package type is LakonaGameClientCore, which owns framework handshake state, reliable push state, heartbeat state, and session snapshots.

The library does not depend on Unity, Godot, or any transport package. Game clients remain responsible for choosing their transport, dispatching callbacks onto the engine main thread, and applying business-specific payloads.

Generated Client Entry Point

Generated game projects should use their generated wrapper as the single connection entry point:

using System;
using Client.Generated;
using Lakona.Game.Client;
using Shared.Contracts.Game;

var options = new LakonaGameClientOptions(transport, serializer)
{
};

await using var gameClient = new LakonaGameClient(options, callbackReceiver);
await gameClient.ConnectAsync(cancellationToken);

var game = gameClient.Api.Shared.Game;
var reply = await game.LoginAsync(new LoginRequest { PlayerName = name });
if (!reply.Success)
    throw new InvalidOperationException(reply.Error);

var world = reply.World;

ConnectAsync owns the framework handshake and heartbeat startup. Normal generated clients learn the active framework Session through the server's acknowledged establishment notification; reliable push replay and acknowledgements remain framework protocol details. A successful business call that establishes a Session does not return until the generated client has applied and acknowledged that framework state. Business contracts do not expose Session ids, and application code does not call StartSessionAsync after login. Business RPC services are exposed through gameClient.Api.

Core Client Primitive

Use LakonaGameClientCore directly only when you are building a custom client wrapper instead of using generated Client.Generated.LakonaGameClient.

The core primitive owns framework handshake state, heartbeat state, reliable push client state, opaque resume tickets, and connection snapshots. Platform, game version, build id, runtime, and capability metadata remain application concerns. Generated wrappers expose business services through gameClient.Api.

A custom wrapper must register the reserved Session-establishment notification, pass its GameSessionEstablished payload to ApplyGameSessionEstablishedAsync, and send the reserved acknowledgement. Calling StartSessionAsync alone is not a substitute: it does not apply the opaque resume ticket or acknowledge establishment to the server.

Construct LakonaGameClientOptions with Func<ITransport> for automatic recovery. The wrapper creates a fresh transport per connection generation while application-held API/service proxies remain stable. Business code does not save session ids or call login again during a transient disconnect.

Normal clients should not call reliable-push ack RPCs. The generated wrapper uses the framework protocol negotiated by handshake. If the server disables reliable push, the wrapper keeps the same public callback path and treats notifications as immediate best-effort delivery.

Engine-neutral session state

ClientSessionController is a pure state helper. Unity, Godot, and plain .NET clients can render their own UI from the snapshot without the framework touching engine APIs or dispatchers.

using Lakona.Game.Client.Sessions;

var controller = new ClientSessionController();
controller.StartSession(sessionId);
controller.MarkReconnecting();

if (controller.Snapshot.Phase == ClientSessionPhase.Reconnecting)
{
    // Render reconnecting UI until the generated client wrapper reports ready again.
}