Snowflake/RPG.Services.Core/Extensions/HostApplicationBuilderExtensions.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using RPG.Services.Core.Network;
using RPG.Services.Core.Network.Command;
using RPG.Services.Core.Options;
using RPG.Services.Core.Session;

namespace RPG.Services.Core.Extensions;
public static class HostApplicationBuilderExtensions
{
    public static IHostApplicationBuilder SetupRPGService<TService, TCommandHandler>(this IHostApplicationBuilder builder, bool stateless = false) 
        where TService : RPGServiceBase
        where TCommandHandler : ServiceCommandHandler
    {
        IConfigurationSection serviceOptionsSection = builder.Configuration.GetRequiredSection("Service");
        IConfigurationSection serviceNodesSection = builder.Configuration.GetRequiredSection("Nodes");

        builder.Services.Configure<RPGServiceOptions>(serviceOptionsSection)
                        .Configure<ServiceNodeOptions>(serviceNodesSection);

        builder.Services.AddHostedService<TService>()
                        .AddSingleton<ServiceManager>()
                        .AddSingleton<ServiceBox>()
                        .AddSingleton<ServiceCommandHandler, TCommandHandler>();

        if (!stateless) builder.Services.AddSingleton<SessionManager>();

        return builder;
    }
}