ServerManagementUtils/robin/Services/BuilderExtensions.cs

using System.Core.Extensions;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Nest;
using Robin.Services.Monitoring;
using Robin.Services.Persistence;
using Robin.Services.Publishing;

namespace Robin.Services;

public static class BuilderExtensions
{
    public static IHostApplicationBuilder AddRobinServices(this IHostApplicationBuilder builder)
    {
        var elasticClientOptions = builder
            .Configuration.GetSection(ElasticOptions.SectionName)
            .Get<ElasticOptions>();

        if (elasticClientOptions is null)
        {
            throw new InvalidOperationException(
                "ElasticOptions section is missing in configuration."
            );
        }

        builder.ThrowIfNull();
        builder.Services.AddHostedService<MonitoringService>();
        builder.Services.AddSingleton<IElasticClient>(
            new ElasticClient(
                new ConnectionSettings(elasticClientOptions.Uri)
                    .BasicAuthentication(
                        elasticClientOptions.Username,
                        elasticClientOptions.Password
                    )
                    .DefaultIndex(elasticClientOptions.Index)
            )
        );
        builder.Services.AddSingleton<IPublishingService, ElasticPublishingService>();
        builder.Services.AddSingleton<PositionPersistenceService>();
        return builder;
    }
}