ShowCommand.cs

using System;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using Seq.Api.Model;
using Seq.Api.Model.License;
using SeqCli.Cli.Features;
using SeqCli.Config;
using SeqCli.Connection;
using SeqCli.Util;
using Serilog;

// ReSharper disable once UnusedType.Global

namespace SeqCli.Cli.Commands.License;

[Command("license", "show", "Shows license applied to the Seq server",
    Example = "seqcli license show")]
class ShowCommand : Command
{
    readonly SeqConnectionFactory _connectionFactory;
    readonly ConnectionFeature _connection;
    readonly OutputFormatFeature _output;

    public ShowCommand(SeqConnectionFactory connectionFactory, SeqCliConfig config)
    {
        _connectionFactory = connectionFactory ?? throw new ArgumentNullException(nameof(connectionFactory));
        _connection = Enable<ConnectionFeature>();
        _output = Enable(new OutputFormatFeature(config.Output));
    }

    protected override async Task<int> Run()
    {
        var connection = _connectionFactory.Connect(_connection);
        var license = await connection.Licenses.FindCurrentAsync();

        if (license == null)
        {
            Log.Warning("No license is currently applied to the server.");
            return 2;
        }

        _output.WriteEntity(_output.Json ? license : new OutputWrapperLicenseEntity(license));

        return 0;
    }

    /// <summary>
    /// Wraps the license entity for none json output.
    /// </summary>
    class OutputWrapperLicenseEntity : Entity
    {
        public OutputWrapperLicenseEntity(LicenseEntity license)
        {
            this.Id = license.LicenseText;
        }
    }
}