ByondInstallerBase.cs

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using System;
using System.Globalization;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
 
using Microsoft.Extensions.Logging;
 
using Tgstation.Server.Host.IO;
 
namespace Tgstation.Server.Host.Components.Byond
{
    abstract class ByondInstallerBase : IByondInstaller
    {
        const string CacheDirectoryName = "cache";
 
        public abstract string DreamMakerName { get; }
 
        public abstract string PathToUserByondFolder { get; }
 
        protected abstract string ByondRevisionsUrlTemplate { get; }
 
        protected IIOManager IOManager { get; }
 
        protected ILogger<ByondInstallerBase> Logger { get; }
 
        readonly IFileDownloader fileDownloader;
 
        protected ByondInstallerBase(IIOManager ioManager, IFileDownloader fileDownloader, ILogger<ByondInstallerBase> logger)
        {
            IOManager = ioManager ?? throw new ArgumentNullException(nameof(ioManager));
            this.fileDownloader = fileDownloader ?? throw new ArgumentNullException(nameof(fileDownloader));
            Logger = logger ?? throw new ArgumentNullException(nameof(logger));
        }
 
        public abstract string GetDreamDaemonName(Version version, out bool supportsCli);
 
        public async Task CleanCache(CancellationToken cancellationToken)
        {
            try
            {
                Logger.LogDebug("Cleaning BYOND cache...");
                await IOManager.DeleteDirectory(
                    IOManager.ConcatPath(
                        PathToUserByondFolder,
                        CacheDirectoryName),
                    cancellationToken);
            }
            catch (OperationCanceledException)
            {
                throw;
            }
            catch (Exception e)
            {
                Logger.LogWarning(e, "Error deleting BYOND cache!");
            }
        }
 
        public abstract Task InstallByond(Version version, string path, CancellationToken cancellationToken);
 
        public abstract Task UpgradeInstallation(Version version, string path, CancellationToken cancellationToken);
 
        public async Task<MemoryStream> DownloadVersion(Version version, CancellationToken cancellationToken)
        {
            ArgumentNullException.ThrowIfNull(version);
 
            Logger.LogTrace("Downloading BYOND version {major}.{minor}...", version.Major, version.Minor);
            var url = String.Format(CultureInfo.InvariantCulture, ByondRevisionsUrlTemplate, version.Major, version.Minor);
 
            await using var download = fileDownloader.DownloadFile(new Uri(url), null);
            await using var buffer = new BufferedFileStreamProvider(
                await download.GetResult(cancellationToken));
            return await buffer.GetOwnedResult(cancellationToken);
        }
    }
}