PkgInst

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using System.Collections.Concurrent;
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using System.Diagnostics;
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using System.Reflection;
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namespace PkgInst.Benchmark;
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public class PackageHelper
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{
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    private readonly string _basePath;
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    private readonly string _appPath;
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    public PackageHelper(string basePath)
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    {
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        _basePath = basePath;
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        _appPath = Path.GetDirectoryName(Assembly.GetEntryAssembly()?.Location) ?? throw new DirectoryNotFoundException();
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    }
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    public IEnumerable<Package> GetPackages()
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    {
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        var list = new List<Package>();
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        foreach (var packageId in new DirectoryInfo(_basePath).GetDirectories().Select(x => x.Name))
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        {
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            var packageInfo = GetPackageInfo(packageId);
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            var fileInfo = new FileInfo(Path.Combine(_basePath, packageId, "installer.exe"));
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            string name = packageInfo.Item1;
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            string url = $"/download?id={packageId}&name={name}";
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            long size = fileInfo.Length;
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            DateTime dateTimeCreated = fileInfo.LastWriteTime;
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            string parameters = packageInfo.Item2;
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            list.Add(new Package(packageId, name, url, size, dateTimeCreated, parameters));
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        }
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        return list;
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    }
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    public IEnumerable<Package> GetPackagesInParallel()
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    {
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        var list = new ConcurrentBag<Package>();
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        Parallel.ForEach(new DirectoryInfo(_basePath).GetDirectories().Select(x => x.Name), packageId =>
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        {
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            var packageInfo = GetPackageInfo(packageId);
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            var fileInfo = new FileInfo(Path.Combine(_basePath, packageId, "installer.exe"));
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            string name = packageInfo.Item1;
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            string url = $"/download?id={packageId}&name={name}";
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            long size = fileInfo.Length;
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            DateTime dateTimeCreated = fileInfo.LastWriteTime;
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            string parameters = packageInfo.Item2;
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            list.Add(new Package(packageId, name, url, size, dateTimeCreated, parameters));
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        });
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        return list;
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    }
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    public (string, string) GetPackageInfo(string packageId)
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    {
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        string tempPath = ExtractPackage(packageId, Path.Combine("pkg_1", "executable_package.kpd"));
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        string[] lines = File.ReadAllLines(Path.Combine(tempPath, "executable_package.kpd"));
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        string name = lines.FirstOrDefault(x => x.StartsWith("LocalizedName="))!.Split('=')[1];
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        string parameters = string.Join('=', lines.FirstOrDefault(x => x.StartsWith("Params="))!.Split('=').Skip(1));
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        Directory.Delete(tempPath, true);
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        return (string.IsNullOrWhiteSpace(name) ? "installer.exe" : name, parameters);
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    }
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    public string ExtractPackage(string packageId, string nameToExtract)
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    {
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        string packagePath = Path.Combine(_basePath, packageId, "installer.exe");
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        string guid = Guid.NewGuid().ToString();
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        string tempPath = Path.Combine(_appPath, "temp", guid);
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        var processInfo = new ProcessStartInfo
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        {
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            FileName = "7za",
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            Arguments = $"e \"{packagePath}\" -aoa -o\"{tempPath}\" \"{nameToExtract}\"",
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            WindowStyle = ProcessWindowStyle.Hidden
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        };
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        var process = Process.Start(processInfo);
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        process?.WaitForExit();
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        return tempPath;
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    }
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}
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