Hastlayer-SDK

using System;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Reflection;

namespace Hast.Common.Services;

public class AppDataFolder : IAppDataFolder
{
    private readonly DirectoryInfo _appDataFolder;

    private static string _assemblyDirectory;

    [SuppressMessage(
        "Major Code Smell",
        "S3902:\"Assembly.GetExecutingAssembly\" should not be called",
        Justification = "As this is a library, the actual executing assembly is not known at build time.")]
    public static string AssemblyDirectory
    {
        get
        {
            if (_assemblyDirectory == null)
            {
                var location = Assembly.GetExecutingAssembly().Location;
                if (!location.StartsWithOrdinal("file://")) location = $"file://{location}";
                var uri = new UriBuilder(location);
                var path = Uri.UnescapeDataString(uri.Path);
                _assemblyDirectory = Path.GetDirectoryName(path);
            }

            return _assemblyDirectory;
        }
    }

    public AppDataFolder(string appDataFolderPath)
    {
        if (string.IsNullOrEmpty(appDataFolderPath))
        {
            appDataFolderPath = Path.Combine(AssemblyDirectory, "App_Data");
        }

        _appDataFolder = new DirectoryInfo(appDataFolderPath);
        if (!_appDataFolder.Exists) _appDataFolder.Create();
    }

    public string MapPath(string relativePath) => Path.Combine(_appDataFolder.FullName, relativePath);

    public string Combine(params string[] parts) => MapPath(Path.Combine(parts));

    public bool FileExists(string fileName) => File.Exists(MapPath(fileName));

    public FileStream CreateFile(string fileName)
    {
        var directoryName = Path.GetDirectoryName(fileName);
        if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);
        return File.Create(MapPath(fileName));
    }

    public FileStream OpenFile(string fileName) => File.OpenRead(MapPath(fileName));

    public void DeleteFile(string fileName)
    {
        if (File.Exists(fileName)) File.Delete(MapPath(fileName));
    }
}