naps2/NAPS2.Lib.Common/Paths.cs

using System.Windows.Forms;

namespace NAPS2;

public static class Paths
{
    private static readonly string ExecutablePath = Application.StartupPath;

    private static readonly string AppDataEnv = Environment.ExpandEnvironmentVariables("%APPDATA%");

    private static readonly string UserAppDataFolder = string.IsNullOrEmpty(AppDataEnv)
        ? Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)
        : AppDataEnv;
    
#if STANDALONE
        private static readonly string AppDataPath = Path.Combine(ExecutablePath, "..", "Data");
#else
    private static readonly string AppDataPath = Path.Combine(UserAppDataFolder, "NAPS2");
#endif

    private static readonly string TempPath = Path.Combine(AppDataPath, "temp");

    private static readonly string RecoveryPath = Path.Combine(AppDataPath, "recovery");

    private static readonly string ComponentsPath = Path.Combine(AppDataPath, "components");

    public static string AppData => EnsureFolderExists(AppDataPath);

    public static string Executable => EnsureFolderExists(ExecutablePath);

    public static string Temp => EnsureFolderExists(TempPath);

    public static string Recovery => EnsureFolderExists(RecoveryPath);

    public static string Components => EnsureFolderExists(ComponentsPath);

    /// <summary>
    /// Safely deletes the NAPS2 temp folder. If other NAPS2 or NAPS2.Console processes are running, the folder will be left alone.
    /// </summary>
    public static void ClearTemp()
    {
        try
        {
            if (!Directory.Exists(TempPath)) return;

            var otherNaps2Processes = Process.GetProcesses().Where(x =>
                x.ProcessName.IndexOf("NAPS2", StringComparison.OrdinalIgnoreCase) >= 0 &&
                x.Id != Process.GetCurrentProcess().Id);
            if (!otherNaps2Processes.Any())
            {
                Directory.Delete(TempPath, true);
            }
        }
        catch (Exception e)
        {
            Log.ErrorException("Error clearing temp files", e);
        }
    }

    private static string EnsureFolderExists(string folderPath)
    {
        if (!Directory.Exists(folderPath))
        {
            Directory.CreateDirectory(folderPath);
        }
        return folderPath;
    }
}