internal static ProgramStateModel InitializeProgramState(ProgramStateModel.ProgramModeType mode, FileInfo sourceFile, FileInfo targetFile)
{
if (!sourceFile.Exists)
{
throw new ArgumentNullException("Source file does not exists");
}
return(ProgramStateModel.Of(sourceFile, targetFile, mode));
}
internal static ProgramStateModel OpenStreams(this ProgramStateModel model) => FileReader.OpenFiles(model);
internal static Result <ExitCode> ProcessFilesOperation(this ProgramStateModel model)
{
using var worker = model switch
{
{ ProgramMode : ProgramStateModel.ProgramModeType.Compress, InputOutputStreams : var(inputStream, outputStream) }
