mod list;
mod unpack;
mod version;
pub use {list::list, unpack::unpack, version::version};

fn load_pak(
    path: String,
    key: Option<String>,
) -> Result<unpak::PakReader<std::io::BufReader<std::fs::File>>, unpak::Error> {
    use aes::cipher::KeyInit;
    use base64::{engine::general_purpose, Engine as _};
    let key = key
        .map(|k| {
            general_purpose::STANDARD
                .decode(k)
                .as_ref()
                .map_err(|_| unpak::Error::Base64)
                .and_then(|bytes| {
                    aes::Aes256Dec::new_from_slice(bytes).map_err(|_| unpak::Error::Aes)
                })
        })
        .transpose()?;

    unpak::PakReader::new_any( std::io::BufReader::new(std::fs::OpenOptions::new().read(true).open(&path)?), key)
}