use yaserde::YaSerialize;

pub fn to_xml_str<T: YaSerialize>(model: &T) -> Result<String, String> {
    let yaserde_cfg = yaserde::ser::Config {
        perform_indent: true,
        write_document_declaration: false,
        pad_self_closing: false,
        ..Default::default()
    };
    let serialized = yaserde::ser::to_string_with_config::<T>(model, &yaserde_cfg)?;

    // Opnsense does not specify encoding in the document declaration
    //
    // yaserde / xml-rs does not allow disabling the encoding attribute in the
    // document declaration
    //
    // So here we just manually prefix the xml document with the exact document declaration
    // that opnsense uses
    Ok(format!("<?xml version=\"1.0\"?>\n{serialized}\n"))
}