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use syn::*;

/// Extract a path from marker `#[frb(mirror(path), ..)]`
pub fn extract_mirror_marker(attrs: &[Attribute]) -> Vec<Path> {
    let mut paths = vec![];
    attrs
        .iter()
        .filter(|attr| attr.path().is_ident("frb"))
        .for_each(|attr| {
            let _ = attr.parse_nested_meta(|meta| {
                if meta.path.is_ident("mirror") {
                    meta.parse_nested_meta(|path| {
                        paths.push(path.path);
                        Ok(())
                    })
                    .unwrap();
                }
                Ok(())
            });
        });
    paths
}

/// Checks if the `#[frb(non_final)]` attribute is present.
pub fn has_non_final(attrs: &[Attribute]) -> bool {
    attrs
        .iter()
        .filter(|attr| attr.path().is_ident("frb"))
        .any(|attr| {
            let mut flag = false;
            let _ = attr.parse_nested_meta(|arg| {
                if arg.path.is_ident("non_final") {
                    flag = true;
                }
                Ok(())
            });
            flag
        })
}