extern crate human_format;
use handlebars::*;

#[derive(Clone, Copy)]
pub struct HumanFormatHelper;

impl HelperDef for HumanFormatHelper {
    fn call<'reg: 'rc, 'rc>(&self, h: &Helper<'reg, 'rc>, r: &'reg Handlebars<'_>, ctx: &'rc Context, rc: &mut RenderContext<'reg, 'rc>, out: &mut dyn Output) -> HelperResult {
        let param = h.param(0).and_then(|v| v.value().as_f64()).unwrap_or(0.0);

        let mut formatted = human_format::Formatter::new().format(param);
        formatted.retain(|c| !c.is_whitespace());

        out.write(formatted.to_uppercase().as_ref())?;

        Ok(())
    }
}