#[macro_use] extern crate handlebars; #[macro_use] extern crate serde_json; use handlebars::Handlebars; use time::format_description::{parse, well_known::Rfc2822}; use time::OffsetDateTime; handlebars_helper!(lower: |s: str| s.to_lowercase()); handlebars_helper!(upper: |s: str| s.to_uppercase()); handlebars_helper!(hex: |v: i64| format!("0x{:x}", v)); handlebars_helper!(money: |v: i64, {cur: str="$"}| format!("{}{}.00", cur, v)); handlebars_helper!(all_hash: |{cur: str="$"}| cur); handlebars_helper!(nargs: |*args| args.len()); handlebars_helper!(has_a: |{a:i64 = 99}, **kwargs| format!("{}, {}", a, kwargs.get("a").is_some())); handlebars_helper!(tag: |t: str| format!("<{}>", t)); handlebars_helper!(date: |dt: OffsetDateTime| dt.format(&parse("[year]-[month]-[day]").unwrap()).unwrap()); #[test] fn test_macro_helper() { let mut hbs = Handlebars::new(); hbs.register_helper("lower", Box::new(lower)); hbs.register_helper("upper", Box::new(upper)); hbs.register_helper("hex", Box::new(hex)); hbs.register_helper("money", Box::new(money)); hbs.register_helper("nargs", Box::new(nargs)); hbs.register_helper("has_a", Box::new(has_a)); hbs.register_helper("tag", Box::new(tag)); hbs.register_helper("date", Box::new(date)); let data = json!("Teixeira"); assert_eq!( hbs.render_template("{{lower this}}", &data).unwrap(), "teixeira" ); assert_eq!( hbs.render_template("{{upper this}}", &data).unwrap(), "TEIXEIRA" ); assert_eq!(hbs.render_template("{{hex 16}}", &()).unwrap(), "0x10"); assert_eq!( hbs.render_template("{{money 5000}}", &()).unwrap(), "$5000.00" ); assert_eq!( hbs.render_template("{{money 5000 cur=\"£\"}}", &()) .unwrap(), "£5000.00" ); assert_eq!( hbs.render_template("{{nargs 1 1 1 1 1}}", &()).unwrap(), "5" ); assert_eq!(hbs.render_template("{{nargs}}", &()).unwrap(), "0"); assert_eq!( hbs.render_template("{{has_a a=1 b=2}}", &()).unwrap(), "1, true" ); assert_eq!( hbs.render_template("{{has_a x=1 b=2}}", &()).unwrap(), "99, false" ); assert_eq!( hbs.render_template("{{tag \"html\"}}", &()).unwrap(), "<html>" ); assert_eq!( hbs.render_template("{{{tag \"html\"}}}", &()).unwrap(), "" ); assert_eq!( hbs.render_template( "{{date this}}", &OffsetDateTime::parse("Wed, 18 Feb 2015 23:16:09 GMT", &Rfc2822).unwrap() ) .unwrap(), "2015-02-18" ); }