rocket_dyn_templates/engine/
handlebars.rs

1use std::path::Path;
2
3use handlebars::Handlebars;
4use rocket::serde::Serialize;
5
6use crate::engine::Engine;
7
8impl Engine for Handlebars<'static> {
9    const EXT: &'static str = "hbs";
10
11    fn init<'a>(templates: impl Iterator<Item = (&'a str, &'a Path)>) -> Option<Self> {
12        let mut hb = Handlebars::new();
13        let mut ok = true;
14        for (template, path) in templates {
15            if let Err(e) = hb.register_template_file(template, path) {
16                error!(template, path = %path.display(),
17                    "failed to register Handlebars template: {e}");
18
19                ok = false;
20            }
21        }
22
23        ok.then_some(hb)
24    }
25
26    fn render<C: Serialize>(&self, template: &str, context: C) -> Option<String> {
27        if self.get_template(template).is_none() {
28            error!(template, "requested Handlebars template does not exist.");
29            return None;
30        }
31
32        Handlebars::render(self, template, &context)
33            .map_err(|e| error!("Handlebars render error: {}", e))
34            .ok()
35    }
36}