rocket_dyn_templates/engine/
tera.rsuse std::path::Path;
use std::error::Error;
use tera::{Context, Tera};
use rocket::serde::Serialize;
use crate::engine::Engine;
impl Engine for Tera {
const EXT: &'static str = "tera";
fn init<'a>(templates: impl Iterator<Item = (&'a str, &'a Path)>) -> Option<Self> {
let mut tera = Tera::default();
let ext = [".html.tera", ".htm.tera", ".xml.tera", ".html", ".htm", ".xml"];
tera.autoescape_on(ext.to_vec());
let files = templates.map(|(name, path)| (path, Some(name)));
if let Err(e) = tera.add_template_files(files) {
span_error!("templating", "Tera templating initialization failed" => {
let mut error = Some(&e as &dyn Error);
while let Some(err) = error {
error!("{err}");
error = err.source();
}
});
None
} else {
Some(tera)
}
}
fn render<C: Serialize>(&self, template: &str, context: C) -> Option<String> {
if self.get_template(template).is_err() {
error!(template, "requested template does not exist");
return None;
};
let tera_ctx = Context::from_serialize(context)
.map_err(|e| error!("Tera context error: {}.", e))
.ok()?;
match Tera::render(self, template, &tera_ctx) {
Ok(string) => Some(string),
Err(e) => {
span_error!("templating", template, "failed to render Tera template" => {
let mut error = Some(&e as &dyn Error);
while let Some(err) = error {
error!("{err}");
error = err.source();
}
});
None
}
}
}
}