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use std::collections::BTreeMap;
use femstache_parser::nodes::Document;
use crate::{
env::TemplateEnv,
error::{EvalResult, ParseResult},
input::TemplateInput,
output::Output,
renderer::TemplateRenderer,
};
/// A compiled template
#[derive(Debug, Clone)]
pub struct Template {
pub(crate) doc: Document,
}
impl Template {
/// Parse a template from a string
///
/// ```rust
/// # use femstache::Template;
/// Template::parse("hello {{place}}! :3").unwrap();
/// ```
pub fn parse(source: impl AsRef<str>) -> ParseResult<Template> {
let root = femstache_parser::parse(source.as_ref())?;
Ok(Template { doc: root })
}
/// Render a template using the specified input
///
/// ```rust
/// # use std::collections::BTreeMap;
/// # use femstache::Template;
/// let tpl = Template::parse("hello, {{place}}! :3c").unwrap();
///
/// let mut map = BTreeMap::new();
/// map.insert("place", "delicious world");
///
/// assert_eq!(tpl.render(&map).unwrap(), "hello, delicious world! :3c");
/// ```
pub fn render(&self, inputs: &impl TemplateInput) -> EvalResult<String> {
let env = TemplateEnv::new(inputs);
// TODO: it should be possible to set this
let blocks = BTreeMap::new();
let mut renderer = TemplateRenderer::new(env, blocks, None);
let mut output = Output::String(String::new());
renderer.render_document(&self.doc, &mut output)?;
Ok(output.into_inner())
}
}