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use std::fmt;
use std::sync;
use liquid_compiler;
use liquid_compiler::Language;
use liquid_error::Result;
use liquid_interpreter;
use liquid_interpreter::PartialStore;
use liquid_interpreter::Renderable;
use super::PartialCompiler;
use super::PartialSource;
#[derive(Debug)]
pub struct OnDemandCompiler<S: PartialSource> {
source: S,
}
impl<S> OnDemandCompiler<S>
where
S: PartialSource,
{
pub fn new(source: S) -> Self {
OnDemandCompiler { source }
}
}
impl<S> OnDemandCompiler<S>
where
S: PartialSource + Default,
{
pub fn empty() -> Self {
Default::default()
}
}
impl<S> Default for OnDemandCompiler<S>
where
S: PartialSource + Default,
{
fn default() -> Self {
Self {
source: Default::default(),
}
}
}
impl<S> ::std::ops::Deref for OnDemandCompiler<S>
where
S: PartialSource,
{
type Target = S;
fn deref(&self) -> &S {
&self.source
}
}
impl<S> ::std::ops::DerefMut for OnDemandCompiler<S>
where
S: PartialSource,
{
fn deref_mut(&mut self) -> &mut S {
&mut self.source
}
}
impl<S> PartialCompiler for OnDemandCompiler<S>
where
S: PartialSource + Send + Sync + 'static,
{
fn compile(self, language: sync::Arc<Language>) -> Result<Box<PartialStore + Send + Sync>> {
let store = OnDemandStore {
language,
source: self.source,
};
Ok(Box::new(store))
}
}
struct OnDemandStore<S: PartialSource> {
language: sync::Arc<Language>,
source: S,
}
impl<S> PartialStore for OnDemandStore<S>
where
S: PartialSource,
{
fn contains(&self, name: &str) -> bool {
self.source.contains(name)
}
fn names(&self) -> Vec<&str> {
self.source.names()
}
fn try_get(&self, name: &str) -> Option<sync::Arc<Renderable>> {
let s = self.source.try_get(name)?;
let s = s.as_ref();
let template = liquid_compiler::parse(s, &self.language)
.map(liquid_interpreter::Template::new)
.map(sync::Arc::new)
.ok()?;
Some(template)
}
fn get(&self, name: &str) -> Result<sync::Arc<Renderable>> {
let s = self.source.get(name)?;
let s = s.as_ref();
let template = liquid_compiler::parse(s, &self.language)
.map(liquid_interpreter::Template::new)
.map(sync::Arc::new)?;
Ok(template)
}
}
impl<S> fmt::Debug for OnDemandStore<S>
where
S: PartialSource,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.source.fmt(f)
}
}