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use crate::*;
use std::collections::BTreeMap;
use std::convert::TryFrom;
use std::sync::Arc;
#[derive(Debug, Clone, Default)]
pub struct Template(Arc<Node>);
impl Template {
pub fn render(&self, ctx: &impl Context) -> Result<String> {
self.0.render(ctx)
}
pub fn exec(&self, ctx: &impl Context) -> Result<Document> {
self.0.exec(ctx).into_result()
}
pub(crate) fn root_node(&self) -> Arc<Node> {
self.0.clone()
}
}
#[derive(Debug, Clone)]
pub enum TemplateTree {
Template(Template),
Mapping(Arc<BTreeMap<Document, TemplateTree>>),
Sequence(Arc<Vec<TemplateTree>>),
}
impl Default for TemplateTree {
fn default() -> Self {
TemplateTree::Template(Default::default())
}
}
impl TemplateTree {
pub fn get(&self, key: &Document) -> Option<TemplateTree> {
match self {
TemplateTree::Mapping(v) => Some(v[key].clone()),
_ => None,
}
}
pub fn get_path<T: Into<Document> + Clone>(&self, path: &[T]) -> Option<TemplateTree> {
let mut result = self.clone();
for key in path.iter() {
result = result.get(&key.clone().into())?;
}
Some(result)
}
pub fn get_index(&self, index: usize) -> Option<TemplateTree> {
match self {
TemplateTree::Sequence(v) => Some(v.get(index).cloned().unwrap_or_default()),
_ => None,
}
}
}
impl From<Node> for Template {
fn from(n: Node) -> Template {
Template(Arc::new(n))
}
}
impl From<Template> for TemplateTree {
fn from(t: Template) -> TemplateTree {
TemplateTree::Template(t)
}
}
impl TryFrom<TemplateTree> for Template {
type Error = TemplarError;
fn try_from(value: TemplateTree) -> Result<Self> {
match value {
TemplateTree::Template(t) => Ok(t),
_ => Err(TemplarError::ParseFailure("Not a template node".into())),
}
}
}
impl TryFrom<Option<TemplateTree>> for Template {
type Error = TemplarError;
fn try_from(value: Option<TemplateTree>) -> Result<Self> {
match value {
Some(TemplateTree::Template(t)) => Ok(t),
_ => Err(TemplarError::ParseFailure("Not a template node".into())),
}
}
}