use std::collections::HashMap;
use serde_json::value::Value as Json;
use crate::context::{merge_json, Context};
use crate::error::RenderError;
use crate::json::path::Path;
use crate::output::Output;
use crate::registry::Registry;
use crate::render::{Decorator, Evaluable, RenderContext, Renderable};
use crate::template::Template;
fn render_partial<'reg: 'rc, 'rc>(
t: &'reg Template,
d: &Decorator<'reg, 'rc>,
r: &'reg Registry<'reg>,
ctx: &'rc Context,
local_rc: &mut RenderContext<'reg, 'rc>,
out: &mut dyn Output,
) -> Result<(), RenderError> {
if let Some(ref param_ctx) = d.param(0) {
if let (Some(p), Some(block)) = (param_ctx.context_path(), local_rc.block_mut()) {
*block.base_path_mut() = p.clone();
}
}
if let Some(t) = d.template() {
local_rc.set_partial("@partial-block".to_owned(), t);
}
let result = if d.hash().is_empty() {
t.render(r, ctx, local_rc, out)
} else {
let hash_ctx = d
.hash()
.iter()
.map(|(k, v)| (k, v.value()))
.collect::<HashMap<&&str, &Json>>();
let current_path = Path::current();
let partial_context =
merge_json(local_rc.evaluate2(ctx, ¤t_path)?.as_json(), &hash_ctx);
let ctx = Context::wraps(&partial_context)?;
let mut partial_rc = local_rc.new_for_block();
t.render(r, &ctx, &mut partial_rc, out)
};
local_rc.remove_partial("@partial-block");
result
}
pub fn expand_partial<'reg: 'rc, 'rc>(
d: &Decorator<'reg, 'rc>,
r: &'reg Registry<'reg>,
ctx: &'rc Context,
rc: &mut RenderContext<'reg, 'rc>,
out: &mut dyn Output,
) -> Result<(), RenderError> {
if let Some(t) = d.template() {
t.eval(r, ctx, rc)?;
}
let tname = d.name();
if rc.is_current_template(tname) {
return Err(RenderError::new("Cannot include self in >"));
}
let partial = rc.get_partial(tname);
match partial {
Some(t) => {
let mut local_rc = rc.clone();
render_partial(&t, d, r, ctx, &mut local_rc, out)?;
}
None => {
if let Some(t) = r.get_template(tname).or_else(|| d.template()) {
let mut local_rc = rc.clone();
render_partial(t, d, r, ctx, &mut local_rc, out)?;
}
}
}
Ok(())
}
#[cfg(test)]
mod test {
use crate::context::Context;
use crate::error::RenderError;
use crate::output::Output;
use crate::registry::Registry;
use crate::render::{Helper, RenderContext};
#[test]
fn test() {
let mut handlebars = Registry::new();
assert!(handlebars
.register_template_string("t0", "{{> t1}}")
.is_ok());
assert!(handlebars
.register_template_string("t1", "{{this}}")
.is_ok());
assert!(handlebars
.register_template_string("t2", "{{#> t99}}not there{{/t99}}")
.is_ok());
assert!(handlebars
.register_template_string("t3", "{{#*inline \"t31\"}}{{this}}{{/inline}}{{> t31}}")
.is_ok());
assert!(handlebars
.register_template_string(
"t4",
"{{#> t5}}{{#*inline \"nav\"}}navbar{{/inline}}{{/t5}}"
)
.is_ok());
assert!(handlebars
.register_template_string("t5", "include {{> nav}}")
.is_ok());
assert!(handlebars
.register_template_string("t6", "{{> t1 a}}")
.is_ok());
assert!(handlebars
.register_template_string(
"t7",
"{{#*inline \"t71\"}}{{a}}{{/inline}}{{> t71 a=\"world\"}}"
)
.is_ok());
assert!(handlebars.register_template_string("t8", "{{a}}").is_ok());
assert!(handlebars
.register_template_string("t9", "{{> t8 a=2}}")
.is_ok());
assert_eq!(handlebars.render("t0", &1).ok().unwrap(), "1".to_string());
assert_eq!(
handlebars.render("t2", &1).ok().unwrap(),
"not there".to_string()
);
assert_eq!(handlebars.render("t3", &1).ok().unwrap(), "1".to_string());
assert_eq!(
handlebars.render("t4", &1).ok().unwrap(),
"include navbar".to_string()
);
assert_eq!(
handlebars
.render("t6", &btreemap! {"a".to_string() => "2".to_string()})
.ok()
.unwrap(),
"2".to_string()
);
assert_eq!(
handlebars.render("t7", &1).ok().unwrap(),
"world".to_string()
);
assert_eq!(handlebars.render("t9", &1).ok().unwrap(), "2".to_string());
}
#[test]
fn test_include_partial_block() {
let t0 = "hello {{> @partial-block}}";
let t1 = "{{#> t0}}inner {{this}}{{/t0}}";
let mut handlebars = Registry::new();
assert!(handlebars.register_template_string("t0", t0).is_ok());
assert!(handlebars.register_template_string("t1", t1).is_ok());
let r0 = handlebars.render("t1", &true);
assert_eq!(r0.ok().unwrap(), "hello inner true".to_string());
}
#[test]
fn test_self_inclusion() {
let t0 = "hello {{> t1}} {{> t0}}";
let t1 = "some template";
let mut handlebars = Registry::new();
assert!(handlebars.register_template_string("t0", t0).is_ok());
assert!(handlebars.register_template_string("t1", t1).is_ok());
let r0 = handlebars.render("t0", &true);
assert!(r0.is_err());
}
#[test]
fn test_issue_143() {
let main_template = "one{{> two }}three{{> two }}";
let two_partial = "--- two ---";
let mut handlebars = Registry::new();
assert!(handlebars
.register_template_string("template", main_template)
.is_ok());
assert!(handlebars
.register_template_string("two", two_partial)
.is_ok());
let r0 = handlebars.render("template", &true);
assert_eq!(r0.ok().unwrap(), "one--- two ---three--- two ---");
}
#[test]
fn test_hash_context_outscope() {
let main_template = "In: {{> p a=2}} Out: {{a}}";
let p_partial = "{{a}}";
let mut handlebars = Registry::new();
assert!(handlebars
.register_template_string("template", main_template)
.is_ok());
assert!(handlebars.register_template_string("p", p_partial).is_ok());
let r0 = handlebars.render("template", &true);
assert_eq!(r0.ok().unwrap(), "In: 2 Out: ");
}
#[test]
fn test_partial_context_hash() {
let mut hbs = Registry::new();
hbs.register_template_string("one", "This is a test. {{> two name=\"fred\" }}")
.unwrap();
hbs.register_template_string("two", "Lets test {{name}}")
.unwrap();
assert_eq!(
"This is a test. Lets test fred",
hbs.render("one", &0).unwrap()
);
}
#[test]
fn test_partial_subexpression_context_hash() {
let mut hbs = Registry::new();
hbs.register_template_string("one", "This is a test. {{> (x @root) name=\"fred\" }}")
.unwrap();
hbs.register_template_string("two", "Lets test {{name}}")
.unwrap();
hbs.register_helper(
"x",
Box::new(
|_: &Helper<'_, '_>,
_: &Registry<'_>,
_: &Context,
_: &mut RenderContext<'_, '_>,
out: &mut dyn Output|
-> Result<(), RenderError> {
out.write("two")?;
Ok(())
},
),
);
assert_eq!(
"This is a test. Lets test fred",
hbs.render("one", &0).unwrap()
);
}
#[test]
fn test_nested_partial_scope() {
let t = "{{#*inline \"pp\"}}{{a}} {{b}}{{/inline}}{{#each c}}{{> pp a=2}}{{/each}}";
let data = json!({"c": [{"b": true}, {"b": false}]});
let mut handlebars = Registry::new();
assert!(handlebars.register_template_string("t", t).is_ok());
let r0 = handlebars.render("t", &data);
assert_eq!(r0.ok().unwrap(), "2 true2 false");
}
#[test]
fn test_up_to_partial_level() {
let outer = r#"{{>inner name="fruit:" vegetables=fruits}}"#;
let inner = "{{#each vegetables}}{{../name}} {{this}},{{/each}}";
let data = json!({ "fruits": ["carrot", "tomato"] });
let mut handlebars = Registry::new();
handlebars.register_template_string("outer", outer).unwrap();
handlebars.register_template_string("inner", inner).unwrap();
assert_eq!(
handlebars.render("outer", &data).unwrap(),
"fruit: carrot,fruit: tomato,"
);
}
}