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use std::collections::HashMap;
use std::convert::Into;
use Data;
use Data::{Hash, Vector};
/// `HashBuilder` is a helper type that constructs `Data` types in a `HashMap`
#[derive(Debug)]
pub struct HashBuilder<'a> {
#[doc(hidden)]
pub data: HashMap<String, Data<'a>>,
#[doc(hidden)]
pub partials_path: &'a str,
}
impl<'a> HashBuilder<'a> {
/// Create a new `HashBuilder` instance
pub fn new() -> HashBuilder<'a> {
HashBuilder {
data: HashMap::new(),
partials_path: "",
}
}
/// Add a `Into<Data>` to the `HashBuilder`
///
/// ```rust
/// use rustache::HashBuilder;
/// use std::convert::Into;
/// let data = HashBuilder::new()
/// .insert("game", "Hearthstone: Heroes of Warcraft");
/// ```
/// ```rust
/// use rustache::{HashBuilder, VecBuilder};
/// let data = HashBuilder::new()
/// .insert("classes",
/// VecBuilder::new()
/// .push("Mage".to_string())
/// .push("Druid".to_string())
/// );
/// ```
/// ```rust
/// use rustache::HashBuilder;
/// let data = HashBuilder::new()
/// .insert("hero1",
/// HashBuilder::new()
/// .insert("first_name", "Anduin")
/// .insert("last_name", "Wrynn")
/// )
/// .insert("hero2",
/// HashBuilder::new()
/// .insert("first_name", "Jaina")
/// .insert("last_name", "Proudmoore")
/// );
/// ```
pub fn insert<K, V>(mut self, key: K, value: V) -> HashBuilder<'a>
where K: ToString,
V: Into<Data<'a>>
{
self.data.insert(key.to_string(), value.into());
self
}
/// Add a `Lambda` that accepts a String and returns a String to the `HashBuilder`
///
/// ```rust
/// use rustache::HashBuilder;
/// let mut f = |_| { "world".to_string() };
/// let data = HashBuilder::new()
/// .insert_lambda("lambda", &mut f);
/// ```
pub fn insert_lambda<K: ToString>(self,
key: K,
f: &'a mut FnMut(String) -> String)
-> HashBuilder<'a> {
self.insert(key, f)
}
/// Set a path to partials data
pub fn set_partials_path(self, path: &'a str) -> HashBuilder<'a> {
HashBuilder {
data: self.data,
partials_path: path,
}
}
/// Return the built `Data`
fn build(self) -> Data<'a> {
Hash(self.data)
}
}
impl<'a> From<HashBuilder<'a>> for Data<'a> {
fn from(v: HashBuilder<'a>) -> Data<'a> {
v.build()
}
}
/// `VecBuilder` is a helper type that constructs `Data` types in a Vector
pub struct VecBuilder<'a> {
data: Vec<Data<'a>>,
}
impl<'a> VecBuilder<'a> {
/// Create a new `VecBuilder` instance
pub fn new() -> VecBuilder<'a> {
VecBuilder { data: Vec::new() }
}
/// Add a `Into<Data>` to the `VecBuilder`
///
/// ```rust
/// use rustache::VecBuilder;
/// use std::convert::Into;
/// let data = VecBuilder::new()
/// .push("Mage")
/// .push("Druid");
/// ```
/// ```rust
/// use rustache::VecBuilder;
/// let data = VecBuilder::new()
/// .push(VecBuilder::new()
/// .push("Anduin Wrynn".to_string())
/// .push("Jaina Proudmoore".to_string())
/// );
/// ```
/// ```rust
/// use rustache::{HashBuilder, VecBuilder};
/// let data = VecBuilder::new()
/// .push(HashBuilder::new()
/// .insert("first_name".to_string(), "Garrosh".to_string())
/// .insert("last_name".to_string(), "Hellscream".to_string())
/// )
/// .push(HashBuilder::new()
/// .insert("first_name".to_string(), "Malfurion".to_string())
/// .insert("last_name".to_string(), "Stormrage".to_string())
/// );
/// ```
pub fn push<V>(mut self, value: V) -> VecBuilder<'a>
where V: Into<Data<'a>>
{
self.data.push(value.into());
self
}
/// Add a `Lambda` to the `VecBuilder`
///
/// ```rust
/// use rustache::VecBuilder;
/// let mut f = |_| { "world".to_string() };
/// let data = VecBuilder::new()
/// .push_lambda(&mut f);
/// ```
pub fn push_lambda(self, f: &'a mut FnMut(String) -> String) -> VecBuilder<'a> {
self.push(f)
}
/// Return the built `Data`
fn build(self) -> Data<'a> {
Vector(self.data)
}
}
impl<'a> From<VecBuilder<'a>> for Data<'a> {
fn from(v: VecBuilder<'a>) -> Data<'a> {
v.build()
}
}
#[cfg(test)]
mod tests {
use std::collections::HashMap;
use {HashBuilder, VecBuilder};
use Data::{Strng, Bool, Integer, Float, Vector, Hash, Lambda};
#[test]
fn test_new_builders() {
assert_eq!(HashBuilder::new().build(), Hash(HashMap::new()));
assert_eq!(VecBuilder::new().build(), Vector(Vec::new()));
}
#[test]
fn test_set_partials_path() {
let hash = HashBuilder::new().set_partials_path("/path");
assert_eq!(hash.partials_path, "/path");
}
#[test]
fn test_builders() {
let test_string = String::from("Conan the Sorcerian");
let mut hearthstone = HashMap::new();
hearthstone.insert("name".to_string(),
Strng("Hearthstone: Heroes of Warcraft".to_string()));
hearthstone.insert("release_date".to_string(),
Strng("December, 2014".to_string()));
let mut hash1 = HashMap::new();
hash1.insert("first_name".to_string(), Strng("Anduin".to_string()));
hash1.insert("last_name".to_string(), Strng("Wrynn".to_string()));
hash1.insert("age".to_string(), Integer(21i32));
hash1.insert("weight".to_string(), Float(120.16f64));
hash1.insert("class".to_string(), Strng("Priest".to_string()));
hash1.insert("died".to_string(), Bool(false));
hash1.insert("class_cards".to_string(),
Vector(vec![Strng(test_string.clone()),
Strng("Prophet Velen".to_string()),
Hash(hearthstone)]));
let hash2 = HashBuilder::new()
.set_partials_path("/hearthstone")
.insert("first_name", "Anduin")
.insert("last_name", "Wrynn")
.insert("age", 21i32)
.insert("weight", 120.16f64)
.insert("class", "Priest")
.insert("died", false)
.insert("class_cards",
VecBuilder::new()
.push(test_string)
.push("Prophet Velen")
.push(HashBuilder::new()
.insert("name", "Hearthstone: Heroes of Warcraft")
.insert("release_date", "December, 2014")));
assert_eq!(Hash(hash1), Hash(hash2.data));
assert_eq!(hash2.partials_path, "/hearthstone");
}
// #[test]
// fn test_hash_lambda_builder() {
// // Since we can't directly compare closures, just make
// // sure we're threading through the builder
// let mut num = 10u;
// let data = HashBuilder::new()
// .insert_lambda("double", |x| {
// num *= 2u;
// x + num.to_string()
// })
// .build();
// match data {
// Hash(m) => {
// match *m.find_equiv(&("double")).unwrap() {
// Lambda(ref f) => {
// let f = &mut *f.borrow_mut();
// assert_eq!((*f)("double: ".to_string()), "double: 20".to_string());
// assert_eq!((*f)("double: ".to_string()), "double: 40".to_string());
// assert_eq!((*f)("double: ".to_string()), "double: 80".to_string());
// }
// _ => panic!(),
// }
// }
// _ => panic!(),
// }
// }
#[test]
fn test_vec_lambda_builder() {
// Since we can't directly compare closures, just make
// sure we're threading through the builder
let mut num = 10u32;
let mut f = |x: String| -> String {
num *= 2u32;
x + &num.to_string()[..]
};
let data = VecBuilder::new()
.push_lambda(&mut f)
.build();
match data {
Vector(m) => {
match m[0] {
Lambda(ref f) => {
let f = &mut *f.borrow_mut();
assert_eq!((*f)("double: ".to_string()), "double: 20".to_string());
assert_eq!((*f)("double: ".to_string()), "double: 40".to_string());
assert_eq!((*f)("double: ".to_string()), "double: 80".to_string());
}
_ => panic!(),
}
}
_ => panic!(),
}
}
}