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//! Yarte stands for **Y**et **A**nother **R**ust **T**emplate **E**ngine,
//! is the fastest template engine. Uses a Handlebars-like syntax,
//! well known and intuitive for most developers. Yarte is an optimized, and easy-to-use
//! rust crate, can create logic around their templates using using conditionals, loops,
//! rust code and templates composition.
//!
//! [Yarte book](https://yarte.netlify.com)
//!
use std::fmt::{self, Write};

#[cfg(feature = "json")]
pub use yarte_helpers::helpers::{display_fn::DisplayFn, io_fmt::IoFmt};
pub use yarte_helpers::{helpers::Render, recompile, Error, Result};

/// Template trait, will implement by derive like `Display`
pub trait TemplateTrait: fmt::Display {
    /// which will write this template
    fn call(&self) -> Result<String> {
        let mut buf = String::with_capacity(Self::size_hint());
        write!(buf, "{}", self).map(|_| buf)
    }

    /// Approximation of output size used in method `call`.
    /// Yarte implements an heuristic algorithm of allocation.
    fn size_hint() -> usize;
}

pub use yarte_derive::{Template, TemplateText};
pub use TemplateTrait as Template;
pub use TemplateTrait as TemplateText;

#[cfg(feature = "html-min")]
pub use yarte_derive::TemplateMin;
#[cfg(feature = "html-min")]
pub use TemplateTrait as TemplateMin;

#[cfg(feature = "wasm")]
pub use yarte_derive::TemplateWasmServer;
#[cfg(feature = "wasm")]
pub use TemplateTrait as TemplateWasmServer;

#[cfg(feature = "with-actix-web")]
pub mod aw {
    pub use actix_web::{
        error::ErrorInternalServerError, Error, HttpRequest, HttpResponse, Responder,
    };
    pub use futures::future::{err, ok, Ready};
}

#[cfg(feature = "wasm")]
pub mod serde_json {
    pub use serde_json::to_string;
}

#[cfg(feature = "json")]
pub mod sd {
    pub use serde_json::{to_writer, to_writer_pretty};
}