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use futures::future::{ok, Ready};
use actix_web::{
dev::Payload,
http::header::{COOKIE, LOCATION, SET_COOKIE},
FromRequest, HttpRequest, HttpResponse,
};
use serde::Deserialize;
#[derive(PartialEq, Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum FrontEnd {
Lazy,
Tmtu,
}
impl FrontEnd {
const COOKIE_NAME: &'static str = "front-end";
fn cookie(&self) -> String {
let name = match self {
FrontEnd::Lazy => "lazy",
FrontEnd::Tmtu => "tmtu",
};
format!("{}={}", Self::COOKIE_NAME, name)
}
}
impl FromRequest for FrontEnd {
type Error = ();
type Future = Ready<Result<Self, ()>>;
type Config = ();
fn from_request(req: &HttpRequest, _payload: &mut Payload) -> Self::Future {
for header in req.headers().get_all(COOKIE) {
if let Ok(value) = header.to_str() {
for c in value.split(';').map(|s| s.trim()) {
let mut split = c.split('=');
if Some(Self::COOKIE_NAME) == split.next() {
match split.next() {
Some("lazy") => return ok(FrontEnd::Lazy),
Some("tmtu") => return ok(FrontEnd::Tmtu),
_ => (),
}
}
}
}
}
ok(FrontEnd::Lazy)
}
}
pub fn set_front_end(front: FrontEnd) -> HttpResponse {
HttpResponse::Found()
.header(SET_COOKIE, front.cookie())
.header(LOCATION, "/")
.finish()
}
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