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use handlebars::Handlebars;
use hyper::service::{make_service_fn, service_fn};
use hyper::Method;
use hyper::StatusCode;
use hyper::{Body, Request, Response, Server};
use serde::{Deserialize, Serialize};
use std::convert::Infallible;
use std::net::SocketAddr;
mod templates;
#[tokio::main]
async fn main() {
// bind to 127.0.0.1:3000
let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
let make_svc = make_service_fn(|_conn| async { Ok::<_, Infallible>(service_fn(router)) });
let server = Server::bind(&addr).serve(make_svc);
let graceful = server.with_graceful_shutdown(shutdown_signal());
// run until shutdown signal
if let Err(e) = graceful.await {
eprintln!("server error: {}", e);
}
}
async fn router(req: Request<Body>) -> Result<Response<Body>, Infallible> {
match (req.method(), req.uri().path()) {
(&Method::GET, "/") | (&Method::GET, "/index.html") => Ok(Response::new("Welcome!".into())),
(&Method::GET, "/parts") | (&Method::GET, "/parts/index.html") => parts(req).await,
_ => Ok(Response::builder()
.status(StatusCode::NOT_FOUND)
.body("Not found.".into())
.unwrap()),
}
}
async fn parts(req: Request<Body>) -> Result<Response<Body>, Infallible> {
let query = req.uri().query().unwrap_or_default();
let filter = serde_urlencoded::de::from_str::<PartsRequest>(query).unwrap();
let mut reg = Handlebars::new();
reg.register_template_string("index", templates::INDEX_T)
.unwrap();
let mut data = PartsView::default();
data.makes = Some(vec!["Hudson".into(), "Essex".into()]);
if let Some(make) = filter.make {
if make.eq("Hudson") {
data.models = Some(vec!["Hornet".into(), "Wasp".into(), "Jet".into()]);
} else if make.eq("Essex") {
data.models = Some(vec!["Super Six".into()]);
}
data.selected_make = Some(make);
}
data.parts = Some(Vec::new());
if let Some(model) = filter.model {
data.parts = Some(vec!["1".into(), "2".into(), "3".into()]);
data.selected_model = Some(model);
}
let result = reg.render("index", &data).unwrap();
Ok(Response::new(result.into()))
}
async fn shutdown_signal() {
// Wait for CTRL+C
tokio::signal::ctrl_c()
.await
.expect("failed to install CTRL+C signal handler");
}
#[derive(Debug, Deserialize)]
struct PartsRequest {
make: Option<String>,
model: Option<String>,
}
#[derive(Debug, Serialize, Default)]
struct PartsView {
makes: Option<Vec<String>>,
models: Option<Vec<String>>,
selected_make: Option<String>,
selected_model: Option<String>,
parts: Option<Vec<String>>,
}
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