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use axum::{
extract::{Path, State},
http::{header, StatusCode},
response::{IntoResponse, Redirect, Response},
routing::get,
Router,
};
use mime_guess::Mime;
use rust_embed::EmbeddedFile;
use crate::{app::App, channel, error::Internal, login::Login};
#[derive(rust_embed::Embed)]
#[folder = "target/ui"]
struct Assets;
impl Assets {
fn load(path: impl AsRef<str>) -> Result<Asset, NotFound<String>> {
let path = path.as_ref();
let mime = mime_guess::from_path(path).first_or_octet_stream();
Self::get(path)
.map(|file| Asset(mime, file))
.ok_or(NotFound(format!("not found: {path}")))
}
fn index() -> Result<Asset, Internal> {
// "not found" in this case really is an internal error, as it should
// never happen. `index.html` is a known-valid path.
Ok(Self::load("index.html")?)
}
}
pub fn router() -> Router<App> {
Router::new()
.route("/*path", get(asset))
.route("/", get(root))
.route("/login", get(login))
.route("/ch/:channel", get(channel))
}
async fn asset(Path(path): Path<String>) -> Result<Asset, NotFound<String>> {
Assets::load(path)
}
async fn root(login: Option<Login>) -> Result<impl IntoResponse, Internal> {
if login.is_none() {
Ok(Redirect::temporary("/login").into_response())
} else {
Ok(Assets::index()?.into_response())
}
}
async fn login() -> Result<impl IntoResponse, Internal> {
Assets::index()
}
async fn channel(
State(app): State<App>,
login: Option<Login>,
Path(channel): Path<channel::Id>,
) -> Result<impl IntoResponse, Internal> {
if login.is_none() {
Ok(Redirect::temporary("/").into_response())
} else if app.channels().get(&channel).await?.is_none() {
Ok(NotFound(Assets::index()?).into_response())
} else {
Ok(Assets::index()?.into_response())
}
}
struct Asset(Mime, EmbeddedFile);
impl IntoResponse for Asset {
fn into_response(self) -> Response {
let Self(mime, file) = self;
(
StatusCode::OK,
[(header::CONTENT_TYPE, mime.as_ref())],
file.data,
)
.into_response()
}
}
#[derive(Debug, thiserror::Error)]
#[error("{0}")]
struct NotFound<E>(pub E);
impl<E> IntoResponse for NotFound<E>
where
E: IntoResponse,
{
fn into_response(self) -> Response {
let Self(response) = self;
(StatusCode::NOT_FOUND, response).into_response()
}
}
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