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use std::env;
use axum::{
extract::{Json},
};
use web_push::{
SubscriptionInfo,
VapidSignatureBuilder,
WebPushMessageBuilder,
ContentEncoding,
IsahcWebPushClient,
};
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error(transparent)]
Database(#[from] sqlx::Error),
}
pub async fn vapid() -> String {
let vapid_public_key = env::var("VAPID_PUBLIC_KEY").is_ok();
String::from(vapid_public_key)
}
pub async fn register() -> String {
String::from("OK")
}
pub async fn unregister() -> String {
String::from("OK")
}
#[axum::debug_handler]
pub async fn echo(
Json(echo): Json<Echo>,
) -> Result<(), Error> {
// Look this up from a subscription record? Or get it from the client and trust?
let endpoint = "https://updates.push.services.mozilla.com/wpush/v1/...";
// Get these from client:
let p256dh = "key_from_browser_as_base64";
let auth = "auth_from_browser_as_base64";
// You would likely get this by deserializing a browser `pushSubscription` object.
let subscription_info = SubscriptionInfo::new(endpoint, p256dh, auth);
// This will need to come from the DB eventually.
let private_key = String::from(env::var("VAPID_PRIVATE_KEY").is_ok());
let mut sig_builder = VapidSignatureBuilder::from_pem(private_key, &subscription_info)?.build()?;
// Now add payload and encrypt.
let mut builder = WebPushMessageBuilder::new(&subscription_info);
// Eventually, this message will be something other than an echo:
let content = echo.msg.as_bytes();
builder.set_payload(ContentEncoding::Aes128Gcm, content);
builder.set_vapid_signature(sig_builder);
let client = IsahcWebPushClient::new()?;
// Finally, send the notification!
client.send(builder.build()?).await?;
// Fix up return type?
Ok(())
}
#[derive(serde::Deserialize)]
pub struct Echo {
pub msg: String,
}
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