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use sqlx::SqlitePool;
use web_push::{
ContentEncoding, IsahcWebPushClient, PartialVapidSignatureBuilder, SubscriptionInfo,
WebPushClient, WebPushMessageBuilder,
};
use super::{Id, repo::Provider as _};
use crate::{
db::NotFound as _,
user::{self, User},
};
pub struct Push<'a> {
db: &'a SqlitePool,
vapid_public_key: &'a str,
vapid_signer: &'a PartialVapidSignatureBuilder,
}
impl<'a> Push<'a> {
pub const fn new(
db: &'a SqlitePool,
vapid_public_key: &'a str,
vapid_signer: &'a PartialVapidSignatureBuilder,
) -> Self {
Self {
db,
vapid_public_key,
vapid_signer,
}
}
pub fn public_key(&self) -> &str {
self.vapid_public_key
}
pub async fn register(
&self,
user: &User,
subscription: &SubscriptionInfo,
) -> Result<Id, RegisterError> {
let mut tx = self.db.begin().await?;
let id = tx.subscriptions().create(user, subscription).await?;
tx.commit().await?;
Ok(id)
}
async fn send(&self, subscription: &SubscriptionInfo, message: &str) -> Result<(), EchoError> {
let sig_builder = self
.vapid_signer
.clone()
.add_sub_info(subscription)
.build()?;
let payload = message.as_bytes();
let mut message_builder = WebPushMessageBuilder::new(subscription);
message_builder.set_payload(ContentEncoding::Aes128Gcm, payload);
message_builder.set_vapid_signature(sig_builder);
let message = message_builder.build()?;
let client = IsahcWebPushClient::new()?;
client.send(message).await?;
Ok(())
}
pub async fn unregister(&self, user: &User, endpoint: &String) -> Result<(), UnregisterError> {
let mut tx = self.db.begin().await?;
let subscription = tx
.subscriptions()
.by_endpoint(endpoint)
.await
.not_found(|| UnregisterError::NotFound(endpoint.clone()))?;
if subscription.user != user.id {
return Err(UnregisterError::NotSubscriber(
subscription.id,
user.id.clone(),
));
}
tx.subscriptions().delete(&subscription).await?;
tx.commit().await?;
Ok(())
}
}
#[derive(Debug, thiserror::Error)]
pub enum RegisterError {
#[error(transparent)]
Database(#[from] sqlx::Error),
}
#[derive(Debug, thiserror::Error)]
pub enum EchoError {
#[error("subscription {0} not found")]
NotFound(String),
#[error("user {1} is not the subscriber for subscription {0}")]
NotSubscriber(Id, user::Id),
#[error(transparent)]
WebPush(#[from] web_push::WebPushError),
#[error(transparent)]
Database(#[from] sqlx::Error),
}
#[derive(Debug, thiserror::Error)]
pub enum UnregisterError {
#[error("subscription {0} not found")]
NotFound(String),
#[error("user {1} is not the subscriber for subscription {0}")]
NotSubscriber(Id, user::Id),
#[error(transparent)]
Database(#[from] sqlx::Error),
}
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