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use super::{Auth, WebPushBuilder};
use base64ct::{Base64UrlUnpadded, Encoding};
use http::Uri;
use p256::elliptic_curve::sec1::ToEncodedPoint;
use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
use std::{borrow::Cow, time::Duration};
#[derive(Serialize, Deserialize)]
#[serde(rename = "WebPushBuilder", rename_all = "camelCase")]
struct WebPushSerde<'a> {
#[serde(serialize_with = "url_to_string", deserialize_with = "string_to_url")]
endpoint: Cow<'a, Uri>,
expiration_time: Option<Duration>,
keys: Keys,
}
#[derive(Serialize, Deserialize)]
struct Keys {
#[serde(serialize_with = "auth_to_bytes", deserialize_with = "bytes_to_auth")]
auth: Auth,
#[serde(serialize_with = "p256_to_bytes", deserialize_with = "bytes_to_p256")]
p256dh: p256::PublicKey,
}
fn url_to_string<U: AsRef<Uri>, S: Serializer>(url: U, s: S) -> Result<S::Ok, S::Error> {
s.serialize_str(&url.as_ref().to_string())
}
fn string_to_url<'de, D: Deserializer<'de>>(d: D) -> Result<Cow<'static, Uri>, D::Error> {
let s: &str = Deserialize::deserialize(d)?;
s.parse().map(Cow::Owned).map_err(de::Error::custom)
}
fn auth_to_bytes<S: Serializer>(auth: &Auth, s: S) -> Result<S::Ok, S::Error> {
s.serialize_str(&Base64UrlUnpadded::encode_string(auth.as_slice()))
}
fn bytes_to_auth<'de, D: Deserializer<'de>>(d: D) -> Result<Auth, D::Error> {
let b64: &str = Deserialize::deserialize(d)?;
Ok(Auth::clone_from_slice(
&Base64UrlUnpadded::decode_vec(b64).map_err(de::Error::custom)?,
))
}
fn p256_to_bytes<S: Serializer>(auth: &p256::PublicKey, s: S) -> Result<S::Ok, S::Error> {
s.serialize_str(&Base64UrlUnpadded::encode_string(
auth.to_encoded_point(false).as_bytes(),
))
}
fn bytes_to_p256<'de, D: Deserializer<'de>>(d: D) -> Result<p256::PublicKey, D::Error> {
let b64: &str = Deserialize::deserialize(d)?;
p256::PublicKey::from_sec1_bytes(
&Base64UrlUnpadded::decode_vec(b64).map_err(de::Error::custom)?,
)
.map_err(de::Error::custom)
}
impl Serialize for WebPushBuilder {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
WebPushSerde {
endpoint: Cow::Borrowed(&self.endpoint),
expiration_time: None,
keys: Keys {
auth: self.ua_auth,
p256dh: self.ua_public,
},
}
.serialize(serializer)
}
}
impl<'de> Deserialize<'de> for WebPushBuilder {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
let serde = WebPushSerde::deserialize(deserializer)?;
Ok(WebPushBuilder {
endpoint: serde.endpoint.into_owned(),
valid_duration: Duration::from_secs(12 * 60 * 60),
ua_public: serde.keys.p256dh,
ua_auth: serde.keys.auth,
http_auth: (),
})
}
}