carddav: Implement DAV Push

crates/carddav/src/addressbook/methods/mod.rs

@@ -1,2 +1,3 @@
 pub mod mkcol;
+pub mod post;
 pub mod report;

crates/carddav/src/addressbook/methods/post.rs

@@ -0,0 +1,59 @@
+use crate::Error;
+use actix_web::http::header;
+use actix_web::web::{Data, Path};
+use actix_web::{HttpRequest, HttpResponse};
+use rustical_dav::push::PushRegister;
+use rustical_store::auth::User;
+use rustical_store::{AddressbookStore, Subscription, SubscriptionStore};
+use rustical_xml::XmlDocument;
+use tracing::instrument;
+use tracing_actix_web::RootSpan;
+
+#[instrument(parent = root_span.id(), skip(store, subscription_store, root_span, req))]
+pub async fn route_post<A: AddressbookStore + ?Sized, S: SubscriptionStore + ?Sized>(
+    path: Path<(String, String)>,
+    body: String,
+    user: User,
+    store: Data<A>,
+    subscription_store: Data<S>,
+    root_span: RootSpan,
+    req: HttpRequest,
+) -> Result<HttpResponse, Error> {
+    let (principal, addressbook_id) = path.into_inner();
+    if principal != user.id {
+        return Err(Error::Unauthorized);
+    }
+
+    let addressbook = store.get_addressbook(&principal, &addressbook_id).await?;
+    let request = PushRegister::parse_str(&body)?;
+    let sub_id = uuid::Uuid::new_v4().to_string();
+
+    let expires = if let Some(expires) = request.expires {
+        chrono::DateTime::parse_from_rfc2822(&expires)
+            .map_err(|err| crate::Error::Other(err.into()))?
+    } else {
+        chrono::Utc::now().fixed_offset() + chrono::Duration::weeks(1)
+    };
+
+    let subscription = Subscription {
+        id: sub_id.to_owned(),
+        push_resource: request
+            .subscription
+            .web_push_subscription
+            .push_resource
+            .to_owned(),
+        topic: addressbook.push_topic,
+        expiration: expires.naive_local(),
+    };
+    subscription_store.upsert_subscription(subscription).await?;
+
+    let location = req
+        .resource_map()
+        .url_for(&req, "subscription", &[sub_id])
+        .unwrap();
+
+    Ok(HttpResponse::Created()
+        .append_header((header::LOCATION, location.to_string()))
+        .append_header((header::EXPIRES, expires.to_rfc2822()))
+        .finish())
+}