Profiles: notify followers on submission publish

Expose API for paging notifications

profiles/src/apub/actions/submission.rs

@@ -146,6 +146,24 @@ impl Action for UpdateSubmission {
 
         let newly_published = !initial_published && submission.published().is_some();
         let profile_id = submission.profile_id();
+
+        if newly_published {
+            if let Some(published) = submission.published() {
+                let ctx_clone = ctx.clone();
+                ctx.spawn_blocking(move || {
+                    for follower_id in ctx_clone.store.view.follows.forward_iter(profile_id) {
+                        if let Ok(Some(true)) = ctx_clone.store.profiles.is_local(follower_id) {
+                            ctx_clone.store.view.submissions.new(
+                                follower_id,
+                                submission_id,
+                                published,
+                            );
+                        }
+                    }
+                });
+            }
+        }
+
         if ctx.is_local(profile_id)? {
             if newly_published {
                 return Ok(Some(Box::new(crate::apub::results::SubmissionCreated {

profiles/src/store/profile.rs

@@ -330,6 +330,7 @@ impl Store {
                 let range_end = range_end.as_bytes().to_vec();
                 this.date_range(..range_end)
             })
+            .rev()
     }
 
     pub fn is_local(&self, id: Uuid) -> Result<Option<bool>, StoreError> {

profiles/src/store/view/notif.rs

@@ -301,6 +301,60 @@ impl NotificationStore {
             .values()
             .filter_map(|res| res.ok())
             .filter_map(uuid_from_ivec)
+            .rev()
+    }
+
+    pub fn older_than_for_profile<'a>(
+        &'a self,
+        profile_id: Uuid,
+        notification_id: Uuid,
+    ) -> impl DoubleEndedIterator<Item = Uuid> + 'a {
+        let keys = self.keys();
+
+        self.dates
+            .get(keys.date_key(profile_id, notification_id))
+            .ok()
+            .and_then(|opt| opt)
+            .and_then(date_from_ivec)
+            .into_iter()
+            .flat_map(move |date| {
+                let keys = keys.clone();
+                self.notifications
+                    .range(
+                        ..keys
+                            .notification_key(profile_id, date, notification_id)
+                            .as_bytes(),
+                    )
+                    .values()
+                    .filter_map(|res| res.ok())
+                    .filter_map(uuid_from_ivec)
+            })
+            .rev()
+    }
+
+    pub fn newer_than_for_profile<'a>(
+        &'a self,
+        profile_id: Uuid,
+        notification_id: Uuid,
+    ) -> impl DoubleEndedIterator<Item = Uuid> + 'a {
+        let keys = self.keys();
+
+        self.dates
+            .get(keys.date_key(profile_id, notification_id))
+            .ok()
+            .and_then(|opt| opt)
+            .and_then(date_from_ivec)
+            .into_iter()
+            .flat_map(move |date| {
+                self.notifications
+                    .range(
+                        keys.notification_key(profile_id, date, notification_id)
+                            .as_bytes()..,
+                    )
+                    .values()
+                    .filter_map(|res| res.ok())
+                    .filter_map(uuid_from_ivec)
+            })
     }
 
     fn notification_keys(&self, profile_id: Uuid) -> impl DoubleEndedIterator<Item = sled::IVec> {
@@ -337,3 +391,8 @@ fn uuid_from_ivec(ivec: sled::IVec) -> Option<Uuid> {
         .map_err(|e| log::warn!("Failed to parse ivec {}", e))
         .ok()
 }
+
+fn date_from_ivec(ivec: sled::IVec) -> Option<DateTime<Utc>> {
+    let s = String::from_utf8_lossy(&ivec);
+    s.parse().ok()
+}