nip10: fetch unknown replied-to notes

Signed-off-by: William Casarin <jb55@jb55.com>

Cargo.lock

@@ -2432,7 +2432,7 @@ dependencies = [
 [[package]]
 name = "nostrdb"
 version = "0.3.3"
-source = "git+https://github.com/damus-io/nostrdb-rs?rev=99d8296fcba5957245ed883e2f3b1c0d1cb16397#99d8296fcba5957245ed883e2f3b1c0d1cb16397"
+source = "git+https://github.com/damus-io/nostrdb-rs?rev=5733ece62b8495db8624a21637bacd12ebb22b2c#5733ece62b8495db8624a21637bacd12ebb22b2c"
 dependencies = [
  "bindgen",
  "cc",

Cargo.toml

@@ -33,7 +33,7 @@ serde_json = "1.0.89"
 env_logger = "0.10.0"
 puffin_egui = { version = "0.27.0", optional = true }
 puffin = { version = "0.19.0", optional = true }
-nostrdb = { git = "https://github.com/damus-io/nostrdb-rs", rev = "99d8296fcba5957245ed883e2f3b1c0d1cb16397" }
+nostrdb = { git = "https://github.com/damus-io/nostrdb-rs", rev = "5733ece62b8495db8624a21637bacd12ebb22b2c" }
 #nostrdb = "0.3.3"
 hex = "0.4.3"
 base32 = "0.4.0"

src/app.rs

@@ -207,6 +207,7 @@ impl<'a> UnknownId<'a> {
 
 fn get_unknown_note_ids<'a>(
     ndb: &Ndb,
+    cached_note: &CachedNote,
     txn: &'a Transaction,
     note: &Note<'a>,
     note_key: NoteKey,
@@ -218,6 +219,24 @@ fn get_unknown_note_ids<'a>(
         ids.insert(UnknownId::Pubkey(note.pubkey()));
     }
 
+    // pull notes that notes are replying to
+    if cached_note.reply.root.is_some() {
+        let note_reply = cached_note.reply.borrow(note.tags());
+        if let Some(root) = note_reply.root() {
+            if ndb.get_note_by_id(txn, root.id).is_err() {
+                ids.insert(UnknownId::Id(root.id));
+            }
+        }
+
+        if !note_reply.is_reply_to_root() {
+            if let Some(reply) = note_reply.reply() {
+                if ndb.get_note_by_id(txn, reply.id).is_err() {
+                    ids.insert(UnknownId::Id(reply.id));
+                }
+            }
+        }
+    }
+
     let blocks = ndb.get_blocks_by_key(txn, note_key)?;
     for block in blocks.iter(note) {
         if block.blocktype() != BlockType::MentionBech32 {
@@ -288,8 +307,11 @@ fn poll_notes_for_timeline<'a>(
         .iter()
         .map(|key| {
             let note = damus.ndb.get_note_by_key(txn, *key).expect("no note??");
-
-            let _ = get_unknown_note_ids(&damus.ndb, txn, &note, *key, ids);
+            let cached_note = damus
+                .note_cache_mut()
+                .cached_note_or_insert(*key, &note)
+                .clone();
+            let _ = get_unknown_note_ids(&damus.ndb, &cached_note, txn, &note, *key, ids);
 
             let created_at = note.created_at();
             (
@@ -440,19 +462,43 @@ fn process_event(damus: &mut Damus, _subid: &str, event: &str) {
     }
 }
 
-fn get_unknown_ids<'a>(txn: &'a Transaction, damus: &Damus) -> Result<Vec<UnknownId<'a>>> {
+fn get_unknown_ids<'a>(txn: &'a Transaction, damus: &mut Damus) -> Result<Vec<UnknownId<'a>>> {
     #[cfg(feature = "profiling")]
     puffin::profile_function!();
 
     let mut ids: HashSet<UnknownId> = HashSet::new();
+    let mut new_cached_notes: Vec<(NoteKey, CachedNote)> = vec![];
 
     for timeline in &damus.timelines {
         for noteref in timeline.notes(ViewFilter::NotesAndReplies) {
             let note = damus.ndb.get_note_by_key(txn, noteref.key)?;
-            let _ = get_unknown_note_ids(&damus.ndb, txn, &note, note.key().unwrap(), &mut ids);
+            let note_key = note.key().unwrap();
+            let cached_note = damus.note_cache().cached_note(noteref.key);
+            let cached_note = if let Some(cn) = cached_note {
+                cn.clone()
+            } else {
+                let new_cached_note = CachedNote::new(&note);
+                new_cached_notes.push((note_key, new_cached_note.clone()));
+                new_cached_note
+            };
+
+            let _ = get_unknown_note_ids(
+                &damus.ndb,
+                &cached_note,
+                txn,
+                &note,
+                note.key().unwrap(),
+                &mut ids,
+            );
         }
     }
 
+    // This is mainly done to avoid the double mutable borrow that would happen
+    // if we tried to update the note_cache mutably in the loop above
+    for (note_key, note) in new_cached_notes {
+        damus.note_cache_mut().cache_mut().insert(note_key, note);
+    }
+
     Ok(ids.into_iter().collect())
 }
 
@@ -583,6 +629,10 @@ impl Damus {
         &mut self.note_cache
     }
 
+    pub fn note_cache(&self) -> &NoteCache {
+        &self.note_cache
+    }
+
     pub fn selected_timeline(&mut self) -> &mut Timeline {
         &mut self.timelines[self.selected_timeline as usize]
     }

src/notecache.rs

@@ -16,6 +16,14 @@ impl NoteCache {
             .or_insert_with(|| CachedNote::new(note))
     }
 
+    pub fn cached_note(&self, note_key: NoteKey) -> Option<&CachedNote> {
+        self.cache.get(&note_key)
+    }
+
+    pub fn cache_mut(&mut self) -> &mut HashMap<NoteKey, CachedNote> {
+        &mut self.cache
+    }
+
     pub fn cached_note_or_insert(&mut self, note_key: NoteKey, note: &Note) -> &CachedNote {
         self.cache
             .entry(note_key)
@@ -23,6 +31,7 @@ impl NoteCache {
     }
 }
 
+#[derive(Clone)]
 pub struct CachedNote {
     reltime: TimeCached<String>,
     pub reply: NoteReplyBuf,
@@ -45,7 +54,11 @@ impl CachedNote {
         }
     }
 
-    pub fn reltime_str(&mut self) -> &str {
-        return self.reltime.get();
+    pub fn reltime_str_mut(&mut self) -> &str {
+        self.reltime.get_mut()
+    }
+
+    pub fn reltime_str(&self) -> Option<&str> {
+        self.reltime.get().map(|x| x.as_str())
     }
 }

src/timecache.rs

@@ -1,26 +1,40 @@
+use std::rc::Rc;
 use std::time::{Duration, Instant};
 
+#[derive(Clone)]
 pub struct TimeCached<T> {
     last_update: Instant,
     expires_in: Duration,
     value: Option<T>,
-    refresh: Box<dyn Fn() -> T + 'static>,
+    refresh: Rc<dyn Fn() -> T + 'static>,
 }
 
 impl<T> TimeCached<T> {
-    pub fn new(expires_in: Duration, refresh: Box<dyn Fn() -> T + 'static>) -> Self {
+    pub fn new(expires_in: Duration, refresh: impl Fn() -> T + 'static) -> Self {
         TimeCached {
             last_update: Instant::now(),
             expires_in,
             value: None,
-            refresh,
+            refresh: Rc::new(refresh),
         }
     }
 
-    pub fn get(&mut self) -> &T {
-        if self.value.is_none() || self.last_update.elapsed() > self.expires_in {
-            self.last_update = Instant::now();
-            self.value = Some((self.refresh)());
+    pub fn needs_update(&self) -> bool {
+        self.value.is_none() || self.last_update.elapsed() > self.expires_in
+    }
+
+    pub fn update(&mut self) {
+        self.last_update = Instant::now();
+        self.value = Some((self.refresh)());
+    }
+
+    pub fn get(&self) -> Option<&T> {
+        self.value.as_ref()
+    }
+
+    pub fn get_mut(&mut self) -> &T {
+        if self.needs_update() {
+            self.update();
         }
         self.value.as_ref().unwrap() // This unwrap is safe because we just set the value if it was None.
     }

src/ui/note/mod.rs

@@ -326,7 +326,7 @@ fn render_reltime(
             secondary_label(ui, "⋅");
         }
 
-        secondary_label(ui, note_cache.reltime_str());
+        secondary_label(ui, note_cache.reltime_str_mut());
 
         if !before {
             secondary_label(ui, "⋅");