noteref: move to note.rs

This doesn't need to be in timeline

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

src/note.rs

@@ -1 +1,37 @@
+use nostrdb::{NoteKey, QueryResult};
+use std::cmp::Ordering;
 
+#[derive(Debug, Eq, PartialEq, Copy, Clone)]
+pub struct NoteRef {
+    pub key: NoteKey,
+    pub created_at: u64,
+}
+
+impl NoteRef {
+    pub fn new(key: NoteKey, created_at: u64) -> Self {
+        NoteRef { key, created_at }
+    }
+
+    pub fn from_query_result(qr: QueryResult<'_>) -> Self {
+        NoteRef {
+            key: qr.note_key,
+            created_at: qr.note.created_at(),
+        }
+    }
+}
+
+impl Ord for NoteRef {
+    fn cmp(&self, other: &Self) -> Ordering {
+        match self.created_at.cmp(&other.created_at) {
+            Ordering::Equal => self.key.cmp(&other.key),
+            Ordering::Less => Ordering::Greater,
+            Ordering::Greater => Ordering::Less,
+        }
+    }
+}
+
+impl PartialOrd for NoteRef {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}