add key missing note to chat encryption info

Author: link2xt

src/chat.rs

@@ -1340,7 +1340,11 @@ impl ChatId {
             let fingerprint = contact
                 .fingerprint()
                 .context("Contact does not have a fingerprint in encrypted chat")?;
-            ret += &format!("\n{addr}\n{fingerprint}\n");
+            if contact.public_key(context).await?.is_some() {
+                ret += &format!("\n{addr}\n{fingerprint}\n");
+            } else {
+                ret += &format!("\n{addr}\n(key missing)\n{fingerprint}\n");
+            }
         }
 
         Ok(ret.trim().to_string())

src/chat/chat_tests.rs

@@ -2765,6 +2765,22 @@ async fn test_chat_get_encryption_info() -> Result<()> {
         "No encryption"
     );
 
+    alice.sql.execute("DELETE FROM public_keys", ()).await?;
+    assert_eq!(
+        chat_id.get_encryption_info(alice).await?,
+        "End-to-end encryption available\n\
+         \n\
+         fiona@example.net\n\
+         (key missing)\n\
+         C8BA 50BF 4AC1 2FAF 38D7\n\
+         F657 DDFC 8E9F 3C79 9195\n\
+         \n\
+         bob@example.net\n\
+         (key missing)\n\
+         CCCB 5AA9 F6E1 141C 9431\n\
+         65F1 DB18 B18C BCF7 0487"
+    );
+
     Ok(())
 }