Workaround for empty server messages (typing indicator)

kordophone-db/src/repository.rs

@@ -250,6 +250,10 @@ impl<'a> Repository<'a> {
                 Ok(())
             })?;
 
+        // TODO: May need to update conversation metadata here, but this has a perf impact.
+        // Ideally we would consolidate this in the code above, assuming we're only inserting *new* messages, but 
+        // this may not necessarily be the case.
+
         Ok(())
     }
 
@@ -325,8 +329,15 @@ impl<'a> Repository<'a> {
                     conversation_guid,
                     last_message
                 );
-                conversation.date = last_message.date;
+
-                conversation.last_message_preview = Some(last_message.text.clone());
+                if last_message.date > conversation.date {
+                    conversation.date = last_message.date;
+                }
+
+                if !last_message.text.is_empty() && !last_message.text.trim().is_empty() {
+                    conversation.last_message_preview = Some(last_message.text.clone());
+                }
+
                 self.insert_conversation(conversation)?;
             }
         }

kordophoned/src/daemon/mod.rs

@@ -559,7 +559,15 @@ impl Daemon {
         let messages = client
             .get_messages(&conversation_id, None, None, last_message_id)
             .await?;
-        let db_messages: Vec<kordophone_db::models::Message> = messages
+
+        // Filter messages that have an empty body, or a body that is just whitespace.
+        // This is a workaround for a bug in the server where it returns messages with an empty body, which is usually 
+        // the typing indicator or stuff like that. In the future, we need to move to ChatItems instead of Messages. 
+        let insertable_messages: Vec<kordophone::model::Message> = messages
+            .into_iter()
+            .filter(|m| !m.text.is_empty() && !m.text.trim().is_empty()).collect();
+
+        let db_messages: Vec<kordophone_db::models::Message> = insertable_messages
             .into_iter()
             .map(kordophone_db::models::Message::from)
             .collect();