[F] Fix ongeki upsert all: UserData might be empty list

src/main/java/icu/samnyan/aqua/sega/ongeki/handler/impl/UpsertUserAllHandler.java

@@ -98,11 +98,17 @@ public class UpsertUserAllHandler implements BaseHandler {
 
         // All the field should exist, no need to check now.
         // UserData
+        UserData newUserData;
+        {
             UserData userData;
-        UserData newUserData = upsertUserAll.getUserData().get(0);
 
             Optional<UserData> userOptional = userDataRepository.findByCard_ExtId(userId);
 
+            // UserData might be empty on later runs
+            if (userOptional.isEmpty() && upsertUserAll.getUserData().isEmpty()) {
+                return null;
+            }
+
             if (userOptional.isPresent()) {
                 userData = userOptional.get();
             } else {
@@ -111,6 +117,9 @@ public class UpsertUserAllHandler implements BaseHandler {
                 userData.setCard(card);
             }
 
+            // If new data exists, use new data. Otherwise, use old data
+            newUserData = !upsertUserAll.getUserData().isEmpty() ? upsertUserAll.getUserData().get(0) : userData;
+
             newUserData.setId(userData.getId());
             newUserData.setCard(userData.getCard());
 
@@ -119,6 +128,7 @@ public class UpsertUserAllHandler implements BaseHandler {
             newUserData.setCmEventWatchedDate(userData.getLastPlayDate());
 
             userDataRepository.save(newUserData);
+        }
 
 
         // UserOption