check if all versions are blocked

Author: hyperdefined

src/main/java/lol/hyper/bungeeblockversion/BungeeBlockVersion.java

@@ -38,7 +38,7 @@ public final class BungeeBlockVersion extends Plugin implements Listener {
 
     public ConfigHandler configHandler;
     public JoinEvent joinEvent;
-    public MiniMessage miniMessage = MiniMessage.miniMessage();
+    public final MiniMessage miniMessage = MiniMessage.miniMessage();
     private BungeeAudiences adventure;
 
     @Override

src/main/java/lol/hyper/bungeeblockversion/events/JoinEvent.java

@@ -45,8 +45,12 @@ public void onPreConnect(LoginEvent event) {
         if (ConfigHandler.versions.contains(event.getConnection().getVersion())) {
             event.setCancelled(true);
             String blockedMessage = ConfigHandler.configuration.getString("disconnect-message");
+            String allowedVersions = VersionToStrings.allowedVersions(ConfigHandler.versions);
+            if (allowedVersions == null) {
+                blockedMessage = "<red>All versions are currently blocked from playing.</red>";
+            }
             if (blockedMessage.contains("{VERSIONS}")) {
-                blockedMessage = blockedMessage.replace("{VERSIONS}", VersionToStrings.allowedVersions(ConfigHandler.versions));
+                blockedMessage = blockedMessage.replace("{VERSIONS}", allowedVersions);
             }
             Component blockedMessageComponent = bungeeBlockVersion.miniMessage.deserialize(blockedMessage);
             BaseComponent blockedMessageBaseComponent = new TextComponent(BungeeComponentSerializer.get().serialize(blockedMessageComponent));

src/main/java/lol/hyper/bungeeblockversion/tools/VersionToStrings.java

@@ -71,7 +71,7 @@ public static String allowedVersions(List<Integer> deniedVersions) {
         List<Integer> allVersions = new ArrayList<>(versionStrings.keySet());
         allVersions.removeAll(deniedVersions);
         if (allVersions.isEmpty()) {
-            return "none";
+            return null;
         }
         int minVersion = Collections.min(allVersions);
         int maxVersion = Collections.max(allVersions);