Make bossbar patch a configurable option

src/main/java/us/myles/ViaVersion/ViaVersionPlugin.java

@@ -236,6 +236,10 @@ public class ViaVersionPlugin extends JavaPlugin implements ViaVersionAPI {
         return getConfig().getBoolean("hologram-patch", false);
     }
 
+    public boolean isBossbarPatch() {
+        return getConfig().getBoolean("bossbar-patch", true);
+    }
+
     public double getHologramYOffset() {
         return getConfig().getDouble("hologram-y", -1D);
     }

src/main/java/us/myles/ViaVersion/transformers/OutgoingTransformer.java

@@ -896,14 +896,14 @@ public class OutgoingTransformer {
             }
         }
 
-        // TODO: Add config option
         // Boss bar
-        if(type == EntityType.ENDER_DRAGON || type == EntityType.WITHER) {
+        if(plugin.isBossbarPatch()) {
-            if(entry.getOldID() == 2) {
+            if (type == EntityType.ENDER_DRAGON || type == EntityType.WITHER) {
+                if (entry.getOldID() == 2) {
                     BossBar bar = bossBarMap.get(entityID);
                     String title = (String) entry.getValue();
                     title = title.isEmpty() ? (type == EntityType.ENDER_DRAGON ? "Ender Dragon" : "Wither") : title;
-                if(bar == null) {
+                    if (bar == null) {
                         bar = ViaVersion.getInstance().createBossBar(title, BossColor.PURPLE, BossStyle.SOLID);
                         bossBarMap.put(entityID, bar);
                         bar.addPlayer(info.getPlayer());
@@ -911,13 +911,13 @@ public class OutgoingTransformer {
                     } else {
                         bar.setTitle((String) entry.getValue());
                     }
-            } else if(entry.getOldID() == 6) {
+                } else if (entry.getOldID() == 6) {
                     BossBar bar = bossBarMap.get(entityID);
                     // Make health range between 0 and 1
                     float maxHealth = type == EntityType.ENDER_DRAGON ? 200.0f : 300.0f;
                     float health = Math.max(0.0f, Math.min(((float) entry.getValue()) / maxHealth, 1.0f));
                     System.out.println(health + " " + entry.getValue());
-                if(bar == null) {
+                    if (bar == null) {
                         String title = type == EntityType.ENDER_DRAGON ? "Ender Dragon" : "Wither";
                         bar = ViaVersion.getInstance().createBossBar(title, health, BossColor.PURPLE, BossStyle.SOLID);
                         bossBarMap.put(entityID, bar);
@@ -929,6 +929,7 @@ public class OutgoingTransformer {
                 }
             }
         }
+    }
 
 
     private UUID getUUID(int id) {

src/main/resources/config.yml

@@ -19,3 +19,5 @@ hologram-patch: false
 hologram-y: -1
 # Enable player tick simulation, this fixes eating, drinking, nether portals.
 simulate-pt: true
+# Should we patch boss bars so they work? (Default: true, disable if you're having issues)
+bossbar-patch: true