BossBars are no longer supported in 1.12 due to api restrictions

src/main/java/me/libraryaddict/disguise/DisguiseConfig.java

@@ -444,6 +444,14 @@ public class DisguiseConfig {
 
         try {
             setNotifyBar(NotifyBar.valueOf(config.getString("NotifyBar").toUpperCase()));
+
+            if (getNotifyBar() == NotifyBar.BOSS_BAR) {
+                DisguiseUtilities.getLogger().warning(
+                        "BossBars hasn't been implemented properly in 1.12 due to api restrictions, falling back to " +
+                                "ACTION_BAR");
+
+                setNotifyBar(NotifyBar.ACTION_BAR);
+            }
         }
         catch (Exception ex) {
             DisguiseUtilities.getLogger()

src/main/java/me/libraryaddict/disguise/disguisetypes/Disguise.java

@@ -20,6 +20,7 @@ import me.libraryaddict.disguise.events.DisguiseEvent;
 import me.libraryaddict.disguise.events.UndisguiseEvent;
 import me.libraryaddict.disguise.utilities.DisguiseUtilities;
 import me.libraryaddict.disguise.utilities.LibsPremium;
+import me.libraryaddict.disguise.utilities.reflection.NmsVersion;
 import me.libraryaddict.disguise.utilities.reflection.ReflectionManager;
 import me.libraryaddict.disguise.utilities.translations.LibsMsg;
 import net.md_5.bungee.api.ChatMessageType;
@@ -186,7 +187,8 @@ public abstract class Disguise {
     }
 
     private void makeBossBar() {
-        if (getNotifyBar() != DisguiseConfig.NotifyBar.BOSS_BAR || !(getEntity() instanceof Player)) {
+        if (getNotifyBar() != DisguiseConfig.NotifyBar.BOSS_BAR || !NmsVersion.v1_13.isSupported() ||
+                !(getEntity() instanceof Player)) {
             return;
         }
 
@@ -803,11 +805,13 @@ public abstract class Disguise {
         getEntity().setMetadata("LastDisguise",
                 new FixedMetadataValue(LibsDisguises.getInstance(), System.currentTimeMillis()));
 
-        BossBar bar = Bukkit.getBossBar(getBossBar());
+        if (NmsVersion.v1_13.isSupported()) {
+            BossBar bar = Bukkit.getBossBar(getBossBar());
 
-        if (bar != null) {
-            bar.removeAll();
-            Bukkit.removeBossBar(getBossBar());
+            if (bar != null) {
+                bar.removeAll();
+                Bukkit.removeBossBar(getBossBar());
+            }
         }
 
         return true;

src/main/java/me/libraryaddict/disguise/utilities/DisguiseUtilities.java

@@ -967,17 +967,19 @@ public class DisguiseUtilities {
             registerNoName(board);
         }
 
-        Iterator<KeyedBossBar> bars = Bukkit.getBossBars();
-        ArrayList<KeyedBossBar> barList = new ArrayList<>();
-        bars.forEachRemaining(barList::add);
+        if (NmsVersion.v1_13.isSupported()) {
+            Iterator<KeyedBossBar> bars = Bukkit.getBossBars();
+            ArrayList<KeyedBossBar> barList = new ArrayList<>();
+            bars.forEachRemaining(barList::add);
 
-        for (KeyedBossBar bar : barList) {
-            if (!bar.getKey().getNamespace().equalsIgnoreCase("libsdisguises")) {
-                continue;
+            for (KeyedBossBar bar : barList) {
+                if (!bar.getKey().getNamespace().equalsIgnoreCase("libsdisguises")) {
+                    continue;
+                }
+
+                bar.removeAll();
+                Bukkit.removeBossBar(bar.getKey());
             }
-
-            bar.removeAll();
-            Bukkit.removeBossBar(bar.getKey());
         }
     }
 

src/main/resources/config.yml

@@ -127,6 +127,7 @@ HearSelfDisguise: true
 
 # When disguised, should a message be displayed to the player? If so, where?
 # The message can be customized in translations
+# BOSS_BAR is not supported in 1.12!
 # NONE, BOSS_BAR, ACTION_BAR
 NotifyBar: ACTION_BAR
 # If using boss bar, these two options come into play