Add ExploitFix.PreventPluginNPCInteraction to experience.yml

Read the changelog for why

Changelog.txt

@@ -1,3 +1,11 @@
+Version 2.1.164
+    New exploit fix setting, when disabled it will allow combat interactions with "NPC" entities from plugins like Citizens
+    ExploitFix.PreventPluginNPCInteraction Added to experience.yml
+
+    NOTES:
+    Historically mcMMO has checked an entity for being a NPC (not a Villager) and backed out of any interaction, this was originally done because of NPCs that were meant to be invincible/etc and not give XP
+    However nowadays what an NPC is used for is pretty loose, mcMMO only has definitions for some NPCs (such as from Citizens) it doesn't know about most NPCs in most plugins unless they identify themselves in a similar way to the predefined parameters
+
 Version 2.1.163
     Fixed the translate URL pointing to the wrong place (thanks chew)
     Fixed a bug where FlatFile databases would always attempt a UUID conversion task every save operation (every 10 minutes) causing console spam

src/main/java/com/gmail/nossr50/config/experience/ExperienceConfig.java

@@ -152,6 +152,7 @@ public class ExperienceConfig extends AutoUpdateConfigLoader {
     public boolean isPistonExploitPrevented() { return config.getBoolean("ExploitFix.Pistons", false); }
     public boolean allowUnsafeEnchantments() { return config.getBoolean("ExploitFix.UnsafeEnchantments", false); }
     public boolean isCOTWBreedingPrevented() { return config.getBoolean("ExploitFix.COTWBreeding", true); }
+    public boolean isNPCInteractionPrevented() { return config.getBoolean("ExploitFix.PreventPluginNPCInteraction", true); }
 
     public boolean isFishingExploitingPrevented() { return config.getBoolean("ExploitFix.Fishing", true); }
     public boolean isAcrobaticsExploitingPrevented() { return config.getBoolean("ExploitFix.Acrobatics", true); }

src/main/java/com/gmail/nossr50/listeners/EntityListener.java

@@ -312,7 +312,8 @@ public class EntityListener implements Listener {
             return;
         }
 
-        if (Misc.isNPCEntityExcludingVillagers(defender) || !defender.isValid() || !(defender instanceof LivingEntity)) {
+
+        if ((ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(defender)) || !defender.isValid() || !(defender instanceof LivingEntity)) {
             return;
         }
 
@@ -322,7 +323,7 @@ public class EntityListener implements Listener {
             return;
         }
 
-        if (Misc.isNPCEntityExcludingVillagers(attacker)) {
+        if (ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(attacker)) {
             return;
         }
 
@@ -502,7 +503,7 @@ public class EntityListener implements Listener {
         }
         */
 
-        if (Misc.isNPCEntityExcludingVillagers(entity) || !entity.isValid() || !(entity instanceof LivingEntity)) {
+        if ((ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(entity)) || !entity.isValid() || !(entity instanceof LivingEntity)) {
             return;
         }
 
@@ -649,7 +650,7 @@ public class EntityListener implements Listener {
 
         LivingEntity entity = event.getEntity();
 
-        if (Misc.isNPCEntityExcludingVillagers(entity)) {
+        if (ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(entity)) {
             return;
         }
 
@@ -957,7 +958,7 @@ public class EntityListener implements Listener {
         LivingEntity livingEntity = event.getEntity();
 
         if (!UserManager.hasPlayerDataKey(player)
-                || Misc.isNPCEntityExcludingVillagers(livingEntity)
+                || (ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(livingEntity))
                 || persistentDataLayer.hasMobFlag(MobMetaFlagType.EGG_MOB, livingEntity)
                 || persistentDataLayer.hasMobFlag(MobMetaFlagType.MOB_SPAWNER_MOB, livingEntity)) {
             return;

src/main/java/com/gmail/nossr50/listeners/PlayerListener.java

@@ -895,7 +895,7 @@ public class PlayerListener implements Listener {
     public void onPlayerChat(AsyncPlayerChatEvent event) {
         Player player = event.getPlayer();
 
-        if (Misc.isNPCEntityExcludingVillagers(player) || !UserManager.hasPlayerDataKey(player)) {
+        if ((ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(player)) || !UserManager.hasPlayerDataKey(player)) {
             return;
         }
 

src/main/java/com/gmail/nossr50/util/EventUtils.java

@@ -1,6 +1,7 @@
 package com.gmail.nossr50.util;
 
 import com.gmail.nossr50.config.Config;
+import com.gmail.nossr50.config.experience.ExperienceConfig;
 import com.gmail.nossr50.datatypes.experience.XPGainReason;
 import com.gmail.nossr50.datatypes.experience.XPGainSource;
 import com.gmail.nossr50.datatypes.party.Party;

src/main/java/com/gmail/nossr50/util/skills/CombatUtils.java

@@ -321,8 +321,10 @@ public final class CombatUtils {
         EntityType entityType = painSource.getType();
 
         if (target instanceof Player) {
-            if (Misc.isNPCEntityExcludingVillagers(target)) {
+            if(ExperienceConfig.getInstance().isNPCInteractionPrevented()) {
-                return;
+                if (Misc.isNPCEntityExcludingVillagers(target)) {
+                    return;
+                }
             }
 
             Player player = (Player) target;
@@ -692,7 +694,7 @@ public final class CombatUtils {
                 break;
             }
 
-            if (Misc.isNPCEntityExcludingVillagers(entity) || !(entity instanceof LivingEntity) || !shouldBeAffected(attacker, entity)) {
+            if ((ExperienceConfig.getInstance().isNPCInteractionPrevented() && Misc.isNPCEntityExcludingVillagers(entity)) || !(entity instanceof LivingEntity) || !shouldBeAffected(attacker, entity)) {
                 continue;
             }
 

src/main/resources/experience.yml

@@ -35,6 +35,10 @@ ExploitFix:
     TreeFellerReducedXP: true
     PistonCheating: true
     SnowGolemExcavation: true
+    # This include NPCs from stuff like Citizens, this is not a setting for Vanilla Minecraft Villagers (Which can be considered NPCs)
+    # mcMMO normally doesn't process attacks against an Entity if it is an NPC from another plugin
+    # Of course, mcMMO doesn't know for sure whether or not something is an NPC, it checks a few known things, see our source code to see how
+    PreventPluginNPCInteraction: true
 Experience_Bars:
     # Turn this to false if you wanna disable XP bars
     Enable: true