Allow void trading

Author: BillyGalbreath

patches/server/0226-Allow-void-trading.patch

@@ -161,3 +161,12 @@
          this.serverLevelData.setThundering(false, org.bukkit.event.weather.ThunderChangeEvent.Cause.SLEEP); // Paper - Add cause to Weather/ThunderChangeEvents
          // CraftBukkit start
          // If we stop due to everyone sleeping we should reset the weather duration to some other random value.
+@@ -2676,7 +_,7 @@
+             // Spigot start
+             if (entity.getBukkitEntity() instanceof org.bukkit.inventory.InventoryHolder && (!(entity instanceof ServerPlayer) || entity.getRemovalReason() != Entity.RemovalReason.KILLED)) { // SPIGOT-6876: closeInventory clears death message
+                 // Paper start - Fix merchant inventory not closing on entity removal
+-                if (entity.getBukkitEntity() instanceof org.bukkit.inventory.Merchant merchant && merchant.getTrader() != null) {
++                if (!entity.level().purpurConfig.playerVoidTrading && entity.getBukkitEntity() instanceof org.bukkit.inventory.Merchant merchant && merchant.getTrader() != null) { // Purpur - Allow void trading
+                     merchant.getTrader().closeInventory(org.bukkit.event.inventory.InventoryCloseEvent.Reason.UNLOADED);
+                 }
+                 // Paper end - Fix merchant inventory not closing on entity removal

purpur-server/minecraft-patches/sources/net/minecraft/server/level/ServerLevel.java.patch

@@ -423,6 +423,7 @@ private void playerNetheriteFireResistance() {
     public boolean playerRemoveBindingWithWeakness = false;
     public int shiftRightClickRepairsMendingPoints = 0;
     public int playerExpPickupDelay = 2;
+    public boolean playerVoidTrading = false;
     private void playerSettings() {
         if (PurpurConfig.version < 19) {
             boolean oldVal = getBoolean("gameplay-mechanics.player.idle-timeout.mods-target", idleTimeoutTargetPlayer);
@@ -449,6 +450,7 @@ private void playerSettings() {
         playerRemoveBindingWithWeakness = getBoolean("gameplay-mechanics.player.curse-of-binding.remove-with-weakness", playerRemoveBindingWithWeakness);
         shiftRightClickRepairsMendingPoints = getInt("gameplay-mechanics.player.shift-right-click-repairs-mending-points", shiftRightClickRepairsMendingPoints);
         playerExpPickupDelay = getInt("gameplay-mechanics.player.exp-pickup-delay-ticks", playerExpPickupDelay);
+        playerVoidTrading = getBoolean("gameplay-mechanics.player.allow-void-trading", playerVoidTrading);
     }
 
     public boolean silkTouchEnabled = false;