SPIGOT-7209: Accessors and events for player's exp cooldown

By: FreeSoccerHDX <freesoccerhdx@gmail.com>

paper-server/nms-patches/net/minecraft/world/entity/EntityExperienceOrb.patch

@@ -1,6 +1,6 @@
 --- a/net/minecraft/world/entity/EntityExperienceOrb.java
 +++ b/net/minecraft/world/entity/EntityExperienceOrb.java
-@@ -21,6 +21,12 @@
+@@ -21,6 +21,13 @@
  import net.minecraft.world.phys.AxisAlignedBB;
  import net.minecraft.world.phys.Vec3D;
  
@@ -8,12 +8,13 @@
 +import org.bukkit.craftbukkit.event.CraftEventFactory;
 +import org.bukkit.event.entity.EntityTargetLivingEntityEvent;
 +import org.bukkit.event.entity.EntityTargetEvent;
++import org.bukkit.event.player.PlayerExpCooldownChangeEvent;
 +// CraftBukkit end
 +
  public class EntityExperienceOrb extends Entity {
  
      private static final int LIFETIME = 6000;
-@@ -59,6 +65,7 @@
+@@ -59,6 +66,7 @@
      @Override
      public void tick() {
          super.tick();
@@ -21,7 +22,7 @@
          this.xo = this.getX();
          this.yo = this.getY();
          this.zo = this.getZ();
-@@ -84,7 +91,22 @@
+@@ -84,7 +92,22 @@
              this.followingPlayer = null;
          }
  
@@ -45,7 +46,13 @@
              Vec3D vec3d = new Vec3D(this.followingPlayer.getX() - this.getX(), this.followingPlayer.getY() + (double) this.followingPlayer.getEyeHeight() / 2.0D - this.getY(), this.followingPlayer.getZ() - this.getZ());
              double d0 = vec3d.lengthSqr();
  
-@@ -227,7 +249,7 @@
+@@ -222,12 +245,12 @@
+     public void playerTouch(EntityHuman entityhuman) {
+         if (!this.level.isClientSide) {
+             if (entityhuman.takeXpDelay == 0) {
+-                entityhuman.takeXpDelay = 2;
++                entityhuman.takeXpDelay = CraftEventFactory.callPlayerXpCooldownEvent(entityhuman, 2, PlayerExpCooldownChangeEvent.ChangeReason.PICKUP_ORB).getNewCooldown(); // CraftBukkit - entityhuman.takeXpDelay = 2;
+                 entityhuman.take(this, 1);
                  int i = this.repairPlayerItems(entityhuman, this.value);
  
                  if (i > 0) {
@@ -54,7 +61,7 @@
                  }
  
                  --this.count;
-@@ -245,9 +267,17 @@
+@@ -245,9 +268,17 @@
          if (entry != null) {
              ItemStack itemstack = (ItemStack) entry.getValue();
              int j = Math.min(this.xpToDurability(this.value), itemstack.getDamageValue());
@@ -72,7 +79,7 @@
  
              return k > 0 ? this.repairPlayerItems(entityhuman, k) : 0;
          } else {
-@@ -272,6 +302,24 @@
+@@ -272,6 +303,24 @@
      }
  
      public static int getExperienceValue(int i) {

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java

@@ -131,6 +131,7 @@ import org.bukkit.craftbukkit.block.CraftBlockState;
 import org.bukkit.craftbukkit.block.CraftSign;
 import org.bukkit.craftbukkit.block.data.CraftBlockData;
 import org.bukkit.craftbukkit.conversations.ConversationTracker;
+import org.bukkit.craftbukkit.event.CraftEventFactory;
 import org.bukkit.craftbukkit.inventory.CraftItemStack;
 import org.bukkit.craftbukkit.map.CraftMapView;
 import org.bukkit.craftbukkit.map.RenderData;
@@ -143,6 +144,7 @@ import org.bukkit.craftbukkit.util.CraftNamespacedKey;
 import org.bukkit.entity.EntityType;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Player;
+import org.bukkit.event.player.PlayerExpCooldownChangeEvent;
 import org.bukkit.event.player.PlayerHideEntityEvent;
 import org.bukkit.event.player.PlayerRegisterChannelEvent;
 import org.bukkit.event.player.PlayerRespawnEvent.RespawnReason;
@@ -1186,6 +1188,16 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return getHandle().getPlayerWeather();
     }
 
+    @Override
+    public int getExpCooldown() {
+        return getHandle().takeXpDelay;
+    }
+
+    @Override
+    public void setExpCooldown(int ticks) {
+        getHandle().takeXpDelay = CraftEventFactory.callPlayerXpCooldownEvent(this.getHandle(), ticks, PlayerExpCooldownChangeEvent.ChangeReason.PLUGIN).getNewCooldown();
+    }
+
     @Override
     public void resetPlayerWeather() {
         getHandle().resetPlayerWeather();

paper-server/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java

@@ -212,6 +212,7 @@ import org.bukkit.event.player.PlayerBucketFishEvent;
 import org.bukkit.event.player.PlayerEditBookEvent;
 import org.bukkit.event.player.PlayerEvent;
 import org.bukkit.event.player.PlayerExpChangeEvent;
+import org.bukkit.event.player.PlayerExpCooldownChangeEvent;
 import org.bukkit.event.player.PlayerHarvestBlockEvent;
 import org.bukkit.event.player.PlayerInteractEvent;
 import org.bukkit.event.player.PlayerItemBreakEvent;
@@ -1125,6 +1126,13 @@ public class CraftEventFactory {
         return event;
     }
 
+    public static PlayerExpCooldownChangeEvent callPlayerXpCooldownEvent(EntityHuman entity, int newCooldown, PlayerExpCooldownChangeEvent.ChangeReason changeReason) {
+        Player player = (Player) entity.getBukkitEntity();
+        PlayerExpCooldownChangeEvent event = new PlayerExpCooldownChangeEvent(player, newCooldown, changeReason);
+        Bukkit.getPluginManager().callEvent(event);
+        return event;
+    }
+
     public static PlayerItemMendEvent callPlayerItemMendEvent(EntityHuman entity, EntityExperienceOrb orb, net.minecraft.world.item.ItemStack nmsMendedItem, EnumItemSlot slot, int repairAmount) {
         Player player = (Player) entity.getBukkitEntity();
         org.bukkit.inventory.ItemStack bukkitStack = CraftItemStack.asCraftMirror(nmsMendedItem);