From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 19 Dec 2017 16:31:46 -0500
Subject: [PATCH] ExperienceOrbs API for Reason/Source/Triggering player

Adds lots of information about why this orb exists.

Replaces isFromBottle() with logic that persists entity reloads too.

diff --git a/src/main/java/net/minecraft/server/Block.java b/src/main/java/net/minecraft/server/Block.java
index d847326b0099a0c05a085d5d62de630491c9ac56..b537385d12463adc82751e40b479b047b32fa5bd 100644
--- a/src/main/java/net/minecraft/server/Block.java
+++ b/src/main/java/net/minecraft/server/Block.java
@@ -228,13 +228,13 @@ public class Block extends BlockBase implements IMaterial {
         }
     }
 
-    protected void dropExperience(WorldServer worldserver, BlockPosition blockposition, int i) {
+    protected void dropExperience(WorldServer worldserver, BlockPosition blockposition, int i, EntityPlayer player) { // Paper
         if (worldserver.getGameRules().getBoolean(GameRules.DO_TILE_DROPS)) {
             while (i > 0) {
                 int j = EntityExperienceOrb.getOrbValue(i);
 
                 i -= j;
-                worldserver.addEntity(new EntityExperienceOrb(worldserver, (double) blockposition.getX() + 0.5D, (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, j));
+                worldserver.addEntity(new EntityExperienceOrb(worldserver, (double) blockposition.getX() + 0.5D, (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, j, org.bukkit.entity.ExperienceOrb.SpawnReason.BLOCK_BREAK, player)); // Paper
             }
         }
 
diff --git a/src/main/java/net/minecraft/server/ContainerGrindstone.java b/src/main/java/net/minecraft/server/ContainerGrindstone.java
index 5bdb0c3a7a04a55cd5ddff8e375497e402408811..fe9a083b724a8657cac8462b3f44d3cc12a4db58 100644
--- a/src/main/java/net/minecraft/server/ContainerGrindstone.java
+++ b/src/main/java/net/minecraft/server/ContainerGrindstone.java
@@ -81,7 +81,7 @@ public class ContainerGrindstone extends Container {
                         int k = EntityExperienceOrb.getOrbValue(j);
 
                         j -= k;
-                        world.addEntity(new EntityExperienceOrb(world, (double) blockposition.getX(), (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, k));
+                        world.addEntity(new EntityExperienceOrb(world, (double) blockposition.getX(), (double) blockposition.getY() + 0.5D, (double) blockposition.getZ() + 0.5D, k, org.bukkit.entity.ExperienceOrb.SpawnReason.GRINDSTONE, entityhuman)); // Paper
                     }
 
                     world.triggerEffect(1042, blockposition, 0);
diff --git a/src/main/java/net/minecraft/server/EntityAnimal.java b/src/main/java/net/minecraft/server/EntityAnimal.java
index b2de91eebbc214cff34a3833541559b934c071f7..bba343542e7e6fa83ec802d97b4c139bb210ab28 100644
--- a/src/main/java/net/minecraft/server/EntityAnimal.java
+++ b/src/main/java/net/minecraft/server/EntityAnimal.java
@@ -237,7 +237,7 @@ public abstract class EntityAnimal extends EntityAgeable {
             if (worldserver.getGameRules().getBoolean(GameRules.DO_MOB_LOOT)) {
                 // CraftBukkit start - use event experience
                 if (experience > 0) {
-                    worldserver.addEntity(new EntityExperienceOrb(worldserver, this.locX(), this.locY(), this.locZ(), experience));
+                    worldserver.addEntity(new EntityExperienceOrb(worldserver, this.locX(), this.locY(), this.locZ(), experience, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer, entityageable)); // Paper
                 }
                 // CraftBukkit end
             }
diff --git a/src/main/java/net/minecraft/server/EntityEnderDragon.java b/src/main/java/net/minecraft/server/EntityEnderDragon.java
index 81c926e506c1b6e5c0d909b71f1db81beb645699..ef9df3c7c7c455373641f7a7c701f82a23ffef36 100644
--- a/src/main/java/net/minecraft/server/EntityEnderDragon.java
+++ b/src/main/java/net/minecraft/server/EntityEnderDragon.java
@@ -612,7 +612,7 @@ public class EntityEnderDragon extends EntityInsentient implements IMonster {
             int j = EntityExperienceOrb.getOrbValue(i);
 
             i -= j;
-            this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY(), this.locZ(), j));
+            this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY(), this.locZ(), j, org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, this.killer, this)); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/server/EntityExperienceOrb.java b/src/main/java/net/minecraft/server/EntityExperienceOrb.java
index 2c2d44562f732c75532cda910db5ce67d6a534ab..a9fff75882217b1fd680fd8fd47110f85d88df28 100644
--- a/src/main/java/net/minecraft/server/EntityExperienceOrb.java
+++ b/src/main/java/net/minecraft/server/EntityExperienceOrb.java
@@ -16,9 +16,59 @@ public class EntityExperienceOrb extends Entity {
     public int value;
     private EntityHuman targetPlayer;
     private int targetTime;
+    // Paper start
+    public java.util.UUID sourceEntityId;
+    public java.util.UUID triggerEntityId;
+    public org.bukkit.entity.ExperienceOrb.SpawnReason spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
+
+    private void loadPaperNBT(NBTTagCompound nbttagcompound) {
+        if (!nbttagcompound.hasKeyOfType("Paper.ExpData", 10)) { // 10 = compound
+            return;
+        }
+        NBTTagCompound comp = nbttagcompound.getCompound("Paper.ExpData");
+        if (comp.hasUUID("source")) {
+            this.sourceEntityId = comp.getUUID("source");
+        }
+        if (comp.hasUUID("trigger")) {
+            this.triggerEntityId = comp.getUUID("trigger");
+        }
+        if (comp.hasKey("reason")) {
+            String reason = comp.getString("reason");
+            try {
+                this.spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.valueOf(reason);
+            } catch (Exception e) {
+                this.world.getServer().getLogger().warning("Invalid spawnReason set for experience orb: " + e.getMessage() + " - " + reason);
+            }
+        }
+    }
+    private void savePaperNBT(NBTTagCompound nbttagcompound) {
+        NBTTagCompound comp = new NBTTagCompound();
+        if (this.sourceEntityId != null) {
+            comp.setUUID("source", this.sourceEntityId);
+        }
+        if (this.triggerEntityId != null) {
+            comp.setUUID("trigger", triggerEntityId);
+        }
+        if (this.spawnReason != null && this.spawnReason != org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN) {
+            comp.setString("reason", this.spawnReason.name());
+        }
+        nbttagcompound.set("Paper.ExpData", comp);
+    }
 
     public EntityExperienceOrb(World world, double d0, double d1, double d2, int i) {
+        this(world, d0, d1, d2, i, null, null);
+    }
+
+    public EntityExperienceOrb(World world, double d0, double d1, double d2, int i, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId) {
+        this(world, d0, d1, d2, i, reason, triggerId, null);
+    }
+
+    public EntityExperienceOrb(World world, double d0, double d1, double d2, int i, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId, Entity sourceId) {
         this(EntityTypes.EXPERIENCE_ORB, world);
+        this.sourceEntityId = sourceId != null ? sourceId.getUniqueID() : null;
+        this.triggerEntityId = triggerId != null ? triggerId.getUniqueID() : null;
+        this.spawnReason = reason != null ? reason : org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
+        // Paper end
         this.setPosition(d0, d1, d2);
         this.yaw = (float) (this.random.nextDouble() * 360.0D);
         this.setMot((this.random.nextDouble() * 0.20000000298023224D - 0.10000000149011612D) * 2.0D, this.random.nextDouble() * 0.2D * 2.0D, (this.random.nextDouble() * 0.20000000298023224D - 0.10000000149011612D) * 2.0D);
@@ -153,6 +203,7 @@ public class EntityExperienceOrb extends Entity {
         nbttagcompound.setShort("Health", (short) this.e);
         nbttagcompound.setShort("Age", (short) this.c);
         nbttagcompound.setShort("Value", (short) this.value);
+        this.savePaperNBT(nbttagcompound); // Paper
     }
 
     @Override
@@ -160,6 +211,7 @@ public class EntityExperienceOrb extends Entity {
         this.e = nbttagcompound.getShort("Health");
         this.c = nbttagcompound.getShort("Age");
         this.value = nbttagcompound.getShort("Value");
+        this.loadPaperNBT(nbttagcompound); // Paper
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/server/EntityFishingHook.java b/src/main/java/net/minecraft/server/EntityFishingHook.java
index 9ab0a4638c36d46327435eec4745d2746819d9b0..7c3e36f62f4ab076807cd4b85a70528fffbbc2af 100644
--- a/src/main/java/net/minecraft/server/EntityFishingHook.java
+++ b/src/main/java/net/minecraft/server/EntityFishingHook.java
@@ -464,7 +464,7 @@ public class EntityFishingHook extends IProjectile {
                     this.world.addEntity(entityitem);
                     // CraftBukkit start - this.random.nextInt(6) + 1 -> playerFishEvent.getExpToDrop()
                     if (playerFishEvent.getExpToDrop() > 0) {
-                        entityhuman.world.addEntity(new EntityExperienceOrb(entityhuman.world, entityhuman.locX(), entityhuman.locY() + 0.5D, entityhuman.locZ() + 0.5D, playerFishEvent.getExpToDrop()));
+                        entityhuman.world.addEntity(new EntityExperienceOrb(entityhuman.world, entityhuman.locX(), entityhuman.locY() + 0.5D, entityhuman.locZ() + 0.5D, playerFishEvent.getExpToDrop(), org.bukkit.entity.ExperienceOrb.SpawnReason.FISHING, this.getOwner(), this)); // Paper
                     }
                     // CraftBukkit end
                     if (itemstack1.getItem().a((Tag) TagsItem.FISHES)) {
diff --git a/src/main/java/net/minecraft/server/EntityFox.java b/src/main/java/net/minecraft/server/EntityFox.java
index fef00b46e7cf3690044059f9ee527f799d535b81..a7bbf21e9736a0da38f95d93b013097b1e745306 100644
--- a/src/main/java/net/minecraft/server/EntityFox.java
+++ b/src/main/java/net/minecraft/server/EntityFox.java
@@ -1236,7 +1236,7 @@ public class EntityFox extends EntityAnimal {
                 if (this.b.getGameRules().getBoolean(GameRules.DO_MOB_LOOT)) {
                     // CraftBukkit start - use event experience
                     if (experience > 0) {
-                        this.b.addEntity(new EntityExperienceOrb(this.b, this.animal.locX(), this.animal.locY(), this.animal.locZ(), experience));
+                        this.b.addEntity(new EntityExperienceOrb(this.b, this.animal.locX(), this.animal.locY(), this.animal.locZ(), experience, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer, entityfox)); // Paper
                     }
                     // CraftBukkit end
                 }
diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index a67f6d3bf22c7f59a87ab2340a0a9a6c162f5364..3c36b6ea1d130a150afb4116d18af93de9236cad 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -1488,7 +1488,8 @@ public abstract class EntityLiving extends Entity {
                 int j = EntityExperienceOrb.getOrbValue(i);
 
                 i -= j;
-                this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY(), this.locZ(), j));
+                EntityLiving attacker = killer != null ? killer : lastDamager; // Paper
+                this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY(), this.locZ(), j, this instanceof EntityPlayer ? org.bukkit.entity.ExperienceOrb.SpawnReason.PLAYER_DEATH : org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, attacker, this)); // Paper
             }
             this.expToDrop = 0;
         }
diff --git a/src/main/java/net/minecraft/server/EntityThrownExpBottle.java b/src/main/java/net/minecraft/server/EntityThrownExpBottle.java
index 7a80b341ee7734cc289abdff8755834447cbef75..2d3ca8c424f2088027d51066d634c48723e96214 100644
--- a/src/main/java/net/minecraft/server/EntityThrownExpBottle.java
+++ b/src/main/java/net/minecraft/server/EntityThrownExpBottle.java
@@ -44,7 +44,7 @@ public class EntityThrownExpBottle extends EntityProjectileThrowable {
                 int j = EntityExperienceOrb.getOrbValue(i);
 
                 i -= j;
-                this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY(), this.locZ(), j));
+                this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY(), this.locZ(), j, org.bukkit.entity.ExperienceOrb.SpawnReason.EXP_BOTTLE, getShooter(), this)); // Paper
             }
 
             this.die();
diff --git a/src/main/java/net/minecraft/server/EntityTurtle.java b/src/main/java/net/minecraft/server/EntityTurtle.java
index 61e24c2897a2cb93881caaa6fff86f44461765ac..19c92bea21ddcc3917eb011dcfe41006299356ef 100644
--- a/src/main/java/net/minecraft/server/EntityTurtle.java
+++ b/src/main/java/net/minecraft/server/EntityTurtle.java
@@ -499,7 +499,7 @@ public class EntityTurtle extends EntityAnimal {
             Random random = this.animal.getRandom();
 
             if (this.b.getGameRules().getBoolean(GameRules.DO_MOB_LOOT)) {
-                this.b.addEntity(new EntityExperienceOrb(this.b, this.animal.locX(), this.animal.locY(), this.animal.locZ(), random.nextInt(7) + 1));
+                this.b.addEntity(new EntityExperienceOrb(this.b, this.animal.locX(), this.animal.locY(), this.animal.locZ(), random.nextInt(7) + 1, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer)); // Paper;
             }
 
         }
diff --git a/src/main/java/net/minecraft/server/EntityVillager.java b/src/main/java/net/minecraft/server/EntityVillager.java
index eedec25373cfc8adec7ac8a99b146770dc15c70e..732323ee1de01929c73bc5f98444c0f68f908a67 100644
--- a/src/main/java/net/minecraft/server/EntityVillager.java
+++ b/src/main/java/net/minecraft/server/EntityVillager.java
@@ -532,7 +532,7 @@ public class EntityVillager extends EntityVillagerAbstract implements Reputation
         }
 
         if (merchantrecipe.isRewardExp()) {
-            this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY() + 0.5D, this.locZ(), i));
+            this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY() + 0.5D, this.locZ(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.getTrader(), this)); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/server/EntityVillagerTrader.java b/src/main/java/net/minecraft/server/EntityVillagerTrader.java
index c830b3c2145effc16314c6216be8af935416cb58..f1a509063c09e603140c74255a3fb901693d2cc5 100644
--- a/src/main/java/net/minecraft/server/EntityVillagerTrader.java
+++ b/src/main/java/net/minecraft/server/EntityVillagerTrader.java
@@ -144,7 +144,7 @@ public class EntityVillagerTrader extends EntityVillagerAbstract {
         if (merchantrecipe.isRewardExp()) {
             int i = 3 + this.random.nextInt(4);
 
-            this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY() + 0.5D, this.locZ(), i));
+            this.world.addEntity(new EntityExperienceOrb(this.world, this.locX(), this.locY() + 0.5D, this.locZ(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.getTrader(), this)); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/server/PlayerInteractManager.java b/src/main/java/net/minecraft/server/PlayerInteractManager.java
index 862b17e6226f1488167caf08afe7a37b942f7674..8e5975a4871b99329c78379153ad64575d08d123 100644
--- a/src/main/java/net/minecraft/server/PlayerInteractManager.java
+++ b/src/main/java/net/minecraft/server/PlayerInteractManager.java
@@ -377,7 +377,7 @@ public class PlayerInteractManager {
 
                 // Drop event experience
                 if (flag && event != null) {
-                    iblockdata.getBlock().dropExperience(this.world, blockposition, event.getExpToDrop());
+                    iblockdata.getBlock().dropExperience(this.world, blockposition, event.getExpToDrop(), this.player); // Paper
                 }
 
                 return true;
diff --git a/src/main/java/net/minecraft/server/SlotFurnaceResult.java b/src/main/java/net/minecraft/server/SlotFurnaceResult.java
index d2698e847cfcbc4d2f91b4f5d66b38b47f86c10e..edc4a5c34e8064d900668d132b3496e354408eaf 100644
--- a/src/main/java/net/minecraft/server/SlotFurnaceResult.java
+++ b/src/main/java/net/minecraft/server/SlotFurnaceResult.java
@@ -2,7 +2,7 @@ package net.minecraft.server;
 
 public class SlotFurnaceResult extends Slot {
 
-    private final EntityHuman a;
+    private final EntityHuman a; public final EntityHuman getPlayer() { return this.a; } // Paper OBFHELPER
     private int b;
 
     public SlotFurnaceResult(EntityHuman entityhuman, IInventory iinventory, int i, int j, int k) {
diff --git a/src/main/java/net/minecraft/server/TileEntityFurnace.java b/src/main/java/net/minecraft/server/TileEntityFurnace.java
index a3ddf7be4c7ea588098381b8f05b2bad5b388853..99b20fa5feff0f766124d4ec9474852e33e329f2 100644
--- a/src/main/java/net/minecraft/server/TileEntityFurnace.java
+++ b/src/main/java/net/minecraft/server/TileEntityFurnace.java
@@ -573,7 +573,7 @@ public abstract class TileEntityFurnace extends TileEntityContainer implements I
             int k = EntityExperienceOrb.getOrbValue(j);
 
             j -= k;
-            world.addEntity(new EntityExperienceOrb(world, vec3d.x, vec3d.y, vec3d.z, k));
+            world.addEntity(new EntityExperienceOrb(world, vec3d.x, vec3d.y, vec3d.z, k, org.bukkit.entity.ExperienceOrb.SpawnReason.FURNACE, entityhuman)); // Paper
         }
 
     }
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 54a2324ac61dc0d70155dfc085dcc518a946138a..7b8440c58471315d7b8af786ba8daddc1625865f 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1822,7 +1822,7 @@ public class CraftWorld implements World {
         } else if (TNTPrimed.class.isAssignableFrom(clazz)) {
             entity = new EntityTNTPrimed(world, x, y, z, null);
         } else if (ExperienceOrb.class.isAssignableFrom(clazz)) {
-            entity = new EntityExperienceOrb(world, x, y, z, 0);
+            entity = new EntityExperienceOrb(world, x, y, z, 0, org.bukkit.entity.ExperienceOrb.SpawnReason.CUSTOM, null, null); // Paper
         } else if (LightningStrike.class.isAssignableFrom(clazz)) {
             entity = EntityTypes.LIGHTNING_BOLT.a(world);
         } else if (AreaEffectCloud.class.isAssignableFrom(clazz)) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
index 1b512cc45c7a185b8a7950ff9882e1f2af171cc8..fbad0456757cadea4d7f50c63dbb07bad7e8baa9 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
@@ -20,6 +20,18 @@ public class CraftExperienceOrb extends CraftEntity implements ExperienceOrb {
         getHandle().value = value;
     }
 
+    // Paper start
+    public java.util.UUID getTriggerEntityId() {
+        return getHandle().triggerEntityId;
+    }
+    public java.util.UUID getSourceEntityId() {
+        return getHandle().sourceEntityId;
+    }
+    public SpawnReason getSpawnReason() {
+        return getHandle().spawnReason;
+    }
+    // Paper end
+
     @Override
     public EntityExperienceOrb getHandle() {
         return (EntityExperienceOrb) entity;
