Paper/patches/unapplied/server/0129-ExperienceOrbs-API-for-Reason-Source-Triggering-play.patch

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/level/ServerPlayerGameMode.java b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
index f772924217c0531b09662a145d8ee5d22dd5ca51..ecfb88b4d9727ad20a2c33475cc6b1ec88821a19 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayerGameMode.java
@@ -415,7 +415,7 @@ public class ServerPlayerGameMode {
 
                 // Drop event experience
                 if (flag && event != null) {
-                    iblockdata.getBlock().popExperience(this.level, pos, event.getExpToDrop());
+                    iblockdata.getBlock().popExperience(this.level, pos, event.getExpToDrop(), this.player); // Paper
                 }
 
                 return true;
diff --git a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
index 41556294841b2c280ba4eff861405ccb6aee19e5..5220e3ee9fab4c4cbc95e0cf1928392316a35e34 100644
--- a/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
+++ b/src/main/java/net/minecraft/world/entity/ExperienceOrb.java
@@ -38,13 +38,63 @@ public class ExperienceOrb extends Entity {
     public int value;
     private int count;
     private Player followingPlayer;
+    // 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(CompoundTag nbttagcompound) {
+        if (!nbttagcompound.contains("Paper.ExpData", 10)) { // 10 = compound
+            return;
+        }
+        CompoundTag 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.contains("reason")) {
+            String reason = comp.getString("reason");
+            try {
+                this.spawnReason = org.bukkit.entity.ExperienceOrb.SpawnReason.valueOf(reason);
+            } catch (Exception e) {
+                this.level.getCraftServer().getLogger().warning("Invalid spawnReason set for experience orb: " + e.getMessage() + " - " + reason);
+            }
+        }
+    }
+    private void savePaperNBT(CompoundTag nbttagcompound) {
+        CompoundTag comp = new CompoundTag();
+        if (this.sourceEntityId != null) {
+            comp.putUUID("source", this.sourceEntityId);
+        }
+        if (this.triggerEntityId != null) {
+            comp.putUUID("trigger", triggerEntityId);
+        }
+        if (this.spawnReason != null && this.spawnReason != org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN) {
+            comp.putString("reason", this.spawnReason.name());
+        }
+        nbttagcompound.put("Paper.ExpData", comp);
+    }
 
     public ExperienceOrb(Level world, double x, double y, double z, int amount) {
+        this(world, x, y, z, amount, null, null);
+    }
+
+    public ExperienceOrb(Level 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 ExperienceOrb(Level world, double d0, double d1, double d2, int i, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId, Entity sourceId) {
         this(EntityType.EXPERIENCE_ORB, world);
-        this.setPos(x, y, z);
+        this.sourceEntityId = sourceId != null ? sourceId.getUUID() : null;
+        this.triggerEntityId = triggerId != null ? triggerId.getUUID() : null;
+        this.spawnReason = reason != null ? reason : org.bukkit.entity.ExperienceOrb.SpawnReason.UNKNOWN;
+        // Paper end
+        this.setPos(d0, d1, d2);
         this.setYRot((float) (this.random.nextDouble() * 360.0D));
         this.setDeltaMovement((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);
-        this.value = amount;
+        this.value = i;
     }
 
     public ExperienceOrb(EntityType<? extends ExperienceOrb> type, Level world) {
@@ -154,12 +204,20 @@ public class ExperienceOrb extends Entity {
     }
 
     public static void award(ServerLevel world, Vec3 pos, int amount) {
+        // Paper start - add reasons for orbs
+        award(world, pos, amount, null, null, null);
+    }
+    public static void award(ServerLevel world, Vec3 pos, int amount, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId) {
+        award(world, pos, amount, reason, triggerId, null);
+    }
+    public static void award(ServerLevel world, Vec3 pos, int amount, org.bukkit.entity.ExperienceOrb.SpawnReason reason, Entity triggerId, Entity sourceId) {
+        // Paper end - add reasons for orbs
         while (amount > 0) {
             int j = ExperienceOrb.getExperienceValue(amount);
 
             amount -= j;
             if (!ExperienceOrb.tryMergeToExisting(world, pos, j)) {
-                world.addFreshEntity(new ExperienceOrb(world, pos.x(), pos.y(), pos.z(), j));
+                world.addFreshEntity(new ExperienceOrb(world, pos.x(), pos.y(), pos.z(), j, reason, triggerId, sourceId)); // Paper - add reason
             }
         }
 
@@ -227,6 +285,7 @@ public class ExperienceOrb extends Entity {
         nbt.putShort("Age", (short) this.age);
         nbt.putShort("Value", (short) this.value);
         nbt.putInt("Count", this.count);
+        this.savePaperNBT(nbt); // Paper
     }
 
     @Override
@@ -235,6 +294,7 @@ public class ExperienceOrb extends Entity {
         this.age = nbt.getShort("Age");
         this.value = nbt.getShort("Value");
         this.count = Math.max(nbt.getInt("Count"), 1);
+        this.loadPaperNBT(nbt); // Paper
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index f6761a4bfa7a73cdbd1ecd4be1f9e78f61a67ae3..4f915072f9847327ec4fa5b33541f7105bc7fff6 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -1704,7 +1704,8 @@ public abstract class LivingEntity extends Entity {
     protected void dropExperience() {
         // CraftBukkit start - Update getExpReward() above if the removed if() changes!
         if (true) {
-            ExperienceOrb.award((ServerLevel) this.level, this.position(), this.expToDrop);
+            LivingEntity attacker = this.lastHurtByPlayer != null ? this.lastHurtByPlayer : this.lastHurtByMob; // Paper
+            ExperienceOrb.award((ServerLevel) this.level, this.position(), this.expToDrop, this instanceof ServerPlayer ? org.bukkit.entity.ExperienceOrb.SpawnReason.PLAYER_DEATH : org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, attacker, this); // Paper
             this.expToDrop = 0;
         }
         // CraftBukkit end
diff --git a/src/main/java/net/minecraft/world/entity/animal/Animal.java b/src/main/java/net/minecraft/world/entity/animal/Animal.java
index c955f34e9c92f3310d2ead4eb887b5fe94180619..43841b5c77beb73169e2ff1645afe1234d8f74c7 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Animal.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Animal.java
@@ -264,7 +264,7 @@ public abstract class Animal extends AgeableMob {
             if (world.getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
                 // CraftBukkit start - use event experience
                 if (experience > 0) {
-                    world.addFreshEntity(new ExperienceOrb(world, this.getX(), this.getY(), this.getZ(), experience));
+                    world.addFreshEntity(new ExperienceOrb(world, this.getX(), this.getY(), this.getZ(), experience, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer, entityageable)); // Paper
                 }
                 // CraftBukkit end
             }
diff --git a/src/main/java/net/minecraft/world/entity/animal/Fox.java b/src/main/java/net/minecraft/world/entity/animal/Fox.java
index a493b9998cd08eda1aeb34087736c5646ee2d8d3..7de3d73232d985ab18d7266371d301c490b79b9f 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Fox.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Fox.java
@@ -883,7 +883,7 @@ public class Fox extends Animal {
                 if (this.level.getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
                     // CraftBukkit start - use event experience
                     if (experience > 0) {
-                        this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), experience));
+                        this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), experience, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer, entityfox)); // Paper
                     }
                     // CraftBukkit end
                 }
diff --git a/src/main/java/net/minecraft/world/entity/animal/Turtle.java b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
index 10e4ed61e20edc4e2203150780d377a0fd8515bb..3ba8fafcd5de584209dd30cadb8e76a46dac4bc8 100644
--- a/src/main/java/net/minecraft/world/entity/animal/Turtle.java
+++ b/src/main/java/net/minecraft/world/entity/animal/Turtle.java
@@ -455,7 +455,7 @@ public class Turtle extends Animal {
             Random random = this.animal.getRandom();
 
             if (this.level.getGameRules().getBoolean(GameRules.RULE_DOMOBLOOT)) {
-                this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), random.nextInt(7) + 1));
+                this.level.addFreshEntity(new ExperienceOrb(this.level, this.animal.getX(), this.animal.getY(), this.animal.getZ(), random.nextInt(7) + 1, org.bukkit.entity.ExperienceOrb.SpawnReason.BREED, entityplayer)); // Paper;
             }
 
         }
diff --git a/src/main/java/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java b/src/main/java/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java
index e17cf38b791f509447ce2c8ef38411530a0fb09b..3a01ffffcc37a93866b8b6774874959dfcabba26 100644
--- a/src/main/java/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java
+++ b/src/main/java/net/minecraft/world/entity/boss/enderdragon/EnderDragon.java
@@ -634,7 +634,7 @@ public class EnderDragon extends Mob implements Enemy {
 
         if (this.level instanceof ServerLevel) {
             if (this.dragonDeathTime > 150 && this.dragonDeathTime % 5 == 0 && flag) {
-                ExperienceOrb.award((ServerLevel) this.level, this.position(), Mth.floor((float) short0 * 0.08F));
+                ExperienceOrb.award((ServerLevel) this.level, this.position(), Mth.floor((float) short0 * 0.08F), org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, this.lastHurtByPlayer, this); // Paper
             }
 
             if (this.dragonDeathTime == 1 && !this.isSilent()) {
@@ -665,7 +665,7 @@ public class EnderDragon extends Mob implements Enemy {
         this.yBodyRot = this.getYRot();
         if (this.dragonDeathTime == 200 && this.level instanceof ServerLevel) {
             if (flag) {
-                ExperienceOrb.award((ServerLevel) this.level, this.position(), Mth.floor((float) short0 * 0.2F));
+                ExperienceOrb.award((ServerLevel) this.level, this.position(), Mth.floor((float) short0 * 0.2F), org.bukkit.entity.ExperienceOrb.SpawnReason.ENTITY_DEATH, this.lastHurtByPlayer, this); // Paper
             }
 
             if (this.dragonFight != null) {
diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
index 7ddcdafdd9b60e9cab2d6b0a3c5b40694ea59506..3839bacbd5f4d06eb13d0e604651232d9fbd7b6a 100644
--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
+++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
@@ -616,7 +616,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
         }
 
         if (offer.shouldRewardExp()) {
-            this.level.addFreshEntity(new ExperienceOrb(this.level, this.getX(), this.getY() + 0.5D, this.getZ(), i));
+            this.level.addFreshEntity(new ExperienceOrb(this.level, this.getX(), this.getY() + 0.5D, this.getZ(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.getTradingPlayer(), this)); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
index 9001d627060b9691b703b4c0e157124b0cdee6bb..1101989e93758294c1adebbef0ab12a3c046e326 100644
--- a/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
+++ b/src/main/java/net/minecraft/world/entity/npc/WanderingTrader.java
@@ -187,7 +187,7 @@ public class WanderingTrader extends net.minecraft.world.entity.npc.AbstractVill
         if (offer.shouldRewardExp()) {
             int i = 3 + this.random.nextInt(4);
 
-            this.level.addFreshEntity(new ExperienceOrb(this.level, this.getX(), this.getY() + 0.5D, this.getZ(), i));
+            this.level.addFreshEntity(new ExperienceOrb(this.level, this.getX(), this.getY() + 0.5D, this.getZ(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.VILLAGER_TRADE, this.getTradingPlayer(), this)); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
index 3353892ab858db5e0ad2833bf56c6a367248f6fb..45d007c519e80415e34eaf404c03bf104b6f9dc1 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/FishingHook.java
@@ -516,7 +516,7 @@ public class FishingHook extends Projectile {
                     this.level.addFreshEntity(entityitem);
                     // CraftBukkit start - this.random.nextInt(6) + 1 -> playerFishEvent.getExpToDrop()
                     if (playerFishEvent.getExpToDrop() > 0) {
-                        entityhuman.level.addFreshEntity(new ExperienceOrb(entityhuman.level, entityhuman.getX(), entityhuman.getY() + 0.5D, entityhuman.getZ() + 0.5D, playerFishEvent.getExpToDrop()));
+                        entityhuman.level.addFreshEntity(new ExperienceOrb(entityhuman.level, entityhuman.getX(), entityhuman.getY() + 0.5D, entityhuman.getZ() + 0.5D, playerFishEvent.getExpToDrop(), org.bukkit.entity.ExperienceOrb.SpawnReason.FISHING, this.getPlayerOwner(), this)); // Paper
                     }
                     // CraftBukkit end
                     if (itemstack1.is((Tag) ItemTags.FISHES)) {
diff --git a/src/main/java/net/minecraft/world/entity/projectile/ThrownExperienceBottle.java b/src/main/java/net/minecraft/world/entity/projectile/ThrownExperienceBottle.java
index 467f9814e0991d31bff7259f266262c81328f05f..11d1db5ef709dfb6fa596ebc4f5fff1415ad4f6d 100644
--- a/src/main/java/net/minecraft/world/entity/projectile/ThrownExperienceBottle.java
+++ b/src/main/java/net/minecraft/world/entity/projectile/ThrownExperienceBottle.java
@@ -51,7 +51,7 @@ public class ThrownExperienceBottle extends ThrowableItemProjectile {
             }
             // CraftBukkit end
 
-            ExperienceOrb.award((ServerLevel) this.level, this.position(), i);
+            ExperienceOrb.award((ServerLevel) this.level, this.position(), i, org.bukkit.entity.ExperienceOrb.SpawnReason.EXP_BOTTLE, this.getOwner(), this); // Paper
             this.discard();
         }
 
diff --git a/src/main/java/net/minecraft/world/inventory/GrindstoneMenu.java b/src/main/java/net/minecraft/world/inventory/GrindstoneMenu.java
index c5e4a0aa901d362cb299298fe2426c1c8f546ece..b268645827b7a57b906fd925d694f802a75da25d 100644
--- a/src/main/java/net/minecraft/world/inventory/GrindstoneMenu.java
+++ b/src/main/java/net/minecraft/world/inventory/GrindstoneMenu.java
@@ -98,7 +98,7 @@ public class GrindstoneMenu extends AbstractContainerMenu {
             public void onTake(net.minecraft.world.entity.player.Player player, ItemStack stack) {
                 context.execute((world, blockposition) -> {
                     if (world instanceof ServerLevel) {
-                        ExperienceOrb.award((ServerLevel) world, Vec3.atCenterOf((Vec3i) blockposition), this.getExperienceAmount(world));
+                        ExperienceOrb.award((ServerLevel) world, Vec3.atCenterOf((Vec3i) blockposition), this.getExperienceAmount(world), org.bukkit.entity.ExperienceOrb.SpawnReason.GRINDSTONE, player); // Paper
                     }
 
                     world.levelEvent(1042, blockposition, 0);
diff --git a/src/main/java/net/minecraft/world/level/block/Block.java b/src/main/java/net/minecraft/world/level/block/Block.java
index 72ef08a59dbf72bec2ce54ab76455c4230395959..6a31e3a3466369ede28e28bc3b9fda8dcb77e136 100644
--- a/src/main/java/net/minecraft/world/level/block/Block.java
+++ b/src/main/java/net/minecraft/world/level/block/Block.java
@@ -374,8 +374,13 @@ public class Block extends BlockBehaviour implements ItemLike {
     }
 
     public void popExperience(ServerLevel world, BlockPos pos, int size) {
+        // Paper start - add player parameter
+        popExperience(world, pos, size, null);
+    }
+    public void popExperience(ServerLevel world, BlockPos pos, int size, net.minecraft.server.level.ServerPlayer player) {
+        // Paper end - add player parameter
         if (world.getGameRules().getBoolean(GameRules.RULE_DOBLOCKDROPS)) {
-            ExperienceOrb.award(world, Vec3.atCenterOf((Vec3i) pos), size);
+            ExperienceOrb.award(world, Vec3.atCenterOf((Vec3i) pos), size, org.bukkit.entity.ExperienceOrb.SpawnReason.BLOCK_BREAK, player); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
index 61ab07be21759df7b92ba71e31c537860f4e5dc2..265fa3cb96b7d39194a7e83b8b77b811bc3e8b40 100644
--- a/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
+++ b/src/main/java/net/minecraft/world/level/block/entity/AbstractFurnaceBlockEntity.java
@@ -624,7 +624,7 @@ public abstract class AbstractFurnaceBlockEntity extends BaseContainerBlockEntit
         j = event.getExpToDrop();
         // CraftBukkit end
 
-        ExperienceOrb.award(worldserver, vec3d, j);
+        ExperienceOrb.award(worldserver, vec3d, j, org.bukkit.entity.ExperienceOrb.SpawnReason.FURNACE, entityhuman); // Paper
     }
 
     @Override
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
index f426891c2ca5688d46b47d5c050314b9e6f6c349..d0873200aa8f66648e23fc2954a27a83289e748c 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
@@ -870,7 +870,7 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
         } else if (TNTPrimed.class.isAssignableFrom(clazz)) {
             entity = new PrimedTnt(world, x, y, z, null);
         } else if (ExperienceOrb.class.isAssignableFrom(clazz)) {
-            entity = new net.minecraft.world.entity.ExperienceOrb(world, x, y, z, 0);
+            entity = new net.minecraft.world.entity.ExperienceOrb(world, x, y, z, 0, org.bukkit.entity.ExperienceOrb.SpawnReason.CUSTOM, null, null); // Paper
         } else if (LightningStrike.class.isAssignableFrom(clazz)) {
             entity = net.minecraft.world.entity.EntityType.LIGHTNING_BOLT.create(world);
             entity.moveTo(location.getX(), location.getY(), location.getZ());
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
index 40713228b149b4532fcee3a54bbe63e161318258..84899284703baeb04bfc79251941265d52ac07e8 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftExperienceOrb.java
@@ -19,6 +19,18 @@ public class CraftExperienceOrb extends CraftEntity implements ExperienceOrb {
         this.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 net.minecraft.world.entity.ExperienceOrb getHandle() {
         return (net.minecraft.world.entity.ExperienceOrb) entity;