Paper/Spigot-Server-Patches/0344-Mob-Spawner-API-Enhancements.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Fri, 19 Apr 2019 12:41:13 -0500
Subject: [PATCH] Mob Spawner API Enhancements


diff --git a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
index 34bcee4ff55ba118ba393e94b3c25ee2b84feaa2..5538404456dfee42257fad9040fcc0fefdfc5fab 100644
--- a/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
+++ b/src/main/java/net/minecraft/world/level/MobSpawnerAbstract.java
@@ -65,6 +65,7 @@ public abstract class MobSpawnerAbstract {
         this.mobs.clear(); // CraftBukkit - SPIGOT-3496, MC-92282
     }
 
+    public boolean isActivated() { return h(); } // Paper - OBFHELPER
     private boolean h() {
         BlockPosition blockposition = this.b();
 
@@ -221,6 +222,7 @@ public abstract class MobSpawnerAbstract {
         }
     }
 
+    public void resetTimer() { i(); } // Paper - OBFHELPER
     private void i() {
         if (this.maxSpawnDelay <= this.minSpawnDelay) {
             this.spawnDelay = this.minSpawnDelay;
@@ -238,7 +240,13 @@ public abstract class MobSpawnerAbstract {
     }
 
     public void a(NBTTagCompound nbttagcompound) {
+        // Paper start - use larger int if set
+        if (nbttagcompound.hasKey("Paper.Delay")) {
+            this.spawnDelay = nbttagcompound.getInt("Paper.Delay");
+        } else {
         this.spawnDelay = nbttagcompound.getShort("Delay");
+        }
+        // Paper end
         this.mobs.clear();
         if (nbttagcompound.hasKeyOfType("SpawnPotentials", 9)) {
             NBTTagList nbttaglist = nbttagcompound.getList("SpawnPotentials", 10);
@@ -253,10 +261,15 @@ public abstract class MobSpawnerAbstract {
         } else if (!this.mobs.isEmpty()) {
             this.setSpawnData((MobSpawnerData) WeightedRandom.a(this.a().random, this.mobs));
         }
-
+        // Paper start - use ints if set
+        if (nbttagcompound.hasKeyOfType("Paper.MinSpawnDelay", 99)) {
+            this.minSpawnDelay = nbttagcompound.getInt("Paper.MinSpawnDelay");
+            this.maxSpawnDelay = nbttagcompound.getInt("Paper.MaxSpawnDelay");
+            this.spawnCount = nbttagcompound.getShort("SpawnCount");
+        } else // Paper end
         if (nbttagcompound.hasKeyOfType("MinSpawnDelay", 99)) {
-            this.minSpawnDelay = nbttagcompound.getShort("MinSpawnDelay");
-            this.maxSpawnDelay = nbttagcompound.getShort("MaxSpawnDelay");
+            this.minSpawnDelay = nbttagcompound.getInt("MinSpawnDelay");
+            this.maxSpawnDelay = nbttagcompound.getInt("MaxSpawnDelay");
             this.spawnCount = nbttagcompound.getShort("SpawnCount");
         }
 
@@ -281,9 +294,20 @@ public abstract class MobSpawnerAbstract {
         if (minecraftkey == null) {
             return nbttagcompound;
         } else {
-            nbttagcompound.setShort("Delay", (short) this.spawnDelay);
-            nbttagcompound.setShort("MinSpawnDelay", (short) this.minSpawnDelay);
-            nbttagcompound.setShort("MaxSpawnDelay", (short) this.maxSpawnDelay);
+            // Paper start
+            if (spawnDelay > Short.MAX_VALUE) {
+                nbttagcompound.setInt("Paper.Delay", this.spawnDelay);
+            }
+            nbttagcompound.setShort("Delay", (short) Math.min(Short.MAX_VALUE, this.spawnDelay));
+
+            if (minSpawnDelay > Short.MAX_VALUE || maxSpawnDelay > Short.MAX_VALUE) {
+                nbttagcompound.setInt("Paper.MinSpawnDelay", this.minSpawnDelay);
+                nbttagcompound.setInt("Paper.MaxSpawnDelay", this.maxSpawnDelay);
+            }
+
+            nbttagcompound.setShort("MinSpawnDelay", (short) Math.min(Short.MAX_VALUE, this.minSpawnDelay));
+            nbttagcompound.setShort("MaxSpawnDelay", (short) Math.min(Short.MAX_VALUE, this.maxSpawnDelay));
+            // Paper end
             nbttagcompound.setShort("SpawnCount", (short) this.spawnCount);
             nbttagcompound.setShort("MaxNearbyEntities", (short) this.maxNearbyEntities);
             nbttagcompound.setShort("RequiredPlayerRange", (short) this.requiredPlayerRange);
diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftCreatureSpawner.java b/src/main/java/org/bukkit/craftbukkit/block/CraftCreatureSpawner.java
index 28295ebd338806a35cbef164cb014abfe7dae769..3d29be926e36b9a5a981eea1f2a1ec54a4c43393 100644
--- a/src/main/java/org/bukkit/craftbukkit/block/CraftCreatureSpawner.java
+++ b/src/main/java/org/bukkit/craftbukkit/block/CraftCreatureSpawner.java
@@ -1,13 +1,21 @@
 package org.bukkit.craftbukkit.block;
 
 import com.google.common.base.Preconditions;
+import net.minecraft.core.IRegistry;
+import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.resources.MinecraftKey;
 import net.minecraft.world.entity.EntityTypes;
+import net.minecraft.world.level.MobSpawnerData;
 import net.minecraft.world.level.block.entity.TileEntityMobSpawner;
 import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.block.CreatureSpawner;
 import org.bukkit.entity.EntityType;
+// Paper start
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.craftbukkit.util.CraftMagicNumbers;
+import org.bukkit.inventory.ItemStack;
+// Paper end
 
 public class CraftCreatureSpawner extends CraftBlockEntityState<TileEntityMobSpawner> implements CreatureSpawner {
 
@@ -121,4 +129,30 @@ public class CraftCreatureSpawner extends CraftBlockEntityState<TileEntityMobSpa
     public void setSpawnRange(int spawnRange) {
         this.getSnapshot().getSpawner().spawnRange = spawnRange;
     }
+
+    // Paper start
+    @Override
+    public boolean isActivated() {
+        return this.getSnapshot().getSpawner().isActivated();
+    }
+
+    @Override
+    public void resetTimer() {
+        this.getSnapshot().getSpawner().resetTimer();
+    }
+
+    @Override
+    public void setSpawnedItem(ItemStack itemStack) {
+        Preconditions.checkArgument(itemStack != null && !itemStack.getType().isAir(), "spawners cannot spawn air");
+        net.minecraft.world.item.ItemStack item = CraftItemStack.asNMSCopy(itemStack);
+        NBTTagCompound compound = new NBTTagCompound();
+        NBTTagCompound entity = new NBTTagCompound();
+        entity.setString("id", IRegistry.ENTITY_TYPE.getKey(EntityTypes.ITEM).toString());
+        entity.set("Item", item.save(new NBTTagCompound()));
+        compound.set("Entity", entity);
+        compound.setInt("Weight", this.getSnapshotNBT().hasKeyOfType("Weight", CraftMagicNumbers.NBT.TAG_ANY_NUMBER) ? this.getSnapshotNBT().getInt("Weight") : 1);
+        this.getSnapshot().getSpawner().setSpawnData(new MobSpawnerData(compound));
+        this.getSnapshot().getSpawner().mobs.clear();
+    }
+    // Paper end
 }