Paper/patches/server/0029-Player-affects-spawning-API.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jedediah Smith <jedediah@silencegreys.com>
Date: Tue, 1 Mar 2016 14:47:52 -0600
Subject: [PATCH] Player affects spawning API


diff --git a/src/main/java/net/minecraft/world/entity/EntitySelector.java b/src/main/java/net/minecraft/world/entity/EntitySelector.java
index 3126e8cab3c40e3af47f4c8925e1c6a9523309ba..3207166061bf9c4d7bf3f38e5a9f7aff23ccd5c1 100644
--- a/src/main/java/net/minecraft/world/entity/EntitySelector.java
+++ b/src/main/java/net/minecraft/world/entity/EntitySelector.java
@@ -30,6 +30,11 @@ public final class EntitySelector {
     public static final Predicate<Entity> CAN_BE_COLLIDED_WITH = EntitySelector.NO_SPECTATORS.and(Entity::canBeCollidedWith);
 
     private EntitySelector() {}
+    // Paper start - Affects Spawning API
+    public static final Predicate<Entity> PLAYER_AFFECTS_SPAWNING = (entity) -> {
+        return !entity.isSpectator() && entity.isAlive() && entity instanceof Player player && player.affectsSpawning;
+    };
+    // Paper end - Affects Spawning API
 
     public static Predicate<Entity> withinDistance(double x, double y, double z, double max) {
         double d4 = max * max;
diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index 1de4c45f1a3a69e63eccf063be5516b163f7882a..fa5d8a041858d17c785f033dd2aa3ab242069749 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -849,7 +849,7 @@ public abstract class Mob extends LivingEntity implements Targeting {
         if (this.level().getDifficulty() == Difficulty.PEACEFUL && this.shouldDespawnInPeaceful()) {
             this.discard();
         } else if (!this.isPersistenceRequired() && !this.requiresCustomPersistence()) {
-            Player entityhuman = this.level().getNearestPlayer(this, -1.0D);
+            Player entityhuman = this.level().findNearbyPlayer(this, -1.0D, EntitySelector.PLAYER_AFFECTS_SPAWNING); // Paper - Affects Spawning API
 
             if (entityhuman != null) {
                 double d0 = entityhuman.distanceToSqr((Entity) this);
diff --git a/src/main/java/net/minecraft/world/entity/animal/horse/SkeletonTrapGoal.java b/src/main/java/net/minecraft/world/entity/animal/horse/SkeletonTrapGoal.java
index c7ab59aa0e2fd0f3e7252647ddb25b82ac604830..8f20239f3ef7ebe41fac8ee6e024c36dafec33c4 100644
--- a/src/main/java/net/minecraft/world/entity/animal/horse/SkeletonTrapGoal.java
+++ b/src/main/java/net/minecraft/world/entity/animal/horse/SkeletonTrapGoal.java
@@ -25,7 +25,7 @@ public class SkeletonTrapGoal extends Goal {
 
     @Override
     public boolean canUse() {
-        return this.horse.level().hasNearbyAlivePlayer(this.horse.getX(), this.horse.getY(), this.horse.getZ(), 10.0D);
+        return this.horse.level().hasNearbyAlivePlayerThatAffectsSpawning(this.horse.getX(), this.horse.getY(), this.horse.getZ(), 10.0D); // Paper - Affects Spawning API
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/world/entity/monster/Silverfish.java b/src/main/java/net/minecraft/world/entity/monster/Silverfish.java
index 96181e8925aef7f3d0a2010305caf1f6d9bcfcc9..6f452605e9dc9ebd9980eae9fdeea34417a37a88 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Silverfish.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Silverfish.java
@@ -127,7 +127,7 @@ public class Silverfish extends Monster {
         if (checkAnyLightMonsterSpawnRules(type, world, spawnReason, pos, random)) {
             Player entityhuman = world.getNearestPlayer((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, 5.0D, true);
 
-            return entityhuman == null;
+            return !(entityhuman != null && !entityhuman.affectsSpawning) && entityhuman == null; // Paper - Affects Spawning API
         } else {
             return false;
         }
diff --git a/src/main/java/net/minecraft/world/entity/monster/Zombie.java b/src/main/java/net/minecraft/world/entity/monster/Zombie.java
index a779d32f87b59f347408974e402fad22fdc47f09..15ccde8ee8bac1f70c6047464595aff6db073646 100644
--- a/src/main/java/net/minecraft/world/entity/monster/Zombie.java
+++ b/src/main/java/net/minecraft/world/entity/monster/Zombie.java
@@ -326,7 +326,7 @@ public class Zombie extends Monster {
 
                     if (NaturalSpawner.isSpawnPositionOk(entitypositiontypes_surface, this.level(), blockposition, entitytypes) && SpawnPlacements.checkSpawnRules(entitytypes, worldserver, MobSpawnType.REINFORCEMENT, blockposition, this.level().random)) {
                         entityzombie.setPos((double) i1, (double) j1, (double) k1);
-                        if (!this.level().hasNearbyAlivePlayer((double) i1, (double) j1, (double) k1, 7.0D) && this.level().isUnobstructed(entityzombie) && this.level().noCollision((Entity) entityzombie) && !this.level().containsAnyLiquid(entityzombie.getBoundingBox())) {
+                        if (!this.level().hasNearbyAlivePlayerThatAffectsSpawning((double) i1, (double) j1, (double) k1, 7.0D) && this.level().isUnobstructed(entityzombie) && this.level().noCollision((Entity) entityzombie) && !this.level().containsAnyLiquid(entityzombie.getBoundingBox())) { // Paper - Affects Spawning API
                             entityzombie.setTarget(entityliving, EntityTargetEvent.TargetReason.REINFORCEMENT_TARGET, true); // CraftBukkit
                             entityzombie.finalizeSpawn(worldserver, this.level().getCurrentDifficultyAt(entityzombie.blockPosition()), MobSpawnType.REINFORCEMENT, (SpawnGroupData) null, (CompoundTag) null);
                             worldserver.addFreshEntityWithPassengers(entityzombie, CreatureSpawnEvent.SpawnReason.REINFORCEMENTS); // CraftBukkit
diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
index 79f823c2ce2c5d03c34e580555a7e44a6747bf02..10c2c9d7c7feb878319eb19cd1fb6401da3b9189 100644
--- a/src/main/java/net/minecraft/world/entity/player/Player.java
+++ b/src/main/java/net/minecraft/world/entity/player/Player.java
@@ -180,6 +180,7 @@ public abstract class Player extends LivingEntity {
     @Nullable
     public FishingHook fishing;
     protected float hurtDir;
+    public boolean affectsSpawning = true; // Paper - Affects Spawning API
 
     // CraftBukkit start
     public boolean fauxSleeping;
diff --git a/src/main/java/net/minecraft/world/level/BaseSpawner.java b/src/main/java/net/minecraft/world/level/BaseSpawner.java
index d156f7e3430685947d2b4c30aa867e8002ca70ad..e888cf862662ae6baa6d0de8188aa74a9c6a8e00 100644
--- a/src/main/java/net/minecraft/world/level/BaseSpawner.java
+++ b/src/main/java/net/minecraft/world/level/BaseSpawner.java
@@ -56,7 +56,7 @@ public abstract class BaseSpawner {
     }
 
     public boolean isNearPlayer(Level world, BlockPos pos) {
-        return world.hasNearbyAlivePlayer((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, (double) this.requiredPlayerRange);
+        return world.hasNearbyAlivePlayerThatAffectsSpawning((double) pos.getX() + 0.5D, (double) pos.getY() + 0.5D, (double) pos.getZ() + 0.5D, (double) this.requiredPlayerRange); // Paper - Affects Spawning API
     }
 
     public void clientTick(Level world, BlockPos pos) {
diff --git a/src/main/java/net/minecraft/world/level/EntityGetter.java b/src/main/java/net/minecraft/world/level/EntityGetter.java
index b6a3c75b84d9f768afee33aa0f226207b307c1c0..07e7851ca27ea0f8166be52b086a6504c0deea09 100644
--- a/src/main/java/net/minecraft/world/level/EntityGetter.java
+++ b/src/main/java/net/minecraft/world/level/EntityGetter.java
@@ -70,6 +70,11 @@ public interface EntityGetter {
         }
     }
 
+    // Paper start - Affects Spawning API
+    default @Nullable Player findNearbyPlayer(Entity entity, double maxDistance, @Nullable Predicate<Entity> predicate) {
+        return this.getNearestPlayer(entity.getX(), entity.getY(), entity.getZ(), maxDistance, predicate);
+    }
+    // Paper end - Affects Spawning API
     @Nullable
     default Player getNearestPlayer(double x, double y, double z, double maxDistance, @Nullable Predicate<Entity> targetPredicate) {
         double d = -1.0D;
@@ -99,6 +104,20 @@ public interface EntityGetter {
         return this.getNearestPlayer(x, y, z, maxDistance, predicate);
     }
 
+    // Paper start - Affects Spawning API
+    default boolean hasNearbyAlivePlayerThatAffectsSpawning(double x, double y, double z, double range) {
+        for (Player player : this.players()) {
+            if (EntitySelector.PLAYER_AFFECTS_SPAWNING.test(player)) { // combines NO_SPECTATORS and LIVING_ENTITY_STILL_ALIVE with an "affects spawning" check
+                double distanceSqr = player.distanceToSqr(x, y, z);
+                if (range < 0.0D || distanceSqr < range * range) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    // Paper end - Affects Spawning API
+
     default boolean hasNearbyAlivePlayer(double x, double y, double z, double range) {
         for(Player player : this.players()) {
             if (EntitySelector.NO_SPECTATORS.test(player) && EntitySelector.LIVING_ENTITY_STILL_ALIVE.test(player)) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index d53e15a3a70de8e2a405d3a39ff51a3551e82dbc..a592ee955a823309f1936a607823ff93822cd369 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -2338,6 +2338,17 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         return this.getHandle().language;
     }
 
+    // Paper start
+    public void setAffectsSpawning(boolean affects) {
+        this.getHandle().affectsSpawning = affects;
+    }
+
+    @Override
+    public boolean getAffectsSpawning() {
+        return this.getHandle().affectsSpawning;
+    }
+    // Paper end
+
     @Override
     public void updateCommands() {
         if (this.getHandle().connection == null) return;