Purpur/patches/server/0089-Climbing-should-not-bypass-cramming-gamerule.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: William Blake Galbreath <blake.galbreath@gmail.com>
Date: Sun, 21 Jul 2019 18:06:20 -0500
Subject: [PATCH] Climbing should not bypass cramming gamerule


diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 835975fbc3..04f732428b 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1714,6 +1714,12 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
     }
 
     public boolean isCollidable() {
+        // Purpur start
+        return isCollidable(false);
+    }
+
+    public boolean isCollidable(boolean ignoreClimbing) {
+        // Purpur end
         return false;
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityArmorStand.java b/src/main/java/net/minecraft/server/EntityArmorStand.java
index 7543f2ceeb..c3cde15686 100644
--- a/src/main/java/net/minecraft/server/EntityArmorStand.java
+++ b/src/main/java/net/minecraft/server/EntityArmorStand.java
@@ -318,7 +318,7 @@ public class EntityArmorStand extends EntityLiving {
     }
 
     @Override
-    public boolean isCollidable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
         return false;
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityBat.java b/src/main/java/net/minecraft/server/EntityBat.java
index 3dd3b8913e..99bae2dcb7 100644
--- a/src/main/java/net/minecraft/server/EntityBat.java
+++ b/src/main/java/net/minecraft/server/EntityBat.java
@@ -50,7 +50,7 @@ public class EntityBat extends EntityAmbient {
     }
 
     @Override
-    public boolean isCollidable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
         return false;
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityBoat.java b/src/main/java/net/minecraft/server/EntityBoat.java
index a20d6feb8c..92c1d1794a 100644
--- a/src/main/java/net/minecraft/server/EntityBoat.java
+++ b/src/main/java/net/minecraft/server/EntityBoat.java
@@ -104,7 +104,7 @@ public class EntityBoat extends Entity {
     }
 
     @Override
-    public boolean isCollidable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
         return true;
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityHorseAbstract.java b/src/main/java/net/minecraft/server/EntityHorseAbstract.java
index ee7a2fedde..c9ab80ccd1 100644
--- a/src/main/java/net/minecraft/server/EntityHorseAbstract.java
+++ b/src/main/java/net/minecraft/server/EntityHorseAbstract.java
@@ -165,7 +165,7 @@ public abstract class EntityHorseAbstract extends EntityAnimal implements IInven
     }
 
     @Override
-    public boolean isCollidable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
         return !this.isVehicle();
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityLiving.java b/src/main/java/net/minecraft/server/EntityLiving.java
index 5c4608b7e8..18a49e69a1 100644
--- a/src/main/java/net/minecraft/server/EntityLiving.java
+++ b/src/main/java/net/minecraft/server/EntityLiving.java
@@ -2854,7 +2854,7 @@ public abstract class EntityLiving extends Entity {
         // Paper - end don't run getEntities if we're not going to use its result
         // Tuinity start - reduce memory allocation from collideNearby
         List<Entity> list = com.tuinity.tuinity.util.CachedLists.getTempGetEntitiesList();
-        this.world.getEntities(this, this.getBoundingBox(), IEntitySelector.a(this), list);
+        this.world.getEntities(this, this.getBoundingBox(), IEntitySelector.pushable(this, world.purpurConfig.fixClimbingBypassingCrammingRule), list);
         try {
         // Tuinity end - reduce memory allocation from collideNearby
 
@@ -2998,8 +2998,8 @@ public abstract class EntityLiving extends Entity {
     }
 
     @Override
-    public boolean isCollidable() {
-        return this.isAlive() && !this.isClimbing() && this.collides; // CraftBukkit
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
+        return this.isAlive() && (ignoreClimbing || !isClimbing()) && this.collides; // CraftBukkit // Purpur
     }
 
     // CraftBukkit start - collidable API
diff --git a/src/main/java/net/minecraft/server/EntityMinecartAbstract.java b/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
index cdbe1a32e0..c33b5c950d 100644
--- a/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
+++ b/src/main/java/net/minecraft/server/EntityMinecartAbstract.java
@@ -108,7 +108,7 @@ public abstract class EntityMinecartAbstract extends Entity {
     }
 
     @Override
-    public boolean isCollidable() {
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
         return true;
     }
 
diff --git a/src/main/java/net/minecraft/server/EntityParrot.java b/src/main/java/net/minecraft/server/EntityParrot.java
index 2172fcefbc..7afdb30603 100644
--- a/src/main/java/net/minecraft/server/EntityParrot.java
+++ b/src/main/java/net/minecraft/server/EntityParrot.java
@@ -314,8 +314,8 @@ public class EntityParrot extends EntityPerchable implements EntityBird {
     }
 
     @Override
-    public boolean isCollidable() {
-        return super.isCollidable(); // CraftBukkit - collidable API
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
+        return super.isCollidable(ignoreClimbing); // CraftBukkit - collidable API // Purpur
     }
 
     @Override
diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index 0cb0e6b42d..be7ecb8478 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -1805,8 +1805,8 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
     }
 
     @Override
-    public boolean isCollidable() {
-        return !isAfk() && super.isCollidable();
+    public boolean isCollidable(boolean ignoreClimbing) { // Purpur
+        return !isAfk() && super.isCollidable(ignoreClimbing);
     }
     // Purpur end
 
diff --git a/src/main/java/net/minecraft/server/IEntitySelector.java b/src/main/java/net/minecraft/server/IEntitySelector.java
index 9b4795f3bd..192d9798c4 100644
--- a/src/main/java/net/minecraft/server/IEntitySelector.java
+++ b/src/main/java/net/minecraft/server/IEntitySelector.java
@@ -45,11 +45,17 @@ public final class IEntitySelector {
     }
 
     public static Predicate<Entity> a(Entity entity) {
+        // Purpur start
+        return pushable(entity, false);
+    }
+
+    public static Predicate<Entity> pushable(Entity entity, boolean ignoreClimbing) {
+        // Purpur end
         ScoreboardTeamBase scoreboardteambase = entity.getScoreboardTeam();
         ScoreboardTeamBase.EnumTeamPush scoreboardteambase_enumteampush = scoreboardteambase == null ? ScoreboardTeamBase.EnumTeamPush.ALWAYS : scoreboardteambase.getCollisionRule();
 
         return (Predicate) (scoreboardteambase_enumteampush == ScoreboardTeamBase.EnumTeamPush.NEVER ? Predicates.alwaysFalse() : IEntitySelector.g.and((entity1) -> {
-            if (!entity1.canCollideWith(entity) || !entity.canCollideWith(entity1)) { // CraftBukkit - collidable API
+            if (!entity1.isCollidable(ignoreClimbing) || !entity1.canCollideWith(entity) || !entity.canCollideWith(entity1)) { // CraftBukkit - collidable API
                 return false;
             } else if (entity.world.isClientSide && (!(entity1 instanceof EntityHuman) || !((EntityHuman) entity1).ey())) {
                 return false;
diff --git a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
index a9b1a130be..860e25dfd8 100644
--- a/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
+++ b/src/main/java/net/pl3x/purpur/PurpurWorldConfig.java
@@ -114,6 +114,7 @@ public class PurpurWorldConfig {
     public boolean boatEjectPlayersOnLand = false;
     public boolean disableDropsOnCrammingDeath = false;
     public boolean entitiesPickUpLootBypassMobGriefing = false;
+    public boolean fixClimbingBypassingCrammingRule = false;
     public boolean milkCuresBadOmen = true;
     public boolean saveProjectilesToDisk = true;
     public double tridentLoyaltyVoidReturnHeight = 0.0D;
@@ -123,6 +124,7 @@ public class PurpurWorldConfig {
         boatEjectPlayersOnLand = getBoolean("gameplay-mechanics.boat.eject-players-on-land", boatEjectPlayersOnLand);
         disableDropsOnCrammingDeath = getBoolean("gameplay-mechanics.disable-drops-on-cramming-death", disableDropsOnCrammingDeath);
         entitiesPickUpLootBypassMobGriefing = getBoolean("gameplay-mechanics.entities-pick-up-loot-bypass-mob-griefing", entitiesPickUpLootBypassMobGriefing);
+        fixClimbingBypassingCrammingRule = getBoolean("gameplay-mechanics.fix-climbing-bypassing-cramming-rule", fixClimbingBypassingCrammingRule);
         milkCuresBadOmen = getBoolean("gameplay-mechanics.milk-cures-bad-omen", milkCuresBadOmen);
         saveProjectilesToDisk = getBoolean("gameplay-mechanics.save-projectiles-to-disk", saveProjectilesToDisk);
         tridentLoyaltyVoidReturnHeight = getDouble("gameplay-mechanics.trident-loyalty-void-return-height", tridentLoyaltyVoidReturnHeight);