From 294a1918cad7c7d83588c8665b63acc8300443e6 Mon Sep 17 00:00:00 2001
From: Hendrix-Shen <HendrixShen@qq.com>
Date: Fri, 21 May 2021 18:31:40 +0800
Subject: [PATCH] rule `shulkerTeleportFix`

---
 .../java/carpetfixes/CarpetFixesSettings.java |  8 ++++++
 .../ShulkerEntity_CustomDataMixin.java        | 26 +++++++++++++++++++
 src/main/resources/carpetfixes.mixins.json    |  1 +
 3 files changed, 35 insertions(+)
 create mode 100644 src/main/java/carpetfixes/mixins/entityFixes/ShulkerEntity_CustomDataMixin.java

diff --git a/src/main/java/carpetfixes/CarpetFixesSettings.java b/src/main/java/carpetfixes/CarpetFixesSettings.java
index 6a4610ee..2ba91559 100644
--- a/src/main/java/carpetfixes/CarpetFixesSettings.java
+++ b/src/main/java/carpetfixes/CarpetFixesSettings.java
@@ -106,6 +106,14 @@ public class CarpetFixesSettings {
     )
     public static boolean targetBlockPermanentlyPoweredFix = true;
 
+    //By Hendrix-Shen
+    @Rule(
+            desc = "Shulkers do not teleport correctly when going through a portal.",
+            extra = "Fixed [MC-139265](https://bugs.mojang.com/browse/MC-139265) in 21w03a",
+            category = {CARPETFIXES,BACKPORT}
+    )
+    public static boolean shulkerTeleportFix = false;
+
 
     /*
 
diff --git a/src/main/java/carpetfixes/mixins/entityFixes/ShulkerEntity_CustomDataMixin.java b/src/main/java/carpetfixes/mixins/entityFixes/ShulkerEntity_CustomDataMixin.java
new file mode 100644
index 00000000..74a03e83
--- /dev/null
+++ b/src/main/java/carpetfixes/mixins/entityFixes/ShulkerEntity_CustomDataMixin.java
@@ -0,0 +1,26 @@
+package carpetfixes.mixins.entityFixes;
+
+import carpetfixes.CarpetFixesSettings;
+import net.minecraft.entity.mob.ShulkerEntity;
+import net.minecraft.nbt.CompoundTag;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(ShulkerEntity.class)
+public class ShulkerEntity_CustomDataMixin {
+    @Inject(
+            method = "writeCustomDataToTag",
+            at = @At(
+                    value = "INVOKE",
+                    target = "Lnet/minecraft/entity/mob/ShulkerEntity;getAttachedBlock()Lnet/minecraft/util/math/BlockPos;"
+            ),
+            cancellable = true
+    )
+    private void onWriteCustomDataToTag(CompoundTag tag, CallbackInfo ci) {
+        if (CarpetFixesSettings.shulkerTeleportFix) {
+            ci.cancel();
+        }
+    }
+}
diff --git a/src/main/resources/carpetfixes.mixins.json b/src/main/resources/carpetfixes.mixins.json
index 8f6086b2..6441ba15 100644
--- a/src/main/resources/carpetfixes.mixins.json
+++ b/src/main/resources/carpetfixes.mixins.json
@@ -13,6 +13,7 @@
     "dupeFixes.PistonBlock_tntDupingFixMixin",
     "entityFixes.EndCrystalEntity_ExplosionChainingMixin",
     "entityFixes.Entity_blockCollisionMixin",
+    "entityFixes.ShulkerEntity_CustomDataMixin",
     "redstoneFixes.AbstractRedstoneGateBlock_repeaterPriorityMixin",
     "redstoneFixes.PistonBlock_doubleRetractionMixin",
     "redstoneFixes.World_ComparatorNotUpdatingMixin"