Add shiny pig tracker

src/main/java/moe/nea/firmament/mixins/EntityDespawnPatch.java

@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Linnea Gräf <nea@nea.moe>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package moe.nea.firmament.mixins;
+
+import com.llamalad7.mixinextras.sugar.Local;
+import moe.nea.firmament.events.EntityDespawnEvent;
+import net.minecraft.client.world.ClientWorld;
+import net.minecraft.entity.Entity;
+import org.jetbrains.annotations.Nullable;
+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(ClientWorld.class)
+public class EntityDespawnPatch {
+    @Inject(method = "removeEntity", at = @At(value = "TAIL"))
+    private void onRemoved(int entityId, Entity.RemovalReason removalReason, CallbackInfo ci, @Local @Nullable Entity entity) {
+        EntityDespawnEvent.Companion.publish(new EntityDespawnEvent(entity, entityId, removalReason));
+    }
+}