Implement zap apple disguises

src/main/java/com/minelittlepony/unicopia/item/ZapAppleItem.java

@@ -95,6 +95,17 @@ public class ZapAppleItem extends AppleItem {
         }
     }
 
+    public ItemStack getAppearanceStack(ItemStack stack) {
+        Item appearance = ((ZapAppleItem)stack.getItem()).getAppearance(stack);
+        if (appearance != Items.AIR) {
+            ItemStack newAppearance = new ItemStack(appearance, stack.getCount());
+            newAppearance.setTag(stack.getTag().copy());
+            newAppearance.removeSubTag("appearance");
+            return newAppearance;
+        }
+        return stack;
+    }
+
     public Item getAppearance(ItemStack stack) {
         if (stack.hasTag() && stack.getTag().contains("appearance")) {
             return Registry.ITEM.get(new Identifier(stack.getTag().getString("appearance")));

src/main/java/com/minelittlepony/unicopia/mixin/client/MixinItemModels.java

@@ -0,0 +1,23 @@
+package com.minelittlepony.unicopia.mixin.client;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.ModifyVariable;
+
+import com.minelittlepony.unicopia.item.ZapAppleItem;
+
+import net.minecraft.client.render.item.ItemModels;
+import net.minecraft.item.ItemStack;
+
+@Mixin(ItemModels.class)
+abstract class MixinItemModels {
+    @ModifyVariable(method = "getModel(Lnet/minecraft/item/ItemStack;)Lnet/minecraft/client/render/model/BakedModel;",
+            at = @At("HEAD"),
+            index = 1)
+    private ItemStack modifyStack(ItemStack stack) {
+        if (stack.getItem() instanceof ZapAppleItem) {
+            return ((ZapAppleItem)stack.getItem()).getAppearanceStack(stack);
+        }
+        return stack;
+    }
+}

src/main/resources/unicopia.mixin.json

@@ -24,6 +24,7 @@
     "client.MixinCamera",
     "client.MixinEntityRenderDispatcher",
     "client.MixinGameRenderer",
+    "client.MixinItemModels",
     "client.MixinKeyboardInput",
     "client.MixinMinecraftClient",
     "client.MixinMouse"