Reimplement diet stuff

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/crafting/SpellDuplicatingRecipe.java

@@ -28,7 +28,7 @@ public record SpellDuplicatingRecipe (IngredientWithSpell material) implements S
     public void buildCraftingTree(CraftingTreeBuilder builder) {
         ItemStack[] spells = SpellType.REGISTRY.stream()
                 .filter(SpellType::isObtainable)
-                .map(UItems.GEMSTONE::getDefaultStack)
+                .map(i -> EnchantableItem.enchant(UItems.GEMSTONE.getDefaultStack(), i))
                 .toArray(ItemStack[]::new);
         builder.input(UItems.BOTCHED_GEM.getDefaultStack());
         builder.input(spells);

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/crafting/SpellShapedCraftingRecipe.java

@@ -47,7 +47,7 @@ public class SpellShapedCraftingRecipe extends ShapedRecipe {
         return inventory.getStacks().stream()
             .filter(stack -> stack.getItem() instanceof EnchantableItem)
             .filter(EnchantableItem::isEnchanted)
-            .map(stack -> ((EnchantableItem)stack.getItem()).getSpellEffect(stack))
+            .map(stack -> EnchantableItem.getSpellEffect(stack))
             .findFirst()
             .map(spell -> spell.traits().applyTo(EnchantableItem.enchant(super.craft(inventory, registries), spell.type())))
             .orElseGet(() -> super.craft(inventory, registries));

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CustomisedSpellType.java

@@ -2,6 +2,7 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 import org.jetbrains.annotations.Nullable;
@@ -15,7 +16,10 @@ import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.client.TextHelper;
 import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 
+import net.minecraft.item.Item.TooltipContext;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipAppender;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.text.MutableText;
@@ -27,7 +31,7 @@ public record CustomisedSpellType<T extends Spell> (
         SpellType<T> type,
         SpellTraits traits,
         Supplier<SpellTraits> traitsDifferenceSupplier
-    ) implements SpellPredicate<T> {
+    ) implements SpellPredicate<T>, TooltipAppender {
 
     public boolean isEmpty() {
         return type.isEmpty();
@@ -86,25 +90,25 @@ public record CustomisedSpellType<T extends Spell> (
         return traits.applyTo(type.getDefualtStack());
     }
 
-    public void appendTooltip(List<Text> lines) {
+    @Override
+    public void appendTooltip(TooltipContext context, Consumer<Text> tooltip, TooltipType type) {
         MutableText lore = Text.translatable(type().getTranslationKey() + ".lore").formatted(type().getAffinity().getColor());
 
         if (!InteractionManager.getInstance().getClientSpecies().canCast()) {
             lore = lore.formatted(Formatting.OBFUSCATED);
         }
-        lines.addAll(TextHelper.wrap(lore, 180).toList());
+        TextHelper.wrap(lore, 180).forEach(tooltip);
         float corruption = ((int)traits().getCorruption() * 10) + type().getAffinity().getCorruption();
         List<Text> modifiers = new ArrayList<>();
-        type.getTooltip().appendTooltip(this, modifiers);
+        type().getTooltip().appendTooltip(this, modifiers);
         if (corruption != 0) {
             modifiers.add(EffectUtils.formatModifierChange("affinity.unicopia.corruption", corruption, true));
         }
         if (!modifiers.isEmpty()) {
-            lines.add(Text.empty());
+            tooltip.accept(Text.empty());
-            lines.add(Text.translatable("affinity.unicopia.when_cast").formatted(Formatting.GRAY));
+            tooltip.accept(Text.translatable("affinity.unicopia.when_cast").formatted(Formatting.GRAY));
-            lines.addAll(modifiers);
+            modifiers.forEach(tooltip);
         }
-
     }
 
     public TypedActionResult<CustomisedSpellType<?>> toAction() {

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/SpellType.java

@@ -18,6 +18,7 @@ import com.minelittlepony.unicopia.ability.magic.spell.ThrowableSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.TimeControlAbilitySpell;
 import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
+import com.minelittlepony.unicopia.item.EnchantableItem;
 import com.minelittlepony.unicopia.item.GemstoneItem;
 import com.minelittlepony.unicopia.item.UItems;
 import com.minelittlepony.unicopia.util.RegistryUtils;
@@ -117,7 +118,7 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
         this.traits = traits;
         this.stackable = stackable;
         traited = new CustomisedSpellType<>(this, traits, SpellTraits::empty);
-        defaultStack = UItems.GEMSTONE.getDefaultStack(this);
+        defaultStack = EnchantableItem.enchant(UItems.GEMSTONE.getDefaultStack(), this);
     }
 
     public boolean isObtainable() {

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/trait/TraitDiscovery.java

@@ -9,8 +9,6 @@ import java.util.Optional;
 import java.util.Set;
 import java.util.stream.Stream;
 
-import org.jetbrains.annotations.Nullable;
-
 import com.minelittlepony.unicopia.advancement.UCriteria;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.network.Channel;
@@ -33,7 +31,6 @@ import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
 import net.minecraft.registry.Registries;
 import net.minecraft.registry.RegistryWrapper.WrapperLookup;
-import net.minecraft.world.World;
 
 public class TraitDiscovery implements NbtSerialisable, Copyable<TraitDiscovery> {
     private final Set<Trait> unreadTraits = new HashSet<>();
@@ -114,7 +111,7 @@ public class TraitDiscovery implements NbtSerialisable, Copyable<TraitDiscovery>
     }
 
     @Environment(EnvType.CLIENT)
-    public void appendTooltip(ItemStack stack, @Nullable World world, List<Text> tooltip) {
+    public void appendTooltip(ItemStack stack, List<Text> tooltip) {
         SpellTraits.getEmbeddedTraits(stack)
             .orElseGet(() -> getKnownTraits(stack.getItem()))
             .appendTooltip(tooltip);

src/main/java/com/minelittlepony/unicopia/client/ModifierTooltipRenderer.java

@@ -1,146 +1,52 @@
 package com.minelittlepony.unicopia.client;
 
 import java.util.List;
+import java.util.function.Consumer;
+
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.unicopia.diet.PonyDiets;
 import com.minelittlepony.unicopia.entity.player.Pony;
-import net.fabricmc.fabric.api.client.item.v1.ItemTooltipCallback;
+import com.minelittlepony.unicopia.item.EnchantableItem;
-import net.minecraft.client.MinecraftClient;
+import com.minelittlepony.unicopia.item.GlowableItem;
+import com.minelittlepony.unicopia.item.component.UDataComponentTypes;
+
+import net.minecraft.component.ComponentType;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipAppender;
 import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
 
-public class ModifierTooltipRenderer implements ItemTooltipCallback {
+public class ModifierTooltipRenderer {
+    public static final ModifierTooltipRenderer INSTANCE = new ModifierTooltipRenderer();
 
-    @Override
+    public void getTooltip(ItemStack stack, Item.TooltipContext context, @Nullable PlayerEntity player, TooltipType type, List<Text> lines) {
-    public void getTooltip(ItemStack stack, Item.TooltipContext tooltipContext, TooltipType tooltipType, List<Text> lines) {
+        @Nullable
+        Pony pony = Pony.of(player);
 
-        // TODO: Evaluate if we still need this
+        if (pony != null) {
-        /*int flags = stack.hasNbt() && stack.getNbt().contains("HideFlags", 99) ? stack.getNbt().getInt("HideFlags") : 0;
+            pony.getDiscoveries().appendTooltip(stack, lines);
-
-        if (isShowing(flags, ItemStack.TooltipSection.MODIFIERS)) {
-
-            Enchantment s;
-            Map<EquipmentSlot, Multimap<EntityAttribute, EntityAttributeModifier>> modifiers = new HashMap<>();
-
-            Equine.<PlayerEntity, Pony>of(MinecraftClient.getInstance().player).ifPresent(eq -> {
-                getEnchantments(stack).filter(p -> p.getRight() instanceof AttributedEnchantment).forEach(pair -> {
-                    ((AttributedEnchantment)pair.getRight()).getModifiers(eq, pair.getLeft(), modifiers);
-                });
-            });
-
-            modifiers.forEach((slot, modifs) -> {
-
-                List<Text> newLines = new ArrayList<>();
-
-                modifs.entries().stream()
-                    .filter(entry -> entry.getKey().equals(EntityAttributes.GENERIC_MOVEMENT_SPEED) || UEntityAttributes.REGISTRY.contains(entry.getKey()))
-                    .forEach(entry -> describeModifiers(entry.getKey(), entry.getValue(), null, newLines));
-
-                if (!newLines.isEmpty()) {
-                    Text find = Text.translatable("item.modifiers." + slot.getName()).formatted(Formatting.GRAY);
-                    int insertPosition = getInsertPosition(stack, find, flags, lines, tooltipType.isAdvanced());
-                    if (insertPosition == -1) {
-                        lines.add(ScreenTexts.EMPTY);
-                        lines.add(find);
-                        lines.addAll(newLines);
-                    } else {
-                        lines.addAll(insertPosition, newLines);
-                    }
-                }
-            });
-        }*/
-
-        if (MinecraftClient.getInstance().player != null) {
-            Pony.of(MinecraftClient.getInstance().player).getDiscoveries().appendTooltip(stack, MinecraftClient.getInstance().world, lines);
-        }
-    }
-/*
-    private int getInsertPosition(ItemStack stack, Text category, int flags, List<Text> lines, boolean advanced) {
-        int insertPosition = lines.indexOf(category);
-
-        if (insertPosition > -1) {
-            return insertPosition + 1;
         }
 
-        if (insertPosition == -1 && stack.hasNbt()) {
+        Consumer<Text> textConsumer = lines::add;
-            if (isShowing(flags, ItemStack.TooltipSection.MODIFIERS) && stack.getNbt().getBoolean("Unbreakable")) {
+
-                insertPosition = checkFor(lines, Text.translatable("item.unbreakable").formatted(Formatting.BLUE));
+        appendTooltip(stack, UDataComponentTypes.CHARGES, context, textConsumer, type);
+        appendTooltip(stack, UDataComponentTypes.ISSUER, context, textConsumer, type);
+        EnchantableItem.getSpellEffect(stack).appendTooltip(context, textConsumer, type);
+        if (GlowableItem.isGlowing(stack)) {
+            lines.add(Text.translatable("item.unicopia.friendship_bracelet.glowing").formatted(Formatting.ITALIC, Formatting.GRAY));
         }
 
-            if (insertPosition == -1 && isShowing(flags, ItemStack.TooltipSection.CAN_DESTROY) && stack.getNbt().contains("CanDestroy", 9)) {
+        PonyDiets.getInstance().getDiet(pony).appendTooltip(stack, pony, lines, type);
-                insertPosition = checkFor(lines, Text.translatable("item.canBreak").formatted(Formatting.GRAY));
     }
 
-            if (insertPosition == -1 && isShowing(flags, ItemStack.TooltipSection.CAN_PLACE) && stack.getNbt().contains("CanPlaceOn", 9)) {
+    private <T extends TooltipAppender> void appendTooltip(ItemStack stack, ComponentType<T> componentType, Item.TooltipContext context, Consumer<Text> textConsumer, TooltipType type) {
-                insertPosition = checkFor(lines, Text.translatable("item.canPlace").formatted(Formatting.GRAY));
+        T tooltipAppender = stack.get(componentType);
+        if (tooltipAppender != null) {
+            tooltipAppender.appendTooltip(context, textConsumer, type);
         }
     }
-
-        if (insertPosition == -1 && advanced) {
-           if (stack.isDamaged()) {
-               insertPosition = checkFor(lines, Text.translatable("item.durability", stack.getMaxDamage() - stack.getDamage(), stack.getMaxDamage()));
-           } else {
-               insertPosition = checkFor(lines, Text.literal(Registries.ITEM.getId(stack.getItem()).toString()).formatted(Formatting.DARK_GRAY));
-           }
-        }
-
-        return insertPosition;
-    }
-
-    private int checkFor(List<Text> lines, Text category) {
-        return lines.indexOf(category);
-    }
-
-    private void describeModifiers(RegistryEntry<EntityAttribute> attribute, EntityAttributeModifier modifier, @Nullable PlayerEntity player, List<Text> lines) {
-        double value = modifier.value();
-        boolean baseAdjusted = false;
-        if (player != null) {
-            value += player.getAttributeBaseValue(attribute);
-            baseAdjusted = true;
-        }
-
-        Operation op = modifier.operation();
-
-        double displayValue;
-        if (op != EntityAttributeModifier.Operation.ADD_MULTIPLIED_BASE && op != EntityAttributeModifier.Operation.ADD_MULTIPLIED_TOTAL) {
-            displayValue = value;
-        } else {
-            displayValue = value * 100;
-        }
-
-        if (baseAdjusted) {
-            lines.add(Text.literal(" ").append(getModifierLineBase("equals", displayValue, op, attribute, Formatting.DARK_GREEN)));
-        } else if (value > 0) {
-            lines.add(getModifierLineBase("plus", displayValue, op, attribute, attribute == UEntityAttributes.ENTITY_GRAVITY_MODIFIER ? Formatting.RED : Formatting.BLUE));
-        } else if (value < 0) {
-            lines.add(getModifierLineBase("take", -displayValue, op, attribute, attribute == UEntityAttributes.ENTITY_GRAVITY_MODIFIER ? Formatting.BLUE : Formatting.RED));
-        }
-    }
-
-    private Text getModifierLineBase(String root, double displayValue, Operation op, EntityAttribute attribute, Formatting color) {
-        return Text.translatable("attribute.modifier." + root + "." + op.getId(),
-                ItemStack.MODIFIER_FORMAT.format(displayValue),
-                Text.translatable(attribute.getTranslationKey())
-            ).formatted(color);
-    }
-
-
-    private static boolean isShowing(int flags, ItemStack.TooltipSection section) {
-        return (flags & section.getFlag()) == 0;
-    }
-
-    private static Stream<Pair<Integer, Enchantment>> getEnchantments(ItemStack stack) {
-        if (!stack.isEmpty()) {
-            return stack.getEnchantments()
-                    .stream()
-                    .map(t -> (NbtCompound)t)
-                    .map(tag -> Registries.ENCHANTMENT.getOrEmpty(Identifier.tryParse(tag.getString("id")))
-                                .map(ench -> new Pair<>(tag.getInt("lvl"), ench)))
-                    .filter(Optional::isPresent)
-                    .map(Optional::get);
-        }
-
-        return Stream.empty();
-    }
-*/
 }

src/main/java/com/minelittlepony/unicopia/client/UnicopiaClient.java

@@ -27,7 +27,6 @@ import com.minelittlepony.unicopia.util.Lerp;
 
 import net.fabricmc.api.ClientModInitializer;
 import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
-import net.fabricmc.fabric.api.client.item.v1.ItemTooltipCallback;
 import net.fabricmc.fabric.api.resource.ResourceManagerHelper;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.gui.screen.OpenToLanScreen;
@@ -145,7 +144,6 @@ public class UnicopiaClient implements ClientModInitializer {
         ClientTickEvents.END_CLIENT_TICK.register(this::onTick);
         ClientTickEvents.END_WORLD_TICK.register(this::onWorldTick);
         ScreenInitCallback.EVENT.register(this::onScreenInit);
-        ItemTooltipCallback.EVENT.register(new ModifierTooltipRenderer());
 
         ResourceManagerHelper.get(ResourceType.CLIENT_RESOURCES).registerReloadListener(ViewportShader.INSTANCE);
         ResourceManagerHelper.get(ResourceType.CLIENT_RESOURCES).registerReloadListener(SpellEffectsRenderDispatcher.INSTANCE);

src/main/java/com/minelittlepony/unicopia/client/gui/DismissSpellScreen.java

@@ -19,6 +19,8 @@ import net.minecraft.client.gui.*;
 import net.minecraft.client.gui.screen.narration.NarrationMessageBuilder;
 import net.minecraft.client.sound.PositionedSoundInstance;
 import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.item.Item.TooltipContext;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.screen.ScreenTexts;
 import net.minecraft.text.MutableText;
 import net.minecraft.text.Text;
@@ -205,7 +207,7 @@ public class DismissSpellScreen extends GameGui {
                 tooltip.add(Text.translatable("gui.unicopia.dispell_screen.spell_type", name));
                 type.traits().appendTooltip(tooltip);
                 tooltip.add(ScreenTexts.EMPTY);
-                type.appendTooltip(tooltip);
+                type.appendTooltip(TooltipContext.create(client.world), tooltip::add, TooltipType.BASIC);
                 tooltip.add(ScreenTexts.EMPTY);
                 if (spell instanceof TimedSpell timed) {
                     tooltip.add(ScreenTexts.EMPTY);

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/SpellbookScreen.java

@@ -32,6 +32,8 @@ import net.minecraft.client.gui.screen.recipebook.RecipeBookWidget;
 import net.minecraft.client.render.GameRenderer;
 import net.minecraft.client.util.math.MatrixStack;
 import net.minecraft.entity.player.PlayerInventory;
+import net.minecraft.item.Item.TooltipContext;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.screen.slot.Slot;
 import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
@@ -209,7 +211,7 @@ public class SpellbookScreen extends HandledScreen<SpellbookScreenHandler> imple
 
         List<Text> tooltip = new ArrayList<>();
         tooltip.add(spell.type().getName());
-        spell.appendTooltip(tooltip);
+        spell.appendTooltip(TooltipContext.create(client.world), tooltip::add, TooltipType.BASIC);
 
         context.drawTooltip(textRenderer, tooltip, x, y);
         context.getMatrices().pop();

src/main/java/com/minelittlepony/unicopia/compat/emi/Main.java

@@ -103,11 +103,10 @@ public class Main implements EmiPlugin {
                 .filter(recipe -> recipe.value() instanceof SpellShapedCraftingRecipe)
                 .forEach(recipe -> {
             ItemStack output = recipe.value().getResult(registries);
-            if (output.getItem() instanceof MultiItem multiItem && output.getItem() instanceof EnchantableItem enchantable) {
+            if (output.getItem() instanceof MultiItem multiItem) {
                 multiItem.getDefaultStacks().forEach(outputVariation -> {
-                    var spellEffect = enchantable.getSpellEffect(outputVariation);
+                    if (EnchantableItem.isEnchanted(outputVariation)) {
-                    if (!spellEffect.isEmpty()) {
+                        registry.addRecipe(new MagicalShapedEmiRecipe(recipe, EnchantableItem.getSpellEffect(outputVariation), outputVariation));
-                        registry.addRecipe(new MagicalShapedEmiRecipe(recipe, spellEffect, outputVariation));
                     }
                 });
             }

src/main/java/com/minelittlepony/unicopia/diet/DietProfile.java

@@ -11,14 +11,12 @@ import java.util.stream.Collectors;
 
 import org.jetbrains.annotations.Nullable;
 import com.minelittlepony.unicopia.entity.player.Pony;
-import com.minelittlepony.unicopia.item.ItemDuck;
 import com.mojang.datafixers.util.Pair;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import net.minecraft.component.DataComponentTypes;
 import net.minecraft.component.type.FoodComponent;
-import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
 import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.network.RegistryByteBuf;
@@ -80,7 +78,7 @@ public record DietProfile(
     }
 
     static boolean isForaged(ItemStack stack) {
-        return ((ItemDuck)stack.getItem()).getOriginalFoodComponent().isEmpty();
+        return stack.getComponents().get(DataComponentTypes.FOOD) == null;
     }
 
     @Nullable
@@ -125,10 +123,17 @@ public record DietProfile(
         return Pair.of(hungerMultiplier, saturationMultiplier);
     }
 
-    public void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipType context) {
+    public void appendTooltip(ItemStack stack, @Nullable Pony pony, List<Text> tooltip, TooltipType context) {
-        var food = stack.get(DataComponentTypes.FOOD);
+        if (this == EMPTY) {
+            return;
+        }
 
+        tooltip.add(Text.translatable("unicopia.diet.information").formatted(Formatting.DARK_PURPLE));
+        findEffect(stack).orElseGet(() -> PonyDiets.getInstance().getEffects(stack)).appendTooltip(stack, tooltip, context);
+
+        var food = stack.get(DataComponentTypes.FOOD);
         var ratios = getRatios(stack);
+
         if (food == null || isInedible(ratios)) {
             if (stack.getUseAction() != UseAction.DRINK) {
                 tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.not_edible")).formatted(Formatting.DARK_GRAY));
@@ -139,7 +144,7 @@ public record DietProfile(
         float baseMultiplier = (isForaged(stack) ? foragingMultiplier() : defaultMultiplier());
 
         if (context.isAdvanced()) {
-            var nonAdjustedFood = getNonAdjustedFoodComponent(stack, user).orElse(food);
+            var nonAdjustedFood = getNonAdjustedFoodComponent(stack, pony).orElse(food);
             tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.base_multiplier", baseMultiplier).formatted(Formatting.DARK_GRAY)));
             tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.hunger.detailed", food.nutrition(), nonAdjustedFood.nutrition(), (int)(ratios.getFirst() * 100))).formatted(Formatting.DARK_GRAY));
             tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.saturation.detailed", food.saturation(), nonAdjustedFood.saturation(), (int)(ratios.getSecond() * 100))).formatted(Formatting.DARK_GRAY));
@@ -149,18 +154,20 @@ public record DietProfile(
         }
     }
 
-    private Optional<FoodComponent> getNonAdjustedFoodComponent(ItemStack stack, @Nullable PlayerEntity user) {
+    private Optional<FoodComponent> getNonAdjustedFoodComponent(ItemStack stack, @Nullable Pony pony) {
-        @Nullable
+        FoodComponent food = stack.getComponents().get(DataComponentTypes.FOOD);
-        Pony pony = Pony.of(user);
-        Optional<FoodComponent> food = ((ItemDuck)stack.getItem()).getOriginalFoodComponent();
 
-        if (food.isEmpty() && pony.getObservedSpecies().hasIronGut()) {
+        if (food != null) {
+            return Optional.ofNullable(food);
+        }
+
+        if (pony != null && pony.getObservedSpecies().hasIronGut()) {
             return findEffect(stack)
                 .flatMap(Effect::foodComponent)
                 .or(() -> PonyDiets.getInstance().getEffects(stack).foodComponent());
         }
 
-        return food;
+        return Optional.empty();
     }
 
     public record Multiplier(

src/main/java/com/minelittlepony/unicopia/diet/DietView.java

@@ -1,13 +1,8 @@
 package com.minelittlepony.unicopia.diet;
 
-import java.util.List;
-import org.jetbrains.annotations.Nullable;
-
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.item.tooltip.TooltipType;
-import net.minecraft.text.Text;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
 import net.minecraft.world.World;
@@ -16,12 +11,4 @@ public interface DietView {
     TypedActionResult<ItemStack> startUsing(ItemStack stack, World world, PlayerEntity user, Hand hand);
 
     void finishUsing(ItemStack stack, World world, LivingEntity entity);
-
-    void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipType context);
-
-    interface Holder {
-        default DietView getDiets(ItemStack stack) {
-            return PonyDiets.getInstance();
-        }
-    }
 }

src/main/java/com/minelittlepony/unicopia/diet/PonyDiets.java

@@ -1,7 +1,6 @@
 package com.minelittlepony.unicopia.diet;
 
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Optional;
 import org.jetbrains.annotations.Nullable;
@@ -9,19 +8,14 @@ import org.jetbrains.annotations.Nullable;
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.entity.effect.FoodPoisoningStatusEffect;
 import com.minelittlepony.unicopia.entity.player.Pony;
-import com.minelittlepony.unicopia.item.ItemDuck;
 import com.minelittlepony.unicopia.util.serialization.PacketCodecUtils;
 
-import net.minecraft.component.DataComponentTypes;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.network.RegistryByteBuf;
 import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.network.codec.PacketCodecs;
-import net.minecraft.text.Text;
-import net.minecraft.util.Formatting;
 import net.minecraft.util.Hand;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.TypedActionResult;
@@ -57,11 +51,11 @@ public class PonyDiets implements DietView {
         this.effects = effects;
     }
 
-    private DietProfile getDiet(Pony pony) {
+    public DietProfile getDiet(Pony pony) {
         return Optional.ofNullable(diets.get(pony.getObservedSpecies())).orElse(DietProfile.EMPTY);
     }
 
-    Effect getEffects(ItemStack stack) {
+    public Effect getEffects(ItemStack stack) {
         return effects.values().stream().filter(effect -> effect.test(stack)).findFirst().map(Effect.class::cast).orElse(Effect.EMPTY);
     }
 
@@ -71,50 +65,11 @@ public class PonyDiets implements DietView {
 
     @Override
     public TypedActionResult<ItemStack> startUsing(ItemStack stack, World world, PlayerEntity user, Hand hand) {
-        return initEdibility(stack, user)
+        return FoodPoisoningStatusEffect.apply(stack, user);
-                ? FoodPoisoningStatusEffect.apply(stack, user)
-                : TypedActionResult.fail(stack);
     }
 
     @Override
     public void finishUsing(ItemStack stack, World world, LivingEntity entity) {
-        if (initEdibility(stack, entity)) {
         Pony.of(entity).ifPresent(pony -> getEffects(stack, pony).ailment().effects().afflict(pony.asEntity(), stack));
     }
 }
-
-    @Override
-    public void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipType context) {
-
-        if (initEdibility(stack, user)) {
-            if (!((ItemDuck)stack.getItem()).getOriginalFoodComponent().isEmpty() || stack.contains(DataComponentTypes.FOOD)) {
-                Pony pony = Pony.of(user);
-
-                tooltip.add(Text.translatable("unicopia.diet.information").formatted(Formatting.DARK_PURPLE));
-                getEffects(stack, pony).appendTooltip(stack, tooltip, context);
-                getDiet(pony).appendTooltip(stack, user, tooltip, context);
-            }
-        }
-    }
-
-    private boolean initEdibility(ItemStack stack, LivingEntity user) {
-        ItemDuck item = (ItemDuck)stack.getItem();
-        item.resetFoodComponent();
-        return Pony.of(user).filter(pony -> {
-            DietProfile diet = getDiet(pony);
-
-            if (!stack.contains(DataComponentTypes.FOOD) && pony.getObservedSpecies().hasIronGut()) {
-                diet.findEffect(stack)
-                    .flatMap(Effect::foodComponent)
-                    .or(() -> getEffects(stack).foodComponent())
-                    .ifPresent(item::setFoodComponent);
-            }
-
-            if (stack.contains(DataComponentTypes.FOOD)) {
-                item.setFoodComponent(diet.getAdjustedFoodComponent(stack));
-            }
-
-            return true;
-        }).isPresent();
-    }
-}

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

@@ -41,7 +41,6 @@ public class AmuletItem extends WearableItem {
 
     @Override
     public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> list, TooltipType type) {
-
         for (StringVisitable line : MinecraftClient.getInstance().textRenderer.getTextHandler().wrapLines(
                 Text.translatable(getTranslationKey(stack) + ".lore"), 150, Style.EMPTY)) {
             MutableText compiled = Text.literal("").formatted(Formatting.ITALIC, Formatting.GRAY);
@@ -51,8 +50,7 @@ public class AmuletItem extends WearableItem {
             });
             list.add(compiled);
         }
-
+        super.appendTooltip(stack, context, list, type);
-        Charges.of(stack).appendTooltip(context, list::add, type);
     }
 
     @Override

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

@@ -1,6 +1,5 @@
 package com.minelittlepony.unicopia.item;
 
-import java.util.List;
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.entity.Creature;
@@ -22,10 +21,8 @@ import net.minecraft.entity.mob.MobEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.particle.ParticleEffect;
 import net.minecraft.particle.ParticleTypes;
-import net.minecraft.text.Text;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
@@ -43,11 +40,6 @@ public class BellItem extends Item {
         return UseAction.BOW;
     }
 
-    @Override
-    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> list, TooltipType type) {
-        Charges.of(stack).appendTooltip(context, list::add, type);
-    }
-
     @Override
     public int getMaxUseTime(ItemStack stack, LivingEntity user) {
         return 3000;

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

@@ -19,12 +19,7 @@ import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
 
 public interface EnchantableItem extends ItemConvertible {
-
+    static CustomisedSpellType<?> getSpellEffect(ItemStack stack) {
-    default ItemStack getDefaultStack(SpellType<?> spell) {
-        return enchant(asItem().getDefaultStack(), spell);
-    }
-
-    default CustomisedSpellType<?> getSpellEffect(ItemStack stack) {
         return EnchantableItem.getSpellKey(stack).withTraits(SpellTraits.of(stack));
     }
 

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

@@ -102,7 +102,6 @@ public class EnchantedStaffItem extends StaffItem implements EnchantableItem, Mu
             SpellType<?> key = EnchantableItem.getSpellKey(stack);
             lines.add(Text.translatable(key.getTranslationKey()).formatted(key.getAffinity().getColor()));
         }
-        Charges.of(stack).appendTooltip(context, lines::add, type);
     }
 
     @Override
@@ -144,7 +143,7 @@ public class EnchantedStaffItem extends StaffItem implements EnchantableItem, Mu
                     Pony.of(entity).ifPresent(pony -> {
                         pony.subtractEnergyCost(4);
                         stack.damage(1, pony.asEntity(), EquipmentSlot.MAINHAND);
-                        getSpellEffect(stack).create().toThrowable().throwProjectile(pony);
+                        EnchantableItem.getSpellEffect(stack).create().toThrowable().throwProjectile(pony);
                         pony.setAnimation(Animation.ARMS_UP, Animation.Recipient.ANYONE, 10);
                     });
                 }
@@ -153,7 +152,7 @@ public class EnchantedStaffItem extends StaffItem implements EnchantableItem, Mu
                     Pony.of(entity).ifPresent(pony -> {
                         pony.subtractEnergyCost(4);
                         stack.damage(1, pony.asEntity(), EquipmentSlot.MAINHAND);
-                        getSpellEffect(stack).create().toThrowable().throwProjectile(pony);
+                        EnchantableItem.getSpellEffect(stack).create().toThrowable().throwProjectile(pony);
                         pony.setAnimation(Animation.ARMS_UP, Animation.Recipient.ANYONE, 10);
                     });
                 }
@@ -166,7 +165,7 @@ public class EnchantedStaffItem extends StaffItem implements EnchantableItem, Mu
         if (attacker.isSneaking() && Charges.discharge(stack, 1)) {
             stack.damage(50, attacker, EquipmentSlot.MAINHAND);
             Caster.of(attacker).ifPresent(c -> c.subtractEnergyCost(4));
-            Caster.of(target).ifPresent(c -> getSpellEffect(stack).apply(c, CastingMethod.STAFF));
+            Caster.of(target).ifPresent(c -> EnchantableItem.getSpellEffect(stack).apply(c, CastingMethod.STAFF));
         }
 
         return false;
@@ -193,7 +192,7 @@ public class EnchantedStaffItem extends StaffItem implements EnchantableItem, Mu
                     living.clearActiveItem();
                     living.damage(entity.getDamageSources().magic(), 1);
                     if (EnchantableItem.isEnchanted(stack) && Charges.discharge(stack, 1)) {
-                        Caster.of(entity).ifPresent(c -> getSpellEffect(stack).apply(c, CastingMethod.STAFF));
+                        Caster.of(entity).ifPresent(c -> EnchantableItem.getSpellEffect(stack).apply(c, CastingMethod.STAFF));
                     }
                 }
             }

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

@@ -1,6 +1,5 @@
 package com.minelittlepony.unicopia.item;
 
-import java.util.List;
 import java.util.UUID;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
@@ -15,19 +14,13 @@ import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
 import com.minelittlepony.unicopia.entity.AmuletSelectors;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.component.Issuer;
-import com.minelittlepony.unicopia.item.component.UDataComponentTypes;
-
-import net.fabricmc.api.EnvType;
-import net.fabricmc.api.Environment;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EquipmentSlot;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.stat.Stats;
-import net.minecraft.text.Text;
 import net.minecraft.util.*;
 import net.minecraft.world.World;
 
@@ -69,18 +62,6 @@ public class FriendshipBraceletItem extends WearableItem {
         return super.use(world, player, hand);
     }
 
-    @Override
-    @Environment(EnvType.CLIENT)
-    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> lines, TooltipType type) {
-        super.appendTooltip(stack, context, lines, type);
-        if (Issuer.isSigned(stack)) {
-            stack.get(UDataComponentTypes.ISSUER).appendTooltip(context, lines::add, type);
-        }
-        if (GlowableItem.isGlowing(stack)) {
-            lines.add(Text.translatable("item.unicopia.friendship_bracelet.glowing").formatted(Formatting.ITALIC, Formatting.GRAY));
-        }
-    }
-
     @Override
     public EquipmentSlot getSlotType(ItemStack stack) {
         return Issuer.isSigned(stack) ? EquipmentSlot.CHEST : super.getSlotType(stack);

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

@@ -14,13 +14,12 @@ import com.minelittlepony.unicopia.item.group.MultiItem;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.text.Text;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
 import net.minecraft.world.World;
 
-public class GemstoneItem extends Item implements MultiItem, EnchantableItem {
+public class GemstoneItem extends Item implements MultiItem {
 
     public GemstoneItem(Settings settings) {
         super(settings);
@@ -71,15 +70,6 @@ public class GemstoneItem extends Item implements MultiItem, EnchantableItem {
         return result;
     }
 
-    @Override
-    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> lines, TooltipType type) {
-        super.appendTooltip(stack, context, lines, type);
-
-        if (EnchantableItem.isEnchanted(stack)) {
-            getSpellEffect(stack).appendTooltip(lines);
-        }
-    }
-
     @Override
     public List<ItemStack> getDefaultStacks() {
         return SpellType.REGISTRY.stream()

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

@@ -1,24 +1,7 @@
 package com.minelittlepony.unicopia.item;
 
-import java.util.Optional;
-
-import com.minelittlepony.unicopia.diet.DietView;
 import com.minelittlepony.unicopia.entity.ItemImpl;
-
-import net.minecraft.component.type.FoodComponent;
 import net.minecraft.item.*;
 
-public interface ItemDuck extends ItemConvertible, ItemImpl.TickableItem, DietView.Holder {
+public interface ItemDuck extends ItemConvertible, ItemImpl.TickableItem {
-    @Deprecated
-    void setFoodComponent(FoodComponent food);
-
-    // TODO: Inject into Item.Settings::getComponents and return our own implementation of ComponentMap to handle food component overrides
-    // ItemStack(ComponentMapImpl(UnicopiaComponentMap(ItemComponentMap()), Changes))
-    @Deprecated
-    Optional<FoodComponent> getOriginalFoodComponent();
-
-    @Deprecated
-    default void resetFoodComponent() {
-        setFoodComponent(getOriginalFoodComponent().orElse(null));
-    }
 }

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

@@ -0,0 +1,20 @@
+package com.minelittlepony.unicopia.item;
+
+import com.minelittlepony.unicopia.item.component.TransientComponentMap;
+
+import net.minecraft.component.ComponentHolder;
+import net.minecraft.item.ItemStack;
+
+public interface ItemStackDuck extends ComponentHolder, TransientComponentMap.Holder {
+    default ItemDuck getItemDuck() {
+        return (ItemDuck)((ItemStack)(Object)this).getItem();
+    }
+
+    static ItemStackDuck of(ItemStack stack) {
+        return (ItemStackDuck)(Object)stack;
+    }
+
+    static boolean isItemStack(Object o) {
+        return o instanceof ItemStackDuck;
+    }
+}

src/main/java/com/minelittlepony/unicopia/item/component/TransientComponentMap.java

@@ -0,0 +1,91 @@
+package com.minelittlepony.unicopia.item.component;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+import java.util.function.BiFunction;
+
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.unicopia.diet.DietProfile;
+import com.minelittlepony.unicopia.diet.Effect;
+import com.minelittlepony.unicopia.diet.PonyDiets;
+import com.minelittlepony.unicopia.entity.player.Pony;
+import com.minelittlepony.unicopia.item.ItemStackDuck;
+
+import net.minecraft.component.ComponentType;
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.entity.Entity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.Util;
+
+public class TransientComponentMap {
+    private static final BiFunction<ItemStack, ?, ?> DEFAULT = (stack, t) -> t;
+    public static final TransientComponentMap INITIAL = Util.make(new TransientComponentMap(), map -> {
+        map.set(UDataComponentTypes.DIET_PROFILE, (s, original) -> {
+            if (original != null) {
+                return original;
+            }
+            return ItemStackDuck.of(s).getTransientComponents().getCarrier()
+                    .flatMap(Pony::of)
+                    .map(pony -> PonyDiets.getInstance().getDiet(pony))
+                    .orElse(DietProfile.EMPTY);
+        });
+        map.set(DataComponentTypes.FOOD, (s, originalFood) -> {
+            DietProfile diet = s.get(UDataComponentTypes.DIET_PROFILE);
+
+            if (diet == null) {
+                return originalFood;
+            }
+
+            if (originalFood != null) {
+                return diet.getAdjustedFoodComponent(s);
+            }
+
+            if (ItemStackDuck.of(s).getTransientComponents().getCarrier()
+                    .flatMap(Pony::of)
+                    .filter(pony -> pony.getObservedSpecies().hasIronGut())
+                    .isPresent()) {
+                return diet.findEffect(s)
+                    .flatMap(Effect::foodComponent)
+                    .or(() -> PonyDiets.getInstance().getEffects(s).foodComponent())
+                    .orElse(originalFood);
+            }
+
+            return originalFood;
+        });
+    });
+
+    private final Map<ComponentType<?>, BiFunction<ItemStack, ?, ?>> components = new HashMap<>();
+
+    private Optional<Entity> carrier = Optional.empty();
+
+    private TransientComponentMap() {}
+
+    public Optional<Entity> getCarrier() {
+        return carrier;
+    }
+
+    public void setCarrier(@Nullable Entity carrier) {
+        this.carrier = Optional.ofNullable(carrier);
+    }
+
+    public <T> void set(ComponentType<? extends T> type, BiFunction<ItemStack, T, T> getter) {
+        components.put(type, getter);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T get(ComponentType<? extends T> type, ItemStack stack, T upstreamValue) {
+        return ((BiFunction<ItemStack, T, T>)components.getOrDefault(type, DEFAULT)).apply(stack, upstreamValue);
+    }
+
+    public TransientComponentMap createCopy() {
+        TransientComponentMap copy = new TransientComponentMap();
+        copy.components.putAll(components);
+        return copy;
+    }
+
+    public interface Holder {
+        TransientComponentMap getTransientComponents();
+    }
+}

src/main/java/com/minelittlepony/unicopia/item/component/UDataComponentTypes.java

@@ -6,6 +6,7 @@ import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.container.SpellbookState;
+import com.minelittlepony.unicopia.diet.DietProfile;
 import com.minelittlepony.unicopia.entity.mob.AirBalloonEntity;
 import com.minelittlepony.unicopia.entity.mob.ButterflyEntity;
 import com.mojang.serialization.Codec;
@@ -25,6 +26,7 @@ public interface UDataComponentTypes {
     ComponentType<Issuer> ISSUER = register("issuer", builder -> builder.codec(Issuer.CODEC).packetCodec(Issuer.PACKET_CODEC).cache());
     ComponentType<Charges> CHARGES = register("charges", builder -> builder.codec(Charges.CODEC).packetCodec(Charges.PACKET_CODEC));
     ComponentType<Appearance> APPEARANCE = register("appearance", builder -> builder.codec(Appearance.CODEC).packetCodec(Appearance.PACKET_CODEC));
+    ComponentType<DietProfile> DIET_PROFILE = register("diet_profile", builder -> builder.codec(DietProfile.CODEC).packetCodec(DietProfile.PACKET_CODEC));
 
     private static <T> ComponentType<T> register(String name, UnaryOperator<ComponentType.Builder<T>> builderOperator) {
         return Registry.register(Registries.DATA_COMPONENT_TYPE, Unicopia.id(name), builderOperator.apply(ComponentType.builder()).build());

src/main/java/com/minelittlepony/unicopia/item/enchantment/CustomEnchantableItem.java

@@ -1,10 +0,0 @@
-package com.minelittlepony.unicopia.item.enchantment;
-
-import net.minecraft.enchantment.Enchantment;
-import net.minecraft.item.ItemStack;
-import net.minecraft.registry.RegistryKey;
-
-@Deprecated
-public interface CustomEnchantableItem {
-    boolean isAcceptableEnchant(ItemStack stack, RegistryKey<Enchantment> enchantment);
-}

src/main/java/com/minelittlepony/unicopia/mixin/MixinItem.java

@@ -2,36 +2,19 @@ package com.minelittlepony.unicopia.mixin;
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Optional;
-import java.util.function.Supplier;
-
 import org.spongepowered.asm.mixin.Mixin;
-import com.google.common.base.Suppliers;
 import com.minelittlepony.unicopia.entity.ItemImpl;
 import com.minelittlepony.unicopia.entity.ItemImpl.GroundTickCallback;
 import com.minelittlepony.unicopia.item.ItemDuck;
 
-import net.minecraft.component.DataComponentTypes;
-import net.minecraft.component.type.FoodComponent;
 import net.minecraft.item.Item;
 
 @Mixin(Item.class)
 abstract class MixinItem implements ItemDuck {
     private final List<ItemImpl.GroundTickCallback> tickCallbacks = new ArrayList<>();
 
-    @Deprecated
-    private final Supplier<Optional<FoodComponent>> originalFoodComponent = Suppliers.memoize(() -> {
-        return Optional.ofNullable(((Item)(Object)this).getComponents().get(DataComponentTypes.FOOD));
-    });
-
     @Override
     public List<GroundTickCallback> getCallbacks() {
         return tickCallbacks;
     }
-
-    @Deprecated
-    @Override
-    public Optional<FoodComponent> getOriginalFoodComponent() {
-        return originalFoodComponent.get();
-    }
 }

src/main/java/com/minelittlepony/unicopia/mixin/MixinItemStack.java

@@ -1,37 +1,89 @@
 package com.minelittlepony.unicopia.mixin;
 
+import java.util.List;
+import java.util.function.Consumer;
+
+import org.jetbrains.annotations.Nullable;
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 
-import com.minelittlepony.unicopia.diet.DietView;
+import com.minelittlepony.unicopia.diet.PonyDiets;
 import com.minelittlepony.unicopia.item.DamageChecker;
-
+import com.minelittlepony.unicopia.item.ItemStackDuck;
+import com.minelittlepony.unicopia.item.component.TransientComponentMap;
+import net.minecraft.component.ComponentType;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.damage.DamageSource;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipAppender;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.text.Text;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
 import net.minecraft.world.World;
 
 @Mixin(ItemStack.class)
-abstract class MixinItemStack {
+abstract class MixinItemStack implements ItemStackDuck {
+    private final TransientComponentMap transientComponents = TransientComponentMap.INITIAL.createCopy();
+
+    @Shadow
+    abstract <T extends TooltipAppender> void appendTooltip(
+        ComponentType<T> componentType, Item.TooltipContext context, Consumer<Text> textConsumer, TooltipType type
+    );
+
+    @Override
+    public TransientComponentMap getTransientComponents() {
+        return transientComponents;
+    }
+
     @Inject(method = "use", at = @At("HEAD"), cancellable = true)
     private void onUse(World world, PlayerEntity user, Hand hand, CallbackInfoReturnable<TypedActionResult<ItemStack>> info) {
-        ItemStack self = (ItemStack)(Object)this;
+        transientComponents.setCarrier(user);
-        TypedActionResult<ItemStack> result = ((DietView.Holder)self.getItem()).getDiets(self).startUsing(self, world, user, hand);
+        TypedActionResult<ItemStack> result = PonyDiets.getInstance().startUsing((ItemStack)(Object)this, world, user, hand);
         if (result.getResult() != ActionResult.PASS) {
             info.setReturnValue(result);
         }
     }
 
+    @Inject(method = "onStoppedUsing", at = @At("RETURN"))
+    public void onOnStoppedUsing(World world, LivingEntity user, int remainingUseTicks, CallbackInfo info) {
+        transientComponents.setCarrier(null);
+    }
+
     @Inject(method = "finishUsing", at = @At("HEAD"))
-    private void onFinishUsing(World world, LivingEntity user, CallbackInfoReturnable<ItemStack> info) {
+    private void beforeFinishUsing(World world, LivingEntity user, CallbackInfoReturnable<ItemStack> info) {
-        ItemStack self = (ItemStack)(Object)this;
+        transientComponents.setCarrier(user);
-        ((DietView.Holder)self.getItem()).getDiets(self).finishUsing(self, world, user);
+        PonyDiets.getInstance().finishUsing((ItemStack)(Object)this, world, user);
+    }
+
+    @Inject(method = "finishUsing", at = @At("RETURN"))
+    private void afterFinishUsing(World world, LivingEntity user, CallbackInfoReturnable<ItemStack> info) {
+        transientComponents.setCarrier(null);
+    }
+
+    @Inject(method = "getTooltip", at = @At("HEAD"))
+    public void beforeGetTooltip(Item.TooltipContext context, @Nullable PlayerEntity player, TooltipType type, CallbackInfoReturnable<List<Text>> info) {
+        transientComponents.setCarrier(player);
+    }
+
+    @Inject(method = "getTooltip", at = @At("RETURN"))
+    public void afterGetTooltip(Item.TooltipContext context, @Nullable PlayerEntity player, TooltipType type, CallbackInfoReturnable<List<Text>> info) {
+        transientComponents.setCarrier(null);
+    }
+
+    @Inject(method = "getTooltip",
+            at = @At(value = "INVOKE",
+            target = "net/minecraft/item/ItemStack.appendAttributeModifiersTooltip(Ljava/util/function/Consumer;Lnet/minecraft/entity/player/PlayerEntity;)V"
+    ))
+    public void onGetTooltip(Item.TooltipContext context, @Nullable PlayerEntity player, TooltipType type, CallbackInfoReturnable<List<Text>> info) {
+
     }
 
     @Inject(method = "takesDamageFrom", at = @At("HEAD"))
@@ -41,4 +93,28 @@ abstract class MixinItemStack {
             info.setReturnValue(checker.takesDamageFrom(source));
         }
     }
+
+    @Inject(method = "get", at = @At("RETURN"))
+    private <T> void unicopia_onGet(ComponentType<? extends T> type, CallbackInfoReturnable<T> info) {
+        Object o = this;
+        if (o instanceof ItemStack stack) {
+            info.setReturnValue(ItemStackDuck.of(stack).getTransientComponents().get(type, stack, info.getReturnValue()));
+        }
+    }
+
+    @Inject(method = "getOrDefault", at = @At("RETURN"))
+    private <T> void unicopia_onGetOrDefault(ComponentType<? extends T> type, T fallback, CallbackInfoReturnable<T> info) {
+        Object o = this;
+        if (o instanceof ItemStack stack) {
+            info.setReturnValue(ItemStackDuck.of(stack).getTransientComponents().get(type, stack, info.getReturnValue()));
+        }
+    }
+
+    @Inject(method = "contains", at = @At("RETURN"))
+    private void unicopia_onContains(ComponentType<?> type, CallbackInfoReturnable<Boolean> info) {
+        Object o = this;
+        if (o instanceof ItemStack stack && ItemStackDuck.of(stack).getTransientComponents().get(type, stack, null) != null) {
+            info.setReturnValue(true);
+        }
+    }
 }

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

@@ -1,25 +0,0 @@
-package com.minelittlepony.unicopia.mixin.client;
-
-import java.util.List;
-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.CallbackInfoReturnable;
-
-import com.minelittlepony.unicopia.diet.DietView;
-import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.item.tooltip.TooltipType;
-import net.minecraft.text.Text;
-
-@Mixin(ItemStack.class)
-abstract class MixinItemStack {
-    @Inject(method = "getTooltip", at = @At("RETURN"))
-    private void onGetTooltip(Item.TooltipContext context, @Nullable PlayerEntity player, TooltipType type, CallbackInfoReturnable<List<Text>> info) {
-        ItemStack self = (ItemStack)(Object)this;
-        ((DietView.Holder)self.getItem()).getDiets(self).appendTooltip(self, player, info.getReturnValue(), type);
-    }
-}

src/main/resources/unicopia.mixin.json

@@ -94,7 +94,6 @@
     "client.MixinInGameHud",
     "client.MixinInGameHud$HeartType",
     "client.MixinItemModels",
-    "client.MixinItemStack",
     "client.MixinKeyboardInput",
     "client.MixinLivingEntityRenderer",
     "client.MixinMinecraftClient",