Code/net/minecraft/world/item/crafting/SmithingTrimRecipe.java

package net.minecraft.world.item.crafting;

import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import com.mojang.serialization.codecs.RecordCodecBuilder.Instance;
import java.util.List;
import java.util.Objects;
import java.util.Optional;
import javax.annotation.Nullable;
import net.minecraft.core.Holder;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.component.DataComponents;
import net.minecraft.network.RegistryFriendlyByteBuf;
import net.minecraft.network.codec.StreamCodec;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.world.item.crafting.display.RecipeDisplay;
import net.minecraft.world.item.crafting.display.SlotDisplay;
import net.minecraft.world.item.crafting.display.SmithingRecipeDisplay;
import net.minecraft.world.item.equipment.trim.ArmorTrim;
import net.minecraft.world.item.equipment.trim.TrimMaterial;
import net.minecraft.world.item.equipment.trim.TrimMaterials;
import net.minecraft.world.item.equipment.trim.TrimPattern;

public class SmithingTrimRecipe implements SmithingRecipe {
    final Ingredient template;
    final Ingredient base;
    final Ingredient addition;
    final Holder<TrimPattern> pattern;
    @Nullable
    private PlacementInfo placementInfo;

    public SmithingTrimRecipe(Ingredient p_391450_, Ingredient p_397854_, Ingredient p_395856_, Holder<TrimPattern> p_394316_) {
        this.template = p_391450_;
        this.base = p_397854_;
        this.addition = p_395856_;
        this.pattern = p_394316_;
    }

    public ItemStack assemble(SmithingRecipeInput p_344440_, HolderLookup.Provider p_330268_) {
        return applyTrim(p_330268_, p_344440_.base(), p_344440_.addition(), this.pattern);
    }

    public static ItemStack applyTrim(HolderLookup.Provider p_369231_, ItemStack p_368958_, ItemStack p_366218_, Holder<TrimPattern> p_393023_) {
        Optional<Holder<TrimMaterial>> optional = TrimMaterials.getFromIngredient(p_369231_, p_366218_);
        if (optional.isPresent()) {
            ArmorTrim armortrim = p_368958_.get(DataComponents.TRIM);
            ArmorTrim armortrim1 = new ArmorTrim(optional.get(), p_393023_);
            if (Objects.equals(armortrim, armortrim1)) {
                return ItemStack.EMPTY;
            } else {
                ItemStack itemstack = p_368958_.copyWithCount(1);
                itemstack.set(DataComponents.TRIM, armortrim1);
                return itemstack;
            }
        } else {
            return ItemStack.EMPTY;
        }
    }

    @Override
    public Optional<Ingredient> templateIngredient() {
        return Optional.of(this.template);
    }

    @Override
    public Ingredient baseIngredient() {
        return this.base;
    }

    @Override
    public Optional<Ingredient> additionIngredient() {
        return Optional.of(this.addition);
    }

    @Override
    public RecipeSerializer<SmithingTrimRecipe> getSerializer() {
        return RecipeSerializer.SMITHING_TRIM;
    }

    @Override
    public PlacementInfo placementInfo() {
        if (this.placementInfo == null) {
            this.placementInfo = PlacementInfo.create(List.of(this.template, this.base, this.addition));
        }

        return this.placementInfo;
    }

    @Override
    public List<RecipeDisplay> display() {
        SlotDisplay slotdisplay = this.base.display();
        SlotDisplay slotdisplay1 = this.addition.display();
        SlotDisplay slotdisplay2 = this.template.display();
        return List.of(
            new SmithingRecipeDisplay(
                slotdisplay2,
                slotdisplay,
                slotdisplay1,
                new SlotDisplay.SmithingTrimDemoSlotDisplay(slotdisplay, slotdisplay1, this.pattern),
                new SlotDisplay.ItemSlotDisplay(Items.SMITHING_TABLE)
            )
        );
    }

    public static class Serializer implements RecipeSerializer<SmithingTrimRecipe> {
        private static final MapCodec<SmithingTrimRecipe> CODEC = RecordCodecBuilder.mapCodec(
            p_390837_ -> p_390837_.group(
                    Ingredient.CODEC.fieldOf("template").forGetter(p_390832_ -> p_390832_.template),
                    Ingredient.CODEC.fieldOf("base").forGetter(p_390830_ -> p_390830_.base),
                    Ingredient.CODEC.fieldOf("addition").forGetter(p_390835_ -> p_390835_.addition),
                    TrimPattern.CODEC.fieldOf("pattern").forGetter(p_390833_ -> p_390833_.pattern)
                )
                .apply(p_390837_, SmithingTrimRecipe::new)
        );
        public static final StreamCodec<RegistryFriendlyByteBuf, SmithingTrimRecipe> STREAM_CODEC = StreamCodec.composite(
            Ingredient.CONTENTS_STREAM_CODEC,
            p_390834_ -> p_390834_.template,
            Ingredient.CONTENTS_STREAM_CODEC,
            p_390838_ -> p_390838_.base,
            Ingredient.CONTENTS_STREAM_CODEC,
            p_390831_ -> p_390831_.addition,
            TrimPattern.STREAM_CODEC,
            p_390836_ -> p_390836_.pattern,
            SmithingTrimRecipe::new
        );

        @Override
        public MapCodec<SmithingTrimRecipe> codec() {
            return CODEC;
        }

        @Override
        public StreamCodec<RegistryFriendlyByteBuf, SmithingTrimRecipe> streamCodec() {
            return STREAM_CODEC;
        }
    }
}