JEI

package net.mcreator.improveforbattle;

import net.mcreator.improveforbattle.network.ImproveForBattleModVariables;
import net.mcreator.improveforbattle.init.ImproveForBattleModItems;
import net.mcreator.improveforbattle.init.ImproveForBattleModBlocks;

import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.eventbus.api.SubscribeEvent;
import net.minecraftforge.event.world.BiomeLoadingEvent;
import net.minecraftforge.event.server.ServerStartingEvent;
import net.minecraftforge.api.distmarker.OnlyIn;
import net.minecraftforge.api.distmarker.Dist;

import mezz.jei.api.IModPlugin;
import mezz.jei.api.constants.VanillaTypes;
import mezz.jei.api.gui.IRecipeLayout;
import mezz.jei.api.gui.drawable.IDrawable;
import mezz.jei.api.gui.ingredient.IGuiItemStackGroup;
import mezz.jei.api.helpers.IGuiHelper;
import mezz.jei.api.helpers.IJeiHelpers;
import mezz.jei.api.ingredients.IIngredients;
import mezz.jei.api.recipe.category.IRecipeCategory;
import mezz.jei.api.registration.IRecipeCatalystRegistration;
import mezz.jei.api.registration.IRecipeCategoryRegistration;
import mezz.jei.api.registration.IRecipeRegistration;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.Items;
import net.minecraft.util.ResourceLocation;

import java.util.ArrayList;
import java.util.List;

@Mod.EventBusSubscriber(bus = Mod.EventBusSubscriber.Bus.MOD)
public class JEI {

    public static IJeiHelpers jeiHelper;

    @Override
    public ResourceLocation getPluginUid() {
        return new ResourceLocation("improve_for_battle", "default");
    }

    @Override
    public void registerCategories(IRecipeCategoryRegistration registration) {
        jeiHelper = registration.getJeiHelpers();
        registration.addRecipeCategories(new ForgeAnvilJeiCategory(jeiHelper.getGuiHelper()));
    }

    @Override
    public void registerRecipes(IRecipeRegistration registration) {
        registration.addRecipes(generateForgeAnvilRecipes(), ForgeAnvilJeiCategory.Uid);
        // ...
    }

    private List<ForgeAnvilJeiCategory.ForgeAnvilRecipeWrapper> generateForgeAnvilRecipes() {
        List<ForgeAnvilJeiCategory.ForgeAnvilRecipeWrapper> recipes = new ArrayList<>();
        ArrayList<ItemStack> inputs = new ArrayList<>();
        ArrayList<ItemStack> outputs = new ArrayList<>();
        inputs.add(new ItemStack(Items.DIAMOND)); //slot 0 item
        inputs.add(new ItemStack(Items.DIAMOND)); //slot 1 item
        inputs.add(new ItemStack(Items.DIAMOND));//slot 2 item
        outputs.add(new ItemStack(Items.DIAMOND)); //slot 3 item
        // ...
        recipes.add(new ForgeAnvilJeiCategory.ForgeAnvilRecipeWrapper(inputs, outputs));
        return recipes;
    }

    @Override
    public void registerRecipeCatalysts(IRecipeCatalystRegistration registration) {
        registration.addRecipeCatalyst(new ItemStack(ForgeAnvilBlock.block), ForgeAnvilJeiCategory.Uid);
    }

    public static class ForgeAnvilJeiCategory implements IRecipeCategory<ForgeAnvilJeiCategory.ForgeAnvilRecipeWrapper> {
        private static ResourceLocation Uid = new ResourceLocation("improve_for_battle", "forgeanvilcategory");
        private static final int input1 = 0; // THE NUMBER = SLOTID
        private static final int input2 = 1; // THE NUMBER = SLOTID
        private static final int output1 = 3; // THE NUMBER = SLOTID
        // ...
        private final String title;
        private final IDrawable background;

        public ForgeAnvilJeiCategory(IGuiHelper guiHelper) {
            this.title = "Forge Anvil";
            this.background = guiHelper.createDrawable(new ResourceLocation("improve_for_battle", "textures/anvil_forge_gui.png"), 0, 0, 178, 166);
        }

        @Override
        public ResourceLocation getUid() {
            return Uid;
        }

        @Override
        public Class<? extends ForgeAnvilRecipeWrapper> getRecipeClass() {
            return ForgeAnvilJeiCategory.ForgeAnvilRecipeWrapper.class;
        }

        @Override
        public String getTitle() {
            return title;
        }

        @Override
        public IDrawable getBackground() {
            return background;
        }

        @Override
        public IDrawable getIcon() {
            return null;
        }

        @Override
        public void setIngredients(ForgeAnvilRecipeWrapper recipeWrapper, IIngredients iIngredients) {
            iIngredients.setInputs(VanillaTypes.ITEM, recipeWrapper.getInput());
            iIngredients.setOutputs(VanillaTypes.ITEM, recipeWrapper.getOutput());
        }

        @Override
        public void setRecipe(IRecipeLayout iRecipeLayout, ForgeAnvilRecipeWrapper recipeWrapper, IIngredients iIngredients) {
            IGuiItemStackGroup stacks = iRecipeLayout.getItemStacks();
            stacks.init(input1, true, 17, 46);
            stacks.init(input2, true, 75, 46);
            stacks.init(output1, false, 143, 46);
            // ...
            stacks.set(input1, iIngredients.getInputs(VanillaTypes.ITEM).get(0));
            stacks.set(input2, iIngredients.getInputs(VanillaTypes.ITEM).get(1));
            stacks.set(output1, iIngredients.getOutputs(VanillaTypes.ITEM).get(0));
            // ...
        }

        public static class ForgeAnvilRecipeWrapper {
            private List<ItemStack> input;
            private List<ItemStack> output;

            public ForgeAnvilRecipeWrapper(List<ItemStack> input, List<ItemStack> output) {
                this.input = input;
                this.output = output;
            }

            public List<ItemStack> getInput() {
                return input;
            }

            public List<ItemStack> getOutput() {
                return output;
            }
        }
    }
}