TooltipHandler.java

package com.yolp900.itsjustacharm.common.tooltips;

import com.yolp900.itsjustacharm.api.IJCConstants;
import com.yolp900.itsjustacharm.reference.LibTexts;
import com.yolp900.itsjustacharm.util.NBTHelper;
import net.minecraft.block.Block;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemBlock;
import net.minecraft.item.ItemStack;
import net.minecraftforge.event.entity.player.ItemTooltipEvent;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

import javax.annotation.Nonnull;
import java.util.ArrayList;
import java.util.List;

public class TooltipHandler {

	@SubscribeEvent
	@SideOnly(Side.CLIENT)
	public void onRenderTooltips(ItemTooltipEvent event) {
		EntityPlayer player = event.getEntityPlayer();
		ItemStack stack = event.getItemStack();
		List<String> tooltip = event.getToolTip();
		if (stack == null) return;
		handleITooltipHolders(player, stack, tooltip);
		handleBaubleHolding(stack, tooltip);
	}

	private void handleITooltipHolders(EntityPlayer player, @Nonnull ItemStack stack, List<String> tooltip) {
		List<String> tooltips = new ArrayList<>();
		if (stack.getItem() instanceof ITooltipHolder) {
			tooltips = ((ITooltipHolder) stack.getItem()).getTooltip(stack, player).getLinedFormattedText();
		}
		if (stack.getItem() instanceof ItemBlock && Block.getBlockFromItem(stack.getItem()) instanceof ITooltipHolder) {
			tooltips = ((ITooltipHolder) Block.getBlockFromItem(stack.getItem())).getTooltip(stack, player).getLinedFormattedText();
		}
		for (String string : tooltips) {
			tooltip.add(string);
		}
	}

	private void handleBaubleHolding(@Nonnull ItemStack stack, List<String> tooltip) {
		if (NBTHelper.getBoolean(stack, IJCConstants.NBT.BAUBLE_HOLDER)) {
			ItemStack ring0 = NBTHelper.getItemStack(stack, IJCConstants.NBT.BAUBLE_ATTACHED(0));
			if (ring0 != null) {
				tooltip.add(LibTexts.Tooltips.BaubleHolderRingStored.getFormattedText(ring0.getDisplayName()));
				if (NBTHelper.getBoolean(stack, IJCConstants.NBT.ADVANCED_BAUBLE_HOLDER)) {
					ItemStack ring1 = NBTHelper.getItemStack(stack, IJCConstants.NBT.BAUBLE_ATTACHED(1));
					if (ring1 != null) {
						tooltip.add(LibTexts.Tooltips.BaubleHolderRingStored.getFormattedText(ring1.getDisplayName()));
					} else {
						List<String> lines = LibTexts.Tooltips.BaubleHolderAdvancedNoExtraRing.getLinedFormattedText();
						for (String line : lines) {
							tooltip.add(line);
						}
					}
				}
			} else {
				List<String> lines = LibTexts.Tooltips.BaubleHolderNoExtraBauble.getLinedFormattedText();
				for (String line : lines) {
					tooltip.add(line);
				}
			}
		}
	}

}