Finish implementing the Ihan Crystal

src/main/java/dev/zontreck/otemod/items/IhanCrystal.java

@@ -1,11 +1,98 @@
 package dev.zontreck.otemod.items;
 
+import dev.zontreck.libzontreck.util.ChatHelpers;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.level.ServerPlayer;
+import net.minecraft.sounds.SoundEvents;
+import net.minecraft.sounds.SoundSource;
+import net.minecraft.stats.Stats;
+import net.minecraft.world.InteractionHand;
+import net.minecraft.world.InteractionResultHolder;
+import net.minecraft.world.entity.player.Player;
 import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.TooltipFlag;
+import net.minecraft.world.level.Level;
+
+import java.util.List;
 
 public class IhanCrystal extends Item{
 
-    public IhanCrystal(Properties p_41383_) {
-        super(p_41383_);
+    public static final String TAG_XP = "xp";
+
+    public IhanCrystal() {
+        super(new Properties().stacksTo(1));
     }
-    
+
+    private void assertTag(ItemStack stack)
+    {
+        if(!stack.hasTag() || stack.getTag()==null)
+        {
+            stack.setTag(new CompoundTag());
+        }
+    }
+
+    @Override
+    public boolean isFoil(ItemStack stack) {
+        assertTag(stack);
+
+        if(stack.getTag().contains(TAG_XP))
+        {
+            if(stack.getTag().getInt(TAG_XP) > 0)
+            {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public void appendHoverText(ItemStack stack, Level p_41422_, List<Component> tooltip, TooltipFlag p_41424_) {
+        assertTag(stack);
+
+        tooltip.add(ChatHelpers.macro("!Dark_Green!Stored XP: !Dark_Red!" + stack.getTag().getInt(TAG_XP) + "!Dark_Green! level" + ((stack.getTag().getInt(TAG_XP)>1)?"levels" : "level")));
+    }
+
+    @Override
+    public InteractionResultHolder<ItemStack> use(Level serverWorld, Player player, InteractionHand hand) {
+        ItemStack stack = player.getItemInHand(hand);
+
+        assertTag(stack);
+
+        serverWorld.playSound(player, player.getOnPos(), SoundEvents.EXPERIENCE_ORB_PICKUP, SoundSource.NEUTRAL);
+
+        if(!serverWorld.isClientSide)
+        {
+
+            ServerPlayer serverPlayer = (ServerPlayer) player;
+            if(player.isCrouching())
+            {
+                int lvls=0;
+                // Unpack the experience levels - 10 at a time!!
+                int xp = stack.getTag().getInt(TAG_XP);
+                if(xp>10){
+                    lvls = 10;
+                }else lvls= xp;
+                xp-=lvls;
+
+                serverPlayer.setExperienceLevels(serverPlayer.experienceLevel + lvls);
+
+                stack.getTag().putInt(TAG_XP, xp);
+            } else {
+                // Store the xp
+                int xp = stack.getTag().getInt(TAG_XP);
+                xp += player.experienceLevel;
+
+                serverPlayer.setExperienceLevels(0);
+
+                stack.getTag().putInt(TAG_XP, xp);
+            }
+        }
+
+        player.awardStat(Stats.ITEM_USED.get(this));
+        return InteractionResultHolder.sidedSuccess(stack, serverWorld.isClientSide);
+
+    }
+
 }

src/main/java/dev/zontreck/otemod/items/ModItems.java

@@ -16,7 +16,7 @@ public class ModItems {
 
     public static final RegistryObject<Item> ETERNIUM_FRAGMENT = CreativeModeTabs.addToOTEModTab(ITEMS.register("eternium_fragment", () -> new Item(new Item.Properties())));
 
-    public static final RegistryObject<Item> IHAN_CRYSTAL = CreativeModeTabs.addToOTEModTab(ITEMS.register("ihan_crystal", () -> new Item(new Item.Properties())));
+    public static final RegistryObject<Item> IHAN_CRYSTAL = CreativeModeTabs.addToOTEModTab(ITEMS.register("ihan_crystal", () -> new IhanCrystal()));
 
 
 

src/main/java/dev/zontreck/otemod/util/ExperienceUtils.java

@@ -0,0 +1,13 @@
+package dev.zontreck.otemod.util;
+
+public class ExperienceUtils
+{
+
+    public static int getXpNeededForNextLevel(int xpLvl) {
+        if (xpLvl >= 30) {
+            return 112 + (xpLvl - 30) * 9;
+        } else {
+            return xpLvl >= 15 ? 37 + (xpLvl - 15) * 5 : 7 + xpLvl * 2;
+        }
+    }
+}