Optimize Drill Fuel and Picko Durability with Caching

src/main/java/de/hysky/skyblocker/mixin/ItemMixin.java

@@ -1,22 +1,19 @@
 package de.hysky.skyblocker.mixin;
 
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
 import org.objectweb.asm.Opcodes;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
-
-import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
-import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
-
-import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
+import org.spongepowered.asm.mixin.injection.Redirect;
 
 @Mixin(Item.class)
 public abstract class ItemMixin {
-	@WrapOperation(
+	@Redirect(
 		method = {"getItemBarColor", "getItemBarStep"},
 		at = @At(value = "FIELD", target = "Lnet/minecraft/item/Item;maxDamage:I", opcode = Opcodes.GETFIELD)
 	)
-	private int skyblocker$handlePickoDrillBar(Item item, Operation<Integer> original, ItemStack stack) {
+	private int skyblocker$handlePickoDrillBar(Item item, ItemStack stack) {
 		return stack.getMaxDamage();
 	}
 }

src/main/java/de/hysky/skyblocker/mixin/ItemStackMixin.java

@@ -4,48 +4,90 @@
 import com.llamalad7.mixinextras.injector.ModifyReturnValue;
 import de.hysky.skyblocker.config.SkyblockerConfigManager;
 import de.hysky.skyblocker.utils.ItemUtils;
-import de.hysky.skyblocker.utils.ItemUtils.Durability;
 import de.hysky.skyblocker.utils.Utils;
+import dev.cbyrne.betterinject.annotations.Inject;
+import it.unimi.dsi.fastutil.ints.IntIntPair;
 import net.minecraft.item.ItemStack;
 import net.minecraft.text.Text;
 import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 
 @Mixin(ItemStack.class)
 public abstract class ItemStackMixin {
+
+	@Shadow
+	public abstract int getDamage();
+
+	@Shadow
+	public abstract void setDamage(int damage);
+
+	@Unique
+	private int maxDamage;
+
 	@ModifyReturnValue(method = "getName", at = @At("RETURN"))
 	private Text skyblocker$customItemNames(Text original) {
-		if (Utils.isOnSkyblock())  {
+		if (Utils.isOnSkyblock()) {
 			return SkyblockerConfigManager.get().general.customItemNames.getOrDefault(ItemUtils.getItemUuid((ItemStack) (Object) this), original);
 		}
 
 		return original;
 	}
 
+	/**
+	 * Updates the durability of this item stack every tick when in the inventory.
+	 */
+	@Inject(method = "inventoryTick", at = @At("TAIL"))
+	private void skyblocker$updateDamage() {
+		if (!skyblocker$shouldProcess()) {
+			return;
+		}
+		skyblocker$getAndCacheDurability();
+	}
+
 	@ModifyReturnValue(method = "getDamage", at = @At("RETURN"))
 	private int skyblocker$handleDamage(int original) {
-		Durability dur = ItemUtils.getDurability((ItemStack) (Object) this);
-		if (dur != null) {
-			return dur.max() - dur.current();
+		// If the durability is already calculated, the original value should be the damage
+		if (!skyblocker$shouldProcess() || maxDamage != 0) {
+			return original;
 		}
-		return original;
+		return skyblocker$getAndCacheDurability() ? getDamage() : original;
 	}
 
 	@ModifyReturnValue(method = "getMaxDamage", at = @At("RETURN"))
 	private int skyblocker$handleMaxDamage(int original) {
-		Durability dur = ItemUtils.getDurability((ItemStack) (Object) this);
-		if (dur != null) {
-			return dur.max();
+		if (!skyblocker$shouldProcess()) {
+			return original;
 		}
-		return original;
+		// If the max damage is already calculated, return it
+		if (maxDamage != 0) {
+			return maxDamage;
+		}
+		return skyblocker$getAndCacheDurability() ? maxDamage : original;
 	}
 
 	@ModifyReturnValue(method = "isDamageable", at = @At("RETURN"))
 	private boolean skyblocker$handleDamageable(boolean original) {
-		Durability dur = ItemUtils.getDurability((ItemStack) (Object) this);
-		if (dur != null) {
-			return true;
+		return skyblocker$shouldProcess() || original;
+	}
+
+	@Unique
+	private boolean skyblocker$shouldProcess() {
+		return Utils.isOnSkyblock() && SkyblockerConfigManager.get().locations.dwarvenMines.enableDrillFuel && ItemUtils.hasCustomDurability((ItemStack) (Object) this);
+	}
+
+	@Unique
+	private boolean skyblocker$getAndCacheDurability() {
+		// Calculate the durability
+		IntIntPair durability = ItemUtils.getDurability((ItemStack) (Object) this);
+		// Return if calculating the durability failed
+		if (durability == null) {
+			return false;
 		}
-		return original;
+		// Saves the calculated durability
+		maxDamage = durability.rightInt();
+		setDamage(durability.rightInt() - durability.leftInt());
+		return true;
 	}
 }

src/main/java/de/hysky/skyblocker/utils/ItemUtils.java

@@ -1,7 +1,7 @@
 package de.hysky.skyblocker.utils;
 
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
-import de.hysky.skyblocker.config.SkyblockerConfigManager;
+import it.unimi.dsi.fastutil.ints.IntIntPair;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.item.TooltipContext;
 import net.minecraft.item.ItemStack;
@@ -105,29 +105,26 @@ public static String getItemUuid(@NotNull ItemStack stack) {
         return extraAttributes != null ? extraAttributes.getString(UUID) : "";
     }
 
-    @Nullable
-    public static Durability getDurability(@NotNull ItemStack stack) {
-        if (!Utils.isOnSkyblock() || !SkyblockerConfigManager.get().locations.dwarvenMines.enableDrillFuel || stack.isEmpty()) {
-            return null;
-        }
-
-        if (getExtraAttributesOptional(stack).filter(extraAttributes -> extraAttributes.contains("drill_fuel") || extraAttributes.getString(ItemUtils.ID).equals("PICKONIMBUS")).isEmpty()) {
-            return null;
-        }
+    public static boolean hasCustomDurability(@NotNull ItemStack stack) {
+        NbtCompound extraAttributes = getExtraAttributes(stack);
+        return extraAttributes != null && (extraAttributes.contains("drill_fuel") || extraAttributes.getString(ID).equals("PICKONIMBUS"));
+    }
 
+    @Nullable
+    public static IntIntPair getDurability(@NotNull ItemStack stack) {
         int current = 0;
         int max = 0;
         String clearFormatting;
 
-        for (String line : ItemUtils.getTooltipStrings(stack)) {
+        for (String line : getTooltipStrings(stack)) {
             clearFormatting = Formatting.strip(line);
             if (line.contains("Fuel: ")) {
                 if (clearFormatting != null) {
                     String clear = Pattern.compile("[^0-9 /]").matcher(clearFormatting).replaceAll("").trim();
                     String[] split = clear.split("/");
                     current = Integer.parseInt(split[0]);
                     max = Integer.parseInt(split[1]) * 1000;
-                    return new Durability(current, max);
+                    return IntIntPair.of(current, max);
                 }
             } else if (line.contains("uses.")) {
                 if (clearFormatting != null) {
@@ -138,7 +135,7 @@ public static Durability getDurability(@NotNull ItemStack stack) {
                         current = Integer.parseInt(usesString);
                         max = 5000;
                     }
-                    return new Durability(current, max);
+                    return IntIntPair.of(current, max);
                 }
             }
         }
@@ -153,7 +150,4 @@ public static ItemStack getSkyblockerStack() {
             throw new RuntimeException(e);
         }
     }
-
-    public record Durability(int current, int max) {
-    }
 }