Check for empty items, add varargs overload

patches/api/0189-Add-Raw-Byte-ItemStack-Serialization.patch

@@ -22,7 +22,7 @@ index 688fccdbc5cf831008ef2f27db9d15b0921a7561..e4861a8be534bfeae0385f0197261fa6
      // Paper end
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index fd3d4dd231d756d51db0155a4c3ad970c4f456ed..a9ca792de95236535f8b6779fce2875e6c3bd2a9 100644
+index fd3d4dd231d756d51db0155a4c3ad970c4f456ed..331faa8c050ce8d3d10d5c4d91f4cb70e7242312 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
 @@ -26,6 +26,7 @@ import org.jetbrains.annotations.Nullable;
@@ -33,7 +33,7 @@ index fd3d4dd231d756d51db0155a4c3ad970c4f456ed..a9ca792de95236535f8b6779fce2875e
      private Material type = Material.AIR;
      private int amount = 0;
      private MaterialData data = null;
-@@ -650,6 +651,97 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -650,6 +651,110 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
          return Bukkit.getServer().getItemFactory().ensureServerConversions(this);
      }
 
@@ -62,7 +62,7 @@ index fd3d4dd231d756d51db0155a4c3ad970c4f456ed..a9ca792de95236535f8b6779fce2875e
 +    }
 +
 +    /**
-+     * Serializes a collection of items to raw bytes in NBT.
++     * Serializes a collection of items to raw bytes in NBT. Serializes empty items as null.
 +     * <p>
 +     * If you need a string representation to put into a file, you can for example use {@link java.util.Base64} encoding.
 +     *
@@ -76,7 +76,7 @@ index fd3d4dd231d756d51db0155a4c3ad970c4f456ed..a9ca792de95236535f8b6779fce2875e
 +            output.writeByte(ARRAY_SERIALIZATION_VERSION);
 +            output.writeInt(items.size());
 +            for (final ItemStack item : items) {
-+                if (item == null) {
++                if (item == null || item.isEmpty()) {
 +                    // Ensure the correct order by including empty/null items
 +                    output.writeInt(0);
 +                    continue;
@@ -93,6 +93,19 @@ index fd3d4dd231d756d51db0155a4c3ad970c4f456ed..a9ca792de95236535f8b6779fce2875e
 +    }
 +
 +    /**
++     * Serializes a collection of items to raw bytes in NBT. Serializes empty items as null.
++     * <p>
++     * If you need a string representation to put into a file, you can for example use {@link java.util.Base64} encoding.
++     *
++     * @param items items to serialize
++     * @return bytes representing the items in NBT
++     * @see #serializeAsBytes()
++     */
++    public static byte @NotNull [] serializeItemsAsBytes(@Nullable ItemStack @NotNull ... items) {
++        return serializeItemsAsBytes(java.util.Arrays.asList(items));
++    }
++
++    /**
 +     * Deserializes this itemstack from raw NBT bytes.
 +     * <p>
 +     * If you need a string representation to put into a file, you can for example use {@link java.util.Base64} encoding.

patches/api/0211-Add-methods-to-get-translation-keys.patch

@@ -478,7 +478,7 @@ index 5bd252c0ae3b09fe141d131360c67bb9bfbf5422..78587d9fabe6371a23a7963917b054db
 +
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index 01596d82ec54fdefe0acd7ea776f38c94d4d7d77..221e189503d35b59b364503d0e89dd20d1183c1f 100644
+index 331faa8c050ce8d3d10d5c4d91f4cb70e7242312..8638c26f95eb75ea111087c07a5e736ba63dd964 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
 @@ -25,7 +25,7 @@ import org.jetbrains.annotations.Nullable;
@@ -498,7 +498,7 @@ index 01596d82ec54fdefe0acd7ea776f38c94d4d7d77..221e189503d35b59b364503d0e89dd20
      public String getTranslationKey() {
          return Bukkit.getUnsafe().getTranslationKey(this);
      }
-@@ -944,5 +945,16 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -957,5 +958,16 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
          ItemMeta itemMeta = getItemMeta();
          return itemMeta != null && itemMeta.hasItemFlag(flag);
      }

patches/api/0264-Item-Rarity-API.patch

@@ -88,10 +88,10 @@ index 72a29fff4c497a2a66e2746ad42553bcb712e20d..22db1d8645a450308fe91d0cd100c926
      // Paper end
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index 221e189503d35b59b364503d0e89dd20d1183c1f..a85877288fe421c4c834db326f54543855df8441 100644
+index 8638c26f95eb75ea111087c07a5e736ba63dd964..b9d60079bdb7ee0db19b03986ff11c0bdf54d068 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
-@@ -956,5 +956,15 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -969,5 +969,15 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      public @NotNull String translationKey() {
          return Bukkit.getUnsafe().getTranslationKey(this);
      }

patches/api/0282-ItemStack-repair-check-API.patch

@@ -26,10 +26,10 @@ index a3810c693d3748fba818e4a835ceb77762f433b9..d9e3e4ad108a94ac6f0f5378d22d4784
       * Returns the server's protocol version.
       *
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index a85877288fe421c4c834db326f54543855df8441..73908f0e8d49377a4fb86c960fde10940998a325 100644
+index b9d60079bdb7ee0db19b03986ff11c0bdf54d068..752f4b23b9450a45c66cd0be9eca5c79c8379e87 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
-@@ -966,5 +966,27 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -979,5 +979,27 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      public io.papermc.paper.inventory.ItemRarity getRarity() {
          return Bukkit.getUnsafe().getItemStackRarity(this);
      }

patches/api/0387-ItemStack-damage-API.patch

@@ -65,10 +65,10 @@ index 70953573a7bcfa682dbaeaa8e3db0c847b254fdd..041ff387a0f9e8037e2834118ef241dd
      // Paper end
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index 2de0170ddd7c3c9f30cfec0596ede3386b0fb176..0bc0fb38204acb11a48157e8371ff9328e02e8c7 100644
+index 1af246a1149708d333874ba0eda33f9a6743c01b..5f8b7eb48561e9e81e03be3b09c47becc585513a 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
-@@ -1050,5 +1050,19 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -1063,5 +1063,19 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      public boolean canRepair(@NotNull ItemStack toBeRepaired) {
          return Bukkit.getUnsafe().isValidRepairItemStack(toBeRepaired, this);
      }

patches/api/0434-Allow-proper-checking-of-empty-item-stacks.patch

@@ -6,10 +6,10 @@ Subject: [PATCH] Allow proper checking of empty item stacks
 This adds a method to check if an item stack is empty or not. This mirrors vanilla's implementation of the same method.
 
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index 0bc0fb38204acb11a48157e8371ff9328e02e8c7..95dc486f5d93113cb016142a66ffd76fb81d66c3 100644
+index 5f8b7eb48561e9e81e03be3b09c47becc585513a..d84f1fa4c9240f579eb02f9e7a76dbcb080ea81a 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
-@@ -1064,5 +1064,24 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -1077,5 +1077,24 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
      public @NotNull ItemStack damage(int amount, @NotNull org.bukkit.entity.LivingEntity livingEntity) {
          return livingEntity.damageItemStack(this, amount);
      }

patches/api/0459-ItemStack-Tooltip-API.patch

@@ -119,10 +119,10 @@ index f2163b5238e1667a44bf623cd52bab90d9f2d88d..9a65c4f614a6c358d74491794d7b2517
 +    @NotNull java.util.List<net.kyori.adventure.text.Component> computeTooltipLines(@NotNull ItemStack itemStack, @NotNull io.papermc.paper.inventory.tooltip.TooltipContext tooltipContext, @Nullable org.bukkit.entity.Player player); // Paper - expose itemstack tooltip lines
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index f44b587ca5f6fdf09020e60fedf575e479b5d948..a28a588024f3face03d9f5e7682adb95d7e971c1 100644
+index 25155c1ab8f0d8c322adc008085044e391267c8d..6a97df55a72bfc3d503bf448afd7e11be8e87df9 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
-@@ -1084,4 +1084,21 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
+@@ -1097,4 +1097,21 @@ public class ItemStack implements Cloneable, ConfigurationSerializable, Translat
          return type.isAir() || amount <= 0;
      }
      // Paper end