Expand ArmorStand API

Adds the following:
- Add proper methods for getting and setting items in both hands. Deprecates old methods
- Enable/Disable slot interactions
- Allow using degrees for ArmorStand rotations (via new Rotations class)

Co-authored-by: SoSeDiK <mrsosedik@gmail.com>

paper-api/src/main/java/org/bukkit/entity/ArmorStand.java

@@ -14,7 +14,7 @@ public interface ArmorStand extends LivingEntity {
      *
      * @return the held item
      * @see #getEquipment()
-     * @deprecated prefer {@link EntityEquipment#getItemInHand()}
+     * @deprecated prefer {@link ArmorStand#getItem(EquipmentSlot)} // Paper
      */
     @NotNull
     @Deprecated(since = "1.15.2")
@@ -26,7 +26,7 @@ public interface ArmorStand extends LivingEntity {
      * @param item the item to hold
      * @see #getEquipment()
      * @deprecated prefer
-     * {@link EntityEquipment#setItemInHand(org.bukkit.inventory.ItemStack)}
+     * {@link ArmorStand#setItem(EquipmentSlot, ItemStack)} // Paper
      */
     @Deprecated(since = "1.15.2")
     void setItemInHand(@Nullable ItemStack item);
@@ -379,5 +379,169 @@ public interface ArmorStand extends LivingEntity {
      * @param tick {@code true} if this armour stand can tick, {@code false} otherwise
      */
     void setCanTick(final boolean tick);
+
+    /**
+     * Returns the item the armor stand has
+     * equip in the given equipment slot
+     *
+     * @param slot the equipment slot to get
+     * @return the ItemStack in the equipment slot
+     * @throws IllegalArgumentException if the slot is invalid for the entity
+     */
+    @NotNull
+    ItemStack getItem(@NotNull final org.bukkit.inventory.EquipmentSlot slot);
+
+    /**
+     * Sets the item the armor stand has
+     * equip in the given equipment slot
+     *
+     * @param slot the equipment slot to set
+     * @param item the item to hold
+     * @throws IllegalArgumentException if the slot is invalid for the entity
+     */
+    void setItem(@NotNull final org.bukkit.inventory.EquipmentSlot slot, @Nullable final ItemStack item);
+
+    /**
+     * Get the list of disabled slots
+     *
+     * @return list of disabled slots
+     */
+    @NotNull
+    java.util.Set<org.bukkit.inventory.EquipmentSlot> getDisabledSlots();
+
+    /**
+     * Set the disabled slots
+     *
+     * This makes it so a player is unable to interact with the Armor Stand to place, remove, or replace an item in the given slot(s)
+     * Note: Once a slot is disabled, the only way to get an item back it to break the armor stand.
+     *
+     * @param slots var-arg array of slots to lock
+     */
+    void setDisabledSlots(@NotNull org.bukkit.inventory.EquipmentSlot... slots);
+
+    /**
+     * Disable specific slots, adding them
+     * to the currently disabled slots
+     *
+     * This makes it so a player is unable to interact with the Armor Stand to place, remove, or replace an item in the given slot(s)
+     * Note: Once a slot is disabled, the only way to get an item back it to break the armor stand.
+     *
+     * @param slots var-arg array of slots to lock
+     */
+    void addDisabledSlots(@NotNull final org.bukkit.inventory.EquipmentSlot... slots);
+
+    /**
+     * Remove the given slots from the disabled
+     * slots list, enabling them.
+     *
+     * This makes it so a player is able to interact with the Armor Stand to place, remove, or replace an item in the given slot(s)
+     *
+     * @param slots var-arg array of slots to unlock
+     */
+    void removeDisabledSlots(@NotNull final org.bukkit.inventory.EquipmentSlot... slots);
+
+    /**
+     * Check if a specific slot is disabled
+     *
+     * @param slot The slot to check
+     * @return {@code true} if the slot is disabled, else {@code false}.
+     */
+    boolean isSlotDisabled(@NotNull org.bukkit.inventory.EquipmentSlot slot);
+
+    /**
+     * Returns the ArmorStand's body rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @return the current rotations
+     */
+    @NotNull io.papermc.paper.math.Rotations getBodyRotations();
+
+    /**
+     * Sets the ArmorStand's body rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @param rotations the current rotations
+     */
+    void setBodyRotations(@NotNull io.papermc.paper.math.Rotations rotations);
+
+    /**
+     * Returns the ArmorStand's left arm rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @return the current rotations
+     */
+    @NotNull io.papermc.paper.math.Rotations getLeftArmRotations();
+
+    /**
+     * Sets the ArmorStand's left arm rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @param rotations the current rotations
+     */
+    void setLeftArmRotations(@NotNull io.papermc.paper.math.Rotations rotations);
+
+    /**
+     * Returns the ArmorStand's right arm rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @return the current rotations
+     */
+    @NotNull io.papermc.paper.math.Rotations getRightArmRotations();
+
+    /**
+     * Sets the ArmorStand's right arm rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @param rotations the current rotations
+     */
+    void setRightArmRotations(@NotNull io.papermc.paper.math.Rotations rotations);
+
+    /**
+     * Returns the ArmorStand's left leg rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @return the current rotations
+     */
+    @NotNull io.papermc.paper.math.Rotations getLeftLegRotations();
+
+    /**
+     * Sets the ArmorStand's left leg rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @param rotations the current rotations
+     */
+    void setLeftLegRotations(@NotNull io.papermc.paper.math.Rotations rotations);
+
+    /**
+     * Returns the ArmorStand's right leg rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @return the current rotations
+     */
+    @NotNull io.papermc.paper.math.Rotations getRightLegRotations();
+
+    /**
+     * Sets the ArmorStand's right leg rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @param rotations the current rotations
+     */
+    void setRightLegRotations(@NotNull io.papermc.paper.math.Rotations rotations);
+
+    /**
+     * Returns the ArmorStand's head rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @return the current rotations
+     */
+    @NotNull io.papermc.paper.math.Rotations getHeadRotations();
+
+    /**
+     * Sets the ArmorStand's head rotations as
+     * {@link io.papermc.paper.math.Rotations}.
+     *
+     * @param rotations the current rotations
+     */
+    void setHeadRotations(@NotNull io.papermc.paper.math.Rotations rotations);
     // Paper end
 }