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SentinelItemHelper.java
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SentinelItemHelper.java
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package org.mcmonkey.sentinel;
import net.citizensnpcs.api.trait.trait.Inventory;
import org.bukkit.Material;
import org.bukkit.inventory.ItemStack;
/**
* Helper for item management.
*/
public class SentinelItemHelper extends SentinelHelperObject {
/**
* Gets the correct ArrowItem type for the NPC based on inventory items (can be null if the NPC needs ammo but has none).
*/
public ItemStack getArrow() {
if (!getNPC().hasTrait(Inventory.class)) {
return sentinel.needsAmmo ? null : new ItemStack(Material.ARROW, 1);
}
Inventory inv = getNPC().getTrait(Inventory.class);
ItemStack[] items = inv.getContents();
for (ItemStack item : items) {
if (item != null) {
Material mat = item.getType();
if (SentinelTarget.v1_9) {
if (mat == Material.ARROW || mat == Material.TIPPED_ARROW || mat == Material.SPECTRAL_ARROW) {
return item.clone();
}
}
else {
if (mat == Material.ARROW) {
return item.clone();
}
}
}
}
return sentinel.needsAmmo ? null : new ItemStack(Material.ARROW, 1);
}
/**
* Reduces the durability of the NPC's held item.
*/
public void reduceDurability() {
if (SentinelTarget.v1_9) {
ItemStack item = getLivingEntity().getEquipment().getItemInMainHand();
if (item != null && item.getType() != Material.AIR) {
if (item.getDurability() >= item.getType().getMaxDurability() - 1) {
getLivingEntity().getEquipment().setItemInMainHand(null);
}
else {
item.setDurability((short) (item.getDurability() + 1));
getLivingEntity().getEquipment().setItemInMainHand(item);
}
}
}
else {
ItemStack item = getLivingEntity().getEquipment().getItemInHand();
if (item != null && item.getType() != Material.AIR) {
if (item.getDurability() >= item.getType().getMaxDurability() - 1) {
getLivingEntity().getEquipment().setItemInHand(null);
}
else {
item.setDurability((short) (item.getDurability() + 1));
getLivingEntity().getEquipment().setItemInHand(item);
}
}
}
}
/**
* Takes an arrow from the NPC's inventory.
*/
public void takeArrow() {
if (!getNPC().hasTrait(Inventory.class)) {
return;
}
Inventory inv = getNPC().getTrait(Inventory.class);
ItemStack[] items = inv.getContents();
for (int i = 0; i < items.length; i++) {
ItemStack item = items[i];
if (item != null) {
Material mat = item.getType();
if (mat == Material.ARROW || (SentinelTarget.v1_9 && (mat == Material.TIPPED_ARROW || mat == Material.SPECTRAL_ARROW))) {
if (item.getAmount() > 1) {
item.setAmount(item.getAmount() - 1);
items[i] = item;
inv.setContents(items);
return;
}
else {
items[i] = null;
inv.setContents(items);
return;
}
}
}
}
}
/**
* Takes a snowball from the NPC's inventory.
*/
public void takeSnowball() {
if (!getNPC().hasTrait(Inventory.class)) {
return;
}
Inventory inv = getNPC().getTrait(Inventory.class);
ItemStack[] items = inv.getContents();
for (int i = 0; i < items.length; i++) {
ItemStack item = items[i];
if (item != null) {
Material mat = item.getType();
if (mat == SentinelTarget.MATERIAL_SNOW_BALL) {
if (item.getAmount() > 1) {
item.setAmount(item.getAmount() - 1);
items[i] = item;
inv.setContents(items);
return;
}
else {
items[i] = null;
inv.setContents(items);
return;
}
}
}
}
}
/**
* Takes one item from the NPC's held items (for consumables).
*/
public void takeOne() {
if (SentinelTarget.v1_9) {
ItemStack item = getLivingEntity().getEquipment().getItemInMainHand();
if (item != null && item.getType() != Material.AIR) {
if (item.getAmount() > 1) {
item.setAmount(item.getAmount() - 1);
getLivingEntity().getEquipment().setItemInMainHand(item);
}
else {
getLivingEntity().getEquipment().setItemInMainHand(null);
}
}
}
else {
ItemStack item = getLivingEntity().getEquipment().getItemInHand();
if (item != null && item.getType() != Material.AIR) {
if (item.getAmount() > 1) {
item.setAmount(item.getAmount() - 1);
getLivingEntity().getEquipment().setItemInHand(item);
}
else {
getLivingEntity().getEquipment().setItemInHand(null);
}
}
}
}
/**
* Grabs the next item for an NPC to use and moves it into the NPC's hand.
*/
public void grabNextItem() {
if (!getNPC().hasTrait(Inventory.class)) {
return;
}
Inventory inv = getNPC().getTrait(Inventory.class);
ItemStack[] items = inv.getContents();
ItemStack held = items[0];
if (held != null && held.getType() != Material.AIR) {
return;
}
for (int i = 0; i < items.length; i++) {
ItemStack item = items[i];
if (item != null) {
item = item.clone();
Material mat = item.getType();
if (SentinelTarget.isWeapon(mat)) {
if (item.getAmount() > 1) {
item.setAmount(item.getAmount() - 1);
items[i] = item;
items[0] = item.clone();
items[0].setAmount(1);
inv.setContents(items);
item = item.clone();
item.setAmount(1);
return;
}
else {
items[i] = new ItemStack(Material.AIR);
items[0] = item.clone();
inv.setContents(items);
return;
}
}
}
}
}
/**
* Swaps the NPC to a ranged weapon if possible.
*/
public void swapToRanged() {
if (!getNPC().hasTrait(Inventory.class)) {
return;
}
int i = 0;
Inventory inv = getNPC().getTrait(Inventory.class);
ItemStack[] items = inv.getContents();
ItemStack held = items[0] == null ? null : items[0].clone();
boolean edit = false;
while (!isRanged() && i < items.length - 1) {
i++;
if (items[i] != null && items[i].getType() != Material.AIR) {
items[0] = items[i].clone();
items[i] = new ItemStack(Material.AIR);
inv.setContents(items);
edit = true;
}
}
if (edit) {
items[i] = held;
inv.setContents(items);
}
}
/**
* Swaps the NPC to a melee weapon if possible.
*/
public void swapToMelee() {
if (!getNPC().hasTrait(Inventory.class)) {
return;
}
int i = 0;
Inventory inv = getNPC().getTrait(Inventory.class);
ItemStack[] items = inv.getContents();
ItemStack held = items[0] == null ? null : items[0].clone();
boolean edit = false;
while (isRanged() && i < items.length - 1) {
i++;
if (items[i] != null && items[i].getType() != Material.AIR) {
items[0] = items[i].clone();
items[i] = new ItemStack(Material.AIR);
inv.setContents(items);
edit = true;
}
}
if (edit) {
items[i] = held;
inv.setContents(items);
}
}
/**
* Returns whether the NPC is holding a ranged weapon.
*/
public boolean isRanged() {
return usesBow()
|| usesFireball()
|| usesSnowball()
|| usesLightning()
|| usesSpectral()
|| usesPotion();
}
/**
* Returns the item held by an NPC.
*/
public ItemStack getHeldItem() {
if (!getNPC().hasTrait(Inventory.class)) {
if (!getNPC().isSpawned()) {
return null;
}
// TODO: Just only use this (instead of Inventory trait)?
return SentinelUtilities.getHeldItem(getLivingEntity());
}
return getNPC().getTrait(Inventory.class).getContents()[0];
}
/**
* Returns whether the NPC is using a bow item.
*/
public boolean usesBow() {
ItemStack it = getHeldItem();
return it != null && it.getType() == Material.BOW && getArrow() != null;
}
/**
* Returns whether the NPC is using a fireball item.
*/
public boolean usesFireball() {
ItemStack it = getHeldItem();
return it != null && it.getType() == SentinelTarget.MATERIAL_BLAZE_ROD;
}
/**
* Returns whether the NPC is using a snowball item.
*/
public boolean usesSnowball() {
ItemStack it = getHeldItem();
return it != null && it.getType() == SentinelTarget.MATERIAL_SNOW_BALL;
}
/**
* Returns whether the NPC is using a lightning-attack item.
*/
public boolean usesLightning() {
ItemStack it = getHeldItem();
return it != null && it.getType() == SentinelTarget.MATERIAL_NETHER_STAR;
}
/**
* Returns whether the NPC is using an egg item.
*/
public boolean usesEgg() {
ItemStack it = getHeldItem();
return it != null && it.getType() == Material.EGG;
}
/**
* Returns whether the NPC is using a peal item.
*/
public boolean usesPearl() {
ItemStack it = getHeldItem();
return it != null && it.getType() == Material.ENDER_PEARL;
}
/**
* Returns whether the NPC is using a wither-skull item.
*/
public boolean usesWitherSkull() {
if (!SentinelPlugin.instance.canUseSkull) {
return false;
}
ItemStack it = getHeldItem();
return it != null && SentinelTarget.SKULL_MATERIALS.contains(it.getType());
}
/**
* Returns whether the NPC is using a spectral-effect-attack item.
*/
public boolean usesSpectral() {
if (!SentinelTarget.v1_10) {
return false;
}
ItemStack it = getHeldItem();
return it != null && it.getType() == Material.SPECTRAL_ARROW;
}
/**
* Returns whether the NPC is using a potion item.
*/
public boolean usesPotion() {
ItemStack it = getHeldItem();
return it != null && SentinelTarget.POTION_MATERIALS.contains(it.getType());
}
/**
* Returns whether the NPC can take durability from the held item.
*/
public boolean shouldTakeDura() {
Material type = getHeldItem().getType();
return SentinelTarget.BOW_MATERIALS.contains(type) || SentinelTarget.SWORD_MATERIALS.contains(type)
|| SentinelTarget.PICKAXE_MATERIALS.contains(type) || SentinelTarget.AXE_MATERIALS.contains(type);
}
}