Equipment.java

package net.scapeemulator.game.model.player;

import net.scapeemulator.game.model.player.inventory.Inventory;
import net.scapeemulator.game.model.player.skills.runecrafting.Runecrafting;

public final class Equipment {

    public static final int HEAD = 0;
    public static final int CAPE = 1;
    public static final int NECK = 2;
    public static final int WEAPON = 3;
    public static final int BODY = 4;
    public static final int SHIELD = 5;
    public static final int LEGS = 7;
    public static final int HANDS = 9;
    public static final int FEET = 10;
    public static final int RING = 12;
    public static final int AMMO = 13;

    public static void remove(Player player, int slot) {
        Inventory inventory = player.getInventory();
        Inventory equipment = player.getEquipment();

        Item item = equipment.get(slot);
        if (item == null)
            return;

        Item remaining = inventory.add(item);
        equipment.set(slot, remaining);

        if (remaining == null) {
            if (slot == WEAPON) {
                player.getPlayerCombatHandler().weaponChanged();
            }
            equipmentChanged(player, slot, item, null);
        }
    }

    public static void equip(Player player, int slot) {
        Inventory inventory = player.getInventory();
        Inventory equipment = player.getEquipment();
        Item originalWeapon = equipment.get(WEAPON);

        Item item = inventory.get(slot);
        if (item == null)
            return;

        EquipmentDefinition def = item.getEquipmentDefinition();
        if (def == null)
            return;

        if (!def.getRequirements().hasRequirementsDisplayAll(player)) {
            return;
        }
        def.getRequirements().fulfillAll(player);

        int targetSlot = def.getSlot();
        boolean unequipShield = def.getSlot() == WEAPON && def.isTwoHanded() && equipment.get(SHIELD) != null;
        boolean unequipWeapon = targetSlot == SHIELD && equipment.get(WEAPON) != null && equipment.get(WEAPON).getEquipmentDefinition().isTwoHanded();
        boolean topUpStack = item.getDefinition().isStackable()
                && (equipment.get(targetSlot) != null && item.getId() == equipment.get(targetSlot).getId());
        boolean drainStack = equipment.get(targetSlot) != null && equipment.get(targetSlot).getDefinition().isStackable()
                && inventory.contains(equipment.get(targetSlot).getId());

        if ((unequipShield || unequipWeapon) && inventory.freeSlots() == 0) {
            inventory.fireCapacityExceeded();
            return;
        }

        if (topUpStack) {
            Item remaining = equipment.add(item);
            inventory.set(slot, remaining);
        } else {
            if (drainStack) {
                Item remaining = inventory.add(equipment.get(targetSlot));
                equipment.set(targetSlot, remaining);
                if (remaining != null)
                    return;
            }
            inventory.remove(item, slot);

            Item other = equipment.get(targetSlot);
            if (other != null) {
                inventory.add(other);
            }

            equipment.set(targetSlot, item);
            equipmentChanged(player, targetSlot, other, item);
        }

        if (unequipShield) {
            Item remaining = inventory.add(equipment.get(SHIELD));
            equipment.set(SHIELD, remaining);
        } else if (unequipWeapon) {
            Item remaining = inventory.add(equipment.get(WEAPON));
            equipment.set(WEAPON, remaining);
        }

        Item weapon = equipment.get(WEAPON);
        boolean weaponChanged = false;
        if (originalWeapon == null && weapon != null)
            weaponChanged = true;
        else if (weapon == null && originalWeapon != null)
            weaponChanged = true;
        else if (originalWeapon != null && weapon != null && originalWeapon.getId() != weapon.getId())
            weaponChanged = true;

        if (weaponChanged) {
            player.getPlayerCombatHandler().weaponChanged();
        }

    }

    private static void equipmentChanged(Player p, int slot, Item oldI, Item newI) {
        p.calculateEquipmentBonuses();
        if (slot == HEAD) {
            Runecrafting.checkTiara(p, oldI, newI);
        }
    }

    public static void showEquipmentInterface(Player player) {
        player.getInterfaceSet().openWindow(667);
        player.sendEquipmentBonuses();
    }

    private Equipment() {
        /* empty */
    }

}