DemonPlayerView/src/main/java/com/yaohun/playerview/gui/BackpackGui.java

package com.yaohun.playerview.gui;

import com.yaohun.playerview.util.StackUtil;
import eos.moe.dragoncore.api.FutureSlotAPI;
import me.Demon.DemonPlugin.DemonAPI;
import org.bukkit.Bukkit;
import org.bukkit.Sound;
import org.bukkit.entity.Player;
import org.bukkit.inventory.Inventory;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.PlayerInventory;
import org.bukkit.inventory.meta.ItemMeta;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;

public class BackpackGui {

    private static final String INV_TITLE = "§v§i§e§w§r玩家交互 - ";

    public static void openGui(Player player, Player target,boolean backpackD){
        String targetName = target.getName();
        Inventory inv = Bukkit.createInventory(null,45,INV_TITLE+"正在查看"+targetName+"的背包");
        ItemStack glass = DemonAPI.glass(15, "§r");
        for (int i = 36;i<45;i++) {
            inv.setItem(i, glass);
        }
        if(backpackD){
            PlayerInventory inventory = target.getInventory();
            for(int i = 9; i < 45; i++){
                ItemStack item = inventory.getItem(i);
                if(!DemonAPI.itemIsNull(item)){
                    inv.setItem(i-9,infoItems(item));
                }
            }
            for(int i = 0; i < 9; i++){
                ItemStack item = inventory.getItem(i);
                if(!DemonAPI.itemIsNull(item)){
                    inv.setItem(i+27,infoItems(item));
                }
            }
            inv.setItem(40, StackUtil.modeSwitch(targetName,backpackD));
        } else {
            addEquipment(target,inv);
            addDragonStack(target,inv,9,"头部兽骨");
            addDragonStack(target,inv,10,"躯干兽骨");
            addDragonStack(target,inv,11,"尾部兽骨");
            addDragonStack(target,inv,12,"手部兽骨1");
            addDragonStack(target,inv,13,"手部兽骨2");
            addDragonStack(target,inv,14,"腿部兽骨1");
            addDragonStack(target,inv,15,"腿部兽骨2");
            addDragonStack(target,inv,18,"暗器槽1");
            addDragonStack(target,inv,19,"暗器槽2");
            addDragonStack(target,inv,20,"暗器槽3");
            addDragonStack(target,inv,21,"暗器槽4");
            addDragonStack(target,inv,23,"项链槽");
            addDragonStack(target,inv,24,"戒指槽");
            addDragonStack(target,inv,25,"手镯槽");
            addDragonStack(target,inv,26,"公仔槽");
            inv.setItem(40, StackUtil.modeSwitch(targetName,backpackD));
        }
        player.openInventory(inv);
        player.playSound(player.getLocation(), Sound.ENTITY_CHICKEN_EGG,0.8f,1);
    }

    private static void addDragonStack(Player target,Inventory inv,int slot,String identifier){
        ItemStack stack = getDragonItems(target,identifier);
        if(!DemonAPI.itemIsNull(stack)) {
            inv.setItem(slot, infoItems(stack));
        }
    }

    private static void addEquipment(Player target,Inventory inv){
        // 添加头盔
        PlayerInventory inventory = target.getInventory();
        if(!DemonAPI.itemIsNull(inventory.getHelmet())){
            inv.setItem(0, infoItems(inventory.getHelmet()));
        }
        // 添加胸甲
        if(!DemonAPI.itemIsNull(inventory.getChestplate())){
            inv.setItem(1, infoItems(inventory.getChestplate()));
        }
        // 添加护腿
        if(!DemonAPI.itemIsNull(inventory.getLeggings())){
            inv.setItem(2, infoItems(inventory.getLeggings()));
        }
        // 添加靴子
        if(!DemonAPI.itemIsNull(inventory.getBoots())){
            inv.setItem(3, infoItems(inventory.getBoots()));
        }
        // 添加主手
        if(!DemonAPI.itemIsNull(inventory.getItemInMainHand())){
            inv.setItem(4, infoItems(inventory.getItemInMainHand()));
        }
        // 添加副手
        if(!DemonAPI.itemIsNull(inventory.getItemInOffHand())){
            inv.setItem(5, infoItems(inventory.getItemInOffHand()));
        }
    }

    private static ItemStack infoItems(ItemStack items){
        ItemStack item = items.clone();
        ItemMeta meta = item.getItemMeta();
        List<String> lore = new ArrayList<>();
        if(!DemonAPI.itemIsLore(items)){
            lore.addAll(items.getItemMeta().getLore());
        }
        lore.add("§c仅供查看");
        meta.setLore(lore);
        item.setItemMeta(meta);
        return item;
    }

    private static ItemStack getDragonItems(Player p, String identifier) {
        try {
            ItemStack item = FutureSlotAPI.getSlotItem(p, identifier).get(); // 只调用一次

            if (!DemonAPI.itemIsNull(item) && !DemonAPI.itemIsLore(item)) {
                return item;
            }
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        }
        return null;
    }

}