CommandPanels/src/me/rockyhawk/commandPanels/panelBlocks/blocksTabComplete.java

package me.rockyhawk.commandPanels.panelBlocks;

import me.rockyhawk.commandPanels.commandpanels;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.TabCompleter;
import org.bukkit.configuration.file.YamlConfiguration;
import org.bukkit.entity.Player;

import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Objects;


public class blocksTabComplete implements TabCompleter {
    commandpanels plugin;
    public blocksTabComplete(commandpanels pl) { this.plugin = pl; }
    @Override
    public List<String> onTabComplete(CommandSender sender, Command cmd, String label, String[] args) {
        if(sender instanceof Player){
            Player p = ((Player) sender).getPlayer();
            if(label.equalsIgnoreCase("cpb") || label.equalsIgnoreCase("cpanelb") || label.equalsIgnoreCase("commandpanelblock")){
                if(args.length == 2) {
                    if(args[0].equals("add") && p.hasPermission("commandpanel.block.add")) {
                        ArrayList<String> apanels = new ArrayList<String>(); //all panels
                        String tpanels; //tpanels is the temp to check through the files
                        try {
                            for (String fileName : plugin.panelFiles) { //will loop through all the files in folder
                                YamlConfiguration temp = YamlConfiguration.loadConfiguration(new File(plugin.panelsf + File.separator + fileName));
                                String key;
                                tpanels = "";
                                if (!plugin.checkPanels(temp)) {
                                    return null;
                                }
                                for (Iterator var10 = Objects.requireNonNull(temp.getConfigurationSection("panels")).getKeys(false).iterator(); var10.hasNext(); tpanels = tpanels + key + " ") {
                                    key = (String) var10.next();
                                    if (!key.startsWith(args[1])) {
                                        //this will narrow down the panels to what the user types
                                        continue;
                                    }
                                    if (sender.hasPermission("commandpanel.panel." + temp.getString("panels." + key + ".perm"))) {
                                        if (temp.contains("panels." + key + ".disabled-worlds")) {
                                            List<String> disabledWorlds = (List<String>) temp.getList("panels." + key + ".disabled-worlds");
                                            if (!disabledWorlds.contains(p.getWorld().getName())) {
                                                apanels.add(key);
                                            }
                                        } else {
                                            apanels.add(key);
                                        }
                                    }
                                }
                                //if file contains opened panel then start
                            }
                        } catch (Exception fail) {
                            //could not fetch all panel names (probably no panels exist)
                        }
                        return apanels;
                    }
                }
                if(args.length == 1){
                    ArrayList<String> output = new ArrayList<String>();
                    if (sender.hasPermission("commandpanel.block.add")){
                        output.add("add");
                    }
                    if (sender.hasPermission("commandpanel.block.remove")){
                        output.add("remove");
                    }
                    if (sender.hasPermission("commandpanel.block.list")){
                        output.add("list");
                    }
                    return output;
                }
            }
        }
        return null;
    }
}