T2Code-Alias/src/main/java/net/t2code/alias/Spigot/cmdManagement/TabEvent.java

package net.t2code.alias.Spigot.cmdManagement;

import net.t2code.alias.Spigot.Main;
import net.t2code.alias.Spigot.objects.SubAliasObject;
import net.t2code.t2codelib.SPIGOT.api.commands.T2Ctab;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.server.TabCompleteEvent;

import java.util.*;

public class TabEvent implements Listener {
    private static HashMap<String, String> arg1 = new HashMap<String, String>();

    @EventHandler
    public void onTab(TabCompleteEvent e) {
        String buffer = e.getBuffer();
        String[] imp = buffer.replace("/", "").split(" ");
        if (!Main.allAliases.contains(imp[0]) || !Main.allForSubAliases.contains(imp[0])){
            return;
        }
        List<String> list = new ArrayList<>(Collections.emptyList());
        arg1.clear();

        for (String sals : Main.allSubAliases) {
            SubAliasObject aliasObject = Main.subAliasHashMap.get(sals);
            if (!buffer.contains(aliasObject.subAliasFor)) continue;

            String[] im = aliasObject.subAliasFor.split(" ");
            String input = buffer.replace("/" + im[0] + " ", "");
            String[] args = input.split(" ", -1);

            for (String al : aliasObject.subAliasList) {
                arg1.put(al, aliasObject.permission.replace("<alias>", al.toLowerCase()));
            }
            int arg = aliasObject.subAliasArg;
            if (args.length - 1 == arg) {
                for (String command : aliasObject.subAliasList) {
                    if (T2Ctab.hasPermission(e.getSender(), arg1.get(command)) && T2Ctab.passend(command, args[arg])) {
                        list.add(command);
                    }
                }
            }
        }
        e.setCompletions(list);
    }
}