CommandPanels/src/me/rockyhawk/commandpanels/panelblocks/BlocksTabComplete.java

package me.rockyhawk.commandpanels.panelblocks;

import me.rockyhawk.commandpanels.CommandPanels;
import me.rockyhawk.commandpanels.api.Panel;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.TabCompleter;
import org.bukkit.entity.Player;

import java.util.ArrayList;
import java.util.List;


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(args.length == 2) {
                    if(args[0].equals("add") && p.hasPermission("commandpanel.block.add")) {
                        ArrayList<String> apanels = new ArrayList<String>(); //all panels
                        try {
                            for (Panel panel : plugin.panelList) { //will loop through all the files in folder
                                if (!panel.getName().startsWith(args[1])) {
                                    //this will narrow down the panels to what the user types
                                    continue;
                                }
                                if (sender.hasPermission("commandpanel.panel." + panel.getConfig().getString("perm"))) {
                                    if(plugin.panelPerms.isPanelWorldEnabled(p,panel.getConfig())){
                                        apanels.add(panel.getName());
                                    }
                                }
                                //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;
    }
}