public class SignCommandCompletor implements TabCompleter {
    public SignPlugin plugin;

    public SignCommandCompletor(SignPlugin plugin) {
        this.plugin = plugin;
    }

    @Override
    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
        List<String> tabs = new ArrayList<String>();
        if(args.length == 2) {
            switch (args[1]) {
                case "copy":
                    break;
                case "paste":
                    plugin.cache.cache.forEach((s, a) -> tabs.add(s.toString()));
                    break;
            }
        } else if(args.length == 1) {
            tabs.add("copy");
            tabs.add("paste");
        }
        return tabs;
    }
}