LuckPerms/bukkit/src/main/java/me/lucko/luckperms/CommandManagerBukkit.java

package me.lucko.luckperms;

import me.lucko.luckperms.commands.CommandManager;
import me.lucko.luckperms.commands.Sender;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;

import java.lang.ref.WeakReference;
import java.util.Arrays;

class CommandManagerBukkit extends CommandManager implements CommandExecutor {
    CommandManagerBukkit(LuckPermsPlugin plugin) {
        super(plugin);
    }

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        final WeakReference<CommandSender> cs = new WeakReference<>(sender);
        return onCommand(new Sender() {
            @Override
            public void sendMessage(String s) {
                CommandSender c = cs.get();
                if (c != null) {
                    c.sendMessage(s);
                }
            }

            @Override
            public boolean hasPermission(String node) {
                CommandSender c = cs.get();
                return c != null && c.hasPermission(node);
            }
        }, Arrays.asList(args));
    }
}