/*
 * Copyright (c) 2016 Lucko (Luck) <luck@lucko.me>
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 *  SOFTWARE.
 */

package me.lucko.luckperms.users;

import lombok.Getter;
import lombok.Setter;
import me.lucko.luckperms.LPBukkitPlugin;
import me.lucko.luckperms.api.event.events.UserPermissionRefreshEvent;
import me.lucko.luckperms.api.implementation.internal.UserLink;
import org.bukkit.permissions.PermissionAttachment;

import java.lang.reflect.Field;
import java.util.Map;
import java.util.UUID;

public class BukkitUser extends User {
    private static Field permissionsField = null;
    public static Field getPermissionsField() {
        if (permissionsField == null) {
            try {
                permissionsField = PermissionAttachment.class.getDeclaredField("permissions");
                permissionsField.setAccessible(true);
            } catch (SecurityException | NoSuchFieldException e) {
                e.printStackTrace();
            }
        }
        return permissionsField;
    }


    private final LPBukkitPlugin plugin;

    @Getter
    @Setter
    private PermissionAttachment attachment = null;

    BukkitUser(UUID uuid, LPBukkitPlugin plugin) {
        super(uuid, plugin);
        this.plugin = plugin;
    }

    BukkitUser(UUID uuid, String username, LPBukkitPlugin plugin) {
        super(uuid, username, plugin);
        this.plugin = plugin;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void refreshPermissions() {
        if (attachment == null) {
            getPlugin().getLog().severe("User " + getName() + " does not have a permissions attachment defined.");
        }

        // Calculate the permissions that should be applied. This is done async, who cares about how long it takes or how often it's done.
        Map<String, Boolean> toApply = getLocalPermissions(getPlugin().getConfiguration().getServer(), plugin.getUserManager().getWorldCache().get(getUuid()), null);

        try {
            // The map in the LP PermissionAttachment is a ConcurrentHashMap. We can modify it's contents async.
            Map<String, Boolean> existing = (Map<String, Boolean>) getPermissionsField().get(attachment);

            boolean different = false;
            if (toApply.size() != existing.size()) {
                different = true;
            } else {
                for (Map.Entry<String, Boolean> e : existing.entrySet()) {
                    if (toApply.containsKey(e.getKey()) && toApply.get(e.getKey()) == e.getValue()) {
                        continue;
                    }
                    different = true;
                    break;
                }
            }

            if (!different) return;

            existing.clear();
            existing.putAll(toApply);

            /* Must be called sync, as #recalculatePermissions is an unmodified Bukkit API call that is absolutely not thread safe.
               Shouldn't be too taxing on the server. This only gets called when permissions have actually changed,
               which is like once per user per login, assuming their permissions don't get modified. */
            plugin.doSync(() -> attachment.getPermissible().recalculatePermissions());

        } catch (Exception e) {
            e.printStackTrace();
        }

        plugin.getApiProvider().fireEventAsync(new UserPermissionRefreshEvent(new UserLink(this)));
    }
}

@@ -2560,109 +2560,14 @@
     
-getPlugin().getLog().severe(%22User %22 + getName() + %22 does not have a permissions attachment defined.%22)
+return
 ;%0A  

Fix NPE