BauSystem2.0/BauSystem_Main/src/de/steamwar/bausystem/Permission.java

/*
 * This file is a part of the SteamWar software.
 *
 * Copyright (C) 2021  SteamWar.de-Serverteam
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar.bausystem;

import de.steamwar.bausystem.config.BauServer;
import de.steamwar.command.CommandMetaData;
import de.steamwar.command.TypeValidator;
import de.steamwar.sql.BauweltMember;
import lombok.AllArgsConstructor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.function.Predicate;

@AllArgsConstructor
public enum Permission {

    WORLD(BauweltMember::isWorld),
    WORLDEDIT(BauweltMember::isWorldEdit),
    MEMBER(bauweltMember -> true),
    OWNER(bauweltMember -> false);

    private final Predicate<BauweltMember> permissionPredicate;

    public boolean hasPermission(Player member) {
        if (member.getUniqueId().equals(BauServer.getInstance().getOwner())) {
            return true;
        }

        BauweltMember bauMember = BauweltMember.getBauMember(BauServer.getInstance().getOwner(), member.getUniqueId());
        if (bauMember == null) {
            return false;
        }

        return permissionPredicate.test(bauMember);
    }

    public static boolean hasPermission(Player member, Permission permission) {
        return permission.hasPermission(member);
    }

    @Retention(RetentionPolicy.RUNTIME)
    @Target(ElementType.PARAMETER)
    @CommandMetaData.Parameter({Player.class})
    @CommandMetaData.ImplicitValidator(handler = Perm.Handler.class, order = -10)
    public @interface Perm {
        Permission value();
        String message() default "";

        class Handler implements TypeValidator<Player> {

            private Permission permission;
            private String message;

            public Handler(Perm perm) {
                this.permission = perm.value();
                this.message = perm.message();
                if (message != null && message.isEmpty()) message = null;
            }

            @Override
            public boolean validate(CommandSender commandSender, Player player, MessageSender messageSender) {
                if (message == null) {
                    return permission.hasPermission(player);
                }
                return !messageSender.send(!permission.hasPermission((Player) commandSender), message);
            }
        }
    }
}