content: /*
   * SoulFire
   * Copyright (C) 2024  AlexProgrammerDE
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see <https://www.gnu.org/licenses/>.
   */
  package com.soulfiremc.server.proxy;
  
  import com.soulfiremc.grpc.generated.ProxyProto;
  import com.soulfiremc.server.util.SocketAddressHelper;
  import lombok.NonNull;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.net.InetSocketAddress;
  import java.net.SocketAddress;
  
  public record SFProxy(
    @NonNull ProxyType type,
    @NonNull SocketAddress address,
    @Nullable String username,
    @Nullable String password) {
    public SFProxy {
      if (type == ProxyType.SOCKS4 && password != null) {
        throw new IllegalArgumentException("SOCKS4 does not support passwords!");
      } else if (username != null && username.isBlank()) {
        // Sanitize empty strings
        username = null;
      } else if (password != null && password.isBlank()) {
        // Sanitize empty strings
        password = null;
      }
  
      if (username == null && password != null) {
        throw new IllegalArgumentException("Username must be set if password is set!");
      }
  
      if (address instanceof InetSocketAddress inetSocketAddress && inetSocketAddress.isUnresolved()) {
        throw new IllegalArgumentException("Address must be resolved!");
      }
    }
  
    public static SFProxy fromProto(ProxyProto proto) {
      return new SFProxy(
        ProxyType.valueOf(proto.getType().name()),
        SocketAddressHelper.deserialize(proto.getAddress()),
        proto.hasUsername() ? proto.getUsername() : null,
        proto.hasPassword() ? proto.getPassword() : null);
    }
  
    public SocketAddress getSocketAddress() {
      return address;
    }
  
    public ProxyProto toProto() {
      var builder =
        ProxyProto.newBuilder()
          .setType(ProxyProto.Type.valueOf(type.name()))
          .setAddress(SocketAddressHelper.serialize(address));
  
      if (username != null) {
        builder.setUsername(username);
      }
  
      if (password != null) {
        builder.setPassword(password);
      }
  
      return builder.build();
    }
  }
  