content: /*
   * Copyright (C) 2016-2023 ActionTech.
   * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher.
   */
  
  package com.actiontech.dble.services.manager.response;
  
  import com.actiontech.dble.DbleServer;
  import com.actiontech.dble.backend.mysql.PacketUtil;
  import com.actiontech.dble.config.Fields;
  import com.actiontech.dble.config.model.user.UserConfig;
  import com.actiontech.dble.config.model.user.UserName;
  import com.actiontech.dble.net.mysql.*;
  import com.actiontech.dble.services.manager.ManagerService;
  import com.actiontech.dble.util.StringUtil;
  
  import java.nio.ByteBuffer;
  import java.util.Map;
  
  public final class ShowWhiteHost {
      private ShowWhiteHost() {
      }
  
      private static final int FIELD_COUNT = 2;
      private static final ResultSetHeaderPacket HEADER = PacketUtil.getHeader(FIELD_COUNT);
      private static final FieldPacket[] FIELDS = new FieldPacket[FIELD_COUNT];
      private static final EOFPacket EOF = new EOFPacket();
  
      static {
          int i = 0;
          byte packetId = 0;
          HEADER.setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("IP", Fields.FIELD_TYPE_VARCHAR);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("USER", Fields.FIELD_TYPE_VARCHAR);
          FIELDS[i].setPacketId(++packetId);
  
  
          EOF.setPacketId(++packetId);
      }
  
      public static void execute(ManagerService service) {
          ByteBuffer buffer = service.allocate();
  
          // write header
          buffer = HEADER.write(buffer, service, true);
  
          // write fields
          for (FieldPacket field : FIELDS) {
              buffer = field.write(buffer, service, true);
          }
  
          // write eof
          buffer = EOF.write(buffer, service, true);
  
          // write rows
          byte packetId = EOF.getPacketId();
  
          Map<UserName, UserConfig> map = DbleServer.getInstance().getConfig().getUsers();
          for (Map.Entry<UserName, UserConfig> entry : map.entrySet()) {
              if (entry.getValue().getWhiteIPs().size() > 0) {
                  for (String whiteIP : entry.getValue().getWhiteIPs()) {
                      RowDataPacket row = getRow(whiteIP, entry.getKey().getFullName(), service.getCharset().getResults());
                      row.setPacketId(++packetId);
                      buffer = row.write(buffer, service, true);
                  }
              }
          }
  
          // write last eof
          EOFRowPacket lastEof = new EOFRowPacket();
          lastEof.setPacketId(++packetId);
  
  
          lastEof.write(buffer, service);
  
      }
  
      private static RowDataPacket getRow(String ip, String user, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          row.add(StringUtil.encode(ip, charset));
          row.add(StringUtil.encode(user, charset));
          return row;
      }
  
  
  }
  