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.*;
  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 ShowUser {
  
      private ShowUser() {
      }
  
      private static final int FIELD_COUNT = 4;
      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("Username", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("Manager", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("Readonly", Fields.FIELD_TYPE_VAR_STRING);
          FIELDS[i++].setPacketId(++packetId);
  
          FIELDS[i] = PacketUtil.getField("Max_con", Fields.FIELD_TYPE_VAR_STRING);
          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> users = DbleServer.getInstance().getConfig().getUsers();
          for (Map.Entry<UserName, UserConfig> entry : users.entrySet()) {
              RowDataPacket row = getRow(entry.getValue(), 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(UserConfig user, String charset) {
          RowDataPacket row = new RowDataPacket(FIELD_COUNT);
          if (user instanceof ShardingUserConfig) { // contains HybridTAUserConfig
              ShardingUserConfig shardingUser = (ShardingUserConfig) user;
              if (shardingUser.getTenant() != null) {
                  row.add(StringUtil.encode(shardingUser.getName() + ":" + shardingUser.getTenant(), charset));
              } else {
                  row.add(StringUtil.encode(shardingUser.getName(), charset));
              }
              row.add(StringUtil.encode("N", charset));
              row.add(StringUtil.encode(shardingUser.isReadOnly() ? "Y" : "N", charset));
              int maxCon = shardingUser.getMaxCon();
              row.add(StringUtil.encode(maxCon == 0 ? "no limit" : maxCon + "", charset));
          } else if (user instanceof ManagerUserConfig) {
              ManagerUserConfig mUser = (ManagerUserConfig) user;
              row.add(StringUtil.encode(user.getName(), charset));
              row.add(StringUtil.encode("Y", charset));
              row.add(StringUtil.encode(mUser.isReadOnly() ? "Y" : "N", charset));
              int maxCon = mUser.getMaxCon();
              row.add(StringUtil.encode(maxCon == 0 ? "no limit" : maxCon + "", charset));
          } else if (user instanceof RwSplitUserConfig) {
              RwSplitUserConfig rUser = (RwSplitUserConfig) user;
              if (rUser.getTenant() != null) {
                  row.add(StringUtil.encode(rUser.getName() + ":" + rUser.getTenant(), charset));
              } else {
                  row.add(StringUtil.encode(rUser.getName(), charset));
              }
              row.add(StringUtil.encode("N", charset));
              row.add(StringUtil.encode("-", charset));
              int maxCon = rUser.getMaxCon();
              row.add(StringUtil.encode(maxCon == 0 ? "no limit" : maxCon + "", charset));
          } else {
              AnalysisUserConfig aUser = (AnalysisUserConfig) user;
              if (aUser.getTenant() != null) {
                  row.add(StringUtil.encode(aUser.getName() + ":" + aUser.getTenant(), charset));
              } else {
                  row.add(StringUtil.encode(aUser.getName(), charset));
              }
              row.add(StringUtil.encode("N", charset));
              row.add(StringUtil.encode("-", charset));
              int maxCon = aUser.getMaxCon();
              row.add(StringUtil.encode(maxCon == 0 ? "no limit" : maxCon + "", charset));
          }
          return row;
      }
  
  }
  