content: /*
   * Copyright 1999-2021 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.nacos.plugin.auth.impl.persistence;
  
  import com.alibaba.nacos.api.model.Page;
  import com.alibaba.nacos.common.utils.StringUtils;
  import com.alibaba.nacos.persistence.datasource.DataSourceService;
  import com.alibaba.nacos.persistence.datasource.DynamicDataSource;
  import com.alibaba.nacos.plugin.auth.impl.persistence.extrnal.AuthExternalPaginationHelperImpl;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.dao.EmptyResultDataAccessException;
  import org.springframework.jdbc.CannotGetJdbcConnectionException;
  import org.springframework.jdbc.core.JdbcTemplate;
  
  import javax.annotation.PostConstruct;
  import java.util.ArrayList;
  import java.util.List;
  
  import static com.alibaba.nacos.plugin.auth.impl.persistence.AuthRowMapperManager.USER_ROW_MAPPER;
  
  /**
   * Implemetation of ExternalUserPersistServiceImpl.
   *
   * @author <a href="mailto:liaochuntao@live.com">liaochuntao</a>
   */
  public class ExternalUserPersistServiceImpl implements UserPersistService {
      
      private static final Logger LOGGER = LoggerFactory.getLogger("com.alibaba.nacos.persistence");
      
      private JdbcTemplate jt;
      
      private String dataSourceType = "";
      
      private static final String PATTERN_STR = "*";
      
      @PostConstruct
      protected void init() {
          DataSourceService dataSource = DynamicDataSource.getInstance().getDataSource();
          jt = dataSource.getJdbcTemplate();
          dataSourceType = dataSource.getDataSourceType();
      }
      
      /**
       * Execute create user operation.
       *
       * @param username username string value.
       * @param password password string value.
       */
      @Override
      public void createUser(String username, String password) {
          String sql = "INSERT INTO users (username, password, enabled) VALUES (?, ?, ?)";
          
          try {
              jt.update(sql, username, password, true);
          } catch (CannotGetJdbcConnectionException e) {
              LOGGER.error("[db-error] " + e.toString(), e);
              throw e;
          }
      }
      
      /**
       * Execute delete user operation.
       *
       * @param username username string value.
       */
      @Override
      public void deleteUser(String username) {
          String sql = "DELETE FROM users WHERE username=?";
          try {
              jt.update(sql, username);
          } catch (CannotGetJdbcConnectionException e) {
              LOGGER.error("[db-error] " + e.toString(), e);
              throw e;
          }
      }
      
      /**
       * Execute update user password operation.
       *
       * @param username username string value.
       * @param password password string value.
       */
      @Override
      public void updateUserPassword(String username, String password) {
          try {
              jt.update("UPDATE users SET password = ? WHERE username=?", password, username);
          } catch (CannotGetJdbcConnectionException e) {
              LOGGER.error("[db-error] " + e.toString(), e);
              throw e;
          }
      }
      
      /**
       * Execute find user by username operation.
       *
       * @param username username string value.
       * @return User model.
       */
      @Override
      public User findUserByUsername(String username) {
          String sql = "SELECT username,password FROM users WHERE username=? ";
          try {
              return this.jt.queryForObject(sql, new Object[] {username}, USER_ROW_MAPPER);
          } catch (CannotGetJdbcConnectionException e) {
              LOGGER.error("[db-error] " + e.toString(), e);
              throw e;
          } catch (EmptyResultDataAccessException e) {
              return null;
          } catch (Exception e) {
              LOGGER.error("[db-other-error]" + e.getMessage(), e);
              throw new RuntimeException(e);
          }
      }
      
      @Override
      public Page<User> getUsers(int pageNo, int pageSize, String username) {
          
          AuthPaginationHelper<User> helper = createPaginationHelper();
          
          String sqlCountRows = "SELECT count(*) FROM users ";
          
          String sqlFetchRows = "SELECT username,password FROM users ";
          
          StringBuilder where = new StringBuilder(" WHERE 1 = 1 ");
          List<String> params = new ArrayList<>();
          if (StringUtils.isNotBlank(username)) {
              where.append(" AND username = ? ");
              params.add(username);
          }
          
          try {
              Page<User> pageInfo = helper.fetchPage(sqlCountRows + where, sqlFetchRows + where, params.toArray(), pageNo,
                      pageSize, USER_ROW_MAPPER);
              if (pageInfo == null) {
                  pageInfo = new Page<>();
                  pageInfo.setTotalCount(0);
                  pageInfo.setPageItems(new ArrayList<>());
              }
              return pageInfo;
          } catch (CannotGetJdbcConnectionException e) {
              LOGGER.error("[db-error] " + e.toString(), e);
              throw e;
          }
      }
      
      @Override
      public List<String> findUserLikeUsername(String username) {
          String sql = "SELECT username FROM users WHERE username LIKE ?";
          List<String> users = this.jt.queryForList(sql, new String[] {String.format("%%%s%%", username)}, String.class);
          return users;
      }
      
      @Override
      public Page<User> findUsersLike4Page(String username, int pageNo, int pageSize) {
          String sqlCountRows = "SELECT count(*) FROM users ";
          String sqlFetchRows = "SELECT username,password FROM users ";
          
          StringBuilder where = new StringBuilder(" WHERE 1 = 1 ");
          List<String> params = new ArrayList<>();
          if (StringUtils.isNotBlank(username)) {
              where.append(" AND username LIKE ? ");
              params.add(generateLikeArgument(username));
          }
          
          AuthPaginationHelper<User> helper = createPaginationHelper();
          try {
              return helper.fetchPage(sqlCountRows + where, sqlFetchRows + where, params.toArray(), pageNo, pageSize,
                      USER_ROW_MAPPER);
          } catch (CannotGetJdbcConnectionException e) {
              LOGGER.error("[db-error] " + e.toString(), e);
              throw e;
          }
      }
      
      @Override
      public String generateLikeArgument(String s) {
          String underscore = "_";
          if (s.contains(underscore)) {
              s = s.replaceAll(underscore, "\\\\_");
          }
          String fuzzySearchSign = "\\*";
          String sqlLikePercentSign = "%";
          if (s.contains(PATTERN_STR)) {
              return s.replaceAll(fuzzySearchSign, sqlLikePercentSign);
          } else {
              return s;
          }
      }
      
      @Override
      public <E> AuthPaginationHelper<E> createPaginationHelper() {
          return new AuthExternalPaginationHelperImpl<>(jt, dataSourceType);
      }
  }
  