content: /*
   * Copyright 1999-2018 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.naming.consistency;
  
  import com.alibaba.nacos.naming.misc.UtilsAndCommons;
  import org.apache.commons.lang3.StringUtils;
  
  /**
   * Key operations for data
   *
   * @author nkorange
   * @since 1.0.0
   */
  public class KeyBuilder {
  
      public static final String NAMESPACE_KEY_CONNECTOR = "##";
  
      private static final String EPHEMERAL_KEY_PREFIX = "ephemeral.";
  
      public static final String SERVICE_META_KEY_PREFIX = "com.alibaba.nacos.naming.domains.meta.";
  
      public static final String INSTANCE_LIST_KEY_PREFIX = "com.alibaba.nacos.naming.iplist.";
  
      public static final String BRIEF_SERVICE_META_KEY_PREFIX = "meta.";
  
      public static final String BRIEF_INSTANCE_LIST_KEY_PREFIX = "iplist.";
  
      private static String buildEphemeralInstanceListKey(String namespaceId, String serviceName) {
          return INSTANCE_LIST_KEY_PREFIX + EPHEMERAL_KEY_PREFIX + namespaceId + NAMESPACE_KEY_CONNECTOR
              + serviceName;
      }
  
      private static String buildPersistentInstanceListKey(String namespaceId, String serviceName) {
          return INSTANCE_LIST_KEY_PREFIX + namespaceId + NAMESPACE_KEY_CONNECTOR
              + serviceName;
      }
  
      public static String buildInstanceListKey(String namespaceId, String serviceName, boolean ephemeral) {
          return ephemeral ? buildEphemeralInstanceListKey(namespaceId, serviceName) :
              buildPersistentInstanceListKey(namespaceId, serviceName);
      }
  
      public static String buildServiceMetaKey(String namespaceId, String serviceName) {
          return SERVICE_META_KEY_PREFIX + namespaceId + NAMESPACE_KEY_CONNECTOR + serviceName;
      }
  
      public static String getSwitchDomainKey() {
          return SERVICE_META_KEY_PREFIX + UtilsAndCommons.SWITCH_DOMAIN_NAME;
      }
  
      public static boolean matchEphemeralInstanceListKey(String key) {
          return key.startsWith(INSTANCE_LIST_KEY_PREFIX + EPHEMERAL_KEY_PREFIX);
      }
  
      public static boolean matchInstanceListKey(String key) {
          return key.startsWith(INSTANCE_LIST_KEY_PREFIX) || key.startsWith(BRIEF_INSTANCE_LIST_KEY_PREFIX);
      }
  
      public static boolean matchServiceMetaKey(String key) {
          return key.startsWith(SERVICE_META_KEY_PREFIX) || key.startsWith(BRIEF_SERVICE_META_KEY_PREFIX);
      }
  
      public static boolean matchSwitchKey(String key) {
          return key.endsWith(UtilsAndCommons.SWITCH_DOMAIN_NAME);
      }
  
      public static boolean matchServiceName(String key, String namespaceId, String serviceName) {
          return key.endsWith(namespaceId + NAMESPACE_KEY_CONNECTOR + serviceName);
      }
  
      public static boolean matchServiceMetaKey(String key, String namespaceId, String serviceName) {
          return matchServiceMetaKey(key) && matchServiceName(key, namespaceId, serviceName);
      }
  
      public static boolean matchInstanceListKey(String key, String namespaceId, String serviceName) {
          return matchInstanceListKey(key) && matchServiceName(key, namespaceId, serviceName);
      }
  
      public static boolean matchEphemeralKey(String key) {
          // currently only instance list has ephemeral type:
          return matchEphemeralInstanceListKey(key);
      }
  
      public static boolean matchPersistentKey(String key) {
          return !matchEphemeralKey(key);
      }
  
      public static String briefInstanceListkey(String key) {
          return BRIEF_INSTANCE_LIST_KEY_PREFIX + key.split(INSTANCE_LIST_KEY_PREFIX)[1];
      }
  
      public static String briefServiceMetaKey(String key) {
          return BRIEF_SERVICE_META_KEY_PREFIX + key.split(SERVICE_META_KEY_PREFIX)[1];
      }
  
      public static String detailInstanceListkey(String key) {
          return INSTANCE_LIST_KEY_PREFIX.substring(0, INSTANCE_LIST_KEY_PREFIX.indexOf(BRIEF_INSTANCE_LIST_KEY_PREFIX))
              + key;
      }
  
      public static String detailServiceMetaKey(String key) {
          return SERVICE_META_KEY_PREFIX.substring(0, SERVICE_META_KEY_PREFIX.indexOf(BRIEF_SERVICE_META_KEY_PREFIX))
              + key;
      }
  
      public static String getNamespace(String key) {
  
          if (matchSwitchKey(key)) {
              return StringUtils.EMPTY;
          }
  
          if (matchServiceMetaKey(key)) {
              return key.split(NAMESPACE_KEY_CONNECTOR)[0].substring(SERVICE_META_KEY_PREFIX.length());
          }
  
          if (matchEphemeralInstanceListKey(key)) {
              return key.split(NAMESPACE_KEY_CONNECTOR)[0].substring(INSTANCE_LIST_KEY_PREFIX.length() + EPHEMERAL_KEY_PREFIX.length());
          }
  
          if (matchInstanceListKey(key)) {
              return key.split(NAMESPACE_KEY_CONNECTOR)[0].substring(INSTANCE_LIST_KEY_PREFIX.length());
          }
  
          return StringUtils.EMPTY;
      }
  
      public static String getServiceName(String key) {
          return key.split(NAMESPACE_KEY_CONNECTOR)[1];
      }
  }
  