/*
    * Copyright 2012-2017 CodeLibs Project and the Others.
    *
    * 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 org.codelibs.fess.helper;
  
  import java.util.Locale;
  
  import javax.annotation.Resource;
  
  import org.codelibs.core.lang.StringUtil;
  import org.codelibs.fess.mylasta.direction.FessConfig;
  import org.codelibs.fess.util.ComponentUtil;
  
  public class PermissionHelper {
      protected String rolePrefix = "{role}";
  
      protected String groupPrefix = "{group}";
  
      protected String userPrefix = "{user}";
  
      @Resource
      protected SystemHelper systemHelper;
  
      public String encode(final String value) {
          if (StringUtil.isBlank(value)) {
              return null;
          }
  
          final String permission = value.trim();
          final String lower = permission.toLowerCase(Locale.ROOT);
          if (lower.startsWith(userPrefix)) {
              if (permission.length() > userPrefix.length()) {
                  return systemHelper.getSearchRoleByUser(permission.substring(userPrefix.length()));
              } else {
                  return null;
              }
          } else if (lower.startsWith(groupPrefix)) {
              if (permission.length() > groupPrefix.length()) {
                  return systemHelper.getSearchRoleByGroup(permission.substring(groupPrefix.length()));
              } else {
                  return null;
              }
          } else if (lower.startsWith(rolePrefix)) {
              if (permission.length() > rolePrefix.length()) {
                  return systemHelper.getSearchRoleByRole(permission.substring(rolePrefix.length()));
              } else {
                  return null;
              }
          }
          return permission;
      }
  
      public String decode(final String value) {
          if (StringUtil.isBlank(value)) {
              return null;
          }
  
          final FessConfig fessConfig = ComponentUtil.getFessConfig();
          if (value.startsWith(fessConfig.getRoleSearchUserPrefix()) && value.length() > fessConfig.getRoleSearchUserPrefix().length()) {
              return userPrefix + value.substring(fessConfig.getRoleSearchUserPrefix().length());
          } else if (value.startsWith(fessConfig.getRoleSearchGroupPrefix())
                  && value.length() > fessConfig.getRoleSearchGroupPrefix().length()) {
              return groupPrefix + value.substring(fessConfig.getRoleSearchGroupPrefix().length());
          } else if (value.startsWith(fessConfig.getRoleSearchRolePrefix()) && value.length() > fessConfig.getRoleSearchRolePrefix().length()) {
              return rolePrefix + value.substring(fessConfig.getRoleSearchRolePrefix().length());
          }
          return value;
      }
  
      public void setRolePrefix(final String rolePrefix) {
          this.rolePrefix = rolePrefix;
      }
  
      public void setGroupPrefix(final String groupPrefix) {
          this.groupPrefix = groupPrefix;
      }
  
      public void setUserPrefix(final String userPrefix) {
          this.userPrefix = userPrefix;
      }
  }