library/src/main/java/org/apache/fineract/cn/anubis/service/PermissionSegmentMatcher.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.fineract.cn.anubis.service;


import javax.annotation.Nonnull;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import org.apache.fineract.cn.anubis.security.AnubisPrincipal;

/**
 * @author Myrle Krantz
 */
public class PermissionSegmentMatcher {
  final private String permissionSegment;

  private PermissionSegmentMatcher(final String permissionSegment) {
    this.permissionSegment = permissionSegment;
  }

  public boolean isStarSegment() {
    return permissionSegment.equals("*");
  }

  private boolean isUserIdentifierSegment() {
    return permissionSegment.equals("{useridentifier}");
  }

  private boolean isApplicationIdentifierSegment() {
    return permissionSegment.equals("{applicationidentifier}");
  }

  boolean isParameterSegment() {
    return permissionSegment.startsWith("{") && permissionSegment.endsWith("}");
  }

  public String getPermissionSegment() { return permissionSegment; }

  public boolean matches(
          final String requestSegment,
          final AnubisPrincipal principal,
          boolean acceptTokenIntendedForForeignApplication,
          boolean isSu) {
    if (isStarSegment())
      return true;
    else if (isUserIdentifierSegment())
      return requestSegment.equals(principal.getUser());
    else if (acceptTokenIntendedForForeignApplication && isApplicationIdentifierSegment())
      return requestSegment.equals(principal.getForApplicationName());
    else if (!acceptTokenIntendedForForeignApplication && isApplicationIdentifierSegment())
      return requestSegment.equals(principal.getSourceApplicationName());
    else if (isParameterSegment())
      return isSu;
    else
      return permissionSegment.equals(requestSegment);
  }

  static public List<PermissionSegmentMatcher> getServletPathSegmentMatchers(final @Nonnull String servletPath) {
    return Arrays.stream(servletPath.split("/"))
            .map(PermissionSegmentMatcher::new)
            .collect(Collectors.toList());
  }
}