/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.http.impl.cookie;
  
  import org.apache.http.annotation.Immutable;
  import org.apache.http.cookie.Cookie;
  import org.apache.http.cookie.CookieAttributeHandler;
  import org.apache.http.cookie.CookieOrigin;
  import org.apache.http.cookie.CookieRestrictionViolationException;
  import org.apache.http.cookie.MalformedCookieException;
  import org.apache.http.cookie.SetCookie;
  import org.apache.http.util.Args;
  
  /**
   *
   * @since 4.0
   */
  @Immutable
  public class BasicPathHandler implements CookieAttributeHandler {
  
      public BasicPathHandler() {
          super();
      }
  
      public void parse(final SetCookie cookie, String value)
              throws MalformedCookieException {
          Args.notNull(cookie, "Cookie");
          if (value == null || value.trim().length() == 0) {
              value = "/";
          }
          cookie.setPath(value);
      }
  
      public void validate(final Cookie cookie, final CookieOrigin origin)
              throws MalformedCookieException {
          if (!match(cookie, origin)) {
              throw new CookieRestrictionViolationException(
                  "Illegal path attribute \"" + cookie.getPath()
                  + "\". Path of origin: \"" + origin.getPath() + "\"");
          }
      }
  
      public boolean match(final Cookie cookie, final CookieOrigin origin) {
          Args.notNull(cookie, "Cookie");
          Args.notNull(origin, "Cookie origin");
          final String targetpath = origin.getPath();
          String topmostPath = cookie.getPath();
          if (topmostPath == null) {
              topmostPath = "/";
          }
          if (topmostPath.length() > 1 && topmostPath.endsWith("/")) {
              topmostPath = topmostPath.substring(0, topmostPath.length() - 1);
          }
          boolean match = targetpath.startsWith (topmostPath);
          // if there is a match and these values are not exactly the same we have
          // to make sure we're not matcing "/foobar" and "/foo"
          if (match && targetpath.length() != topmostPath.length()) {
              if (!topmostPath.endsWith("/")) {
                  match = (targetpath.charAt(topmostPath.length()) == '/');
              }
          }
          return match;
      }
  
  }