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//
//  ========================================================================
//  Copyright (c) 1995-2018 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.util;

import java.net.CookieManager;
import java.net.CookieStore;
import java.net.HttpCookie;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * Implementation of {@link CookieStore} that delegates to an instance created by {@link CookieManager}
 * via {@link CookieManager#getCookieStore()}.
 */
public class HttpCookieStore implements CookieStore
{
    private final CookieStore delegate;

    public HttpCookieStore()
    {
        delegate = new CookieManager().getCookieStore();
    }

    @Override
    public void add(URI uri, HttpCookie cookie)
    {
        delegate.add(uri, cookie);
    }

    @Override
    public List get(URI uri)
    {
        return delegate.get(uri);
    }

    @Override
    public List getCookies()
    {
        return delegate.getCookies();
    }

    @Override
    public List getURIs()
    {
        return delegate.getURIs();
    }

    @Override
    public boolean remove(URI uri, HttpCookie cookie)
    {
        return delegate.remove(uri, cookie);
    }

    @Override
    public boolean removeAll()
    {
        return delegate.removeAll();
    }

    public static List matchPath(URI uri, List cookies)
    {
        if (cookies == null || cookies.isEmpty())
            return Collections.emptyList();
        List result = new ArrayList<>(4);
        String path = uri.getPath();
        if (path == null || path.trim().isEmpty())
            path = "/";
        for (HttpCookie cookie : cookies)
        {
            String cookiePath = cookie.getPath();
            if (cookiePath == null)
            {
                result.add(cookie);
            }
            else
            {
                // RFC 6265, section 5.1.4, path matching algorithm.
                if (path.equals(cookiePath))
                {
                    result.add(cookie);
                }
                else if (path.startsWith(cookiePath))
                {
                    if (cookiePath.endsWith("/") || path.charAt(cookiePath.length()) == '/')
                        result.add(cookie);
                }
            }
        }
        return result;
    }

    public static class Empty implements CookieStore
    {
        @Override
        public void add(URI uri, HttpCookie cookie)
        {
        }

        @Override
        public List get(URI uri)
        {
            return Collections.emptyList();
        }

        @Override
        public List getCookies()
        {
            return Collections.emptyList();
        }

        @Override
        public List getURIs()
        {
            return Collections.emptyList();
        }

        @Override
        public boolean remove(URI uri, HttpCookie cookie)
        {
            return false;
        }

        @Override
        public boolean removeAll()
        {
            return false;
        }
    }
}