/*

 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package jdk.internal.net.http;

import java.io.IOException;

import java.net.CookieHandler;

import java.util.List;

import java.util.Map;

import java.util.Optional;

import java.net.http.HttpHeaders;

import jdk.internal.net.http.common.HttpHeadersBuilder;

import jdk.internal.net.http.common.Log;

import jdk.internal.net.http.common.Utils;

class CookieFilter implements HeaderFilter {

    public CookieFilter() {

    }

    @Override

    public void request(HttpRequestImpl r, MultiExchange<?> e) throws IOException {

        HttpClientImpl client = e.client();

        Optional<CookieHandler> cookieHandlerOpt = client.cookieHandler();

        if (cookieHandlerOpt.isPresent()) {

            CookieHandler cookieHandler = cookieHandlerOpt.get();

            Map<String,List<String>> userheaders = r.getUserHeaders().map();

            Map<String,List<String>> cookies = cookieHandler.get(r.uri(), userheaders);

            // add the returned cookies

            HttpHeadersBuilder systemHeadersBuilder = r.getSystemHeadersBuilder();

            if (cookies.isEmpty()) {

                Log.logTrace("Request: no cookie to add for {0}", r.uri());

            } else {

                Log.logTrace("Request: adding cookies for {0}", r.uri());

            }

            for (Map.Entry<String,List<String>> entry : cookies.entrySet()) {

                final String hdrname = entry.getKey();

                if (!hdrname.equalsIgnoreCase("Cookie")

                        && !hdrname.equalsIgnoreCase("Cookie2"))

                    continue;

                List<String> values = entry.getValue();

                if (values == null || values.isEmpty()) continue;

                for (String val : values) {

                    if (Utils.isValidValue(val)) {

                        systemHeadersBuilder.addHeader(hdrname, val);

                    }

                }

            }

        } else {

            Log.logTrace("Request: No cookie manager found for {0}", r.uri());

        }

    }

    @Override

    public HttpRequestImpl response(Response r) throws IOException {

        HttpHeaders hdrs = r.headers();

        HttpRequestImpl request = r.request();

        Exchange<?> e = r.exchange;

        Log.logTrace("Response: processing cookies for {0}", request.uri());

        Optional<CookieHandler> cookieHandlerOpt = e.client().cookieHandler();

        if (cookieHandlerOpt.isPresent()) {

            CookieHandler cookieHandler = cookieHandlerOpt.get();

            Log.logTrace("Response: parsing cookies from {0}", hdrs.map());

            cookieHandler.put(request.uri(), hdrs.map());

        } else {

            Log.logTrace("Response: No cookie manager found for {0}",

                         request.uri());

        }

        return null;

    }

}