/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Yegor Bugayenko
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.takes.rq;

import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import lombok.EqualsAndHashCode;
import org.takes.Request;
import org.takes.misc.Concat;

/**
 * Request with extra header.
 *
 * <p>The class is immutable and thread-safe.
 *
 * @author Yegor Bugayenko (yegor@teamed.io)
 * @version $Id$
 * @since 0.1
 */
@EqualsAndHashCode(callSuper = true)
public final class RqWithHeader extends RqWrap {

    /**
     * Ctor.
     * @param req Original request
     * @param name Header name
     * @param value Header value
     */
    public RqWithHeader(final Request req, final CharSequence name,
        final CharSequence value) {
        this(req, String.format("%s: %s", name, value));
    }

    /**
     * Ctor.
     * @param req Original request
     * @param header Header to add
     */
    public RqWithHeader(final Request req, final CharSequence header) {
        super(
            new Request() {
                @Override
                public Iterable<String> head() throws IOException {
                    return new Concat<String>(
                        req.head(),
                        Collections.singleton(header.toString())
                    );
                }
                @Override
                public InputStream body() throws IOException {
                    return req.body();
                }
            }
        );
    }
}
