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/*
 * Copyright (c) 2014 AsyncHttpClient Project. All rights reserved.
 *
 * This program is licensed to you under the Apache License Version 2.0,
 * and you may not use this file except in compliance with the Apache License Version 2.0.
 * You may obtain a copy of the Apache License Version 2.0 at
 *     http://www.apache.org/licenses/LICENSE-2.0.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the Apache License Version 2.0 is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
 */
package com.ning.http.client;

import static com.ning.http.util.MiscUtils.isNonEmpty;

import com.ning.http.client.cookie.Cookie;
import com.ning.http.client.uri.Uri;
import com.ning.http.util.AsyncHttpProviderUtils;

import java.nio.charset.Charset;
import java.util.Collections;
import java.util.List;

public abstract class ResponseBase implements Response {

    protected final HttpResponseStatus status;
    protected final HttpResponseHeaders headers;
    protected final List bodyParts;
    private List cookies;

    protected ResponseBase(HttpResponseStatus status, HttpResponseHeaders headers, List bodyParts) {
        this.bodyParts = bodyParts;
        this.headers = headers;
        this.status = status;
    }

    protected abstract List buildCookies();

    protected Charset calculateCharset(String charset) {

        if (charset == null) {
            String contentType = getContentType();
            if (contentType != null)
                charset = AsyncHttpProviderUtils.parseCharset(contentType); // parseCharset can return null
        }
        return charset != null ? Charset.forName(charset) : AsyncHttpProviderUtils.DEFAULT_CHARSET;
    }

    @Override
    public final int getStatusCode() {
        return status.getStatusCode();
    }

    @Override
    public final String getStatusText() {
        return status.getStatusText();
    }

    @Override
    public final Uri getUri() {
        return status.getUri();
    }

    @Override
    public final String getContentType() {
        return headers != null ? getHeader("Content-Type") : null;
    }

    @Override
    public final String getHeader(String name) {
        return headers != null ? getHeaders().getFirstValue(name) : null;
    }

    @Override
    public final List getHeaders(String name) {
        return headers != null ? getHeaders().get(name) : Collections. emptyList();
    }

    @Override
    public final FluentCaseInsensitiveStringsMap getHeaders() {
        return headers != null ? headers.getHeaders() : new FluentCaseInsensitiveStringsMap();
    }

    @Override
    public final boolean isRedirected() {
        switch (status.getStatusCode()) {
        case 301:
        case 302:
        case 303:
        case 307:
        case 308:
            return true;
        default:
            return false;
        }
    }

    @Override
    public List getCookies() {
        if (cookies == null)
            cookies = headers != null ? buildCookies() : Collections. emptyList();
        return cookies;

    }

    @Override
    public boolean hasResponseStatus() {
        return status != null;
    }

    @Override
    public boolean hasResponseHeaders() {
        return headers != null && isNonEmpty(headers.getHeaders());
    }

    @Override
    public boolean hasResponseBody() {
        return isNonEmpty(bodyParts);
    }
}