/*
 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "config.h"
#include "CookieJar.h"

#include "KURL.h"
#include "PlatformString.h"
#include "Document.h"
#include "ResourceHandle.h"
#include <windows.h>
#if USE(CFNETWORK)
#include <CoreFoundation/CoreFoundation.h>
#include <CFNetwork/CFHTTPCookiesPriv.h>
#include <WebKitSystemInterface/WebKitSystemInterface.h>
#else
#include <Wininet.h>
#endif

// FIXME: This should be broken up into CookieJarCFNet.cpp and CookieJarWin.cpp or CookieJarWinINet.cpp.

namespace WebCore {

#if USE(CFNETWORK)
    static const CFStringRef s_setCookieKeyCF = CFSTR("Set-Cookie");
    static const CFStringRef s_cookieCF = CFSTR("Cookie");
#endif


void setCookies(Document* /*document*/, const KURL& url, const KURL& policyURL, const String& value)
{
#if USE(CFNETWORK)
    // <rdar://problem/5632883> CFHTTPCookieStorage happily stores an empty cookie, which would be sent as "Cookie: =".
    if (value.isEmpty())
        return;

    CFHTTPCookieStorageRef defaultCookieStorage = wkGetDefaultHTTPCookieStorage();
    if (!defaultCookieStorage)
        return;

    RetainPtr<CFURLRef> urlCF(AdoptCF, url.createCFURL());
    RetainPtr<CFURLRef> policyURLCF(AdoptCF, policyURL.createCFURL());

    // <http://bugzilla.opendarwin.org/show_bug.cgi?id=6531>, <rdar://4409034>
    // cookiesWithResponseHeaderFields doesn't parse cookies without a value
    String cookieString = value.contains('=') ? value : value + "=";

    RetainPtr<CFStringRef> cookieStringCF(AdoptCF, cookieString.createCFString());
    RetainPtr<CFDictionaryRef> headerFieldsCF(AdoptCF, CFDictionaryCreate(kCFAllocatorDefault, (const void**)&s_setCookieKeyCF, 
        (const void**)&cookieStringCF, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks));

    RetainPtr<CFArrayRef> cookiesCF(AdoptCF, CFHTTPCookieCreateWithResponseHeaderFields(kCFAllocatorDefault,
        headerFieldsCF.get(), urlCF.get()));

    CFHTTPCookieStorageSetCookies(defaultCookieStorage, cookiesCF.get(), urlCF.get(), policyURLCF.get());
#else
    // FIXME: Deal with the policy URL.
    String str = url.string();
    String val = value;
    InternetSetCookie(str.charactersWithNullTermination(), 0, val.charactersWithNullTermination());
#endif
}

String cookies(const Document* /*document*/, const KURL& url)
{
#if USE(CFNETWORK)
    CFHTTPCookieStorageRef defaultCookieStorage = wkGetDefaultHTTPCookieStorage();
    if (!defaultCookieStorage)
        return String();

    String cookieString;
    RetainPtr<CFURLRef> urlCF(AdoptCF, url.createCFURL());

    bool secure = equalIgnoringCase(url.protocol(), "https");

    RetainPtr<CFArrayRef> cookiesCF(AdoptCF, CFHTTPCookieStorageCopyCookiesForURL(defaultCookieStorage, urlCF.get(), secure));

    // <rdar://problem/5632883> CFHTTPCookieStorage happily stores an empty cookie, which would be sent as "Cookie: =".
    // We have a workaround in setCookies() to prevent that, but we also need to avoid sending cookies that were previously stored.
    CFIndex count = CFArrayGetCount(cookiesCF.get());
    RetainPtr<CFMutableArrayRef> cookiesForURLFilteredCopy(AdoptCF, CFArrayCreateMutable(0, count, &kCFTypeArrayCallBacks));
    for (CFIndex i = 0; i < count; ++i) {
        CFHTTPCookieRef cookie = (CFHTTPCookieRef)CFArrayGetValueAtIndex(cookiesCF.get(), i);
        if (CFStringGetLength(CFHTTPCookieGetName(cookie)) != 0)
            CFArrayAppendValue(cookiesForURLFilteredCopy.get(), cookie);
    }
    RetainPtr<CFDictionaryRef> headerCF(AdoptCF, CFHTTPCookieCopyRequestHeaderFields(kCFAllocatorDefault, cookiesForURLFilteredCopy.get()));

    return (CFStringRef)CFDictionaryGetValue(headerCF.get(), s_cookieCF);
#else
    String str = url.string();

    DWORD count = str.length() + 1;
    InternetGetCookie(str.charactersWithNullTermination(), 0, 0, &count);
    if (count <= 1) // Null terminator counts as 1.
        return String();

    Vector<UChar> buffer(count);
    InternetGetCookie(buffer.data(), 0, buffer, &count);
    buffer.shrink(count - 1); // Ignore the null terminator.
    return String::adopt(buffer);
#endif
}

bool cookiesEnabled(const Document* /*document*/)
{
    CFHTTPCookieStorageAcceptPolicy policy = CFHTTPCookieStorageAcceptPolicyOnlyFromMainDocumentDomain;
    if (CFHTTPCookieStorageRef defaultCookieStorage = wkGetDefaultHTTPCookieStorage())
        policy = CFHTTPCookieStorageGetCookieAcceptPolicy(defaultCookieStorage);
    return policy == CFHTTPCookieStorageAcceptPolicyOnlyFromMainDocumentDomain || policy == CFHTTPCookieStorageAcceptPolicyAlways;
}

}
