/*
 * Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>
 * Copyright (C) 2023-2025 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 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 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 "CachedScriptFetcher.h"

#include "CachedScript.h"
#include "ContentSecurityPolicy.h"
#include "CrossOriginAccessControl.h"
#include "DocumentResourceLoader.h"
#include "Settings.h"
#include "WorkerOrWorkletGlobalScope.h"

namespace WebCore {

Ref<CachedScriptFetcher> CachedScriptFetcher::create(const AtomString& charset)
{
    return adoptRef(*new CachedScriptFetcher(charset));
}

CachedResourceHandle<CachedScript> CachedScriptFetcher::requestModuleScript(Document& document, const URL& sourceURL, FetchOptionsDestination destination, String&& integrity, std::optional<ServiceWorkersMode> serviceWorkersMode) const
{
    return requestScriptWithCache(document, sourceURL, destination, String { }, WTF::move(integrity), { }, serviceWorkersMode);
}

RefPtr<CachedScript> CachedScriptFetcher::requestScriptWithCache(Document& document, const URL& sourceURL, FetchOptionsDestination destination, const String& crossOriginMode, String&& integrity, std::optional<ResourceLoadPriority> resourceLoadPriority, std::optional<ServiceWorkersMode> serviceWorkersMode) const
{
    if (!document.settings().isScriptEnabled())
        return nullptr;

    ASSERT(document.contentSecurityPolicy());
    bool hasKnownNonce = protect(document.contentSecurityPolicy())->allowScriptWithNonce(m_nonce, m_isInUserAgentShadowTree);
    ResourceLoaderOptions options = CachedResourceLoader::defaultCachedResourceOptions();
    options.contentSecurityPolicyImposition = hasKnownNonce ? ContentSecurityPolicyImposition::SkipPolicyCheck : ContentSecurityPolicyImposition::DoPolicyCheck;
    options.sameOriginDataURLFlag = SameOriginDataURLFlag::Set;
    options.serviceWorkersMode = serviceWorkersMode.value_or(ServiceWorkersMode::All);
    options.integrity = WTF::move(integrity);
    options.referrerPolicy = m_referrerPolicy;
    options.fetchPriority = m_fetchPriority;
    options.nonce = m_nonce;
    options.destination = destination;
    ASSERT(destination == FetchOptionsDestination::Script || destination == FetchOptionsDestination::Json);

    auto request = createPotentialAccessControlRequest(URL { sourceURL }, WTF::move(options), document, crossOriginMode);
    request.upgradeInsecureRequestIfNeeded(document);
    request.setCharset(m_charset);
    request.setPriority(WTF::move(resourceLoadPriority));
    if (!m_initiatorType.isNull())
        request.setInitiatorType(m_initiatorType);

    auto result = protect(document.cachedResourceLoader())->requestScript(WTF::move(request));
    return result ? RefPtr { WTF::move(result.value()) } : nullptr;
}

}
