/*
 * Copyright (C) 2013-2016 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. AND ITS CONTRIBUTORS ``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 ITS 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 "NetworkBlobRegistry.h"

#include "BlobDataFileReferenceWithSandboxExtension.h"
#include "NetworkConnectionToWebProcess.h"
#include "SandboxExtension.h"
#include <WebCore/BlobPart.h>
#include <WebCore/BlobRegistryImpl.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/RunLoop.h>

namespace WebKit {
using namespace WebCore;

NetworkBlobRegistry::NetworkBlobRegistry() = default;
NetworkBlobRegistry::~NetworkBlobRegistry() = default;

void NetworkBlobRegistry::registerFileBlobURL(NetworkConnectionToWebProcess& connection, const URL& url, const String& path, RefPtr<SandboxExtension>&& sandboxExtension, const String& contentType)
{
    m_blobRegistry.registerFileBlobURL(url, BlobDataFileReferenceWithSandboxExtension::create(path, WTFMove(sandboxExtension)), contentType);

    ASSERT(!m_blobsForConnection.get(&connection).contains(url));
    BlobForConnectionMap::iterator mapIterator = m_blobsForConnection.find(&connection);
    if (mapIterator == m_blobsForConnection.end())
        mapIterator = m_blobsForConnection.add(&connection, HashSet<URL>()).iterator;
    mapIterator->value.add(url);
}

void NetworkBlobRegistry::registerBlobURL(NetworkConnectionToWebProcess& connection, const URL& url, Vector<WebCore::BlobPart>&& blobParts, const String& contentType)
{
    m_blobRegistry.registerBlobURL(url, WTFMove(blobParts), contentType);

    ASSERT(!m_blobsForConnection.get(&connection).contains(url));
    BlobForConnectionMap::iterator mapIterator = m_blobsForConnection.find(&connection);
    if (mapIterator == m_blobsForConnection.end())
        mapIterator = m_blobsForConnection.add(&connection, HashSet<URL>()).iterator;
    mapIterator->value.add(url);
}

void NetworkBlobRegistry::registerBlobURL(NetworkConnectionToWebProcess& connection, const URL& url, const URL& srcURL, bool shouldBypassConnectionCheck)
{
    // The connection may not be registered if NetworkProcess prevously crashed for any reason.
    BlobForConnectionMap::iterator mapIterator = m_blobsForConnection.find(&connection);
    if (mapIterator == m_blobsForConnection.end()) {
        if (!shouldBypassConnectionCheck)
            return;
        mapIterator = m_blobsForConnection.add(&connection, HashSet<URL>()).iterator;
    }

    m_blobRegistry.registerBlobURL(url, srcURL);

    ASSERT(shouldBypassConnectionCheck || mapIterator->value.contains(srcURL));
    mapIterator->value.add(url);
}

void NetworkBlobRegistry::registerBlobURLOptionallyFileBacked(NetworkConnectionToWebProcess& connection, const URL& url, const URL& srcURL, const String& fileBackedPath, const String& contentType)
{
    m_blobRegistry.registerBlobURLOptionallyFileBacked(url, srcURL, BlobDataFileReferenceWithSandboxExtension::create(fileBackedPath, nullptr), contentType);

    ASSERT(!m_blobsForConnection.get(&connection).contains(url));
    BlobForConnectionMap::iterator mapIterator = m_blobsForConnection.find(&connection);
    if (mapIterator == m_blobsForConnection.end())
        mapIterator = m_blobsForConnection.add(&connection, HashSet<URL>()).iterator;
    mapIterator->value.add(url);
}

void NetworkBlobRegistry::registerBlobURLForSlice(NetworkConnectionToWebProcess& connection, const URL& url, const URL& srcURL, int64_t start, int64_t end)
{
    // The connection may not be registered if NetworkProcess prevously crashed for any reason.
    BlobForConnectionMap::iterator mapIterator = m_blobsForConnection.find(&connection);
    if (mapIterator == m_blobsForConnection.end())
        return;

    m_blobRegistry.registerBlobURLForSlice(url, srcURL, start, end);

    ASSERT(mapIterator->value.contains(srcURL));
    mapIterator->value.add(url);
}

void NetworkBlobRegistry::unregisterBlobURL(NetworkConnectionToWebProcess& connection, const URL& url)
{
    // The connection may not be registered if NetworkProcess prevously crashed for any reason.
    BlobForConnectionMap::iterator mapIterator = m_blobsForConnection.find(&connection);
    if (mapIterator == m_blobsForConnection.end())
        return;

    m_blobRegistry.unregisterBlobURL(url);

    mapIterator->value.remove(url);
}

uint64_t NetworkBlobRegistry::blobSize(NetworkConnectionToWebProcess& connection, const URL& url)
{
    if (!m_blobsForConnection.contains(&connection) || !m_blobsForConnection.find(&connection)->value.contains(url))
        return 0;

    return m_blobRegistry.blobSize(url);
}

void NetworkBlobRegistry::writeBlobsToTemporaryFiles(const Vector<String>& blobURLs, CompletionHandler<void(Vector<String>&&)>&& completionHandler)
{
    m_blobRegistry.writeBlobsToTemporaryFiles(blobURLs, WTFMove(completionHandler));
}

void NetworkBlobRegistry::writeBlobToFilePath(const URL& blobURL, const String& path, CompletionHandler<void(bool success)>&& completionHandler)
{
    if (!m_blobRegistry.isBlobRegistryImpl()) {
        completionHandler(false);
        ASSERT_NOT_REACHED();
        return;
    }

    auto blobFiles = filesInBlob({ { }, blobURL });
    for (auto& file : blobFiles)
        file->prepareForFileAccess();

    m_blobRegistry.writeBlobToFilePath(blobURL, path, [blobFiles = WTFMove(blobFiles), completionHandler = WTFMove(completionHandler)] (bool success) mutable {
        for (auto& file : blobFiles)
            file->revokeFileAccess();
        completionHandler(success);
    });
}

void NetworkBlobRegistry::connectionToWebProcessDidClose(NetworkConnectionToWebProcess& connection)
{
    if (!m_blobsForConnection.contains(&connection))
        return;

    HashSet<URL>& blobsForConnection = m_blobsForConnection.find(&connection)->value;
    for (HashSet<URL>::iterator iter = blobsForConnection.begin(), end = blobsForConnection.end(); iter != end; ++iter)
        m_blobRegistry.unregisterBlobURL(*iter);

    m_blobsForConnection.remove(&connection);
}

Vector<RefPtr<BlobDataFileReference>> NetworkBlobRegistry::filesInBlob(NetworkConnectionToWebProcess& connection, const URL& url)
{
    if (!m_blobsForConnection.contains(&connection) || !m_blobsForConnection.find(&connection)->value.contains(url))
        return { };

    return filesInBlob(url);
}

}