Source/WebKit2/WebProcess/WebCoreSupport/WebDatabaseManager.cpp

/*
 * Copyright (C) 2010, 2013 Apple Inc. All rights reserved.
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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#include "config.h"
#include "WebDatabaseManager.h"

#include "OriginAndDatabases.h"
#include "WebCoreArgumentCoders.h"
#include "WebDatabaseManagerMessages.h"
#include "WebDatabaseManagerProxyMessages.h"
#include "WebProcess.h"
#include "WebProcessCreationParameters.h"
#include <WebCore/DatabaseDetails.h>
#include <WebCore/DatabaseManager.h>
#include <WebCore/SecurityOrigin.h>

using namespace WebCore;

namespace WebKit {

const char* WebDatabaseManager::supplementName()
{
    return "WebDatabaseManager";
}

WebDatabaseManager::WebDatabaseManager(WebProcess* process)
    : m_process(process)
{
    m_process->addMessageReceiver(Messages::WebDatabaseManager::messageReceiverName(), *this);
}

void WebDatabaseManager::initialize(const WebProcessCreationParameters& parameters)
{
    auto& databaseManager = DatabaseManager::singleton();
    databaseManager.initialize(parameters.webSQLDatabaseDirectory);
    databaseManager.setClient(this);
}

void WebDatabaseManager::getDatabasesByOrigin(uint64_t callbackID) const
{
    // FIXME: This could be made more efficient by adding a function to DatabaseManager
    // to get both the origins and the Vector of DatabaseDetails for each origin in one
    // shot.  That would avoid taking the numerous locks this requires.

    auto& databaseManager = DatabaseManager::singleton();
    Vector<RefPtr<SecurityOrigin>> origins;
    databaseManager.origins(origins);

    Vector<OriginAndDatabases> originAndDatabasesVector;
    originAndDatabasesVector.reserveInitialCapacity(origins.size());

    for (size_t i = 0; i < origins.size(); ++i) {
        OriginAndDatabases originAndDatabases;

        Vector<String> nameVector;
        if (!databaseManager.databaseNamesForOrigin(origins[i].get(), nameVector))
            continue;

        Vector<DatabaseDetails> detailsVector;
        detailsVector.reserveInitialCapacity(nameVector.size());
        for (size_t j = 0; j < nameVector.size(); j++) {
            DatabaseDetails details = databaseManager.detailsForNameAndOrigin(nameVector[j], origins[i].get());
            if (details.name().isNull())
                continue;

            detailsVector.append(details);
        }

        if (detailsVector.isEmpty())
            continue;

        originAndDatabases.originIdentifier = origins[i]->databaseIdentifier();
        originAndDatabases.originQuota = databaseManager.quotaForOrigin(origins[i].get());
        originAndDatabases.originUsage = databaseManager.usageForOrigin(origins[i].get());
        originAndDatabases.databases.swap(detailsVector); 
        originAndDatabasesVector.append(originAndDatabases);
    }

    m_process->send(Messages::WebDatabaseManagerProxy::DidGetDatabasesByOrigin(originAndDatabasesVector, callbackID), 0);
}

void WebDatabaseManager::getDatabaseOrigins(uint64_t callbackID) const
{
    Vector<RefPtr<SecurityOrigin>> origins;
    DatabaseManager::singleton().origins(origins);

    size_t numOrigins = origins.size();

    Vector<String> identifiers(numOrigins);
    for (size_t i = 0; i < numOrigins; ++i)
        identifiers[i] = origins[i]->databaseIdentifier();
    m_process->send(Messages::WebDatabaseManagerProxy::DidGetDatabaseOrigins(identifiers, callbackID), 0);
}

void WebDatabaseManager::deleteDatabaseWithNameForOrigin(const String& databaseIdentifier, const String& originIdentifier) const
{
    RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromDatabaseIdentifier(originIdentifier);
    if (!origin)
        return;

    DatabaseManager::singleton().deleteDatabase(origin.get(), databaseIdentifier);
}

void WebDatabaseManager::deleteDatabasesForOrigin(const String& originIdentifier) const
{
    RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromDatabaseIdentifier(originIdentifier);
    if (!origin)
        return;

    DatabaseManager::singleton().deleteOrigin(origin.get());
}

void WebDatabaseManager::deleteAllDatabases() const
{
    DatabaseManager::singleton().deleteAllDatabases();
}

void WebDatabaseManager::setQuotaForOrigin(const String& originIdentifier, unsigned long long quota) const
{
    // If the quota is set to a value lower than the current usage, that quota will
    // "stick" but no data will be purged to meet the new quota. This will simply
    // prevent new data from being added to databases in that origin.

    RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromDatabaseIdentifier(originIdentifier);
    if (!origin)
        return;

    DatabaseManager::singleton().setQuota(origin.get(), quota);
}

void WebDatabaseManager::dispatchDidModifyOrigin(SecurityOrigin* origin)
{
    // NOTE: This may be called on a non-main thread.
    m_process->send(Messages::WebDatabaseManagerProxy::DidModifyOrigin(origin->databaseIdentifier()), 0);
}

void WebDatabaseManager::dispatchDidModifyDatabase(WebCore::SecurityOrigin* origin, const String& databaseIdentifier)
{
    // NOTE: This may be called on a non-main thread.
    m_process->send(Messages::WebDatabaseManagerProxy::DidModifyDatabase(origin->databaseIdentifier(), databaseIdentifier), 0);
}

} // namespace WebKit