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/*
* Copyright (C) 2008-2021 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.
*/
#pragma once
#include "StorageAreaBase.h"
#include <wtf/TZoneMalloc.h>
namespace WebCore {
class SQLiteDatabase;
class SQLiteStatement;
class SQLiteStatementAutoResetScope;
class SQLiteTransaction;
}
namespace WebKit {
class SQLiteStorageArea final : public StorageAreaBase, public RefCounted<SQLiteStorageArea> {
WTF_MAKE_TZONE_ALLOCATED(SQLiteStorageArea);
public:
static Ref<SQLiteStorageArea> create(unsigned quota, const WebCore::ClientOrigin&, const String& path, Ref<WorkQueue>&&);
~SQLiteStorageArea();
void close();
void handleLowMemoryWarning();
void commitTransactionIfNecessary();
void clear() final;
void ref() const final { RefCounted::ref(); }
void deref() const final { RefCounted::deref(); }
private:
SQLiteStorageArea(unsigned quota, const WebCore::ClientOrigin&, const String& path, Ref<WorkQueue>&&);
// StorageAreaBase
Type type() const final { return StorageAreaBase::Type::SQLite; };
StorageType storageType() const final { return StorageAreaBase::StorageType::Local; };
bool isEmpty() final;
HashMap<String, String> allItems() final;
Expected<void, StorageError> setItem(std::optional<IPC::Connection::UniqueID>, std::optional<StorageAreaImplIdentifier>, String&& key, String&& value, const String& urlString) final;
Expected<void, StorageError> removeItem(IPC::Connection::UniqueID, StorageAreaImplIdentifier, const String& key, const String& urlString) final;
Expected<void, StorageError> clear(IPC::Connection::UniqueID, StorageAreaImplIdentifier, const String& urlString) final;
bool createTableIfNecessary();
enum class ShouldCreateIfNotExists : bool { No, Yes };
bool prepareDatabase(ShouldCreateIfNotExists);
void startTransactionIfNecessary();
enum class StatementType : uint8_t {
CountItems,
DeleteItem,
DeleteAllItems,
GetItem,
GetAllItems,
SetItem,
Invalid
};
ASCIILiteral statementString(StatementType) const;
WebCore::SQLiteStatementAutoResetScope cachedStatement(StatementType);
Expected<String, StorageError> getItem(const String& key);
Expected<String, StorageError> getItemFromDatabase(const String& key);
enum class IsDatabaseDeleted : bool { No, Yes };
IsDatabaseDeleted handleDatabaseErrorIfNeeded(int databaseError);
void updateCacheIfNeeded(const String& key, const String& value);
bool requestSpace(const String& key, const String& value);
String m_path;
const Ref<WorkQueue> m_queue;
std::unique_ptr<WebCore::SQLiteDatabase> m_database;
std::unique_ptr<WebCore::SQLiteTransaction> m_transaction;
Vector<std::unique_ptr<WebCore::SQLiteStatement>> m_cachedStatements;
using Value = std::variant<String, unsigned>;
std::optional<HashMap<String, Value>> m_cache;
std::optional<unsigned> m_cacheSize;
};
} // namespace WebKit
SPECIALIZE_TYPE_TRAITS_BEGIN(WebKit::SQLiteStorageArea)
static bool isType(const WebKit::StorageAreaBase& area) { return area.type() == WebKit::StorageAreaBase::Type::SQLite; }
SPECIALIZE_TYPE_TRAITS_END()
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