/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_SessionStorageCache_h

#define mozilla_dom_SessionStorageCache_h

#include "nsDataHashtable.h"

namespace mozilla {

namespace dom {

class SessionStorageCache final

{

public:

  NS_INLINE_DECL_REFCOUNTING(SessionStorageCache)

  SessionStorageCache();

  enum DataSetType {

    eDefaultSetType,

    eSessionSetType,

  };

  int64_t GetOriginQuotaUsage(DataSetType aDataSetType);

  uint32_t Length(DataSetType aDataSetType);

  void Key(DataSetType aDataSetType, uint32_t aIndex, nsAString& aResult);

  void GetItem(DataSetType aDataSetType, const nsAString& aKey,

               nsAString& aResult);

  void GetKeys(DataSetType aDataSetType, nsTArray<nsString>& aKeys);

  nsresult SetItem(DataSetType aDataSetType, const nsAString& aKey,

                   const nsAString& aValue, nsString& aOldValue);

  nsresult RemoveItem(DataSetType aDataSetType, const nsAString& aKey,

                      nsString& aOldValue);

  void Clear(DataSetType aDataSetType, bool aByUserInteraction = true);

  already_AddRefed<SessionStorageCache>

  Clone() const;

private:

  ~SessionStorageCache() = default;

  struct DataSet

  {

    DataSet()

      : mOriginQuotaUsage(0)

    {}

    bool ProcessUsageDelta(int64_t aDelta);

    int64_t mOriginQuotaUsage;

    nsDataHashtable<nsStringHashKey, nsString> mKeys;

  };

  DataSet* Set(DataSetType aDataSetType);

  DataSet mDefaultSet;

  DataSet mSessionSet;

  bool mSessionDataSetActive;

};

} // dom namespace

} // mozilla namespace

#endif //mozilla_dom_SessionStorageCache_h