LookupCacheV4.h - mozsearch

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

/* 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 LookupCacheV4_h__

#define LookupCacheV4_h__

#include "LookupCache.h"

namespace mozilla {

namespace safebrowsing {

// Forward declaration.

class TableUpdateV4;

class LookupCacheV4 final : public LookupCache {

 public:

  explicit LookupCacheV4(const nsACString& aTableName,

                         const nsACString& aProvider,

                         nsCOMPtr<nsIFile>& aStoreFile)

      : LookupCache(aTableName, aProvider, aStoreFile) {}

  virtual nsresult Has(const Completion& aCompletion, bool* aHas,

                       uint32_t* aMatchLength, bool* aConfirmed) override;

  nsresult Build(PrefixStringMap& aPrefixMap);

  nsresult GetPrefixes(PrefixStringMap& aPrefixMap);

  nsresult GetFixedLengthPrefixes(FallibleTArray<uint32_t>& aPrefixes);

  nsresult GetFixedLengthPrefixByIndex(uint32_t aIndex,

                                       uint32_t* aOutPrefix) const;

  // ApplyUpdate will merge data stored in aTableUpdate with prefixes in

  // aInputMap.

  nsresult ApplyUpdate(RefPtr<TableUpdateV4> aTableUpdate,

                       PrefixStringMap& aInputMap, PrefixStringMap& aOutputMap);

  nsresult AddFullHashResponseToCache(const FullHashResponseMap& aResponseMap);

  nsresult WriteMetadata(RefPtr<const TableUpdateV4> aTableUpdate);

  nsresult LoadMetadata(nsACString& aState, nsACString& aChecksum);

  virtual nsresult LoadMozEntries() override;

  static constexpr int VER = 4;

  static constexpr uint32_t MAX_METADATA_VALUE_LENGTH = 256;

  static constexpr uint32_t VLPSET_MAGIC = 1;

  static constexpr uint32_t VLPSET_VERSION = 0x36044a35;

 protected:

  virtual nsCString GetPrefixSetSuffix() const override;

  nsCString GetMetadataSuffix() const;

 private:

  ~LookupCacheV4() = default;

  virtual int Ver() const override { return VER; }

  virtual nsresult LoadLegacyFile() override;

  virtual nsresult ClearLegacyFile() override;

  virtual void GetHeader(Header& aHeader) override;

  virtual nsresult SanityCheck(const Header& aHeader) override;

};

}  // namespace safebrowsing

}  // namespace mozilla

#endif