chromium/services/network/shared_dictionary/shared_dictionary_storage.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SERVICES_NETWORK_SHARED_DICTIONARY_SHARED_DICTIONARY_STORAGE_H_
#define SERVICES_NETWORK_SHARED_DICTIONARY_SHARED_DICTIONARY_STORAGE_H_

#include <map>
#include <set>
#include <string>

#include "base/component_export.h"
#include "base/containers/contains.h"
#include "base/functional/callback.h"
#include "base/memory/ref_counted.h"
#include "base/strings/pattern.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "url/gurl.h"
#include "url/scheme_host_port.h"

class GURL;

namespace net {
class HttpResponseHeaders;
class SharedDictionary;
}  // namespace net

namespace network {
namespace mojom {
enum class FetchResponseType : int32_t;
enum class RequestDestination : int32_t;
enum class RequestMode : int32_t;
enum class SharedDictionaryError : int32_t;
}  // namespace mojom

class SharedDictionaryWriter;
class SimpleUrlPatternMatcher;

// Shared Dictionary Storage manages dictionaries for a particular
// net::SharedDictionaryIsolationKey.
class COMPONENT_EXPORT(NETWORK_SERVICE) SharedDictionaryStorage
    : public base::RefCounted<SharedDictionaryStorage> { … };

// Returns a matching dictionary for `url` from `dictionary_info_map`.
// This is a template method because SharedDictionaryStorageInMemory and
// SharedDictionaryStorageOnDisk are using different class for
// DictionaryInfoType.
template <class DictionaryInfoType>
DictionaryInfoType* GetMatchingDictionaryFromDictionaryInfoMap(
    std::map<
        url::SchemeHostPort,
        std::map<std::tuple<std::string, std::set<mojom::RequestDestination>>,
                 DictionaryInfoType>>& dictionary_info_map,
    const GURL& url,
    mojom::RequestDestination destination) { … }

// Returns the matching registered dictionary in `dictionary_info_map`. This is
// used to avoid registering the same dictionary from the disk cache.
// This is a template method because SharedDictionaryStorageInMemory and
// SharedDictionaryStorageOnDisk are using different class for
// DictionaryInfoType.
template <class DictionaryInfoType>
DictionaryInfoType* FindRegisteredInDictionaryInfoMap(
    std::map<
        url::SchemeHostPort,
        std::map<std::tuple<std::string, std::set<mojom::RequestDestination>>,
                 DictionaryInfoType>>& dictionary_info_map,
    const GURL& url,
    base::Time response_time,
    base::TimeDelta expiration,
    const std::string& match,
    const std::set<mojom::RequestDestination>& match_dest,
    const std::string& id) { … }

}  // namespace network

#endif  // SERVICES_NETWORK_SHARED_DICTIONARY_SHARED_DICTIONARY_STORAGE_H_