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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_FEDERATED_LEARNING_FLOC_ID_H_
#define COMPONENTS_FEDERATED_LEARNING_FLOC_ID_H_
#include "base/optional.h"
#include <stdint.h>
#include <string>
#include <unordered_set>
namespace federated_learning {
// ID used to represent a cohort of people with similar browsing habits. For
// more context, see the explainer at
// https://github.com/jkarlin/floc/blob/master/README.md
class FlocId {
public:
static FlocId CreateFromHistory(
const std::unordered_set<std::string>& domains);
FlocId();
explicit FlocId(uint64_t id);
FlocId(const FlocId& id);
~FlocId();
FlocId& operator=(const FlocId& id);
FlocId& operator=(FlocId&& id);
bool IsValid() const;
uint64_t ToUint64() const;
std::string ToDebugHeaderValue() const;
private:
std::string ToHeaderValue() const;
base::Optional<uint64_t> id_;
};
} // namespace federated_learning
#endif // COMPONENTS_FEDERATED_LEARNING_FLOC_ID_H_
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