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// Copyright 2017 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_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_STORAGE_VALIDATOR_H_
#define COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_STORAGE_VALIDATOR_H_
#include <string>
#include "base/macros.h"
namespace feature_engagement_tracker {
// A StorageValidator checks the required storage conditions for a given event,
// and checks if all conditions are met for storing it.
class StorageValidator {
public:
virtual ~StorageValidator() = default;
// Returns true iff new events of this type should be stored.
// This is typically called before storing each incoming event.
virtual bool ShouldStore(const std::string& event_name) const = 0;
// Returns true iff events of this type should be kept for the given day.
// This is typically called during load of the internal database state, to
// possibly throw away old data.
virtual bool ShouldKeep(const std::string& event_name,
uint32_t event_day,
uint32_t current_day) const = 0;
protected:
StorageValidator() = default;
private:
DISALLOW_COPY_AND_ASSIGN(StorageValidator);
};
} // namespace feature_engagement_tracker
#endif // COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_STORAGE_VALIDATOR_H_
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