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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SIGNALS_UKM_CONFIG_H_
#define COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SIGNALS_UKM_CONFIG_H_
#include <cstdint>
#include "base/containers/flat_map.h"
#include "base/containers/flat_set.h"
#include "components/segmentation_platform/internal/database/ukm_types.h"
namespace segmentation_platform {
// Config for observation and storage of UKM.
class UkmConfig {
public:
using EventsToMetricsMap =
base::flat_map<UkmEventHash, base::flat_set<UkmMetricHash>>;
UkmConfig();
~UkmConfig();
UkmConfig(const UkmConfig&) = delete;
UkmConfig& operator=(const UkmConfig&) = delete;
// Merge all the events from the given |config|. Returns whether new UKM
// events were added to the current config as a result of merging.
enum MergeResult {
// A new event hash that was not being observed, was added to the config as
// a result of the merge.
NEW_EVENT_ADDED,
// No new event hash was added. NO_NEW_EVENT is returned even if new metrics
// were added to existing event hashes.
NO_NEW_EVENT
};
MergeResult Merge(const UkmConfig& config);
// Returns a list of observed event hashes, for sending it to UkmRecorderImpl.
base::flat_set<uint64_t> GetRawObservedEvents() const;
// Returns a list of metrics observed for the given |event|. Returns nullptr
// if the event is not observed.
const base::flat_set<UkmMetricHash>* GetObservedMetrics(UkmEventHash event);
// Add the given event and metrics for observation.
void AddEvent(UkmEventHash event_hash,
const base::flat_set<UkmMetricHash>& metrics);
const EventsToMetricsMap& metrics_for_event_for_testing() const {
return metrics_for_event_;
}
bool operator==(const UkmConfig& other) const;
private:
EventsToMetricsMap metrics_for_event_;
};
} // namespace segmentation_platform
#endif // COMPONENTS_SEGMENTATION_PLATFORM_INTERNAL_SIGNALS_UKM_CONFIG_H_
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