src/local_aggregation_1_1/aggregation_procedures/count_aggregation_procedure.cc

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/local_aggregation_1_1/aggregation_procedures/count_aggregation_procedure.h"

#include <tuple>

#include "src/lib/statusor/status_macros.h"
#include "src/lib/util/datetime_util.h"
#include "src/local_aggregation_1_1/aggregation_procedures/aggregation_procedure.h"
#include "src/logger/encoder.h"
#include "src/pb/observation.pb.h"

namespace cobalt::local_aggregation {

void CountAggregationProcedure::UpdateAggregateData(const logger::EventRecord &event_record,
                                                    AggregateData *aggregate_data,
                                                    EventCodeAggregate * /*aggregate*/) {
  uint64_t occurrence_count = event_record.event()->occurrence_event().count();
  aggregate_data->set_count(aggregate_data->count() + occurrence_count);
}

lib::statusor::StatusOr<std::unique_ptr<Observation>>
CountAggregationProcedure::GenerateHourlyObservation(EventCodeAggregate *aggregate) {
  std::vector<std::tuple<std::vector<uint32_t>, int64_t>> data;
  data.reserve(aggregate->by_event_code_size());

  for (const EventCodesAggregateData &aggregate_data : aggregate->by_event_code()) {
    std::vector<uint32_t> event_codes(aggregate_data.event_codes().begin(),
                                      aggregate_data.event_codes().end());
    data.emplace_back(std::make_tuple(event_codes, aggregate_data.data().count()));
  }

  if (data.empty()) {
    return {nullptr};
  }

  return logger::Encoder::EncodeIntegerObservation(data);
}

std::string CountAggregationProcedure::DebugString() const { return "COUNT"; }

}  // namespace cobalt::local_aggregation