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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 FUCHSIA_BASE_LEGACYMETRICS_CLIENT_H_
#define FUCHSIA_BASE_LEGACYMETRICS_CLIENT_H_
#include <fuchsia/legacymetrics/cpp/fidl.h>
#include <memory>
#include <vector>
#include "base/callback.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/timer/timer.h"
#include "fuchsia/base/legacymetrics_user_event_recorder.h"
namespace cr_fuchsia {
// Used to report events & histogram data to the
// fuchsia.legacymetrics.MetricsRecorder service.
// LegacyMetricsClient must be Start()ed on an IO-capable sequence.
// Cannot be used in conjunction with other metrics reporting services.
// Must be constructed, used, and destroyed on the same sequence.
class LegacyMetricsClient {
public:
using ReportAdditionalMetricsCallback = base::RepeatingCallback<void(
std::vector<fuchsia::legacymetrics::Event>*)>;
LegacyMetricsClient();
~LegacyMetricsClient();
explicit LegacyMetricsClient(const LegacyMetricsClient&) = delete;
LegacyMetricsClient& operator=(const LegacyMetricsClient&) = delete;
// Starts buffering data and schedules metric reporting after every
// |report_interval|.
void Start(base::TimeDelta report_interval);
// Sets a |callback| to be invoked just prior to reporting, allowing users to
// report additional custom metrics.
// Must be called before Start().
void SetReportAdditionalMetricsCallback(
ReportAdditionalMetricsCallback callback);
private:
void ScheduleNextReport();
void Report();
void OnMetricsRecorderDisconnected(zx_status_t status);
base::TimeDelta report_interval_;
ReportAdditionalMetricsCallback report_additional_callback_;
std::unique_ptr<LegacyMetricsUserActionRecorder> user_events_recorder_;
fuchsia::legacymetrics::MetricsRecorderPtr metrics_recorder_;
base::RetainingOneShotTimer timer_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace cr_fuchsia
#endif // FUCHSIA_BASE_LEGACYMETRICS_CLIENT_H_
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