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/* -*- Mode: c++; c-basic-offset: 2; tab-width: 20; indent-tabs-mode: nil; -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_widget_Telemetry_h__
#define mozilla_widget_Telemetry_h__

#include "mozilla/java/TelemetryUtilsNatives.h"
#include "nsAppShell.h"
#include "nsIAndroidBridge.h"

#include "mozilla/Telemetry.h"

namespace mozilla {
namespace widget {

class Telemetry final : public java::TelemetryUtils::Natives<Telemetry> {
  Telemetry() = delete;

  static already_AddRefed<nsIUITelemetryObserver> GetObserver() {
    nsAppShell* const appShell = nsAppShell::Get();
    if (!appShell) {
      return nullptr;
    }

    nsCOMPtr<nsIAndroidBrowserApp> browserApp = appShell->GetBrowserApp();
    nsCOMPtr<nsIUITelemetryObserver> obs;

    if (!browserApp ||
        NS_FAILED(browserApp->GetUITelemetryObserver(getter_AddRefs(obs))) ||
        !obs) {
      return nullptr;
    }

    return obs.forget();
  }

 public:
  static void AddHistogram(jni::String::Param aName, int32_t aValue) {
    MOZ_ASSERT(aName);
    mozilla::Telemetry::Accumulate(aName->ToCString().get(), aValue);
  }

  static void AddKeyedHistogram(jni::String::Param aName,
                                jni::String::Param aKey, int32_t aValue) {
    MOZ_ASSERT(aName && aKey);
    mozilla::Telemetry::Accumulate(aName->ToCString().get(), aKey->ToCString(),
                                   aValue);
  }

  static void StartUISession(jni::String::Param aName, int64_t aTimestamp) {
    MOZ_ASSERT(aName);
    nsCOMPtr<nsIUITelemetryObserver> obs = GetObserver();
    if (obs) {
      obs->StartSession(aName->ToString().get(), aTimestamp);
    }
  }

  static void StopUISession(jni::String::Param aName,
                            jni::String::Param aReason, int64_t aTimestamp) {
    MOZ_ASSERT(aName);
    nsCOMPtr<nsIUITelemetryObserver> obs = GetObserver();
    if (obs) {
      obs->StopSession(aName->ToString().get(),
                       aReason ? aReason->ToString().get() : nullptr,
                       aTimestamp);
    }
  }

  static void AddUIEvent(jni::String::Param aAction, jni::String::Param aMethod,
                         int64_t aTimestamp, jni::String::Param aExtras) {
    MOZ_ASSERT(aAction);
    nsCOMPtr<nsIUITelemetryObserver> obs = GetObserver();
    if (obs) {
      obs->AddEvent(aAction->ToString().get(),
                    aMethod ? aMethod->ToString().get() : nullptr, aTimestamp,
                    aExtras ? aExtras->ToString().get() : nullptr);
    }
  }
};

}  // namespace widget
}  // namespace mozilla

#endif  // mozilla_widget_Telemetry_h__