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// Copyright 2014 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_METRICS_METRICS_SERVICE_CLIENT_H_
#define COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
#include <stdint.h>
#include <string>
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "components/metrics/proto/system_profile.pb.h"
namespace metrics {
class MetricsLogUploader;
// An abstraction of operations that depend on the embedder's (e.g. Chrome)
// environment.
class MetricsServiceClient {
public:
virtual ~MetricsServiceClient() {}
// Registers the client id with other services (e.g. crash reporting), called
// when metrics recording gets enabled.
virtual void SetMetricsClientId(const std::string& client_id) = 0;
// Whether there's an "off the record" (aka "Incognito") session active.
virtual bool IsOffTheRecordSessionActive() = 0;
// Returns the product value to use in uploaded reports, which will be used to
// set the ChromeUserMetricsExtension.product field. See comments on that
// field on why it's an int32 rather than an enum.
virtual int32_t GetProduct() = 0;
// Returns the current application locale (e.g. "en-US").
virtual std::string GetApplicationLocale() = 0;
// Retrieves the brand code string associated with the install, returning
// false if no brand code is available.
virtual bool GetBrand(std::string* brand_code) = 0;
// Returns the release channel (e.g. stable, beta, etc) of the application.
virtual SystemProfileProto::Channel GetChannel() = 0;
// Returns the version of the application as a string.
virtual std::string GetVersionString() = 0;
// Called by the metrics service when a log has been uploaded.
virtual void OnLogUploadComplete() = 0;
// Starts gathering metrics, calling |done_callback| when initial metrics
// gathering is complete.
virtual void StartGatheringMetrics(const base::Closure& done_callback) = 0;
// Called prior to a metrics log being closed, allowing the client to collect
// extra histograms that will go in that log. Asynchronous API - the client
// implementation should call |done_callback| when complete.
virtual void CollectFinalMetrics(const base::Closure& done_callback) = 0;
// Creates a MetricsLogUploader with the specified parameters (see comments on
// MetricsLogUploader for details).
virtual scoped_ptr<MetricsLogUploader> CreateUploader(
const std::string& server_url,
const std::string& mime_type,
const base::Callback<void(int)>& on_upload_complete) = 0;
// Returns the name of a key under HKEY_CURRENT_USER that can be used to store
// backups of metrics data. Unused except on Windows.
virtual base::string16 GetRegistryBackupKey();
};
} // namespace metrics
#endif // COMPONENTS_METRICS_METRICS_SERVICE_CLIENT_H_
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