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// Copyright (c) 2010 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.
// This file defines a set of user experience metrics data recorded by
// the MetricsService. This is the unit of data that is sent to the server.
#ifndef CHROME_BROWSER_METRICS_METRICS_LOG_H_
#define CHROME_BROWSER_METRICS_METRICS_LOG_H_
#pragma once
#include "base/basictypes.h"
#include "chrome/common/metrics_helpers.h"
#include "chrome/common/page_transition_types.h"
#include "webkit/glue/plugins/webplugininfo.h"
struct AutocompleteLog;
class DictionaryValue;
class GURL;
class PrefService;
class MetricsLog : public MetricsLogBase {
public:
// Creates a new metrics log
// client_id is the identifier for this profile on this installation
// session_id is an integer that's incremented on each application launch
MetricsLog(const std::string& client_id, int session_id);
virtual ~MetricsLog();
static void RegisterPrefs(PrefService* prefs);
// Records the current operating environment. Takes the list of installed
// plugins as a parameter because that can't be obtained synchronously
// from the UI thread.
// profile_metrics, if non-null, gives a dictionary of all profile metrics
// that are to be recorded. Each value in profile_metrics should be a
// dictionary giving the metrics for the profile.
void RecordEnvironment(const std::vector<WebPluginInfo>& plugin_list,
const DictionaryValue* profile_metrics);
// Records the input text, available choices, and selected entry when the
// user uses the Omnibox to open a URL.
void RecordOmniboxOpenedURL(const AutocompleteLog& log);
// Record recent delta for critical stability metrics. We can't wait for a
// restart to gather these, as that delay biases our observation away from
// users that run happily for a looooong time. We send increments with each
// uma log upload, just as we send histogram data.
void RecordIncrementalStabilityElements();
// Get the amount of uptime in seconds since this function was last called.
// This updates the cumulative uptime metric for uninstall as a side effect.
static int64 GetIncrementalUptime(PrefService* pref);
// Get the current version of the application as a string.
static std::string GetVersionString();
virtual MetricsLog* AsMetricsLog();
private:
// Returns the date at which the current metrics client ID was created as
// a string containing milliseconds since the epoch, or "0" if none was found.
std::string GetInstallDate() const;
// Writes application stability metrics (as part of the profile log).
// NOTE: Has the side-effect of clearing those counts.
void WriteStabilityElement();
// Within stability group, write plugin crash stats.
void WritePluginStabilityElements(PrefService* pref);
// Within the stability group, write required attributes.
void WriteRequiredStabilityAttributes(PrefService* pref);
// Within the stability group, write attributes that need to be updated asap
// and can't be delayed until the user decides to restart chromium.
// Delaying these stats would bias metrics away from happy long lived
// chromium processes (ones that don't crash, and keep on running).
void WriteRealtimeStabilityAttributes(PrefService* pref);
// Writes the list of installed plugins.
void WritePluginList(const std::vector<WebPluginInfo>& plugin_list);
// Within the profile group, write basic install info including appversion.
void WriteInstallElement();
// Writes all profile metrics. This invokes WriteProfileMetrics for each key
// in all_profiles_metrics that starts with kProfilePrefix.
void WriteAllProfilesMetrics(const DictionaryValue& all_profiles_metrics);
// Writes metrics for the profile identified by key. This writes all
// key/value pairs in profile_metrics.
void WriteProfileMetrics(const std::string& key,
const DictionaryValue& profile_metrics);
DISALLOW_COPY_AND_ASSIGN(MetricsLog);
};
#endif // CHROME_BROWSER_METRICS_METRICS_LOG_H_
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