chrome/browser/metrics/signin_status_metrics_provider.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_METRICS_SIGNIN_STATUS_METRICS_PROVIDER_H_
   6 #define CHROME_BROWSER_METRICS_SIGNIN_STATUS_METRICS_PROVIDER_H_
   7
   8 #include <string>
   9
  10 #include "base/gtest_prod_util.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/scoped_observer.h"
  13 #include "chrome/browser/signin/signin_manager_factory.h"
  14 #include "chrome/browser/ui/browser_list_observer.h"
  15 #include "components/metrics/metrics_provider.h"
  16 #include "components/signin/core/browser/signin_manager_base.h"
  17
  18 class Browser;
  19
  20 namespace base {
  21 class FilePath;
  22 }
  23
  24 // Collect login status of all opened profiles during one UMA session and record
  25 // the value into a histogram before UMA log is uploaded. It's currently not
  26 // supported on platform chromeos, Android or iOS.
  27 class SigninStatusMetricsProvider : public metrics::MetricsProvider,
  28                                     public chrome::BrowserListObserver,
  29                                     public SigninManagerBase::Observer,
  30                                     public SigninManagerFactory::Observer {
  31  public:
  32   virtual ~SigninStatusMetricsProvider();
  33
  34   // Record the collected sign-in status into a histogram and re-check current
  35   // sign-in status to get prepared for the next UMA session. Called by
  36   // MetricsServiceClient when it is collecting final metrics.
  37   void RecordSigninStatusHistogram();
  38
  39   // Factory method, creates a new instance of this class.
  40   static SigninStatusMetricsProvider* CreateInstance();
  41
  42  private:
  43   // The boolean |is_test| indicates whether or not this is an instance for
  44   // testing purpose. If so, skip the initialization. Except for testing
  45   // purpose, this class's instance should be created through the static
  46   // CreateInstance() method.
  47   explicit SigninStatusMetricsProvider(bool is_test);
  48
  49   FRIEND_TEST_ALL_PREFIXES(SigninStatusMetricsProvider,
  50                            UpdateInitialSigninStatus);
  51   FRIEND_TEST_ALL_PREFIXES(SigninStatusMetricsProvider,
  52                            UpdateStatusWhenBrowserAdded);
  53   FRIEND_TEST_ALL_PREFIXES(SigninStatusMetricsProvider, GoogleSigninSucceeded);
  54   FRIEND_TEST_ALL_PREFIXES(SigninStatusMetricsProvider, GoogleSignedOut);
  55
  56   // Possible sign-in status of all opened profiles during one UMA session. For
  57   // MIXED_SIGNIN_STATUS, at least one signed-in profile and at least one
  58   // unsigned-in profile were opened between two UMA log uploads.
  59   enum ProfilesSigninStatus {
  60     ALL_PROFILES_SIGNED_IN,
  61     ALL_PROFILES_NOT_SIGNED_IN,
  62     MIXED_SIGNIN_STATUS,
  63     UNKNOWN_SIGNIN_STATUS,
  64     SIGNIN_STATUS_MAX,
  65   };
  66
  67   // chrome::BrowserListObserver:
  68   // This will never be called on Android.
  69   virtual void OnBrowserAdded(Browser* browser) OVERRIDE;
  70
  71   // SigninManagerFactory::Observer:
  72   virtual void SigninManagerCreated(SigninManagerBase* manager) OVERRIDE;
  73   virtual void SigninManagerShutdown(SigninManagerBase* manager) OVERRIDE;
  74
  75   // SigninManagerBase::Observer:
  76   virtual void GoogleSigninSucceeded(const std::string& username,
  77                                      const std::string& password) OVERRIDE;
  78   virtual void GoogleSignedOut(const std::string& username) OVERRIDE;
  79
  80   // Obtain sign-in status and add observers.
  81   void Initialize();
  82
  83   // Update the sign-in status based on all currently opened profiles. Called by
  84   // ComputeCurrentSigninStatus at class construction and right after each UMA
  85   // log upload. |total_count| is the number of opened profiles and
  86   // |signed_in_count| represents the number of signed-in profiles among those
  87   // |total_count| profiles.
  88   void UpdateInitialSigninStatus(size_t total_count, size_t signed_in_count);
  89
  90   // Update the sign-in status right after a new browser is opened.
  91   void UpdateStatusWhenBrowserAdded(bool signed_in);
  92
  93   // Compute current sign-in status of all opened profiles.
  94   void ComputeCurrentSigninStatus();
  95
  96   // Get the current recorded sign-in status. For testing purpose only.
  97   ProfilesSigninStatus GetSigninStatusForTesting();
  98
  99   // Sign-in status of all profiles seen so far.
 100   ProfilesSigninStatus signin_status_;
 101
 102   // Used to track the SigninManagers that this instance is observing so that
 103   // this instance can be removed as an observer on its destruction.
 104   ScopedObserver<SigninManagerBase, SigninStatusMetricsProvider>
 105       scoped_observer_;
 106
 107   // Whether the instance is for testing or not.
 108   bool is_test_;
 109
 110   base::WeakPtrFactory<SigninStatusMetricsProvider> weak_ptr_factory_;
 111
 112   DISALLOW_COPY_AND_ASSIGN(SigninStatusMetricsProvider);
 113 };
 114
 115 #endif  // CHROME_BROWSER_METRICS_SIGNIN_STATUS_METRICS_PROVIDER_H_