src/chrome/browser/bookmarks/enhanced_bookmarks_features.cc

   1 // Copyright 2013 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 #include "chrome/browser/bookmarks/enhanced_bookmarks_features.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "base/prefs/scoped_user_pref_update.h"
  11 #include "base/sha1.h"
  12 #include "base/strings/string_number_conversions.h"
  13 #include "chrome/browser/browser_process.h"
  14 #include "chrome/browser/flags_storage.h"
  15 #include "chrome/browser/profiles/profile.h"
  16 #include "chrome/browser/signin/signin_manager_factory.h"
  17 #include "chrome/common/chrome_switches.h"
  18 #include "chrome/common/pref_names.h"
  19 #include "components/signin/core/browser/signin_manager.h"
  20 #include "components/sync_driver/pref_names.h"
  21 #include "components/variations/variations_associated_data.h"
  22 #include "extensions/common/features/feature.h"
  23 #include "extensions/common/features/feature_provider.h"
  24
  25 namespace {
  26
  27 const char kFieldTrialName[] = "EnhancedBookmarks";
  28
  29 // Get extension id from Finch EnhancedBookmarks group parameters.
  30 std::string GetEnhancedBookmarksExtensionIdFromFinch() {
  31   return variations::GetVariationParamValue(kFieldTrialName, "id");
  32 }
  33
  34 // Returns true if enhanced bookmarks experiment is enabled from Finch.
  35 bool IsEnhancedBookmarksExperimentEnabledFromFinch() {
  36   const std::string ext_id = GetEnhancedBookmarksExtensionIdFromFinch();
  37 #if defined(OS_ANDROID)
  38   return !ext_id.empty();
  39 #else
  40   const extensions::FeatureProvider* feature_provider =
  41       extensions::FeatureProvider::GetPermissionFeatures();
  42   extensions::Feature* feature = feature_provider->GetFeature("metricsPrivate");
  43   return feature && feature->IsIdInWhitelist(ext_id);
  44 #endif
  45 }
  46
  47 };  // namespace
  48
  49 bool GetBookmarksExperimentExtensionID(const PrefService* user_prefs,
  50                                        std::string* extension_id) {
  51   BookmarksExperimentState bookmarks_experiment_state =
  52       static_cast<BookmarksExperimentState>(user_prefs->GetInteger(
  53           sync_driver::prefs::kEnhancedBookmarksExperimentEnabled));
  54   if (bookmarks_experiment_state == BOOKMARKS_EXPERIMENT_ENABLED_FROM_FINCH) {
  55     *extension_id = GetEnhancedBookmarksExtensionIdFromFinch();
  56     return !extension_id->empty();
  57   }
  58   if (bookmarks_experiment_state == BOOKMARKS_EXPERIMENT_ENABLED) {
  59     *extension_id = user_prefs->GetString(
  60         sync_driver::prefs::kEnhancedBookmarksExtensionId);
  61     return !extension_id->empty();
  62   }
  63
  64   return false;
  65 }
  66
  67 void UpdateBookmarksExperimentState(
  68     PrefService* user_prefs,
  69     PrefService* local_state,
  70     bool user_signed_in,
  71     BookmarksExperimentState experiment_enabled_from_sync) {
  72  PrefService* flags_storage = local_state;
  73 #if defined(OS_CHROMEOS)
  74   // Chrome OS is using user prefs for flags storage.
  75   flags_storage = user_prefs;
  76 #endif
  77
  78   BookmarksExperimentState bookmarks_experiment_state_before =
  79       static_cast<BookmarksExperimentState>(user_prefs->GetInteger(
  80           sync_driver::prefs::kEnhancedBookmarksExperimentEnabled));
  81   // If user signed out, clear possible previous state.
  82   if (!user_signed_in) {
  83     bookmarks_experiment_state_before = BOOKMARKS_EXPERIMENT_NONE;
  84     ForceFinchBookmarkExperimentIfNeeded(flags_storage,
  85         BOOKMARKS_EXPERIMENT_NONE);
  86   }
  87
  88   // kEnhancedBookmarksExperiment flag could have values "", "1" and "0".
  89   // "0" - user opted out.
  90   bool opt_out = CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  91                      switches::kEnhancedBookmarksExperiment) == "0";
  92
  93   BookmarksExperimentState bookmarks_experiment_new_state =
  94       BOOKMARKS_EXPERIMENT_NONE;
  95
  96   if (IsEnhancedBookmarksExperimentEnabledFromFinch() && !user_signed_in) {
  97     if (opt_out) {
  98       // Experiment enabled but user opted out.
  99       bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_OPT_OUT_FROM_FINCH;
 100     } else {
 101       // Experiment enabled.
 102       bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED_FROM_FINCH;
 103     }
 104   } else if (experiment_enabled_from_sync == BOOKMARKS_EXPERIMENT_ENABLED) {
 105     // Experiment enabled from Chrome sync.
 106     if (opt_out) {
 107       // Experiment enabled but user opted out.
 108       bookmarks_experiment_new_state =
 109           BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT;
 110     } else {
 111       // Experiment enabled.
 112       bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED;
 113     }
 114   } else if (experiment_enabled_from_sync == BOOKMARKS_EXPERIMENT_NONE) {
 115     // Experiment is not enabled from Chrome sync.
 116     bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_NONE;
 117   } else if (bookmarks_experiment_state_before ==
 118              BOOKMARKS_EXPERIMENT_ENABLED) {
 119     if (opt_out) {
 120       // Experiment enabled but user opted out.
 121       bookmarks_experiment_new_state =
 122           BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT;
 123     } else {
 124       bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED;
 125     }
 126   } else if (bookmarks_experiment_state_before ==
 127              BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT) {
 128     if (opt_out) {
 129       bookmarks_experiment_new_state =
 130           BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT;
 131     } else {
 132       // User opted in again.
 133       bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED;
 134     }
 135   }
 136
 137 #if defined(OS_ANDROID)
 138   bool opt_in = !opt_out
 139       && CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
 140           switches::kEnhancedBookmarksExperiment) == "1";
 141   if (opt_in && bookmarks_experiment_new_state == BOOKMARKS_EXPERIMENT_NONE)
 142     bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED;
 143 #endif
 144
 145   UMA_HISTOGRAM_ENUMERATION("EnhancedBookmarks.SyncExperimentState",
 146                             bookmarks_experiment_new_state,
 147                             BOOKMARKS_EXPERIMENT_ENUM_SIZE);
 148   user_prefs->SetInteger(
 149       sync_driver::prefs::kEnhancedBookmarksExperimentEnabled,
 150       bookmarks_experiment_new_state);
 151   ForceFinchBookmarkExperimentIfNeeded(flags_storage,
 152                                        bookmarks_experiment_new_state);
 153 }
 154
 155 void InitBookmarksExperimentState(Profile* profile) {
 156   SigninManagerBase* signin = SigninManagerFactory::GetForProfile(profile);
 157   bool is_signed_in = signin && signin->IsAuthenticated();
 158   UpdateBookmarksExperimentState(
 159       profile->GetPrefs(),
 160       g_browser_process->local_state(),
 161       is_signed_in,
 162       BOOKMARKS_EXPERIMENT_ENABLED_FROM_SYNC_UNKNOWN);
 163 }
 164
 165 void ForceFinchBookmarkExperimentIfNeeded(
 166     PrefService* flags_storage,
 167     BookmarksExperimentState bookmarks_experiment_state) {
 168   if (!flags_storage)
 169     return;
 170   ListPrefUpdate update(flags_storage, prefs::kEnabledLabsExperiments);
 171   base::ListValue* experiments_list = update.Get();
 172   if (!experiments_list)
 173     return;
 174   size_t index;
 175   if (bookmarks_experiment_state == BOOKMARKS_EXPERIMENT_NONE) {
 176     experiments_list->Remove(
 177         base::StringValue(switches::kManualEnhancedBookmarks), &index);
 178     experiments_list->Remove(
 179         base::StringValue(switches::kManualEnhancedBookmarksOptout), &index);
 180   } else if (bookmarks_experiment_state == BOOKMARKS_EXPERIMENT_ENABLED) {
 181     experiments_list->Remove(
 182         base::StringValue(switches::kManualEnhancedBookmarksOptout), &index);
 183     experiments_list->AppendIfNotPresent(
 184         new base::StringValue(switches::kManualEnhancedBookmarks));
 185   } else if (bookmarks_experiment_state ==
 186                  BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT) {
 187     experiments_list->Remove(
 188         base::StringValue(switches::kManualEnhancedBookmarks), &index);
 189     experiments_list->AppendIfNotPresent(
 190         new base::StringValue(switches::kManualEnhancedBookmarksOptout));
 191   }
 192 }
 193
 194 bool IsEnhancedBookmarksExperimentEnabled(
 195     about_flags::FlagsStorage* flags_storage) {
 196 #if defined(OS_CHROMEOS)
 197   // We are not setting command line flags on Chrome OS to avoid browser restart
 198   // but still have flags in flags_storage. So check flags_storage instead.
 199   const std::set<std::string> flags = flags_storage->GetFlags();
 200   if (flags.find(switches::kManualEnhancedBookmarks) != flags.end())
 201     return true;
 202   if (flags.find(switches::kManualEnhancedBookmarksOptout) != flags.end())
 203     return true;
 204 #else
 205   CommandLine* command_line = CommandLine::ForCurrentProcess();
 206   if (command_line->HasSwitch(switches::kManualEnhancedBookmarks) ||
 207       command_line->HasSwitch(switches::kManualEnhancedBookmarksOptout)) {
 208     return true;
 209   }
 210 #endif
 211
 212   return IsEnhancedBookmarksExperimentEnabledFromFinch();
 213 }
 214
 215 #if defined(OS_ANDROID)
 216 bool IsEnhancedBookmarkImageFetchingEnabled(const PrefService* user_prefs) {
 217   if (IsEnhancedBookmarksEnabled(user_prefs))
 218     return true;
 219
 220   // Salient images are collected from visited bookmarked pages even if the
 221   // enhanced bookmark feature is turned off. This is to have some images
 222   // available so that in the future, when the feature is turned on, the user
 223   // experience is not a big list of flat colors. However as a precautionary
 224   // measure it is possible to disable this collection of images from finch.
 225   std::string disable_fetching = variations::GetVariationParamValue(
 226       kFieldTrialName, "DisableImagesFetching");
 227   return disable_fetching.empty();
 228 }
 229
 230 bool IsEnhancedBookmarksEnabled(const PrefService* user_prefs) {
 231   BookmarksExperimentState bookmarks_experiment_state =
 232       static_cast<BookmarksExperimentState>(user_prefs->GetInteger(
 233           sync_driver::prefs::kEnhancedBookmarksExperimentEnabled));
 234   return bookmarks_experiment_state == BOOKMARKS_EXPERIMENT_ENABLED ||
 235       bookmarks_experiment_state == BOOKMARKS_EXPERIMENT_ENABLED_FROM_FINCH;
 236 }
 237 #endif
 238
 239 bool IsEnableDomDistillerSet() {
 240   if (CommandLine::ForCurrentProcess()->
 241       HasSwitch(switches::kEnableDomDistiller)) {
 242     return true;
 243   }
 244   if (variations::GetVariationParamValue(
 245           kFieldTrialName, "enable-dom-distiller") == "1")
 246     return true;
 247
 248   return false;
 249 }
 250
 251 bool IsEnableSyncArticlesSet() {
 252   if (CommandLine::ForCurrentProcess()->
 253       HasSwitch(switches::kEnableSyncArticles)) {
 254     return true;
 255   }
 256   if (variations::GetVariationParamValue(
 257           kFieldTrialName, "enable-sync-articles") == "1")
 258     return true;
 259
 260   return false;
 261 }