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 } 262
