enhanced_bookmarks_features.cc revision a1401311d1ab56c4ed0a474bd38c108f75cb0cd9 
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/prefs/pref_service.h"
9#include "base/prefs/scoped_user_pref_update.h"
10#include "base/sha1.h"
11#include "base/strings/string_number_conversions.h"
12#include "chrome/common/chrome_switches.h"
13#include "chrome/common/pref_names.h"
14#include "components/variations/variations_associated_data.h"
15#include "extensions/common/features/feature.h"
16#include "extensions/common/features/feature_provider.h"
17
18namespace {
19
20const char kFieldTrialName[] = "EnhancedBookmarks";
21
22bool IsBookmarksExtensionHash(const std::string& sha1_hex) {
23    return sha1_hex == "D5736E4B5CF695CB93A2FB57E4FDC6E5AFAB6FE2" ||
24           sha1_hex == "D57DE394F36DC1C3220E7604C575D29C51A6C495";
25}
26
27};  // namespace
28
29bool IsBookmarksExtensionInstalled(
30    const extensions::ExtensionIdSet& extension_ids) {
31  // Compare installed extension ids with ones we expect.
32  for (extensions::ExtensionIdSet::const_iterator iter = extension_ids.begin();
33       iter != extension_ids.end(); ++iter) {
34    const std::string id_hash = base::SHA1HashString(*iter);
35    DCHECK_EQ(id_hash.length(), base::kSHA1Length);
36    std::string hash = base::HexEncode(id_hash.c_str(), id_hash.length());
37
38    if (IsBookmarksExtensionHash(hash))
39      return true;
40  }
41  return false;
42}
43
44void UpdateBookmarksExperiment(
45    PrefService* local_state,
46    BookmarksExperimentState bookmarks_experiment_state) {
47  ListPrefUpdate update(local_state, prefs::kEnabledLabsExperiments);
48  base::ListValue* experiments_list = update.Get();
49  size_t index;
50  if (bookmarks_experiment_state == kNoBookmarksExperiment) {
51    experiments_list->Remove(
52        base::StringValue(switches::kManualEnhancedBookmarks), &index);
53    experiments_list->Remove(
54        base::StringValue(switches::kManualEnhancedBookmarksOptout), &index);
55  } else if (bookmarks_experiment_state == kBookmarksExperimentEnabled) {
56    experiments_list->Remove(
57        base::StringValue(switches::kManualEnhancedBookmarksOptout), &index);
58    experiments_list->AppendIfNotPresent(
59        new base::StringValue(switches::kManualEnhancedBookmarks));
60  } else if (bookmarks_experiment_state ==
61                 kBookmarksExperimentEnabledUserOptOut) {
62    experiments_list->Remove(
63        base::StringValue(switches::kManualEnhancedBookmarks), &index);
64    experiments_list->AppendIfNotPresent(
65        new base::StringValue(switches::kManualEnhancedBookmarksOptout));
66  }
67}
68
69bool IsEnhancedBookmarksExperimentEnabled() {
70  CommandLine* command_line = CommandLine::ForCurrentProcess();
71  if (command_line->HasSwitch(switches::kManualEnhancedBookmarks) ||
72      command_line->HasSwitch(switches::kManualEnhancedBookmarksOptout)) {
73    return true;
74  }
75
76  std::string ext_id = GetEnhancedBookmarksExtensionIdFromFinch();
77  extensions::FeatureProvider* feature_provider =
78      extensions::FeatureProvider::GetPermissionFeatures();
79  extensions::Feature* feature = feature_provider->GetFeature("metricsPrivate");
80  return feature && feature->IsIdInWhitelist(ext_id);
81}
82
83bool IsEnableDomDistillerSet() {
84  if (CommandLine::ForCurrentProcess()->
85      HasSwitch(switches::kEnableDomDistiller)) {
86    return true;
87  }
88  if (chrome_variations::GetVariationParamValue(
89          kFieldTrialName, "enable-dom-distiller") == "1")
90    return true;
91
92  return false;
93}
94
95bool IsEnableSyncArticlesSet() {
96  if (CommandLine::ForCurrentProcess()->
97      HasSwitch(switches::kEnableSyncArticles)) {
98    return true;
99  }
100  if (chrome_variations::GetVariationParamValue(
101          kFieldTrialName, "enable-sync-articles") == "1")
102    return true;
103
104  return false;
105}
106
107std::string GetEnhancedBookmarksExtensionIdFromFinch() {
108  return chrome_variations::GetVariationParamValue(kFieldTrialName, "id");
109}
110