| // Copyright 2014 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. |
| |
| #include "components/variations/active_field_trials.h" |
| |
| #include <vector> |
| |
| #include "base/strings/stringprintf.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "components/variations/metrics_util.h" |
| |
| namespace variations { |
| |
| namespace { |
| |
| // Populates |name_group_ids| based on |active_groups|. |
| void GetFieldTrialActiveGroupIdsForActiveGroups( |
| const base::FieldTrial::ActiveGroups& active_groups, |
| std::vector<ActiveGroupId>* name_group_ids) { |
| DCHECK(name_group_ids->empty()); |
| for (base::FieldTrial::ActiveGroups::const_iterator it = |
| active_groups.begin(); it != active_groups.end(); ++it) { |
| name_group_ids->push_back(MakeActiveGroupId(it->trial_name, |
| it->group_name)); |
| } |
| } |
| |
| } // namespace |
| |
| ActiveGroupId MakeActiveGroupId(const std::string& trial_name, |
| const std::string& group_name) { |
| ActiveGroupId id; |
| id.name = metrics::HashName(trial_name); |
| id.group = metrics::HashName(group_name); |
| return id; |
| } |
| |
| void GetFieldTrialActiveGroupIds( |
| std::vector<ActiveGroupId>* name_group_ids) { |
| DCHECK(name_group_ids->empty()); |
| // A note on thread safety: Since GetActiveFieldTrialGroups() is thread |
| // safe, and we operate on a separate list of that data, this function is |
| // technically thread safe as well, with respect to the FieldTrialList data. |
| base::FieldTrial::ActiveGroups active_groups; |
| base::FieldTrialList::GetActiveFieldTrialGroups(&active_groups); |
| GetFieldTrialActiveGroupIdsForActiveGroups(active_groups, |
| name_group_ids); |
| } |
| |
| void GetFieldTrialActiveGroupIdsAsStrings(std::vector<std::string>* output) { |
| DCHECK(output->empty()); |
| std::vector<ActiveGroupId> name_group_ids; |
| GetFieldTrialActiveGroupIds(&name_group_ids); |
| for (size_t i = 0; i < name_group_ids.size(); ++i) { |
| output->push_back(base::StringPrintf( |
| "%x-%x", name_group_ids[i].name, name_group_ids[i].group)); |
| } |
| } |
| |
| namespace testing { |
| |
| void TestGetFieldTrialActiveGroupIds( |
| const base::FieldTrial::ActiveGroups& active_groups, |
| std::vector<ActiveGroupId>* name_group_ids) { |
| GetFieldTrialActiveGroupIdsForActiveGroups(active_groups, |
| name_group_ids); |
| } |
| |
| } // namespace testing |
| |
| } // namespace variations |