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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/variations/service/google_groups_manager.h"
#include <iterator>
#include <string>
#include <string_view>
#include <vector>
#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/metrics/field_trial_params.h"
#include "base/strings/string_split.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "components/sync/service/sync_service.h"
#include "components/variations/pref_names.h"
#include "components/variations/service/google_groups_manager_prefs.h"
#include "components/variations/variations_seed_processor.h"
namespace {
std::string GetGoogleGroupsParam(const base::Feature& feature) {
// The `FeatureParam` is created on the fly because `feature` is only known
// at runtime.
return base::FeatureParam<std::string>(
&feature, variations::internal::kGoogleGroupFeatureParamName, "")
.Get();
}
} // namespace
GoogleGroupsManager::GoogleGroupsManager(
PrefService& target_prefs,
const std::string& key,
PrefService& source_prefs)
: target_prefs_(target_prefs), key_(key), source_prefs_(source_prefs) {
// Register for preference changes.
pref_change_registrar_.Init(&source_prefs_.get());
pref_change_registrar_.Add(
#if BUILDFLAG(IS_CHROMEOS)
variations::kOsDogfoodGroupsSyncPrefName,
#else
variations::kDogfoodGroupsSyncPrefName,
#endif
base::BindRepeating(&GoogleGroupsManager::UpdateGoogleGroups,
base::Unretained(this)));
// Also process the initial value.
UpdateGoogleGroups();
}
GoogleGroupsManager::~GoogleGroupsManager() = default;
// static
void GoogleGroupsManager::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
registry->RegisterListPref(
#if BUILDFLAG(IS_CHROMEOS)
variations::kOsDogfoodGroupsSyncPrefName,
user_prefs::PrefRegistrySyncable::SYNCABLE_OS_PRIORITY_PREF
#else
variations::kDogfoodGroupsSyncPrefName,
user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF
#endif
);
}
// static
bool GoogleGroupsManager::IsFeatureGroupControlled(
const base::Feature& feature) {
return !GetGoogleGroupsParam(feature).empty();
}
bool GoogleGroupsManager::IsFeatureEnabledForProfile(
const base::Feature& feature) const {
if (!base::FeatureList::IsEnabled(feature)) {
return false;
}
const std::string google_groups_param = GetGoogleGroupsParam(feature);
const std::vector<std::string_view> group_strings = base::SplitStringPiece(
google_groups_param,
variations::internal::kGoogleGroupFeatureParamSeparator,
base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (group_strings.empty()) {
// No required Google Group for this experiment.
return true;
}
return std::ranges::any_of(group_strings, [&user_groups = google_group_ids_](
std::string_view group) {
return user_groups.contains(group);
});
}
void GoogleGroupsManager::Shutdown() {
sync_service_observation_.Reset();
}
void GoogleGroupsManager::OnSyncServiceInitialized(
syncer::SyncService* sync_service) {
sync_service_observation_.Observe(sync_service);
// Honor the initial state, in case OnStateChanged() never gets called.
OnStateChanged(sync_service);
}
void GoogleGroupsManager::OnStateChanged(syncer::SyncService* sync) {
switch (sync->GetTransportState()) {
case syncer::SyncService::TransportState::DISABLED:
ClearSigninScopedState();
break;
case syncer::SyncService::TransportState::PAUSED:
case syncer::SyncService::TransportState::START_DEFERRED:
case syncer::SyncService::TransportState::INITIALIZING:
case syncer::SyncService::TransportState::PENDING_DESIRED_CONFIGURATION:
case syncer::SyncService::TransportState::CONFIGURING:
case syncer::SyncService::TransportState::ACTIVE:
break;
}
}
void GoogleGroupsManager::OnSyncShutdown(syncer::SyncService* sync) {
sync_service_observation_.Reset();
}
void GoogleGroupsManager::ClearSigninScopedState() {
source_prefs_->ClearPref(
#if BUILDFLAG(IS_CHROMEOS)
variations::kOsDogfoodGroupsSyncPrefName
#else
variations::kDogfoodGroupsSyncPrefName
#endif
);
// UpdateGoogleGroups() will be called via the PrefChangeRegistrar, and will
// propagate this change to local state.
}
void GoogleGroupsManager::UpdateGoogleGroups() {
// Get the current value of the local state dict.
ScopedDictPrefUpdate target_prefs_update(
&target_prefs_.get(), variations::prefs::kVariationsGoogleGroups);
base::Value::Dict& target_prefs_dict = target_prefs_update.Get();
const base::Value::List& source_list = source_prefs_->GetList(
#if BUILDFLAG(IS_CHROMEOS)
variations::kOsDogfoodGroupsSyncPrefName
#else
variations::kDogfoodGroupsSyncPrefName
#endif
);
base::Value::List groups;
std::vector<std::string> group_ids;
group_ids.reserve(source_list.size());
for (const auto& group_value : source_list) {
const base::Value::Dict* group_dict = group_value.GetIfDict();
if (group_dict == nullptr) {
continue;
}
const std::string* group_str =
group_dict->FindString(variations::kDogfoodGroupsSyncPrefGaiaIdKey);
if ((group_str == nullptr) || group_str->empty()) {
continue;
}
groups.Append(*group_str);
group_ids.push_back(*group_str);
}
target_prefs_dict.Set(key_, std::move(groups));
google_group_ids_ = {std::make_move_iterator(group_ids.begin()),
std::make_move_iterator(group_ids.end())};
}
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