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// Copyright 2017 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/ukm/observers/sync_disable_observer.h"
#include "base/feature_list.h"
#include "base/metrics/histogram_macros.h"
#include "base/stl_util.h"
#include "components/sync/driver/sync_token_status.h"
#include "components/sync/engine/connection_status.h"
namespace ukm {
const base::Feature kUkmCheckAuthErrorFeature{"UkmCheckAuthError",
base::FEATURE_ENABLED_BY_DEFAULT};
namespace {
enum DisableInfo {
DISABLED_BY_NONE,
DISABLED_BY_HISTORY,
DISABLED_BY_INITIALIZED,
DISABLED_BY_HISTORY_INITIALIZED,
DISABLED_BY_CONNECTED,
DISABLED_BY_HISTORY_CONNECTED,
DISABLED_BY_INITIALIZED_CONNECTED,
DISABLED_BY_HISTORY_INITIALIZED_CONNECTED,
DISABLED_BY_PASSPHRASE,
DISABLED_BY_HISTORY_PASSPHRASE,
DISABLED_BY_INITIALIZED_PASSPHRASE,
DISABLED_BY_HISTORY_INITIALIZED_PASSPHRASE,
DISABLED_BY_CONNECTED_PASSPHRASE,
DISABLED_BY_HISTORY_CONNECTED_PASSPHRASE,
DISABLED_BY_INITIALIZED_CONNECTED_PASSPHRASE,
DISABLED_BY_HISTORY_INITIALIZED_CONNECTED_PASSPHRASE,
MAX_DISABLE_INFO
};
void RecordDisableInfo(DisableInfo info) {
UMA_HISTOGRAM_ENUMERATION("UKM.SyncDisable.Info", info, MAX_DISABLE_INFO);
}
} // namespace
SyncDisableObserver::SyncDisableObserver()
: sync_observer_(this),
all_histories_enabled_(false),
all_extensions_enabled_(false) {}
SyncDisableObserver::~SyncDisableObserver() {}
// static
SyncDisableObserver::SyncState SyncDisableObserver::GetSyncState(
syncer::SyncService* sync_service) {
syncer::SyncTokenStatus status = sync_service->GetSyncTokenStatus();
SyncState state;
state.history_enabled = sync_service->GetPreferredDataTypes().Has(
syncer::HISTORY_DELETE_DIRECTIVES);
state.extensions_enabled =
sync_service->GetPreferredDataTypes().Has(syncer::EXTENSIONS);
state.initialized = sync_service->IsEngineInitialized();
state.connected = !base::FeatureList::IsEnabled(kUkmCheckAuthErrorFeature) ||
status.connection_status == syncer::CONNECTION_OK;
state.passphrase_protected =
state.initialized && sync_service->IsUsingSecondaryPassphrase();
return state;
}
void SyncDisableObserver::ObserveServiceForSyncDisables(
syncer::SyncService* sync_service) {
previous_states_[sync_service] = GetSyncState(sync_service);
sync_observer_.Add(sync_service);
UpdateAllProfileEnabled(false);
}
void SyncDisableObserver::UpdateAllProfileEnabled(bool must_purge) {
bool all_enabled = CheckSyncStateOnAllProfiles();
bool all_extensions_enabled =
all_enabled && CheckSyncStateForExtensionsOnAllProfiles();
// Any change in sync settings needs to call OnSyncPrefsChanged so that the
// new settings take effect.
if (must_purge || (all_enabled != all_histories_enabled_) ||
(all_extensions_enabled != all_extensions_enabled_)) {
all_histories_enabled_ = all_enabled;
all_extensions_enabled_ = all_extensions_enabled;
OnSyncPrefsChanged(must_purge);
}
}
bool SyncDisableObserver::CheckSyncStateOnAllProfiles() {
if (previous_states_.empty())
return false;
for (const auto& kv : previous_states_) {
const SyncDisableObserver::SyncState& state = kv.second;
if (!state.history_enabled || !state.initialized || !state.connected ||
state.passphrase_protected) {
int disabled_by = 0;
if (!state.history_enabled)
disabled_by |= 1 << 0;
if (!state.initialized)
disabled_by |= 1 << 1;
if (!state.connected)
disabled_by |= 1 << 2;
if (state.passphrase_protected)
disabled_by |= 1 << 3;
RecordDisableInfo(DisableInfo(disabled_by));
return false;
}
}
RecordDisableInfo(DISABLED_BY_NONE);
return true;
}
bool SyncDisableObserver::CheckSyncStateForExtensionsOnAllProfiles() {
if (previous_states_.empty())
return false;
for (const auto& kv : previous_states_) {
const SyncDisableObserver::SyncState& state = kv.second;
if (!state.extensions_enabled)
return false;
}
return true;
}
void SyncDisableObserver::OnStateChanged(syncer::SyncService* sync) {
DCHECK(base::ContainsKey(previous_states_, sync));
SyncDisableObserver::SyncState state = GetSyncState(sync);
const SyncDisableObserver::SyncState& previous_state = previous_states_[sync];
bool must_purge =
// Trigger a purge if history sync was disabled.
(previous_state.history_enabled && !state.history_enabled) ||
// Trigger a purge if engine has become disabled.
(previous_state.initialized && !state.initialized) ||
// Trigger a purge if the user added a passphrase. Since we can't detect
// the use of a passphrase while the engine is not initialized, we may
// miss the transition if the user adds a passphrase in this state.
(previous_state.initialized && state.initialized &&
!previous_state.passphrase_protected && state.passphrase_protected);
previous_states_[sync] = state;
UpdateAllProfileEnabled(must_purge);
}
void SyncDisableObserver::OnSyncShutdown(syncer::SyncService* sync) {
DCHECK(base::ContainsKey(previous_states_, sync));
sync_observer_.Remove(sync);
previous_states_.erase(sync);
UpdateAllProfileEnabled(false);
}
bool SyncDisableObserver::SyncStateAllowsUkm() {
return all_histories_enabled_;
}
bool SyncDisableObserver::SyncStateAllowsExtensionUkm() {
return all_extensions_enabled_;
}
} // namespace ukm
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