blob: 26192e0e3f0bd1a8b71b49f529aa6d75d50a9eee [file] [log] [blame]
// Copyright 2016 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/sync_device_info/device_info_util.h"
#include <algorithm>
#include "base/strings/string_util.h"
#include "components/sync/protocol/sync.pb.h"
namespace syncer {
using base::Time;
using base::TimeDelta;
using sync_pb::DeviceInfoSpecifics;
const char DeviceInfoUtil::kClientTagPrefix[] = "DeviceInfo_";
const TimeDelta DeviceInfoUtil::kPulseInterval = TimeDelta::FromDays(1);
const TimeDelta DeviceInfoUtil::kActiveThreshold = TimeDelta::FromDays(14);
namespace {
base::TimeDelta Age(const base::Time last_update, const base::Time now) {
// Don't allow negative age for things somehow updated in the future.
return std::max(base::TimeDelta(), now - last_update);
} // namespace
// static
base::TimeDelta DeviceInfoUtil::CalculatePulseDelay(
const base::Time last_update,
const base::Time now) {
// Don't allow negative delays for very stale data, use delay of 0.
return std::max(base::TimeDelta(), kPulseInterval - Age(last_update, now));
// static
bool DeviceInfoUtil::IsActive(const Time last_update, const Time now) {
return Age(last_update, now) < kActiveThreshold;
// static
std::string DeviceInfoUtil::SpecificsToTag(
const sync_pb::DeviceInfoSpecifics& specifics) {
return kClientTagPrefix + specifics.cache_guid();
// static
std::string DeviceInfoUtil::TagToCacheGuid(const std::string& tag) {
DCHECK(base::StartsWith(tag, kClientTagPrefix, base::CompareCase::SENSITIVE));
return tag.substr(strlen(kClientTagPrefix));
} // namespace syncer