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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/390223051): Remove C-library calls to fix the errors.
#pragma allow_unsafe_libc_calls
#endif
#include "components/sync_device_info/device_info_util.h"
#include <algorithm>
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "components/sync/protocol/device_info_specifics.pb.h"
namespace syncer {
const char DeviceInfoUtil::kClientTagPrefix[] = "DeviceInfo_";
const base::TimeDelta DeviceInfoUtil::kActiveThreshold = base::Days(14);
namespace {
// The delay between periodic updates to the entry corresponding to this device.
const base::TimeDelta kPulseInterval = base::Days(1);
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::GetPulseInterval() {
return kPulseInterval;
}
// 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(),
GetPulseInterval() - Age(last_update, now));
}
// static
bool DeviceInfoUtil::IsActive(const base::Time last_update,
const base::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
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