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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/tether/device_status_util.h"
#include <algorithm>
namespace ash {
namespace tether {
void NormalizeDeviceStatus(const DeviceStatus& status,
std::string* carrier_out,
int32_t* battery_percentage_out,
int32_t* signal_strength_out) {
// Use a sentinel value if carrier information is not available. This value is
// special-cased and replaced with a localized string in the settings UI.
if (carrier_out) {
constexpr char kDefaultCellCarrierName[] = "unknown-carrier";
*carrier_out =
(!status.has_cell_provider() || status.cell_provider().empty())
? kDefaultCellCarrierName
: status.cell_provider();
}
// If battery or signal strength are missing, assume they are 100. For
// battery percentage, force the value to be between 0 and 100. For signal
// strength, convert from Android signal strength to Chrome OS signal
// strength and force the value to be between 0 and 100.
if (battery_percentage_out) {
*battery_percentage_out =
status.has_battery_percentage()
? std::clamp(status.battery_percentage(), 0, 100)
: 100;
}
if (signal_strength_out) {
// Android signal strength is measured between 0 and 4 (inclusive), but
// Chrome OS signal strength is measured between 0 and 100 (inclusive). In
// order to convert between Android signal strength to Chrome OS signal
// strength, the value must be multiplied by the below value.
constexpr int32_t kConversionFactor = 100 / 4;
*signal_strength_out =
status.has_connection_strength()
? std::clamp(kConversionFactor * status.connection_strength(), 0,
100)
: 100;
}
}
} // namespace tether
} // namespace ash
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