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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.car.settings.units;
import android.car.Car;
import android.car.CarNotConnectedException;
import android.car.VehiclePropertyIds;
import android.car.VehicleUnit;
import android.car.hardware.CarPropertyConfig;
import android.car.hardware.property.AreaIdConfig;
import android.car.hardware.property.CarPropertyManager;
import android.content.Context;
import android.util.ArraySet;
import com.android.car.settings.common.Logger;
import java.util.ArrayList;
import java.util.List;
/** Utility to read and write {@link Unit}-related properties in {@link CarPropertyManager}. */
public class CarUnitsManager {
private static final Logger LOG = new Logger(CarUnitsManager.class);
private static final int AREA_ID = 0;
private Context mContext;
private Car mCar;
private CarPropertyManager mCarPropertyManager;
private OnCarServiceListener mCarServiceListener;
public CarUnitsManager(Context context) {
mContext = context;
mCar = Car.createCar(mContext);
mCarPropertyManager =
(CarPropertyManager) mCar.getCarManager(Car.PROPERTY_SERVICE);
}
/**
* Registers {@link OnCarServiceListener} as a Callback for when connection to {@link Car} has
* been established.
*/
public void registerCarServiceListener(OnCarServiceListener listener) {
mCarServiceListener = listener;
mCarServiceListener.handleServiceConnected(mCarPropertyManager);
}
/**
* Unregisters {@link OnCarServiceListener} as a Callback for when connection to {@link Car} has
* been terminated.
*/
public void unregisterCarServiceListener() {
mCarServiceListener = null;
}
protected void disconnect() {
mCar.disconnect();
if (mCarServiceListener != null) {
mCarServiceListener.handleServiceDisconnected();
}
}
protected boolean isPropertyAvailable(int propertyId) {
Integer intProperty = null;
try {
intProperty = mCarPropertyManager.getIntProperty(propertyId, AREA_ID);
} catch (CarNotConnectedException e) {
LOG.e("Property is unavailable because Car is not connected.");
}
return intProperty != null && intProperty != VehicleUnit.SHOULD_NOT_USE;
}
protected Unit[] getUnitsSupportedByProperty(int propertyId) {
ArraySet<Integer> propertyIdSet = new ArraySet<Integer>();
propertyIdSet.add(propertyId);
List<CarPropertyConfig> configs = mCarPropertyManager.getPropertyList(propertyIdSet);
List<Integer> availableUnitsId = new ArrayList<Integer>();
List<Unit> units = new ArrayList<Unit>();
if (configs == null || configs.size() < 1 || configs.get(0) == null) {
return null;
}
// Checks if the property is read-write property. Checking only one area Id because _UNITS
// properties are global properties.
List<AreaIdConfig<?>> areaIdConfigs = configs.get(0).getAreaIdConfigs();
if (areaIdConfigs.get(0).getAccess()
!= CarPropertyConfig.VEHICLE_PROPERTY_ACCESS_READ_WRITE) {
return null;
}
availableUnitsId = configs.get(0).getConfigArray();
Unit[] result = new Unit[availableUnitsId.size()];
for (int unitId : availableUnitsId) {
if (UnitsMap.MAP.get(unitId) != null) {
Unit unit = UnitsMap.MAP.get(unitId);
units.add(unit);
}
}
for (int i = 0; i < result.length; i++) {
int unitId = availableUnitsId.get(i);
if (UnitsMap.MAP.get(unitId) != null) {
Unit unit = UnitsMap.MAP.get(unitId);
result[i] = unit;
}
}
return result;
}
protected Unit getUnitUsedByProperty(int propertyId) {
try {
int unitId = mCarPropertyManager.getIntProperty(propertyId, AREA_ID);
if (UnitsMap.MAP.get(unitId) != null) {
return UnitsMap.MAP.get(unitId);
} else {
return null;
}
} catch (CarNotConnectedException e) {
LOG.e("CarPropertyManager cannot get property because Car is not connected.");
return null;
}
}
protected void setUnitUsedByProperty(int propertyId, int unitId) {
try {
mCarPropertyManager.setIntProperty(propertyId, AREA_ID, unitId);
} catch (CarNotConnectedException e) {
LOG.e("CarPropertyManager cannot set property because Car is not connected.");
}
}
/**
* Returns a boolean that indicates whether the unit is expressed in distance per volume (true)
* or volume per distance (false) for fuel consumption. Note that only distance over volume
* format is supported when Mile and Gallon (both US and UK) units are used.
*/
protected boolean isDistanceOverVolume() {
try {
return mCarPropertyManager.getBooleanProperty(
VehiclePropertyIds.FUEL_CONSUMPTION_UNITS_DISTANCE_OVER_VOLUME, AREA_ID);
} catch (CarNotConnectedException e) {
return true; // Defaults to True.
}
}
/** Defines callbacks that listen to {@link Car} service-related events. */
public interface OnCarServiceListener {
/**
* Callback to be run when {@link Car} service is connected and {@link
* CarPropertyManager} becomes available.
*/
void handleServiceConnected(CarPropertyManager carPropertyManager);
/** Callback to be run when {@link Car} service is disconnected. */
void handleServiceDisconnected();
}
}
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