//

// SKBatteryStatus.m

// SensingKit

//

// Copyright (c) 2014. Kleomenis Katevas

// Kleomenis Katevas, minos.kat@gmail.com

//

// This file is part of SensingKit-iOS library.

// For more information, please visit https://www.sensingkit.org

//

// SensingKit-iOS is free software: you can redistribute it and/or modify

// it under the terms of the GNU Lesser General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// SensingKit-iOS is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

// GNU Lesser General Public License for more details.

//

// You should have received a copy of the GNU Lesser General Public License

// along with SensingKit-iOS. If not, see <http://www.gnu.org/licenses/>.

//

#import "SKBatteryStatus.h"

#import "SKBatteryStatusData.h"

@implementation SKBatteryStatus

- (instancetype)initWithConfiguration:(SKBatteryStatusConfiguration *)configuration

{

if (self = [super init])

{

// Register for battery level and state change notifications

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(batterySensorStateChanged:)

name:UIDeviceBatteryLevelDidChangeNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(batterySensorStateChanged:)

name:UIDeviceBatteryStateDidChangeNotification object:nil];

// powerModeChanged: will be registered later (on startSensing:)

self.configuration = configuration;

}

return self;

}

#pragma mark Configuration

- (void)setConfiguration:(SKConfiguration *)configuration

{

super.configuration = configuration;

// Cast the configuration instance

// SKBatteryConfiguration *batteryConfiguration = (SKBatteryConfiguration *)configuration;

// Make the required updates on the sensor

//

}

#pragma mark Sensing

+ (BOOL)isSensorAvailable

{

// Always available

return YES;

}

- (BOOL)startSensing:(NSError **)error

{

if (![super startSensing:error]) {

return NO;

}

if (![SKBatteryStatus isSensorAvailable])

{

if (error) {

NSDictionary *userInfo = @{

NSLocalizedDescriptionKey: NSLocalizedString(@"Battery Status sensor is not available.", nil),

};

*error = [NSError errorWithDomain:SKErrorDomain

code:SKSensorNotAvailableError

userInfo:userInfo];

}

return NO;

}

// start receiving battery level and state change notifications

[UIDevice currentDevice].batteryMonitoringEnabled = YES;

// start receiving powerModeChanged related notifications

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(batterySensorStateChanged:)

name:NSProcessInfoPowerStateDidChangeNotification

object:nil];

return YES;

}

- (BOOL)stopSensing:(NSError **)error

{

// stop receiving battery level and state change notifications

[UIDevice currentDevice].batteryMonitoringEnabled = NO;

// stop receiving powerModeChanged related notifications

[[NSNotificationCenter defaultCenter] removeObserver:self

name:NSProcessInfoPowerStateDidChangeNotification

object:nil];

return [super stopSensing:error];

}

- (CGFloat)batteryLevel

{

return [UIDevice currentDevice].batteryLevel;

}

- (UIDeviceBatteryState)batteryState

{

return [UIDevice currentDevice].batteryState;

}

- (SKLowPowerModeState)lowPowerModeState

{

if ([[NSProcessInfo processInfo] isLowPowerModeEnabled])

{

return SKLowPowerModeStateEnabled;

}

else

{

return SKLowPowerModeStateDisabled;

}

}

- (void)batterySensorStateChanged:(NSNotification *)notification

{

SKBatteryStatusData *data = [[SKBatteryStatusData alloc] initWithLevel:[self batteryLevel]

state:[self batteryState]

lowPowerModeState:[self lowPowerModeState]];

[self submitSensorData:data error:NULL];

}

@end