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SKAbstractSensor.m
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138 lines (105 loc) · 3.61 KB
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//
// SKAbstractSensor.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 "SKAbstractSensor.h"
#import "SKErrors.h"
@interface SKAbstractSensor()
@property (nonatomic, strong) NSMutableArray *sensorDataListeners;
@end
@implementation SKAbstractSensor
- (BOOL)subscribeHandler:(SKSensorDataHandler)handler error:(NSError **)error
{
// Register the callback
if ([self.sensorDataListeners containsObject:handler]) {
if (error) {
NSDictionary *userInfo = @{
NSLocalizedDescriptionKey: NSLocalizedString(@"SKSensorDataHandler already registered.", nil),
};
*error = [NSError errorWithDomain:SKErrorDomain
code:SKDataHandlerAlreadyRegistered
userInfo:userInfo];
}
return NO;
}
[self.sensorDataListeners addObject:handler];
return YES;
}
- (BOOL)unsubscribeHandler:(SKSensorDataHandler)handler error:(NSError **)error
{
// Unregister the callback
if (![self.sensorDataListeners containsObject:handler]) {
if (error) {
NSDictionary *userInfo = @{
NSLocalizedDescriptionKey: NSLocalizedString(@"SKSensorDataHandler is not registered.", nil),
};
*error = [NSError errorWithDomain:SKErrorDomain
code:SKDataHandlerNotRegistered
userInfo:userInfo];
}
return NO;
}
[self.sensorDataListeners removeObject:handler];
return YES;
}
- (void)unsubscribeAllHandlers
{
[self.sensorDataListeners removeAllObjects];
}
- (BOOL)startSensing:(NSError **)error
{
_sensing = YES;
return YES;
}
- (BOOL)stopSensing:(NSError **)error
{
_sensing = NO;
return YES;
}
- (NSMutableArray *)sensorDataListeners
{
if (!_sensorDataListeners) {
_sensorDataListeners = [[NSMutableArray alloc] init];
}
return _sensorDataListeners;
}
- (BOOL)shouldPostSensorData:(SKSensorData *)data
{
// This method can be overrided if needed.
return YES;
}
- (void)submitSensorData:(SKSensorData *)data error:(NSError *)error
{
if ([self shouldPostSensorData:data]) {
if (self.sensorDataListeners.count) {
// CallBack with data and error as parameters
for (SKSensorDataHandler handler in self.sensorDataListeners) {
handler(self.sensorType, data, error);
}
}
}
}
- (NSUInteger)handlersCount
{
return self.sensorDataListeners.count;
}
@end