Add csvString format in sensor data

Author: minoskt

SensingKit/SKAccelerometerData.h

@@ -31,4 +31,6 @@
 
 - (instancetype)initWithAcceleration:(CMAcceleration)acceleration;
 
+- (NSString *)csvString;
+
 @end

SensingKit/SKAccelerometerData.m

@@ -35,4 +35,13 @@ - (instancetype)initWithAcceleration:(CMAcceleration)acceleration
     return self;
 }
 
+- (NSString *)csvString
+{
+    return [NSString stringWithFormat:@"%f, %f, %f, %f",
+            [self timestampEpoch],
+            _acceleration.x,
+            _acceleration.y,
+            _acceleration.z];
+}
+
 @end

SensingKit/SKActivityData.h

@@ -31,4 +31,6 @@
 
 - (instancetype)initWithActivity:(CMMotionActivity *)activity;
 
+- (NSString *)csvString;
+
 @end

SensingKit/SKActivityData.m

@@ -35,4 +35,35 @@ - (instancetype)initWithActivity:(CMMotionActivity *)activity
     return self;
 }
 
+- (NSString *)confidenceString
+{
+    switch (_activity.confidence) {
+        case CMMotionActivityConfidenceHigh:
+            return @"High";
+            
+        case CMMotionActivityConfidenceMedium:
+            return @"Medium";
+            
+        case CMMotionActivityConfidenceLow:
+            return @"Low";
+            
+        default:
+            NSLog(@"Warning: Unknown confidence: %d", (int)_activity.confidence);
+            return @"Unknown";
+    }
+}
+
+- (NSString *)csvString
+{
+    return [NSString stringWithFormat:@"%f, %f, %d, %d, %d, %d, %d, %@",
+            [self timestampEpoch],
+            _activity.timestamp,
+            _activity.stationary,
+            _activity.walking,
+            _activity.running,
+            _activity.automotive,
+            _activity.unknown,
+            [self confidenceString]];
+}
+
 @end

SensingKit/SKBatteryData.h

@@ -31,4 +31,8 @@
 @property (nonatomic, readonly) CGFloat level;
 @property (nonatomic, readonly) UIDeviceBatteryState state;
 
+- (NSString *)stateString;
+
+- (NSString *)csvString;
+
 @end

SensingKit/SKBatteryData.m

@@ -36,4 +36,33 @@ - (instancetype)initWithLevel:(CGFloat)level withState:(UIDeviceBatteryState)sta
     return self;
 }
 
+- (NSString *)stateString
+{
+    switch (_state) {
+        case UIDeviceBatteryStateCharging:
+            return @"Charging";
+            
+        case UIDeviceBatteryStateFull:
+            return @"Full";
+            
+        case UIDeviceBatteryStateUnplugged:
+            return @"Unplugged";
+            
+        case UIDeviceBatteryStateUnknown:
+            return @"Unknown";
+            
+        default:
+            NSLog(@"Warning: Unknown state: %d", (int)_state);
+            return @"Unknown";
+    }
+}
+
+- (NSString *)csvString
+{
+    return [NSString stringWithFormat:@"%f, %@, %f",
+            [self timestampEpoch],
+            [self stateString],
+            _level];
+}
+
 @end

SensingKit/SKDeviceMotionData.h

@@ -39,4 +39,6 @@
                  withRotationRate:(CMRotationRate)rotationRate
              withUserAcceleration:(CMAcceleration)userAcceleration;
 
+- (NSString *)csvString;
+
 @end

SensingKit/SKDeviceMotionData.m

@@ -43,4 +43,26 @@ - (instancetype)initWithAattitude:(CMAttitude *)attitude
     return self;
 }
 
+- (NSString *)csvString
+{
+    return [NSString stringWithFormat:@"%f, %f, %f, %f, %f, %f, %f, %f, %f, %f, %d, %f, %f, %f, %f, %f, %f",
+            [self timestampEpoch],
+            _attitude.roll,
+            _attitude.pitch,
+            _attitude.yaw,
+            _gravity.x,
+            _gravity.y,
+            _gravity.z,
+            _magneticField.field.x,
+            _magneticField.field.y,
+            _magneticField.field.z,
+            _magneticField.accuracy,
+            _rotationRate.x,
+            _rotationRate.y,
+            _rotationRate.z,
+            _userAcceleration.x,
+            _userAcceleration.y,
+            _userAcceleration.z];
+}
+
 @end

SensingKit/SKGyroscopeData.h

@@ -31,4 +31,6 @@
 
 - (instancetype)initWithRotationRate:(CMRotationRate)rotationRate;
 
+- (NSString *)csvString;
+
 @end

SensingKit/SKGyroscopeData.m

@@ -35,4 +35,13 @@ - (instancetype)initWithRotationRate:(CMRotationRate)rotationRate
     return self;
 }
 
+- (NSString *)csvString
+{
+    return [NSString stringWithFormat:@"%f, %f, %f, %f",
+            [self timestampEpoch],
+            _rotationRate.x,
+            _rotationRate.y,
+            _rotationRate.z];
+}
+
 @end