import HealthKit

class HealthKitManager {

    class var sharedInstance: HealthKitManager {
        struct Singleton {
            static let instance = HealthKitManager()
        }

        return Singleton.instance
    }

    let healthStore: HKHealthStore? = {
        if HKHealthStore.isHealthDataAvailable() {
            return HKHealthStore()
        } else {
            return nil
        }
    }()

    let stepsCount = HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)

    let stepsUnit = HKUnit.count()
}