nullobjectpattern-bad-usage.kt

interface Storage {
    fun save(workout: Workout)
}

class LocalStorage : Storage {
    override fun save(workout: Workout) {
        // it saves in our database
    }
}

class CloudStorage : Storage {
    override fun save(workout: Workout) {
        // it saves in someone else's database
    }
}

object NullStorage : Storage {
    override fun save(workout: Workout) {
        // it does nothing
    }
}

fun getStorage(type: String): Storage {
    return when (type) {
        "local" -> LocalStorage()
        "cloud " -> CloudStorage()
        else -> NullStorage
    }
}