AddMedicationScreen.kt

private fun validateMedication(
    name: String,
    dosage: Int,
    recurrence: String,
    endDate: Long,
    morningSelection: Boolean,
    afternoonSelection: Boolean,
    eveningSelection: Boolean,
    nightSelection: Boolean,
    onInvalidate: (Int) -> Unit,
    onValidate: () -> Unit
) {
    if (name.isEmpty()) {
        onInvalidate(R.string.medication_name)
        return
    }

    if (dosage < 1) {
        onInvalidate(R.string.dosage)
        return
    }

    if (endDate < 1) {
        onInvalidate(R.string.end_date)
        return
    }

    if (!morningSelection && !afternoonSelection && !eveningSelection && !nightSelection) {
        onInvalidate(R.string.times_of_day)
        return
    }

    val timesOfDay = mutableListOf<TimesOfDay>()
    if (morningSelection) timesOfDay.add(TimesOfDay.Morning)
    if (afternoonSelection) timesOfDay.add(TimesOfDay.Afternoon)
    if (eveningSelection) timesOfDay.add(TimesOfDay.Evening)
    if (nightSelection) timesOfDay.add(TimesOfDay.Night)

    // TODO: Out of scope for this blog post.
    onValidate()
}