emelko
26 lines
910 B
JavaScript
26 lines
910 B
JavaScript
import { LocalDate } from 'js-joda'
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import getNfpStatus from './index'
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export default function (previousCycles, secondarySymptom) {
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const fhms = previousCycles
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.map(cycle => {
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const status = getNfpStatus({ cycle, secondarySymptom })
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if (status.temperatureShift) {
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const day = status.temperatureShift.firstHighMeasurementDay
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const firstCycleDayDate = LocalDate.parse(cycle[0].date)
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const fhmDate = LocalDate.parse(day.date)
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return fhmDate.compareTo(firstCycleDayDate) + 1
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}
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return null
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})
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.filter(val => typeof val === 'number')
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const preOvuLength = Math.min(...fhms) - 8
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// pre ovu length may only be lengthened if we have more than 12 previous fhms
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// if pre ovu length is less than 5, it shortened even with fewer prev fhms
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if (preOvuLength < 5) return preOvuLength
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if (fhms.length >= 12) return preOvuLength
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return null
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} |