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Extract getLastMensesStart

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This commit is contained in:
Julia Friesel
2018-06-28 15:16:21 +02:00
parent ecbd00a3f9
commit 33393f498a
2 changed files with 40 additions and 31 deletions
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lib/get-cycle-day-number.js
+6 -31
View File
@@ -1,6 +1,5 @@
import * as joda from 'js-joda'
const LocalDate = joda.LocalDate
import getLastMensesStart from './get-last-menses-start'
export default function config(opts = {}) {
let bleedingDaysSortedByDate
@@ -12,37 +11,13 @@ export default function config(opts = {}) {
}
const maxBreakInBleeding = opts.maxBreakInBleeding || 1
return function getCycleDayNumber(targetDateString) {
const targetDate = LocalDate.parse(targetDateString)
const withWrappedDates = bleedingDaysSortedByDate
.filter(day => !day.bleeding.exclude)
.map(day => {
day.wrappedDate = LocalDate.parse(day.date)
return day
})
const firstBleedingDayBeforeTargetDayIndex = withWrappedDates.findIndex(day => {
return (
day.wrappedDate.isEqual(targetDate) ||
day.wrappedDate.isBefore(targetDate)
)
})
if (firstBleedingDayBeforeTargetDayIndex < 0) return null
const previousBleedingDays = withWrappedDates.slice(firstBleedingDayBeforeTargetDayIndex)
const lastPeriodStart = previousBleedingDays.find((day, i) => {
return thereIsNoPreviousBleedingDayWithinTheThreshold(day, previousBleedingDays.slice(i + 1), maxBreakInBleeding)
})
const diffInDays = lastPeriodStart.wrappedDate.until(targetDate, joda.ChronoUnit.DAYS)
return function(targetDateString) {
const lastMensesStart = getLastMensesStart(targetDateString, bleedingDaysSortedByDate, maxBreakInBleeding)
if (!lastMensesStart) return null
const targetDate = joda.LocalDate.parse(targetDateString)
const diffInDays = lastMensesStart.wrappedDate.until(targetDate, joda.ChronoUnit.DAYS)
// cycle starts at day 1
return diffInDays + 1
}
}
function thereIsNoPreviousBleedingDayWithinTheThreshold(bleedingDay, earlierCycleDays, allowedBleedingBreak) {
const periodThreshold = bleedingDay.wrappedDate.minusDays(allowedBleedingBreak + 1)
return !earlierCycleDays.some(({ wrappedDate }) => wrappedDate.equals(periodThreshold) || wrappedDate.isAfter(periodThreshold))
}
lib/get-last-menses-start.js
+34
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@@ -0,0 +1,34 @@
import * as joda from 'js-joda'
const LocalDate = joda.LocalDate
export default function getLastMensesStart(targetDateString, bleedingDaysSortedByDate, maxBreakInBleeding) {
const targetDate = LocalDate.parse(targetDateString)
const withWrappedDates = bleedingDaysSortedByDate
.filter(day => !day.bleeding.exclude)
.map(day => {
day.wrappedDate = LocalDate.parse(day.date)
return day
})
const firstBleedingDayBeforeTargetDayIndex = withWrappedDates.findIndex(day => {
return (
day.wrappedDate.isEqual(targetDate) ||
day.wrappedDate.isBefore(targetDate)
)
})
if (firstBleedingDayBeforeTargetDayIndex < 0) return null
const previousBleedingDays = withWrappedDates.slice(firstBleedingDayBeforeTargetDayIndex)
const lastPeriodStart = previousBleedingDays.find((day, i) => {
return thereIsNoPreviousBleedingDayWithinTheThreshold(day, previousBleedingDays.slice(i + 1), maxBreakInBleeding)
})
return lastPeriodStart
}
function thereIsNoPreviousBleedingDayWithinTheThreshold(bleedingDay, earlierCycleDays, allowedBleedingBreak) {
const periodThreshold = bleedingDay.wrappedDate.minusDays(allowedBleedingBreak + 1)
return !earlierCycleDays.some(({ wrappedDate }) => wrappedDate.equals(periodThreshold) || wrappedDate.isAfter(periodThreshold))
}