changs output of getpredictedmenses, adds days to calendar

lib/cycle.js

@@ -163,12 +163,11 @@ export default function config(opts) {
 
   function getPredictedMenses() {
     const allMensesStarts = getAllMensesStarts()
-
     const atLeastOneCycle = allMensesStarts.length > 1
     if (!atLeastOneCycle ||
       allMensesStarts.length < minCyclesForPrediction
     ) {
-      return {}
+      return []
     }
     const cycleLengths = getCycleLength(allMensesStarts)
     const cycleInfo = getCycleLengthStats(cycleLengths)
@@ -181,15 +180,20 @@ export default function config(opts) {
     } else {
       periodStartVariation = 2
     }
-    var lastStart = allMensesStarts[0]
+    if (periodDistance - 5 < periodStartVariation) { // otherwise predictions overlap
+      return []
+    }
+    let lastStart = LocalDate.parse(allMensesStarts[0])
     const predictedMenses = []
     for (let i = 0; i < 3; i++) {
-      lastStart = LocalDate.parse(lastStart).plusDays(periodDistance).toString()
-      const nextPredictedRange = {
-        'startDate': LocalDate.parse(lastStart).minusDays(periodStartVariation).toString(),
-        'endDate': LocalDate.parse(lastStart).plusDays(periodStartVariation).toString()
+      lastStart = lastStart.plusDays(periodDistance)
+      const nextPredictedDates = [lastStart.toString()]
+      for (let j = 0; j < periodStartVariation; j++) {
+        nextPredictedDates.push(lastStart.minusDays(j+1).toString())
+        nextPredictedDates.push(lastStart.plusDays(j+1).toString())
       }
-      predictedMenses.push(nextPredictedRange)
+      nextPredictedDates.sort()
+      predictedMenses.push(nextPredictedDates)
     }
     return predictedMenses
   }