Combine temp and mucus evaluation

lib/sympto/index.js

@@ -1,12 +1,19 @@
-import getTemperatureStatus from './temperature'
-import getMucusStatus from './mucus'
+import getTemperatureShift from './temperature'
+import getMucusShift from './mucus'
 
 export default function (cycleDays) {
-  const temperatureStatus = getTemperatureStatus(cycleDays)
-  const mucusStatus = getMucusStatus(cycleDays)
+  const assumeFertile = { assumeFertility: true }
+
+  const temperatureShift = getTemperatureShift(cycleDays)
+  if (!temperatureShift.detected) return assumeFertile
+
+  const tempEvalEndIndex = cycleDays.indexOf(temperatureShift.evaluationCompleteDay)
+  const mucusShift = getMucusShift(cycleDays, tempEvalEndIndex)
+  if (!mucusShift.detected) return assumeFertile
+
   return {
-    assumeFertility: true,
-    temperatureStatus,
-    mucusStatus
+    assumeFertility: false,
+    temperatureShift,
+    mucusShift
   }
 }

lib/sympto/mucus.js

@@ -1,13 +1,25 @@
-export default function (cycleDays) {
+export default function (cycleDays, tempEvalEndIndex) {
   const mucusDays = cycleDays.filter(day => day.mucus && !day.mucus.exclude)
   const bestQuality = Math.max(...mucusDays.map(day => day.mucus.value))
-  const mucusPeak = mucusDays.find((day, i) => {
-    if (day.mucus.value !== bestQuality) return false
 
-    const threeFollowingDays = mucusDays.slice(i + 1, i + 4)
+  const mucusPeak = cycleDays.find((day, i) => {
+    if (!mucusDays.includes(day) || day.mucus.value !== bestQuality) return false
+
+    // sensiplan says the three following days must be of lower quality
+    // AND no best quality day may occur until temperature evaluation has
+    // been completed
+    const mucusDaysIndex = mucusDays.indexOf(day)
+    const threeFollowingDays = mucusDays.slice(mucusDaysIndex + 1, mucusDaysIndex + 4)
     if (threeFollowingDays.length < 3) return false
 
-    return threeFollowingDays.every(day => day.mucus.value < bestQuality)
+    const bestQualityOccurringIn3FollowingDays = threeFollowingDays.some(day => day.mucus.value >= bestQuality)
+    if (bestQualityOccurringIn3FollowingDays) return false
+
+    const relevantDays = cycleDays
+      .slice(i + 1, tempEvalEndIndex + 1)
+      .filter(day => day.mucus && !day.mucus.exclude)
+
+    return relevantDays.every(day => day.mucus.value < bestQuality)
   })
 
   if (!mucusPeak) return { detected: false }
@@ -17,3 +29,4 @@ export default function (cycleDays) {
     mucusPeak
   }
 }
+

lib/sympto/temperature.js

@@ -1,4 +1,4 @@
-export default function getTemperatureStatus(cycleDays) {
+export default function (cycleDays) {
   const temperatureDays = cycleDays
     .filter(day => day.temperature && !day.temperature.exclude)
     .map(day => {