Implement second exception rule

lib/sensiplan.js

@@ -42,6 +42,7 @@ function detectTemperatureShift(temperaturesOfCycle) {
 }
 
 function rounded(val, step) {
+  // we round the difference because of JS decimal weirdness
   const inverted = 1 / step
   return Math.round(val * inverted) / inverted
 }
@@ -73,6 +74,16 @@ function checkIfFirstHighMeasurement(temp, i, temps, ltl) {
     }
   }
 
+  if (secondExceptionRuleApplies(temp, nextTemps, ltl)) {
+    return {
+      isFirstHighMeasurement: true,
+      rules: {
+        secondException: true,
+      },
+      ltl
+    }
+  }
+
   return {
     isFirstHighMeasurement: false
   }
@@ -81,18 +92,37 @@ function checkIfFirstHighMeasurement(temp, i, temps, ltl) {
 function regularRuleApplies(temp, nextTemps, ltl) {
   if (!nextTemps.every(temp => temp > ltl)) return false
   const thirdTemp = nextTemps[1]
-  // we round the difference because of JS decimal weirdness
   if (rounded(thirdTemp - ltl, 0.1) < 0.2) return false
   return true
 }
 
 function firstExceptionRuleApplies(temp, nextTemps, ltl) {
+  if (nextTemps.length < 3) return false
   if (!nextTemps.every(temp => temp > ltl)) return false
   const fourthTemp = nextTemps[2]
   if (fourthTemp > ltl) return true
   return false
 }
 
+function secondExceptionRuleApplies(temp, nextTemps, ltl) {
+  if (nextTemps.length < 3) return false
+  if (secondOrThirdTempIsAtOrBelowLtl(nextTemps, ltl)) {
+    const fourthTemp = nextTemps[2]
+    if (rounded(fourthTemp - ltl, 0.1) >= 0.2) return true
+  }
+  return false
+}
+
+function secondOrThirdTempIsAtOrBelowLtl(nextTemps, ltl) {
+  const secondIsLow = nextTemps[0] <= ltl
+  const thirdIsLow = nextTemps[1] <= ltl
+  if ((secondIsLow || thirdIsLow) && !(secondIsLow && thirdIsLow)) {
+    return true
+  } else {
+    return false
+  }
+}
+
 export {
   detectTemperatureShift
 }