Add LocalInsulin class and update BolusExtension with iobCalc done with LocalInsulin

core/src/main/java/info/nightscout/androidaps/data/LocalInsulin.kt

@@ -0,0 +1,45 @@
+package info.nightscout.androidaps.data
+
+import info.nightscout.androidaps.database.entities.Bolus
+import kotlin.math.exp
+import kotlin.math.pow
+
+class LocalInsulin constructor(val name:String?, val peak:Int = DEFAULT_PEAK, private val userDefinedDia: Double = DEFAULT_DIA) {
+    val dia
+        get(): Double {
+            val dia = userDefinedDia
+            return if (dia >= MIN_DIA) {
+                dia
+            } else {
+                MIN_DIA
+            }
+        }
+
+    val duration
+        get() = (60 * 60 * 1000L * dia).toLong()
+
+    fun iobCalcForTreatment(bolus: Bolus, time: Long): Iob {
+        val result = Iob()
+        if (bolus.amount != 0.0) {
+            val bolusTime = bolus.timestamp
+            val t = (time - bolusTime) / 1000.0 / 60.0
+            val td = dia * 60 //getDIA() always >= MIN_DIA
+            val tp = peak.toDouble()
+            // force the IOB to 0 if over DIA hours have passed
+            if (t < td) {
+                val tau = tp * (1 - tp / td) / (1 - 2 * tp / td)
+                val a = 2 * tau / td
+                val S = 1 / (1 - a + (1 + a) * exp(-td / tau))
+                result.activityContrib = bolus.amount * (S / tau.pow(2.0)) * t * (1 - t / td) * exp(-t / tau)
+                result.iobContrib = bolus.amount * (1 - S * (1 - a) * ((t.pow(2.0) / (tau * td * (1 - a)) - t / tau - 1) * Math.exp(-t / tau) + 1))
+            }
+        }
+        return result
+    }
+
+    companion object {
+        private const val MIN_DIA = 5.0
+        private const val DEFAULT_DIA = 6.0
+        private const val DEFAULT_PEAK = 75
+    }
+}

core/src/main/java/info/nightscout/androidaps/extensions/BolusExtension.kt

@@ -1,6 +1,7 @@
 package info.nightscout.androidaps.extensions
 
 import info.nightscout.androidaps.data.Iob
+import info.nightscout.androidaps.data.LocalInsulin
 import info.nightscout.androidaps.database.embedments.InterfaceIDs
 import info.nightscout.androidaps.database.entities.Bolus
 import info.nightscout.androidaps.database.entities.TherapyEvent
@@ -16,6 +17,12 @@ fun Bolus.iobCalc(activePlugin: ActivePlugin, time: Long, dia: Double): Iob {
     return insulinInterface.iobCalcForTreatment(this, time, dia)
 }
 
+// Add specific calculation for Autotune (reference localInsulin for Peak/dia)
+fun Bolus.iobCalc(time: Long, localInsulin: LocalInsulin): Iob {
+    if (!isValid  || type == Bolus.Type.PRIMING ) return Iob()
+    return localInsulin.iobCalcForTreatment(this, time)
+}
+
 fun Bolus.toJson(isAdd: Boolean, dateUtil: DateUtil): JSONObject =
     JSONObject()
         .put("eventType", if (type == Bolus.Type.SMB) TherapyEvent.Type.CORRECTION_BOLUS.text else TherapyEvent.Type.MEAL_BOLUS.text)