fix the code to find the correct arrival route

src/PlugIn.cpp

@@ -19,6 +19,7 @@
 #include <aman/com/AircraftScheduler.h>
 #include <aman/config/CommunicationFileFormat.h>
 #include <aman/config/IdentifierFileFormat.h>
+#include <aman/helper/String.h>
 
 #include "com/ZmqContext.h"
 #include "PlugIn.h"
@@ -199,33 +200,59 @@ void PlugIn::OnRadarTargetPositionUpdate(EuroScopePlugIn::CRadarTarget radarTarg
         break;
     }
 
-    if (2 <= flightPlan.GetExtractedRoute().GetPointsNumber()) {
-        auto currentPosition = radarTarget.GetPosition().GetPosition();
-        int lastIdx = flightPlan.GetExtractedRoute().GetPointsNumber() - 2;
-        auto iafPosition = flightPlan.GetExtractedRoute().GetPointPosition(lastIdx);
-        auto iafName = flightPlan.GetExtractedRoute().GetPointName(lastIdx);
+    auto currentPosition = radarTarget.GetPosition().GetPosition();
+    EuroScopePlugIn::CPosition iafPosition;
+    std::string iafName;
+
+    for (auto element = this->SectorFileElementSelectFirst(EuroScopePlugIn::SECTOR_ELEMENT_STAR);
+         true == element.IsValid();
+         element = this->SectorFileElementSelectNext(element, EuroScopePlugIn::SECTOR_ELEMENT_STAR))
+    {
+        auto split = String::splitString(element.GetName(), " ");
+
+        /* find the correct star */
+        if (0 != split.size() && destination == split[0]) {
+            /* get the IAF */
+            EuroScopePlugIn::CPosition position;
+            if (true == element.GetPosition(&position, 0)) {
+                /* match the waypoints to get the name*/
+                for (int i = 0; i < flightPlan.GetExtractedRoute().GetPointsNumber(); ++i) {
+                    if (1.0f >= flightPlan.GetExtractedRoute().GetPointPosition(i).DistanceTo(position)) {
+                        iafPosition = flightPlan.GetExtractedRoute().GetPointPosition(i);
+                        iafName = flightPlan.GetExtractedRoute().GetPointName(i);
+                        report.set_initialapproachfix(iafName);
+                        break;
+                    }
+                }
+            }
+        }
+
+        if (0 != iafName.length())
+            break;
+    }
+
+    if (0 != iafName.length()) {
         auto iafDistance = currentPosition.DistanceTo(iafPosition);
 
         /* calculate the distance to the IAF */
-        double distanceToIaf = 0.0f, lastDistance = 100000.0f;
-        for (int i = 0; i < flightPlan.GetPositionPredictions().GetPointsNumber(); ++i) {
+        double distanceToIaf = 0.0f, lastIafHeading = 100000.0f;
+        for (int i = 1; i < flightPlan.GetPositionPredictions().GetPointsNumber(); ++i) {
             double distance = flightPlan.GetPositionPredictions().GetPosition(i).DistanceTo(currentPosition);
+            double headingDelta = std::abs(radarTarget.GetPosition().GetReportedHeading() - flightPlan.GetPositionPredictions().GetPosition(i).DirectionTo(iafPosition));
 
             /*
              * 1. no direct way to IAF -> some direct given -> stop after lateral passing
              * 2. passed the IAF on a way to a direct
              */
-            if (distance > lastDistance || iafDistance < distance)
+            if ((90.0 < headingDelta && 270.0 > headingDelta) || iafDistance < distance)
                 break;
 
             distanceToIaf += distance;
-            lastDistance = distance;
+            currentPosition = flightPlan.GetPositionPredictions().GetPosition(i);
         }
-        if (0.0f == distanceToIaf)
+        if (0.01f >= std::abs(distanceToIaf))
             distanceToIaf = iafDistance;
         report.set_distancetoiaf(static_cast<int>(std::round(distanceToIaf)));
-
-        report.set_initialapproachfix(std::string(iafName));
     }
     report.set_destination(std::string(destination));
     report.set_allocated_aircraft(aircraft);