map improvements and GTFS vehicle tracking bases

app/src/main/java/org/pupes/mhdrunpathfinder/HaukUtils.kt

@@ -4,10 +4,15 @@ import android.app.Activity
 import android.os.Handler
 import android.os.Looper
 import android.widget.Toast
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.json.Json
 import okhttp3.OkHttpClient
+import ovh.plrapps.mapcompose.api.addPath
 import ovh.plrapps.mapcompose.api.moveMarker
+import ovh.plrapps.mapcompose.api.removePath
+import ovh.plrapps.mapcompose.api.updatePath
 import java.net.URL
 
 @Serializable
@@ -28,8 +33,9 @@ val haukhttpClient = OkHttpClient.Builder()
 
 private val HaukMainHandler = Handler(Looper.getMainLooper())
 private var HaukTrackingThread: Thread? = null
-private var HaukIsTracking = false
+var HaukIsTracking = false
 
+private var PathCreated = false
 private fun fetchHaukPosition(haukUrl: String, callee: Activity) {
     try {
         val url = URL(haukUrl)
@@ -76,6 +82,18 @@ private fun fetchHaukPosition(haukUrl: String, callee: Activity) {
                     } catch (e: Exception) {
                         // Marker might not exist yet, ignore
                     }
+
+                    pathDataBuilder.addPoint(longitudeToXNormalized(lon), latitudeToYNormalized(lat));
+                    if (!PathCreated) {
+                        mapState.addPath(
+                            "target_path", color = Color(0xFF0000FF),
+                            pathData = pathDataBuilder.build()?: return@post,
+                            width = 1.dp
+                        );
+                        PathCreated = true
+                    }
+                    mapState.updatePath("target_path", pathData = pathDataBuilder.build())
+
                 }
             } else {
                 HaukMainHandler.post {
@@ -95,6 +113,10 @@ fun startHaukTracking(url: String, callee: Activity) {
     if (HaukIsTracking) return
 
     HaukIsTracking = true
+
+
+
+
     HaukTrackingThread = Thread {
         while (HaukIsTracking) {
             fetchHaukPosition(url, callee)
@@ -111,4 +133,6 @@ fun stopHaukTracking() {
     HaukIsTracking = false
     HaukTrackingThread?.interrupt()
     HaukTrackingThread = null
+    mapState.removePath("target_path");
+    PathCreated = false;
 }