Added multiple fixes to RadarScreen and components

data/src/main/java/com/rtbishop/look4sat/data/repository/SensorsRepo.kt

@@ -17,15 +17,17 @@
  */
 package com.rtbishop.look4sat.data.repository
 
+import android.hardware.GeomagneticField
 import android.hardware.Sensor
 import android.hardware.SensorEvent
 import android.hardware.SensorEventListener
 import android.hardware.SensorManager
+import com.rtbishop.look4sat.domain.predict.GeoPos
 import com.rtbishop.look4sat.domain.predict.RAD2DEG
 import com.rtbishop.look4sat.domain.repository.ISensorsRepo
-import kotlin.math.round
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
+import kotlin.math.round
 
 class SensorsRepo(private val sensorManager: SensorManager, private val sensor: Sensor?) :
     SensorEventListener, ISensorsRepo {
@@ -37,6 +39,12 @@ class SensorsRepo(private val sensorManager: SensorManager, private val sensor:
 
     override val orientation: StateFlow<Pair<Float, Float>> = _orientation
 
+    override fun getMagDeclination(geoPos: GeoPos, time: Long): Float {
+        val latitude = geoPos.latitude.toFloat()
+        val longitude = geoPos.longitude.toFloat()
+        return GeomagneticField(latitude, longitude, geoPos.altitude.toFloat(), time).declination
+    }
+
     override fun enableSensor() {
         sensor?.let { sensorManager.registerListener(this, it, 8000) }
     }

data/src/main/java/com/rtbishop/look4sat/data/usecase/AddToCalendar.kt

@@ -0,0 +1,24 @@
+package com.rtbishop.look4sat.data.usecase
+
+import android.content.ActivityNotFoundException
+import android.content.Context
+import android.content.Intent
+import android.provider.CalendarContract
+import com.rtbishop.look4sat.domain.usecase.IAddToCalendar
+
+class AddToCalendar(private val context: Context) : IAddToCalendar {
+    override fun invoke(name: String, aosTime: Long, losTime: Long) {
+        val intent = Intent(Intent.ACTION_INSERT).apply {
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            setData(CalendarContract.Events.CONTENT_URI)
+            putExtra(CalendarContract.Events.TITLE, name)
+            putExtra(CalendarContract.Events.DESCRIPTION, "Look4Sat Pass")
+            putExtra(CalendarContract.EXTRA_EVENT_BEGIN_TIME, aosTime)
+            putExtra(CalendarContract.EXTRA_EVENT_END_TIME, losTime)
+        }
+        try {
+            context.startActivity(intent)
+        } catch (_: ActivityNotFoundException) {
+        }
+    }
+}