From 8878254a4a3af9d15262fd2553c7b2db0a7bd8bc Mon Sep 17 00:00:00 2001
From: Iván Ávalos <avalos@disroot.org>
Date: Tue, 11 Jan 2022 04:12:45 -0600
Subject: Implemented polygon geofences

---
 .../TrackerMap/android/map/MapFragment.kt          | 92 ++++++++++++++++++----
 1 file changed, 77 insertions(+), 15 deletions(-)

(limited to 'androidApp/src/main/java/mx/trackermap/TrackerMap/android/map/MapFragment.kt')

diff --git a/androidApp/src/main/java/mx/trackermap/TrackerMap/android/map/MapFragment.kt b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/map/MapFragment.kt
index 41cfd50..fa0a56e 100644
--- a/androidApp/src/main/java/mx/trackermap/TrackerMap/android/map/MapFragment.kt
+++ b/androidApp/src/main/java/mx/trackermap/TrackerMap/android/map/MapFragment.kt
@@ -10,8 +10,12 @@ import android.view.ViewGroup
 import androidx.core.content.res.ResourcesCompat
 import androidx.core.graphics.drawable.toBitmap
 import com.mousebird.maply.*
+import mil.nga.sf.Polygon
+import mil.nga.sf.util.SFException
+import mil.nga.sf.wkt.GeometryReader
 import java.io.File
 import mx.trackermap.TrackerMap.android.R
+import mx.trackermap.TrackerMap.client.models.Geofence
 import mx.trackermap.TrackerMap.utils.MarkerType
 
 typealias MarkerCallback = (Int?) -> Unit
@@ -28,6 +32,7 @@ class MapFragment : GlobeMapFragment() {
     var markerCallback: MarkerCallback? = null
 
     private val objects = mutableListOf<ComponentObject>()
+    private val geofenceObjects = mutableListOf<ComponentObject>()
 
     override fun chooseDisplayType(): MapDisplayType {
         return MapDisplayType.Map
@@ -95,12 +100,20 @@ class MapFragment : GlobeMapFragment() {
         markerCallback?.let { it(null) }
     }
 
-    private fun clear() {
-        mapControl.removeObjects(
-            objects,
-            ThreadMode.ThreadAny
-        )
-        objects.clear()
+    private fun clear(geofences: Boolean = false) {
+        if (geofences) {
+            mapControl.removeObjects(
+                geofenceObjects,
+                ThreadMode.ThreadAny
+            )
+            geofenceObjects.clear()
+        } else {
+            mapControl.removeObjects(
+                objects,
+                ThreadMode.ThreadAny
+            )
+            objects.clear()
+        }
     }
 
     fun display(markers: Array<Marker>, isReport: Boolean) {
@@ -108,6 +121,15 @@ class MapFragment : GlobeMapFragment() {
 
         clear()
 
+        val points = markers.map { marker ->
+            Point2d.FromDegrees(marker.longitude, marker.latitude)
+        }.toTypedArray()
+
+        val vectorInfo = VectorInfo()
+        vectorInfo.setColor(Color.GREEN)
+        vectorInfo.setLineWidth(20.0f)
+
+        /* Draw markers for positions */
         val screenMarkers = markers.mapIndexed { i, marker ->
             val screenMarker = ScreenMarker()
             val markerSize = Point2d(144.0, 144.0)
@@ -133,19 +155,11 @@ class MapFragment : GlobeMapFragment() {
             ThreadMode.ThreadAny
         ))
 
-        val points = markers.map { marker ->
-            Point2d.FromDegrees(marker.longitude, marker.latitude)
-        }.toTypedArray()
-
-        // Draw polyline for report
+        /* Draw polyline for report */
         if (isReport && markers.isNotEmpty()) {
             val vector = VectorObject()
             vector.addAreal(points)
 
-            val vectorInfo = VectorInfo()
-            vectorInfo.setColor(Color.GREEN)
-            vectorInfo.setLineWidth(25.0f)
-
             objects.add(mapControl.addVector(
                 vector,
                 vectorInfo,
@@ -168,6 +182,54 @@ class MapFragment : GlobeMapFragment() {
         }
     }
 
+    fun displayGeofences(geofences: Array<Geofence>) {
+        Log.d("MapFragment", "Displaying geofences")
+
+        clear(true)
+
+        val vectorInfoGeofence = VectorInfo()
+        vectorInfoGeofence.setColor(Color.BLUE)
+        vectorInfoGeofence.setLineWidth(10.0f)
+
+        val shapes = mutableListOf<Shape>()
+        val vectors = mutableListOf<VectorObject>()
+
+        geofences.forEach { geofence ->
+            geofence.area?.let { area ->
+                Log.d("MainFragment", "Geofence ${geofence.name} = ${geofence.area}")
+                try {
+                    val geometry = GeometryReader.readGeometry(area)
+                    if (!geometry.isEmpty) {
+                        when (geometry) {
+                            is Polygon -> {
+                                val vector = VectorObject()
+                                vector.addAreal(geometry.exteriorRing.points.map {
+                                    Point2d.FromDegrees(it.y, it.x)
+                                }.toTypedArray())
+
+                                vectors.add(vector)
+                            }
+                        }
+                    }
+                } catch (e: SFException) {
+                    e.printStackTrace()
+                }
+            }
+        }
+
+        geofenceObjects.add(mapControl.addShapes(
+            shapes,
+            ShapeInfo(),
+            ThreadMode.ThreadAny
+        ))
+
+        geofenceObjects.add(mapControl.addVectors(
+            vectors,
+            vectorInfoGeofence,
+            ThreadMode.ThreadAny
+        ))
+    }
+
     fun focusOn(latitude: Double, longitude: Double, zoom: Double = 0.0000144, animated: Boolean = true) {
         val lat = latitude * Math.PI / 180
         val lon = longitude * Math.PI / 180
-- 
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