1 files changed, 79 insertions, 0 deletions
diff --git a/web/app/GeofenceConverter.js b/web/app/GeofenceConverter.js
new file mode 100644
index 000000000..d104ef127
--- /dev/null
+++ b/web/app/GeofenceConverter.js
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+Ext.define('Traccar.GeofenceConverter', {
+    singleton: true,
+
+    wktToGeometry: function (mapView, wkt) {
+        var geometry, projection, resolutionAtEquator, pointResolution, resolutionFactor, points = [], center, radius,
+                content, i, lat, lon, coordinates;
+        if (wkt.startsWith("POLYGON")) {
+            content = wkt.match(/\([^\(\)]+\)/);
+            if (content !== null) {
+                coordinates = content[0].match(/-?\d+\.?\d*/g);
+                if (coordinates !== null) {
+                    projection = mapView.getProjection();
+                    for (i = 0; i < coordinates.length; i += 2) {
+                        lat = Number(coordinates[i]);
+                        lon = Number(coordinates[i + 1]);
+                        points.push(ol.proj.transform([lon, lat], 'EPSG:4326', projection));
+                    }
+                    geometry = new ol.geom.Polygon([points]);
+                }
+            }
+        } else if (wkt.startsWith("CIRCLE")) {
+            content = wkt.match(/\([^\(\)]+\)/);
+            if (content !== null) {
+                coordinates = content[0].match(/-?\d+\.?\d*/g);
+                if (coordinates !== null) {
+                    projection = mapView.getProjection();
+                    center = ol.proj.transform([Number(coordinates[1]), Number(coordinates[0])], 'EPSG:4326', projection);
+                    resolutionAtEquator = mapView.getResolution();
+                    pointResolution = projection.getPointResolution(resolutionAtEquator, center);
+                    resolutionFactor = resolutionAtEquator / pointResolution;
+                    radius = (Number(coordinates[2]) / ol.proj.METERS_PER_UNIT.m) * resolutionFactor;
+                    geometry = new ol.geom.Circle(center, radius);
+                }
+            }
+        }
+        return geometry;
+    },
+
+    geometryToWkt: function (projection, geometry) {
+        var result, i, center, radius, edgeCoordinate, earthSphere, groundRadius, points;
+        if (geometry instanceof ol.geom.Circle) {
+            center = geometry.getCenter();
+            radius = geometry.getRadius();
+            edgeCoordinate = [center[0] + radius, center[1]];
+            center = ol.proj.transform(center, projection, 'EPSG:4326');
+            earthSphere = new ol.Sphere(6378137);
+            groundRadius = earthSphere.haversineDistance(center,
+                ol.proj.transform(edgeCoordinate, projection, 'EPSG:4326'));
+            result = "CIRCLE (";
+            result += center[1] + " " + center[0] + ", ";
+            result += Number((groundRadius).toFixed(1)) + ")";
+        } else if (geometry instanceof ol.geom.Polygon) {
+            geometry.transform(projection, 'EPSG:4326');
+            points = geometry.getCoordinates();
+            result = "POLYGON((";
+            for (i = 0; i < points[0].length; i += 1) {
+                result += points[0][i][1] + " " + points[0][i][0] + ", ";
+            }
+            result = result.substring(0, result.length - 2) + "))";
+        }
+        return result;
+    }
+});