Implement polyline geofence

5 files changed, 142 insertions, 29 deletions

diff --git a/src/org/traccar/geofence/GeofenceGeometry.java b/src/org/traccar/geofence/GeofenceGeometry.java
index 6b5b0acb7..d61e357ce 100644
--- a/src/org/traccar/geofence/GeofenceGeometry.java
+++ b/src/org/traccar/geofence/GeofenceGeometry.java
@@ -25,4 +25,33 @@ public abstract class GeofenceGeometry {
 
     public abstract void fromWkt(String wkt) throws ParseException;
 
+    public static class Coordinate {
+
+        public static final double DEGREE360 = 360;
+
+        private double lat;
+        private double lon;
+
+        public double getLat() {
+            return lat;
+        }
+
+        public void setLat(double lat) {
+            this.lat = lat;
+        }
+
+        public double getLon() {
+            return lon;
+        }
+
+        // Need not to confuse algorithm by the abrupt reset of longitude
+        public double getLon360() {
+            return lon + DEGREE360;
+        }
+
+        public void setLon(double lon) {
+            this.lon = lon;
+        }
+    }
+
 }
diff --git a/src/org/traccar/geofence/GeofencePolygon.java b/src/org/traccar/geofence/GeofencePolygon.java
index 03638d6c9..48326dc10 100644
--- a/src/org/traccar/geofence/GeofencePolygon.java
+++ b/src/org/traccar/geofence/GeofencePolygon.java
@@ -27,35 +27,6 @@ public class GeofencePolygon extends GeofenceGeometry {
         fromWkt(wkt);
     }
 
-    private static class Coordinate {
-
-        public static final double DEGREE360 = 360;
-
-        private double lat;
-        private double lon;
-
-        public double getLat() {
-            return lat;
-        }
-
-        public void setLat(double lat) {
-            this.lat = lat;
-        }
-
-        public double getLon() {
-            return lon;
-        }
-
-        // Need not to confuse algorithm by the abrupt reset of longitude
-        public double getLon360() {
-            return lon + DEGREE360;
-        }
-
-        public void setLon(double lon) {
-            this.lon = lon;
-        }
-    }
-
     private ArrayList<Coordinate> coordinates;
 
     private double[] constant;
diff --git a/src/org/traccar/geofence/GeofencePolyline.java b/src/org/traccar/geofence/GeofencePolyline.java
new file mode 100644
index 000000000..60d7b0605
--- /dev/null
+++ b/src/org/traccar/geofence/GeofencePolyline.java
@@ -0,0 +1,92 @@
+package org.traccar.geofence;
+
+import java.text.ParseException;
+import java.util.ArrayList;
+
+import org.traccar.helper.DistanceCalculator;
+
+public class GeofencePolyline extends GeofenceGeometry {
+
+    private ArrayList<Coordinate> coordinates;
+    private double distance;
+
+    public GeofencePolyline() {
+    }
+
+    public GeofencePolyline(String wkt, double distance) throws ParseException {
+        fromWkt(wkt);
+        this.distance = distance;
+    }
+
+    @Override
+    public boolean containsPoint(double latitude, double longitude) {
+        double longitude360 = longitude + Coordinate.DEGREE360;
+        for (int i = 1; i < coordinates.size(); i++) {
+            if (DistanceCalculator.distanceToInterval(
+                    latitude, longitude360, coordinates.get(i - 1).getLat(), coordinates.get(i - 1).getLon360(),
+                    coordinates.get(i).getLat(), coordinates.get(i).getLon360()) <= distance) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public String toWkt() {
+        StringBuilder buf = new StringBuilder();
+        buf.append("LINESTRING (");
+        for (Coordinate coordinate : coordinates) {
+            buf.append(String.valueOf(coordinate.getLat()));
+            buf.append(" ");
+            buf.append(String.valueOf(coordinate.getLon()));
+            buf.append(", ");
+        }
+        return buf.substring(0, buf.length() - 2) + ")";
+    }
+
+    @Override
+    public void fromWkt(String wkt) throws ParseException {
+        if (coordinates == null) {
+            coordinates = new ArrayList<>();
+        } else {
+            coordinates.clear();
+        }
+
+        if (!wkt.startsWith("LINESTRING")) {
+            throw new ParseException("Mismatch geometry type", 0);
+        }
+        String content = wkt.substring(wkt.indexOf("(") + 1, wkt.indexOf(")"));
+        if (content.isEmpty()) {
+            throw new ParseException("No content", 0);
+        }
+        String[] commaTokens = content.split(",");
+        if (commaTokens.length < 2) {
+            throw new ParseException("Not valid content", 0);
+        }
+
+        for (String commaToken : commaTokens) {
+            String[] tokens = commaToken.trim().split("\\s");
+            if (tokens.length != 2) {
+                throw new ParseException("Here must be two coordinates: " + commaToken, 0);
+            }
+            Coordinate coordinate = new Coordinate();
+            try {
+                coordinate.setLat(Double.parseDouble(tokens[0]));
+            } catch (NumberFormatException e) {
+                throw new ParseException(tokens[0] + " is not a double", 0);
+            }
+            try {
+                coordinate.setLon(Double.parseDouble(tokens[1]));
+            } catch (NumberFormatException e) {
+                throw new ParseException(tokens[1] + " is not a double", 0);
+            }
+            coordinates.add(coordinate);
+        }
+
+    }
+
+    public void setDistance(double distance) {
+        this.distance = distance;
+    }
+
+}
diff --git a/src/org/traccar/helper/DistanceCalculator.java b/src/org/traccar/helper/DistanceCalculator.java
index 3452597ab..ceeee4be4 100644
--- a/src/org/traccar/helper/DistanceCalculator.java
+++ b/src/org/traccar/helper/DistanceCalculator.java
@@ -33,4 +33,20 @@ public final class DistanceCalculator {
         return d * 1000;
     }
 
+    public static double distanceToInterval(
+            double pointLat, double pointLon, double lat1, double lon1, double lat2, double lon2) {
+        double d0 = distance(pointLat, pointLon, lat1, lon1);
+        double d1 = distance(lat1, lon1, lat2, lon2);
+        double d2 = distance(lat2, lon2, pointLat, pointLon);
+        if (Math.pow(d0, 2) > Math.pow(d1, 2) + Math.pow(d2, 2)) {
+            return d2;
+        }
+        if (Math.pow(d2, 2) > Math.pow(d1, 2) + Math.pow(d0, 2)) {
+            return d0;
+        }
+        double halfP = (d0 + d1 + d2) * 0.5;
+        double area = Math.sqrt(halfP * (halfP - d0) * (halfP - d1) * (halfP - d2));
+        return 2 * area / d1;
+    }
+
 }
diff --git a/src/org/traccar/model/Geofence.java b/src/org/traccar/model/Geofence.java
index ecfd3101c..326c45b5f 100644
--- a/src/org/traccar/model/Geofence.java
+++ b/src/org/traccar/model/Geofence.java
@@ -17,9 +17,11 @@ package org.traccar.model;
 
 import java.text.ParseException;
 
+import org.traccar.Context;
 import org.traccar.geofence.GeofenceCircle;
 import org.traccar.geofence.GeofenceGeometry;
 import org.traccar.geofence.GeofencePolygon;
+import org.traccar.geofence.GeofencePolyline;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 
@@ -27,6 +29,7 @@ public class Geofence extends Extensible {
 
     public static final String TYPE_GEOFENCE_CILCLE = "geofenceCircle";
     public static final String TYPE_GEOFENCE_POLYGON = "geofencePolygon";
+    public static final String TYPE_GEOFENCE_POLYLINE = "geofencePolyline";
 
     private String name;
 
@@ -60,6 +63,8 @@ public class Geofence extends Extensible {
             geometry = new GeofenceCircle(area);
         } else if (area.startsWith("POLYGON")) {
             geometry = new GeofencePolygon(area);
+        } else if (area.startsWith("LINESTRING")) {
+            geometry = new GeofencePolyline(area, Context.getConfig().getDouble("geofence.polylineDistance", 25));
         } else {
             throw new ParseException("Unknown geometry type", 0);
         }