From 38961efd25373f290bb20780f770d17b425de88c Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Wed, 3 Aug 2022 08:35:57 -0700
Subject: Implement GPX export (fix #4646)

---
 .../org/traccar/api/resource/PositionResource.java | 22 +++++++
 .../org/traccar/reports/GpxExportProvider.java     | 76 ++++++++++++++++++++++
 2 files changed, 98 insertions(+)
 create mode 100644 src/main/java/org/traccar/reports/GpxExportProvider.java

(limited to 'src/main/java')

diff --git a/src/main/java/org/traccar/api/resource/PositionResource.java b/src/main/java/org/traccar/api/resource/PositionResource.java
index b4c8d18b9..7d7921085 100644
--- a/src/main/java/org/traccar/api/resource/PositionResource.java
+++ b/src/main/java/org/traccar/api/resource/PositionResource.java
@@ -21,6 +21,7 @@ import org.traccar.model.Device;
 import org.traccar.model.Position;
 import org.traccar.model.UserRestrictions;
 import org.traccar.reports.CsvExportProvider;
+import org.traccar.reports.GpxExportProvider;
 import org.traccar.reports.KmlExportProvider;
 import org.traccar.storage.StorageException;
 import org.traccar.storage.query.Columns;
@@ -54,6 +55,9 @@ public class PositionResource extends BaseResource {
     @Inject
     private CsvExportProvider csvExportProvider;
 
+    @Inject
+    private GpxExportProvider gpxExportProvider;
+
     @GET
     public Collection<Position> getJson(
             @QueryParam("deviceId") long deviceId, @QueryParam("id") List<Long> positionIds,
@@ -118,4 +122,22 @@ public class PositionResource extends BaseResource {
                 .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=positions.csv").build();
     }
 
+    @Path("gpx")
+    @GET
+    @Produces("application/gpx+xml")
+    public Response getGpx(
+            @QueryParam("deviceId") long deviceId,
+            @QueryParam("from") Date from, @QueryParam("to") Date to) throws StorageException {
+        permissionsService.checkPermission(Device.class, getUserId(), deviceId);
+        StreamingOutput stream = output -> {
+            try {
+                gpxExportProvider.generate(output, deviceId, from, to);
+            } catch (StorageException e) {
+                throw new WebApplicationException(e);
+            }
+        };
+        return Response.ok(stream)
+                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=positions.gpx").build();
+    }
+
 }
diff --git a/src/main/java/org/traccar/reports/GpxExportProvider.java b/src/main/java/org/traccar/reports/GpxExportProvider.java
new file mode 100644
index 000000000..f1a0f292d
--- /dev/null
+++ b/src/main/java/org/traccar/reports/GpxExportProvider.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2022 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.
+ */
+package org.traccar.reports;
+
+import org.traccar.helper.DateUtil;
+import org.traccar.helper.model.PositionUtil;
+import org.traccar.model.Device;
+import org.traccar.storage.Storage;
+import org.traccar.storage.StorageException;
+import org.traccar.storage.query.Columns;
+import org.traccar.storage.query.Condition;
+import org.traccar.storage.query.Request;
+
+import javax.inject.Inject;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.util.Date;
+
+public class GpxExportProvider {
+
+    private final Storage storage;
+
+    @Inject
+    public GpxExportProvider(Storage storage) {
+        this.storage = storage;
+    }
+
+    public void generate(
+            OutputStream outputStream, long deviceId, Date from, Date to) throws StorageException {
+
+        var device = storage.getObject(Device.class, new Request(
+                new Columns.All(), new Condition.Equals("id", "id", deviceId)));
+        var positions = PositionUtil.getPositions(storage, deviceId, from, to);
+
+        try (PrintWriter writer = new PrintWriter(outputStream)) {
+            writer.print("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
+            writer.print("<gpx version=\"1.0\">");
+            writer.print("<trk>");
+            writer.print("<name>");
+            writer.print(device.getName());
+            writer.print("</name>");
+            writer.print("<trkseg>");
+            positions.forEach(position -> {
+                writer.print("<trkpt lat=\"");
+                writer.print(position.getLatitude());
+                writer.print("\" lon=\"");
+                writer.print(position.getLongitude());
+                writer.print("\">");
+                writer.print("<ele>");
+                writer.print(position.getAltitude());
+                writer.print("</ele>");
+                writer.print("<time>");
+                writer.print(DateUtil.formatDate(position.getFixTime()));
+                writer.print("</time>");
+                writer.print("</trkpt>");
+            });
+            writer.print("</trkseg>");
+            writer.print("</trk>");
+            writer.print("</gpx>");
+        }
+    }
+
+}
-- 
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