Implement GPX export (fix #4646)

1 files changed, 76 insertions, 0 deletions

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>");
+        }
+    }
+
+}