From ae0e26dde0aca09c4471bb7ec4fa3479bba5d0ad Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Thu, 22 Feb 2024 08:02:43 -0800
Subject: Implement Valtrack-V4 protocol

---
 .../org/traccar/protocol/ValtrackProtocol.java     | 41 +++++++++++
 .../traccar/protocol/ValtrackProtocolDecoder.java  | 84 ++++++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/ValtrackProtocol.java
 create mode 100644 src/main/java/org/traccar/protocol/ValtrackProtocolDecoder.java

(limited to 'src/main/java/org')

diff --git a/src/main/java/org/traccar/protocol/ValtrackProtocol.java b/src/main/java/org/traccar/protocol/ValtrackProtocol.java
new file mode 100644
index 000000000..8471a0fd8
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ValtrackProtocol.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2024 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.protocol;
+
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import io.netty.handler.codec.http.HttpRequestDecoder;
+import io.netty.handler.codec.http.HttpResponseEncoder;
+import jakarta.inject.Inject;
+import org.traccar.BaseProtocol;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.config.Config;
+
+public class ValtrackProtocol extends BaseProtocol {
+
+    @Inject
+    public ValtrackProtocol(Config config) {
+        addServer(new TrackerServer(config, getName(), false) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline, Config config) {
+                pipeline.addLast(new HttpResponseEncoder());
+                pipeline.addLast(new HttpRequestDecoder());
+                pipeline.addLast(new HttpObjectAggregator(16384));
+                pipeline.addLast(new ValtrackProtocolDecoder(ValtrackProtocol.this));
+            }
+        });
+    }
+}
diff --git a/src/main/java/org/traccar/protocol/ValtrackProtocolDecoder.java b/src/main/java/org/traccar/protocol/ValtrackProtocolDecoder.java
new file mode 100644
index 000000000..dc9ca8590
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/ValtrackProtocolDecoder.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2024 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.protocol;
+
+import io.netty.channel.Channel;
+import io.netty.handler.codec.http.FullHttpRequest;
+import io.netty.handler.codec.http.HttpResponseStatus;
+import jakarta.json.Json;
+import jakarta.json.JsonArray;
+import jakarta.json.JsonObject;
+import org.traccar.BaseHttpProtocolDecoder;
+import org.traccar.Protocol;
+import org.traccar.model.Position;
+import org.traccar.session.DeviceSession;
+
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.LinkedList;
+import java.util.List;
+
+public class ValtrackProtocolDecoder extends BaseHttpProtocolDecoder {
+
+    public ValtrackProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        FullHttpRequest request = (FullHttpRequest) msg;
+        String content = request.content().toString(StandardCharsets.UTF_8);
+        JsonObject object = Json.createReader(new StringReader(content)).readObject();
+        JsonArray messages = object.getJsonArray("resource");
+
+        List<Position> positions = new LinkedList<>();
+        for (int i = 0; i < messages.size(); i++) {
+
+            JsonObject message = messages.getJsonObject(i);
+            String id = message.getString("devid");
+
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
+            if (deviceSession == null) {
+                continue;
+            }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            position.setValid(true);
+            position.setTime(new Date());
+            position.setLatitude(Double.parseDouble(message.getString("lat")));
+            position.setLongitude(Double.parseDouble(message.getString("lon")));
+            String speed = message.getString("speed");
+            if (!speed.isEmpty()) {
+                position.setSpeed(Double.parseDouble(speed));
+            }
+
+            position.set(Position.KEY_BATTERY, Double.parseDouble(message.getString("vbat")));
+
+            positions.add(position);
+
+        }
+
+        sendResponse(channel, HttpResponseStatus.OK);
+        return positions;
+    }
+
+}
-- 
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