Add FlexAPI protocol support

1 files changed, 85 insertions, 0 deletions

diff --git a/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java b/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java
new file mode 100644
index 000000000..d2b3c6960
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/FlexApiProtocolDecoder.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2021 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 org.traccar.BaseProtocolDecoder;
+import org.traccar.DeviceSession;
+import org.traccar.Protocol;
+import org.traccar.model.Position;
+
+import javax.json.Json;
+import javax.json.JsonObject;
+import java.io.StringReader;
+import java.net.SocketAddress;
+import java.util.Date;
+
+public class FlexApiProtocolDecoder extends BaseProtocolDecoder {
+
+    public FlexApiProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String message = (String) msg;
+        JsonObject root = Json.createReader(new StringReader(message.substring(1, message.length() - 2))).readObject();
+
+        String topic = root.getString("topic");
+        String clientId = topic.substring(3, topic.indexOf('/', 3));
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, clientId);
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        JsonObject payload = root.getJsonObject("payload");
+
+        if (topic.contains("gnss")) {
+
+            position.setValid(true);
+            position.setTime(new Date(payload.getInt("time") * 1000L));
+            position.setLatitude(payload.getJsonNumber("lat").doubleValue());
+            position.setLongitude(payload.getJsonNumber("log").doubleValue());
+            position.setAltitude(payload.getJsonNumber("gnss.altitude").doubleValue());
+            position.setSpeed(payload.getJsonNumber("gnss.speed").doubleValue());
+            position.setCourse(payload.getJsonNumber("gnss.heading").doubleValue());
+
+            position.set(Position.KEY_SATELLITES, payload.getInt("gnss.num_sv"));
+
+        } else if (topic.contains("obd")) {
+
+            getLastLocation(position, new Date(payload.getInt("obd.ts") * 1000L));
+
+            position.set(Position.KEY_OBD_SPEED, payload.getJsonNumber("obd.speed").doubleValue());
+            position.set(Position.KEY_OBD_ODOMETER, payload.getInt("obd.odo"));
+            position.set(Position.KEY_RPM, payload.getInt("obd.rpm"));
+            position.set(Position.KEY_VIN, payload.getString("obd.vin"));
+
+        } else {
+
+            return null;
+
+        }
+
+        return position;
+    }
+
+}