From 1ae9886ad10edcbc876a5295021f86bb7e534fde Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Sat, 9 Sep 2023 11:21:53 -0700
Subject: Implement NTO protocol

---
 .../java/org/traccar/protocol/NtoProtocol.java     | 42 +++++++++++
 .../org/traccar/protocol/NtoProtocolDecoder.java   | 82 ++++++++++++++++++++++
 2 files changed, 124 insertions(+)
 create mode 100644 src/main/java/org/traccar/protocol/NtoProtocol.java
 create mode 100644 src/main/java/org/traccar/protocol/NtoProtocolDecoder.java

(limited to 'src/main')

diff --git a/src/main/java/org/traccar/protocol/NtoProtocol.java b/src/main/java/org/traccar/protocol/NtoProtocol.java
new file mode 100644
index 000000000..d3596e287
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NtoProtocol.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2023 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.string.StringDecoder;
+import io.netty.handler.codec.string.StringEncoder;
+import jakarta.inject.Inject;
+import org.traccar.BaseProtocol;
+import org.traccar.CharacterDelimiterFrameDecoder;
+import org.traccar.PipelineBuilder;
+import org.traccar.TrackerServer;
+import org.traccar.config.Config;
+
+public class NtoProtocol extends BaseProtocol {
+
+    @Inject
+    public NtoProtocol(Config config) {
+        addServer(new TrackerServer(config, getName(), false) {
+            @Override
+            protected void addProtocolHandlers(PipelineBuilder pipeline, Config config) {
+                pipeline.addLast(new CharacterDelimiterFrameDecoder(1024, '&'));
+                pipeline.addLast(new StringEncoder());
+                pipeline.addLast(new StringDecoder());
+                pipeline.addLast(new NtoProtocolDecoder(NtoProtocol.this));
+            }
+        });
+    }
+
+}
diff --git a/src/main/java/org/traccar/protocol/NtoProtocolDecoder.java b/src/main/java/org/traccar/protocol/NtoProtocolDecoder.java
new file mode 100644
index 000000000..bbdae485e
--- /dev/null
+++ b/src/main/java/org/traccar/protocol/NtoProtocolDecoder.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2023 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.Protocol;
+import org.traccar.helper.Parser;
+import org.traccar.helper.PatternBuilder;
+import org.traccar.model.Position;
+import org.traccar.session.DeviceSession;
+
+import java.net.SocketAddress;
+import java.util.regex.Pattern;
+
+public class NtoProtocolDecoder extends BaseProtocolDecoder {
+
+    public NtoProtocolDecoder(Protocol protocol) {
+        super(protocol);
+    }
+
+    private static final Pattern PATTERN = new PatternBuilder()
+            .text("^NB,")                        // manufacturer
+            .number("(d+),")                     // imei
+            .expression("(...),")                // type
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .number("(dd)(dd)(dd),")             // time (hhmmss)
+            .expression("([AVM]),")              // validity
+            .number("([NS]),(dd)(dd.d+),")       // latitude
+            .number("([EW]),(ddd)(dd.d+),")      // longitude
+            .number("(d+.?d*),")                 // speed
+            .number("(d+),")                     // course
+            .number("(x+),")                     // status
+            .any()
+            .compile();
+
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        Parser parser = new Parser(PATTERN, (String) msg);
+        if (!parser.matches()) {
+            return null;
+        }
+
+        DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, parser.next());
+        if (deviceSession == null) {
+            return null;
+        }
+
+        Position position = new Position(getProtocolName());
+        position.setDeviceId(deviceSession.getDeviceId());
+
+        position.set(Position.KEY_TYPE, parser.next());
+
+        position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS));
+
+        position.setValid(parser.next().equals("A"));
+        position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.HEM_DEG_MIN));
+        position.setSpeed(parser.nextDouble());
+        position.setCourse(parser.nextInt());
+
+        position.set(Position.KEY_STATUS, parser.next());
+
+        return position;
+    }
+
+}
-- 
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