Refactor M-5000/10000 decoding

2 files changed, 48 insertions, 203 deletions

diff --git a/src/main/java/org/traccar/helper/NMEA.java b/src/main/java/org/traccar/helper/NMEA.java
deleted file mode 100644
index cae47a8f6..000000000
--- a/src/main/java/org/traccar/helper/NMEA.java
+++ /dev/null
@@ -1,126 +0,0 @@
-package org.traccar.helper;
-
-import java.util.HashMap;
-import java.util.Map;
-
-
-public class NMEA {
-
-    // fucking java interfaces
-    interface SentenceParser {
-        public boolean parse(String[] tokens, GPSPosition position);
-    }
-
-    // utils
-    static float Latitude2Decimal(String lat, String NS) {
-        float med = Float.parseFloat(lat.substring(2)) / 60.0f;
-        med += Float.parseFloat(lat.substring(0, 2));
-        if (NS.startsWith("S")) {
-            med = -med;
-        }
-        return med;
-    }
-
-    static float Longitude2Decimal(String lon, String WE) {
-        float med = Float.parseFloat(lon.substring(3)) / 60.0f;
-        med += Float.parseFloat(lon.substring(0, 3));
-        if (WE.startsWith("W")) {
-            med = -med;
-        }
-        return med;
-    }
-
-    // parsers
-    class GPGGA implements SentenceParser {
-        public boolean parse(String[] tokens, GPSPosition position) {
-            position.time = Float.parseFloat(tokens[1]);
-            position.lat = Latitude2Decimal(tokens[2], tokens[3]);
-            position.lon = Longitude2Decimal(tokens[4], tokens[5]);
-            position.quality = Integer.parseInt(tokens[6]);
-            position.altitude = Float.parseFloat(tokens[9]);
-            return true;
-        }
-    }
-
-    class GPGGL implements SentenceParser {
-        public boolean parse(String[] tokens, GPSPosition position) {
-            position.lat = Latitude2Decimal(tokens[1], tokens[2]);
-            position.lon = Longitude2Decimal(tokens[3], tokens[4]);
-            position.time = Float.parseFloat(tokens[5]);
-            return true;
-        }
-    }
-
-    class GPRMC implements SentenceParser {
-        public boolean parse(String[] tokens, GPSPosition position) {
-            position.time = Float.parseFloat(tokens[1]);
-            position.lat = Latitude2Decimal(tokens[3], tokens[4]);
-            position.lon = Longitude2Decimal(tokens[5], tokens[6]);
-            position.velocity = Float.parseFloat(tokens[7]);
-            position.dir = Float.parseFloat(tokens[8]);
-            return true;
-        }
-    }
-
-    class GPVTG implements SentenceParser {
-        public boolean parse(String[] tokens, GPSPosition position) {
-            position.dir = Float.parseFloat(tokens[3]);
-            return true;
-        }
-    }
-
-    class GPRMZ implements SentenceParser {
-        public boolean parse(String[] tokens, GPSPosition position) {
-            position.altitude = Float.parseFloat(tokens[1]);
-            return true;
-        }
-    }
-
-    public class GPSPosition {
-        public float time = 0.0f;
-        public float lat = 0.0f;
-        public float lon = 0.0f;
-        public boolean fixed = false;
-        public int quality = 0;
-        public float dir = 0.0f;
-        public float altitude = 0.0f;
-        public float velocity = 0.0f;
-
-        public void updatefix() {
-            fixed = quality > 0;
-        }
-
-        public String toString() {
-            return String.format("POSITION: lat: %f, lon: %f, time: %f, Q: %d, dir: %f, alt: %f, vel: %f", lat, lon, time, quality, dir, altitude, velocity);
-        }
-    }
-
-    GPSPosition position = new GPSPosition();
-
-    private static final Map<String, SentenceParser> sentenceParsers = new HashMap<String, SentenceParser>();
-
-    public NMEA() {
-        sentenceParsers.put("GPGGA", new GPGGA());
-        sentenceParsers.put("GPGGL", new GPGGL());
-        sentenceParsers.put("GPRMC", new GPRMC());
-        sentenceParsers.put("GPRMZ", new GPRMZ());
-        //only really good GPS devices have this sentence but ...
-        sentenceParsers.put("GPVTG", new GPVTG());
-    }
-
-    public GPSPosition parse(String line) {
-
-        if (line.startsWith("$")) {
-            String nmea = line.substring(1);
-            String[] tokens = nmea.split(",");
-            String type = tokens[0];
-            //TODO check crc
-            if (sentenceParsers.containsKey(type)) {
-                sentenceParsers.get(type).parse(tokens, position);
-            }
-            position.updatefix();
-        }
-
-        return position;
-    }
-}
diff --git a/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java b/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java
index 6ca9b0795..34c879cb8 100644
--- a/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java
+++ b/src/main/java/org/traccar/protocol/PiligrimProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2014 - 2020 Anton Tananaev (anton@traccar.org)
+ * Copyright 2014 - 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.
@@ -21,27 +21,23 @@ import io.netty.channel.Channel;
 import io.netty.handler.codec.http.FullHttpRequest;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import io.netty.handler.codec.http.QueryStringDecoder;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.traccar.BaseHttpProtocolDecoder;
-import org.traccar.WebDataHandler;
-import org.traccar.session.DeviceSession;
 import org.traccar.Protocol;
 import org.traccar.helper.BitUtil;
 import org.traccar.helper.DateBuilder;
-import org.traccar.helper.NMEA;
+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.nio.charset.StandardCharsets;
-import java.util.Date;
 import java.util.LinkedList;
 import java.util.List;
+import java.util.regex.Pattern;
 
 public class PiligrimProtocolDecoder extends BaseHttpProtocolDecoder {
 
-    private static final Logger LOGGER = LoggerFactory.getLogger(WebDataHandler.class);
-
     public PiligrimProtocolDecoder(Protocol protocol) {
         super(protocol);
     }
@@ -54,6 +50,21 @@ public class PiligrimProtocolDecoder extends BaseHttpProtocolDecoder {
     public static final int MSG_GPS_SENSORS = 0xF2;
     public static final int MSG_EVENTS = 0xF3;
 
+    private static final Pattern PATTERN = new PatternBuilder()
+            .expression("[^$]+")
+            .text("$GPRMC,")
+            .number("(dd)(dd)(dd).d+,")          // time (hhmmss)
+            .expression("([AV]),")               // validity
+            .number("(dd)(dd.d+),")              // latitude
+            .expression("([NS]),")
+            .number("(d{2,3})(dd.d+),")          // longitude
+            .expression("([EW]),")
+            .number("(d+.d+),")                  // speed
+            .number("(d+.d+),")                  // course
+            .number("(dd)(dd)(dd),")             // date (ddmmyy)
+            .any()
+            .compile();
+
     @Override
     protected Object decode(
             Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
@@ -157,82 +168,42 @@ public class PiligrimProtocolDecoder extends BaseHttpProtocolDecoder {
             }
 
             return positions;
+
         } else if (uri.startsWith("/push.do")) {
+
             sendResponse(channel, "PUSH.DO: OK");
 
-            /* Getting payload */
-            ByteBuf contentStream = request.content();
-            byte[] payloadBytes = new byte[Integer.parseInt(request.headers().get("Content-Length"))];
-            contentStream.readBytes(payloadBytes);
-            String payload = new String(payloadBytes);
-
-            /* Payload structure:
-             * &phone&message
-             */
-            String[] payloadParts = payload.split("&");
-            /* LOGGER.debug("Payload parts: " + Arrays.toString(payloadParts)); */
-            String phoneNumber = payloadParts[1].substring(15);
-            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, phoneNumber.substring(1));
+            String sentence = request.content().toString(StandardCharsets.US_ASCII);
+
+            String[] parts = sentence.split("&");
+            String phone = parts[1].substring(16);
+            DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, phone);
             if (deviceSession == null) {
                 return null;
             }
 
-            /* TODO: use keys for flags in 'positions'. */
-            String message = payloadParts[2].substring(8).replaceFirst("[a-zA-Z! ]*; ", "");
-            /* LOGGER.debug("Phone number: " + phoneNumber); */
-            /* LOGGER.debug("Message: " + message); */
-
-            if (message.startsWith("$GPRMC")) {
-                /* Supported message structure:
-                 * GPS NMEA Command; GSM info; Unknown; Battery voltage?
-                 * Example: $GPRMC,180752.000,A,5314.0857,N,03421.8173,E,0.00,104.74,220722,,,A,V* 29,05; GSM: 250-01 0b54-0519,1c30,3e96,3ebe,412e 25;  S; Batt: 405,M
-                 */
-                LOGGER.debug("Supported message");
-
-                String[] messageParts = message.split(";");
-                /* LOGGER.debug("Message parts: " + Arrays.toString(messageParts)); */
-
-                /* Parsing GPS */
-                String unprocessedGpsCommand = messageParts[0];
-
-                /* Getting rid of checksum */
-                String gpsCommand = unprocessedGpsCommand.replaceFirst("A,V[*].*", "");
-                /* LOGGER.debug("GPS command: " + gpsCommand); */
-
-                NMEA gpsParser = new NMEA();
-
-                NMEA.GPSPosition gpsPosition = gpsParser.parse(gpsCommand);
-
-                /* LOGGER.debug("Time: " + gpsPosition.time); */
-                /* LOGGER.debug("Coordinates: " + gpsPosition.lat + " " + gpsPosition.lon); */
-                /* LOGGER.debug("Speed over ground: " + gpsPosition.velocity + " knots"); */
-
-                /* Parsing other fields */
-                /* String gsmInfo = messageParts[1]; */
-                /* String unknown = messageParts[2]; */
-                String batteryInfo = messageParts[messageParts.length - 1].substring(7).substring(0, 3);
-                /* LOGGER.debug("Battery: " + batteryInfo); */
-
-                /* Constructing response */
-                Position position = new Position(getProtocolName());
-
-                position.setDeviceId(deviceSession.getDeviceId());
-                position.setValid(true);
-                position.setLatitude(gpsPosition.lat);
-                position.setLongitude(gpsPosition.lon);
-                position.setTime(new Date(System.currentTimeMillis()));
-                position.setSpeed(gpsPosition.velocity);
-                position.setCourse(gpsPosition.dir);
-                position.setAccuracy(gpsPosition.quality);
-                position.setAltitude(gpsPosition.altitude);
-                position.set(Position.KEY_BATTERY, Integer.parseInt(batteryInfo) / 100);
-
-                LOGGER.debug("Supported message finish");
-
-                return position;
-            } else {
-                LOGGER.error("Unsupported message");
+            Parser parser = new Parser(PATTERN, parts[2]);
+            if (!parser.matches()) {
+                return null;
             }
+
+            Position position = new Position(getProtocolName());
+            position.setDeviceId(deviceSession.getDeviceId());
+
+            DateBuilder dateBuilder = new DateBuilder()
+                    .setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
+
+            position.setValid(parser.next().equals("A"));
+            position.setLatitude(parser.nextCoordinate());
+            position.setLongitude(parser.nextCoordinate());
+            position.setSpeed(parser.nextDouble());
+            position.setCourse(parser.nextDouble());
+
+            dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
+            position.setTime(dateBuilder.getDate());
+
+            return position;
+
         }
 
         return null;