From 0be665378d1f23ff5026a2b3110972e1108d7034 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sun, 24 Feb 2019 14:24:37 -0800
Subject: Support Fifotrack photos

---
 src/org/traccar/helper/PatternBuilder.java         |  2 +-
 .../traccar/protocol/FifotrackProtocolDecoder.java | 83 ++++++++++++++++++++--
 2 files changed, 79 insertions(+), 6 deletions(-)

(limited to 'src')

diff --git a/src/org/traccar/helper/PatternBuilder.java b/src/org/traccar/helper/PatternBuilder.java
index f3de5c1e5..5c4638189 100644
--- a/src/org/traccar/helper/PatternBuilder.java
+++ b/src/org/traccar/helper/PatternBuilder.java
@@ -56,7 +56,7 @@ public class PatternBuilder {
     }
 
     public PatternBuilder any() {
-        fragments.add(".*?");
+        fragments.add(".*");
         return this;
     }
 
diff --git a/src/org/traccar/protocol/FifotrackProtocolDecoder.java b/src/org/traccar/protocol/FifotrackProtocolDecoder.java
index 4412df86b..5831a75dd 100644
--- a/src/org/traccar/protocol/FifotrackProtocolDecoder.java
+++ b/src/org/traccar/protocol/FifotrackProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 - 2018 Anton Tananaev (anton@traccar.org)
+ * Copyright 2016 - 2019 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.
@@ -15,10 +15,15 @@
  */
 package org.traccar.protocol;
 
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.Unpooled;
 import io.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.DeviceSession;
+import org.traccar.NetworkMessage;
 import org.traccar.Protocol;
+import org.traccar.helper.Checksum;
+import org.traccar.helper.DataConverter;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.helper.UnitsConverter;
@@ -31,6 +36,8 @@ import java.util.regex.Pattern;
 
 public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
 
+    private ByteBuf photo;
+
     public FifotrackProtocolDecoder(Protocol protocol) {
         super(protocol);
     }
@@ -65,11 +72,43 @@ public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
             .any()
             .compile();
 
-    @Override
-    protected Object decode(
-            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+    private static final Pattern PATTERN_PHOTO = new PatternBuilder()
+            .text("$$")
+            .number("d+,")                       // length
+            .number("(d+),")                     // imei
+            .any()
+            .number("(d+),")                     // length
+            .expression("([^*]+)")               // photo id
+            .text("*")
+            .number("xx")
+            .compile();
+
+    private static final Pattern PATTERN_PHOTO_DATA = new PatternBuilder()
+            .text("$$")
+            .number("d+,")                       // length
+            .number("(d+),")                     // imei
+            .expression("([^*]+)")               // photo id
+            .number("(d+),")                     // offset
+            .number("(d+),")                     // size
+            .number("(x+)")                      // data
+            .text("*")
+            .number("xx")
+            .compile();
 
-        Parser parser = new Parser(PATTERN, (String) msg);
+    private void requestPhoto(Channel channel, SocketAddress socketAddress, String imei, String file) {
+        if (channel != null) {
+            String content = "D06," + file + "," + photo.writerIndex() + "," + Math.min(1024, photo.writableBytes());
+            int length = 1 + imei.length() + 1 + content.length() + 5;
+            String response = String.format("@@%02d,%s,%s*", length, imei, content);
+            response += Checksum.sum(response) + "\r\n";
+            channel.writeAndFlush(new NetworkMessage(response, socketAddress));
+        }
+    }
+
+    private Object decodeLocation(
+            Channel channel, SocketAddress remoteAddress, String sentence) {
+
+        Parser parser = new Parser(PATTERN, sentence);
         if (!parser.matches()) {
             return null;
         }
@@ -122,4 +161,38 @@ public class FifotrackProtocolDecoder extends BaseProtocolDecoder {
         return position;
     }
 
+    @Override
+    protected Object decode(
+            Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
+
+        String sentence = (String) msg;
+        int typeIndex = sentence.indexOf(',', sentence.indexOf(',', sentence.indexOf(',') + 1) + 1) + 1;
+        String type = sentence.substring(typeIndex, typeIndex + 3);
+
+        if (type.equals("D05")) {
+            Parser parser = new Parser(PATTERN_PHOTO, sentence);
+            if (parser.matches()) {
+                String imei = parser.next();
+                int length = parser.nextInt();
+                String photoId = parser.next();
+                photo = Unpooled.buffer(length);
+                requestPhoto(channel, remoteAddress, imei, photoId);
+            }
+        } else if (type.equals("D06")) {
+            Parser parser = new Parser(PATTERN_PHOTO_DATA, sentence);
+            if (parser.matches()) {
+                String imei = parser.next();
+                String photoId = parser.next();
+                parser.nextInt(); // offset
+                parser.nextInt(); // size
+                photo.writeBytes(DataConverter.parseHex(parser.next()));
+                requestPhoto(channel, remoteAddress, imei, photoId);
+            }
+        } else {
+            return decodeLocation(channel, remoteAddress, sentence);
+        }
+
+        return null;
+    }
+
 }
-- 
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