From 267c6e1651b6e0e91dd7c3463f86de929d7bc73c Mon Sep 17 00:00:00 2001
From: Abyss777 <abyss@fox5.ru>
Date: Fri, 9 Feb 2018 12:11:39 +0500
Subject: Implement unified device timezone handling

---
 src/org/traccar/protocol/Gt06ProtocolDecoder.java | 45 ++++++++++++++---------
 1 file changed, 27 insertions(+), 18 deletions(-)

(limited to 'src/org/traccar/protocol/Gt06ProtocolDecoder.java')

diff --git a/src/org/traccar/protocol/Gt06ProtocolDecoder.java b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
index 4173b4d5b..3e5ebc8c5 100644
--- a/src/org/traccar/protocol/Gt06ProtocolDecoder.java
+++ b/src/org/traccar/protocol/Gt06ProtocolDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012 - 2017 Anton Tananaev (anton@traccar.org)
+ * Copyright 2012 - 2018 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.
@@ -44,18 +44,10 @@ import java.util.regex.Pattern;
 
 public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
-    private boolean forceTimeZone = false;
-    private final TimeZone timeZone = TimeZone.getTimeZone("UTC");
-
     private final Map<Integer, ChannelBuffer> photos = new HashMap<>();
 
     public Gt06ProtocolDecoder(Gt06Protocol protocol) {
         super(protocol);
-
-        if (Context.getConfig().hasKey(getProtocolName() + ".timezone")) {
-            forceTimeZone = true;
-            timeZone.setRawOffset(Context.getConfig().getInteger(getProtocolName() + ".timezone") * 1000);
-        }
     }
 
     public static final int MSG_LOGIN = 0x01;
@@ -202,9 +194,9 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
         sendResponse(channel, false, MSG_X1_PHOTO_DATA, 0, content);
     }
 
-    private boolean decodeGps(Position position, ChannelBuffer buf, boolean hasLength) {
+    private boolean decodeGps(Position position, ChannelBuffer buf, boolean hasLength, TimeZone timezone) {
 
-        DateBuilder dateBuilder = new DateBuilder(timeZone)
+        DateBuilder dateBuilder = new DateBuilder(timezone)
                 .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
                 .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
         position.setTime(dateBuilder.getDate());
@@ -387,6 +379,9 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             if (deviceSession == null) {
                 return null;
             }
+            if (deviceSession.getTimeZone() == null) {
+                deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+            }
         }
 
         if (type == MSG_LOGIN) {
@@ -394,6 +389,11 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             String imei = ChannelBuffers.hexDump(buf.readBytes(8)).substring(1);
             buf.readUnsignedShort(); // type
 
+            deviceSession = getDeviceSession(channel, remoteAddress, imei);
+            if (deviceSession != null && deviceSession.getTimeZone() == null) {
+                deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+            }
+
             if (dataLength > 10) {
                 int extensionBits = buf.readUnsignedShort();
                 int hours = (extensionBits >> 4) / 100;
@@ -402,12 +402,17 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
                 if ((extensionBits & 0x8) != 0) {
                     offset = -offset;
                 }
-                if (!forceTimeZone) {
-                    timeZone.setRawOffset(offset * 1000);
+                if (deviceSession != null) {
+                    TimeZone timeZone = deviceSession.getTimeZone();
+                    if (timeZone.getRawOffset() == 0) {
+                        timeZone.setRawOffset(offset * 1000);
+                        deviceSession.setTimeZone(timeZone);
+                    }
                 }
+
             }
 
-            if (getDeviceSession(channel, remoteAddress, imei) != null) {
+            if (deviceSession != null) {
                 sendResponse(channel, false, type, buf.getShort(buf.writerIndex() - 6), null);
             }
 
@@ -455,7 +460,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             buf.readUnsignedInt(); // data and alarm
 
-            decodeGps(position, buf, false);
+            decodeGps(position, buf, false, deviceSession.getTimeZone());
 
             buf.readUnsignedShort(); // terminal info
 
@@ -543,7 +548,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
             boolean longFormat = type == MSG_LBS_2 || type == MSG_WIFI_3;
 
-            DateBuilder dateBuilder = new DateBuilder(timeZone)
+            DateBuilder dateBuilder = new DateBuilder(deviceSession.getTimeZone())
                     .setDate(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte())
                     .setTime(buf.readUnsignedByte(), buf.readUnsignedByte(), buf.readUnsignedByte());
 
@@ -589,7 +594,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
         } else if (isSupported(type)) {
 
             if (hasGps(type)) {
-                decodeGps(position, buf, false);
+                decodeGps(position, buf, false, deviceSession.getTimeZone());
             } else {
                 getLastLocation(position, null);
             }
@@ -642,6 +647,10 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
             return null;
         }
 
+        if (deviceSession.getTimeZone() == null) {
+            deviceSession.setTimeZone(getTimeZone(deviceSession.getDeviceId()));
+        }
+
         Position position = new Position(getProtocolName());
         position.setDeviceId(deviceSession.getDeviceId());
 
@@ -711,7 +720,7 @@ public class Gt06ProtocolDecoder extends BaseProtocolDecoder {
 
         } else if (type == MSG_AZ735_GPS || type == MSG_AZ735_ALARM) {
 
-            if (!decodeGps(position, buf, true)) {
+            if (!decodeGps(position, buf, true, deviceSession.getTimeZone())) {
                 getLastLocation(position, position.getDeviceTime());
             }
 
-- 
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