From 865c6e3fdccc5b59b55501aa58fd921cdb8a1ec1 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Sat, 2 Jan 2016 09:24:45 +1300
Subject: Correct date if device sends not full time

---
 src/org/traccar/helper/DateUtil.java               | 55 ++++++++++++++++++++++
 src/org/traccar/protocol/TaipProtocolDecoder.java  | 13 +----
 .../traccar/protocol/TramigoProtocolDecoder.java   |  4 +-
 3 files changed, 60 insertions(+), 12 deletions(-)
 create mode 100644 src/org/traccar/helper/DateUtil.java

(limited to 'src')

diff --git a/src/org/traccar/helper/DateUtil.java b/src/org/traccar/helper/DateUtil.java
new file mode 100644
index 000000000..9d4148ac1
--- /dev/null
+++ b/src/org/traccar/helper/DateUtil.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2016 Anton Tananaev (anton.tananaev@gmail.com)
+ *
+ * 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.helper;
+
+import java.util.Calendar;
+import java.util.Date;
+
+public class DateUtil {
+
+    public static Date correctDay(Date guess) {
+        return correctDate(new Date(), guess, Calendar.DAY_OF_MONTH);
+    }
+
+    public static Date correctYear(Date guess) {
+        return correctDate(new Date(), guess, Calendar.YEAR);
+    }
+
+    public static Date correctDate(Date now, Date guess, int field) {
+
+        if (guess.getTime() > now.getTime()) {
+            Date previous = dateAdd(guess, field, -1);
+            if (now.getTime() - previous.getTime() < guess.getTime() - now.getTime()) {
+                return previous;
+            }
+        } else if (guess.getTime() < now.getTime()) {
+            Date next = dateAdd(guess, field, 1);
+            if (next.getTime() - now.getTime() < now.getTime() - guess.getTime()) {
+                return next;
+            }
+        }
+
+        return guess;
+    }
+
+    private static Date dateAdd(Date guess, int field, int amount) {
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTime(guess);
+        calendar.add(field, amount);
+        return calendar.getTime();
+    }
+
+}
diff --git a/src/org/traccar/protocol/TaipProtocolDecoder.java b/src/org/traccar/protocol/TaipProtocolDecoder.java
index 565d4a0c7..202b9dd63 100644
--- a/src/org/traccar/protocol/TaipProtocolDecoder.java
+++ b/src/org/traccar/protocol/TaipProtocolDecoder.java
@@ -21,6 +21,7 @@ import java.util.regex.Pattern;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
 import org.traccar.helper.DateBuilder;
+import org.traccar.helper.DateUtil;
 import org.traccar.helper.Parser;
 import org.traccar.helper.PatternBuilder;
 import org.traccar.helper.UnitsConverter;
@@ -68,17 +69,7 @@ public class TaipProtocolDecoder extends BaseProtocolDecoder {
         DateBuilder dateBuilder = new DateBuilder(new Date())
                 .setTime(0, 0, 0, 0)
                 .addMillis(seconds * 1000);
-
-        long millis = dateBuilder.getDate().getTime();
-        long diff = System.currentTimeMillis() - millis;
-
-        if (diff > 12 * 60 * 60 * 1000) {
-            millis += 24 * 60 * 60 * 1000;
-        } else if (diff < -12 * 60 * 60 * 1000) {
-            millis -= 24 * 60 * 60 * 1000;
-        }
-
-        return new Date(millis);
+        return DateUtil.correctDay(dateBuilder.getDate());
     }
 
     @Override
diff --git a/src/org/traccar/protocol/TramigoProtocolDecoder.java b/src/org/traccar/protocol/TramigoProtocolDecoder.java
index da34bcdfa..10bab3d6c 100644
--- a/src/org/traccar/protocol/TramigoProtocolDecoder.java
+++ b/src/org/traccar/protocol/TramigoProtocolDecoder.java
@@ -28,6 +28,7 @@ import org.jboss.netty.buffer.ChannelBuffer;
 import org.jboss.netty.buffer.ChannelBuffers;
 import org.jboss.netty.channel.Channel;
 import org.traccar.BaseProtocolDecoder;
+import org.traccar.helper.DateUtil;
 import org.traccar.helper.UnitsConverter;
 import org.traccar.model.Event;
 import org.traccar.model.Position;
@@ -126,7 +127,8 @@ public class TramigoProtocolDecoder extends BaseProtocolDecoder {
                 return null;
             }
             DateFormat dateFormat = new SimpleDateFormat("HH:mm MMM d yyyy", Locale.ENGLISH);
-            position.setTime(dateFormat.parse(matcher.group(1) + " " + Calendar.getInstance().get(Calendar.YEAR)));
+            position.setTime(DateUtil.correctYear(
+                    dateFormat.parse(matcher.group(1) + " " + Calendar.getInstance().get(Calendar.YEAR))));
 
             return position;
 
-- 
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