P25 work in progress - final commit of TSBK message parsers

src/decode/p25/message/tsbk/osp/control/TimeAndDateAnnouncement.java

@@ -0,0 +1,155 @@
+package decode.p25.message.tsbk.osp.control;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.TimeZone;
+
+import alias.AliasList;
+import bits.BitSetBuffer;
+import decode.p25.message.tsbk.TSBKMessage;
+import decode.p25.reference.DataUnitID;
+import decode.p25.reference.Opcode;
+
+public class TimeAndDateAnnouncement extends TSBKMessage
+{
+	public static final int VALID_DATE_INDICATOR = 80;
+	public static final int VALID_TIME_INDICATOR = 81;
+	public static final int VALID_LOCAL_TIME_OFFSET_INDICATOR = 82;
+
+	public static final int LOCAL_TIME_OFFSET_SIGN = 84;
+    public static final int[] LOCAL_TIME_OFFSET = { 85,86,87,88,89,90,91,92,
+    	93,94,95 };
+    public static final int[] MONTH = { 96,97,98,99 };
+    public static final int[] DAY = { 100,101,102,103 };
+    public static final int[] YEAR = { 105,106,107,108,109,110,111,112,113,114,
+    	115,116,117 };
+    public static final int[] HOURS = { 120,121,122,123,124 };
+    public static final int[] MINUTES = { 125,126,127,128,129,130 };
+    public static final int[] SECONDS = { 131,132,133,134,135,136 };
+    
+    private SimpleDateFormat mTimeFormatter = 
+    		new SimpleDateFormat( "EEE, d MMM yyyy HH:mm:ss Z" );
+
+	public TimeAndDateAnnouncement( BitSetBuffer message, DataUnitID duid,
+								AliasList aliasList )
+    {
+	    super( message, duid, aliasList );
+    }
+
+    @Override
+    public String getEventType()
+    {
+        return Opcode.TIME_DATE_ANNOUNCEMENT.getDescription();
+    }
+    
+    public String getMessage()
+    {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append( getMessageStub() );
+
+        if( hasValidDate() )
+        {
+        	sb.append( " DATE-TIME:" );
+        }
+        
+        sb.append( mTimeFormatter.format( new Date( getDateTimestamp() ) ) );
+        
+        return sb.toString();
+    }
+    
+    public long getDateTimestamp()
+    {
+    	Calendar cal = new GregorianCalendar( getTimeZone() );
+
+    	if( hasValidDate() )
+    	{
+        	cal.set( Calendar.YEAR, getYear() );
+        	cal.set( Calendar.MONTH, getMonth() );
+        	cal.set( Calendar.DAY_OF_MONTH, getDay() );
+    	}
+    	
+    	if( hasValidTime() )
+    	{
+    		cal.set( Calendar.HOUR, getHour() );
+    		cal.set( Calendar.MINUTE, getMinute() );
+    		cal.set( Calendar.SECOND, getSecond() );
+    	}
+    	
+    	return cal.getTimeInMillis();
+    }
+    
+    public boolean hasValidDate()
+	{
+		return mMessage.get( VALID_DATE_INDICATOR );
+	}
+	
+	public boolean hasValidTime()
+	{
+		return mMessage.get( VALID_TIME_INDICATOR );
+	}
+
+	public TimeZone getTimeZone()
+	{
+		StringBuilder sb = new StringBuilder();
+		
+		sb.append( "GMT " );
+		
+		sb.append( mMessage.get( LOCAL_TIME_OFFSET_SIGN ) ? "-" : "+" );
+
+		int offsetMinutes = getLocalTimeOffset();
+		
+		sb.append( (int)( offsetMinutes / 60 )  );
+		
+		sb.append( " : " );
+		
+		sb.append( offsetMinutes % 60 );
+		
+		return TimeZone.getTimeZone( sb.toString() );
+	}
+	
+	public boolean hasValidLocalTimeOffset()
+	{
+		return mMessage.get( VALID_LOCAL_TIME_OFFSET_INDICATOR );
+	}
+
+	/**
+	 * Local Time Offset in minutes
+	 */
+	public int getLocalTimeOffset()
+	{
+		return mMessage.getInt( LOCAL_TIME_OFFSET );
+	}
+
+	public int getMonth()
+	{
+		return mMessage.getInt( MONTH );
+	}
+	
+	public int getDay()
+	{
+		return mMessage.getInt( DAY );
+	}
+	
+	public int getYear()
+	{
+		return mMessage.getInt( YEAR );
+	}
+	
+	public int getHour()
+	{
+		return mMessage.getInt( HOURS );
+	}
+	
+	public int getMinute()
+	{
+		return mMessage.getInt( MINUTES );
+	}
+	
+	public int getSecond()
+	{
+		return mMessage.getInt( SECONDS );
+	}
+}