--- android/TrainInfoService/src/dk/thoerup/traininfoservice/RequestPlotter.java	2010/06/07 08:37:29	798
+++ android/TrainInfoService/src/dk/thoerup/traininfoservice/RequestPlotter.java	2010/06/07 18:26:09	805
@@ -5,6 +5,12 @@
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Map;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.zip.ZipEntry;
@@ -15,90 +21,187 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import dk.thoerup.traininfoservice.banedk.TimeoutMap;
+
 public class RequestPlotter extends HttpServlet {
 	private static final long serialVersionUID = 1L;
-	
+
 	static final Logger log = Logger.getLogger(RequestPlotter.class.getName());
-	
+
 	static final String KML = "application/vnd.google-earth.kml";
 	static final String KMZ = "application/vnd.google-earth.kmz";
 	
-	protected String getKml() {
-		StringBuilder sb = new StringBuilder();
+	Map<String,String> cache = new TimeoutMap<String,String>(2*60*1000);
+
+	class RequestPosition {
+		public String ip;
+		public Date time;
+		public String lat;
+		public String lng;
+	}
+
+
+
+	protected List<RequestPosition> getRequestsFromFile() throws IOException{
+		List<RequestPosition> positions = new ArrayList<RequestPosition>();
+
 		try {
 			FileInputStream fis = new FileInputStream("/var/log/apache2/app_access.log");
 			BufferedReader in = new BufferedReader( new InputStreamReader(fis) );
-			
-		
-			sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" );
-			sb.append( "<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n" );
-			sb.append( "<Document>\n" );
-			
+
+			SimpleDateFormat df = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss");
+
 			String line;
 			while ( (line=in.readLine()) != null) {
 				if (line.indexOf("LocateStation") == -1 ){
 					continue;
 				}
-				
+
 				if (line.indexOf("latitude") == -1 ) {
 					continue;
 				}
-				
+				RequestPosition pos = new RequestPosition();
+
 				String toks[] = line.split(" ");
-				String ip = toks[0];
-				String time = toks[3].replace("[", "");
+				pos.ip = toks[0];
+
+				pos.time = df.parse( toks[3].replace("[", "") );
+
 				String argpart = toks[6].split("\\?")[1];
 
-				
 				String args[] = argpart.split("&");
-				
-				String lat = args[0].split("=")[1];
-				String lng = args[1].split("=")[1];
-				
-		        sb.append( " <Placemark>\n" );
-		        sb.append( "  <description>IP=" + ip + "  Time=" + time + "</description>\n" );
-		        sb.append( "  <Point><coordinates>" + lng + "," + lat + ",0</coordinates></Point>\n" );
-		        sb.append( " </Placemark>\n" );
-				
+
+				pos.lat = args[0].split("=")[1];
+				pos.lng = args[1].split("=")[1];
+
+				positions.add(pos);
 			}
-			
-			sb.append(  "</Document>\n" );
-			sb.append( "</kml>\n" );
-			
-		} catch (Exception e) {
-			sb.append("<!-- error -->");
+		} catch (ParseException pe) {
+			log.log(Level.SEVERE, "parseException", pe);
+			throw new IOException(pe);
+		} catch (IOException e) {
 			log.log(Level.SEVERE, "getKml()", e);
+			throw e;
 		}
+
+		return positions;
+	}
+
+	protected String formatXml(List<RequestPosition> list) {
+		StringBuilder sb = new StringBuilder();
+
+		sb.append( "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" );
+		sb.append( "<kml xmlns=\"http://www.opengis.net/kml/2.2\">\n" );
+		sb.append( "<Document>\n" );		
+		
+		
+		sb.append( " <Style id=\"red\">\n" );
+		sb.append( "  <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/red-circle.png</href></Icon></IconStyle>\n" );
+		sb.append( " </Style>\n");
+
+		sb.append( " <Style id=\"yellow\">\n" );
+		sb.append( "  <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/ylw-circle.png</href></Icon></IconStyle>\n" );
+		sb.append( " </Style>\n" );
+
+		sb.append( " <Style id=\"green\">\n" );
+		sb.append( "  <IconStyle><Icon><href>http://maps.google.com/mapfiles/kml/paddle/grn-circle.png</href></Icon></IconStyle>\n" );
+		sb.append( " </Style>\n\n" );
 		
-		return sb.toString();
+/*
+		String overlay = 
+	      " <ScreenOverlay>" +
+	        " <name>Absolute Positioning: Top left</name>" +
+	        " <description>Absolute Positioning: Top left</description>" +
+	        " <visibility>1</visibility>" +
+	        "  <Icon>" +
+	        "   <href>http://code.google.com/apis/kml/documentation/top_left.jpg</href>" +
+	        "  </Icon>" +
+	        "  <overlayXY x=\"0\" y=\"1\" xunits=\"fraction\" yunits=\"fraction\"/>" +
+	        "  <screenXY x=\"0\" y=\"1\" xunits=\"fraction\" yunits=\"fraction\"/>" +
+	        "  <rotationXY x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/>" +
+	        "  <size x=\"0\" y=\"0\" xunits=\"fraction\" yunits=\"fraction\"/>" +
+	      " </ScreenOverlay>" ;
+		
+		sb.append(overlay);
+	*/	
+		
+
+		final String STYLE_GREEN = "green";
+		final String STYLE_YELLOW = "yellow";
+		final String STYLE_RED = "red";
+
+		String oldstyle = null;
+		Date now = new Date();
+		for(RequestPosition current : list) {
+			
+			String style;
+			long timediff = now.getTime() - current.time.getTime();
+			
+			if ( timediff < (3*60*60*1000) ) {
+				style = STYLE_RED;
+			} else if ( timediff < (24*60*60*1000)) {
+				style = STYLE_YELLOW;
+			} else {
+				style = STYLE_GREEN;
+			}
+			
+			if (  !style.equals(oldstyle) ) {
+				if (oldstyle != null) 				
+					sb.append( "</Folder>\n");
+				sb.append( "<Folder>\n");
+				sb.append( " <name>" ).append(style).append("</name>\n");
+				
+				oldstyle = style;
+			}
+			
+			sb.append( " <Placemark>\n" );
+			sb.append( "  <styleUrl>#" + style + "</styleUrl>\n" );
+			sb.append( "  <description>IP=" + current.ip + "  Time=" + current.time + "</description>\n" );
+			sb.append( "  <Point><coordinates>" + current.lng + "," + current.lat + ",0</coordinates></Point>\n" );
+			sb.append( " </Placemark>\n" );			
+		}
+		sb.append( "</Folder>\n" );
+		sb.append( "</Document>\n" );
+		sb.append( "</kml>\n" );
+
+		return sb.toString(); 
 	}
 
 	@Override
 	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-		String data = getKml();
+		final String KEY = "kmldata";
+		
+		String kmlData = cache.get(KEY);
 		
+		if (kmlData == null) {
+			kmlData = formatXml( getRequestsFromFile() );
+			cache.put(KEY, kmlData);
+			kmlData += "<!-- from source -->";			
+		} else {
+			kmlData += "<!-- cached -->";
+		}
+
+		
+
 		if (req.getParameter("zip") != null) {
-			
+
 			ByteArrayOutputStream baos = new ByteArrayOutputStream();
-			
+
 			ZipOutputStream zip = new ZipOutputStream(baos);
 			zip.putNextEntry( new ZipEntry("trains.kml") );
-			zip.write( data.getBytes() );
+			zip.write( kmlData.getBytes() );
 			zip.closeEntry();
 			zip.close();
-						
+
 			byte bytes[] = baos.toByteArray();
-			
+
 			resp.setContentType(KMZ);
 			resp.setContentLength( bytes.length );
 			resp.getOutputStream().write(bytes);
-			
+
 		} else {
 			resp.setContentType(KML);
-			resp.getWriter().print( getKml() );
+			resp.getWriter().print( kmlData );
 		}
 	}
-	
-	
-
 }