prod/net/jaekl/frank/Schedule.java

   1 package net.jaekl.frank;
   2
   3 import java.io.PrintWriter;
   4 import java.text.DateFormat;
   5 import java.text.MessageFormat;
   6 import java.text.SimpleDateFormat;
   7 import java.util.Date;
   8 import java.util.Locale;
   9 import java.util.TimeZone;
  10
  11 import net.jaekl.frank.octranspo.Route;
  12 import net.jaekl.frank.octranspo.StopInfo;
  13 import net.jaekl.frank.octranspo.Trip;
  14
  15 public class Schedule {
  16         DateFormat m_hourMinFmt;
  17         DateFormat m_hourMinSecFmt;
  18         FrankBundle m_bundle;
  19         Locale m_locale;
  20         Style m_style;
  21
  22         public Schedule(Locale locale) {
  23                 m_locale = locale;
  24                 m_style = new Style();
  25                 m_bundle = FrankBundle.getInst(locale);
  26                 m_hourMinFmt = new SimpleDateFormat("hh:mma", locale);
  27                 m_hourMinSecFmt = new SimpleDateFormat("hh:mm:ssa", locale);
  28
  29                 // We always display times in Ottawa (local) time, because that's the only
  30                 // time that makes sense for a user who wants to know when to catch a bus.
  31                 // In the (unlikely?) event that our server is in a different timezone,
  32                 // we need to explicitly specify the time zone that we want to use.
  33                 TimeZone tz = TimeZone.getTimeZone("America/Toronto");
  34                 m_hourMinFmt.setTimeZone(tz);
  35                 m_hourMinSecFmt.setTimeZone(tz);
  36         }
  37
  38         String trans(String key) {
  39                 return m_bundle.get(key);
  40         }
  41
  42         String mapUrl(double latitude, double longitude) {
  43                 return "http://www.openstreetmap.org/?mlat=" + latitude + "&mlon=" + longitude + "&zoom=15";
  44         }
  45
  46         // Countdown timer that updates time remaining until each bus is expected.
  47         void writeScript(PrintWriter pw, String remainArray, int remainCount) {
  48                 String min = trans(FrankBundle.MINUTES);
  49                 String sec = trans(FrankBundle.SECONDS);
  50
  51                 pw.println("<SCRIPT>");
  52             pw.println("var start; var interval; var remain;");
  53             pw.println("window.onload = function() { start = new Date(); interval = setInterval(\"Tick()\", 1000); remain = " + remainArray + "; }");
  54             pw.println("function Tick() { ");
  55             pw.println("  var now = new Date(); var delta = Math.floor((now.getTime() - start.getTime()) / 1000); ");
  56             pw.println("  var secs = delta % 60; var mins = Math.floor(delta / 60);");
  57             pw.println("  document.getElementById(\"elapsed\").innerHTML = mins + \"" + min + " \" + secs + \"" + sec + "\";");
  58             pw.println("  for (var i = 0; i < " + remainCount + "; ++i) {");
  59             pw.println("    var id = \"in_\" + i;");
  60             pw.println("    var element = document.getElementById(id);");
  61             pw.println("    var remain_delta = (remain[i] * 60) + 30 - delta;");
  62             pw.println("    if (remain_delta <= 0) {");
  63             pw.println("      element.innerHTML = \"----\";");
  64             pw.println("    } else {");
  65             pw.println("      element.innerHTML = (Math.floor(remain_delta / 60)) + \"" + min + "\";");
  66             pw.println("    }");
  67             pw.println("  }");
  68             pw.println("}");
  69             pw.println("</SCRIPT>");
  70
  71         }
  72
  73         void writeHeader(PrintWriter pw, String title) {
  74                 pw.println("<HTML>");
  75                 pw.println("<HEAD>");
  76                 pw.println("  <META NAME=\"viewport\" content=\"width=device-width\"/>");
  77                 pw.println("  <TITLE>" + title + "</TITLE>");
  78                 new Style().writeStyle(pw);
  79                 pw.println("</HEAD>");
  80         }
  81
  82         void writePage(PrintWriter pw, StopInfo stopInfo)
  83         {
  84                 StringBuilder remainArray = new StringBuilder("[ ");
  85                 int           remainCount = 0;
  86
  87                 String title = stopInfo.getDescr() + " (" + stopInfo.getStopNo() + ")";
  88                 String min = trans(FrankBundle.MINUTES);
  89
  90                 writeHeader(pw, trans(FrankBundle.FRANK) + ": " + title);
  91
  92                 pw.println("<BODY>");
  93                 pw.println("  <TABLE ID=\"trips\">");
  94                 pw.println("    <TR><TH COLSPAN=\"5\">" + title + "</TH></TR>");
  95                 pw.println("    <TR><TH>" +
  96                         trans(FrankBundle.ROUTE) +
  97                                 "</TH><TH>" +
  98                                 trans(FrankBundle.DESTINATION) +
  99                                 "</TH><TH>" +
 100                                 trans(FrankBundle.ETA) +
 101                                 "</TH><TH>" +
 102                                 trans(FrankBundle.REMAIN) +
 103                                 "</TH><TH>" +
 104                                 trans(FrankBundle.GPS_READ) +
 105                                 "</TH>");
 106
 107                 for (int routeIdx = 0; routeIdx < stopInfo.getNumRoutes(); ++routeIdx) {
 108                         Route route = stopInfo.getRoute(routeIdx);
 109                         for (int tripIdx = 0; tripIdx < route.getNumTrips(); ++tripIdx) {
 110                                 Trip trip = route.getTrip(tripIdx);
 111                                 boolean isGhost = (trip.getAdjAge() < 0);
 112                                 if (isGhost) {
 113                                         // GPS is off.  This bus may not exist.
 114                                         pw.println("    <TR CLASS=\"ghost\">");
 115                                 } else {
 116                                         pw.println("    <TR>");
 117                                 }
 118                                 pw.println("      <TD>" + route.getRouteNo() + "</TD>");
 119                                 pw.println("      <TD>" + trip.getDest() + "</TD>");
 120                                 pw.println("      <TD>" + m_hourMinFmt.format(trip.getETA()) + "</TD>");
 121
 122                                 pw.println("      <TD><SPAN ID=\"in_" + remainCount + "\">"+ trip.getAdjTime()+min+"</SPAN></TD>");
 123                                 if (remainCount > 0) {
 124                                         remainArray.append(", ");
 125                                 }
 126                                 remainArray.append(trip.getAdjTime());
 127                                 remainCount++;
 128
 129                                 if (isGhost) {
 130                                         pw.println("      <TD>" + trans(FrankBundle.GPS_OFF) + "</TD>");
 131                                 }
 132                                 else {
 133                                         pw.println("      <TD><A HREF=\"" + mapUrl(trip.getLatitude(), trip.getLongitude()) +
 134                                                            "\">" + m_hourMinSecFmt.format(trip.getGPSTime()) + "</A></TD>");
 135                                 }
 136                                 pw.println("    </TR>");
 137                         }
 138                 }
 139
 140                 pw.println("  </TABLE>");
 141
 142                 String dataCollectedFormat = trans(FrankBundle.DATA_COLLECTED);
 143                 String dataCollected = MessageFormat.format(dataCollectedFormat, m_hourMinSecFmt.format(new Date()));
 144                 pw.println("  <P>" + dataCollected + "</P>");
 145
 146                 remainArray.append(" ]");
 147                 writeScript(pw, remainArray.toString(), remainCount);
 148                 pw.println("</BODY></HTML>");
 149         }
 150 }