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         Locale m_locale;
  17         FrankBundle m_bundle;
  18         DateFormat m_hourMinFmt;
  19         DateFormat m_hourMinSecFmt;
  20
  21         public Schedule(Locale locale) {
  22                 m_locale = locale;
  23                 m_bundle = FrankBundle.getInst(locale);
  24                 m_hourMinFmt = new SimpleDateFormat("hh:mma", locale);
  25                 m_hourMinSecFmt = new SimpleDateFormat("hh:mm:ssa", locale);
  26
  27                 // We always display times in Ottawa (local) time, because that's the only
  28                 // time that makes sense for a user who wants to know when to catch a bus.
  29                 // In the (unlikely?) event that our server is in a different timezone,
  30                 // we need to explicitly specify the time zone that we want to use.
  31                 TimeZone tz = TimeZone.getTimeZone("America/Toronto");
  32                 m_hourMinFmt.setTimeZone(tz);
  33                 m_hourMinSecFmt.setTimeZone(tz);
  34         }
  35
  36         String trans(String key) {
  37                 return m_bundle.get(key);
  38         }
  39
  40         String mapUrl(double latitude, double longitude) {
  41                 return "http://www.openstreetmap.org/?mlat=" + latitude + "&mlon=" + longitude + "&zoom=15";
  42         }
  43
  44         void writeStyle(PrintWriter pw) {
  45                 pw.println("<STYLE>");
  46                 pw.println("  body {background-color: #F0F0C0; font-size: 1.5em; }");
  47                 pw.println("  #trips {border-collapse: collapse; font-size: 1.5em; }");
  48                 pw.println("  #trips td, #trips th {border: 1px solid #600000; padding: 3px 3px 3px 3px; text-align: center;}");
  49                 pw.println("  #trips th {background-color: #800000; color: #FFFFFF; }");
  50                 pw.println("  #trips tr.ghost td {background-color: #C0C0C0;}");
  51                 pw.println("</STYLE>");
  52         }
  53
  54         // Countdown timer that updates time remaining until each bus is expected.
  55         void writeScript(PrintWriter pw, String remainArray, int remainCount) {
  56                 String min = trans(FrankBundle.MINUTES);
  57                 String sec = trans(FrankBundle.SECONDS);
  58
  59                 pw.println("<SCRIPT>");
  60             pw.println("var start; var interval; var remain;");
  61             pw.println("window.onload = function() { start = new Date(); interval = setInterval(\"Tick()\", 1000); remain = " + remainArray + "; }");
  62             pw.println("function Tick() { ");
  63             pw.println("  var now = new Date(); var delta = Math.floor((now.getTime() - start.getTime()) / 1000); ");
  64             pw.println("  var secs = delta % 60; var mins = Math.floor(delta / 60);");
  65             pw.println("  document.getElementById(\"elapsed\").innerHTML = mins + \"" + min + " \" + secs + \"" + sec + "\";");
  66             pw.println("  for (var i = 0; i < " + remainCount + "; ++i) {");
  67             pw.println("    var id = \"in_\" + i;");
  68             pw.println("    var element = document.getElementById(id);");
  69             pw.println("    var remain_delta = (remain[i] * 60) + 30 - delta;");
  70             pw.println("    if (remain_delta <= 0) {");
  71             pw.println("      element.innerHTML = \"----\";");
  72             pw.println("    } else {");
  73             pw.println("      element.innerHTML = (Math.floor(remain_delta / 60)) + \"" + trans(min) + "\";");
  74             pw.println("    }");
  75             pw.println("  }");
  76             pw.println("}");
  77             pw.println("</SCRIPT>");
  78
  79         }
  80
  81         void writeHeader(PrintWriter pw, String title) {
  82                 pw.println("<HTML>");
  83                 pw.println("<HEAD>");
  84                 pw.println("<TITLE>" + title + "</TITLE>");
  85                 writeStyle(pw);
  86                 pw.println("</HEAD>");
  87         }
  88
  89         void writePage(PrintWriter pw, StopInfo stopInfo)
  90         {
  91                 StringBuilder remainArray = new StringBuilder("[ ");
  92                 int           remainCount = 0;
  93
  94                 String title = stopInfo.getDescr() + " (" + stopInfo.getStopNo() + ")";
  95                 String min = trans(FrankBundle.MINUTES);
  96
  97                 writeHeader(pw, trans(FrankBundle.FRANK) + ": " + title);
  98
  99                 pw.println("<BODY>");
 100                 pw.println("  <TABLE ID=\"trips\">");
 101                 pw.println("    <TR><TH COLSPAN=\"5\">" + title + "</TH></TR>");
 102                 pw.println("    <TR><TH>" +
 103                         trans(FrankBundle.ROUTE) +
 104                                 "</TH><TH>" +
 105                                 trans(FrankBundle.DESTINATION) +
 106                                 "</TH><TH>" +
 107                                 trans(FrankBundle.ETA) +
 108                                 "</TH><TH>" +
 109                                 trans(FrankBundle.REMAIN) +
 110                                 "</TH><TH>" +
 111                                 trans(FrankBundle.GPS_READ) +
 112                                 "</TH>");
 113
 114                 for (int routeIdx = 0; routeIdx < stopInfo.getNumRoutes(); ++routeIdx) {
 115                         Route route = stopInfo.getRoute(routeIdx);
 116                         for (int tripIdx = 0; tripIdx < route.getNumTrips(); ++tripIdx) {
 117                                 Trip trip = route.getTrip(tripIdx);
 118                                 boolean isGhost = ((-1) == trip.getAdjAge());
 119                                 if (isGhost) {
 120                                         // GPS is off.  This bus may not exist.
 121                                         pw.println("    <TR CLASS=\"ghost\">");
 122                                 } else {
 123                                         pw.println("    <TR>");
 124                                 }
 125                                 pw.println("      <TD>" + route.getRouteNo() + "</TD>");
 126                                 pw.println("      <TD>" + trip.getDest() + "</TD>");
 127                                 pw.println("      <TD>" + m_hourMinFmt.format(trip.getETA()) + "</TD>");
 128
 129                                 pw.println("      <TD><SPAN ID=\"in_" + remainCount + "\">"+ trip.getAdjTime()+min+"</SPAN></TD>");
 130                                 if (remainCount > 0) {
 131                                         remainArray.append(", ");
 132                                 }
 133                                 remainArray.append(trip.getAdjTime());
 134                                 remainCount++;
 135
 136                                 if (trip.getAdjAge() < 0) {
 137                                         pw.println("      <TD>" + trans(FrankBundle.GPS_OFF) + "</TD>");
 138                                 }
 139                                 else {
 140                                         pw.println("      <TD><A HREF=\"" + mapUrl(trip.getLatitude(), trip.getLongitude()) +
 141                                                            "\">" + m_hourMinSecFmt.format(trip.getGPSTime()) + "</A></TD>");
 142                                 }
 143                                 pw.println("    </TR>");
 144                         }
 145                 }
 146
 147                 pw.println("  </TABLE>");
 148
 149                 String dataCollectedFormat = trans(FrankBundle.DATA_COLLECTED);
 150                 String dataCollected = MessageFormat.format(dataCollectedFormat, m_hourMinSecFmt.format(new Date()));
 151                 pw.println("  <P>" + dataCollected + "</P>");
 152
 153                 remainArray.append(" ]");
 154                 writeScript(pw, remainArray.toString(), remainCount);
 155                 pw.println("</BODY></HTML>");
 156         }
 157 }