tim/prune/gui/CheckVersionScreen.java

   1 package tim.prune.gui;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.URL;
   6 import java.text.DateFormat;
   7 import java.text.ParseException;
   8 import java.text.SimpleDateFormat;
   9 import java.util.Properties;
  10 import javax.swing.JFrame;
  11 import javax.swing.JOptionPane;
  12
  13 import tim.prune.GpsPruner;
  14 import tim.prune.I18nManager;
  15 import tim.prune.browser.BrowserLauncher;
  16
  17 /**
  18  * Class to check the version of Prune
  19  * and show an appropriate dialog
  20  */
  21 public abstract class CheckVersionScreen
  22 {
  23         /**
  24          * Show the check version dialog
  25          * @param inParent parent frame
  26          */
  27         public static void show(JFrame inParent)
  28         {
  29                 final String filePathStart = "http://activityworkshop.net/software/prune/prune_versioncheck_";
  30                 final String filePathEnd = ".txt";
  31                 String latestVer = null;
  32                 String nextVersion = null;
  33                 String releaseDate = null;
  34                 Properties props = new Properties();
  35                 try
  36                 {
  37                         // Load properties from the url on the server
  38                         InputStream inStream = new URL(filePathStart + GpsPruner.VERSION_NUMBER + filePathEnd).openStream();
  39                         props.load(inStream);
  40
  41                         // Extract the three fields we want, ignore others
  42                         latestVer = props.getProperty("prune.latestversion");
  43                         nextVersion = props.getProperty("prune.nextversion");
  44                         releaseDate = props.getProperty("prune.releasedate");
  45                 }
  46                 catch (IOException ioe) {
  47                         System.err.println(ioe.getClass().getName() + " - " + ioe.getMessage());
  48                 }
  49
  50                 if (latestVer == null) {
  51                         // Couldn't get version number, show error message
  52                         JOptionPane.showMessageDialog(inParent, I18nManager.getText("dialog.checkversion.error"),
  53                                 I18nManager.getText("dialog.checkversion.title"), JOptionPane.ERROR_MESSAGE);
  54                 }
  55                 else if (latestVer.equals(GpsPruner.VERSION_NUMBER))
  56                 {
  57                         // Version on the server is the same as this one
  58                         String displayMessage = I18nManager.getText("dialog.checkversion.uptodate");
  59                         if (nextVersion != null && !nextVersion.equals(""))
  60                         {
  61                                 displayMessage += "\n\n" + nextVersion;
  62                         }
  63                         // Show information message that the current version is already running
  64                         JOptionPane.showMessageDialog(inParent, displayMessage,
  65                                 I18nManager.getText("dialog.checkversion.title"), JOptionPane.INFORMATION_MESSAGE);
  66                 }
  67                 else
  68                 {
  69                         // A new version is available!
  70                         String displayMessage = I18nManager.getText("dialog.checkversion.newversion1") + " " + latestVer
  71                                 + " " + I18nManager.getText("dialog.checkversion.newversion2");
  72                         try
  73                         {
  74                                 if (releaseDate != null && !releaseDate.equals("")) {
  75                                         displayMessage += "\n\n" + I18nManager.getText("dialog.checkversion.releasedate1") + " "
  76                                                 + DateFormat.getDateInstance(DateFormat.LONG).format(new SimpleDateFormat("y-M-d").parse(releaseDate))
  77                                                 + " " + I18nManager.getText("dialog.checkversion.releasedate2");
  78                                 }
  79                         }
  80                         catch (ParseException pe) {
  81                                 System.err.println("Oops, couldn't parse date: '" + releaseDate + "'");
  82                         }
  83                         displayMessage += "\n\n" + I18nManager.getText("dialog.checkversion.download");
  84
  85                         // Show information message to download the new version
  86                         Object[] buttonTexts = {I18nManager.getText("button.showwebpage"), I18nManager.getText("button.cancel")};
  87                         if (JOptionPane.showOptionDialog(inParent, displayMessage,
  88                                         I18nManager.getText("dialog.checkversion.title"), JOptionPane.YES_NO_OPTION,
  89                                         JOptionPane.INFORMATION_MESSAGE, null, buttonTexts, buttonTexts[1])
  90                                 == JOptionPane.YES_OPTION)
  91                         {
  92                                 // User selected to launch home page
  93                                 new BrowserLauncher().launchBrowser("http://activityworkshop.net/software/prune/download.html");
  94                         }
  95                 }
  96         }
  97 }