import java.awt.Component;
import java.awt.Desktop;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import javax.swing.JOptionPane;
import de.psychometrica.tools.gui.Message;
/**
* @author Wolfgang Lenhard
*
*/
public class UpdateManager {
private int[] internal = { -1, -1, -1 };
private int[] external = { -1, -1, -1 };
private String url = "";
private boolean connection = false;
private boolean dataIntegrity = false;
private boolean isNewerVersion = false;
private String updateMessage = "";
/**
* Constructor for update manager
*
* @param major
* major version information of currently installed program
* @param medium
* medium version information of currently installed program
* @param minor
* minor version information of currently installed program
* @param location
* location of update information file
*/
public UpdateManager(int major, int medium, int minor, String location) {
internal[0] = major;
internal[1] = medium;
internal[2] = minor;
connection = checkUpdates(location);
if ((external[0] == -1) || (external[1] == -1) || (external[2] == -1)
|| (url.length() == 0))
dataIntegrity = false;
else
dataIntegrity = true;
isNewerVersion = compareVersion();
}
/**
* @return if external version is higher than internal version
*/
private boolean compareVersion() {
if (external[0] > internal[0]) {
return true;
} else if (external[0] == internal[0]) {
if (external[1] > internal[1]) {
return true;
} else if (external[1] == internal[1]) {
if (external[2] > internal[2])
return true;
}
}
return false;
}
/**
* check for update information at the given location
*
* @param location
* the location to look at
* @return if connection was successful
*/
private boolean checkUpdates(String location) {
String nextLine;
URL url = null;
URLConnection urlConn = null;
InputStreamReader inStream = null;
BufferedReader buff = null;
String updateInfo = "";
String message = "";
try {
url = new URL(location);
urlConn = url.openConnection();
inStream = new InputStreamReader(urlConn.getInputStream());
buff = new BufferedReader(inStream);
updateInfo = buff.readLine();
while (true) {
nextLine = buff.readLine();
if (nextLine != null) {
if (!nextLine.startsWith("###"))
message += nextLine;
} else {
break;
}
}
String[] data = updateInfo.split("\t");
external[0] = Integer.parseInt(data[0]);
external[1] = Integer.parseInt(data[1]);
external[2] = Integer.parseInt(data[2]);
this.url = data[3];
this.updateMessage = message;
} catch (MalformedURLException e) {
e.printStackTrace();
return false;
} catch (IOException e1) {
dataIntegrity = false;
}
return true;
}
/**
* Open the system standard browser and navigate to the given homepage
*
* @return the success (true)
*/
public boolean browseURL() {
Desktop desktop = null;
if (Desktop.isDesktopSupported()) {
desktop = Desktop.getDesktop();
try {
URI uri = new URI(this.url);
desktop.browse(uri);
} catch (URISyntaxException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
} else
return false;
}
/**
* Open the system standard browser and navigate to the given homepage
*
* @param url
* the page to navigate to
* @return the success (true)
*/
public boolean browseURL(String url) {
Desktop desktop = null;
if (Desktop.isDesktopSupported()) {
desktop = Desktop.getDesktop();
try {
URI uri = new URI(url);
desktop.browse(uri);
} catch (URISyntaxException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
} else
return false;
}
/**
* @return the connection
*/
public boolean isConnection() {
return connection;
}
/**
* @return the dataIntegrity
*/
public boolean isDataIntegrity() {
return dataIntegrity;
}
/**
* @return the isNewerVersion
*/
public boolean isNewerVersion() {
return isNewerVersion;
}
/**
* @return the url
*/
public String getUrl() {
return url;
}
/**
* Display the update message
*
* @param frame
* The component to display message on
* @param HOMEPAGE
* The homepage url
*/
public void message(Component frame, String HOMEPAGE) {
if (!isConnection()) {
Message
.displayAlert(
frame,
"Keine Verbindung",
"<html>Die Update-Informationen konnten nicht abgerufen werden."
+ " Weiterführende Informationen finden Sie im Internet unter\n"
+ HOMEPAGE);
} else if (!isDataIntegrity()) {
int r = JOptionPane
.showConfirmDialog(
frame,
"Die Update-Informationen konnten nicht ermittelt werden.\n"
+ "Weiterführende Informationen finden Sie im Internet unter\n"
+ HOMEPAGE
+ "\n\nSoll diese Seite nun in Ihrem Browser aufgerufen werden?",
"Fehler!", JOptionPane.YES_NO_OPTION,
JOptionPane.INFORMATION_MESSAGE);
if (r == JOptionPane.YES_OPTION) {
boolean success = browseURL(HOMEPAGE);
if (!success) {
JOptionPane.showMessageDialog(frame,
"Der Browser konnte nicht gestartet werden.\n"
+ "Das Update finden Sie unter " + getUrl()
+ ".");
}
}
} else if (isNewerVersion()) {
int r = JOptionPane.CANCEL_OPTION;
if (updateMessage.length() == 0) {
r = JOptionPane.showConfirmDialog(frame,
"Ein Programm-Update (Version " + external[0] + "."
+ external[1] + "." + external[2]
+ ") ist verfügbar.\n"
+ "Soll die Update-Seite (" + getUrl()
+ ")\nnun in Ihrem Browser aufgerufen werden?",
"Update verfügbar", JOptionPane.YES_NO_OPTION,
JOptionPane.INFORMATION_MESSAGE);
} else {
r = Message.displayMessage(frame, "Update verfügbar",
"Ein Programm-Update (Version " + external[0] + "."
+ external[1] + "." + external[2]
+ ") ist verfügbar. "
+ "Soll die Update-Seite\n(" + getUrl()
+ ") nun in Ihrem Browser\naufgerufen werden?",
updateMessage);
}
if (r == JOptionPane.YES_OPTION) {
boolean success = browseURL();
if (!success) {
JOptionPane.showMessageDialog(frame,
"Der Browser konnte nicht gestartet werden.\n"
+ "Das Update finden Sie unter\n"
+ getUrl() + ".");
}
}
} else if (!isNewerVersion()) {
JOptionPane.showMessageDialog(frame,
"Die installierte Programmversion ist aktuell.");
}
}
}
