package mlga.ui;
import java.awt.Desktop;
import java.awt.Dimension;
import java.awt.Font;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URISyntaxException;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.UIManager;
import javax.swing.event.HyperlinkEvent.EventType;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
/**
* A panel for rendering Github updates, somewhat faithfully.
*
* @author ShadowMoose
*/
public class GithubPanel extends JFrame {
private static final long serialVersionUID = -8603001629015114181L;
/**
* The project owner, name, and release JAR name, for this Github Repository. Used for lookup.
*/
private static final String author = "PsiLupan", project = "MakeLobbiesGreatAgain", directJAR = "MLGA.jar";
/**
* The String flag to be included in the Release Notes Body if the update is mandatory for all below the new version.
*/
private static final String mandatory = "Required";
private String html = "";
private double version = 0;
private JEditorPane ed;
private int updates = 0, required = 0;
/**
* Creates the new Panel and parses the supplied HTML. <br>
* <b> Supported Github Markdown: </b><i> Lists (unordered), Links, Images, Bold ('**' and '__'), Strikethrough, & Italics. </i>
*
* @param currentVersion The version of the Jar currently running.
*/
public GithubPanel(double currentVersion) {
this.version = currentVersion;
setTitle("MLGA Update");
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
parseReleases();
} catch (Exception e1) {
e1.printStackTrace();
}
if (updates <= 0) {
return;
}
ed = new JEditorPane("text/html", html);
ed.setEditable(false);
ed.putClientProperty(JEditorPane.HONOR_DISPLAY_PROPERTIES, Boolean.TRUE);
ed.setFont(new Font("Helvetica", 0, 12));
ed.addHyperlinkListener(he -> {
// Listen to link clicks and open them in the browser.
if (he.getEventType() == EventType.ACTIVATED && Desktop.isDesktopSupported()) {
try {
Desktop.getDesktop().browse(he.getURL().toURI());
System.exit(0);
} catch (IOException | URISyntaxException e) {
e.printStackTrace();
}
}
});
final JScrollPane scrollPane = new JScrollPane(ed);
scrollPane.setPreferredSize(new Dimension(1100, 300));
add(scrollPane);
setDefaultCloseOperation(DISPOSE_ON_CLOSE);
pack();
setLocationRelativeTo(null);
}
/**
* Parse the given markup into HTML, and append it to the full html string.
*
* @param releaseVersion The Version Number, exactly as Github lists it.
* @param title The title to add for this entry.
* @param markup The markup to parse.
*/
private void parse(String releaseVersion, String title, String markup) {
String formatted = "";
formatted += "<a style='color: #0366d6;text-decoration: none;' href='https://github.com/" + author + "/" + project + "/releases/tag/" + releaseVersion + "'><h1>" + title + "</h1></a>";
boolean list = false;
for (String s : markup.split("\n")) {
if (s.startsWith(" *")) {
s = "\t" + s.replaceFirst("\\*", "◌") + "<br>";
} else if (s.startsWith("* ")) {
if (!list) {
s = "<ul>" + s;
list = true;
}
s = s.replaceFirst("\\* ", "<li>") + "</li>";
} else if (list) {
list = false;
s += "</ul>";
}
formatted += s.trim() + (!list ? "<br>" : "");
}
formatted = parseTag(formatted, "\\*\\*", "b");// Bold
formatted = parseTag(formatted, "__", "b");// Also Bold
formatted = parseTag(formatted, "\\*", "i");// Italics
formatted = parseTag(formatted, "~~", "s");// Strikethrough (JEPanel uses HTML 3.2)
formatted = hyperlinks(formatted, "\\!\\[(.+?)\\]\\s?+\\((.+?)\\)", "<img src='[2]' alt='[1]'></img>");// Images
formatted = hyperlinks(formatted, "\\[(.+?)\\]\\s?+\\((.+?)\\)", "<a href='[2]'>[1]</a>");// Embedded Links
formatted += "<br><center><a style='color: #0366d6;' href='https://github.com/" + author + "/" + project + "/releases/download/" + releaseVersion + "/" + directJAR + "'><b>[ Direct Download ]</b></a></center>";
this.html += formatted;
}
/**
* If there are updates, displays this panel to the user and hangs until closed. <br>
* Panel will terminate the JVM if the user clicks a link within it.
*
* @return True if an update is located that is mandatory.
*/
public boolean prompt() {
if (updates <= 0) {
return true;
}
setVisible(true);
try {
while (this.isDisplayable()) Thread.sleep(200);
} catch (Exception e) {
e.printStackTrace();
}
if (required > 0) {
System.err.println("Mandatory updates: " + required);
return false;
}
return true;
}
/**
* Replaced the given regex tag with the surrpounding HTML element tags.
*/
private String parseTag(String body, String tag, String replace) {
boolean open = false;
Pattern r = Pattern.compile(tag);
Matcher m = r.matcher(body);
while (m.find()) {
body = body.replaceFirst(tag, "<" + (open ? "/" : "") + replace + ">");
open = !open;
}
if (open) {
// Uh oh, an unclosed tag.
body += "</" + replace + ">";
}
return body;
}
/**
* Matches (using regex groups) for pattern in body, then replaces any full match strings with template. <br>
* Template can contain references to group numbers, matched by the regex statement, to be inserted back into the template. <br>
* The groups can be referenced in template via "[group_number]"
*
* @param body The Text to parse.
* @param pattern The pattern, and all groupings, to look for using Regex.
* @param template The template to swap the regex full match for. Can also contain references to group numbers.
*
* @return The full body, with replacements made.
*/
private String hyperlinks(String body, String pattern, String template) {
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(body);
while (m.find()) {
String tmp = template;
for (int i = 0; i <= m.groupCount(); i++) {
tmp = tmp.replace("[" + i + "]", m.group(i));
}
body = body.replace(m.group(0), tmp);
}
return body;
}
/**
* Connects to Github to check for project updates.
*
* @throws IOException
*/
private void parseReleases() throws IOException {
InputStream is = new URL("https://api.github.com/repos/" + author + "/" + project + "/releases").openStream();
JsonElement ele = new JsonParser().parse(new InputStreamReader(is));
is.close();
SimpleDateFormat gdate = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
JsonArray arr = ele.getAsJsonArray();
for (int i = 0; i < arr.size(); i++) {
JsonObject obj = arr.get(i).getAsJsonObject();
try {
String vers = obj.get("tag_name").getAsString();
if (vers.contains("-")) {
vers = vers.substring(0, vers.indexOf("-")).trim();
}
double nv;
try {
nv = Double.parseDouble(vers);
}catch(NumberFormatException e){
nv = 2.0;
}
if (nv <= this.version)
continue;// Skip older updates.
System.out.println("Version: " + nv);
if (i > 0)
html += "<hr />";
String body = obj.get("body").getAsString().trim();
String title = "<b style='color:black;'>" + sdf.format(gdate.parse(obj.get("published_at").getAsString())) + ":</b> " + obj.get("name").getAsString();
if (body.contains(mandatory)) {
required++;
title += "<b style='color: red;'> - (Required Update)</b>";
}
parse(obj.get("tag_name").getAsString().trim(), title, body);
updates++;
} catch (ClassCastException cce) {
System.out.println("Ignoring build: " + obj.get("tag_name").getAsString());
} catch (Exception e) {
e.printStackTrace();
}
}
setTitle("MLGA Update - " + updates + " releases behind");
}
}
