Better exception handling, progress system

src/main/java/link/infra/packwiz/installer/CLIHandler.java

@@ -9,5 +9,24 @@ public class CLIHandler implements IUserInterface {
 
 	@Override
 	public void show() {}
+
+	@Override
+	public void submitProgress(InstallProgress progress) {
+		StringBuilder sb = new StringBuilder();
+		if (progress.hasProgress) {
+			sb.append('(');
+			sb.append(progress.progress);
+			sb.append('/');
+			sb.append(progress.progressTotal);
+			sb.append(") ");
+		}
+		sb.append(progress.message);
+		System.out.println(sb.toString());
+	}
+
+	@Override
+	public void executeManager(Runnable task) {
+		task.run();
+	}
 	
 }

src/main/java/link/infra/packwiz/installer/IUserInterface.java

@@ -6,11 +6,18 @@ public interface IUserInterface {
 
 	public void handleException(Exception e);
 	
+	/**
+	 * This might not exit straight away, return after calling this!
+	 */
 	public default void handleExceptionAndExit(Exception e) {
 		handleException(e);
 		System.exit(1);
 	};
 	
 	public default void setTitle(String title) {};
+
+	public void submitProgress(InstallProgress progress);
+
+	public void executeManager(Runnable task);
 	
 }

src/main/java/link/infra/packwiz/installer/InstallProgress.java

@@ -0,0 +1,22 @@
+package link.infra.packwiz.installer;
+
+public class InstallProgress {
+	public final String message;
+	public final boolean hasProgress;
+	public final int progress;
+	public final int progressTotal;
+
+	InstallProgress(String message) {
+		this.message = message;
+		hasProgress = false;
+		progress = 0;
+		progressTotal = 0;
+	}
+
+	InstallProgress(String message, int progress, int progressTotal) {
+		this.message = message;
+		hasProgress = true;
+		this.progress = progress;
+		this.progressTotal = progressTotal;
+	}
+}

src/main/java/link/infra/packwiz/installer/InstallWindow.java

@@ -5,6 +5,10 @@ import java.awt.Component;
 import java.awt.EventQueue;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicBoolean;
 
 import javax.swing.JButton;
 import javax.swing.JFrame;
@@ -14,13 +18,16 @@ import javax.swing.JPanel;
 import javax.swing.JProgressBar;
 import javax.swing.UIManager;
 import javax.swing.border.EmptyBorder;
-import java.awt.event.ActionListener;
-import java.awt.event.ActionEvent;
 
 public class InstallWindow implements IUserInterface {
 
 	private JFrame frmPackwizlauncher;
+	private JLabel lblProgresslabel;
+	private JProgressBar progressBar;
+
 	private String title = "Updating modpack...";
+	private SwingWorkerButWithPublicPublish<Void, InstallProgress> worker;
+	private AtomicBoolean aboutToCrash = new AtomicBoolean();
 
 	@Override
 	public void show() {
@@ -52,11 +59,11 @@ public class InstallWindow implements IUserInterface {
 		frmPackwizlauncher.getContentPane().add(panel, BorderLayout.CENTER);
 		panel.setLayout(new BorderLayout(0, 0));
 		
-		JProgressBar progressBar = new JProgressBar();
-		progressBar.setValue(50);
+		progressBar = new JProgressBar();
+		progressBar.setIndeterminate(true);
 		panel.add(progressBar, BorderLayout.CENTER);
 		
-		JLabel lblProgresslabel = new JLabel("Loading...");
+		lblProgresslabel = new JLabel("Loading...");
 		panel.add(lblProgresslabel, BorderLayout.SOUTH);
 		
 		JPanel panel_1 = new JPanel();
@@ -75,8 +82,13 @@ public class InstallWindow implements IUserInterface {
 		JButton btnCancel = new JButton("Cancel");
 		btnCancel.addActionListener(new ActionListener() {
 			public void actionPerformed(ActionEvent arg0) {
-				//updateManager.cleanup();
+				if (worker != null) {
+					worker.cancel(true);
+				}
 				frmPackwizlauncher.dispose();
+				// TODO: show window to ask user what to do
+				System.out.println("Update process cancelled by user!");
+				System.exit(1);
 			}
 		});
 		btnCancel.setAlignmentX(Component.CENTER_ALIGNMENT);
@@ -88,7 +100,23 @@ public class InstallWindow implements IUserInterface {
 
 	@Override
 	public void handleException(Exception e) {
-		JOptionPane.showMessageDialog(null, e.getMessage(), title, JOptionPane.ERROR_MESSAGE);
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				JOptionPane.showMessageDialog(null, e.getMessage(), title, JOptionPane.ERROR_MESSAGE);
+			}
+		});
+	}
+
+	@Override
+	public void handleExceptionAndExit(Exception e) {
+		// Used to prevent the done() handler of SwingWorker executing if the invokeLater hasn't happened yet
+		aboutToCrash.set(true);
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				JOptionPane.showMessageDialog(null, e.getMessage(), title, JOptionPane.ERROR_MESSAGE);
+				System.exit(1);
+			}
+		});
 	}
 	
 	@Override
@@ -103,4 +131,57 @@ public class InstallWindow implements IUserInterface {
 		}
 	}
 
+	@Override
+	public void submitProgress(InstallProgress progress) {
+		if (worker != null) {
+			worker.publishPublic(progress);
+		}
+	}
+
+	@Override
+	public void executeManager(Runnable task) {
+		EventQueue.invokeLater(new Runnable() {
+			public void run() {
+				worker = new SwingWorkerButWithPublicPublish<Void, InstallProgress>() {
+
+					@Override
+					protected Void doInBackground() throws Exception {
+						task.run();
+						return null;
+					}
+
+					@Override
+					protected void process(List<InstallProgress> chunks) {
+						// Only process last chunk
+						if (chunks.size() > 0) {
+							InstallProgress prog = chunks.get(chunks.size() - 1);
+							if (prog.hasProgress) {
+								progressBar.setIndeterminate(false);
+								progressBar.setValue(prog.progress);
+								progressBar.setMaximum(prog.progressTotal);
+							} else {
+								progressBar.setIndeterminate(true);
+								progressBar.setValue(0);
+							}
+							lblProgresslabel.setText(prog.message);
+						}
+					}
+
+					@Override
+					protected void done() {
+						if (aboutToCrash.get()) {
+							return;
+						}
+						// TODO: a better way to do this?
+						frmPackwizlauncher.dispose();
+						System.out.println("Finished successfully!");
+						System.exit(0);
+					}
+			
+				};
+				worker.execute();
+			}
+		});
+	}
+
 }

src/main/java/link/infra/packwiz/installer/Main.java

@@ -1,5 +1,10 @@
 package link.infra.packwiz.installer;
 
+import java.awt.EventQueue;
+import java.awt.GraphicsEnvironment;
+import java.net.URI;
+import java.net.URISyntaxException;
+
 import javax.swing.JOptionPane;
 import javax.swing.UIManager;
 
@@ -10,14 +15,39 @@ import org.apache.commons.cli.Options;
 import org.apache.commons.cli.ParseException;
 
 public class Main {
-	
+
 	// Actual main() is in RequiresBootstrap!
-	
+
 	public Main(String[] args) {
+		// Big overarching try/catch just in case everything breaks
+		try {
+			this.startup(args);
+		} catch (Exception e) {
+			e.printStackTrace();
+			EventQueue.invokeLater(new Runnable() {
+				public void run() {
+					JOptionPane.showMessageDialog(null,
+							"A fatal error occurred: \n" + e.getClass().getCanonicalName() + ": " + e.getMessage(),
+							"packwiz-installer", JOptionPane.ERROR_MESSAGE);
+					System.exit(1);
+				}
+			});
+			// In case the eventqueue is broken, exit after 1 minute
+			try {
+				Thread.sleep(60 * 1000);
+			} catch (InterruptedException e1) {
+				// Good, it was already called?
+				return;
+			}
+			System.exit(1);
+		}
+	}
+
+	protected void startup(String[] args) {
 		Options options = new Options();
 		addNonBootstrapOptions(options);
 		addBootstrapOptions(options);
-		
+
 		CommandLineParser parser = new DefaultParser();
 		CommandLine cmd = null;
 		try {
@@ -32,38 +62,65 @@ public class Main {
 			JOptionPane.showMessageDialog(null, e.getMessage(), "packwiz-installer", JOptionPane.ERROR_MESSAGE);
 			System.exit(1);
 		}
-		
+
 		IUserInterface ui;
-		if (cmd.hasOption("no-gui")) {
+		// if "headless", GUI creation will fail anyway!
+		if (cmd.hasOption("no-gui") || GraphicsEnvironment.isHeadless()) {
 			ui = new CLIHandler();
 		} else {
 			ui = new InstallWindow();
 		}
-		
+
 		String[] unparsedArgs = cmd.getArgs();
 		if (unparsedArgs.length > 1) {
 			ui.handleExceptionAndExit(new RuntimeException("Too many arguments specified!"));
+			return;
 		} else if (unparsedArgs.length < 1) {
 			ui.handleExceptionAndExit(new RuntimeException("URI to install from must be specified!"));
+			return;
 		}
-		
+
 		String title = cmd.getOptionValue("title");
 		if (title != null) {
 			ui.setTitle(title);
 		}
-		
-		String side = cmd.getOptionValue("side");
-		if (side == null) {
-			side = "client";
-		}
 
 		ui.show();
-		
+
+		UpdateManager.Options uOptions = new UpdateManager.Options();
+
+		String side = cmd.getOptionValue("side");
+		if (side != null) {
+			uOptions.side = UpdateManager.Options.Side.from(side);
+		}
+
+		try {
+			uOptions.downloadURI = new URI(unparsedArgs[0]);
+		} catch (URISyntaxException e) {
+			// TODO: better error message?
+			ui.handleExceptionAndExit(e);
+			return;
+		}
+
+		// Start update process!
+		// TODO: start in SwingWorker?
+		try {
+			ui.executeManager(new Runnable(){
+				@Override
+				public void run() {
+					new UpdateManager(uOptions, ui);
+				}
+			});
+		} catch (Exception e) {
+			// TODO: better error message?
+			ui.handleExceptionAndExit(e);
+			return;
+		}
 	}
 
 	// Called by packwiz-installer-bootstrap to set up the help command
 	public static void addNonBootstrapOptions(Options options) {
-		options.addOption("s", "side", true, "Side to install mods from (client/server, defaults to client)"); // TODO: implement
+		options.addOption("s", "side", true, "Side to install mods from (client/server, defaults to client)");
 		options.addOption(null, "title", true, "Title of the installer window");
 	}
 	
@@ -73,7 +130,7 @@ public class Main {
 		options.addOption(null, "bootstrap-update-token", true, "Github API Access Token, for private repositories");
 		options.addOption(null, "bootstrap-no-update", false, "Don't update packwiz-installer");
 		options.addOption(null, "bootstrap-main-jar", true, "Location of the packwiz-installer JAR file");
-		options.addOption("g", "no-gui", false, "Don't display a GUI to show update progress"); // TODO: implement
+		options.addOption("g", "no-gui", false, "Don't display a GUI to show update progress");
 		options.addOption("h", "help", false, "Display this message"); // Implemented in packwiz-installer-bootstrap!
 	}
 	

src/main/java/link/infra/packwiz/installer/SwingWorkerButWithPublicPublish.java

@@ -0,0 +1,13 @@
+package link.infra.packwiz.installer;
+
+import javax.swing.SwingWorker;
+
+// Q: AAA WHAT HAVE YOU DONE THIS IS DISGUSTING
+// A: it just makes things easier, so i can easily have one interface for CLI/GUI
+//    if someone has a better way to do this please PR it
+public abstract class SwingWorkerButWithPublicPublish<T,V> extends SwingWorker<T,V> {
+	@SafeVarargs
+	public final void publishPublic(V... chunks) {
+		publish(chunks);
+	}
+}

src/main/java/link/infra/packwiz/installer/UpdateManager.java

@@ -3,21 +3,86 @@ package link.infra.packwiz.installer;
 import java.net.URI;
 
 public class UpdateManager {
-	
+
 	public final Options opts;
 	public final IUserInterface ui;
-	
+
 	public static class Options {
 		public URI downloadURI;
 		public String manifestFile = "packwiz.json";
+		public Side side = Side.CLIENT;
+
+		public static enum Side {
+			CLIENT("client"), SERVER("server"), BOTH("both", new Side[] { CLIENT, SERVER });
+
+			private final String sideName;
+			private final Side[] depSides;
+
+			Side(String sideName) {
+				this.sideName = sideName.toLowerCase();
+				this.depSides = null;
+			}
+
+			Side(String sideName, Side[] depSides) {
+				this.sideName = sideName.toLowerCase();
+				this.depSides = depSides;
+			}
+
+			@Override
+			public String toString() {
+				return this.sideName;
+			}
+
+			public boolean hasSide(Side tSide) {
+				if (this.equals(tSide)) {
+					return true;
+				}
+				if (this.depSides != null) {
+					for (int i = 0; i < this.depSides.length; i++) {
+						if (this.depSides[i].equals(tSide)) {
+							return true;
+						}
+					}
+				}
+				return false;
+			}
+
+			public static Side from(String name) {
+				String lowerName = name.toLowerCase();
+				for (Side side : Side.values()) {
+					if (side.sideName == lowerName) {
+						return side;
+					}
+				}
+				return null;
+			}
+		}
 	}
-	
+
 	public UpdateManager(Options opts, IUserInterface ui) {
 		this.opts = opts;
 		this.ui = ui;
+		this.start();
 	}
-	
-	public void cleanup() {
-		
+
+	protected void start() {
+		ui.submitProgress(new InstallProgress("Loading pack file..."));
+		try {
+			Thread.sleep(1000);
+		} catch (InterruptedException e) {
+			// Big oof
+		}
+		ui.submitProgress(new InstallProgress("Loading metadata", 1, 2));
+		try {
+			Thread.sleep(1000);
+		} catch (InterruptedException e) {
+			// Big oof
+		}
+		ui.submitProgress(new InstallProgress("Loading magic", 2, 2));
+		try {
+			Thread.sleep(1000);
+		} catch (InterruptedException e) {
+			// Big oof
+		}
 	}
 }