add qr-export for secrets

src/kryptonbutterfly/totp/misc/Utils.java

@@ -6,8 +6,17 @@
 import java.awt.geom.AffineTransform;
 import java.awt.image.AffineTransformOp;
 import java.awt.image.BufferedImage;
+import java.util.Map;
 
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.EncodeHintType;
+import com.google.zxing.MultiFormatWriter;
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+
+import kryptonbutterfly.functions.bool_.BoolToIntFunction;
 import kryptonbutterfly.math.vector._int.Vec2i;
+import kryptonbutterfly.monads.failable.Failable;
+import kryptonbutterfly.monads.opt.Opt;
 
 public class Utils
 {
@@ -70,4 +79,32 @@ public static final BufferedImage mirror(BufferedImage src)
 
 		return result;
 	}
+
+	public static final Opt<BufferedImage> generateQr(
+		String data,
+		Color dark,
+		Color light,
+		int size,
+		ErrorCorrectionLevel level)
+	{
+		final BoolToIntFunction	colorConverter	= bit -> bit ? dark.getRGB() : light.getRGB();
+		final var				sizeRange		= range(size);
+
+		return Failable.attempt(
+			() -> new MultiFormatWriter().encode(
+				data,
+				BarcodeFormat.QR_CODE,
+				size,
+				size,
+				Map.of(EncodeHintType.ERROR_CORRECTION, level.name())))
+			.toOpt(e -> e.printStackTrace())
+			.map(matrix ->
+			{
+				final var image = new BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB);
+				for (int y : sizeRange)
+					for (int x : sizeRange)
+						image.setRGB(x, y, colorConverter.apply(matrix.get(x, y)));
+				return image;
+			});
+	}
 }

src/kryptonbutterfly/totp/prefs/TotpWindowStates.java

@@ -20,4 +20,7 @@ public final class TotpWindowStates
 
 	@Expose
 	public GuiPrefs qrScan = new GuiPrefs(100, 100, 640, 400, JFrame.NORMAL);
+
+	@Expose
+	public GuiPrefs qrExport = new GuiPrefs(100, 100, 230, 280, JFrame.NORMAL);
 }

src/kryptonbutterfly/totp/ui/add/manual/AddKey.java

@@ -1,6 +1,7 @@
 package kryptonbutterfly.totp.ui.add.manual;
 
 import java.awt.BorderLayout;
+import java.awt.FlowLayout;
 import java.awt.GridLayout;
 import java.awt.Window;
 import java.util.function.Consumer;
@@ -31,6 +32,7 @@
 @SuppressWarnings("serial")
 public final class AddKey extends ObservableDialog<BL, TotpEntry, char[]> implements TotpConstants
 {
+	final JButton			btnExport			= new JButton("export");
 	final JTextField		txtAccountname		= new JTextField();
 	final JTextField		txtSecretkey		= new JTextField();
 	final JTextField		txtIssuer			= new JTextField();
@@ -119,6 +121,15 @@ private void init(BL bl)
 
 		verticalBox.add(gridPanel);
 
+		final var exportPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
+		getContentPane().add(exportPanel, BorderLayout.NORTH);
+		{
+			exportPanel.add(btnExport);
+			btnExport.setIcon(Assets.getQr16ByBackground(getBackground()));
+			btnExport.addActionListener(bl::exportQR);
+			btnExport.addKeyListener(bl.escapeListener);
+		}
+
 		getContentPane().add(verticalBox, BorderLayout.CENTER);
 		{
 			gridPanel.add(new JLabel(LABEL_ACCOUNT_NAME));

src/kryptonbutterfly/totp/ui/add/manual/BL.java

@@ -1,5 +1,8 @@
 package kryptonbutterfly.totp.ui.add.manual;
 
+import java.awt.Color;
+import java.awt.Dialog.ModalityType;
+import java.awt.EventQueue;
 import java.awt.Toolkit;
 import java.awt.datatransfer.Clipboard;
 import java.awt.datatransfer.DataFlavor;
@@ -21,13 +24,18 @@
 
 import org.apache.commons.codec.binary.Base32;
 
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
+
+import kryptonbutterfly.functions.void_.Consumer_;
 import kryptonbutterfly.monads.opt.Opt;
 import kryptonbutterfly.totp.TinyTotp;
 import kryptonbutterfly.totp.TotpConstants;
+import kryptonbutterfly.totp.misc.UrlQueryParams;
 import kryptonbutterfly.totp.misc.Utils;
 import kryptonbutterfly.totp.prefs.TotpCategory;
 import kryptonbutterfly.totp.prefs.TotpEntry;
 import kryptonbutterfly.totp.ui.misc.KeyTypedAdapter;
+import kryptonbutterfly.totp.ui.qrexport.QrExportGui;
 import kryptonbutterfly.util.swing.Logic;
 import kryptonbutterfly.util.swing.events.GuiCloseEvent;
 import kryptonbutterfly.util.swing.events.GuiCloseEvent.Result;
@@ -144,6 +152,20 @@ private void setIcon(AddKey gui, String name, BufferedImage img)
 		gui.lblIcon.setToolTipText(name);
 	}
 
+	void exportQR(ActionEvent ae)
+	{
+		gui.if_(gui -> {
+			final var	account		= gui.txtAccountname.getText();
+			final var	secretKey	= gui.txtSecretkey.getText();
+			final var	issuer		= gui.txtIssuer.getText();
+			final var	url			= UrlQueryParams.toUrl(account, secretKey, issuer);
+			Utils.generateQr(url, Color.BLACK, Color.WHITE, 200, ErrorCorrectionLevel.H)
+				.if_(
+					qr -> EventQueue
+						.invokeLater(() -> new QrExportGui(gui, ModalityType.APPLICATION_MODAL, Consumer_.sink(), qr)));
+		});
+	}
+
 	void abort(ActionEvent ae)
 	{
 		gui.if_(AddKey::dispose);

src/kryptonbutterfly/totp/ui/qrexport/BL.java

@@ -0,0 +1,30 @@
+package kryptonbutterfly.totp.ui.qrexport;
+
+import java.awt.event.ActionEvent;
+import java.awt.event.KeyEvent;
+import java.awt.event.KeyListener;
+
+import kryptonbutterfly.totp.TinyTotp;
+import kryptonbutterfly.totp.ui.misc.KeyTypedAdapter;
+import kryptonbutterfly.util.swing.Logic;
+
+final class BL extends Logic<QrExportGui, Void>
+{
+	final KeyListener escapeListener = new KeyTypedAdapter(c -> ok(null), KeyEvent.VK_ESCAPE);
+
+	BL(QrExportGui gui)
+	{
+		super(gui);
+	}
+
+	void ok(ActionEvent ae)
+	{
+		gui.if_(QrExportGui::dispose);
+	}
+
+	@Override
+	protected void disposeAction()
+	{
+		gui.if_(TinyTotp.windowStates.qrExport::persistBounds);
+	}
+}

src/kryptonbutterfly/totp/ui/qrexport/QrExportGui.java

@@ -0,0 +1,57 @@
+package kryptonbutterfly.totp.ui.qrexport;
+
+import java.awt.BorderLayout;
+import java.awt.FlowLayout;
+import java.awt.Window;
+import java.awt.image.BufferedImage;
+import java.util.function.Consumer;
+
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+
+import kryptonbutterfly.totp.TinyTotp;
+import kryptonbutterfly.totp.misc.Assets;
+import kryptonbutterfly.util.swing.ObservableDialog;
+import kryptonbutterfly.util.swing.events.GuiCloseEvent;
+
+@SuppressWarnings("serial")
+public class QrExportGui extends ObservableDialog<BL, Void, Void>
+{
+	private final JButton btnOk = new JButton("ok");
+
+	public QrExportGui(
+		Window owner,
+		ModalityType modality,
+		Consumer<GuiCloseEvent<Void>> closeListener,
+		BufferedImage qr)
+	{
+		super(owner, modality, closeListener);
+		TinyTotp.windowStates.qrExport.setBounds(this);
+		setTitle("Export Secret");
+		setIconImage(Assets.getQr16ByBackground(getBackground()).getImage());
+
+		add(new JLabel(new ImageIcon(qr)), BorderLayout.CENTER);
+
+		final var footerPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
+		add(footerPanel, BorderLayout.SOUTH);
+		footerPanel.add(btnOk);
+
+		businessLogic.if_(this::init);
+
+		setVisible(true);
+	}
+
+	@Override
+	protected BL createBusinessLogic(Void args)
+	{
+		return new BL(this);
+	}
+
+	private void init(BL bl)
+	{
+		btnOk.addActionListener(bl::ok);
+		btnOk.addKeyListener(bl.escapeListener);
+	}
+}