Merge pull request #34 from informatik-ag-ngl/f/changeable_user

Added ability to change profile pic, username and password

client/.classpath

@@ -13,13 +13,14 @@
 	</classpathentry>
 	<classpathentry kind="src" output="target/test-classes" path="src/test/java">
 		<attributes>
+			<attribute name="test" value="true"/>
 			<attribute name="optional" value="true"/>
 			<attribute name="maven.pomderived" value="true"/>
-			<attribute name="test" value="true"/>
 		</attributes>
 	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11">
 		<attributes>
+			<attribute name="module" value="true"/>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>

client/.settings/org.eclipse.jdt.core.prefs

@@ -18,6 +18,7 @@ org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 org.eclipse.jdt.core.compiler.doc.comment.support=enabled
 org.eclipse.jdt.core.compiler.problem.APILeak=warning
+org.eclipse.jdt.core.compiler.problem.annotatedTypeArgumentToUnannotated=info
 org.eclipse.jdt.core.compiler.problem.annotationSuperInterface=warning
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.autoboxing=ignore

client/src/main/java/envoy/client/data/commands/SystemCommandsMap.java

@@ -37,7 +37,9 @@ public final class SystemCommandsMap {
 	 * @see SystemCommandsMap#isValidKey(String)
 	 * @since Envoy Client v0.2-beta
 	 */
-	public void add(String command, SystemCommand systemCommand) { if (isValidKey(command)) systemCommands.put(command, systemCommand); }
+	public void add(String command, SystemCommand systemCommand) {
+		if (isValidKey(command)) systemCommands.put(command.toLowerCase(), systemCommand);
+	}
 
 	/**
 	 * This method checks if the input String is a key in the map and returns the
@@ -60,7 +62,7 @@ public final class SystemCommandsMap {
 	 * @return the wrapped system command, if present
 	 * @since Envoy Client v0.2-beta
 	 */
-	public Optional<SystemCommand> get(String input) { return Optional.ofNullable(systemCommands.get(getCommand(input))); }
+	public Optional<SystemCommand> get(String input) { return Optional.ofNullable(systemCommands.get(getCommand(input.toLowerCase()))); }
 
 	/**
 	 * This method ensures that the "/" of a {@link SystemCommand} is stripped.<br>

client/src/main/java/envoy/client/net/Client.java

@@ -158,6 +158,12 @@ public class Client implements Closeable {
 		// Process IsTyping events
 		receiver.registerProcessor(IsTyping.class, eventBus::dispatch);
 
+		// Process PasswordChangeResults
+		receiver.registerProcessor(PasswordChangeResult.class, eventBus::dispatch);
+
+		// Process ProfilePicChanges
+		receiver.registerProcessor(ProfilePicChange.class, eventBus::dispatch);
+
 		// Send event
 		eventBus.register(SendEvent.class, evt -> {
 			try {
@@ -193,7 +199,7 @@ public class Client implements Closeable {
 	 * @param evt the event to send
 	 * @throws IOException if the event did not reach the server
 	 */
-	public void sendEvent(Event<?> evt) throws IOException { writeObject(evt); }
+	public void sendEvent(Event<?> evt) throws IOException { if (online) writeObject(evt); }
 
 	/**
 	 * Requests a new {@link IDGenerator} from the server.

client/src/main/java/envoy/client/ui/controller/ChatScene.java

@@ -20,7 +20,6 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.collections.transformation.FilteredList;
 import javafx.fxml.FXML;
-import javafx.scene.Node;
 import javafx.scene.control.*;
 import javafx.scene.control.Alert.AlertType;
 import javafx.scene.image.Image;
@@ -43,6 +42,7 @@ import envoy.client.net.Client;
 import envoy.client.net.WriteProxy;
 import envoy.client.ui.*;
 import envoy.client.ui.listcell.*;
+import envoy.client.util.ReflectionUtil;
 import envoy.data.*;
 import envoy.data.Attachment.AttachmentType;
 import envoy.event.*;
@@ -161,7 +161,7 @@ public final class ChatScene implements Restorable {
 		rotateButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("rotate", (int) (DEFAULT_ICON_SIZE * 1.5))));
 		messageSearchButton.setGraphic(new ImageView(IconUtil.loadIconThemeSensitive("search", DEFAULT_ICON_SIZE)));
 		clientProfilePic.setImage(IconUtil.loadIconThemeSensitive("user_icon", 43));
-		Rectangle clip = new Rectangle();
+		final Rectangle clip = new Rectangle();
 		clip.setWidth(43);
 		clip.setHeight(43);
 		clip.setArcHeight(43);
@@ -175,7 +175,7 @@ public final class ChatScene implements Restorable {
 			// The sender of the message is the recipient of the chat
 			// Exceptions: this user is the sender (sync) or group message (group is
 			// recipient)
-			final long recipientID = message instanceof GroupMessage || message.getSenderID() == localDB.getUser().getID() ? message.getRecipientID()
+			final var recipientID = message instanceof GroupMessage || message.getSenderID() == localDB.getUser().getID() ? message.getRecipientID()
 					: message.getSenderID();
 			localDB.getChat(recipientID).ifPresent(chat -> {
 				chat.insert(message);
@@ -229,9 +229,8 @@ public final class ChatScene implements Restorable {
 			switch (e.getOperationType()) {
 				case ADD:
 					if (contact instanceof User) localDB.getUsers().put(contact.getName(), (User) contact);
-					final Chat chat = contact instanceof User ? new Chat(contact) : new GroupChat(client.getSender(), contact);
+					final var chat = contact instanceof User ? new Chat(contact) : new GroupChat(client.getSender(), contact);
 					Platform.runLater(() -> ((ObservableList<Chat>) chats.getSource()).add(0, chat));
-
 					break;
 				case REMOVE:
 					Platform.runLater(() -> chats.getSource().removeIf(c -> c.getRecipient().equals(contact)));
@@ -276,7 +275,7 @@ public final class ChatScene implements Restorable {
 		chatList.setItems(chats);
 		contactLabel.setText(localDB.getUser().getName());
 		MessageControl.setLocalDB(localDB);
-    MessageControl.setSceneContext(sceneContext);
+		MessageControl.setSceneContext(sceneContext);
 
 		if (!client.isOnline()) updateInfoLabel("You are offline", "infoLabel-info");
 
@@ -296,7 +295,7 @@ public final class ChatScene implements Restorable {
 	private void chatListClicked() {
 		if (chatList.getSelectionModel().isEmpty()) return;
 
-		final Contact user = chatList.getSelectionModel().getSelectedItem().getRecipient();
+		final var user = chatList.getSelectionModel().getSelectedItem().getRecipient();
 		if (user != null && (currentChat == null || !user.equals(currentChat.getRecipient()))) {
 
 			// LEON: JFC <===> JAVA FRIED CHICKEN <=/=> Java Foundation Classes
@@ -337,7 +336,7 @@ public final class ChatScene implements Restorable {
 		if (currentChat != null) {
 			topBarContactLabel.setText(currentChat.getRecipient().getName());
 			if (currentChat.getRecipient() instanceof User) {
-				String status = ((User) currentChat.getRecipient()).getStatus().toString();
+				final String status = ((User) currentChat.getRecipient()).getStatus().toString();
 				topBarStatusLabel.setText(status);
 				topBarStatusLabel.getStyleClass().add(status.toLowerCase());
 				recipientProfilePic.setImage(IconUtil.loadIconThemeSensitive("user_icon", 43));
@@ -345,7 +344,7 @@ public final class ChatScene implements Restorable {
 				topBarStatusLabel.setText(currentChat.getRecipient().getContacts().size() + " members");
 				recipientProfilePic.setImage(IconUtil.loadIconThemeSensitive("group_icon", 43));
 			}
-			Rectangle clip = new Rectangle();
+			final Rectangle clip = new Rectangle();
 			clip.setWidth(43);
 			clip.setHeight(43);
 			clip.setArcHeight(43);
@@ -364,7 +363,7 @@ public final class ChatScene implements Restorable {
 	@FXML
 	private void settingsButtonClicked() {
 		sceneContext.load(SceneContext.SceneInfo.SETTINGS_SCENE);
-		sceneContext.<SettingsScene>getController().initializeData(sceneContext);
+		sceneContext.<SettingsScene>getController().initializeData(sceneContext, client);
 	}
 
 	/**
@@ -430,7 +429,7 @@ public final class ChatScene implements Restorable {
 			}
 
 			// Get attachment type (default is document)
-			AttachmentType type = AttachmentType.DOCUMENT;
+			var type = AttachmentType.DOCUMENT;
 			switch (fileChooser.getSelectedExtensionFilter().getDescription()) {
 				case "Pictures":
 					type = AttachmentType.PICTURE;
@@ -476,9 +475,14 @@ public final class ChatScene implements Restorable {
 	 * @since Envoy Client v0.1-beta
 	 */
 	private void doABarrelRoll(int rotations, double animationTime) {
-		// contains all Node objects in ChatScene in alphabetical order
+		// Limiting the rotations and duration
-		final var rotatableNodes = new Node[] { attachmentButton, attachmentView, contactLabel, infoLabel, messageList, messageTextArea, postButton,
+		rotations		= Math.min(rotations, 100000);
-				remainingChars, rotateButton, scene, settingsButton, chatList, voiceButton };
+		rotations		= Math.max(rotations, 1);
+		animationTime	= Math.min(animationTime, 150);
+		animationTime	= Math.max(animationTime, 0.25);
+
+		// contains all Node objects in ChatScene
+		final var rotatableNodes = ReflectionUtil.getAllDeclaredNodeVariables(this);
 		for (final var node : rotatableNodes) {
 			// Sets the animation duration to {animationTime}
 			final var rotateTransition = new RotateTransition(Duration.seconds(animationTime), node);
@@ -505,7 +509,7 @@ public final class ChatScene implements Restorable {
 		messageTextUpdated();
 		// Sending an IsTyping event if none has been sent for
 		// IsTyping#millisecondsActive
-		if (client.isOnline() && currentChat.getLastWritingEvent() + IsTyping.millisecondsActive <= System.currentTimeMillis()) {
+		if (currentChat.getLastWritingEvent() + IsTyping.millisecondsActive <= System.currentTimeMillis()) {
 			eventBus.dispatch(new SendEvent(new IsTyping(getChatID(), currentChat.getRecipient().getID())));
 			currentChat.lastWritingEventWasNow();
 		}
@@ -514,9 +518,9 @@ public final class ChatScene implements Restorable {
 	}
 
 	/**
-	 * Returns the id that should be used to send things to the server:
+	 * Returns the id that should be used to send things to the server: the id of
-	 * the id of 'our' {@link User} if the recipient of that object is another User,
+	 * 'our' {@link User} if the recipient of that object is another User, else the
-	 * else the id of the {@link Group} 'our' user is sending to.
+	 * id of the {@link Group} 'our' user is sending to.
 	 *
 	 * @return an id that can be sent to the server
 	 * @since Envoy Client v0.2-beta
@@ -570,8 +574,8 @@ public final class ChatScene implements Restorable {
 	 * @since Envoy Client v0.1-beta
 	 */
 	private void updateRemainingCharsLabel() {
-		final int	currentLength	= messageTextArea.getText().length();
+		final var	currentLength	= messageTextArea.getText().length();
-		final int	remainingLength	= MAX_MESSAGE_LENGTH - currentLength;
+		final var	remainingLength	= MAX_MESSAGE_LENGTH - currentLength;
 		remainingChars.setText(String.format("remaining chars: %d/%d", remainingLength, MAX_MESSAGE_LENGTH));
 		remainingChars.setTextFill(Color.rgb(currentLength, remainingLength, 0, 1));
 	}
@@ -660,9 +664,8 @@ public final class ChatScene implements Restorable {
 
 	/**
 	 * Updates the {@code attachmentView} in terms of visibility.<br>
-	 * Additionally resets the shown image to
+	 * Additionally resets the shown image to {@code DEFAULT_ATTACHMENT_VIEW_IMAGE}
-	 * {@code DEFAULT_ATTACHMENT_VIEW_IMAGE} if another image is currently
+	 * if another image is currently present.
-	 * present.
 	 *
 	 * @param visible whether the {@code attachmentView} should be displayed
 	 * @since Envoy Client v0.1-beta
@@ -695,6 +698,6 @@ public final class ChatScene implements Restorable {
 	@FXML
 	private void searchContacts() {
 		chats.setPredicate(contactSearch.getText().isBlank() ? c -> true
-		: c -> c.getRecipient().getName().toLowerCase().contains(contactSearch.getText().toLowerCase()));
+				: c -> c.getRecipient().getName().toLowerCase().contains(contactSearch.getText().toLowerCase()));
 	}
 }

client/src/main/java/envoy/client/ui/controller/SettingsScene.java

@@ -3,10 +3,9 @@ package envoy.client.ui.controller;
 import javafx.fxml.FXML;
 import javafx.scene.control.*;
 
+import envoy.client.net.Client;
 import envoy.client.ui.SceneContext;
-import envoy.client.ui.settings.DownloadSettingsPane;
+import envoy.client.ui.settings.*;
-import envoy.client.ui.settings.GeneralSettingsPane;
-import envoy.client.ui.settings.SettingsPane;
 
 /**
  * Project: <strong>envoy-client</strong><br>
@@ -28,10 +27,14 @@ public class SettingsScene {
 
 	/**
 	 * @param sceneContext enables the user to return to the chat scene
+	 * @param client       the {@code Client} used to get the current user and to
+	 *                     check if this user is online
 	 * @since Envoy Client v0.1-beta
 	 */
-	public void initializeData(SceneContext sceneContext) {
+	public void initializeData(SceneContext sceneContext, Client client) {
 		this.sceneContext = sceneContext;
+		settingsList.getItems().add(new GeneralSettingsPane());
+		settingsList.getItems().add(new UserSettingsPane(sceneContext, client.getSender(), client.isOnline()));
 		settingsList.getItems().add(new DownloadSettingsPane(sceneContext));
 	}
 
@@ -45,8 +48,6 @@ public class SettingsScene {
 				if (!empty && item != null) setGraphic(new Label(item.getTitle()));
 			}
 		});
-
-		settingsList.getItems().add(new GeneralSettingsPane());
 	}
 
 	@FXML

client/src/main/java/envoy/client/ui/listcell/AbstractListCell.java

@@ -1,5 +1,6 @@
 package envoy.client.ui.listcell;
 
+import javafx.scene.Cursor;
 import javafx.scene.Node;
 import javafx.scene.control.ContentDisplay;
 import javafx.scene.control.ListCell;
@@ -34,7 +35,12 @@ public abstract class AbstractListCell<T, U extends Node> extends ListCell<T> {
 	@Override
 	protected final void updateItem(T item, boolean empty) {
 		super.updateItem(item, empty);
-		setGraphic(empty || item == null ? null : renderItem(item));
+		if (!(empty || item == null)) {
+			setCursor(Cursor.HAND);
+			setGraphic(renderItem(item));
+		} else {
+			setGraphic(null);
+		}
 	}
 
 	/**

client/src/main/java/envoy/client/ui/listcell/GenericListCell.java

@@ -19,7 +19,7 @@ import javafx.scene.control.ListView;
  */
 public final class GenericListCell<T, U extends Node> extends AbstractListCell<T, U> {
 
-	private Function<? super T, U> renderer;
+	private final Function<? super T, U> renderer;
 
 	/**
 	 * @param listView the list view inside of which the cell will be displayed

client/src/main/java/envoy/client/ui/settings/DownloadSettingsPane.java

@@ -1,11 +1,8 @@
 package envoy.client.ui.settings;
 
 import javafx.geometry.Insets;
-import javafx.scene.control.Button;
+import javafx.scene.control.*;
-import javafx.scene.control.CheckBox;
-import javafx.scene.control.Label;
 import javafx.scene.layout.HBox;
-import javafx.scene.layout.VBox;
 import javafx.stage.DirectoryChooser;
 
 import envoy.client.ui.SceneContext;
@@ -31,18 +28,22 @@ public class DownloadSettingsPane extends SettingsPane {
 	 */
 	public DownloadSettingsPane(SceneContext sceneContext) {
 		super("Download");
-		final var vbox = new VBox(15);
+		setSpacing(15);
-		vbox.setPadding(new Insets(15));
+		setPadding(new Insets(15));
 		// checkbox to disable asking
 		final var checkBox = new CheckBox(settings.getItems().get("autoSaveDownloads").getUserFriendlyName());
 		checkBox.setSelected(settings.isDownloadSavedWithoutAsking());
+		checkBox.setTooltip(new Tooltip("Determines whether a \"Select save location\" - dialogue will be shown when saving attachments."));
 		checkBox.setOnAction(e -> settings.setDownloadSavedWithoutAsking(checkBox.isSelected()));
-		vbox.getChildren().add(checkBox);
+		getChildren().add(checkBox);
 
 		// Displaying the default path to save to
-		vbox.getChildren().add(new Label(settings.getItems().get("downloadLocation").getDescription() + ":"));
+		final var pathLabel = new Label(settings.getItems().get("downloadLocation").getDescription() + ":");
-		final var	hbox		= new HBox(20);
+		pathLabel.setWrapText(true);
-		final var	currentPath	= new Label(settings.getDownloadLocation().getAbsolutePath());
+		getChildren().add(pathLabel);
+		final var hbox = new HBox(20);
+		Tooltip.install(hbox, new Tooltip("Determines the location where attachments will be saved to."));
+		final var currentPath = new Label(settings.getDownloadLocation().getAbsolutePath());
 		hbox.getChildren().add(currentPath);
 
 		// Setting the default path
@@ -59,7 +60,6 @@ public class DownloadSettingsPane extends SettingsPane {
 			}
 		});
 		hbox.getChildren().add(button);
-		vbox.getChildren().add(hbox);
+		getChildren().add(hbox);
-		getChildren().add(vbox);
 	}
 }

client/src/main/java/envoy/client/ui/settings/GeneralSettingsPane.java

@@ -1,9 +1,7 @@
 package envoy.client.ui.settings;
 
-import java.util.List;
-
 import javafx.scene.control.ComboBox;
-import javafx.scene.layout.VBox;
+import javafx.scene.control.Tooltip;
 
 import envoy.client.data.SettingsItem;
 import envoy.client.event.ThemeChangeEvent;
@@ -25,30 +23,36 @@ public class GeneralSettingsPane extends SettingsPane {
 	 */
 	public GeneralSettingsPane() {
 		super("General");
-		final var vbox = new VBox();
+		setSpacing(10);
 
 		// TODO: Support other value types
-		List.of("hideOnClose", "enterToSend")
+		final var	settingsItems		= settings.getItems();
-			.stream()
+		final var	hideOnCloseCheckbox	= new SettingsCheckbox((SettingsItem<Boolean>) settingsItems.get("hideOnClose"));
-			.map(settings.getItems()::get)
+		hideOnCloseCheckbox.setTooltip(new Tooltip("If selected, Envoy will still be present in the task bar when closed."));
-			.map(i -> new SettingsCheckbox((SettingsItem<Boolean>) i))
+		getChildren().add(hideOnCloseCheckbox);
-			.forEach(vbox.getChildren()::add);
+
+		final var	enterToSendCheckbox	= new SettingsCheckbox((SettingsItem<Boolean>) settingsItems.get("enterToSend"));
+		final var	enterToSendTooltip	= new Tooltip(
+				"If selected, messages can be sent pressing \"Enter\". They can always be sent by pressing \"Ctrl\" + \"Enter\"");
+		enterToSendTooltip.setWrapText(true);
+		enterToSendCheckbox.setTooltip(enterToSendTooltip);
+		getChildren().add(enterToSendCheckbox);
 
 		final var combobox = new ComboBox<String>();
 		combobox.getItems().add("dark");
 		combobox.getItems().add("light");
+		combobox.setTooltip(new Tooltip("Determines the current theme Envoy will be displayed in."));
 		combobox.setValue(settings.getCurrentTheme());
 		combobox.setOnAction(
 				e -> { settings.setCurrentTheme(combobox.getValue()); EventBus.getInstance().dispatch(new ThemeChangeEvent(combobox.getValue())); });
-		vbox.getChildren().add(combobox);
+		getChildren().add(combobox);
 
 		final var statusComboBox = new ComboBox<UserStatus>();
 		statusComboBox.getItems().setAll(UserStatus.values());
 		statusComboBox.setValue(UserStatus.ONLINE);
+		statusComboBox.setTooltip(new Tooltip("Change your current status"));
 		// TODO add action when value is changed
 		statusComboBox.setOnAction(e -> {});
-		vbox.getChildren().add(statusComboBox);
+		getChildren().add(statusComboBox);
-
-		getChildren().add(vbox);
 	}
 }

client/src/main/java/envoy/client/ui/settings/SettingsPane.java

@@ -1,6 +1,6 @@
 package envoy.client.ui.settings;
 
-import javafx.scene.layout.Pane;
+import javafx.scene.layout.VBox;
 
 import envoy.client.data.Settings;
 
@@ -12,7 +12,7 @@ import envoy.client.data.Settings;
  * @author Kai S. K. Engelbart
  * @since Envoy Client v0.1-beta
  */
-public abstract class SettingsPane extends Pane {
+public abstract class SettingsPane extends VBox {
 
 	protected String title;
 

client/src/main/java/envoy/client/ui/settings/UserSettingsPane.java

@@ -0,0 +1,203 @@
+package envoy.client.ui.settings;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javafx.event.EventHandler;
+import javafx.geometry.Pos;
+import javafx.scene.Cursor;
+import javafx.scene.control.*;
+import javafx.scene.control.Alert.AlertType;
+import javafx.scene.image.Image;
+import javafx.scene.image.ImageView;
+import javafx.scene.input.InputEvent;
+import javafx.scene.layout.HBox;
+import javafx.stage.FileChooser;
+
+import envoy.client.event.SendEvent;
+import envoy.client.ui.IconUtil;
+import envoy.client.ui.SceneContext;
+import envoy.client.ui.custom.ProfilePicImageView;
+import envoy.client.util.ReflectionUtil;
+import envoy.data.User;
+import envoy.event.*;
+import envoy.util.Bounds;
+import envoy.util.EnvoyLog;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>UserSettingsPane.java</strong><br>
+ * Created: <strong>31.07.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Client v0.2-beta
+ */
+public class UserSettingsPane extends SettingsPane {
+
+	private boolean	profilePicChanged, usernameChanged, validPassword;
+	private byte[]	currentImageBytes;
+	private String	newUsername, newPassword = "";
+
+	private final ImageView		profilePic				= new ProfilePicImageView(null, 60);
+	private final TextField		usernameTextField		= new TextField();
+	private final PasswordField	currentPasswordField	= new PasswordField();
+	private final PasswordField	newPasswordField		= new PasswordField();
+	private final PasswordField	repeatNewPasswordField	= new PasswordField();
+	private final Button		saveButton				= new Button("Save");
+
+	private final Tooltip beOnlineReminder = new Tooltip("You need to be online to modify your acount.");
+
+	private static final EventBus	eventBus	= EventBus.getInstance();
+	private static final Logger		logger		= EnvoyLog.getLogger(UserSettingsPane.class);
+
+	/**
+	 * Creates a new {@code UserSettingsPane}.
+	 *
+	 * @param sceneContext the {@code SceneContext} to block input to Envoy
+	 * @param user         the user who wants to customize his profile
+	 * @param online       whether this user is currently online
+	 * @since Envoy Client v0.2-beta
+	 */
+	public UserSettingsPane(SceneContext sceneContext, User user, boolean online) {
+		super("User");
+		setSpacing(10);
+
+		// Display of profile pic change mechanism
+		final var hbox = new HBox();
+		// TODO: display current profile pic
+		profilePic.setImage(IconUtil.loadIconThemeSensitive("user_icon"));
+		profilePic.setCursor(Cursor.HAND);
+		profilePic.setFitWidth(60);
+		profilePic.setFitHeight(60);
+		profilePic.setOnMouseClicked(e -> {
+			if (!online) return;
+			final var pictureChooser = new FileChooser();
+
+			pictureChooser.setTitle("Select a new profile pic");
+			pictureChooser.setInitialDirectory(new File(System.getProperty("user.home")));
+			pictureChooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Pictures", "*.png", "*.jpg", "*.bmp", "*.gif"));
+
+			final var file = pictureChooser.showOpenDialog(sceneContext.getStage());
+
+			if (file != null) {
+
+				// Check max file size
+				if (file.length() > 5E6) {
+					new Alert(AlertType.WARNING, "The selected file exceeds the size limit of 5MB!").showAndWait();
+					return;
+				}
+
+				try {
+					currentImageBytes = Files.readAllBytes(file.toPath());
+					profilePic.setImage(new Image(new ByteArrayInputStream(currentImageBytes)));
+					profilePicChanged = true;
+				} catch (final IOException e1) {
+					e1.printStackTrace();
+				}
+			}
+		});
+		hbox.getChildren().add(profilePic);
+
+		// Displaying the username change mechanism
+		final var username = user.getName();
+		newUsername = username;
+		usernameTextField.setText(username);
+		final EventHandler<? super InputEvent> textChanged = e -> {
+			newUsername = usernameTextField.getText();
+			usernameChanged = newUsername != username;
+		};
+		usernameTextField.setOnInputMethodTextChanged(textChanged);
+		usernameTextField.setOnKeyTyped(textChanged);
+		hbox.getChildren().add(usernameTextField);
+		getChildren().add(hbox);
+
+		// "Displaying" the password change mechanism
+		final HBox[]	passwordHBoxes	= { new HBox(), new HBox(), new HBox() };
+		final Label[]	passwordLabels	= { new Label("Enter current password:"), new Label("Enter new password:"),
+				new Label("Repeat new password:") };
+
+		final PasswordField[]					passwordFields	= { currentPasswordField, newPasswordField, repeatNewPasswordField };
+		final EventHandler<? super InputEvent>	passwordEntered	= e -> {
+																	newPassword		= newPasswordField.getText();
+																	validPassword	= newPassword.equals(repeatNewPasswordField.getText())
+																			&& !newPasswordField.getText().isBlank();
+																};
+		newPasswordField.setOnInputMethodTextChanged(passwordEntered);
+		newPasswordField.setOnKeyTyped(passwordEntered);
+		repeatNewPasswordField.setOnInputMethodTextChanged(passwordEntered);
+		repeatNewPasswordField.setOnKeyTyped(passwordEntered);
+
+		for (int i = 0; i < passwordHBoxes.length; i++) {
+			final var hBox2 = passwordHBoxes[i];
+			passwordLabels[i].setWrapText(true);
+			hBox2.getChildren().add(passwordLabels[i]);
+			hBox2.getChildren().add(passwordFields[i]);
+			getChildren().add(hBox2);
+		}
+
+		// Displaying the save button
+		saveButton.setOnAction(e -> save(user.getID(), currentPasswordField.getText()));
+		saveButton.setAlignment(Pos.BOTTOM_RIGHT);
+		getChildren().add(saveButton);
+
+		final var offline = !online;
+		ReflectionUtil.getAllDeclaredNodeVariables(this).forEach(node -> node.setDisable(offline));
+		if (offline) {
+			final var infoLabel = new Label("You shall not pass!\n(... Unless you would happen to be online)");
+			infoLabel.setId("infoLabel-warning");
+			infoLabel.setWrapText(true);
+			getChildren().add(infoLabel);
+
+			Tooltip.install(this, beOnlineReminder);
+		} else Tooltip.uninstall(this, beOnlineReminder);
+	}
+
+	/**
+	 * Saves the given input and sends the changed input to the server
+	 *
+	 * @param username the new username
+	 * @since Envoy Client v0.2-beta
+	 */
+	private void save(long userID, String oldPassword) {
+
+		// The profile pic was changed
+		if (profilePicChanged) {
+			final var profilePicChangeEvent = new ProfilePicChange(currentImageBytes, userID);
+			eventBus.dispatch(profilePicChangeEvent);
+			eventBus.dispatch(new SendEvent(profilePicChangeEvent));
+			logger.log(Level.INFO, "The user just changed his profile pic.");
+		}
+
+		// The username was changed
+		final var validContactName = Bounds.isValidContactName(newUsername);
+		if (usernameChanged && validContactName) {
+			final var nameChangeEvent = new NameChange(userID, newUsername);
+			eventBus.dispatch(new SendEvent(nameChangeEvent));
+			eventBus.dispatch(nameChangeEvent);
+			logger.log(Level.INFO, "The user just changed his name to " + newUsername + ".");
+		} else if (!validContactName) {
+			final var alert = new Alert(AlertType.ERROR);
+			alert.setTitle("Invalid username");
+			alert.setContentText("The entered username does not conform with the naming limitations: " + Bounds.CONTACT_NAME_PATTERN);
+			alert.showAndWait();
+			logger.log(Level.INFO, "An invalid username was requested.");
+			return;
+		}
+
+		// The password was changed
+		if (validPassword) {
+			eventBus.dispatch(new SendEvent(new PasswordChangeRequest(newPassword, oldPassword, userID)));
+			logger.log(Level.INFO, "The user just tried to change his password!");
+		} else if (!(validPassword || newPassword.isBlank())) {
+			final var alert = new Alert(AlertType.ERROR);
+			alert.setTitle("Unequal Password");
+			alert.setContentText("Repeated password is unequal to the chosen new password");
+			alert.showAndWait();
+			return;
+		}
+	}
+}

client/src/main/java/envoy/client/util/ReflectionUtil.java

@@ -0,0 +1,88 @@
+package envoy.client.util;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import javafx.scene.Node;
+
+/**
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>ReflectionUtil.java</strong><br>
+ * Created: <strong>02.08.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Client v0.2-beta
+ */
+public class ReflectionUtil {
+
+	private ReflectionUtil() {}
+
+	/**
+	 * Gets all declared variables of the given instance that have the specified
+	 * class<br>
+	 * (i.e. can get all {@code JComponents} (Swing) or {@code Nodes} (JavaFX) in a
+	 * GUI class).
+	 * <p>
+	 * <b>Important: If you are using a module, you first need to declare <br>
+	 * "opens {your_package} to envoy.client.util;" in your module-info.java</b>.
+	 *
+	 * @param <T>          the type of the object
+	 * @param <R>          the type to return
+	 * @param instance     the instance of a given class whose values are to be
+	 *                     evaluated
+	 * @param typeToReturn the type of variable to return
+	 * @return all variables in the given instance that have the requested type
+	 * @throws RuntimeException if an exception occurs
+	 * @since Envoy Client v0.2-beta
+	 */
+	public static <T, R> Stream<R> getAllDeclaredVariablesOfTypeAsStream(T instance, Class<R> typeToReturn) {
+		return Arrays.stream(instance.getClass().getDeclaredFields()).filter(field -> typeToReturn.isAssignableFrom(field.getType())).map(field -> {
+			try {
+				field.setAccessible(true);
+				final var value = field.get(instance);
+				field.setAccessible(false);
+				return value;
+			} catch (IllegalArgumentException | IllegalAccessException e) {
+				throw new RuntimeException(e);
+			}
+		}).map(typeToReturn::cast);// field ->
+		// typeToReturn.isAssignableFrom(field.getClass())).map(typeToReturn::cast);
+	}
+
+	/**
+	 * Gets all declared variables of the given instance that are children of
+	 * {@code Node}.
+	 * <p>
+	 * <b>Important: If you are using a module, you first need to declare <br>
+	 * "opens {your_package} to envoy.client.util;" in your module-info.java</b>.
+	 *
+	 * @param <T>      the type of the instance
+	 * @param instance the instance of a given class whose values are to be
+	 *                 evaluated
+	 * @return all variables of the given object that have the requested type as
+	 *         {@code Stream}
+	 * @since Envoy Client v0.2-beta
+	 */
+	public static <T> Stream<Node> getAllDeclaredNodeVariablesAsStream(T instance) {
+		return getAllDeclaredVariablesOfTypeAsStream(instance, Node.class);
+	}
+
+	/**
+	 * Gets all declared variables of the given instance that are children of
+	 * {@code Node}<br>
+	 * <p>
+	 * <b>Important: If you are using a module, you first need to declare <br>
+	 * "opens {your_package} to envoy.client.util;" in your module-info.java</b>.
+	 *
+	 * @param <T>      the type of the instance
+	 * @param instance the instance of a given class whose values are to be
+	 *                 evaluated
+	 * @return all variables of the given object that have the requested type
+	 * @since Envoy Client v0.2-beta
+	 */
+	public static <T> List<Node> getAllDeclaredNodeVariables(T instance) {
+		return getAllDeclaredNodeVariablesAsStream(instance).collect(Collectors.toList());
+	}
+}

client/src/main/java/envoy/client/util/package-info.java

@@ -0,0 +1,11 @@
+/**
+ * This package contains utility classes for use in envoy-client.
+ * <p>
+ * Project: <strong>envoy-client</strong><br>
+ * File: <strong>package-info.java</strong><br>
+ * Created: <strong>02.08.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Client v0.2-beta
+ */
+package envoy.client.util;

client/src/main/java/module-info.java

@@ -19,6 +19,7 @@ module envoy {
 	requires javafx.graphics;
 
 	opens envoy.client.ui to javafx.graphics, javafx.fxml;
-	opens envoy.client.ui.controller to javafx.graphics, javafx.fxml;
+	opens envoy.client.ui.controller to javafx.graphics, javafx.fxml, envoy.client.util;
 	opens envoy.client.ui.custom to javafx.graphics, javafx.fxml;
+	opens envoy.client.ui.settings to envoy.client.util;
 }

client/src/main/resources/fxml/ChatScene.fxml

@@ -54,7 +54,7 @@
                   </Label>
                   <HBox id="underline" alignment="TOP_CENTER" prefHeight="41.0" prefWidth="296.0" spacing="5.0">
                      <children>
-      						<Button mnemonicParsing="true" onAction="#addContactButtonClicked" prefHeight="27.0" prefWidth="82.0" text=" Add Contact">
+      						<Button mnemonicParsing="true" onAction="#addContactButtonClicked" prefWidth="100.0" text=" Add Contact">
       							<padding>
       								<Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
       							</padding>
@@ -62,10 +62,13 @@
                               <Insets />
                            </HBox.margin>
       						</Button>
-                        <Button mnemonicParsing="false" prefHeight="27.0" prefWidth="82.0" text="New Group">
+                        <Button mnemonicParsing="false" prefWidth="100.0" text="New Group">
                            <HBox.margin>
                               <Insets />
-                           </HBox.margin></Button>
+                           </HBox.margin>
+                           <padding>
+                              <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
+                           </padding></Button>
                      </children>
                      <VBox.margin>
                         <Insets left="10.0" right="10.0" top="5.0" />

common/src/main/java/envoy/event/PasswordChangeRequest.java

@@ -0,0 +1,46 @@
+package envoy.event;
+
+import envoy.data.Contact;
+
+/**
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>PasswordChangeRequest.java</strong><br>
+ * Created: <strong>31.07.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Common v0.2-beta
+ */
+public class PasswordChangeRequest extends Event<String> {
+
+	private final long		id;
+	private final String	oldPassword;
+
+	private static final long serialVersionUID = 0L;
+
+	/**
+	 * @param newPassword the new password of that user
+	 * @param oldPassword the old password of that user
+	 * @param userID      the ID of the user who wants to change his password
+	 * @since Envoy Common v0.2-beta
+	 */
+	public PasswordChangeRequest(String newPassword, String oldPassword, long userID) {
+		super(newPassword);
+		this.oldPassword	= oldPassword;
+		id					= userID;
+	}
+
+	/**
+	 * @return the ID of the {@link Contact} this event is related to
+	 * @since Envoy Common v0.2-alpha
+	 */
+	public long getID() { return id; }
+
+	/**
+	 * @return the old password of the underlying user
+	 * @since Envoy Common v0.2-beta
+	 */
+	public String getOldPassword() { return oldPassword; }
+
+	@Override
+	public String toString() { return "PasswordChangeRequest[id=" + id + "]"; }
+}

common/src/main/java/envoy/event/PasswordChangeResult.java

@@ -0,0 +1,26 @@
+package envoy.event;
+
+/**
+ * This class acts as a notice to the user whether his
+ * {@link envoy.event.PasswordChangeRequest} was successful.
+ * <p>
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>PasswordChangeResult.java</strong><br>
+ * Created: <strong>01.08.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Common v0.2-beta
+ */
+public class PasswordChangeResult extends Event<Boolean> {
+
+	private static final long serialVersionUID = 1L;
+
+	/**
+	 * Creates an instance of {@code PasswordChangeResult}.
+	 *
+	 * @param value whether the preceding {@link envoy.event.PasswordChangeRequest}
+	 *              was successful.
+	 * @since Envoy Common v0.2-beta
+	 */
+	public PasswordChangeResult(boolean value) { super(value); }
+}

common/src/main/java/envoy/event/ProfilePicChange.java

@@ -0,0 +1,32 @@
+package envoy.event;
+
+/**
+ * Project: <strong>envoy-common</strong><br>
+ * File: <strong>ProfilePicChange.java</strong><br>
+ * Created: <strong>31.07.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Common v0.2-beta
+ */
+public class ProfilePicChange extends Event<byte[]> {
+
+	private final long id;
+
+	private static final long serialVersionUID = 0L;
+
+	/**
+	 * @param value  the byte[] of the new image
+	 * @param userID the ID of the user who changed his profile pic
+	 * @since Envoy Common v0.2-beta
+	 */
+	public ProfilePicChange(byte[] value, long userID) {
+		super(value);
+		id = userID;
+	}
+
+	/**
+	 * @return the ID of the user changing his profile pic
+	 * @since Envoy Common v0.2-beta
+	 */
+	public long getId() { return id; }
+}

server/src/main/java/envoy/server/Startup.java

@@ -70,7 +70,10 @@ public class Startup {
 						new IDGeneratorRequestProcessor(),
 						new UserSearchProcessor(),
 						new ContactOperationProcessor(),
-						new IsTypingProcessor())));
+						new IsTypingProcessor(),
+						new NameChangeProcessor(),
+						new ProfilePicChangeProcessor(),
+						new PasswordChangeRequestProcessor())));
 
 		// Initialize the current message ID
 		final PersistenceManager persistenceManager = PersistenceManager.getInstance();

server/src/main/java/envoy/server/data/Contact.java

@@ -18,7 +18,7 @@ import javax.persistence.*;
  */
 
 @Entity
-@Table(name = "contacts")
+@Table(name = "contacts", uniqueConstraints = { @UniqueConstraint(columnNames = { "name" }) })
 @Inheritance(strategy = InheritanceType.SINGLE_TABLE)
 public abstract class Contact {
 

server/src/main/java/envoy/server/processors/PasswordChangeRequestProcessor.java

@@ -0,0 +1,35 @@
+package envoy.server.processors;
+
+import java.io.IOException;
+import java.util.logging.Level;
+
+import envoy.event.PasswordChangeRequest;
+import envoy.event.PasswordChangeResult;
+import envoy.server.data.PersistenceManager;
+import envoy.server.net.ObjectWriteProxy;
+import envoy.server.util.PasswordUtil;
+import envoy.util.EnvoyLog;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>PasswordChangeRequestProcessor.java</strong><br>
+ * Created: <strong>31.07.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Server v0.2-beta
+ */
+public class PasswordChangeRequestProcessor implements ObjectProcessor<PasswordChangeRequest> {
+
+	@Override
+	public void process(PasswordChangeRequest event, long socketID, ObjectWriteProxy writeProxy) throws IOException {
+		final var	persistenceManager		= PersistenceManager.getInstance();
+		final var	user					= persistenceManager.getUserByID(event.getID());
+		final var	logger					= EnvoyLog.getLogger(PasswordChangeRequestProcessor.class);
+		final var	correctAuthentication	= PasswordUtil.validate(event.getOldPassword(), user.getPasswordHash());
+		if (correctAuthentication) {
+			user.setPasswordHash(PasswordUtil.hash(event.get()));
+			logger.log(Level.INFO, user + " changed his password");
+		} else logger.log(Level.INFO, user + " tried changing his password but provided insufficient authentication");
+		writeProxy.write(socketID, new PasswordChangeResult(correctAuthentication));
+	}
+}

server/src/main/java/envoy/server/processors/ProfilePicChangeProcessor.java

@@ -0,0 +1,20 @@
+package envoy.server.processors;
+
+import java.io.IOException;
+
+import envoy.event.ProfilePicChange;
+import envoy.server.net.ObjectWriteProxy;
+
+/**
+ * Project: <strong>envoy-server-standalone</strong><br>
+ * File: <strong>ProfilePicChangeProcessor.java</strong><br>
+ * Created: <strong>01.08.2020</strong><br>
+ *
+ * @author Leon Hofmeister
+ * @since Envoy Server v0.2-beta
+ */
+public class ProfilePicChangeProcessor implements ObjectProcessor<ProfilePicChange> {
+
+	@Override
+	public void process(ProfilePicChange event, long socketID, ObjectWriteProxy writeProxy) throws IOException {}
+}