initial logout button setup

src/main/java/edu/kit/kastel/sdq/intelligrade/extensions/settings/ArtemisSettings.java

@@ -87,7 +87,23 @@ public class ArtemisSettings implements Configurable {
             this.apply();
             PluginState.getInstance().connect();
         });
-        contentPanel.add(loginButton, "span 2, growx");
+        contentPanel.add(loginButton, "span 1, growx");
+
+        // Button to log out of artemis
+        var logoutButton = new JButton("Logout");
+        logoutButton.addActionListener(a -> {
+            //request a logout
+            boolean loggedOut = PluginState.getInstance().logout();
+            //clear data iff logout was actually carried out
+            if (loggedOut) {
+                ArtemisCredentialsProvider.getInstance().setJwt(null);
+                ArtemisCredentialsProvider.getInstance().setArtemisPassword(null);
+                ArtemisSettingsState.getInstance().setJwtExpiry(null);
+                this.apply();
+            }
+
+        });
+        contentPanel.add(logoutButton, "span 1, growx");
 
         // Login options
         contentPanel.add(new TitledSeparator("Login Options"), "span 2, growx");

src/main/java/edu/kit/kastel/sdq/intelligrade/login/CefUtils.java

@@ -29,6 +29,27 @@ private CefUtils() {
         throw new IllegalAccessError("Utility Class");
     }
 
+    /**
+     * Reset the CEF Browsers cookies to remove the artemis login token
+     */
+    public static void resetCookies() {
+        if (browserClient == null) {
+            browserClient = JBCefApp.getInstance().createClient();
+        }
+
+        // offscreen rendering is problematic on Linux
+        JBCefBrowser browser = JBCefBrowser.createBuilder()
+                .setClient(browserClient)
+                .setOffScreenRendering(false)
+                .build();
+
+        //clear cookies
+        CefApp.getInstance().onInitialization(state -> {
+            browser.getJBCefCookieManager().deleteCookies(null, null);
+        });
+        browser.dispose();
+    }
+
     /**
      * Create and display a Window containing a JBCef Window to request login. Call this on the EDT!
      *
@@ -47,11 +68,6 @@ public static CompletableFuture<JBCefCookie> jcefBrowserLogin() {
                 .setUrl(ArtemisSettingsState.getInstance().getArtemisInstanceUrl())
                 .build();
 
-        // TODO the following code deletes the jwt cookie, which is needed for a "fresh" login
-        // TODO add this somewhere where it is useful
-        // CefApp.getInstance().onInitialization(state -> {
-        //     browser.getJBCefCookieManager().deleteCookies(null, null);
-        // });
 
         // set focus handler because it gets invoked sometimes and causes NullPE otherwise
         CefFocusHandler focusHandler = new CefWindowFocusHandler();

src/main/java/edu/kit/kastel/sdq/intelligrade/state/PluginState.java

@@ -38,8 +38,11 @@
 import edu.kit.kastel.sdq.intelligrade.utils.ArtemisUtils;
 import edu.kit.kastel.sdq.intelligrade.utils.IntellijUtil;
 import org.apache.commons.io.FileUtils;
+import org.cef.CefApp;
 import org.jetbrains.annotations.NotNull;
 
+import javax.swing.*;
+
 public class PluginState {
     private static final Logger LOG = Logger.getInstance(PluginState.class);
 
@@ -61,6 +64,32 @@ public static PluginState getInstance() {
         return pluginState;
     }
 
+    /**
+     * Logs out while displaying a warning if an assessment is still running
+     *
+     * @return true iff the logout was completed, false otherwise
+     */
+    public boolean logout() {
+        int answer = JOptionPane.OK_OPTION;
+        //check if confirmation is necessary because assessment is running
+        if (isAssessing()) {
+            answer = JOptionPane.showConfirmDialog(null,
+                    "Logging out while assessing will terminate the current assessment. Continue?",
+                    "Logging out while assessing!", JOptionPane.OK_CANCEL_OPTION, JOptionPane.WARNING_MESSAGE);
+        }
+        //actually reset state
+        if (answer == JOptionPane.OK_OPTION) {
+            this.resetState();
+
+            //reset JBCef cookies iff available
+            if (JBCefApp.isSupported()) {
+                CefUtils.resetCookies();
+            }
+        }
+
+        return answer == JOptionPane.OK_OPTION;
+    }
+
     public void connect() {
         this.resetState();