Show Logout button when signed in

app/src/main/java/core/notevault/MainActivity.java

@@ -3,6 +3,7 @@ package core.notevault;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
+import android.text.TextUtils;
 import android.util.Log;
 import android.view.MenuItem;
 import android.view.View;
@@ -21,6 +22,7 @@ import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.appcompat.app.AppCompatActivity;
 import core.notevault.data.*;
 import core.notevault.databinding.ActivityMainBinding;
+import core.notevault.sync.auth.AuthRepository;
 import core.notevault.sync.auth.LoginCallback;
 import core.notevault.ui.gallery.GalleryFragment;
 import core.notevault.ui.gallery.detail.ConcertSongSelector;
@@ -37,7 +39,7 @@ import java.util.Date;
 import java.util.List;
 
 public class MainActivity extends AppCompatActivity implements MetaDataDialog.OnMetadataListener,
-        ConcertEditorDialog.OnConcertEditorListener, ConcertSongSelector.OnSongSelectedListener {
+        ConcertEditorDialog.OnConcertEditorListener, ConcertSongSelector.OnSongSelectedListener, LoginCallback {
 
     private AppBarConfiguration mAppBarConfiguration;
     private ActivityMainBinding binding;
@@ -64,9 +66,59 @@ public class MainActivity extends AppCompatActivity implements MetaDataDialog.On
         NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
         NavigationUI.setupWithNavController(navigationView, navController);
 
+        setupLoginButton();
         musicDB = MusicDatabase.getDatabase(this);
     }
 
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        MenuItem loginItem = menu.findItem(R.id.action_login);
+        if (isLoggedIn()) {
+            loginItem.setIcon(R.drawable.logout); // Setze das Logout-Symbol
+        } else {
+            loginItem.setIcon(R.drawable.login); // Setze das Login-Symbol
+        }
+        return super.onPrepareOptionsMenu(menu);
+    }
+
+    public void updateLoginButton() {
+        invalidateOptionsMenu(); // Menü neu zeichnen
+    }
+
+    private void setupLoginButton() {
+        binding.appBarMain.toolbar.setOnMenuItemClickListener(item -> {
+            if (item.getItemId() == R.id.action_login) {
+                if (isLoggedIn()) {
+                    performLogout(); // Logout-Logik aufrufen
+                } else {
+                    showLoginDialog(); // Zeige das Login-Fenster an
+                }
+                return true;
+            }
+            return false;
+        });
+    }
+
+    private boolean isLoggedIn() {
+        AuthRepository authRepository = new AuthRepository(this);
+        return !TextUtils.isEmpty(authRepository.getToken());
+    }
+
+    private void showLoginDialog() {
+        LoginDialogFragment loginDialogFragment = new LoginDialogFragment();
+        loginDialogFragment.show(getSupportFragmentManager(), "login");
+    }
+
+    private void performLogout() {
+        // Füge hier deine Logout-Logik hinzu
+        AuthRepository authRepository = new AuthRepository(this);
+
+        authRepository.logout(); // Implementiere die Token-Löschung
+        updateLoginButton();
+    }
+
+
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.
@@ -198,4 +250,13 @@ public class MainActivity extends AppCompatActivity implements MetaDataDialog.On
     }
 
 
+    @Override
+    public void onSuccess() {
+        updateLoginButton();
+    }
+
+    @Override
+    public void onError(String error) {
+
+    }
 }

app/src/main/java/core/notevault/sync/auth/AuthRepository.java

@@ -9,11 +9,11 @@ import retrofit2.Response;
 
 public class AuthRepository {
     private final AuthService authService;
-    private final SharedPreferences preferences;
+    private final TokenManager tokenManager;
 
     public AuthRepository(Context context) {
         this.authService = ApiClient.getRetrofitInstance(context).create(AuthService.class);
-        this.preferences = context.getSharedPreferences("app_prefs", Context.MODE_PRIVATE);
+        this.tokenManager = new TokenManager(context);
     }
 
     public void performLogin(String username, String password, LoginCallback callback) {
@@ -25,7 +25,6 @@ public class AuthRepository {
                 if (response.isSuccessful() && response.body() != null) {
                     String token = response.body().getToken();
                     saveToken(token);
-
                     // Erfolgsrückmeldung an den Callback senden
                     callback.onSuccess();
                 } else {
@@ -43,8 +42,14 @@ public class AuthRepository {
     }
 
     private void saveToken(String token) {
-        SharedPreferences.Editor editor = preferences.edit();
-        editor.putString("jwt_token", token);
-        editor.apply();
+        tokenManager.saveToken(token);
+    }
+
+    public String getToken() {
+        return tokenManager.getToken();
+    }
+
+    public void logout() {
+        tokenManager.clearToken();
     }
 }

app/src/main/java/core/notevault/sync/auth/TokenManager.java

@@ -0,0 +1,31 @@
+package core.notevault.sync.auth;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+public class TokenManager {
+    private static final String PREF_NAME = "app_preferences";
+    private static final String KEY_TOKEN = "jwt_token";
+
+    private SharedPreferences sharedPreferences;
+
+    public TokenManager(Context context) {
+        sharedPreferences = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
+    }
+
+    public void saveToken(String token) {
+        SharedPreferences.Editor editor = sharedPreferences.edit();
+        editor.putString(KEY_TOKEN, token);
+        editor.apply();
+    }
+
+    public String getToken() {
+        return sharedPreferences.getString(KEY_TOKEN, null);
+    }
+
+    public void clearToken() {
+        SharedPreferences.Editor editor = sharedPreferences.edit();
+        editor.remove(KEY_TOKEN);
+        editor.apply();
+    }
+}

app/src/main/java/core/notevault/ui/login/LoginCallBackImpl.java

@@ -15,6 +15,7 @@ public class LoginCallBackImpl implements LoginCallback {
     @Override
     public void onSuccess() {
         Toast.makeText(context, "Login successfull", Toast.LENGTH_SHORT).show();
+
     }
 
     @Override

app/src/main/java/core/notevault/ui/login/LoginDialogFragment.java

@@ -2,6 +2,7 @@ package core.notevault.ui.login;
 
 import android.app.AlertDialog;
 import android.app.Dialog;
+import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -11,8 +12,22 @@ import androidx.annotation.Nullable;
 import androidx.fragment.app.DialogFragment;
 import core.notevault.R;
 import core.notevault.sync.auth.AuthRepository;
+import core.notevault.sync.auth.LoginCallback;
+import retrofit2.Call;
+import retrofit2.Callback;
 
 public class LoginDialogFragment extends DialogFragment {
+    private LoginCallback loginCallback;
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        if (context instanceof LoginCallback) {
+            loginCallback = (LoginCallback) context;
+        } else {
+            throw new RuntimeException(context.toString() + " must implement LoginDialogListener");
+        }
+    }
 
     @NonNull
     @Override
@@ -31,7 +46,7 @@ public class LoginDialogFragment extends DialogFragment {
                     String username = usernameInput.getText().toString();
                     String password = passwordInput.getText().toString();
 
-                    authRepository.performLogin(username, password, new LoginCallBackImpl(this.getContext()));
+                    authRepository.performLogin(username, password, loginCallback);
                 } )
                 .setNegativeButton("Abbrechen", (dialog, which) -> {} )
                 .create();

app/src/main/res/drawable/logout.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960">
+  <path
+      android:pathData="M200,840q-33,0 -56.5,-23.5T120,760v-560q0,-33 23.5,-56.5T200,120h280v80L200,200v560h280v80L200,840ZM640,680 L585,622 687,520L360,520v-80h327L585,338l55,-58 200,200 -200,200Z"
+      android:fillColor="#e8eaed"/>
+</vector>

app/src/main/res/menu/main.xml

@@ -4,6 +4,6 @@
     <item
             android:id="@+id/action_login"
             android:title="Login"
-            android:icon="@drawable/login"
+            android:icon="@drawable/logout"
             app:showAsAction="always"/> <!-- Wichtig: immer in der Toolbar anzeigen -->
 </menu>