feat&Update[donationPage]: Add PaymentMethod and backButton from rele…

…ase, fixing up upcoming mege conflict

src/main/java/edu/group5/app/view/donationpage/DonationPageView.java

@@ -16,6 +16,7 @@
 import javafx.scene.Node;
 
 import java.math.BigDecimal;
+import java.util.Objects;
 
 public class DonationPageView extends BorderPane {
   private final AppState appState;
@@ -24,25 +25,38 @@ public class DonationPageView extends BorderPane {
 
   private Node currentlySelected = null;
   private TextField customAmountField;
+  private Node selectedPaymentMethod = null;
+  private Button donateBtn;
 
   public DonationPageView(AppState appState, NavigationController nav, DonationController donationController) {
     this.appState = appState;
     this.nav = nav;
     this.donationController = donationController;
 
-    getStylesheets().add(getClass().getResource("/donationpage/donation.css").toExternalForm());
+    getStylesheets().add(Objects.requireNonNull(getClass().getResource("/donationpage/donation.css")).toExternalForm());
 
     VBox content = new VBox();
-    content.getChildren().addAll(createDonationGrid(), createDonateSection());
+    content.getChildren().addAll(createBackButton(), createDonationGrid(), createPaymentMethodSection(), createDonateSection());
 
     content.setOnMouseClicked(e -> {
       if (e.getTarget() == content) {
-        clearSelection(); 
+        clearSelection();
       }
     });
     setCenter(content);
 
   }
+
+  private HBox createBackButton() {
+    Button backBtn = new Button("←");
+    backBtn.getStyleClass().add("back-button");
+    backBtn.setOnAction(e -> nav.showOrganizationPage());
+
+    HBox container = new HBox(backBtn);
+    container.setPadding(new Insets(10, 0, 0, 10));
+    return container;
+  }
+
   private TilePane createDonationGrid(){
     TilePane body = new TilePane();
     body.setAlignment(Pos.CENTER);
@@ -136,8 +150,9 @@ private VBox createCustomButton() {
   }
 
   private HBox createDonateSection() {
-    Button donateBtn = new Button("Donate");
+    donateBtn = new Button("Donate");
     donateBtn.getStyleClass().add("donate-button");
+    donateBtn.setDisable(true);
     donateBtn.setOnAction(e -> donationController.requestDonationConfirmation());
 
     Button clearBtn  = new Button("Clear");
@@ -150,6 +165,23 @@ private HBox createDonateSection() {
     return section;
   }
 
+  public HBox createPaymentMethodSection() {
+    Button appleBtn = new Button("Apple Pay");
+    Button vippsBtn = new Button("Vipps");
+    Button visaBtn = new Button("Visa");
+
+    for (Button btn : new Button[]{appleBtn, vippsBtn, visaBtn}) {
+      btn.getStyleClass().add("payment-method-button");
+      btn.setOnAction(e -> selectPaymentMethod(btn));
+    }
+
+    HBox sectionPm = new HBox(appleBtn, vippsBtn, visaBtn);
+    sectionPm.setAlignment(Pos.CENTER);
+    sectionPm.setSpacing(20);
+    sectionPm.setPadding(new Insets(20, 20, 20, 20));
+    return sectionPm;
+  }
+
   private void selectDonation(Node element) {
     if (currentlySelected != null) {
       currentlySelected.getStyleClass().remove("donation-button-selected");
@@ -159,6 +191,16 @@ private void selectDonation(Node element) {
 
     BigDecimal amount = (BigDecimal) element.getUserData();
     updateDonationAmount(amount);
+    updateDonationButtonState();
+  }
+
+  private void selectPaymentMethod(Node element) {
+    if (selectedPaymentMethod != null) {
+      selectedPaymentMethod.getStyleClass().remove("payment-method-selected");
+    }
+    selectedPaymentMethod = element;
+    selectedPaymentMethod.getStyleClass().add("payment-method-selected");
+    updateDonationButtonState();
   }
 
   private void clearSelection() {
@@ -168,9 +210,16 @@ private void clearSelection() {
       updateDonationAmount(null);
     }
 
+    if (selectedPaymentMethod != null) {
+      selectedPaymentMethod.getStyleClass().remove("payment-method-selected");
+      selectedPaymentMethod = null;
+    }
+
     if (customAmountField  != null) {
       customAmountField.clear();
     }
+
+    updateDonationButtonState();
   }
 
   private void updateDonationAmount(BigDecimal amount) {
@@ -185,4 +234,8 @@ private BigDecimal parseAmount(String amountStr) {
     }
   }
 
+  private void updateDonationButtonState() {
+    donateBtn.setDisable(currentlySelected == null || selectedPaymentMethod == null);
+  }
+
 }