added som restrictions to filetype and error alert

src/main/java/app/controllers/EditorController.java

@@ -33,6 +33,8 @@ import app.model.Model;
 import app.service.LanguageOperations;
 import javafx.fxml.FXML;
 import javafx.fxml.Initializable;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Alert.AlertType;
 
 /**
  * A FXML controller that controls the editor component of the UI
@@ -140,23 +142,44 @@ public class EditorController implements Initializable, Controller {
    * @throws FileNotFoundException
    */
   private void setEditorContent(String filePath) {
-    try (Scanner sc = new Scanner(new File(filePath))) {
+    if (filePath == null) {
       editor.clear();
-      while (sc.hasNextLine()) {
-        editor.appendText(sc.nextLine());
-        editor.appendText("\n");
+      return;
+    }
+    try (Scanner sc = new Scanner(new File(filePath))) {
+      if (filePath.endsWith(".java") || filePath.endsWith(".md")) {
+        editor.clear();
+        while (sc.hasNextLine()) {
+          editor.appendText(sc.nextLine());
+          editor.appendText("\n");
+        }
+      } else {
+        throw new FileNotFoundException();
       }
+
     } catch (FileNotFoundException ex) {
-      // TODO: add better error handling and user feedback
+      Alert error = new Alert(AlertType.ERROR);
+      error.setContentText("Could not be opened!\nMust be a java or md file. Try again.");
+
+      error.showAndWait();
       System.err.println(filePath);
     }
   }
 
   private void saveCodeArea(String filePath) {
     try (PrintWriter writer = new PrintWriter(new File(filePath))) {
-      writer.println(editor.getText());
-    } catch (FileNotFoundException e) {
-      e.printStackTrace();
+      if (filePath.endsWith(".java") || filePath.endsWith(".md")) {
+        writer.println(editor.getText());
+      } else {
+        throw new FileNotFoundException();
+      }
+
+    } catch (FileNotFoundException ex) {
+      Alert error = new Alert(AlertType.ERROR);
+      error.setContentText("Could not save file!\nMust be a java or md file. Try again.");
+
+      error.showAndWait();
+      System.err.println(filePath);
     }
   }
 

src/main/java/app/controllers/MenubarController.java

@@ -66,12 +66,22 @@ public class MenubarController implements Initializable, Controller {
   /* ------------------------------------------------------------------------ */
   @FXML
   private void handleNewFile() {
-
+    Model.setActiveFilePath(null);
+    this.eventBus.post(new FileSelectedEvent(null));
   }
 
-  @FXML
+  @FXML // temp solution
   private void handleNewFolder() {
 
+    // File chosenLocation = fc.showDialog(stage);
+
+    // if (chosenLocation != null) {
+    // chosenLocation.mkdir();
+    // Model.setActiveFilePath(null);
+    // this.eventBus.post(new FileSelectedEvent(null));
+    // this.eventBus.post(new OpenProjectEvent(chosenLocation.toString()));
+    // }
+
   }
 
   /* ------------------------------------------------------------------------ */