#18: Implementing Medication Modal with Validation

src/main/java/de/hitec/nhplus/medication/AllMedicationController.java

@@ -1,17 +1,24 @@
 package de.hitec.nhplus.medication;
 
+import java.io.IOException;
+import java.sql.SQLException;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import de.hitec.nhplus.Main;
 import de.hitec.nhplus.datastorage.DaoFactory;
 import de.hitec.nhplus.medication.database.MedicationDao;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
 import javafx.scene.control.TableColumn;
 import javafx.scene.control.TableView;
 import javafx.scene.control.cell.PropertyValueFactory;
-
-import java.sql.SQLException;
-import java.util.stream.Collectors;
+import javafx.scene.layout.BorderPane;
+import javafx.stage.Stage;
 
 /**
  * The controller for viewing all {@link Medication}s.
@@ -50,14 +57,20 @@ public class AllMedicationController {
         this.columnName.setCellValueFactory(new PropertyValueFactory<>("name"));
         this.columnManufacturer.setCellValueFactory(new PropertyValueFactory<>("manufacturer"));
         this.columnIngredient.setCellValueFactory(
-                cellData -> new SimpleStringProperty(
-                        cellData
-                                .getValue()
-                                .getIngredients()
-                                .stream()
-                                .map(ingredient -> ingredient.getName())
-                                .collect(Collectors.joining("\n"))
-                ));
+            cellData -> {
+                Medication medication = cellData.getValue();
+                List<Ingredient> ingredients = medication.getIngredients();
+                if(ingredients.isEmpty()){
+                    return new SimpleStringProperty("");
+                }
+
+                return new SimpleStringProperty(
+                        ingredients
+                        .stream()
+                        .map(ingredient -> ingredient.getName())
+                        .collect(Collectors.joining("\n"))
+                );
+            });
         this.columnPossibleSideEffects.setCellValueFactory(new PropertyValueFactory<>("possibleSideEffects"));
         this.columnAdministrationMethod.setCellValueFactory(new PropertyValueFactory<>("administrationMethod"));
         this.columnCurrentStock.setCellValueFactory(new PropertyValueFactory<>("currentStock"));
@@ -76,4 +89,36 @@ public class AllMedicationController {
             exception.printStackTrace();
         }
     }
+
+    public void createMedication(Medication medication) {
+        dao = DaoFactory.getInstance().createMedicationDAO();
+        try {
+            dao.create(medication);
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    @FXML
+    public void handleNewMedication() {
+        try {
+            FXMLLoader loader = new FXMLLoader(
+                Main.class.getResource("/de/hitec/nhplus/medication/MedicationModal.fxml")
+            );
+            BorderPane pane = loader.load();
+            Scene scene = new Scene(pane);
+            Stage stage = new Stage();
+
+            MedicationModalController controller = loader.getController();
+            controller.initialize(stage, this, null);
+
+            stage.setScene(scene);
+            stage.setTitle("NHPlus - Neues Medikament");
+            stage.setResizable(true);
+            stage.setAlwaysOnTop(true);
+            stage.showAndWait();
+        } catch (IOException exception) {
+            exception.printStackTrace();
+        }
+    }
 }

src/main/java/de/hitec/nhplus/medication/MedicationModalController.java

@@ -0,0 +1,118 @@
+package de.hitec.nhplus.medication;
+
+import javafx.beans.value.ChangeListener;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.fxml.FXML;
+import javafx.scene.control.Button;
+import javafx.scene.control.ListView;
+import javafx.scene.control.TextArea;
+import javafx.scene.control.TextField;
+import javafx.stage.Stage;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Predicate;
+
+import static de.hitec.nhplus.utils.Validator.*;
+
+public class MedicationModalController {
+
+    @FXML
+    public ListView<Ingredient> listViewIngredients;
+    @FXML
+    public TextField textFieldName;
+    @FXML
+    public TextField textFieldManufacturer;
+    @FXML
+    public TextField textFieldAdministrationMethod;
+    @FXML
+    public TextField textFieldCurrentStock;
+    @FXML
+    public TextArea textAreaPossibleSideEffects;
+    @FXML
+    public Button buttonSave;
+
+    private Stage stage;
+    private Medication medication;
+    private final ObservableList<Ingredient> ingredients = FXCollections.observableArrayList();
+    private AllMedicationController controller;
+
+    @FXML
+    public void initialize(Stage stage, AllMedicationController controller, Medication medication) {
+        this.stage = stage;
+        this.controller=controller;
+
+        if( medication != null){
+            this.medication =  medication;
+        }else {
+            this.medication = new Medication(
+                    "",
+                    "",
+                    new ArrayList<>(),
+                    "",
+                    "",
+                    0
+            );
+            this.buttonSave.setDisable(true);
+        }
+
+        listViewIngredients.setCellFactory(cellData -> new IngredientListCell());
+        listViewIngredients.setItems(ingredients);
+        showData();
+
+        ChangeListener<String> inputMedicationValidationListener = (observableValue, oldText, newText) -> {
+            boolean isValid = isValidMedicationName(textFieldName.getText())
+                    && isValidMedicationManufacturer(textFieldManufacturer.getText())
+                    && isValidMedicationAdministrationMethod(textFieldAdministrationMethod.getText())
+                    && isValidStock(textFieldCurrentStock.getText());
+
+            this.buttonSave.setDisable(!isValid);
+        };
+
+        this.textFieldName.textProperty().addListener(inputMedicationValidationListener);
+        this.textFieldManufacturer.textProperty().addListener(inputMedicationValidationListener);
+        this.textFieldAdministrationMethod.textProperty().addListener(inputMedicationValidationListener);
+        this.textFieldCurrentStock.textProperty().addListener(inputMedicationValidationListener);
+    }
+
+    private void showData(){
+        ingredients.setAll(medication.getIngredients());
+        textFieldName.setText(medication.getName());
+        textFieldManufacturer.setText(medication.getManufacturer());
+        textFieldAdministrationMethod.setText(medication.getAdministrationMethod());
+        textFieldCurrentStock.setText(String.valueOf(medication.getCurrentStock()));
+        textAreaPossibleSideEffects.setText(medication.getPossibleSideEffects());
+    }
+
+    @FXML
+    public void handleSave() {
+        this.medication.setName(textFieldName.getText());
+        this.medication.setManufacturer(textFieldManufacturer.getText());
+        this.medication.setAdministrationMethod(textFieldAdministrationMethod.getText());
+        this.medication.setCurrentStock(Integer.parseInt(textFieldCurrentStock.getText()));
+        this.medication.setPossibleSideEffects(textAreaPossibleSideEffects.getText());
+        this.medication.setIngredients(ingredients
+                .stream()
+                .map(Ingredient::getName)
+                .distinct()
+                .filter(Predicate.not(String::isEmpty))
+                .map(Ingredient::new)
+                .toList()
+        );
+
+        controller.createMedication(medication);
+        controller.readAllAndShowInTableView();
+        stage.close();
+    }
+
+    @FXML
+    public void handleCancel() {
+        stage.close();
+    }
+
+    @FXML
+    public void handleAddIngredient() {
+        ingredients.add(new Ingredient(""));
+    }
+}

src/main/java/de/hitec/nhplus/utils/Validator.java

@@ -148,4 +148,28 @@ public class Validator {
     public static boolean isValidRoomNumber(String text) {
         return !text.isBlank();
     }
+
+    public static boolean isValidMedicationName(String text) {
+        return !text.isBlank();
+    }
+
+    public static boolean isValidMedicationManufacturer(String text) {
+        return !text.isBlank();
+    }
+
+    public static boolean isValidMedicationAdministrationMethod(String text) {
+        return !text.isBlank();
+    }
+
+    public static boolean isValidStock(String text) {
+        if (text.isBlank()) {
+            return false;
+        }
+        try {
+            int stock = Integer.parseInt(text);
+            return stock >= 0;
+        } catch (Exception exception) {
+            return false;
+        }
+    }
 }

src/main/resources/de/hitec/nhplus/medication/AllMedicationView.fxml

@@ -66,6 +66,7 @@
                             fx:id="buttonAdd"
                             mnemonicParsing="false"
                             prefWidth="90.0"
+                            onAction="#handleNewMedication"
                             text="Hinzufügen"
                     />
                     <Button