Added CRUD to Suppliers

src/main/java/org/example/petshopdesktop/controllers/ProductController.java

@@ -62,6 +62,9 @@ public class ProductController {
      */
     @FXML
     void initialize() {
+        //Disable buttons until a row is selected
+        btnEdit.setDisable(true);
+        btnDelete.setDisable(true);
         //set up table columns
         colProductId.setCellValueFactory(new PropertyValueFactory<ProductDTO,Integer>("prodId"));
         colProductName.setCellValueFactory(new PropertyValueFactory<ProductDTO,String>("prodName"));

src/main/java/org/example/petshopdesktop/controllers/SupplierController.java

@@ -4,15 +4,20 @@ import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
-import javafx.scene.control.Button;
-import javafx.scene.control.TableColumn;
-import javafx.scene.control.TableView;
-import javafx.scene.control.TextField;
+import javafx.fxml.FXMLLoader;
+import javafx.scene.Scene;
+import javafx.scene.control.*;
 import javafx.scene.control.cell.PropertyValueFactory;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import org.example.petshopdesktop.controllers.dialogcontrollers.SupplierDialogController;
 import org.example.petshopdesktop.database.SupplierDB;
 import org.example.petshopdesktop.models.Supplier;
 
+import java.io.IOException;
 import java.sql.SQLException;
+import java.sql.SQLIntegrityConstraintViolationException;
+import java.util.Optional;
 
 /**
  * The controller for any operations in the supplier view
@@ -50,12 +55,17 @@ public class SupplierController {
     private TextField txtSearch;
 
     private ObservableList<Supplier> data = FXCollections.observableArrayList();
+    private String mode = null;
 
     /**
      * Set up the table view for suppliers and display it when starting up
      */
     @FXML
     void initialize(){
+        //Disable buttons until a row is selected
+        btnEdit.setDisable(true);
+        btnDelete.setDisable(true);
+        //set columns for table view
         colSupplierId.setCellValueFactory(new PropertyValueFactory<Supplier, Integer>("supId"));
         colSupplierName.setCellValueFactory(new PropertyValueFactory<Supplier, String>("supCompany"));
         colContactPerson.setCellValueFactory(new PropertyValueFactory<Supplier, String>("supFullName"));
@@ -64,6 +74,15 @@ public class SupplierController {
 
         displaySupplier();
 
+        // Enable buttons when a row is selected
+        tvSuppliers.getSelectionModel().selectedItemProperty().addListener(
+                (observable, oldValue, newValue) -> {
+                    btnEdit.setDisable(false);
+                    btnDelete.setDisable(false);
+                }
+        );
+
+
     }
 
     /**
@@ -82,19 +101,124 @@ public class SupplierController {
     }
 
 
+    /**
+     * open a new dialog for adding a supplier
+     * @param event
+     */
     @FXML
     void btnAddClicked(ActionEvent event) {
-
+        mode = "Add";
+        openDialog(null,mode);
     }
 
+    /**
+     *
+     * @param event
+     */
     @FXML
     void btnDeleteClicked(ActionEvent event) {
+        int numRows = 0;
+        //set selected supplier
+        Supplier selectedSupplier = tvSuppliers.getSelectionModel().getSelectedItem();
 
+        //ask user to confirm
+        Alert question = new Alert(Alert.AlertType.CONFIRMATION);
+        question.setHeaderText("Please confirm delete");
+        question.setContentText("Are you sure you want to delete this supplier?");
+        Optional<ButtonType> result = question.showAndWait(); //show alert and wait for response
+
+        //if confirmed, start deletion
+        if (result.isPresent() && result.get() == ButtonType.OK){
+            int supId = selectedSupplier.getSupId();
+
+            //Try deleting supplier
+            try{
+                numRows = SupplierDB.deleteSupplier(supId);
+            }
+            catch (SQLIntegrityConstraintViolationException e){
+                Alert alert = new Alert(Alert.AlertType.ERROR);
+                alert.setHeaderText("Database Operation Error");
+                alert.setContentText("Delete failed\n" +
+                        "the selected supplier is being referred in another table");
+                alert.showAndWait();
+                return;
+            }
+            catch (SQLException e) {
+                throw new RuntimeException(e);
+            }
+
+            //prompt user of any errors
+            if (numRows == 0){
+                Alert alert = new Alert(Alert.AlertType.ERROR);
+                alert.setHeaderText("Database Operation Error");
+                alert.setContentText("Delete failed");
+                alert.showAndWait();
+            }
+            else{
+                //prompt user of delete conformation
+                Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
+                alert.setHeaderText("Database Operation Confirmed");
+                alert.setContentText("Delete successful");
+                alert.showAndWait();
+                //refresh display
+                displaySupplier();
+            }
+        }
     }
 
+    /**
+     * Open a new dialog for editing a supplier
+     * @param event click event
+     */
     @FXML
     void btnEditClicked(ActionEvent event) {
+        //set selected supplier
+        Supplier selectedSupplier = tvSuppliers.getSelectionModel().getSelectedItem();
 
+        if (selectedSupplier != null) {
+            mode = "Edit";
+            openDialog(selectedSupplier, mode);
+        }
+    }
+
+    /**
+     * Function to open the new Dialog for edit or adding
+     * depending on the mode given
+     * @param supplier the supplier entity fo editing, null if adding
+     * @param mode the mode the dialog should be in
+     */
+    private void openDialog(Supplier supplier, String mode){
+        //Get new view
+        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/org/example/petshopdesktop/dialogviews/supplier-dialog-view.fxml")); //CHECK
+        Scene scene = null;
+        try{
+            scene = new Scene(fxmlLoader.load());
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+        SupplierDialogController dialogController = fxmlLoader.getController(); //controller associated with this view
+        dialogController.setMode(mode);
+
+        //Open the dialog depending on the mode
+        if(mode.equals("Edit")){
+            //Make it display suppliers details in dialog
+            dialogController.displaySupplierDetails(supplier);
+        }
+        Stage dialogStage = new Stage();
+        dialogStage.initModality(Modality.APPLICATION_MODAL); //make it modal
+        if(mode.equals("Add")){
+            dialogStage.setTitle("Add Supplier");
+        }
+        else {
+            dialogStage.setTitle("Edit Supplier");
+        }
+        dialogStage.setScene(scene);
+        dialogStage.showAndWait();
+
+        //When dialog closes update table view and disable edit and delete buttons
+        displaySupplier();
+        btnDelete.setDisable(true);
+        btnEdit.setDisable(true);
     }
 
 }

src/main/java/org/example/petshopdesktop/controllers/dialogcontrollers/SupplierDialogController.java

@@ -1,5 +1,178 @@
 package org.example.petshopdesktop.controllers.dialogcontrollers;
 
+import javafx.event.EventHandler;
+import javafx.fxml.FXML;
+import javafx.scene.Node;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.Label;
+import javafx.scene.control.TextField;
+import javafx.scene.input.MouseEvent;
+import javafx.stage.Stage;
+import org.example.petshopdesktop.database.SupplierDB;
+import org.example.petshopdesktop.models.Supplier;
+
+import java.sql.SQLException;
+
 public class SupplierDialogController {
 
+    @FXML
+    private Button btnCancel;
+
+    @FXML
+    private Button btnSave;
+
+    @FXML
+    private Label lblMode;
+
+    @FXML
+    private Label lblSupId;
+
+    @FXML
+    private TextField txtCompanyName;
+
+    @FXML
+    private TextField txtContactFirstName;
+
+    @FXML
+    private TextField txtContactLastName;
+
+    @FXML
+    private TextField txtEmail;
+
+    @FXML
+    private TextField txtPhone;
+
+    private String mode = null;
+
+    @FXML
+    void initialize() {
+        //Set up mouse handlers for buttons
+        btnSave.setOnMouseClicked(new EventHandler<MouseEvent>() {
+            @Override
+            public void handle(MouseEvent mouseEvent) {
+                buttonSaveClicked(mouseEvent);
+            }
+        });
+
+        btnCancel.setOnMouseClicked(new EventHandler<MouseEvent>() {
+            @Override
+            public void handle(MouseEvent mouseEvent) {
+                closeStage(mouseEvent);
+            }
+        });
+    }
+
+    private void buttonSaveClicked(MouseEvent mouseEvent) {
+        int numRow = 0; //how many rows affected
+        String errorMsg = ""; //error message for validation
+
+        //TODO: Import validation class and validate text fields here
+
+        if(errorMsg.isEmpty()){ //no validation errors detected
+            Supplier supplier = collectSupplier(); //get supplier info
+            if (mode.equals("Add")) { //add mode
+                try{
+                    numRow = SupplierDB.insertSupplier(supplier);
+                } catch (SQLException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+            else{ //edit mode
+                try{
+                    numRow = SupplierDB.updateSupplier(supplier.getSupId(),supplier);
+                } catch (SQLException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+
+            //if no rows were affected then there was an error (prompt user of error)
+            if (numRow == 0){
+                Alert alert = new Alert(Alert.AlertType.ERROR);
+                alert.setHeaderText("Database Operation Error");
+                alert.setContentText(mode + " failed");
+                alert.showAndWait();
+                closeStage(mouseEvent);
+            }
+            else {
+                //tell the user operation was successful
+                Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
+                alert.setHeaderText("Database Operation Confirmed");
+                alert.setContentText(mode + " succeeded");
+                alert.showAndWait();
+                closeStage(mouseEvent);
+            }
+        }
+        else{ //Display validation errors
+            Alert alert = new Alert(Alert.AlertType.ERROR);
+            alert.setHeaderText("Input Error");
+            alert.setContentText(errorMsg);
+            alert.showAndWait();
+        }
+    }
+
+    /**
+     * Close the window
+     * @param mouseEvent mouse event to close
+     */
+    private void closeStage(MouseEvent mouseEvent) {
+        Node node = (Node) mouseEvent.getSource();
+        Stage stage = (Stage) node.getScene().getWindow();
+        stage.close();
+    }
+
+    /**
+     * Collect the supplier info
+     * @return supplier info with the id or the new supplier
+     */
+    private Supplier collectSupplier(){
+        int supId = 0;
+        Supplier supplier = null;
+
+        if(lblSupId.isVisible()){ //Edit mode
+            //get supplier id from lblId (split the string so we only get the int)
+            supId = Integer.parseInt(lblSupId.getText().split(": ")[1]);
+        }
+        supplier = new Supplier(
+                supId,
+                txtCompanyName.getText(),
+                txtContactFirstName.getText(),
+                txtContactLastName.getText(),
+                txtEmail.getText(),
+                txtPhone.getText()
+        );
+        return supplier;
+    }
+
+    /**
+     * Display the supplier data in text fields
+     * @param supplier the supplier entity containing data to display
+     */
+    public void displaySupplierDetails(Supplier supplier){
+        if (supplier!=null){
+            lblSupId.setText("ID: " + supplier.getSupId());
+            txtCompanyName.setText(supplier.getSupCompany());
+            txtContactFirstName.setText(supplier.getSupContactFirstName());
+            txtContactLastName.setText(supplier.getSupContactLastName());
+            txtEmail.setText(supplier.getSupEmail());
+            txtPhone.setText(supplier.getSupPhone());
+        }
+    }
+
+
+    /**
+     * Set the mode of the dialog
+     * @param mode the mode to for the dialog
+     */
+    public void setMode(String mode) {
+        this.mode = mode;
+        lblMode.setText(mode + " Supplier");
+        if(mode.equals("Add")) {
+            lblSupId.setVisible(false);
+        }
+        else if(mode.equals("Edit")) {
+            lblSupId.setVisible(true);
+        }
+    }
+
 }

src/main/java/org/example/petshopdesktop/database/SupplierDB.java

@@ -5,10 +5,7 @@ import javafx.collections.ObservableList;
 import org.example.petshopdesktop.models.Product;
 import org.example.petshopdesktop.models.Supplier;
 
-import java.sql.Connection;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Statement;
+import java.sql.*;
 
 /**
  * A class containing all the methods relating to CRUD on Suppliers table
@@ -44,4 +41,90 @@ public class SupplierDB {
         conn.close();
         return suppliers;
     }
+
+    /**
+     * Inserts a new supplier to the database
+     * @param supplier supplier entity to be inserted
+     * @return number of rows affected in the database
+     * @throws SQLException if insertion failed
+     */
+    public static int insertSupplier(Supplier supplier) throws SQLException {
+        int numRows = 0;
+
+        Connection conn = ConnectionDB.getConnection();
+        String sql = "INSERT INTO supplier (supId, supCompany, supContactFirstName, supContactLastName, supEmail, supPhone)" +
+                "VALUES (?, ?, ?, ?, ?, ?)";
+
+        //These are the values from supplier to put into the query above
+        PreparedStatement stmt = conn.prepareStatement(sql);
+        stmt.setInt(1, supplier.getSupId());
+        stmt.setString(2, supplier.getSupCompany());
+        stmt.setString(3, supplier.getSupContactFirstName());
+        stmt.setString(4, supplier.getSupContactLastName());
+        stmt.setString(5, supplier.getSupEmail());
+        stmt.setString(6, supplier.getSupPhone());
+
+        //update the number of rows affected, return and close connection
+        numRows = stmt.executeUpdate();
+        conn.close();
+
+        return numRows;
+    }
+
+    /**
+     * Update an existing supplier to the database
+     * @param supId id of supplier
+     * @param supplier new supplier data
+     * @return number of rows affected in the database
+     * @throws SQLException if update failed
+     */
+    public static int updateSupplier(int supId, Supplier supplier) throws SQLException {
+        int numRows = 0;
+
+        Connection conn = ConnectionDB.getConnection();
+        String sql = "UPDATE supplier SET " +
+                " supCompany = ?, " +
+                " supContactFirstName = ?, " +
+                " supContactLastName = ?, " +
+                " supEmail = ?, " +
+                " supPhone = ? " +
+                " WHERE supId = ?";
+
+        //updated values to update the supplier with the query above
+        PreparedStatement stmt = conn.prepareStatement(sql);
+        stmt.setString(1, supplier.getSupCompany());
+        stmt.setString(2, supplier.getSupContactFirstName());
+        stmt.setString(3, supplier.getSupContactLastName());
+        stmt.setString(4, supplier.getSupEmail());
+        stmt.setString(5, supplier.getSupPhone());
+        stmt.setInt(6, supId);
+
+        //Update the rows and close connection
+        numRows = stmt.executeUpdate();
+        conn.close();
+
+        return numRows;
+    }
+
+    /**
+     * Delete a supplier form the database
+     * @param supId supplier id to be deleted
+     * @return number of rows affected in the database
+     * @throws SQLException if delete failed
+     */
+    public static int deleteSupplier(int supId) throws SQLException {
+        int numRows = 0;
+        Connection conn = ConnectionDB.getConnection();
+
+        String sql = "DELETE FROM supplier WHERE supId = ?";
+        PreparedStatement stmt = conn.prepareStatement(sql);
+        //The supplier id to be deleted for the query above
+        stmt.setInt(1, supId);
+
+        //close connection and update rows affected
+        numRows = stmt.executeUpdate();
+        conn.close();
+
+        return numRows;
+    }
 }