EmployeeGUI.java

package labwork.employeerecordgui;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/**
 *
 * @author Omar
 */
public class EmployeeGUI {

    private JFrame updateFrame;

    public EmployeeGUI() {
        JFrame frame = new JFrame("Employee Record Management System");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(750, 500);

        DefaultListModel<Employee> employeeListModel = new DefaultListModel<>();
        JList<Employee> employeeList = new JList<>(employeeListModel);
        JScrollPane employeeScrollPane = new JScrollPane(employeeList);

        JPanel fieldsPanel = new JPanel();
        fieldsPanel.setLayout(new GridLayout(7, 1)); // Grid layout for text fields

        // Text Fields with titled borders
        JTextField nameField = new JTextField(15);
        nameField.setBorder(BorderFactory.createTitledBorder("Employee Name"));
        JTextField idField = new JTextField(15);
        idField.setBorder(BorderFactory.createTitledBorder("Employee ID"));
        JTextField firstDayOfWorkField = new JTextField(15);
        firstDayOfWorkField.setBorder(BorderFactory.createTitledBorder("First Day of Work"));
        JTextField phoneNumberField = new JTextField(15);
        phoneNumberField.setBorder(BorderFactory.createTitledBorder("Phone Number"));
        JTextField addressField = new JTextField(15);
        addressField.setBorder(BorderFactory.createTitledBorder("Address"));
        JTextField workHoursField = new JTextField(15);
        workHoursField.setBorder(BorderFactory.createTitledBorder("Work Hours"));

        fieldsPanel.add(nameField);
        fieldsPanel.add(idField);
        fieldsPanel.add(firstDayOfWorkField);
        fieldsPanel.add(phoneNumberField);
        fieldsPanel.add(addressField);
        fieldsPanel.add(workHoursField);

        EmployeeNodeManager manager = new EmployeeNodeManager();

        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout());

        JButton insertButton = new JButton("Insert Record");
        JButton deleteButton = new JButton("Delete Record");
        JButton updateButton = new JButton("Update Record");
        JButton showButton = new JButton("Show Details");
        JButton searchButton = new JButton("Search Employee");
        JButton updateSalaryButton = new JButton("Update Salary");

        buttonPanel.add(insertButton);
        buttonPanel.add(deleteButton);
        buttonPanel.add(updateButton);
        buttonPanel.add(showButton);
        buttonPanel.add(searchButton);
        buttonPanel.add(updateSalaryButton);

        insertButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String name = nameField.getText();
                int id = Integer.parseInt(idField.getText());
                String firstDayOfWork = firstDayOfWorkField.getText();
                String phoneNumber = phoneNumberField.getText();
                String address = addressField.getText();
                int workHours = Integer.parseInt(workHoursField.getText());
                Employee employee = new Employee(name, id, firstDayOfWork, phoneNumber, address, workHours);
                manager.insertEmployeeRecord(employee);
                employeeListModel.addElement(employee); // Add the employee to the list model
            }
        });

        deleteButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int id = Integer.parseInt(idField.getText());
                int result = manager.deleteEmployeeRecord(id);
                if (result == -1) {
                    JOptionPane.showMessageDialog(frame, "Record not found.");
                } else {
                    for (int i = 0; i < employeeListModel.size(); i++) {
                        if (employeeListModel.getElementAt(i).id == id) {
                            employeeListModel.remove(i);
                            break;
                        }
                    }
                }
            }
        });

        updateButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int id = Integer.parseInt(idField.getText());
                Node employeeNodeToUpdate = manager.searchEmployeeNode(id);
                Employee employeeToUpdate = employeeNodeToUpdate != null ? employeeNodeToUpdate.data : null;

                if (employeeToUpdate != null) {
                    // Create the update frame
                    updateFrame = new JFrame("Update Employee Information");
                    updateFrame.setSize(300, 200);
                    updateFrame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

                    JPanel updatePanel = new JPanel();
                    updatePanel.setLayout(new GridLayout(4, 1)); // Grid layout for text fields

                    // Text Fields with titled borders
                    JTextField phoneNumberUpdateField = new JTextField(15);
                    phoneNumberUpdateField.setBorder(BorderFactory.createTitledBorder("Phone Number"));
                    JTextField addressUpdateField = new JTextField(15);
                    addressUpdateField.setBorder(BorderFactory.createTitledBorder("Address"));
                    JTextField firstDayOfWorkUpdateField = new JTextField(15);
                    firstDayOfWorkUpdateField.setBorder(BorderFactory.createTitledBorder("First Day of Work"));

                    updatePanel.add(phoneNumberUpdateField);
                    updatePanel.add(addressUpdateField);
                    updatePanel.add(firstDayOfWorkUpdateField);

                    JButton updateInfoButton = new JButton("Update");
                    updatePanel.add(updateInfoButton);

                    updateFrame.getContentPane().add(updatePanel);
                    updateFrame.setLocationRelativeTo(null);
                    updateFrame.setVisible(true);

                    updateInfoButton.addActionListener(new ActionListener() {
                        @Override
                        public void actionPerformed(ActionEvent e) {
                            // Update the employee information
                            String phoneNumber = phoneNumberUpdateField.getText();
                            String address = addressUpdateField.getText();
                            String firstDayOfWork = firstDayOfWorkUpdateField.getText();

                            // Update the employee information
                            employeeToUpdate.phoneNumber = phoneNumber;
                            employeeToUpdate.address = address;
                            employeeToUpdate.firstDayOfWork = firstDayOfWork;

                            // Close the update frame
                            updateFrame.dispose();
                        }
                    });
                } else {
                    JOptionPane.showMessageDialog(frame, "Employee not found.");
                }
            }
        });

        showButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int id = Integer.parseInt(idField.getText());
                String result = manager.showEmployeeDetails(id);
                if (result != null) {
                    JOptionPane.showMessageDialog(frame, result);
                } else {
                    JOptionPane.showMessageDialog(frame, "Record not found.");
                }
            }
        });

        searchButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int id = Integer.parseInt(idField.getText());
                int searchResult = manager.searchEmployee(id);
                if (searchResult == -1) {
                    JOptionPane.showMessageDialog(frame, "Employee not found.");
                } else {
                    String originalMessage = "Employee found with ID: " + searchResult; // Replace with your actual original message
                    String employeeDetails = manager.showEmployeeDetails(id);
                    if (employeeDetails != null) {
                        String messageWithDetails = originalMessage + "\n\n" + employeeDetails;
                        JOptionPane.showMessageDialog(frame, messageWithDetails);
                    } else {
                        JOptionPane.showMessageDialog(frame, "Employee details not found.");
                    }
                }
            }
        });

        updateSalaryButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int id = Integer.parseInt(idField.getText());
                int extraHours = Integer.parseInt(JOptionPane.showInputDialog("Enter extra work hours:"));
                manager.updateSalary(id, extraHours);
                employeeList.updateUI();
            }
        });

        frame.getContentPane().add(BorderLayout.NORTH, employeeScrollPane);
        frame.getContentPane().add(BorderLayout.CENTER, fieldsPanel);
        frame.getContentPane().add(BorderLayout.SOUTH, buttonPanel);

        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}