RemoveStaffSupA.java

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.JTextArea;

public class RemoveStaffSupA extends JFrame {
	private String type,depa;
	private JPanel contentPane;
	private JTextField textField;
	private JTextField textField_1;

	/**
	 * Launch the application.
	 */
	
	/**
	 * Create the frame.
	 */
	public RemoveStaffSupA() {
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		JLabel lblDeleteStaff = new JLabel("Delete Staff / Supervisors");
		lblDeleteStaff.setBounds(150, 11, 150, 40);
		contentPane.add(lblDeleteStaff);
		
		JLabel lblStaffName = new JLabel("Staff / Supervisor Name:");
		lblStaffName.setBounds(43, 78, 119, 14);
		contentPane.add(lblStaffName);
		
		JLabel lblEnterReasonFor = new JLabel("Enter Reason for Deletion:");
		lblEnterReasonFor.setBounds(43, 124, 156, 14);
		contentPane.add(lblEnterReasonFor);
		
		JLabel labelErr = new JLabel("");
		labelErr.setBounds(116, 169, 248, 14);
		contentPane.add(labelErr);
		

		textField = new JTextField();
		textField.setBounds(234, 75, 86, 20);
		contentPane.add(textField);
		textField.setColumns(10);
		
		textField_1 = new JTextField();
		textField_1.setBounds(234, 121, 86, 20);
		contentPane.add(textField_1);
		textField_1.setColumns(10);
		
		JButton btnDelete = new JButton("Delete!");
		btnDelete.setBounds(180, 201, 89, 23);
		btnDelete.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				  if (textField.getText()==""||textField.getText()=="")
				  {
					  labelErr.setText("All fields are mandatory.");
				  }
				  else
				  {
					  InputStream in;
						try {
							int i=0;
							in = new FileInputStream("User_Password.txt");
							Scanner sc=new Scanner(in);
							String x = sc.nextLine();
							while(sc.hasNextLine())
							{
								x = sc.nextLine();
								String split[] = x.split(",");
								if(split[0].equals(textField.getText()))	
									{
									type=split[2];
									depa=split[3];
									updateUserPasswordFile(split[0]);		//Facade pattern
									updateStaffSupFile(split[0]);
						            dispose();
									//updateSupFile(split[0]);
									break;
									}
							}
							
						} catch (FileNotFoundException ee) {
							// TODO Auto-generated catch block
							ee.printStackTrace();
						}
				  }
			}

			private void updateStaffSupFile(String username) {
				// TODO Auto-generated method stub
				if (type.equals("Staff"))
				{
					InputStream in;
					try {
						System.out.println("Writing user.password file");
						in = new FileInputStream(depa+"Staff.csv");
						StringBuilder sb=new StringBuilder();
						Scanner sc=new Scanner(in);
						while (sc.hasNextLine())
						{
							String x=sc.nextLine();
							String split2[] = x.split(",");
							if (split2[0].equals(username))
								continue;
							else
								sb.append("\r\n"+x);
							
							System.out.println(split2[0]+" "+username);
						}
						in.close();
						FileWriter fileWriter1 = new FileWriter(depa+"Staff.csv",false);
			            fileWriter1.write(sb.toString());
			            fileWriter1.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
				}
				else if (type.equals("Supervisor"))
				{
					InputStream in2;
					try {
						System.out.println("Writing supervisor file");
						in2 = new FileInputStream("Supervisor.csv");
						StringBuilder sb=new StringBuilder();
						Scanner sc=new Scanner(in2);
						int i=0;
						while (sc.hasNextLine())
						{
							String x=sc.nextLine();
							String split2[] = x.split(",");
							if (split2[0].equals(username))
								continue;
							else 
							{
								if (i==0)
									sb.append(x);
								else
									sb.append("\r\n"+x);
								i++;
							}
							System.out.println(split2[0]+" "+username);
						}
						in2.close();
						FileWriter fileWriter3 = new FileWriter("Supervisor.csv",false);
			            fileWriter3.write(sb.toString());
			            fileWriter3.close();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
				}
			}

			private void updateUserPasswordFile(String username) {
				// TODO Auto-generated method stub
				InputStream in;
				try {
					System.out.println("Writing user.password file...");
					in = new FileInputStream("User_Password.txt");
					StringBuilder sb=new StringBuilder();
					Scanner sc=new Scanner(in);
					while (sc.hasNextLine())
					{
						String x=sc.nextLine();
						String split1[] = x.split(",");
						if (split1[0].equals(username))
							continue;
						else
							sb.append("\r\n"+x);
						System.out.println(split1[0]+" "+username);

					}
					in.close();
					FileWriter fileWriter1 = new FileWriter("User_Password.txt",false);
		            fileWriter1.write(sb.toString());
		            fileWriter1.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		});
		contentPane.add(btnDelete);
		
	}
}