Untitled

package v06f;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 *
 * @author kiet
 */
public class ManageProfile {

    ArrayList<Profile> profileList;
    Scanner sc = new Scanner(System.in);
    private static final String VALID_ID = "^(?!0000)\\d{4}$";

    /**
     * Class constructor.
     *
     */
    public ManageProfile() {
        this.profileList = new ArrayList<>();    //cap bo nho cho arrayList
    }

    /**
     * Method used to add a profile.
     *
     */
    public void addProfile() {
        System.out.println("-------------Add Profile------------");
        Profile pf = new Profile();     //create new profile     
        pf.setID(getInputID(sc, "Enter ID: "));
        pf.setName(getInputString(sc, "Enter name: "));
        pf.setYearOfRegistration(getInputInt(sc, "Enter year of registration: "));
        pf.setAddress(getInputString(sc, "Enter address: "));
        this.profileList.add(pf);       //add to array
        System.out.println("Add a successful profile ");

    }

    /**
     * method used to display the information of the profiles stored in the
     * array.
     *
     *
     */
    public void displayProfile() {
        if (this.profileList.isEmpty()) {     //check array already
            System.out.println("There are no profiles yet!");
            return;
        }

        System.out.println("ID      Name         Year Of Registration      Addres"); //8/20/8/25
        for (int i = 0; i < this.profileList.size(); ++i) {     //approve profile in arraylist
            Profile pf = this.profileList.get(i);
            pf.disPlayInfo();                               //show profile
        }
    }

    /**
     * method to load the file containing the profile information.
     *
     * @throws IOException
     * @throws ClassNotFoundException
     */
    public void loadFile() throws IOException, ClassNotFoundException {
        FileInputStream fis = new FileInputStream("data.txt"); //create file
        ObjectInputStream ois = new ObjectInputStream(fis);     // create read file
        this.profileList = (ArrayList<Profile>) ois.readObject();   //read file in array
        ois.close(); //  close ois
        fis.close();//  close ois

    }

    /**
     * save file.
     *
     * @throws IOException
     */
    public void saveFile() throws IOException {
        File f = new File("data.txt");
        FileOutputStream fos = new FileOutputStream(f);
        ObjectOutputStream oos = new ObjectOutputStream(fos);
        oos.writeObject(this.profileList);                   //write file
        System.out.println("Save file successfull!");
    }

    /**
     * create file check if file already
     *
     * @throws IOException
     * @throws java.lang.ClassNotFoundException
     */
    public void createFileOrLoad() throws IOException, ClassNotFoundException {
        File f = new File("data.txt");
        if (f.exists()) {

            loadFile();
            System.out.println("Load file successfull!");
        } else {

            FileOutputStream fos = new FileOutputStream(f);
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(this.profileList);
            System.out.println("create file successfull!");
        }
    }

    /**
     * check input integer.
     *
     * @param scanner
     * @param message
     * @return
     */
    public int getInputInt(Scanner scanner, String message) {
        Integer input = null;
        while (input == null) {
            try {
                input = Integer.parseInt(getInputString(scanner, message));  //convert string to integer
                if (input <= 1900) { // check input must greater 1900 
                    System.out.println("Error: Year of registration must be greater than 1900!");
                    input = null;
                }
            } catch (NumberFormatException e) {     //check if input character
                System.out.println("Error: Your input must be a number !");
            }
        }
        return input;
    }

    /**
     * check if id already exists.
     *
     * @param string
     * @return
     */
    public boolean checkID(String string) {
        for (int i = 0; i < this.profileList.size(); ++i) {
            Profile pf = this.profileList.get(i);
            if (string.equals(pf.getID())) {    //check xem ID already
                return true;
            }
        }
        return false;
    }

    /**
     * Input ID.
     *
     * @param scanner
     * @param message
     * @return
     */
    public String getInputID(Scanner scanner, String message) {
        String string = getInputString(scanner, message);
        while (!string.matches(VALID_ID)) {                              //must have 4 characters
            System.out.println("ID only allows input of 4 digits");
            string = getInputString(scanner, message);
        }
        while (checkID(string)) {                                   //check ID already exists!
            System.out.println("The ID already exists!");
            string = getInputString(scanner, message);
        }
        return string;
    }

    /**
     * Input String.
     *
     * @param scanner
     * @param message
     * @return
     */
    public String getInputString(Scanner scanner, String message) {
        String string;
        do {
            System.out.print(message);
            string = scanner.nextLine().trim();
            if (string.equals("")) {            //check empty
                System.out.println("Error: Your input can not be empty!");
            }
        } while (string.equals(""));    //if !empty
        return string;
    }

    /**
     * Input limit
     *
     * @return
     */
    public int checkInputIntLimit() {
        //loop until user input correct

        while (true) {
            try {
                int input = Integer.parseInt(sc.nextLine().trim());
                if (input < 0 || input > 3) {
                    throw new NumberFormatException();
                }
                return input;
            } catch (NumberFormatException e) {
                System.out.println("Please input number in rage [0-2]");
                System.out.print("Enter again: ");
            }
        }
    }
}