ForgetPassword.java

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.*;
import java.util.logging.Logger;

public class ForgetPassword extends Functions{
    private String userID;
    private String email;
    private String username;
    private String OTP;
    private String userRecord = "Data/UserRecordTest.txt";
    private String studentsRecord = "Data/student_information.txt";
    private String Filename;
    private final Logger logger = Logger.getLogger(ForgetPassword.class.getName());



    public ForgetPassword(String userID, String email) {
        this.userID = userID;
        this.email = email;
    }

    public boolean checkIDExists() {
        boolean IDexists = false;
        
        if (userID.startsWith("AO") || userID.startsWith("CA")) {
            Filename = userRecord;
        } else {
            Filename = studentsRecord;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(Filename))) {
            String line;
            reader.readLine();

            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(";");
                if (userID.equals(parts[0])) {
                    IDexists = true;
                    break;
                }
            }
        } catch (IOException e) {
            logger.severe("An error occurred: " + e.getMessage());
        }

        getUsername();
        return IDexists;
    }

    public boolean MatchEmail() {
        boolean MatchEmail = false;

        if (userID.startsWith("AO") || userID.startsWith("CA")) {
            Filename = userRecord;
        } else {
            Filename = studentsRecord;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(Filename))) {
            String line;
            reader.readLine();

            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(";");
                if (userID.equals(parts[0]) && email.equals(parts[5])) {
                    MatchEmail = true;
                    break;
                }
            }
        } catch (IOException e) {
            logger.severe("An error occurred: " + e.getMessage());
        }
        return MatchEmail;
    }

    public String getUsername() {
        if (userID.startsWith("AO") || userID.startsWith("CA")) {
            Filename = userRecord;
        } else {
            Filename = studentsRecord;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(Filename))) {
            String line;
            reader.readLine();

            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(";");
                if (userID.equals(parts[0])) {
                    username = parts[1];
                    break;
                }
            }
        } catch (IOException e) {
            logger.severe("An error occurred: " + e.getMessage());
        }

        logger.info("Username retrieved: " + username);
        return username;
    }

    public void generateOTP (String userID, String email) {
        Random rand = new Random();
        int otpInt = 100000 + rand.nextInt(900000);
        OTP = String.valueOf(otpInt);
        String AOsenderEmail = "apuacademicofficer@gmail.com";
        String AOsenderPassword = "lrsy tzjy awsp pyeh";
        String CAsenderEmail = "apucourseofficer@gmail.com";
        String CAsenderPassword = "ibwt iswy stvo wrbm";

        try {
            sendEmail(
                userID.startsWith("AO") ? AOsenderEmail : CAsenderEmail,
                userID.startsWith("AO") ? AOsenderPassword : CAsenderPassword,
                email,
                "OTP Code for Reset Password - APU Course Recovery System",
                "Dear " + username + ",\n\n"
                + "We received a request to reset your password for the APU Course Recovery System account associated with this email.\n\n"
                + "Your One-Time Password (OTP) is: " + OTP + "\n\n"
                + "Please enter this code on the verification page to continue.\n"
                + "Notes: This code will expire in 5 minutes for security reasons.\n\n"
                + "If you did not request this, please ignore this email.\n\n"
                + "Best regards,\n" 
                + (userID.startsWith("AO") ? "APU Academic Officer Team" : "APU Course Admin Team")
            );

        } catch (FileNotFoundException e) {
            logger.severe("Email template file not found: " + e.getMessage());
            e.printStackTrace();
        } catch (Exception e) {
            logger.severe("Error sending OTP email: " + e.getMessage());
        }

        logger.info("OTP sent to email: " + email);
    }

    public boolean verifyOTP(String inputOTP) {
        return OTP != null && OTP.equals(inputOTP);
    }

    public void ClearOTP() {
        OTP = null;
        logger.info("OTP cleared.");
    }

    public void resetPassword(String newPassword) {
        StringBuilder fileContent = new StringBuilder();

        if (userID.startsWith("AO") || userID.startsWith("CA")) {
            Filename = userRecord;
        } else {
            Filename = studentsRecord;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(Filename))) {
            String line;
            fileContent.append(reader.readLine()).append("\n");

            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(";");
                if (userID.equals(parts[0])) {
                    parts[2] = newPassword;
                    line = String.join(";", parts);
                }
                fileContent.append(line).append("\n");
            }
        } catch (IOException e) {
            logger.severe("An error occurred while reading the file: " + e.getMessage());
            return;
        }

        try (BufferedWriter writer = new BufferedWriter(new FileWriter(Filename))) {
            writer.write(fileContent.toString());
        } catch (IOException e) {
            logger.severe("An error occurred while writing to the file: " + e.getMessage());
        }

        logger.info("Password reset successfully for user ID: " + userID);
    }
}