UpdateMember.java

import java.util.*;
import java.io.*;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.regex.Pattern;

public class UpdateMember {
    static Scanner scn = new Scanner(System.in);

    public static void update(ArrayList<Member> memberList) {
        Member memberToUpdate = null;
        String inputId;

        Member last = memberList.get(memberList.size()-1);

        if(!last.getMemberID().equals("0")) {
            System.out.print("Enter the member ID to update: ");
            inputId = scn.nextLine().strip();
            memberToUpdate = null;
        } else {
            memberToUpdate = last;
            inputId = "0";
        }

        for(Member mem : memberList) {
            if(inputId.equals(mem.getMemberID())) {
                memberToUpdate = mem;
            }
        }

        if(memberToUpdate == null) {
            System.out.println("There was no member found with member ID " + inputId);
        } else {
            int id = Integer.parseInt(memberToUpdate.getMemberID());
            boolean newMember = false;
            boolean valid = false;

            File members = null;
            File checkouts = null;
            File temp = null;

            BufferedReader reader = null;
            BufferedWriter writer = null;
            BufferedWriter checkoutWriter = null;

            if(id == 0) {
                SaveToFile.save(memberToUpdate.toString(), "members.txt");
            }

            try {
                members = new File("members.txt");
                temp = new File("tempMem.txt");
                checkouts = new File("CheckedOutItems.txt");

                reader = new BufferedReader(new FileReader(members));
                writer = new BufferedWriter(new FileWriter(temp));
                checkoutWriter = new BufferedWriter(new FileWriter(checkouts, true));

                String curr;
                boolean found = false;
                String memberID = "0";
                String lastline = "";

                while ((curr = reader.readLine()) != null) {
                    String[] memberInfo = curr.split("\t");
                    int memID = Integer.parseInt(memberInfo[0].strip());
                    String email = memberInfo[4];
                    String origDob = memberInfo[3];
                    String address = memberInfo[2];
                    String memberType = memberInfo[6];
                    String name = memberInfo[1];
                    String ssn = memberInfo[5];
                    
                    Date dob = new Date(0);
                    boolean newDOB = false;
                    SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
                    boolean newID = false;

                    if (memberInfo.length >= 1 && memID == id && found == false) {
                        found = true;
                        // update member

                        if (id != 0 ) {
                            newMember = false;
                            System.out.println("\nCurrent Member Information: " + curr);
                            //System.out.print("\nWhat would you like to update? (Address, DOB, Email, Name, or Member Type): ");
                            
                            String change = inputChange(scn);

                            while(!isValidOption(change)) {
                                System.out.println("\nInvalid option. Please choose a valid option (address, dob, email, name, or member type):");
                                change = inputChange(scn);
                            }

                            switch (change.toLowerCase()) {
                                case "dob":
                                    newDOB = true;
                                    dob = inputDOB(scn, memberToUpdate);
                                    break;
                                case "address":
                                    address = inputAddress(scn, memberToUpdate);
                                    break;
                                case "email":
                                    email = inputEmail(scn, memberToUpdate);
                                    break;
                                case "member type":
                                    memberType = inputType(scn, memberToUpdate);
                                    break;
                                case "name":
                                    name = inputName(scn, memberToUpdate);
                                    break;
                            }
                        } else {
                            System.out.println("\nPlease enter all of the information below: ");
                            System.out.print("---------------------------------------------");
                            newMember = true;

                            address = inputAddress(scn, memberToUpdate);
                            email = inputEmail(scn, memberToUpdate);
                            name = inputName(scn, memberToUpdate);
                            newDOB = true;
                            dob = inputDOB(scn, memberToUpdate);
                            memberType = inputType(scn, memberToUpdate);
                            ssn = inputSSN(scn, memberToUpdate);

                            memberID = GetIDs.returnID("members.txt");
                            memberToUpdate.setMemberID(memberID);

                            String checkoutInfo = String.format("%s\t0\t0\t0\t0\t0\n", memberID);
                            checkoutWriter.write(checkoutInfo);
                        }

                        memberID = memberToUpdate.getMemberID();

                        String dobString;

                        if (newDOB == true) {
                            dobString = dateFormat.format(dob);
                        } else {
                            dobString = origDob;
                        }
                        String updatedInfo = String.format("%-10s\t%-20s\t%-30s\t%-12s\t%-30s\t%-10s\t%-10s\n", memberID, name, address, dobString, email, ssn, memberType);
                        // Write the updated line to the temp file
                        writer.write(updatedInfo);

                    } else {
                        // Write the original line to the temp file
                        if (memID != Integer.parseInt(memberID)) {
                            writer.write(curr);
                            writer.newLine();
                        }
                    }
                
                }
                if (!found) {
                    System.out.println("Member ID not found.");
                } else {
                    // Replace the original file with the updated temp file
                    System.out.println("Member information updated successfully.");
                }
            } catch (IOException e) {
                System.out.println("There was an error trying to update member " + id);
                e.printStackTrace();
            } finally {
                try {
                    reader.close();
                    writer.close();
                    checkoutWriter.close();
                    members.delete();
                    temp.renameTo(members);
                } catch (IOException e) {
                    System.out.println("There was an error trying to close the files.");
                    e.printStackTrace();
                }
            }
        }
    }

    private static int validID(Scanner scn) {
        int id = 0;
        boolean valid = false;

        while(!valid) {
            System.out.print("Enter member ID to edit: ");

            try {
                id = Integer.parseInt(scn.nextLine());
                valid = true;
            } catch (NumberFormatException e) {
                System.out.println("Invalid ID. Please enter an integer.\n");
            }
        }

        return id;
    }

    private static boolean isValidOption(String option) {
        return option.equalsIgnoreCase("Address") ||
                option.equalsIgnoreCase("DOB") ||
                option.equalsIgnoreCase("Email") ||
                option.equalsIgnoreCase("Member Type") ||
                option.equalsIgnoreCase("Name");
    }

    private static String inputAddress(Scanner scn, Member memberToUpdate) {
        String address;
        
        System.out.print("\nEnter new address: ");
        address = scn.nextLine();
        memberToUpdate.setAddress(address);

        return address;
    }   

    private static String inputEmail(Scanner scn, Member memberToUpdate) {
        String emailRegex = "^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+$";
        Pattern pattern = Pattern.compile(emailRegex);
        String email = "";
        boolean first = true;

        while(!pattern.matcher(email).matches()) {
            if(first == true) {
                System.out.print("\nEnter new email: ");
                first = false;
            } else {
                System.out.print("\nPlease input a valid email address: ");
            }
            email = scn.nextLine();
        }

        memberToUpdate.setEmail(email);
        
        return email;
    }

    private static String inputName(Scanner scn, Member memberToUpdate) {
        String name;

        System.out.print("\nEnter new name: ");
        name = scn.nextLine();
        memberToUpdate.setName(name);
        
        return name;
    }

    private static String inputSSN(Scanner scn, Member memberToUpdate) {
        String ssn;

        System.out.print("\nEnter new SSN: ");
        ssn = scn.nextLine();
        memberToUpdate.setSocialSecurityNumber(ssn);
        
        return ssn;
    }

    private static Date inputDOB(Scanner scn, Member memberToUpdate) {
        Date dob = new Date(0);
        SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");

        dateFormat.setLenient(false);
        boolean validDOB = false;

        while(validDOB != true) {
            try {
                System.out.print("\nEnter new Member Date of Birth(mm/dd/yyyy): ");
                String input = scn.nextLine();

                dob = dateFormat.parse(input);
                validDOB = true;
            } catch (ParseException e) {
                System.out.println("\nInvalid date format. Please enter date of birth in mm/dd/yyyy format.");
                continue;
            }
        }
        memberToUpdate.setDateOfBirth(dob);

        return dob;
    }

    private static String inputType(Scanner scn, Member memberToUpdate) {
        String memberType;

        while(true) {
            System.out.print("\nEnter new member type: ");
            memberType = scn.nextLine();

            if (memberType.equalsIgnoreCase("External") == false && memberType.equalsIgnoreCase("Student") == false && memberType.equalsIgnoreCase("Professor") == false) {
                System.out.println("Invalid member type. Please enter either external, student or professor.");
            } else {
                break;
            }
        }

        memberToUpdate.setMemberType(memberType);

        return memberType;
    }

    private static String inputChange(Scanner scn) {
        String change;

        System.out.print("\nWhat would you like to update? (Address, DOB, Email, Name, or Member Type): ");
        change = scn.nextLine();

        return change;
    }

    public static void closeScanner() {
        scn.close();
    }
}