DigitalIdentityManagementSystem.java.java

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.regex.*;

public class DigitalIdentityManagementSystem {

    // User data storage
    private Map<String, UserData> userDataTable;

    // Authentication credential storage
    private Map<String, AuthenticationCredential> authCredentialTable;

    // Permissions management
    private Map<String, List<String>> resourcePermissions;

    public DigitalIdentityManagementSystem() {
        userDataTable = new HashMap<>();
        authCredentialTable = new HashMap<>();
        resourcePermissions = new HashMap<>();
    }

    //  sign up
    public void registerUser(String name, String email,  String phone, String password) {
        // Check if the user already exists
        if (userDataTable.containsKey(email)) {
            System.out.println("User already exists.");
            return;
        }
        UserData userData = new UserData(name, email, phone);

        // Store the user data in the user data table
        userDataTable.put(email, userData);
        // Hash the password and store the authentication credential in the auth-credential table

        AuthenticationCredential authCredential = new AuthenticationCredential(email, password);
        authCredentialTable.put(email, authCredential);
        System.out.println(name+" , you have registered successfully.");
    }

    // Log in an existing user
    public boolean login(String email, String password) {
        // Check if the user exists
        if (!userDataTable.containsKey(email)) {
            System.out.println("User does not exist.");
            return false;
        }
        // Retrieve the authentication credential from the auth credential table
        AuthenticationCredential authCredential = authCredentialTable.get(email);

        if (!(authCredential.getPassword()).equals(password)) {
            System.out.println("Invalid password.");
            return false;
        }

        System.out.println("Login successful.");
        return true;
    }

    // Grant access to a resource---give it to manager,ceo

    public void grantAccess(String email, String resourceName) {
        // Check if the user and resource exist
        if (!userDataTable.containsKey(email)) {
            System.out.println("User does not exist.");
            return;
        }
        if (!resourcePermissions.containsKey(resourceName)) {
            resourcePermissions.put(resourceName, new LinkedList<>());
        }


        // Add the user to the linked list of users who have permission to access the resource
        List<String> users = resourcePermissions.get(resourceName);
        if (!users.contains(email)) {
            users.add(email);
        }
        System.out.println("Access granted to " + resourceName + " for " + email);
    }

    private void permissons(String email){
        List<String>manager=new LinkedList<>();
        manager.add( "project Management");
        manager.add("grant-access");
        manager.add("Team management");
        manager.add("Resource allocation");////here we can call grant access
        manager.add("Technical expertise");

        List<String>CEO=new LinkedList<>();
        CEO.add("grant-access");
        CEO.add( "Strategic planning");
        CEO.add("Financial management");
        CEO.add("Human resources");
        CEO.add("Stakeholder management");
        CEO.add("Public relations");

        List<String>HR=new LinkedList<>();
        HR.add( "Recruitment and staffing");
        HR.add("Employee on-boarding and training");
        HR.add("Performance management and employee development");
        HR.add("Employee relations");
        HR.add("Workplace policies and procedures");

        List<String>projectLead=new LinkedList<>();
        projectLead.add( "Team Management");
        projectLead.add("Planning and Strategy");
        projectLead.add("Budgeting and Resource");
        projectLead.add("Reporting of project");


        List<String>softwareEngineer=new LinkedList<>();
        softwareEngineer.add( "Requirements gathering");
        softwareEngineer.add("Design software architecture");
        softwareEngineer.add("Development of program");
        softwareEngineer.add("Quality assurance");


        if(email.contains("manager")) {
            System.out.println("************ MANAGER SECTION ************");
            System.out.println("Manager has access to following resources  :\n");
            for(int i=0;i<manager.size();i++) {
                System.out.println((i+1)+"."+manager.get(i));
            }
        }

        else if(email.contains("ceo")) {
            System.out.println("************ CEO SECTION ************");
            System.out.println("CEO has access to following resources  :\n");
            for(int i=0;i<CEO.size();i++) {
                System.out.println((i+1)+"."+CEO.get(i));
            }
        }

        else if(email.contains("hr")) {
            System.out.println("************ HR SECTION ************");
            System.out.println("HR has access to following resources  :\n");
            for(int i=0;i<HR.size();i++) {
                System.out.println((i+1)+"."+HR.get(i));
            }
        }

        else if(email.contains("projectlead")) {
            System.out.println("************ PROJECT LEAD ************");
            System.out.println("ProjectLead has access to following resources  :\n");
            for(int i=0;i<projectLead.size();i++) {
                System.out.println((i+1)+"."+projectLead.get(i));
            }
        }

        else if(email.contains("sde")) {
            System.out.println("************ SDE SECTION ************");
            System.out.println("Software Engineer has access to following resources  :\n");
            for(int i=0;i<softwareEngineer.size();i++) {
                System.out.println((i+1)+"."+softwareEngineer.get(i));
            }
        }
        return;
    }

    // Main method
    public static void main(String[] args) {
        DigitalIdentityManagementSystem system = new DigitalIdentityManagementSystem();
        Scanner sc = new Scanner(System.in);
        int choice=0;
        while (choice!=3) {

            System.out.println("************ WELCOME TO PROBUILD SOFTWARE LIMITED COMPANY ************");
            System.out.println("\nEnter a command: \n1.sign in\n2.login\n3.exit");
            choice=sc.nextInt();
            switch(choice) {
                case 1:
                    System.out.println("************ SIGN IN ************");
                    System.out.println("enter your name");
                    String name=sc.next();
                    System.out.println("enter your phone number");
                    String phone =sc.next();
                    do{
                        if(phone.length()!=10) {
                            System.out.println("Invalid Phone number\nPlease enter valid Phone number");
                            phone =sc.next();
                        }
                    }while(phone.length()!=10);
                    System.out.println("enter your email");
                    String empemail=sc.next();
                    do {
                        if ((!empemail.contains("@") || !empemail.contains(".com")) || (!empemail.contains("manager") && !empemail.contains("hr") && !empemail.contains("ceo") && !empemail.contains("SDE") && !empemail.contains("projectlead"))) {
                            System.out.println("Invalid Email adrress\nPlease enter  valid  email address :");
                            empemail = sc.next();
                        }
                    }while((!empemail.contains("@") || !empemail.contains(".com")) || (!empemail.contains("manager") && !empemail.contains("hr") && !empemail.contains("ceo") && !empemail.contains("SDE") && !empemail.contains("projectlead")));

                    System.out.println("enter your password");
                    String emppassword=sc.next();
                    do{
                        if(emppassword.length()<4 || emppassword.length()>15) {
                            System.out.println("Invalid password\nPlease enter password having length between 4 to 15");
                            emppassword =sc.next();
                        }
                    }while(emppassword.length()<4 || emppassword.length()>15);
                    system.registerUser(name, empemail, phone, emppassword);
                    break;
                case 2:
                    System.out.println("************ LOG IN ************");
                    System.out.println("enter your email");
                    String email=sc.next();
                    System.out.println("enter your password");
                    String password=sc.next();
                    if(system.login(email,password)) {
                        system.permissons(email);
                    }
                    break;
                case 3:
                    System.out.println("Exiting...");
                    break;
                default:
                    break;
            }
        }
    }
}