anonymizer.js

let Account = (function() {
  function isValidPassword(userPassword, testPassword) {
    return userPassword === testPassword;
  }

  function getRandomLetterNumber() {
    let randomIndex = Math.floor(Math.random() * 62);
    return 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRTSUVWXYZ1234567890'[randomIndex];
  }

  function anonymize() {
    let result = '';

    for (let i = 0; i < 16; i += 1) {
      result += getRandomLetterNumber();
    }

    return result;
  }

  return {
    init: function(email, password, firstName, lastName) {
      this.userEmail = email;
      this.userPassword = password;
      this.userFirstName = firstName;
      this.userLastName = lastName;
      this.displayName = anonymize();
      return this;
    },

    reanonymize: function(password) {
      if (isValidPassword(this.userPassword, password)) {
        this.displayName = anonymize();
        return true
      } else {
        return 'Invalid Password';
      }
    },

    resetPassword: function(currentPassword, newPassword) {
      if (isValidPassword(this.userPassword, currentPassword)) {
        this.userPassword = newPassword;
        return true;
      } else {
        return 'Invalid Password';
      }
    },

    firstName: function(password) {
      if (isValidPassword(this.userPassword, password)) {
        return this.userFirstName;
      } else {
        return 'Invalid Password';
      }
    },

    lastName: function(password) {
      if (isValidPassword(this.userPassword, password)) {
        return this.userLastName;
      } else {
        return 'Invalid Password';
      }
    },

    email: function(password) {
      if (isValidPassword(this.userPassword, password)) {
        return this.userEmail;
      } else {
        return 'Invalid Password';
      }
    },
  };
})();


let fooBar = Object.create(Account).init('foo@bar.com', '123456', 'foo', 'bar');
console.log(fooBar.firstName);                     // returns the firstName function
console.log(fooBar.email);                         // returns the email function
console.log(fooBar.firstName('123456'));           // logs 'foo'
console.log(fooBar.firstName('abc'));              // logs 'Invalid Password'
console.log(fooBar.displayName);                   // logs 16 character sequence
console.log(fooBar.resetPassword('123', 'abc'))    // logs 'Invalid Password'
console.log(fooBar.resetPassword('123456', 'abc')) // logs true

let displayName = fooBar.displayName;
fooBar.reanonymize('abc');                         // returns true
console.log(displayName === fooBar.displayName);   // logs false

let bazQux = Object.create(Account).init('baz@qux.com', '123456', 'baz', 'qux');
console.log(bazQux.firstName('123456'));              // logs 'Invalid Password'
console.log(fooBar.email('abc'));                  // logs 'Invalid Password'