facebook_user.rb

class FacebookUser
  # DATA (instance variables)
  attr_reader :email, :friends, :photos
  attr_accessor :first_name, :last_name
  def initialize(email, password) # constructor
    @email = email
    @password = password

    @first_name = ""
    @last_name = ""

    @friends = []
    @photos = []
  end



  # BEHAVIOR (instance methods)

  def password
    return "*******"
  end

  def password_checker?(old_password)
    @password == old_password
  end

  def password_changer(new_password)
    @password = new_password
  end

  def to_s
   "name: #{first_name + " " + last_name} email: #{email} password: #{password} number of friends:#{friends.count} number of photos:#{photos.count}"
  end

  def add_photo(url)
    @photos << url
  end
end

interface.rb

 require_relative "facebook_user"

# SCENARIO 1 - Create a new user (+ FacebookUser#to_s)
  puts "welcome to facebook!"
  puts "---"

  puts "enter your email address"
  email = "arthur@lewagon.com"
  puts "---"

  puts "enter your password"
  password = "password"
  puts "---"

  first_user = FacebookUser.new(email, password)
  puts first_user
# SCENARIO 2 - Update details of user

  first_user.first_name = "Arthur"
  first_user.last_name = "Littmann"
  puts "---"
  puts first_user
# SCENARIO 3 - Add a new photo
  first_user.add_photo("url")

  puts "---"
  puts first_user


# SCENARIO 4 - Change password
  old_password = ""
  p first_user
  until first_user.password_checker?(old_password)
    puts "What's your old password"
    old_password = gets.chomp
    if first_user.password_checker?(old_password)
      puts "What's your new password"
      new_password = gets.chomp
      first_user.password_changer(new_password)
      old_password = new_password
    else
      puts "dummy try again"
    end
  end
  p first_user


# SCENARIO 5 - Add a new friend