app.rb

require_relative "objects/post"
require_relative "objects/user"
require "colorize"

class App 

  def first_page
    puts "\nInput 1 for LOGIN, 2 for REGISTRATION, 0 for EXIT"
    case gets_i
    when 0
      log_out
    when 1
      log_in
      second_page
    when 2
      registration
      first_page
    else
      first_page
    end
  end

  def second_page
    puts "Press 0: EXIT, 1: See my INFO, 2: POSTS"
    case gets_i
    when 0 
      log_out
    when 1
      my_info
    when 2
      post_settings
    else
      second_page
    end
  end


  def log_in
    if User.all.empty?
      puts "For login first register"
      registration
    else
      print "\nEmail: "
      email = gets_chomp
      print "Password: "
      password = gets_chomp
      @user =  User.where(email: email).first
      if @user.nil? 
        puts "\nSorry, no registered user with given email "
        arr = all_users_emails.select do |emaill|
          emaill[0] == email[0]
        end
        if !arr.empty?
          puts "Did you mean?\n\t#{arr.join "\n\t"}"
          log_in
        else
          log_in
        end
      elsif @user.password != password || password == nil
        puts "Password is not match"
        log_in
      else
        puts "        Welcome #{@user.name}\n"
      end
    end
  end

  def registration
    puts "\n        REGISTRATION"
    @user = User.new

    print "Name: "
    name = gets_chomp while !validate_presence?(gets_chomp)
    @user.name = name

    print "Surname: "
    surname = gets_chomp while !validate_presence?(gets_chomp) 
    @user.surname = surname

    print "Age: "
    age = gets_chomp
    until age =~ /\A\d+\z/
      puts "Give me your age"
      age = gets_chomp
    end
    @user.age = age.to_i

    print "Email: "
    email = gets_chomp while validate_presence?(gets_chomp) 
    @user.email = email

    print "Password: "
    password = gets_chomp while validate_presence?(gets_chomp)
    @user.password = password

    print "Submit your data[y/n]? "
    if yes
      @user.save
      puts "Congrats User is saved!!!"
    end
  end

  def validate_presence?(string)
    if string.empty?
      puts "Input your data"
      false
    else
      true
    end
  end

  def my_info
    print <<EOF
  Name: #{@user.name}
  Surname: #{@user.surname}
  Age: #{@user.age}
  Email: #{@user.email}\n
EOF

  puts "Press 0 for DELETE, 1 for BACK, 2 for EDIT"
  case gets_i
  when 0
    delete_user
    log_out
  when 1
    second_page
  when 2
    edit_user
    second_page
  else
    second_page
  end

  end

  def edit_user
    puts "If you dont want change press ENTER "
    print "Name: "
    name = gets_chomp
    @user.name = name  unless name.empty?
    print "surname: "
    surname = gets_chomp
    @user.surname = surname unless surname.empty?
    print "age: "
    age = gets_i
    @user.age = age unless age == 0
    print "email: "
    email = gets_chomp
    @user.email = email unless email.empty?
    print "password: "
    password = gets_chomp
    @user.password = password unless password.empty?
    print "Save changes[y/n]? "
    if yes
      @user.save
      puts "Changes are saved!!!\n"
    end
  end

  def delete_user
    @user.delete
  end

  def post_settings
    puts "\n            POST SETTINGS"
    puts "1: add post, 2: delete post, 3: edit post, 4: list posts, 5: back"
    case gets_i
    when 1
      add_post
      post_settings
    when 2
      delete_post
      post_settings
    when 3
      edit_post
      post_settings
    when 4
      list_posts
      post_settings
    when 5
      second_page
    else 
      post_settings
    end
  end

  def add_post
    @post = Post.new
    @post.user_id = @user.id

    print "Post title: "
    title = gets_chomp 
    while !validate_presence?(title) 
      title = gets_chomp
    end
    @post.title = title 

    print "Post description: "
    description = gets_chomp while !validate_presence?(gets_chomp)
    @post.description = description  

    print "Submit your data[y/n]? "
    if yes
      @post.save
      puts "Post is saved!!!\n"
    end
  end

  def list_posts
    puts "\n            LIST POSTS"
    posts =  @user.posts
    if posts.empty?
      puts "No posts"
    else
      posts.each_with_index do |post,i|
        puts "#{i+1}. #{post.title}"
      end
    end
    posts
  end

  def delete_post
    posts = list_posts
    if !posts.empty?
      puts "Which one do you want to delete?(Number of post)"
      answer = gets_i
      if answer > posts.length || answer <= 0
        puts "\nArong number of post, choose right number"
        delete_post
      else
        print "Are you sure[y/n]? "
        if yes
          posts[answer-1].delete
          puts "Post is deleted!!!\n"
        end
      end
    end
  end

  def edit_post
    posts = list_posts
    if !posts.empty?
      puts "Which one do you want to change?"
      answer = gets_i
      if answer > posts.length || answer <= 0
        puts "\nArong number of post,choose rigth number"
        edit_post
      else
        print "Title: "
        title = gets_chomp
        posts[answer-1].title = title unless title.empty?
        print "Description: "
        description = gets_chomp
        posts[answer-1].description = description unless description.empty?
        print "Save changes[y/n]? "
        if yes
          posts[answer-1].save
          puts "Changes are saved!!!\n"
        end
      end
    end
  end

  def gets_chomp
    gets.strip.chomp    
  end

  def gets_i
    gets_chomp.strip.to_i
  end

  def yes
    gets_chomp == "y"
  end

  def log_out
    puts "\nBye :)".yellow
  end

  def all_users_emails
    User.all.map &:email 
  end

end

app = App.new
app.first_page