app.rb

require_relative 'book'
require_relative 'student'
require_relative 'teacher'
require_relative 'rentals'
require_relative 'stored'
require 'json'

module Create
  def create_a_person
    puts 'Do you want to create a student (1) or teacher (2)'
    x = gets.chomp.to_i
    case x
    when 1
      create_student
    when 2
      create_teacher
    end
  end

  def create_student
    puts 'classroom:'
    clsroom = gets.chomp
    puts 'Age:'
    age = gets.chomp
    puts 'Name:'
    name = gets.chomp
    puts 'permission:'
    parents_permission = gets.chomp
    std = Student.new(clsroom, age, name, parents_permission, id: Random.rand(1..1000))
    @people.push(std)
    person_string
  end

  def create_teacher
    puts 'specialization:'
    specilaze = gets.chomp
    puts 'Age:'
    age = gets.chomp
    puts 'Name:'
    name = gets.chomp
    teach = Teacher.new(specilaze, age, name, id: Random.rand(1..1000))
    @people.push(teach)
    person_string
  end

  def person_string
    jsonarray = []
    @people.each do |item|
      if item.instance_of?(Student)
        jsonarray.push({ classroom: item.classroom, age: item.age, name: item.name,
                         parents_permission: item.parents_permission, id: item.id })
      else
        jsonarray.push({ age: item.age, name: item.name, id: item.id })
      end
    end
    json = JSON.generate(jsonarray)
    File.write('people.json', json)
  end

  def list_all_people
    if @people.empty?
      puts 'There is no people'
    else
      puts @people.first.id
      @people.each { |p| puts "Name:#{p.name} Age:#{p.age} Class:#{p.class} ID:#{p.id}" }
    end
  end
end

module Books
  def list_all_books
    if @book.empty?
      puts 'There is no book'
    else
      @book.each { |b| puts "#{b.title} written by #{b.author}" }
    end
  end

  def create_a_book
    puts 'Title:'
    tit = gets.chomp
    puts 'Author:'
    auth = gets.chomp
    bo = Book.new(tit, auth)
    @book.push(bo)
    jsonarray = []
    @book.each { |item| jsonarray.push({ title: item.title, author: item.author }) }
    json = JSON.generate(jsonarray)
    File.write('book.json', json)
  end
end

class App
  def initialize
    @book = []
    @people = []
    @rental = []
    list_all_stored_books
    list_all_stored_people
    list_all_stored_rentals
  end

  include Create
  include Books

  def create_a_rental
    puts 'date(yyyy/dd/mm)'
    date = gets.chomp
    puts 'Select a book:'
    @book.each_with_index { |b, i| puts "#{i}) #{b.title} written by #{b.author}" }
    bookid = gets.chomp.to_i
    book = @book[bookid]
    puts 'Select a person:'
    @people.each_with_index { |p, i| puts "#{i}) #{p.name}" }
    personid = gets.chomp.to_i
    person = @people[personid]
    rental = Rental.new(date, book, person)
    @rental.push(rental)
    store_all_rentals
  end

  def store_all_rentals
    jsonarray = []
    @rental.each do |item|
      jsonarray.push({ date: item.date,
                       book: { title: item.book.title, author: item.book.author },
                       person: { id: item.person.id, name: item.person.name, age: item.person.age } })
    end
    File.write('rental.json', JSON.generate(jsonarray))
  end

  def list_all_rentals
    if @rental.empty?
      puts 'There are no rentals'
    else
      puts 'Please type person id'
      id = gets.chomp.to_i
      @rental.each do |r|
        puts "Date: #{r.date}, Book:#{r.book.title} by #{r.book.author}" if r.person.id == id
      end
    end
  end
end