crm.rb

class Database
  attr_accessor :contacts

  def initialize
    @contacts = []
  end
end

class Contact
  attr_accessor :name, :age, :height, :weight

  def initialize(args)
    @name, @age, @height, @weight = args[:name], args[:age], args[:height], args[:weight]
  end

  def save(db)
    db.contacts << self
  end

  def destroy(db)
    db.contacts.delete(self)
  end
end

class ContactController

  def self.index(db, error_message = nil)
    @@db = db
    contacts = db.contacts

    puts ""
    puts "Contact List"
    puts ""

    print " Id".ljust(10)
    print "| Name".ljust(30)
    print "| Age".ljust(20)
    print "| Height".ljust(20)
    print "| Weight".ljust(20)
    puts ""
    puts "".ljust(100, "-")

    contacts.each_with_index do |contact, i|
      print " #{i + 1}".ljust(10)
      print "| #{contact.name}".ljust(30)
      print "| #{contact.age}".ljust(20)
      print "| #{contact.height}".ljust(20)
      print "| #{contact.weight}".ljust(20)
      puts ""
      puts "".ljust(100, "-")
    end

    puts ""
    puts "Enter one of the following commands:"
    puts "1) The contact id to view their profile"
    puts "2) The word 'new' to create a new contact"

    puts ""
    if error_message
      puts error_message
      puts ""
    end
    print "> "

    answer = gets.chomp()

    if answer.eql?("new")
      ContactController.new_action
    elsif answer.to_i > 0
      contact = db.contacts[answer.to_i - 1]
      if contact
        ContactController.show db, contact
      else
        ContactController.index db, "You have chosen to view an invalid contact"
      end
    else
      ContactController.index db, "You selection wasn't recognized."
    end

  end

  def self.show(db, contact)
    puts ""
    puts "Contacts > Viewing a contact"
    puts ""

    puts "Name:   #{contact.name}"
    puts "Age:    #{contact.age}"
    puts "Height: #{contact.height}"
    puts "Weight: #{contact.weight}"


    puts ""
    puts "Enter one of the following commands:"
    puts "1) The word 'back' to go back to the contacts list"
    puts "2) The word 'new' to create a new contact"
    puts "3) The word 'destroy' to create delete this contact"
    print "> "

    answer = gets.chomp()

    case answer
    when "back"
      ContactController.index(db)
    when "new"
      ContactController.new_action(db)
    when "destroy"
      print "Are you sure you want to destroy this contact? Y/N "
      destroy = gets.chomp()
      if destroy == "Y"
        db.contacts.delete(contact)
        ContactController.index(db)
      else
        ContactController.show(db, contact)
      end
    else
      ContactController.show(db, contact)
    end
  end
end

db = Database.new
c = Contact.new name: "Jonathan", age: 29
c.save(db)

c2 = Contact.new name: "A much longer name"
c2.save(db)

ContactController.index(db)