elevator.rb

# Simplified version of calvin stephens (http://github.com/Calvin4) elevator program.

class Building

  # Ask the user for the top floor of the building
  def get_top_floor
    puts "Please enter the top floor: "
    @top_floor = gets.chomp!.to_i
  end
  
  # Ask the user for the floor they want to go to
  def get_floor
    puts "Please enter the floor you want to go to: "
    input = gets.chomp!
    validate_floor(input)
  end

  # Check the input to make sure it's an number
  def validate_floor(input)
    if input =~ /(\d+)/
      new_floor = input.to_i
      go_to_floor(new_floor)
    else
      puts "Please enter an integer between 0 and " + @top_floor.to_s + "."
      get_floor
    end
  end
  
  # Go to the floor the user entered if it exists in the building
  def go_to_floor(new_floor)
    if new_floor > @top_floor || new_floor <= 0
      puts "The elevator only goes to floors 1-" + @top_floor.to_s + "."
      get_floor
    elsif new_floor < 10 && new_floor > 0
      puts "Going to floor #{new_floor}" + "."
      output_state(new_floor)
      get_floor
    end
  end
  
  # Let the user know they've arrived at their destination
  def output_state(new_floor)

    puts "You've arrived at floor " + new_floor.to_s + "."
  end
end

# Instantiate a building
my_building = Building.new

# Get input for the top floor
my_building.get_top_floor

# Get input for floor to travel to
my_building.get_floor