bdw OO

bike.rb

# OO for the win!

# Bike class
# Classes in Ruby are Capitalized and are defined like so...

class Bike
  # Accessors are handy, this is the equivalant of 
  #
  #  def state
  #    @state
  #  end
  #
  #  def state=(state)
  #    @state = state
  #  end
  #
  attr_accessor :motion, :gear

  # Every Ruby class has an initialize method that is fired
  # when we instantiate the class.  Here we are creating our own
  # initialzer method so we can do cool stuff.
  def initialize(gear = 24, state = 'stopped')
    @motion = state
    @gear = gear
  end

  # I'm an instance method, you need to instantiate 
  # the Bike class before you can call me!
  def pedal
    @motion = 'pedaling'
  end

  def coast
    @motion = 'coasting'
  end

  def brake
    @motion = 'braking'
    puts "Braking..."
    sleep 1
    @motion = 'stopped'
  end

  # I'm a class method (notice self. in front of the method name),
  # you don't need to instantiate / create a new instance of Bike
  # to call me.
  def self.description
    "I'm a bike class you can configure and ride!"
  end

  def wheel_size
    "I'm not sure"
  end
end

# puts "Calling class method .description"
# puts Bike.description

# # Let's create a new instance of the Bike class
my_bike = Bike.new
puts "Currently I'm #{my_bike.motion}."

puts my_bike.gear
# my_rad_bike = Bike.new("coasting")
# my_bike.pedal
# puts "Now I'm #{my_bike.state}."
# puts "Now I'm rad #{my_rad_bike.state}."

# my_bike.coast
# puts "Now I'm #{my_bike.state}."

# my_bike.brake
# puts "Now I'm #{my_bike.state}."


# # # Now let's make a Mountain bike that "inherits" our Bike class

class MountainBike < Bike
  def pedal
    puts "Pedaling on some sick singletrack!"
    super
  end

  def wheel_size
    "650B"
  end

  def front_fork
    "White Brothers Loop"
  end
end

# # # Let's create a new instance of the MountainBike class that inherits the Bike class
my_mtb = MountainBike.new
my_mtb.pedal
puts "Still #{my_mtb.motion}."

# puts "I'm rolling on #{my_mtb.wheel_size}'s!"

# puts "My #{my_mtb.front_fork} is eating it!!"

# puts "This is gonna break"

# my_bike.front_fork