Created
July 2, 2014 10:23
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SPA_2014
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class Bottles | |
def song | |
verses(99, 0) | |
end | |
def verses(upper_bound, lower_bound) | |
upper_bound.downto(lower_bound).map { |i| verse(i) }.join("\n") | |
end | |
def verse(verse_number) | |
current_bn = create_bottle_number(verse_number) | |
next_bn = create_bottle_number(current_bn.next) | |
"#{current_bn.quantity.capitalize} #{current_bn.container} of beer on the wall, " + | |
"#{current_bn.quantity} #{current_bn.container} of beer.\n" + | |
"#{current_bn.action}, " + | |
"#{next_bn.quantity} #{next_bn.container} of beer on the wall.\n" | |
end | |
def create_bottle_number(number) | |
if number == 0 | |
BottleNumber0.new(number) | |
elsif number == 1 | |
BottleNumber1.new(number) | |
elsif number == 6 | |
BottleSixPack.new(number) | |
else | |
BottleNumber.new(number) | |
end | |
end | |
end | |
class BottleNumber | |
attr_reader :number | |
def initialize(number) | |
@number = number | |
end | |
def container | |
'bottles' | |
end | |
def pronoun | |
'one' | |
end | |
def quantity | |
number.to_s | |
end | |
def action | |
"Take #{pronoun} down and pass it around" | |
end | |
def next | |
number - 1 | |
end | |
end | |
class BottleSixPack < BottleNumber | |
def quantity | |
(number / 6).to_s | |
end | |
def container | |
'six-pack' | |
end | |
end | |
class BottleNumber1 < BottleNumber | |
def pronoun | |
'it' | |
end | |
def container | |
'bottle' | |
end | |
end | |
class BottleNumber0 < BottleNumber | |
def next | |
99 | |
end | |
def action | |
"Go to the store and buy some more" | |
end | |
def quantity | |
'no more' | |
end | |
end |
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