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@rkh
Created October 30, 2011 06:44
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Rock, paper, scissors in Sinatra
require 'sinatra'
# before we process a route, we'll set the response as
# plain text and set up an array of viable moves that
# a player (and the computer) can perform
before do
content_type :txt
@defeat = {rock: :scissors, paper: :rock, scissors: :paper}
@throws = @defeat.keys
end
get '/throw/:type' do
# the params[] hash stores querystring and form data.
player_throw = params[:type].to_sym
# in the case of a player providing a throw that is not valid,
# we halt with a status code of 403 (Forbidden) and let them
# know they need to make a valid throw to play.
if !@throws.include?(player_throw)
halt 403, "You must throw one of the following: #{THROWS}"
end
# now we can select a random throw for the computer
computer_throw = @throws.sample
# compare the player and computer throws to determine a winner
if player_throw == computer_throw
"You tied with the computer. Try again!"
elsif computer_trow == @defeat[player_throw]
"Nicely done; #{player_throw} beats #{computer_throw}!"
else
"Ouch; #{computer_throw} beats #{player_throw}. Better luck next time!"
end
end
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