rps_part1.md

Rock, Paper, Scissors - Part 1

Objectives

• Create a route in Sinatra using a parameter
• Use a before filter
• Validate parameters and respond appropriately

Reading

http://www.sinatrarb.com/intro.html#Routes

Instructions

Scaffold your app

Create your ruby app file

1. Create a folder called rock_paper_scissor
2. Create a file called game.rb
3. In this file, require Sinatra
4. Create a Game module to wrap your app in.
5. Inside the Game module, create a RPS_App class that extends Sinatra::Application

Create your rack file

1. Create a file called config.ru
2. Inside config.ru require game
3. Then call a run to your app (don't forget that it is wrapped in a module!)

Create the game

Our app will be played at the path /throw. To play, a user will hit /throw/:type, for example: /throw/rock will play rock.

1. Define a route at /throw that responds to a get request and takes a single parameter called :type
2. This route should randomly generate a move by the computer.
3. The computer move and user move should be compared.
4. The results of the match should be displayed on the page.

Extensions

1. Create an error if the user tries to throw an incorrect move.
2. Extend the game to include a new move, see RPS Variations.
3. Creating a landing page with links, so one does not need to edit the URL in the browser.
4. Make it look pretty!