server.rb

require 'rubygems'
require 'sinatra'
require 'dm-core'
require 'dm-migrations'
require 'json'

# only in dev mode, reloads server on changes
require "sinatra/reloader"

require_relative 'Game'

class StoredGame
  include DataMapper::Resource

  property :id, Serial
  property :title, String, :length => 255, :default => "Unnamed game"
  property :board, Object, :lazy => true
  # todo connection between players & robots, roles
end

configure do
  # connect DataMapper to a local sqlite file.
  DataMapper.setup(:default, (ENV["DATABASE_URL"] || "sqlite3:///#{Dir.pwd}/development.sqlite3"))
  DataMapper.finalize
  DataMapper.auto_upgrade!
end

# always allow reading from a different server
before do
  response['Access-Control-Allow-Origin'] = '*'
  expires 500, :public, :must_revalidate

  #p request.body.read
end

# index
get '/' do
  result = '<a href="/new_game">new game</a><br>
     <a href="/games">games</a><br>'

  StoredGame.all.each { |game| result += "<br><a href=\"games/#{game.id}\">#{game.id}</a>" }

  result
end


# create a new game
get '/new_game' do
  game = StoredGame.new()
  game.title = "Katzenjammer"
  #game.board = Game.new()
  game.board = Game.create([["Le Lw", "Cs Pw", "_ Ww"], ["R", "", ""], ["", "", ""]])

  halt(500, "Game was not created #{game.errors.inspect}") unless game.save

  content_type 'application/json'
  {'id' => game.id}.to_json
end


# list all games
get '/games' do
  games = StoredGame.all
  results = {}
  games.each { |game| results["#{game.id}"] = game.title }

  content_type 'application/json'
  results.to_json
end

get '/games/:id' do
  id = params[:id].to_i
  game = StoredGame.get(id)

  halt(404, 'Game not found') if game.nil?

  content_type 'application/json'
  {'title' => game.title, 'board' => game.board.board}.to_json
end


# 404 handler
not_found do
  "404"
end

# @e holds whatever was thrown, for this example, a string, 
# but it could have an Error class of some sort.
error do
  request.env['sinatra_error']
end