naive game controller

games_controller.rb

# POST /games/1/join_game {:id => <game_id>, :user_id => <player_id> }
def join_game
  @game = Game.find(params[:id])
  @game.players << User.find(:user_id)
  ...
end

# POST /games/1/leave_game {:id => <game_id>, :user_id => <player_id> }
def leave_game
  @game = Game.find(params[:id])
  @game.players -= User.find(:user_id)
  ...
end

# POST /games/1/make_move {:id => <game_id>, :move => {:user_id => <player_id>, :x => <x-coord>, :y => <y-coord>}}
def make_move
  @game = Game.find(params[:id])
  @game.add_move(params[:move])
end