open_auth2.rb

$LOAD_PATH.unshift(File.dirname(__FILE__))

require 'active_support/inflector'

module OpenAuth2
  module Provider
    class Base
      attr_accessor :client_id

      def initialize
        @client_id     = :default_client_id
        super
      end

      def configure
        yield self
        self
      end

      def set_defaults
        options.each do |key,value|
          instance_variable_set("@#{key}", value)
        end
      end
    end

    class Default < Base
      def options
        {}
      end
    end

    class Facebook < Base
      def options
        {}
      end
    end
  end
 
  class Config
    Keys = [
      :client_id, 
    ]

    attr_accessor *Keys, :provider

    Keys.each do |key|
      define_method key do
        instance_variable_get("@#{key}") || @provider.send(key)
      end
    end

    def initialize
      set_default_as_provider

      yield self if block_given?
      self
    end

    def provider=(name)
      @provider = name
      const_provider.set_defaults
    end

    def configure
      yield self
      self
    end

    def reset_providers
      set_default_as_provider
    end

    private

    def set_default_as_provider
      send(:provider=, :default)
    end

    def const_provider
      provider = @provider.to_s.capitalize
      string   = ['OpenAuth2', 'Provider', provider].join('::')
      @provider  = string.constantize.new
    end
  end
end