jejacks0n/bitbot

module Bitbot
  module Listener
    autoload :Web, "bitbot/listener/web"

    class Base
      def self.type_name
        name.split("::").last.downcase.to_sym
      end

      attr_writer :token

      def initialize
        yield self if block_given?
        Bitbot.log("Warning, no outgoing slack token provided.") unless @token
      end

      def listen
        raise Bitbot::Error.new("Expected subclass to implement the `listen` method.")
      end

      private

        def handle_exception(e, req)
          Bitbot.configuration.handle_exception(e, req)
        end

        def router
          @router ||= Bitbot::Router.new
        end

        def verified_request(env)
          req = Rack::Request.new(env)
          return false unless req.post? && req.path == @path                     # only posts at the desired path
          return false unless req["text"].is_a?(String)                          # no empty messages
          return false unless req["user_name"] != Bitbot.configuration.user_name # no replies to myself
          return false unless valid_token?(req["token"])                         # no messages not from slack
          req
        end

        def valid_token?(token)
          if @token.is_a?(Array)
            @token.include?(token)
          else
            @token == token
          end
        end
    end
  end
end