slack-ruby/slack-ruby-bot-server

require 'rack/cors'
require 'rack-rewrite'
require 'rack-server-pages'
require 'otr-activerecord' if SlackRubyBotServer::Config.activerecord? && !defined?(Rails)

module SlackRubyBotServer
  module Api
    class Middleware
      include SlackRubyBotServer::Loggable

      def self.reset!
        @instance = nil
      end

      def self.instance
        @instance ||= Rack::Builder.new do
          use OTR::ActiveRecord::ConnectionManagement if SlackRubyBotServer::Config.activerecord? && defined?(::OTR)

          use Rack::Cors do
            allow do
              origins '*'
              resource '*', headers: :any, methods: %i[get post]
            end
          end

          # rewrite HAL links to make them clickable in a browser
          use Rack::Rewrite do
            r302 %r{(\/[\w\/]*\/)(%7B|\{)?(.*)(%7D|\})}, '$1'
          end

          use Rack::ServerPages do |config|
            config.view_path = SlackRubyBotServer::Config.view_paths
          end

          run Middleware.new
        end.to_app
      end

      def call(env)
        Endpoints::RootEndpoint.call(env)
      end
    end
  end
end