container-example.rb

module Imprint
  class Container
    extend Dry::Container::Mixin

    class << self
      attr_reader :root

      def register_dir(dir, eager: false, instantiate: true)
        Dir["#{root}/#{dir}/**/*.rb"].map do |path|
          name = path.sub("#{root}/", '').sub('.rb', '')
          constant_name = Inflecto.camelize('imprint/' + name)

          name.gsub('/', '.').tap do |key|
            loader = -> do
              require path.sub('.rb', '')
              klass = Inflecto.constantize(constant_name)

              if block_given?
                yield(klass)
              elsif instantiate
                klass.new
              else
                klass
              end
            end

            if eager
              register(key, loader.call)
            else
              register(key, loader)
            end
          end
        end
      end
    end

    @root = Pathname(__FILE__).realpath.dirname

    container = self

    register(:logger) { Logger.new('/dev/null') }

    register(:rom) do
      config = ROM::Configuration.new(default: [:sql, ENV['IMPRINT_DATABASE_URL']])
      config.auto_registration(container.root)

      ROM.container(config).tap do |rom|
        rom.gateways[:default].connection.loggers << container['logger']
      end
    end

    register_dir(:models, instantiate: false)

    register_dir(:repositories) do |repo|
      repo.new(container[:rom])
    end

    register_dir(:utils)
    register_dir(:builders)
    register_dir(:services)
  end
end