grokify / lita_dotenv

  class Loader

    attr_accessor :config

     def initialize(config)

       @config = config

       Dotenv.load

       config_env

     end

     def config_env

      ENV.keys.grep(/^LITA_/i) do |key|

        val = ENV[key]

        slugs = key.split('__')

         # Convert value types

        if slugs.length==2

          type = slugs[1].downcase

          if type=='typesym'

            val = val.to_sym

          elsif type == 'typebool'

            val = val.downcase == 'true' ? true : false

          elsif type == 'typeint' && val =~ /^\s*[0-9]+\s*$/

            val = val.to_i

          elsif type == 'typejson'

            val = MultiJson.decode val

          elsif type == 'typejsonsym'

            val = MultiJson.decode val, symbolize_keys: true

          end

        end

         # Convert path

        path = slugs[0].split('_')

        path.shift # Remove LITA prefix

        path.each_with_index do |part, i|

          if part =~ /[a-z]/

            path[i] = part.gsub(/([A-Z])/, '_\1')

          end

          path[i].downcase!

        end

        if path.length == 2

          @config.send(path[0]).send("#{path[1]}=",val)

        elsif path.length == 3

          @config.send(path[0]).send(path[1]).send("#{path[2]}=",val)

        else

          raise "Config path length #{path.length} not supported for #{path.join('.')}."

        end

      end

    end

  end

end