Aftermath of our conversation

task.rb

require 'net/http'
require 'socket'
require 'uri'
require 'cgi'

module Esnictoiat
  class Router
    def self.get(url_path, options)
      @@routes ||= {}
      @@routes[url_path] ||= {}
      @@routes[url_path]['GET'] = options[:to]
    end

    def route(path, verb)
      @@routes.dig(path, verb)
    end

    get '/hello', to: 'Hello#hello'
  end

  class Request
    attr_reader :path, :verb, :params

    def initialize(verb, path, params = nil)
      @verb = verb
      @path = path
      @params = params
    end

    def run
      router = Router.new

      controller_name, action_name = router.route(path, verb)&.split('#')

      unless controller_name && action_name
        return "HTTP/1.1 404 Not Found"
      end

      controller_class =
        Esnictoiat.const_get("#{controller_name.capitalize}Controller")

      action_symbol = action_name.to_sym
      controller_class.new(params).instance_eval(action_name)
    end
  end


  class Params
    attr_reader :raw_params, param_restrictions

    def initialize(params)
        @raw_params = params
    end

    def get(keyword)
        pure_params = raw_params
        param_restrictions[:required].each do |kw|
            raise ArgumentError unless pure_params
        end
        pure_params.fetch(keyword.to_s, ['Fetch Error']).first
    end
    
    def permit(*param_names)
        @param_restrictions[:permitted].concat([*param_names])
    end

    def require(*param_names)
        @param_restrictions[:required].concat([*param_names])
    end
  end

  class Controller
    attr_reader :params, param_restrictions

    def initialize(params)
        @params = Params.new(params)
    end
  end

  class HelloController < Esnictoiat::Controller
    def hello
     "HTTP/1.1 200 OK\n\nHello #{params.fetch('name', 'Stranger').first}!"
    end

    private

    def hello_params
        params.require(:params).permit(:name)
    end
  end
end


server = TCPServer.new 2020
puts "CodequestServer 2020"
puts "========================="
puts "I'm up and running"

loop do
  client = server.accept
  verb, url, _ = client.gets.split

  url = URI(url)

  query_params = CGI::parse(url.query) if url.query # TODO
  response = Esnictoiat::Request.new(verb, url.path, query_params).run
  client.puts response

  client.close
end