latest_ruby_tag_fetcher.trb

latest_ruby_tag_fetcher.trb

require "httparty"
require "json"
require "time"

class RubyVersion
  API_URL = "https://api.github.com/repos/ruby/ruby/releases/latest"

  class Response
    attr_reader :code: Integer
    attr_reader :json: Hash<String, untyped>


    def initialize(code: Integer, json: Hash<String, untyped>): nil
      @code = code
      @json = json
    end

    def success?: Boolean
      (200..299).include?(@code)
    end
  end


  def fetch_response: Response
    http = HTTParty.get(API_URL, headers: { 'User-Agent' => 'static-typing-demo' })
    Response.new(http.code.to_i, JSON.parse(http.body))
  end

  def self.fetch(printer: Proc<[String, String, Time], nil>): nil
    resp = new.fetch_response
    raise "HTTP #{resp.code}" unless (200..299).include?(resp.code)
    data = resp.json
    published = Time.parse((data['published_at'] || Time.now.utc.iso8601).to_s)
    printer.call((data['tag_name'] || data['name']).to_s, data['html_url'], published)
  end
end