A Codewars API wrapper

codewars.rb

# frozen_string_literal: true

require 'dotenv'
require 'net/http'
require 'json'

module Codewars
  Dotenv.load('.env')
  ENDPOINT = 'https://www.codewars.com/api/v1/'
  API_KEY = ENV['CW_API_KEY']

  class User
    def initialize(id_or_username)
      @id_or_username = id_or_username
    end

    # GET User
    # https://www.codewars.com/api/v1/users/:id_or_username
    def info
      @info ||= Codewars.cw_request("users/#{@id_or_username}")
    end

    # GET User: Completed Challenges
    # https://www.codewars.com/api/v1/users/:id_or_username/code-challenges/completed?page=0
    def challenges_completed
      @challenges_completed ||= Codewars.cw_request("users/#{@id_or_username}/code-challenges/completed")
    end

    # GET User: Authored Challenges
    # https://www.codewars.com/api/v1/users/:id_or_username/code-challenges/authored
    def challenges_authored
      @challenges_authored ||= Codewars.cw_request("users/#{@id_or_username}/code-challenges/authored")
    end
  end

  class Challenge
    def initialize(id_or_slug)
      @id_or_slug = id_or_slug
    end

    # GET Code Challenge
    # https://www.codewars.com/api/v1/code-challenges/:id_or_slug
    def info
      @info ||= Codewars.cw_request("code-challenges/#{@id_or_slug}")
    end
  end

  # private
  def self.cw_request(path)
    res = Net::HTTP.get URI(ENDPOINT + path + '?access_key=' + API_KEY)
    JSON.parse res
  end
end

I would suggest don't include path (/api/v1) in the ENDPOINT variable. What if there is a API with version 2 (/api/v2)?

Better way to use it:

 ENDPOINT = 'https://www.codewars.com'

users = "#{ENDPOINT}/api/v1/users"