Github Score Calculator - Refactoring for: https://codereview.stackexchange.com/questions/222403/github-page-dhh-score-challenge-in-ruby

score.rb

require 'typhoeus'
require 'json'

# 1. Get data from http
# 2. Parsing JSON
# 3. Calculate score
# 4. Show score
class Http
  attr_reader :client

  def initialize(client = Typhoeus)
    @client = client
  end

  def get(url)
    client.get(url).body
  end
end

class Github
  BASE_URI = "https://api.github.com"

  attr_reader :http

  def initialize(http: Http.new)
    @http = http
  end

  def events(user)
    parse http.get(URI.join(BASE_URI, "/users/#{user}/events/public"))
  end

  private

  def parse(body)
    json(body).map { |entry| OpenStruct.new(entry) }
  end

  def json(body)
    JSON.parse(body)
  end
end

class ScoreSet
  include Enumerable

  attr_reader :scores

  def initialize(scores)
    @scores = scores
  end

  def each(&block)
    @scores.each(&block)
  end

  def for(name)
    find { |s| s.name == name } || Score.new(name, 1)
  end
end

class Score
  attr_reader :name, :weight

  def initialize(name, weight)
    @name   = name
    @weight = weight
  end
end

class CalculateUserScore
  def initialize(events, score_set)
    @events = events
    @score_set = score_set
  end

  def call
    @events.map { |e| @score_set.for(e.type) }.sum(&:weight)
  end
end

scores = ScoreSet.new([
  Score.new("IssuesEvent", 7),
  Score.new("IssueCommentEvent", 6),
  Score.new("PushEvent", 5),
  Score.new("PullRequestReviewCommentEvent", 4),
  Score.new("WatchEvent", 3),
  Score.new("CreateEvent", 2),
])

events = Github.new.events("dhh")
puts CalculateUserScore.new(events, scores).call