Figure out who has commited code to a Github repo

who_commited.rb

# Make sure you gem install http
require 'http'

class Committer

  attr_reader :name, :email

  def initialize(params)
    @name = params["name"]
    @email = params["email"]
  end

end

class CommitterCollection
  include Enumerable

  def initialize
    @committers = []
  end

  def add(committer)
    if (find_by(:name, committer.name).nil?) && (find_by(:email, committer.email).nil?)
      @committers << committer
    end
  end

  def each(&block)
    @committers.each do |committer|
      block.call(committer)
    end
  end

  def find_by(method, value)
    @committers.find { |c| c.send(method) == value }
  end
end

class Github

  # Repository must be public
  def get_committers(owner, repository)
    JSON.parse(HTTP.get("https://api.github.com/repos/#{owner}/#{repository}/commits"))
  end

  def display_committers(owner, repository)
    commits = get_committers(owner, repository)
    committer_collection = CommitterCollection.new

    commits.each do |commit|
      commit_author = commit["commit"]["committer"]
      committer_collection.add(Committer.new(commit_author))
    end

    committer_collection.each do |committer|
      puts "Name: #{committer.name}, Email: #{committer.email}"
    end
  end
end

client = Github.new
client.display_committers('tiy-hou-q3-2015-rails', 'musik')