Add BadgeRewarder class and rake for auto badging (#367)

app/labor/badge_rewarder.rb

@@ -0,0 +1,9 @@
+class BadgeRewarder
+  def award_yearly_club_badges
+    message = "Happy DEV birthday!"
+    User.where("created_at < ? AND created_at > ?",1.year.ago, 367.days.ago).each do |user|
+      BadgeAchievement.create(user_id: user.id, badge_id: 2, rewarding_context_message: message)
+      # ID 2 is the proper ID in prod. We should change in future to ENV var.
+    end
+  end
+end

lib/tasks/fetch.rake

@@ -63,5 +63,12 @@ task :github_repo_fetch_all => :environment do
 end
 
 task :send_email_digest => :environment do
+  return if Time.now.wday < 3
   EmailDigest.send_periodic_digest_email
 end
+
+task :award_badges => :environment do
+  BadgeRewarder.new.award_yearly_club_badges
+end
+
+