Added emails for new users who arent PRO

• Added:
- emails for new users who arent PRO

app/workers/introduce_account_pro_worker.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class IntroduceAccountProWorker
+  include Sidekiq::Worker
+
+  sidekiq_options queue: 'mailers', retry: 2
+
+  attr_reader :user
+
+  def perform(acct_id, date_range)
+    @acct = Account.find(acct_id)
+    deliver_email(date_range)
+  end
+
+  private
+
+  def deliver_email(date_range)
+    UserMailer.introduce_pro(@acct.user, date_range).deliver_now!
+    @acct.user.touch(:last_emailed_at)
+  end
+end

app/workers/scheduler/introduce_pro_scheduler.rb

@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+class Scheduler::IntroduceProScheduler
+  include Sidekiq::Worker
+
+  sidekiq_options retry: 1
+  
+  def perform
+    new_accounts(8.days.ago, 7.days.ago).find_each do |acct|
+      IntroduceAccountProWorker.perform_async(acct.id, '7')
+    end
+
+    new_accounts(16.days.ago, 15.days.ago).find_each do |acct|
+      IntroduceAccountProWorker.perform_async(acct.id, '15')
+    end
+
+    new_accounts(31.days.ago, 30.days.ago).find_each do |acct|
+      IntroduceAccountProWorker.perform_async(acct.id, '30')
+    end
+  end
+
+  private
+
+  def new_accounts(start_date, end_date)
+    Account.where('is_pro=FALSE AND pro_expires_at IS NULL AND created_at BETWEEN ? AND ?', start_date, end_date)
+  end
+
+end