Add email counts to admin dashboard

app/models/email_log.rb

@@ -7,4 +7,8 @@ class EmailLog < ActiveRecord::Base
     # Update last_emailed_at if the user_id is present
     User.update_all("last_emailed_at = CURRENT_TIMESTAMP", id: user_id) if user_id.present?
   end
+
+  def self.count_per_day(since = 30.days.ago)
+    where('created_at > ?', since).group('date(created_at)').order('date(created_at)').count
+  end
 end