Add preference for report notification e-mails, skip for duplicates (#8559)

If an unresolved report for the same target account already exists,
no new notification is generated

app/models/report.rb

@@ -60,6 +60,10 @@ class Report < ApplicationRecord
     !action_taken?
   end
 
+  def unresolved_siblings?
+    Report.where.not(id: id).where(target_account_id: target_account_id).unresolved.exists?
+  end
+
   def history
     time_range = created_at..updated_at
 

app/models/user.rb

@@ -224,6 +224,10 @@ class User < ApplicationRecord
     settings.notification_emails['digest']
   end
 
+  def allows_report_emails?
+    settings.notification_emails['report']
+  end
+
   def hides_network?
     @hides_network ||= settings.hide_network
   end