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/controllers/settings/preferences_controller.rb

@@ -46,7 +46,7 @@ class Settings::PreferencesController < ApplicationController
       :setting_noindex,
       :setting_theme,
       :setting_hide_network,
-      notification_emails: %i(follow follow_request reblog favourite mention digest),
+      notification_emails: %i(follow follow_request reblog favourite mention digest report),
       interactions: %i(must_be_follower must_be_following)
     )
   end

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

app/services/report_service.rb

@@ -26,7 +26,10 @@ class ReportService < BaseService
   end
 
   def notify_staff!
+    return if @report.unresolved_siblings?
+
     User.staff.includes(:account).each do |u|
+      next unless u.allows_report_emails?
       AdminMailer.new_report(u.account, @report).deliver_later
     end
   end

app/views/settings/notifications/show.html.haml

@@ -12,6 +12,9 @@
       = ff.input :favourite, as: :boolean, wrapper: :with_label
       = ff.input :mention, as: :boolean, wrapper: :with_label
 
+      - if current_user.staff?
+        = ff.input :report, as: :boolean, wrapper: :with_label
+
   .fields-group
     = f.simple_fields_for :notification_emails, hash_to_object(current_user.settings.notification_emails) do |ff|
       = ff.input :digest, as: :boolean, wrapper: :with_label