add receive completed email config

app/jobs/process_submitter_completion_job.rb

@@ -26,12 +26,14 @@ class ProcessSubmitterCompletionJob < ApplicationJob
 
     user = submission.created_by_user || submitter.template.author
 
-    if submitter.template.account.users.exists?(id: user.id) &&
+    if submitter.account.users.exists?(id: user.id) &&
        submission.preferences['send_email'] != false
+      if user.user_configs.find_by(key: UserConfig::RECEIVE_COMPLETED_EMAIL)&.value != false
         SubmitterMailer.completed_email(submitter, user).deliver_later!
+      end
 
       bcc = submission.preferences['bcc_completed'].presence ||
-            submission.template.account.account_configs
+            submission.account.account_configs
                       .find_by(key: AccountConfig::BCC_EMAILS)&.value.presence
 
       bcc.to_s.scan(User::EMAIL_REGEXP).each do |to|

app/models/user_config.rb

@@ -22,6 +22,7 @@
 #
 class UserConfig < ApplicationRecord
   SIGNATURE_KEY = 'signature'
+  RECEIVE_COMPLETED_EMAIL = 'receive_completed_email'
 
   belongs_to :user