Send emails for issues due tomorrow

Also, refactor the mail sending slightly: instead of one worker sending all
emails, create a worker per project with issues due, which will send all emails
for that project.

1 files changed, 14 insertions, 0 deletions

diff --git a/app/workers/mail_scheduler/issue_due_worker.rb b/app/workers/mail_scheduler/issue_due_worker.rb
new file mode 100644
index 00000000000..b06079d68ca
--- /dev/null
+++ b/app/workers/mail_scheduler/issue_due_worker.rb
@@ -0,0 +1,14 @@
+module MailScheduler
+  class IssueDueWorker
+    include ApplicationWorker
+    include MailSchedulerQueue
+
+    def perform(project_id)
+      notification_service = NotificationService.new
+
+      Issue.opened.due_tomorrow.in_projects(project_id).preload(:project).find_each do |issue|
+        notification_service.issue_due(issue)
+      end
+    end
+  end
+end