Reopen mr email notification.

app/mailers/emails/merge_requests.rb

@@ -41,6 +41,19 @@ module Emails
            to: recipient(recipient_id),
            subject: subject("#{@merge_request.title} (##{@merge_request.iid})"))
     end
+
+    def merge_request_status_email(recipient_id, merge_request_id, status, updated_by_user_id)
+      @merge_request = MergeRequest.find(merge_request_id)
+      @mr_status = status
+      @project = @merge_request.project
+      @updated_by = User.find updated_by_user_id
+      @target_url = project_merge_request_url(@project, @merge_request)
+      set_reference("merge_request_#{merge_request_id}")
+
+      mail(from: sender(updated_by_user_id),
+           to: recipient(recipient_id),
+           subject: subject("#{@merge_request.title} (##{@merge_request.iid}) #{@mr_status}"))
+    end
   end
 
   # Over rides default behavour to show source/target

app/services/merge_requests/reopen_service.rb

@@ -3,6 +3,7 @@ module MergeRequests
     def execute(merge_request)
       if merge_request.reopen
         event_service.reopen_mr(merge_request, current_user)
+        notification_service.reopen_mr(merge_request, current_user)
         create_note(merge_request)
         execute_hooks(merge_request)
         merge_request.reload_code

app/services/notification_service.rb

@@ -99,6 +99,10 @@ class NotificationService
     end
   end
 
+  def reopen_mr(merge_request, current_user)
+    reopen_resource_email(merge_request, merge_request.target_project, current_user, 'merge_request_status_email', 'reopened')
+  end
+
   # Notify new user with email after creation
   def new_user(user)
     # Don't email omniauth created users

app/views/notify/merge_request_status_email.html.haml

+%p
+  = "Merge Request ##{@merge_request.iid} was #{@mr_status} by #{@updated_by.name}"

app/views/notify/merge_request_status_email.text.haml

+= "Merge Request ##{@merge_request.iid} was #{@mr_status} by #{@updated_by.name}"
+
+Merge Request url: #{project_merge_request_url(@merge_request.target_project, @merge_request)}
+
+= merge_path_description(@merge_request, 'to')
+
+Author: #{@merge_request.author_name}
+Assignee: #{@merge_request.assignee_name}