Add system note when due date is changed

2 files changed, 25 insertions, 0 deletions

diff --git a/app/services/issuable/common_system_notes_service.rb b/app/services/issuable/common_system_notes_service.rb
index 028b350ca07..b1efebaf388 100644
--- a/app/services/issuable/common_system_notes_service.rb
+++ b/app/services/issuable/common_system_notes_service.rb
@@ -17,6 +17,7 @@ module Issuable
       create_labels_note(old_labels) if issuable.labels != old_labels
       create_discussion_lock_note if issuable.previous_changes.include?('discussion_locked')
       create_milestone_note if issuable.previous_changes.include?('milestone_id')
+      create_due_date_note if issuable.previous_changes.include?('due_date')
     end
 
     private
@@ -88,6 +89,10 @@ module Issuable
       SystemNoteService.change_milestone(issuable, issuable.project, current_user, issuable.milestone)
     end
 
+    def create_due_date_note
+      SystemNoteService.change_due_date(issuable, issuable.project, current_user, issuable.due_date)
+    end
+
     def create_discussion_lock_note
       SystemNoteService.discussion_lock(issuable, current_user)
     end
diff --git a/app/services/system_note_service.rb b/app/services/system_note_service.rb
index dda89830179..ba6709c010b 100644
--- a/app/services/system_note_service.rb
+++ b/app/services/system_note_service.rb
@@ -160,6 +160,26 @@ module SystemNoteService
     create_note(NoteSummary.new(noteable, project, author, body, action: 'milestone'))
   end
 
+  # Called when the due_date of a Noteable is changed
+  #
+  # noteable  - Noteable object
+  # project   - Project owning noteable
+  # author    - User performing the change
+  # due_date  - Due date being assigned, or nil
+  #
+  # Example Note text:
+  #
+  #   "removed due date"
+  #
+  #   "changed due date to September 20, 2018"
+  #
+  # Returns the created Note object
+  def change_due_date(noteable, project, author, due_date)
+    body = due_date ? "changed due date to #{due_date.to_s(:long)}" : 'removed due date'
+
+    create_note(NoteSummary.new(noteable, project, author, body, action: 'due_date'))
+  end
+
   # Called when the estimated time of a Noteable is changed
   #
   # noteable      - Noteable object